/* === Root variables === */
:root {
    --clr-primary: #4f46e5;
    --clr-primary-light: #8b85f7;
    --clr-primary-dark: #3c3bab;
    --clr-accent: #f97316;
    --clr-success: #10b981;
    --clr-danger: #ef4444;
    --clr-warning: #f59e0b;
    --clr-bg: #f9fafb;
    --clr-card: #ffffff;
    --clr-border: #e5e7eb;
    --clr-text-dark: #1f2937;
    --clr-text-light: #6b7280;
    --clr-text-lighter: #9ca3af;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    --radius-sm: 0.375rem;
    --radius: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
}

/* === Global styles === */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: 'Inter', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: var(--clr-bg);
    color: var(--clr-text-dark);
    line-height: 1.6;
    min-height: 100vh;
}

/* === Sidebar === */
.sidebar {
    position: fixed;
    left: 0;
    top: 0;
    height: 100vh;
    width: 260px;
    background: linear-gradient(180deg, var(--clr-primary), var(--clr-primary-dark));
    color: white;
    padding: 2rem 1.5rem;
    display: flex;
    flex-direction: column;
    box-shadow: var(--shadow-lg);
    z-index: 1000;
    overflow-y: auto;
}

.sidebar-header {
    margin-bottom: 2rem;
    text-align: center;
}

.sidebar-header h2 {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: 0.05em;
    margin-bottom: 0.5rem;
}

.sidebar-header .subtitle {
    font-size: 0.875rem;
    opacity: 0.8;
    font-weight: 400;
}

.sidebar-nav {
    list-style: none;
    flex-grow: 1;
}

.sidebar-nav li {
    margin-bottom: 0.75rem;
}

.sidebar-nav a {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: white;
    text-decoration: none;
    padding: 0.75rem 1rem;
    border-radius: var(--radius);
    transition: all 0.2s ease;
    font-weight: 500;
}

.sidebar-nav a:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateX(5px);
}

.sidebar-nav a i {
    font-size: 1.25rem;
    width: 24px;
    text-align: center;
}

.logout-btn {
    margin-top: auto;
    padding: 0.75rem 1rem;
    background: var(--clr-danger);
    color: white;
    border: none;
    border-radius: var(--radius);
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    transition: all 0.2s ease;
}

.logout-btn:hover {
    background: #dc2626;
    transform: translateY(-2px);
}

/* === Main content === */
.main {
    margin-left: 260px;
    padding: 2rem;
    min-height: 100vh;
}

/* === Headings === */
.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 2px solid var(--clr-border);
}

.page-header h1 {
    font-size: 2rem;
    color: var(--clr-primary-dark);
    font-weight: 700;
}

/* === Post cards === */
.post-card {
    background: var(--clr-card);
    border-radius: var(--radius-xl);
    padding: 2rem;
    margin-bottom: 2rem;
    box-shadow: var(--shadow);
    border: 1px solid var(--clr-border);
    transition: all 0.3s ease;
    position: relative;
}

.post-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
}

.post-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 1.5rem;
}

.post-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--clr-text-dark);
    margin-bottom: 0.5rem;
    line-height: 1.3;
}

.post-meta {
    display: flex;
    gap: 1rem;
    color: var(--clr-text-light);
    font-size: 0.875rem;
    align-items: center;
}

.post-author {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 500;
}

.post-author::before {
    content: "\\1F464";
}

.post-content {
    color: var(--clr-text-dark);
    line-height: 1.7;
    margin-bottom: 1.5rem;
    white-space: pre-wrap;
    padding: 1rem;
    background: var(--clr-bg);
    border-radius: var(--radius);
    border-left: 4px solid var(--clr-primary);
}


.attachment-preview {
    margin: 1rem 0 1.5rem;
    padding: 0.75rem;
    background: linear-gradient(145deg, #f8faff, #eef2ff);
    border: 1px solid #dbe4ff;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    text-align: center;
}

.attachment-preview-comment {
    max-width: 420px;
    margin-left: 3rem;
}

.attachment-image {
    width: auto;
    max-width: 100%;
    max-height: min(720px, 70vh);
    object-fit: contain;
    border-radius: var(--radius);
    display: block;
    margin: 0 auto;
}

.attachment-input {
    margin-top: 0.75rem;
}


.attachment-image {
    cursor: zoom-in;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.attachment-image:hover {
    transform: scale(1.01);
    box-shadow: var(--shadow-md);
}

.image-modal {
    position: fixed;
    inset: 0;
    background: rgba(15, 23, 42, 0.85);
    z-index: 2000;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 2rem;
}

.image-modal.active {
    display: flex;
}

.image-modal-preview {
    max-width: min(1200px, 94vw);
    max-height: 90vh;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    object-fit: contain;
    background: #000;
}

.image-modal-close {
    position: absolute;
    top: 1rem;
    right: 1rem;
    border: none;
    border-radius: 999px;
    width: 42px;
    height: 42px;
    background: rgba(255, 255, 255, 0.15);
    color: #fff;
    cursor: pointer;
    font-size: 1rem;
}

/* === Post actions === */
.post-actions {
    display: flex;
    gap: 1rem;
    margin-bottom: 1.5rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--clr-border);
}

.action-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: var(--clr-bg);
    border: 1px solid var(--clr-border);
    border-radius: var(--radius);
    color: var(--clr-text-light);
    cursor: pointer;
    transition: all 0.2s ease;
    font-weight: 500;
}

.action-btn:hover {
    background: var(--clr-primary);
    color: white;
    border-color: var(--clr-primary);
}

.like-btn:hover {
    background: var(--clr-success);
    border-color: var(--clr-success);
}

.dislike-btn:hover {
    background: var(--clr-danger);
    border-color: var(--clr-danger);
}

.delete-btn {
    background: var(--clr-danger);
    color: white;
    border: none;
}

.delete-btn:hover {
    background: #dc2626;
}

/* === Comments section === */
.comments-section {
    margin-top: 2rem;
}

.comments-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1.5rem;
    color: var(--clr-text-dark);
    font-weight: 600;
    font-size: 1.25rem;
}

.comments-header::before {
    content: "\\1F4AC";
    font-size: 1.5rem;
}

/* === Threaded comments === */
.comments-tree {
    margin-left: 0;
}

.comment {
    background: var(--clr-bg);
    border-radius: var(--radius-lg);
    padding: 1.25rem;
    margin-bottom: 1rem;
    border: 1px solid var(--clr-border);
    position: relative;
}

.comment.reply {
    margin-left: 2rem;
    margin-top: 1rem;
    background: white;
    border-left: 3px solid var(--clr-primary-light);
}

.comment-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.75rem;
}

.comment-author {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.author-avatar {
    width: 32px;
    height: 32px;
    background: var(--clr-primary);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 0.875rem;
}

.author-name {
    font-weight: 600;
    color: var(--clr-text-dark);
}

.comment-time {
    color: var(--clr-text-lighter);
    font-size: 0.75rem;
}

.comment-content {
    color: var(--clr-text-dark);
    line-height: 1.6;
    margin-bottom: 1rem;
    padding-left: 0.5rem;
}

.comment-actions {
    display: flex;
    gap: 1rem;
    margin-top: 0.75rem;
}

.reply-btn {
    background: none;
    border: none;
    color: var(--clr-primary);
    cursor: pointer;
    font-size: 0.875rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 0.25rem;
    padding: 0.25rem 0.5rem;
    border-radius: var(--radius-sm);
    transition: all 0.2s ease;
}

.reply-btn:hover {
    background: var(--clr-primary);
    color: white;
}

.reply-btn:disabled {
    color: var(--clr-text-lighter);
    cursor: default;
}

.reply-btn:disabled:hover {
    background: none;
    color: var(--clr-text-lighter);
}

/* === Comment form === */
.comment-form-container {
    background: var(--clr-card);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    margin-top: 2rem;
    box-shadow: var(--shadow);
    border: 1px solid var(--clr-border);
}

.comment-form-title {
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--clr-text-dark);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.comment-form-title::before {
    content: "\\270D";
}

.comment-form {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.comment-input {
    width: 100%;
    min-height: 120px;
    padding: 1rem;
    border: 2px solid var(--clr-border);
    border-radius: var(--radius);
    font-family: inherit;
    font-size: 1rem;
    resize: vertical;
    transition: border-color 0.2s ease;
}

.comment-input:focus {
    outline: none;
    border-color: var(--clr-primary);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

.form-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.char-counter {
    color: var(--clr-text-lighter);
    font-size: 0.875rem;
}

.submit-btn {
    padding: 0.75rem 2rem;
    background: var(--clr-primary);
    color: white;
    border: none;
    border-radius: var(--radius);
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
}

.submit-btn:hover {
    background: var(--clr-primary-dark);
    transform: translateY(-2px);
}

/* === Create post form === */
.create-post-form {
    background: var(--clr-card);
    border-radius: var(--radius-xl);
    padding: 2rem;
    max-width: 800px;
    margin: 0 auto;
    box-shadow: var(--shadow-lg);
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--clr-text-dark);
}

.form-input {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 2px solid var(--clr-border);
    border-radius: var(--radius);
    font-size: 1rem;
    transition: all 0.2s ease;
}

.form-input:focus {
    outline: none;
    border-color: var(--clr-primary);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

textarea.form-input {
    min-height: 150px;
    resize: vertical;
    font-family: inherit;
}

/* === Messages === */
.alert {
    padding: 1rem 1.5rem;
    border-radius: var(--radius);
    margin-bottom: 1.5rem;
    font-weight: 500;
}

.alert-success {
    background: #d1fae5;
    color: #065f46;
    border: 1px solid #a7f3d0;
}

.alert-error {
    background: #fee2e2;
    color: #991b1b;
    border: 1px solid #fecaca;
}

/* === Responsive === */
@media (max-width: 1024px) {
    .sidebar {
        width: 220px;
    }
    .main {
        margin-left: 220px;
    }
}

@media (max-width: 768px) {
    body {
        flex-direction: column;
    }
    .sidebar {
        position: relative;
        width: 100%;
        height: auto;
        padding: 1rem;
    }
    .main {
        margin-left: 0;
        padding: 1rem;
    }
    .comment.reply {
        margin-left: 1rem;
    }
}

/* === Font Awesome icons === */
@import url('https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.0.0/css/all.min.css');

/* === Utility classes === */
.hidden {
    display: none !important;
}

.text-center {
    text-align: center;
}

.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }

.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }

.flex {
    display: flex;
}

.items-center {
    align-items: center;
}

.justify-between {
    justify-content: space-between;
}

.gap-2 {
    gap: 0.5rem;
}

.gap-3 {
    gap: 1rem;
}

.gap-4 {
    gap: 1.5rem;
}

/* === IT Hub inspired academic shell === */
:root {
    --clr-primary: #b300ff;
    --clr-primary-light: #e7c7ff;
    --clr-primary-dark: #8e00d4;
    --clr-accent: #78e85f;
    --clr-success: #16a34a;
    --clr-danger: #ef4444;
    --clr-warning: #f59e0b;
    --clr-bg: #f5f7fb;
    --clr-card: #ffffff;
    --clr-border: #e4e9f2;
    --clr-text-dark: #0f172a;
    --clr-text-light: #687386;
    --clr-text-lighter: #98a2b3;
    --clr-input: #f7f9fc;
    --clr-nav: #ffffff;
    --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.04);
    --shadow: 0 1px 2px rgba(15, 23, 42, 0.05);
    --shadow-md: 0 8px 24px rgba(15, 23, 42, 0.08);
    --shadow-lg: 0 18px 45px rgba(15, 23, 42, 0.12);
    --radius-sm: 0.375rem;
    --radius: 0.5rem;
    --radius-lg: 0.625rem;
    --radius-xl: 0.75rem;
    --topbar-height: 64px;
}

:root[data-theme="dark"] {
    --clr-primary: #b56ce8;
    --clr-primary-light: #38224b;
    --clr-primary-dark: #d9b8f2;
    --clr-accent: #6ea77b;
    --clr-success: #54a36c;
    --clr-danger: #d36b7a;
    --clr-warning: #d3a84c;
    --clr-bg: #0f172a;
    --clr-card: #182234;
    --clr-border: #2a3650;
    --clr-text-dark: #f8fafc;
    --clr-text-light: #b6c0d4;
    --clr-text-lighter: #8290a8;
    --clr-input: #111827;
    --clr-nav: #111827;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.25);
    --shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 12px 28px rgba(0, 0, 0, 0.34);
    --shadow-lg: 0 20px 48px rgba(0, 0, 0, 0.42);
}

html {
    background: var(--clr-bg);
}

body {
    background: var(--clr-bg);
    color: var(--clr-text-dark);
    font-family: Inter, "Segoe UI", Roboto, Arial, sans-serif;
    font-size: 15px;
    line-height: 1.5;
    letter-spacing: 0;
    padding-top: var(--topbar-height);
}

a {
    color: var(--clr-primary);
}

.sidebar {
    position: fixed;
    inset: 0 0 auto 0;
    width: 100%;
    height: var(--topbar-height);
    min-height: var(--topbar-height);
    padding: 0 32px;
    background: var(--clr-nav);
    color: var(--clr-text-dark);
    border-bottom: 1px solid var(--clr-border);
    box-shadow: var(--shadow-sm);
    display: flex;
    flex-direction: row;
    align-items: center;
    gap: 24px;
    overflow: visible;
}

.sidebar-header {
    width: auto;
    min-width: 88px;
    margin: 0;
    text-align: left;
    display: flex;
    align-items: center;
    gap: 10px;
}

.sidebar-header::before {
    content: "";
    width: 28px;
    height: 28px;
    display: block;
    background:
        linear-gradient(var(--clr-text-dark), var(--clr-text-dark)) 3px 3px / 6px 6px no-repeat,
        linear-gradient(var(--clr-text-dark), var(--clr-text-dark)) 19px 3px / 6px 6px no-repeat,
        linear-gradient(var(--clr-text-dark), var(--clr-text-dark)) 3px 19px / 6px 6px no-repeat,
        linear-gradient(var(--clr-text-dark), var(--clr-text-dark)) 19px 19px / 6px 6px no-repeat;
    opacity: 0.9;
}

.sidebar-header h2 {
    font-size: 11px;
    line-height: 1.05;
    font-weight: 800;
    letter-spacing: 0;
    margin: 0;
    max-width: 42px;
}

.sidebar-header h2 a,
.sidebar-header h2 a[style] {
    color: var(--clr-text-dark) !important;
}

.sidebar-header .subtitle,
.sidebar-section {
    display: none !important;
}

.sidebar-nav {
    display: flex;
    align-items: center;
    gap: 24px;
    flex: 1 1 auto;
    min-width: 0;
    overflow-x: auto;
    scrollbar-width: none;
    list-style: none;
}

.sidebar-nav::-webkit-scrollbar {
    display: none;
}

.sidebar-nav li {
    margin: 0;
    display: flex;
    align-items: center;
    gap: 16px;
    flex: 0 0 auto;
}

.sidebar-nav a {
    position: relative;
    color: var(--clr-text-dark);
    background: transparent;
    border-radius: 0;
    padding: 22px 0 18px;
    min-height: var(--topbar-height);
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 15px;
    font-weight: 600;
    white-space: nowrap;
    transition: color 0.15s ease;
}

.sidebar-nav a i {
    width: auto;
    font-size: 15px;
    color: var(--clr-text-light);
}

.sidebar-nav a:hover,
.sidebar-nav a.active {
    color: var(--clr-primary);
    background: transparent;
    transform: none;
}

.sidebar-nav a.active::after,
.sidebar-nav a:hover::after {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    bottom: 10px;
    height: 4px;
    border-radius: 999px;
    background: var(--clr-primary);
}

.nav-badge {
    margin-left: 0.35rem;
    min-width: 1.35rem;
    height: 1.35rem;
    padding: 0 0.4rem;
    border-radius: 999px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: var(--clr-danger);
    color: #fff;
    font-size: 0.72rem;
    font-weight: 800;
    line-height: 1;
}

.user-info {
    margin-left: auto;
    color: var(--clr-text-dark);
    font-size: 14px;
    line-height: 1.2;
    white-space: nowrap;
    display: flex;
    align-items: center;
    gap: 8px;
}

.user-info > div:first-child {
    display: none;
}

.user-info > div:last-child::after {
    content: "";
    width: 36px;
    height: 36px;
    margin-left: 12px;
    border-radius: 50%;
    display: inline-grid;
    place-items: center;
    background: #efd7ff;
    color: var(--clr-primary);
    vertical-align: middle;
}

:root[data-theme="dark"] .user-info > div:last-child::after {
    background: #352447;
    color: var(--clr-primary-dark);
}

.sidebar > div[sec\:authorize],
.sidebar > div[style*="display:flex"],
.sidebar > div[style*="display: flex"] {
    margin: 0 !important;
    flex: 0 0 auto;
}

.logout-btn,
.logout-btn[style] {
    margin: 0;
    padding: 0.45rem 0.7rem;
    min-height: 34px;
    background: transparent !important;
    color: var(--clr-text-dark);
    border: 1px solid var(--clr-border);
    border-radius: var(--radius);
    box-shadow: none;
    font-size: 0.84rem;
}

.logout-btn:hover {
    background: var(--clr-input) !important;
    color: var(--clr-primary);
    transform: none;
}

.theme-toggle {
    width: 36px;
    height: 36px;
    border: 1px solid var(--clr-border);
    border-radius: var(--radius);
    background: var(--clr-card);
    color: var(--clr-primary);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: background 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}

.theme-toggle:hover {
    background: var(--clr-input);
    border-color: var(--clr-primary);
}

body > .theme-toggle {
    position: fixed;
    top: 16px;
    right: 16px;
    z-index: 1200;
}

.main {
    margin-left: 0;
    padding: 24px;
    min-height: calc(100vh - var(--topbar-height));
}

.main,
.page-content,
.profile-page {
    max-width: 1240px;
    margin-right: auto;
    margin-left: auto;
}

.page-content {
    padding: 0;
}

.page-header {
    background: var(--clr-card);
    border: 1px solid var(--clr-border);
    border-radius: var(--radius-xl);
    padding: 22px 24px;
    margin-bottom: 18px;
    box-shadow: var(--shadow);
}

.page-header h1 {
    color: var(--clr-text-dark);
    font-size: 24px;
    line-height: 1.2;
    font-weight: 800;
    margin: 0;
}

.page-header .subtitle {
    color: var(--clr-text-light);
    margin-top: 8px;
}

.card,
.grid-card,
.post-card,
.comment-form-container,
.create-post-form,
.profile-card,
.profile-form,
.panel,
.chat-list-panel,
.chat-thread-panel,
.notification-card,
.stat-card,
.category-card,
.user-card,
.admin-card {
    background: var(--clr-card) !important;
    border: 1px solid var(--clr-border) !important;
    border-radius: var(--radius-xl) !important;
    box-shadow: var(--shadow) !important;
    color: var(--clr-text-dark);
}

.card,
.post-card,
.create-post-form,
.profile-form,
.profile-card,
.panel {
    padding: 24px;
}

.post-card:hover,
.grid-card:hover,
.activity-item:hover,
.chat-list-item:hover {
    transform: none;
    box-shadow: var(--shadow-md) !important;
}

.post-title,
.chat-thread-title,
.profile-name,
.section-title,
h1, h2, h3, h4 {
    color: var(--clr-text-dark);
    letter-spacing: 0;
}

.post-meta,
.chat-thread-subtitle,
.chat-list-subtitle,
.muted,
.activity-preview,
.activity-meta,
.summary-label {
    color: var(--clr-text-light);
}

.form-input,
.form-control,
.chat-textarea,
select,
input,
textarea {
    background: var(--clr-input) !important;
    color: var(--clr-text-dark) !important;
    border: 1px solid var(--clr-border) !important;
    border-radius: var(--radius) !important;
    box-shadow: none !important;
}

.form-input:focus,
.form-control:focus,
select:focus,
input:focus,
textarea:focus {
    outline: none;
    border-color: var(--clr-primary) !important;
    box-shadow: 0 0 0 3px color-mix(in srgb, var(--clr-primary), transparent 86%) !important;
}

.submit-btn,
.btn-primary,
button.submit-btn {
    background: var(--clr-primary) !important;
    color: #fff !important;
    border: 1px solid var(--clr-primary) !important;
    border-radius: var(--radius) !important;
    box-shadow: none !important;
    font-weight: 800;
}

.submit-btn:hover,
.btn-primary:hover {
    background: var(--clr-primary-dark) !important;
    transform: none;
}

.action-btn,
.reply-btn,
.btn,
.btn-secondary {
    background: var(--clr-card) !important;
    color: var(--clr-text-dark) !important;
    border: 1px solid var(--clr-border) !important;
    border-radius: var(--radius) !important;
    box-shadow: none !important;
    font-weight: 700;
}

.action-btn:hover,
.reply-btn:hover,
.btn:hover,
.btn-secondary:hover {
    color: var(--clr-primary) !important;
    border-color: var(--clr-primary) !important;
    background: var(--clr-input) !important;
    transform: none;
}

.post-content,
.comment,
.message-bubble,
.summary-card,
.activity-item,
.student-card,
.discipline-chip,
.soft-badge {
    background: var(--clr-card);
    border-color: var(--clr-border);
    color: var(--clr-text-dark);
}

.post-content {
    border-left: 0;
    padding: 0;
    background: transparent;
}

.tabs {
    border-bottom: 1px solid var(--clr-border);
}

.tab,
.tabs a {
    color: var(--clr-text-dark);
}

.tab.active,
.tabs a.active {
    color: var(--clr-primary);
    border-bottom-color: var(--clr-primary);
}

.alert,
.notification {
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

.chat-page {
    height: calc(100vh - var(--topbar-height) - 48px) !important;
}

.messages {
    background: var(--clr-bg) !important;
}

.message-row.own .message-bubble {
    background: color-mix(in srgb, var(--clr-primary), var(--clr-card) 88%) !important;
    border-color: color-mix(in srgb, var(--clr-primary), var(--clr-border) 70%) !important;
}

.chat-pinned-banner {
    background: color-mix(in srgb, var(--clr-primary), var(--clr-card) 92%) !important;
    border-bottom-color: var(--clr-border) !important;
}

.chat-pinned-label {
    color: var(--clr-primary) !important;
}

.data-table th,
.data-table tr:hover,
.list-item:hover {
    background: var(--clr-input);
}

.image-modal {
    background: rgba(2, 6, 23, 0.86);
}

@media (max-width: 1024px) {
    .sidebar {
        padding: 0 18px;
        gap: 16px;
    }

    .sidebar-nav {
        gap: 18px;
    }

    .main {
        padding: 18px;
    }
}

@media (max-width: 768px) {
    body {
        padding-top: 0;
    }

    .sidebar {
        position: sticky;
        top: 0;
        height: auto;
        min-height: 58px;
        padding: 0 14px;
        flex-wrap: wrap;
        align-content: center;
        gap: 10px 14px;
    }

    .sidebar-header {
        min-width: auto;
    }

    .sidebar-nav {
        order: 5;
        width: 100%;
        flex-basis: 100%;
        padding-bottom: 6px;
    }

    .sidebar-nav a {
        min-height: 38px;
        padding: 8px 0 12px;
        font-size: 14px;
    }

    .sidebar-nav a.active::after,
    .sidebar-nav a:hover::after {
        bottom: 3px;
    }

    .user-info {
        margin-left: auto;
        font-size: 13px;
        max-width: 140px;
        overflow: hidden;
        text-overflow: ellipsis;
    }

    .logout-btn {
        padding: 0.35rem 0.5rem;
        font-size: 0.78rem;
    }

    .theme-toggle {
        width: 34px;
        height: 34px;
    }

    .main {
        padding: 14px;
    }

    .page-header,
    .card,
    .post-card,
    .panel {
        padding: 16px;
    }

    .chat-page {
        height: auto !important;
    }
}

/* === Navigation and profile refinements === */
body {
    background: var(--clr-bg) !important;
}

.sidebar {
    gap: 18px;
}

.sidebar-nav {
    gap: 16px;
    padding: 0 2px;
}

.sidebar-nav a {
    gap: 6px;
    font-size: 14px;
}

.sidebar-nav a i {
    font-size: 14px;
}

.sidebar-nav li[sec\:authorize] {
    gap: 16px;
}

.current-user-link {
    color: var(--clr-text-dark);
    text-decoration: none;
    font-weight: 700;
}

.current-user-link:hover {
    color: var(--clr-primary);
}

.profile-page {
    max-width: 1240px !important;
    margin: 0 auto !important;
    padding: 24px !important;
}

.profile-page .top-actions {
    background: var(--clr-card) !important;
    border: 1px solid var(--clr-border) !important;
    border-radius: var(--radius-xl) !important;
    box-shadow: var(--shadow) !important;
    padding: 20px 24px !important;
    margin-bottom: 18px !important;
}

.profile-page .top-actions h1 {
    color: var(--clr-text-dark) !important;
    font-size: 24px !important;
    line-height: 1.2 !important;
}

.study-card-layout {
    grid-template-columns: 330px minmax(0, 1fr) !important;
    gap: 18px !important;
}

.profile-page .panel,
.profile-page .identity-panel {
    background: var(--clr-card) !important;
    color: var(--clr-text-dark) !important;
    border: 1px solid var(--clr-border) !important;
    border-radius: var(--radius-xl) !important;
    box-shadow: var(--shadow) !important;
    padding: 22px !important;
}

.profile-page .identity-panel {
    top: calc(var(--topbar-height) + 18px) !important;
}

.profile-page .avatar,
.profile-page .avatar-placeholder {
    width: 116px !important;
    height: 116px !important;
}

.profile-page .avatar-placeholder {
    background: color-mix(in srgb, var(--clr-primary), var(--clr-card) 88%) !important;
    color: var(--clr-primary) !important;
}

.profile-page .profile-name {
    color: var(--clr-text-dark) !important;
    font-size: 21px !important;
}

.profile-page .profile-username,
.profile-page .muted,
.profile-page .summary-label,
.profile-page .activity-preview,
.profile-page .activity-meta {
    color: var(--clr-text-light) !important;
}

.profile-page .section-title {
    color: var(--clr-text-dark) !important;
    font-size: 17px !important;
}

.profile-page .summary-card,
.profile-page .activity-item {
    background: var(--clr-input) !important;
    border: 1px solid var(--clr-border) !important;
    color: var(--clr-text-dark) !important;
    box-shadow: none !important;
}

.profile-page .activity-title {
    color: var(--clr-text-dark) !important;
}

.profile-page .summary-number {
    color: var(--clr-primary) !important;
}

.profile-page .soft-badge,
.profile-page .discipline-chip {
    background: color-mix(in srgb, var(--clr-primary), var(--clr-card) 90%) !important;
    border: 1px solid color-mix(in srgb, var(--clr-primary), var(--clr-border) 50%) !important;
    color: var(--clr-primary-dark) !important;
}

.profile-page .contact-item,
.profile-page .toggle-item {
    color: var(--clr-text-dark) !important;
}

@media (max-width: 1280px) {
    :root {
        --topbar-height: 92px;
    }

    .sidebar {
        height: var(--topbar-height);
        min-height: var(--topbar-height);
        flex-wrap: wrap;
        align-content: center;
        gap: 8px 16px;
        padding: 8px 18px;
    }

    .sidebar-nav {
        order: 5;
        flex-basis: 100%;
        width: 100%;
        overflow-x: auto;
    }

    .sidebar-nav a {
        min-height: 38px;
        padding: 8px 0 12px;
    }

    .sidebar-nav a.active::after,
    .sidebar-nav a:hover::after {
        bottom: 3px;
    }
}

@media (max-width: 900px) {
    .sidebar {
        position: sticky !important;
        height: auto !important;
        min-height: 58px !important;
    }

    .study-card-layout {
        grid-template-columns: 1fr !important;
    }

    .profile-page {
        padding: 14px !important;
    }

    .profile-page .identity-panel {
        position: static !important;
    }

    .profile-page .summary-grid,
    .profile-page .form-grid {
        grid-template-columns: 1fr !important;
    }
}

/* === Dark theme contrast fixes === */
:root[data-theme="dark"] {
    --clr-primary: #b56ce8;
    --clr-primary-light: #38224b;
    --clr-primary-dark: #d9b8f2;
    --clr-accent: #6ea77b;
    --clr-success: #54a36c;
    --clr-danger: #d36b7a;
    --clr-warning: #d3a84c;
    --clr-bg: #0b1220;
    --clr-card: #172235;
    --clr-border: #2f3b52;
    --clr-text-dark: #f8fafc;
    --clr-text-light: #cbd5e1;
    --clr-text-lighter: #94a3b8;
    --clr-input: #0f172a;
    --clr-nav: #111827;
}

:root[data-theme="dark"] body {
    background: var(--clr-bg) !important;
}

:root[data-theme="dark"] .main > div[style*="background: white"],
:root[data-theme="dark"] .reply-form-container,
:root[data-theme="dark"] .question-tools,
:root[data-theme="dark"] .empty-notifications,
:root[data-theme="dark"] .panel,
:root[data-theme="dark"] .profile-card,
:root[data-theme="dark"] .profile-form,
:root[data-theme="dark"] .category-card,
:root[data-theme="dark"] .stat-card,
:root[data-theme="dark"] .quick-actions,
:root[data-theme="dark"] .recent-users,
:root[data-theme="dark"] .action-card,
:root[data-theme="dark"] .activity-item,
:root[data-theme="dark"] .summary-card {
    background: var(--clr-card) !important;
    color: var(--clr-text-dark) !important;
    border-color: var(--clr-border) !important;
}

:root[data-theme="dark"] .notification-item,
:root[data-theme="dark"] .notification-item.unread {
    background: var(--clr-card) !important;
    border-color: var(--clr-border) !important;
    color: var(--clr-text-dark) !important;
}

:root[data-theme="dark"] .notification-title,
:root[data-theme="dark"] .notification-message,
:root[data-theme="dark"] .notification-meta,
:root[data-theme="dark"] .notification-item h1,
:root[data-theme="dark"] .notification-item h2,
:root[data-theme="dark"] .notification-item h3,
:root[data-theme="dark"] .notification-item a {
    color: var(--clr-text-dark) !important;
}

:root[data-theme="dark"] .notification-message,
:root[data-theme="dark"] .notification-meta {
    color: var(--clr-text-light) !important;
}

:root[data-theme="dark"] .message-bubble {
    background: #172235 !important;
    border-color: var(--clr-border) !important;
    color: var(--clr-text-dark) !important;
}

:root[data-theme="dark"] .message-row.own .message-bubble {
    background: #22314a !important;
    border-color: #40516e !important;
}

:root[data-theme="dark"] .message-author,
:root[data-theme="dark"] .message-content,
:root[data-theme="dark"] .message-time,
:root[data-theme="dark"] .message-bubble select,
:root[data-theme="dark"] .message-bubble option {
    color: var(--clr-text-dark) !important;
}

:root[data-theme="dark"] .message-bubble .reply-btn,
:root[data-theme="dark"] .message-bubble .action-btn,
:root[data-theme="dark"] .message-bubble .btn,
:root[data-theme="dark"] .message-bubble select {
    background: #111827 !important;
    color: #f8fafc !important;
    border-color: #1f2937 !important;
}

:root[data-theme="dark"] .comment.best-answer,
:root[data-theme="dark"] .best-answer {
    background: #132b24 !important;
    border-color: #2f6b51 !important;
    color: var(--clr-text-dark) !important;
}

:root[data-theme="dark"] .comment.best-answer *,
:root[data-theme="dark"] .best-answer * {
    color: var(--clr-text-dark) !important;
}

:root[data-theme="dark"] .best-answer .best-answer-badge,
:root[data-theme="dark"] .comment.best-answer .best-answer-badge {
    background: #2f6b51 !important;
    color: #e8fff2 !important;
}

:root[data-theme="dark"] .comment:not(.best-answer),
:root[data-theme="dark"] .activity-item,
:root[data-theme="dark"] .summary-card {
    background: #111c2e !important;
    color: var(--clr-text-dark) !important;
}

:root[data-theme="dark"] .comment:not(.best-answer) *,
:root[data-theme="dark"] .activity-item *,
:root[data-theme="dark"] .summary-card * {
    color: inherit;
}

:root[data-theme="dark"] .post-content,
:root[data-theme="dark"] .post-meta,
:root[data-theme="dark"] .post-stats,
:root[data-theme="dark"] .comment-time,
:root[data-theme="dark"] .chat-thread-subtitle,
:root[data-theme="dark"] .chat-list-subtitle {
    color: var(--clr-text-light) !important;
}

:root[data-theme="dark"] .post-title,
:root[data-theme="dark"] .comment-author,
:root[data-theme="dark"] .author-name,
:root[data-theme="dark"] .comment-content,
:root[data-theme="dark"] .chat-thread-title,
:root[data-theme="dark"] .chat-list-title {
    color: var(--clr-text-dark) !important;
}

:root[data-theme="dark"] .question-status.open {
    background: #24254a !important;
    color: #c9c7ff !important;
    border-color: #464781 !important;
}

:root[data-theme="dark"] .question-status.answered {
    background: #123044 !important;
    color: #a8d5e6 !important;
    border-color: #2d6077 !important;
}

:root[data-theme="dark"] .question-status.resolved {
    background: #132b24 !important;
    color: #bde8ca !important;
    border-color: #2f6b51 !important;
}

:root[data-theme="dark"] .question-status.needs-teacher {
    background: #382b16 !important;
    color: #ead29f !important;
    border-color: #6c5630 !important;
}

/* === Frontend system polish and mobile adaptation === */
:root {
    --content-max-width: 1240px;
    --content-padding: 24px;
    --control-height: 42px;
}

html {
    scroll-padding-top: calc(var(--topbar-height) + 20px);
}

body {
    overflow-x: hidden;
}

button,
input,
select,
textarea {
    font: inherit;
}

button,
a,
input,
select,
textarea {
    -webkit-tap-highlight-color: transparent;
}

:focus-visible {
    outline: 3px solid color-mix(in srgb, var(--clr-primary), transparent 68%);
    outline-offset: 2px;
}

.mobile-nav-toggle {
    display: none;
}

.main,
.page-content,
.profile-page,
.notifications-layout {
    width: min(100%, var(--content-max-width)) !important;
}

.main {
    padding: var(--content-padding) !important;
}

.page-header,
.notifications-header,
.top-actions {
    gap: 16px !important;
}

.page-header {
    display: flex !important;
    align-items: center !important;
    justify-content: space-between !important;
}

.page-header h1,
.notifications-title,
.profile-page .top-actions h1 {
    font-size: clamp(22px, 2vw, 30px) !important;
    line-height: 1.15 !important;
}

.card,
.grid-card,
.post-card,
.panel,
.chat-list-panel,
.chat-thread-panel,
.notification-item,
.comment-form-container,
.create-post-form,
.profile-form,
.profile-card {
    transition: border-color 0.16s ease, box-shadow 0.16s ease, background 0.16s ease;
}

.post-card,
.panel,
.card,
.notification-item,
.chat-list-panel,
.chat-thread-panel {
    overflow: hidden;
}

.post-header,
.post-actions,
.question-tools,
.form-actions,
.notification-actions,
.chat-start-form {
    min-width: 0;
}

.main > div[style*="background: white"],
.main > div[style*="background: #fff"],
.main > div[style*="background:#fff"] {
    background: var(--clr-card) !important;
    border: 1px solid var(--clr-border) !important;
    border-radius: var(--radius-xl) !important;
    box-shadow: var(--shadow) !important;
    color: var(--clr-text-dark) !important;
}

.main form[style*="display: flex"],
.main div[style*="display: flex"] {
    max-width: 100%;
}

.submit-btn,
.action-btn,
.reply-btn,
.btn,
.logout-btn,
.theme-toggle,
.mobile-nav-toggle,
button {
    min-height: 36px;
}

.submit-btn,
.action-btn,
.reply-btn,
.btn,
.btn-primary,
.btn-secondary,
.logout-btn {
    display: inline-flex !important;
    align-items: center !important;
    justify-content: center !important;
    gap: 8px !important;
    white-space: nowrap;
}

.form-input,
.form-control,
.chat-textarea,
select,
input,
textarea {
    min-height: var(--control-height);
    max-width: 100%;
}

textarea,
.chat-textarea,
.comment-input {
    line-height: 1.45;
}

.data-table {
    min-width: 760px;
}

.table-container,
.admin-table-container {
    overflow-x: auto;
    border-radius: var(--radius-xl);
}

.post-content,
.comment-content,
.activity-preview,
.notification-message,
.message-content {
    overflow-wrap: anywhere;
}

.post-actions,
.post-stats,
.question-tools,
.comment-actions {
    display: flex;
    flex-wrap: wrap;
}

.question-tools,
.post-actions {
    gap: 10px !important;
}

.comment {
    max-width: 100%;
}

.comment-depth-1,
.comment-depth-2,
.comment-depth-3,
.comment-depth-4 {
    margin-left: min(2rem, 5vw) !important;
}

.notifications-layout {
    display: grid;
    gap: 16px;
}

.notification-item {
    min-width: 0;
}

.chat-page {
    width: min(100%, var(--content-max-width));
    margin: 0 auto;
}

.message-bubble {
    min-width: 0;
}

.chat-textarea {
    width: 100%;
}

@media (max-width: 1100px) {
    :root {
        --content-padding: 18px;
    }

    .sidebar {
        gap: 12px;
    }

    .sidebar-nav {
        gap: 14px;
    }

    .sidebar-nav a {
        font-size: 13px;
    }
}

@media (max-width: 860px) {
    :root {
        --topbar-height: 64px;
        --content-padding: 14px;
    }

    body {
        padding-top: var(--topbar-height) !important;
    }

    body.nav-open {
        overflow: hidden;
    }

    .sidebar {
        position: fixed !important;
        top: 0 !important;
        left: 0 !important;
        right: 0 !important;
        height: var(--topbar-height) !important;
        min-height: var(--topbar-height) !important;
        padding: 0 12px !important;
        display: grid !important;
        grid-template-columns: auto 1fr auto auto auto;
        align-items: center !important;
        gap: 8px !important;
        overflow: visible !important;
        z-index: 1300;
    }

    .sidebar-header {
        min-width: 0 !important;
    }

    .sidebar-header h2 {
        max-width: none;
        font-size: 12px;
    }

    .mobile-nav-toggle {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        width: 38px;
        height: 38px;
        border: 1px solid var(--clr-border);
        border-radius: var(--radius);
        background: var(--clr-card);
        color: var(--clr-text-dark);
        cursor: pointer;
        justify-self: end;
    }

    .sidebar-nav {
        position: fixed;
        top: var(--topbar-height);
        left: 0;
        right: 0;
        bottom: 0;
        width: 100%;
        display: grid !important;
        align-content: start;
        gap: 4px !important;
        padding: 12px;
        background: var(--clr-nav);
        border-top: 1px solid var(--clr-border);
        overflow-y: auto;
        transform: translateY(-8px);
        opacity: 0;
        pointer-events: none;
        transition: opacity 0.16s ease, transform 0.16s ease;
        z-index: 1290;
    }

    body.nav-open .sidebar-nav {
        transform: translateY(0);
        opacity: 1;
        pointer-events: auto;
    }

    .sidebar-nav li,
    .sidebar-nav li[sec\:authorize] {
        display: grid;
        gap: 4px;
        width: 100%;
    }

    .sidebar-nav a {
        width: 100%;
        min-height: 44px;
        padding: 12px 14px !important;
        border-radius: var(--radius);
        font-size: 15px;
        color: var(--clr-text-dark);
    }

    .sidebar-nav a.active,
    .sidebar-nav a:hover {
        background: var(--clr-input);
    }

    .sidebar-nav a.active::after,
    .sidebar-nav a:hover::after {
        left: 14px;
        right: auto;
        bottom: 6px;
        width: 42px;
        height: 3px;
    }

    .user-info {
        max-width: 36vw !important;
        font-size: 13px !important;
        justify-self: end;
    }

    .user-info > div:last-child {
        overflow: hidden;
        text-overflow: ellipsis;
    }

    .user-info > div:last-child::after {
        width: 32px;
        height: 32px;
        margin-left: 8px;
    }

    .logout-btn {
        width: 38px;
        min-width: 38px;
        padding: 0 !important;
        font-size: 0;
    }

    .logout-btn i {
        font-size: 14px;
    }

    .theme-toggle {
        width: 38px;
        height: 38px;
    }

    .main,
    .profile-page {
        padding: var(--content-padding) !important;
    }

    .page-header,
    .notifications-header,
    .profile-page .top-actions {
        display: grid !important;
        grid-template-columns: 1fr;
        align-items: start !important;
        padding: 16px !important;
    }

    .page-header .submit-btn,
    .notifications-header form,
    .profile-page .top-actions .btn {
        width: 100%;
    }

    .main > div[style*="background: white"] form,
    .main > div[style*="background: #fff"] form {
        display: grid !important;
        grid-template-columns: 1fr;
    }

    .post-card,
    .panel,
    .card,
    .notification-item,
    .comment-form-container {
        padding: 16px !important;
        border-radius: var(--radius-lg) !important;
    }

    .post-header,
    .notification-item {
        display: grid !important;
        grid-template-columns: 1fr;
        gap: 12px !important;
    }

    .notification-actions {
        justify-content: stretch !important;
    }

    .notification-actions form,
    .notification-actions .submit-btn {
        width: 100%;
    }

    .post-stats {
        gap: 10px !important;
    }

    .stat-item {
        flex: 1 1 140px;
    }

    .question-tools form,
    .post-actions form,
    .comment-actions form {
        width: 100%;
    }

    .question-tools .action-btn,
    .post-actions .action-btn,
    .comment-actions .reply-btn,
    .comment-actions .action-btn,
    .question-tools select {
        width: 100% !important;
    }

    .comment-header,
    .comment-actions {
        display: grid !important;
        grid-template-columns: 1fr;
        justify-items: stretch;
    }

    .chat-page {
        height: auto !important;
        display: grid !important;
        grid-template-columns: 1fr !important;
        gap: 14px !important;
    }

    .chat-list-panel,
    .chat-thread-panel {
        min-height: auto;
    }

    .chat-list {
        max-height: 260px;
    }

    .messages {
        min-height: 360px;
        max-height: 58vh;
    }

    .message-bubble {
        max-width: calc(100vw - 82px) !important;
    }

    .message-meta,
    .message-actions,
    .message-bubble form {
        flex-wrap: wrap;
    }

    .chat-composer,
    .message-form {
        display: grid !important;
        grid-template-columns: 1fr !important;
        gap: 10px !important;
    }

    .chat-composer .submit-btn,
    .message-form .submit-btn {
        width: 100%;
    }
}

@media (max-width: 520px) {
    :root {
        --content-padding: 10px;
    }

    .sidebar {
        grid-template-columns: auto 1fr auto auto;
    }

    .sidebar-header::before {
        width: 24px;
        height: 24px;
        background:
            linear-gradient(var(--clr-text-dark), var(--clr-text-dark)) 2px 2px / 5px 5px no-repeat,
            linear-gradient(var(--clr-text-dark), var(--clr-text-dark)) 17px 2px / 5px 5px no-repeat,
            linear-gradient(var(--clr-text-dark), var(--clr-text-dark)) 2px 17px / 5px 5px no-repeat,
            linear-gradient(var(--clr-text-dark), var(--clr-text-dark)) 17px 17px / 5px 5px no-repeat;
    }

    .sidebar-header h2 {
        display: none;
    }

    .user-info {
        max-width: 30vw !important;
    }

    .current-user-link {
        display: inline-block;
        max-width: 100%;
        overflow: hidden;
        text-overflow: ellipsis;
        vertical-align: middle;
    }

    .page-header h1,
    .notifications-title,
    .profile-page .top-actions h1 {
        font-size: 22px !important;
    }

    .summary-grid,
    .form-grid {
        grid-template-columns: 1fr !important;
    }

    .comment-depth-1,
    .comment-depth-2,
    .comment-depth-3,
    .comment-depth-4 {
        margin-left: 0 !important;
    }

    .chat-list-header,
    .chat-thread-header {
        padding: 14px !important;
    }

    .messages {
        padding: 10px !important;
    }
}

/* === Global search in top navigation === */
.sidebar-search {
    position: relative;
    flex: 0 1 clamp(220px, 24vw, 360px);
    min-width: 190px;
    max-width: 380px;
    margin: 0;
    z-index: 1400;
}

.sidebar-search input {
    width: 100%;
    height: 40px;
    min-height: 40px;
    padding: 0 38px 0 42px;
    border: 1px solid color-mix(in srgb, var(--clr-border), var(--clr-primary) 10%);
    border-radius: 999px;
    background: color-mix(in srgb, var(--clr-card), var(--clr-input) 55%);
    color: var(--clr-text-dark);
    box-shadow: 0 10px 24px rgba(15, 23, 42, 0.05);
    transition: border-color 0.15s ease, box-shadow 0.15s ease, background 0.15s ease;
}

.sidebar-search input::placeholder {
    color: var(--clr-text-lighter);
}

.sidebar-search input:focus {
    border-color: var(--clr-primary);
    background: var(--clr-card);
    box-shadow: 0 0 0 4px color-mix(in srgb, var(--clr-primary), transparent 84%),
        0 14px 32px rgba(15, 23, 42, 0.08);
    outline: none;
}

.sidebar-search-icon {
    position: absolute;
    left: 16px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--clr-text-light);
    font-size: 14px;
    pointer-events: none;
}

.sidebar-search-dropdown {
    position: absolute;
    top: calc(100% + 10px);
    left: 0;
    right: 0;
    display: none;
    max-height: min(470px, calc(100vh - var(--topbar-height) - 28px));
    overflow-y: auto;
    background: var(--clr-card);
    border: 1px solid var(--clr-border);
    border-radius: 18px;
    box-shadow: var(--shadow-lg);
    padding: 8px;
}

.sidebar-search-dropdown.active {
    display: grid;
    gap: 4px;
}

.sidebar-search-item {
    display: grid;
    gap: 2px;
    padding: 10px 12px;
    border-radius: 12px;
    color: var(--clr-text-dark);
    text-decoration: none;
}

.sidebar-search-item:hover,
.sidebar-search-item:focus {
    background: color-mix(in srgb, var(--clr-primary), var(--clr-card) 91%);
    color: var(--clr-text-dark);
    outline: none;
}

.sidebar-search-type {
    width: fit-content;
    padding: 2px 8px;
    border-radius: 999px;
    background: color-mix(in srgb, var(--clr-primary), var(--clr-card) 86%);
    color: var(--clr-primary-dark);
    font-size: 11px;
    font-weight: 800;
    letter-spacing: 0.04em;
    text-transform: uppercase;
}

.sidebar-search-item strong {
    font-size: 14px;
    line-height: 1.25;
}

.sidebar-search-item small,
.sidebar-search-empty {
    color: var(--clr-text-light);
    font-size: 12px;
    line-height: 1.35;
}

.sidebar-search-empty {
    padding: 14px;
    text-align: center;
}

.sidebar:has(.sidebar-search) {
    gap: clamp(12px, 1.4vw, 22px);
}

.sidebar:has(.sidebar-search) .sidebar-header {
    flex: 0 0 auto;
}

.sidebar:has(.sidebar-search) .sidebar-nav {
    flex: 1 1 auto;
    justify-content: flex-start;
    gap: clamp(12px, 1.25vw, 22px);
}

.sidebar:has(.sidebar-search) .sidebar-nav a {
    font-size: clamp(12px, 0.84vw, 15px);
}

.sidebar:has(.sidebar-search) .user-info {
    margin-left: 0;
}

@media (max-width: 1500px) {
    .sidebar-search {
        flex-basis: clamp(200px, 20vw, 300px);
    }

    .sidebar:has(.sidebar-search) {
        padding-left: 20px;
        padding-right: 20px;
    }

    .sidebar:has(.sidebar-search) .sidebar-nav {
        gap: 14px;
    }

    .sidebar:has(.sidebar-search) .sidebar-nav a {
        gap: 6px;
    }
}

@media (max-width: 1280px) {
    .sidebar-search {
        order: 2;
        flex: 1 1 360px;
        max-width: none;
    }

    .mobile-nav-toggle {
        order: 3;
    }

    .user-info {
        order: 4;
    }

    .theme-toggle {
        order: 6;
    }
}

@media (max-width: 860px) {
    .sidebar-search {
        order: initial;
        grid-column: 2;
        min-width: 0;
        max-width: none;
        width: 100%;
    }

    .sidebar-search input {
        height: 38px;
        min-height: 38px;
    }

    .sidebar-search-dropdown {
        position: fixed;
        top: calc(var(--topbar-height) + 8px);
        left: 12px;
        right: 12px;
        max-height: 60vh;
    }
}

@media (max-width: 520px) {
    .sidebar-search {
        grid-column: 1 / -1;
        order: 10;
        display: none;
    }

    body.nav-open .sidebar-search {
        display: block;
    }
}

/* === Mobile usability pass === */
@media (max-width: 860px) {
    html,
    body {
        width: 100%;
        max-width: 100%;
        overflow-x: hidden;
    }

    body {
        padding-top: var(--topbar-height) !important;
        min-width: 0;
    }

    body.nav-open {
        overflow: hidden;
    }

    .sidebar {
        position: fixed !important;
        top: 0 !important;
        left: 0 !important;
        right: 0 !important;
        width: 100% !important;
        height: var(--topbar-height) !important;
        min-height: var(--topbar-height) !important;
        padding: 0 12px !important;
        display: grid !important;
        grid-template-columns: auto minmax(0, 1fr) auto auto;
        align-items: center !important;
        gap: 8px !important;
        overflow: visible !important;
        z-index: 1300;
    }

    .sidebar-header {
        order: 1;
        min-width: 0 !important;
        gap: 8px;
    }

    .sidebar-header h2 {
        display: block;
        max-width: 70px;
        font-size: 12px;
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
    }

    .sidebar-search {
        order: 2;
        grid-column: auto !important;
        width: 100%;
        min-width: 0;
        max-width: none;
    }

    .mobile-nav-toggle {
        order: 4;
        width: 42px;
        height: 42px;
        min-width: 42px;
        border-radius: 12px;
        box-shadow: var(--shadow-sm);
    }

    .theme-toggle {
        order: 3;
        width: 42px;
        height: 42px;
        min-width: 42px;
        border-radius: 12px;
    }

    .user-info {
        display: none !important;
    }

    .nav-account-actions {
        display: none !important;
    }

    body.nav-open .nav-account-actions {
        position: fixed;
        left: 12px;
        right: 12px;
        bottom: max(12px, env(safe-area-inset-bottom));
        display: grid !important;
        grid-template-columns: 1fr 1fr;
        gap: 10px !important;
        z-index: 1320;
    }

    body.nav-open .nav-account-actions form,
    body.nav-open .nav-account-actions .logout-btn {
        width: 100%;
    }

    .sidebar > div[style*="display:flex"],
    .sidebar > div[style*="display: flex"] {
        display: none !important;
    }

    body.nav-open .sidebar > div[style*="display:flex"],
    body.nav-open .sidebar > div[style*="display: flex"] {
        position: fixed;
        left: 12px;
        right: 12px;
        bottom: max(12px, env(safe-area-inset-bottom));
        display: grid !important;
        grid-template-columns: 1fr 1fr;
        gap: 10px !important;
        z-index: 1320;
    }

    body.nav-open .logout-btn,
    body.nav-open .logout-btn[style] {
        width: 100% !important;
        min-width: 0;
        min-height: 44px;
        padding: 0 12px !important;
        font-size: 14px !important;
        background: var(--clr-card) !important;
        color: var(--clr-text-dark) !important;
        border: 1px solid var(--clr-border) !important;
    }

    body.nav-open .logout-btn i {
        font-size: 14px;
    }

    .sidebar-nav {
        position: fixed !important;
        top: var(--topbar-height) !important;
        left: 0 !important;
        right: 0 !important;
        bottom: 0 !important;
        width: 100% !important;
        display: grid !important;
        align-content: start;
        gap: 6px !important;
        padding: 12px 12px 92px !important;
        background: var(--clr-nav);
        border-top: 1px solid var(--clr-border);
        box-shadow: 0 22px 50px rgba(15, 23, 42, 0.14);
        overflow-y: auto !important;
        transform: translateY(-10px);
        opacity: 0;
        pointer-events: none;
        transition: opacity 0.16s ease, transform 0.16s ease;
        z-index: 1290;
    }

    body.nav-open .sidebar-nav {
        transform: translateY(0);
        opacity: 1;
        pointer-events: auto;
    }

    .sidebar-nav li,
    .sidebar-nav li[sec\:authorize] {
        display: grid !important;
        gap: 6px !important;
        width: 100%;
    }

    .sidebar-nav a {
        width: 100% !important;
        min-height: 46px !important;
        padding: 12px 14px !important;
        border-radius: 12px !important;
        font-size: 15px !important;
        color: var(--clr-text-dark) !important;
        background: transparent;
    }

    .sidebar-nav a.active,
    .sidebar-nav a:hover {
        background: color-mix(in srgb, var(--clr-primary), var(--clr-card) 91%) !important;
    }

    .sidebar-nav a.active::after,
    .sidebar-nav a:hover::after {
        display: none;
    }

    .main,
    .page-content,
    .chat-page,
    .profile-page,
    .notifications-layout {
        width: 100% !important;
        max-width: 100% !important;
        margin-left: 0 !important;
    }

    .main,
    .page-content {
        padding: 14px !important;
    }

    .page-header,
    .notifications-header,
    .profile-page .top-actions {
        display: grid !important;
        grid-template-columns: 1fr !important;
        gap: 12px !important;
        align-items: start !important;
        margin-bottom: 14px !important;
        padding: 16px !important;
        border-radius: var(--radius-xl);
        background: var(--clr-card);
        border: 1px solid var(--clr-border);
        box-shadow: var(--shadow-sm);
    }

    .page-header h1,
    .create-post-form h1,
    .notifications-title,
    .profile-page .top-actions h1 {
        font-size: 24px !important;
        line-height: 1.18 !important;
    }

    .page-header .submit-btn,
    .page-header .btn,
    .notifications-header form,
    .profile-page .top-actions .btn {
        width: 100% !important;
    }

    .card,
    .post-card,
    .create-post-form,
    .comment-form-container,
    .category-card,
    .chat-list-panel,
    .chat-thread-panel,
    .notification-item,
    .profile-card,
    .profile-form,
    .panel {
        width: 100% !important;
        padding: 16px !important;
        border-radius: 14px !important;
        box-shadow: var(--shadow-sm) !important;
    }

    .post-title {
        font-size: 24px !important;
        line-height: 1.2 !important;
    }

    .post-meta,
    .post-stats {
        gap: 8px !important;
        flex-wrap: wrap;
    }

    .post-content {
        padding: 0;
        background: transparent;
        border-left: 0;
        font-size: 16px;
    }

    .main > div[style*="background: white"] {
        padding: 14px !important;
        margin-bottom: 14px !important;
    }

    .main > div[style*="background: white"] form,
    .main > div[style*="background: #fff"] form,
    .form-actions,
    .form-footer,
    .question-tools form,
    .post-actions,
    .post-actions form,
    .comment-actions,
    .comment-actions form {
        display: grid !important;
        grid-template-columns: 1fr !important;
        gap: 10px !important;
        width: 100%;
    }

    .submit-btn,
    .action-btn,
    .reply-btn,
    .cancel-btn,
    .btn {
        width: 100%;
        min-height: 44px;
        padding: 0 14px !important;
        font-size: 15px;
        white-space: normal !important;
        text-align: center;
    }

    .form-input,
    .form-control,
    input,
    select,
    textarea {
        width: 100%;
        min-width: 0;
        font-size: 16px !important;
    }

    textarea.form-input,
    .comment-input {
        min-height: 180px;
    }

    .categories-grid,
    .grid,
    .summary-grid,
    .form-grid {
        grid-template-columns: 1fr !important;
        gap: 14px !important;
        margin-top: 14px !important;
    }

    .category-actions {
        display: grid !important;
        grid-template-columns: 1fr auto;
        gap: 10px !important;
    }

    .category-actions .action-btn {
        width: 48px;
        min-width: 48px;
        padding: 0 !important;
    }

    .comment-header {
        align-items: start;
    }

    .comment.reply,
    .comment-depth-1,
    .comment-depth-2,
    .comment-depth-3,
    .comment-depth-4 {
        margin-left: 0 !important;
    }

    .attachment-preview-comment {
        margin-left: 0;
        max-width: 100%;
    }

    .chat-page {
        height: auto !important;
        display: grid !important;
        grid-template-columns: 1fr !important;
        gap: 14px !important;
    }

    .chat-list-panel,
    .chat-thread-panel {
        min-height: 0 !important;
        overflow: hidden;
    }

    .chat-list {
        max-height: 280px;
    }

    .chat-list-heading,
    .chat-thread-header,
    .chat-pinned-banner {
        display: grid !important;
        grid-template-columns: 1fr !important;
        align-items: start !important;
    }

    .chat-start-form,
    .chat-search-bar form,
    .chat-compose form {
        display: grid !important;
        grid-template-columns: 1fr !important;
        gap: 10px !important;
    }

    .messages {
        min-height: 380px !important;
        max-height: 62vh !important;
        padding: 12px !important;
    }

    .message-row {
        gap: 8px;
        align-items: flex-end;
    }

    .message-bubble {
        max-width: calc(100vw - 76px) !important;
        padding: 12px !important;
        border-radius: 16px 16px 16px 6px;
    }

    .message-row.own .message-bubble {
        background: linear-gradient(135deg, var(--clr-primary), #65518f) !important;
        color: #fff !important;
    }

    .message-actions,
    .message-bubble form {
        display: grid !important;
        grid-template-columns: 1fr !important;
        gap: 8px !important;
        opacity: 1 !important;
        transform: none !important;
    }

    .message-actions select,
    .message-actions button,
    .message-actions .chat-action-btn {
        width: 100% !important;
    }

    .chat-compose {
        padding: 12px !important;
    }

    .chat-attach-btn,
    .chat-send-btn {
        width: 100%;
        height: 46px;
    }

    .chat-compose-hint {
        display: none;
    }
}

@media (max-width: 520px) {
    :root {
        --topbar-height: 58px;
        --content-padding: 10px;
    }

    .sidebar {
        grid-template-columns: auto minmax(0, 1fr) auto auto;
        padding: 0 10px !important;
    }

    .sidebar-header h2 {
        display: none;
    }

    .sidebar-search {
        display: none !important;
        position: fixed;
        top: calc(var(--topbar-height) + 10px);
        left: 10px;
        right: 10px;
        z-index: 1320;
    }

    body.nav-open .sidebar-search {
        display: block !important;
    }

    .sidebar-search-dropdown {
        left: 0 !important;
        right: 0 !important;
        top: calc(100% + 8px) !important;
    }

    .sidebar-nav {
        padding-top: 70px !important;
    }

    .main,
    .page-content {
        padding: 10px !important;
    }

    .page-header h1,
    .create-post-form h1,
    .notifications-title,
    .profile-page .top-actions h1 {
        font-size: 22px !important;
    }

    .post-card,
    .create-post-form,
    .comment-form-container,
    .category-card,
    .chat-list-panel,
    .chat-thread-panel,
    .card,
    .panel {
        padding: 14px !important;
    }

    .post-title {
        font-size: 21px !important;
    }

    .post-stats {
        display: grid !important;
        grid-template-columns: 1fr !important;
    }

    .messages {
        max-height: 66vh !important;
    }

    .message-bubble {
        max-width: calc(100vw - 58px) !important;
    }
}

/* === Stable 1.0.4 dark color repair === */
.question-status {
    display: inline-flex;
    align-items: center;
    gap: 0.45rem;
    min-height: 28px;
    padding: 0 0.7rem;
    border: 1px solid transparent;
    border-radius: 999px;
    font-size: 0.82rem;
    font-weight: 800;
    line-height: 1;
    white-space: nowrap;
}

.question-status i {
    font-size: 0.55rem;
}

.question-status.open {
    background: #eef2ff;
    color: #3730a3;
    border-color: #c7d2fe;
}

.question-status.open i {
    color: #4f46e5;
}

.question-status.answered {
    background: #e7f6f2;
    color: #11645b;
    border-color: #b8ddd5;
}

.question-status.answered i {
    color: #2f8f83;
}

.question-status.resolved {
    background: #e9f7ee;
    color: #22623a;
    border-color: #bfe4cb;
}

.question-status.resolved i {
    color: #3f8d58;
}

.question-status.needs-teacher {
    background: #fff4e5;
    color: #8a4b12;
    border-color: #f2d2a2;
}

.question-status.needs-teacher i {
    color: #c98224;
}

.comment.best-answer {
    background: color-mix(in srgb, var(--clr-success), var(--clr-card) 94%) !important;
    border-color: color-mix(in srgb, var(--clr-success), var(--clr-border) 70%) !important;
    border-left: 4px solid color-mix(in srgb, var(--clr-success), #2f6b51 20%) !important;
    box-shadow: none !important;
}

.best-answer-badge {
    width: fit-content;
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    min-height: 28px;
    margin: 0.15rem 0 0.65rem;
    padding: 0 0.7rem;
    border-radius: 999px;
    background: color-mix(in srgb, var(--clr-success), var(--clr-card) 82%);
    color: color-mix(in srgb, var(--clr-success), #0f172a 42%);
    border: 1px solid color-mix(in srgb, var(--clr-success), var(--clr-border) 55%);
    font-size: 0.82rem;
    font-weight: 800;
}

:root[data-theme="dark"] .question-status.open {
    background: #222844 !important;
    color: #c8cef8 !important;
    border-color: #3b456b !important;
}

:root[data-theme="dark"] .question-status.open i {
    color: #8793df !important;
}

:root[data-theme="dark"] .question-status.answered {
    background: #17312f !important;
    color: #acd8d1 !important;
    border-color: #315d58 !important;
}

:root[data-theme="dark"] .question-status.answered i {
    color: #6eb4aa !important;
}

:root[data-theme="dark"] .question-status.resolved {
    background: #172d22 !important;
    color: #b8dbc4 !important;
    border-color: #315942 !important;
}

:root[data-theme="dark"] .question-status.resolved i {
    color: #7ab38b !important;
}

:root[data-theme="dark"] .question-status.needs-teacher {
    background: #332918 !important;
    color: #e0c99b !important;
    border-color: #5c4b2d !important;
}

:root[data-theme="dark"] .question-status.needs-teacher i {
    color: #c6a35f !important;
}

:root[data-theme="dark"] .comment.best-answer,
:root[data-theme="dark"] .comment.reply.best-answer {
    background: #15243a !important;
    color: var(--clr-text-dark) !important;
    border-color: #345047 !important;
    border-left: 4px solid #5f9478 !important;
    box-shadow: none !important;
}

:root[data-theme="dark"] .comment.best-answer *,
:root[data-theme="dark"] .comment.reply.best-answer * {
    color: inherit;
}

:root[data-theme="dark"] .comment.best-answer .author-name,
:root[data-theme="dark"] .comment.best-answer .comment-content,
:root[data-theme="dark"] .comment.reply.best-answer .author-name,
:root[data-theme="dark"] .comment.reply.best-answer .comment-content {
    color: var(--clr-text-dark) !important;
}

:root[data-theme="dark"] .comment.best-answer .comment-time,
:root[data-theme="dark"] .comment.reply.best-answer .comment-time {
    color: var(--clr-text-light) !important;
}

:root[data-theme="dark"] .best-answer-badge,
:root[data-theme="dark"] .comment.best-answer .best-answer-badge {
    background: #203a31 !important;
    color: #c7ead6 !important;
    border-color: #3f705a !important;
}

:root[data-theme="dark"] .chat-list-panel,
:root[data-theme="dark"] .chat-thread-panel {
    background: var(--clr-card) !important;
    border-color: var(--clr-border) !important;
    box-shadow: var(--shadow-md) !important;
}

:root[data-theme="dark"] .chat-list-header,
:root[data-theme="dark"] .chat-thread-header,
:root[data-theme="dark"] .chat-search-bar,
:root[data-theme="dark"] .chat-compose,
:root[data-theme="dark"] .reply-compose,
:root[data-theme="dark"] .typing-indicator {
    background: #151f31 !important;
    border-color: var(--clr-border) !important;
    color: var(--clr-text-dark) !important;
}

:root[data-theme="dark"] .chat-list {
    background: #121b2b !important;
}

:root[data-theme="dark"] .chat-list-item:hover,
:root[data-theme="dark"] .chat-list-item.active {
    background: #19263a !important;
    border-color: #3a4a66 !important;
    box-shadow: none !important;
}

:root[data-theme="dark"] .messages {
    background:
        radial-gradient(circle at 0 0, rgba(181, 108, 232, 0.08), transparent 28rem),
        linear-gradient(180deg, #0d1524, #101a2b) !important;
}

:root[data-theme="dark"] .message-bubble {
    background: #182438 !important;
    border-color: #31405a !important;
    color: var(--clr-text-dark) !important;
    box-shadow: none !important;
}

:root[data-theme="dark"] .message-row.own .message-bubble {
    background: #22304a !important;
    border-color: #465879 !important;
    color: var(--clr-text-dark) !important;
}

:root[data-theme="dark"] .message-row.own .message-content,
:root[data-theme="dark"] .message-row.own .message-author,
:root[data-theme="dark"] .message-row.own .message-meta,
:root[data-theme="dark"] .message-row.own .message-read-state {
    color: var(--clr-text-dark) !important;
}

:root[data-theme="dark"] .message-author,
:root[data-theme="dark"] .message-content {
    color: var(--clr-text-dark) !important;
}

:root[data-theme="dark"] .message-meta,
:root[data-theme="dark"] .message-read-state,
:root[data-theme="dark"] .chat-compose-hint {
    color: var(--clr-text-light) !important;
}

:root[data-theme="dark"] .chat-pinned-banner {
    background: #25213a !important;
    border-color: #4a426f !important;
    color: var(--clr-text-dark) !important;
}

:root[data-theme="dark"] .chat-pinned-label {
    color: #d6b8ef !important;
}

:root[data-theme="dark"] .chat-pinned-preview {
    color: var(--clr-text-dark) !important;
}

:root[data-theme="dark"] .chat-avatar,
:root[data-theme="dark"] .message-avatar,
:root[data-theme="dark"] .chat-thread-avatar {
    background: linear-gradient(135deg, #9c6ad0, #7357b6) !important;
}

:root[data-theme="dark"] .chat-unread-badge,
:root[data-theme="dark"] .chat-send-btn,
:root[data-theme="dark"] .submit-btn.chat-send-btn {
    background: #9b67d0 !important;
    color: #fff !important;
    border-color: #9b67d0 !important;
}

:root[data-theme="dark"] .chat-attach-btn,
:root[data-theme="dark"] .chat-action-btn,
:root[data-theme="dark"] .reply-btn.chat-action-btn {
    background: #111a2b !important;
    color: var(--clr-text-dark) !important;
    border-color: var(--clr-border) !important;
}

:root[data-theme="dark"] .chat-attach-btn:hover,
:root[data-theme="dark"] .chat-action-btn:hover,
:root[data-theme="dark"] .reply-btn.chat-action-btn:hover {
    background: #1b2940 !important;
    color: #d9b8f2 !important;
    border-color: #4c5d7c !important;
}

/* === Stable 1.0.4 app surfaces === */
.sidebar-header h2 a {
    color: var(--clr-text-dark) !important;
    text-decoration: none !important;
}

.nav-account-actions {
    display: flex;
    gap: 0.5rem;
    margin: 0;
}

.nav-account-actions form {
    margin: 0;
}

.page-subtitle,
.muted {
    color: var(--clr-text-light);
}

.text-link {
    color: var(--clr-primary);
    text-decoration: none;
    font-weight: 700;
}

.text-link:hover {
    text-decoration: underline;
}

.dashboard-page,
.posts-page,
.post-detail-page,
.search-page {
    max-width: 1320px;
    margin-left: auto;
    margin-right: auto;
}

.dashboard-hero {
    display: grid;
    grid-template-columns: minmax(0, 1.15fr) minmax(320px, 0.85fr);
    gap: 1.5rem;
    align-items: stretch;
    padding: clamp(1.25rem, 3vw, 2.5rem);
    background:
        linear-gradient(135deg, color-mix(in srgb, var(--clr-primary), white 88%), transparent 62%),
        var(--clr-card);
    border: 1px solid var(--clr-border);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    margin-bottom: 1.5rem;
}

.dashboard-hero h1 {
    font-size: clamp(2rem, 4vw, 3.4rem);
    line-height: 1.05;
    margin-bottom: 0.85rem;
    color: var(--clr-text-dark);
}

.dashboard-hero p {
    max-width: 720px;
    color: var(--clr-text-light);
    font-size: 1.08rem;
}

.hero-actions,
.panel-header,
.post-card-topline,
.detail-actions {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.hero-actions {
    margin-top: 1.5rem;
}

.dashboard-summary {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.75rem;
}

.dashboard-summary > div {
    padding: 1rem;
    background: color-mix(in srgb, var(--clr-card), var(--clr-primary) 4%);
    border: 1px solid var(--clr-border);
    border-radius: var(--radius-lg);
}

.dashboard-summary strong {
    display: block;
    font-size: 1.75rem;
    line-height: 1;
    color: var(--clr-primary);
}

.dashboard-summary span {
    display: block;
    color: var(--clr-text-light);
    font-size: 0.86rem;
    margin-top: 0.35rem;
}

.dashboard-grid {
    display: grid;
    grid-template-columns: minmax(0, 1.4fr) minmax(280px, 0.6fr);
    gap: 1rem;
}

.panel {
    background: var(--clr-card);
    border: 1px solid var(--clr-border);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-sm);
    padding: 1.25rem;
}

.panel-large {
    grid-row: span 2;
}

.panel-header {
    justify-content: space-between;
    margin-bottom: 1rem;
}

.panel h2,
.panel-header h2 {
    margin: 0;
    color: var(--clr-text-dark);
    font-size: 1.15rem;
}

.feed-list,
.mini-list,
.category-rail {
    display: grid;
    gap: 0.7rem;
}

.feed-row,
.mini-list a,
.category-chip,
.quick-action,
.result-item {
    color: inherit;
    text-decoration: none;
    border: 1px solid var(--clr-border);
    border-radius: var(--radius-lg);
    background: var(--clr-card);
    transition: border-color 0.15s ease, background 0.15s ease, transform 0.15s ease;
}

.feed-row {
    display: grid;
    grid-template-columns: auto minmax(0, 1fr) auto;
    align-items: center;
    gap: 0.8rem;
    padding: 0.9rem;
}

.feed-row:hover,
.mini-list a:hover,
.category-chip:hover,
.quick-action:hover,
.result-item:hover {
    border-color: color-mix(in srgb, var(--clr-primary), var(--clr-border) 55%);
    background: color-mix(in srgb, var(--clr-primary), var(--clr-card) 96%);
    transform: translateY(-1px);
}

.feed-title {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    font-weight: 800;
}

.feed-meta,
.post-excerpt {
    color: var(--clr-text-light);
}

.quick-panel {
    display: grid;
    gap: 0.7rem;
    align-content: start;
}

.quick-action {
    display: flex;
    align-items: center;
    gap: 0.65rem;
    padding: 0.85rem 0.9rem;
    font-weight: 800;
}

.category-chip {
    display: grid;
    gap: 0.25rem;
    padding: 0.9rem;
}

.category-chip span {
    color: var(--clr-text-light);
    font-size: 0.88rem;
}

.mini-list a {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
    padding: 0.85rem 0.9rem;
    font-weight: 700;
}

.mini-list small {
    color: var(--clr-text-light);
    white-space: nowrap;
}

.forum-header {
    background: var(--clr-card);
    border: 1px solid var(--clr-border);
    border-radius: var(--radius-xl);
    padding: 1.25rem;
    box-shadow: var(--shadow-sm);
}

.forum-layout {
    display: grid;
    grid-template-columns: 300px minmax(0, 1fr);
    gap: 1rem;
    align-items: start;
}

.forum-filters {
    position: sticky;
    top: calc(var(--topbar-height) + 1rem);
}

.filter-form,
.filter-categories {
    display: grid;
    gap: 0.85rem;
}

.filter-form label {
    display: grid;
    gap: 0.35rem;
    color: var(--clr-text-light);
    font-weight: 700;
    font-size: 0.86rem;
}

.reset-filter {
    justify-content: center;
}

.filter-categories {
    margin-top: 1.25rem;
    padding-top: 1.25rem;
    border-top: 1px solid var(--clr-border);
}

.filter-categories a {
    color: var(--clr-text-dark);
    text-decoration: none;
    padding: 0.65rem 0.75rem;
    border-radius: var(--radius);
    font-weight: 700;
}

.filter-categories a.active,
.filter-categories a:hover {
    background: color-mix(in srgb, var(--clr-primary), var(--clr-card) 90%);
    color: var(--clr-primary);
}

.post-feed {
    display: grid;
    gap: 1rem;
}

.compact-post-card {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 150px;
    gap: 1rem;
    align-items: start;
    padding: 1.25rem;
}

.compact-post-card:hover {
    transform: none;
}

.post-title a {
    color: var(--clr-text-dark);
    text-decoration: none;
}

.post-title a:hover {
    color: var(--clr-primary);
}

.post-card-topline {
    margin-bottom: 0.6rem;
}

.category-label {
    display: inline-flex;
    align-items: center;
    min-height: 28px;
    padding: 0 0.65rem;
    border-radius: 999px;
    background: color-mix(in srgb, var(--clr-accent), var(--clr-card) 80%);
    color: var(--clr-text-dark);
    font-size: 0.78rem;
    font-weight: 800;
}

.post-excerpt {
    margin: 0.55rem 0 0.9rem;
}

.post-card-stats {
    display: grid;
    gap: 0.6rem;
    justify-items: stretch;
}

.post-card-stats > span {
    display: flex;
    justify-content: space-between;
    gap: 0.75rem;
    padding: 0.5rem 0.65rem;
    background: var(--clr-bg);
    border-radius: var(--radius);
    color: var(--clr-text-light);
}

.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 0.85rem;
    padding: 0.5rem;
}

.pagination a,
.pagination span {
    display: inline-flex;
    min-height: 42px;
    align-items: center;
    gap: 0.5rem;
    padding: 0 1rem;
    border-radius: var(--radius);
    border: 1px solid var(--clr-border);
    text-decoration: none;
    color: var(--clr-text-dark);
    background: var(--clr-card);
    font-weight: 800;
}

.pagination a.disabled {
    pointer-events: none;
    opacity: 0.45;
}

.back-link {
    display: inline-flex;
    gap: 0.45rem;
    align-items: center;
    margin-bottom: 1rem;
}

.post-detail-card {
    box-shadow: var(--shadow-sm);
}

.post-detail-header h1 {
    margin: 0 0 0.85rem;
    font-size: clamp(1.8rem, 4vw, 3rem);
    line-height: 1.12;
}

.comments-section.panel {
    margin-top: 1rem;
}

.badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 2rem;
    min-height: 2rem;
    padding: 0 0.65rem;
    border-radius: 999px;
    background: var(--clr-primary);
    color: white;
    font-weight: 800;
}

.reply-list {
    display: grid;
    gap: 0.8rem;
    margin-top: 0.8rem;
}

.search-hero {
    display: grid;
    gap: 0.9rem;
    margin-bottom: 1rem;
}

.search-hero h1 {
    margin: 0;
    font-size: clamp(1.8rem, 4vw, 2.8rem);
}

.search-form {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 0.75rem;
}

.search-results-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1rem;
}

.result-section {
    display: grid;
    gap: 0.75rem;
}

.result-item {
    display: grid;
    gap: 0.25rem;
    padding: 0.9rem;
}

.result-kicker {
    color: var(--clr-primary);
    font-size: 0.75rem;
    font-weight: 900;
    text-transform: uppercase;
}

.result-item small {
    color: var(--clr-text-light);
}

.empty-state.compact {
    padding: 1.4rem;
}

@media (max-width: 980px) {
    .dashboard-hero,
    .dashboard-grid,
    .forum-layout,
    .search-results-grid {
        grid-template-columns: 1fr;
    }

    .forum-filters {
        position: static;
    }

    .compact-post-card {
        grid-template-columns: 1fr;
    }

    .post-card-stats {
        grid-template-columns: repeat(4, minmax(0, 1fr));
    }
}

@media (max-width: 640px) {
    .dashboard-summary,
    .post-card-stats,
    .search-form {
        grid-template-columns: 1fr;
    }

    .dashboard-hero,
    .panel,
    .forum-header,
    .compact-post-card,
    .post-detail-card {
        padding: 1rem !important;
        border-radius: 14px !important;
    }

    .hero-actions,
    .detail-actions,
    .post-actions,
    .question-tools form,
    .form-footer {
        display: grid !important;
        grid-template-columns: 1fr !important;
        width: 100%;
    }

    .feed-row {
        grid-template-columns: 1fr;
        align-items: start;
    }

    .feed-title {
        white-space: normal;
    }

    .pagination {
        display: grid;
        grid-template-columns: 1fr;
    }

    .pagination a,
    .pagination span,
    .search-form .submit-btn {
        width: 100%;
        justify-content: center;
    }
}
:root {
    --clr-primary: #6d4aff;
    --clr-primary-soft: #f1ecff;
    --clr-primary-soft-strong: #e6deff;
    --clr-primary-dark: #4b32b3;
    --clr-primary-muted: #8e7fe0;
    --clr-accent: #f59e0b;
    --clr-success: #16a34a;
    --clr-danger: #dc2626;
    --clr-warning: #d97706;
    --clr-info: #2563eb;
    --clr-bg: #f5f7fb;
    --clr-card: #ffffff;
    --clr-card-muted: #fafbff;
    --clr-border: #dde3ee;
    --clr-border-strong: #c9d4e5;
    --clr-text-dark: #1e293b;
    --clr-text-light: #64748b;
    --clr-text-lighter: #94a3b8;
    --shadow-sm: 0 10px 24px rgba(15, 23, 42, 0.05);
    --shadow: 0 18px 46px rgba(15, 23, 42, 0.07);
    --shadow-lg: 0 28px 64px rgba(15, 23, 42, 0.12);
    --radius-sm: 10px;
    --radius: 14px;
    --radius-lg: 20px;
    --radius-xl: 28px;
    --container-width: 1180px;
    --form-width: 800px;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    background:
        radial-gradient(circle at top left, rgba(109, 74, 255, 0.08), transparent 22rem),
        linear-gradient(180deg, #f8faff 0%, #f5f7fb 100%);
    color: var(--clr-text-dark);
    font-family: "Segoe UI", Inter, Arial, sans-serif;
    line-height: 1.6;
}

a {
    color: inherit;
}

h1,
h2,
h3 {
    letter-spacing: -0.02em;
    color: var(--clr-text-dark);
}

h1 {
    font-size: clamp(2rem, 3vw, 2.7rem);
    font-weight: 700;
    line-height: 1.1;
}

h2 {
    font-size: clamp(1.35rem, 2vw, 1.75rem);
    font-weight: 600;
    line-height: 1.2;
}

h3 {
    font-size: 1.08rem;
    font-weight: 600;
    line-height: 1.35;
}

p,
span,
label,
input,
textarea,
select,
button {
    font-weight: 400;
}

.sidebar {
    position: sticky;
    top: 0;
    left: auto;
    width: 100%;
    height: auto;
    padding: 0;
    background: rgba(245, 247, 251, 0.92);
    color: var(--clr-text-dark);
    box-shadow: none;
    border-bottom: 1px solid rgba(221, 227, 238, 0.9);
    backdrop-filter: blur(16px);
    z-index: 1000;
    overflow: visible;
}

.app-nav-inner {
    max-width: calc(var(--container-width) + 48px);
    margin: 0 auto;
    padding: 18px 24px;
    display: flex;
    align-items: center;
    gap: 20px;
}

.sidebar-header {
    margin: 0;
    text-align: left;
    flex: 0 0 auto;
}

.app-brand {
    display: inline-flex;
    align-items: center;
    gap: 14px;
    text-decoration: none;
}

.app-brand-mark {
    width: 48px;
    height: 48px;
    border-radius: 16px;
    background: linear-gradient(135deg, var(--clr-primary), #8d66ff);
    color: #fff;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    box-shadow: 0 18px 28px rgba(109, 74, 255, 0.24);
}

.app-brand-copy {
    display: grid;
    gap: 2px;
}

.app-brand-copy strong {
    font-size: 1rem;
    font-weight: 700;
    color: var(--clr-text-dark);
}

.app-brand-copy small {
    color: var(--clr-text-light);
    font-size: 0.82rem;
    font-weight: 500;
}

.nav-surface {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    flex: 1;
    min-width: 0;
}

.sidebar-nav {
    list-style: none;
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
    padding: 0;
    margin: 0;
    overflow: visible;
}

.sidebar-nav li {
    margin: 0;
}

.sidebar-nav a {
    position: relative;
    display: inline-flex;
    align-items: center;
    gap: 10px;
    min-height: 44px;
    padding: 10px 14px;
    border-radius: 14px;
    color: var(--clr-text-light);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.96rem;
    background: transparent;
    transition: background 0.2s ease, color 0.2s ease, box-shadow 0.2s ease;
}

.sidebar-nav a:hover,
.sidebar-nav a.active {
    background: var(--clr-primary-soft);
    color: var(--clr-primary-dark);
    box-shadow: none;
    transform: none;
}

.sidebar-nav a::after {
    display: none;
}

.sidebar-nav a i {
    width: auto;
    font-size: 0.98rem;
}

.nav-create-item {
    margin-left: 4px;
}

.submit-btn,
.action-btn,
.cancel-btn,
.logout-btn,
.nav-logout-btn,
.reply-btn,
button.submit-btn,
button.action-btn {
    min-height: 44px;
    padding: 10px 16px;
    border-radius: 14px;
    border: 1px solid transparent;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-size: 0.95rem;
    font-weight: 600;
    line-height: 1.2;
    text-decoration: none;
    cursor: pointer;
    transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;
}

.submit-btn,
.nav-create-btn {
    background: linear-gradient(135deg, var(--clr-primary), #815eff);
    color: #fff;
    box-shadow: 0 16px 30px rgba(109, 74, 255, 0.22);
}

.submit-btn:hover,
.nav-create-btn:hover {
    transform: translateY(-1px);
    background: linear-gradient(135deg, #5c39eb, #7a56fa);
    color: #fff;
}

.action-btn,
.cancel-btn,
.reply-btn {
    background: #fff;
    color: var(--clr-text-dark);
    border-color: var(--clr-border);
    box-shadow: none;
}

.action-btn:hover,
.cancel-btn:hover,
.reply-btn:hover {
    background: var(--clr-card-muted);
    border-color: var(--clr-border-strong);
    color: var(--clr-text-dark);
    transform: translateY(-1px);
}

.delete-btn,
.nav-logout-btn {
    background: #fff5f5;
    border-color: #fecaca;
    color: #b91c1c;
}

.delete-btn:hover,
.nav-logout-btn:hover {
    background: #fee2e2;
    color: #991b1b;
    border-color: #fca5a5;
}

.theme-toggle {
    position: static;
    width: 44px;
    height: 44px;
    border-radius: 14px;
    border: 1px solid var(--clr-border);
    background: #fff;
    color: var(--clr-text-dark);
    box-shadow: none;
}

.theme-toggle:hover {
    background: var(--clr-card-muted);
    transform: translateY(-1px);
}

.nav-utilities {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
    justify-content: flex-end;
}

.nav-auth-actions {
    display: flex;
    align-items: center;
    gap: 10px;
}

.nav-menu-group {
    position: relative;
}

.nav-menu-toggle,
.nav-user-toggle {
    min-height: 44px;
    padding: 8px 14px;
    border-radius: 16px;
    border: 1px solid var(--clr-border);
    background: #fff;
    color: var(--clr-text-dark);
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-weight: 600;
    cursor: pointer;
}

.nav-menu-toggle.active,
.nav-user-toggle.active,
.nav-menu-toggle:hover,
.nav-user-toggle:hover,
.nav-menu-group.open > .nav-menu-toggle,
.nav-menu-group.open > .nav-user-toggle {
    background: var(--clr-card-muted);
    border-color: var(--clr-border-strong);
}

.nav-user-avatar {
    width: 32px;
    height: 32px;
    border-radius: 12px;
    background: var(--clr-primary-soft);
    color: var(--clr-primary-dark);
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.nav-user-meta {
    display: grid;
    text-align: left;
    gap: 1px;
}

.nav-user-meta strong {
    font-size: 0.92rem;
    font-weight: 600;
}

.nav-user-meta small {
    font-size: 0.76rem;
    color: var(--clr-text-light);
}

.nav-menu-chevron {
    color: var(--clr-text-lighter);
    font-size: 0.8rem;
    transition: transform 0.2s ease;
}

.nav-menu-group.open .nav-menu-chevron {
    transform: rotate(180deg);
}

.nav-dropdown-menu {
    position: absolute;
    right: 0;
    top: calc(100% + 10px);
    min-width: 250px;
    padding: 10px;
    border-radius: 18px;
    border: 1px solid var(--clr-border);
    background: rgba(255, 255, 255, 0.98);
    box-shadow: var(--shadow);
    display: none;
    z-index: 1200;
}

.nav-menu-group.open .nav-dropdown-menu {
    display: grid;
    gap: 4px;
}

.nav-dropdown-menu a,
.nav-dropdown-menu button {
    width: 100%;
    display: flex;
    align-items: center;
    gap: 10px;
    min-height: 42px;
    padding: 10px 12px;
    border-radius: 12px;
    border: 0;
    background: transparent;
    color: var(--clr-text-dark);
    font-weight: 500;
    text-decoration: none;
    text-align: left;
}

.nav-dropdown-menu a:hover,
.nav-dropdown-menu a.active,
.nav-dropdown-menu button:hover {
    background: var(--clr-card-muted);
}

.nav-logout-form {
    margin: 0;
}

.nav-badge,
.badge {
    min-width: 22px;
    height: 22px;
    padding: 0 8px;
    border-radius: 999px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    font-weight: 700;
}

.nav-badge {
    background: #f04438;
    color: #fff;
}

.sidebar-search {
    position: relative;
    min-width: min(320px, 36vw);
}

.sidebar-search input {
    width: 100%;
    min-height: 44px;
    padding: 0 16px 0 42px;
    border-radius: 14px;
    border: 1px solid var(--clr-border);
    background: #fff;
    color: var(--clr-text-dark);
}

.sidebar-search-icon {
    position: absolute;
    left: 15px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--clr-text-lighter);
}

.sidebar-search-dropdown {
    position: absolute;
    top: calc(100% + 8px);
    left: 0;
    right: 0;
    display: none;
    padding: 10px;
    border-radius: 16px;
    border: 1px solid var(--clr-border);
    background: #fff;
    box-shadow: var(--shadow);
}

.sidebar-search-dropdown.active {
    display: grid;
    gap: 6px;
}

.sidebar-search-item {
    display: grid;
    gap: 4px;
    padding: 10px 12px;
    border-radius: 12px;
    text-decoration: none;
}

.sidebar-search-item:hover {
    background: var(--clr-card-muted);
}

.sidebar-search-type {
    color: var(--clr-primary-dark);
    font-size: 0.72rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.sidebar-search-empty {
    padding: 10px 12px;
    color: var(--clr-text-light);
}

.mobile-nav-toggle {
    display: none;
}

.main,
.page-content,
.profile-page {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 28px 24px 48px;
    min-height: auto;
}

.form-container,
.create-post-form,
.notifications-layout {
    max-width: var(--form-width);
    margin: 0 auto;
}

.page-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 18px;
    margin-bottom: 28px;
    padding-bottom: 0;
    border: 0;
}

.page-header h1,
.page-header h2 {
    display: flex;
    align-items: center;
    gap: 12px;
    margin: 0;
}

.subtitle,
.page-subtitle {
    margin-top: 8px;
    color: var(--clr-text-light);
    font-size: 0.98rem;
    font-weight: 500;
}

.back-link,
.text-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--clr-text-light);
    text-decoration: none;
    font-weight: 600;
}

.back-link:hover,
.text-link:hover {
    color: var(--clr-primary-dark);
}

.card,
.panel,
.post-card,
.chat-list-panel,
.chat-thread-panel,
.quick-actions,
.recent-users,
.stat-card,
.summary-card,
.notification-item,
.category-card,
.activity-item {
    background: rgba(255, 255, 255, 0.96);
    border: 1px solid var(--clr-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
}

.card,
.panel,
.post-card,
.quick-actions,
.recent-users {
    padding: 24px;
}

.panel-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    margin-bottom: 18px;
}

.panel h2,
.panel-header h2 {
    margin: 0;
    font-size: 1.2rem;
    font-weight: 600;
}

.empty-state,
.empty-notifications,
.empty-chat {
    border: 1px dashed var(--clr-border-strong);
    border-radius: var(--radius-lg);
    background: rgba(255, 255, 255, 0.72);
    padding: 40px 28px;
    color: var(--clr-text-light);
    text-align: center;
}

.empty-state i,
.empty-notifications i,
.empty-chat i {
    color: var(--clr-text-lighter);
}

.alert {
    border-radius: 16px;
    padding: 14px 18px;
    margin-bottom: 18px;
    font-weight: 500;
}

.alert-success {
    background: #ecfdf3;
    border: 1px solid #bbf7d0;
    color: #166534;
}

.alert-error {
    background: #fef2f2;
    border: 1px solid #fecaca;
    color: #991b1b;
}

.form-group {
    margin-bottom: 18px;
}

.form-label {
    display: block;
    margin-bottom: 8px;
    color: var(--clr-text-dark);
    font-weight: 600;
}

.form-hint,
.char-counter,
.chat-compose-hint {
    color: var(--clr-text-light);
    font-size: 0.84rem;
}

.form-input,
.form-control,
input[type="text"],
input[type="email"],
input[type="number"],
input[type="url"],
input[type="search"],
input[type="password"],
select,
textarea {
    width: 100%;
    min-height: 48px;
    padding: 12px 14px;
    border: 1px solid var(--clr-border);
    border-radius: 14px;
    background: #fff;
    color: var(--clr-text-dark);
    font-size: 0.96rem;
    box-shadow: none;
}

textarea.form-input,
textarea.form-control,
textarea {
    min-height: 140px;
    resize: vertical;
}

.form-input:focus,
.form-control:focus,
input:focus,
select:focus,
textarea:focus {
    outline: none;
    border-color: rgba(109, 74, 255, 0.42);
    box-shadow: 0 0 0 4px rgba(109, 74, 255, 0.12);
}

input[type="file"] {
    padding: 10px 12px;
    background: #fff;
}

input[type="file"]::file-selector-button {
    margin-right: 12px;
    padding: 9px 14px;
    border: 1px solid var(--clr-border);
    border-radius: 12px;
    background: var(--clr-card-muted);
    color: var(--clr-text-dark);
    font-weight: 600;
    cursor: pointer;
}

.form-actions,
.form-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    flex-wrap: wrap;
    margin-top: 24px;
    padding-top: 18px;
    border-top: 1px solid var(--clr-border);
}

.question-status,
.access-badge,
.soft-badge,
.discipline-chip {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    min-height: 30px;
    padding: 5px 10px;
    border-radius: 999px;
    font-size: 0.78rem;
    font-weight: 700;
    border: 1px solid transparent;
}

.status-open,
.question-status.open {
    background: #eaf2ff;
    color: #1d4ed8;
    border-color: #bfdbfe;
}

.status-answered,
.question-status.answered {
    background: #ecfdf3;
    color: #15803d;
    border-color: #bbf7d0;
}

.status-solved,
.question-status.resolved {
    background: #eef2f7;
    color: #334155;
    border-color: #dbe4ee;
}

.status-teacher,
.question-status.needs-teacher {
    background: #fff3e4;
    color: #c2410c;
    border-color: #fed7aa;
}

.status-closed {
    background: #fef2f2;
    color: #b91c1c;
    border-color: #fecaca;
}

.status-readonly {
    background: #fff7ed;
    color: #c2410c;
    border-color: #fdba74;
}

.category-label {
    display: inline-flex;
    align-items: center;
    min-height: 30px;
    padding: 5px 10px;
    border-radius: 999px;
    background: var(--clr-primary-soft);
    color: var(--clr-primary-dark);
    font-size: 0.78rem;
    font-weight: 700;
}

.forum-layout {
    display: grid;
    grid-template-columns: minmax(250px, 280px) minmax(0, 1fr);
    gap: 24px;
    align-items: start;
}

.forum-filters,
.post-feed,
.comments-section,
.identity-panel,
.profile-main > section {
    min-width: 0;
}

.filter-form,
.filter-categories {
    display: grid;
    gap: 14px;
}

.filter-categories a {
    display: flex;
    align-items: center;
    min-height: 42px;
    padding: 0 12px;
    border-radius: 12px;
    text-decoration: none;
    color: var(--clr-text-light);
    font-weight: 500;
}

.filter-categories a.active,
.filter-categories a:hover {
    background: var(--clr-primary-soft);
    color: var(--clr-primary-dark);
}

.compact-post-card {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 20px;
    padding: 22px 24px;
    margin-bottom: 16px;
}

.post-card-main {
    flex: 1;
    min-width: 0;
}

.post-card-topline {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
    margin-bottom: 12px;
}

.post-title {
    margin: 0 0 10px;
    font-size: 1.35rem;
    font-weight: 600;
}

.post-title a {
    text-decoration: none;
}

.post-title a:hover {
    color: var(--clr-primary-dark);
}

.post-excerpt {
    margin: 0 0 14px;
    color: var(--clr-text-light);
    line-height: 1.55;
}

.post-meta {
    display: flex;
    align-items: center;
    gap: 14px;
    flex-wrap: wrap;
    color: var(--clr-text-light);
    font-size: 0.88rem;
}

.post-card-stats {
    display: grid;
    justify-items: end;
    gap: 12px;
    min-width: 160px;
}

.post-card-stats span {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--clr-text-light);
    font-size: 0.9rem;
}

.post-metrics {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
}

.post-card-stats strong {
    font-weight: 600;
    color: var(--clr-text-dark);
}

.post-detail-card {
    padding: 28px;
}

.post-detail-header {
    margin-bottom: 18px;
}

.post-detail-header h1 {
    margin: 0 0 12px;
    font-size: clamp(1.9rem, 2.6vw, 2.5rem);
}

.post-content {
    padding: 0;
    margin-bottom: 18px;
    background: transparent;
    border-left: 0;
    color: var(--clr-text-dark);
    line-height: 1.72;
}

.detail-actions,
.question-tools form,
.comment-actions {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
}

.question-tools {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
    margin-top: 18px;
    padding-top: 18px;
    border-top: 1px solid var(--clr-border);
}

.comment {
    background: #fff;
    border: 1px solid var(--clr-border);
    border-radius: 18px;
    padding: 18px;
}

.comments-tree,
.reply-list {
    display: grid;
    gap: 14px;
}

.reply-list {
    margin-top: 14px;
    padding-left: 22px;
}

.best-answer {
    background: #f0fdf4;
    border-color: #bbf7d0;
}

.best-answer-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    margin: 10px 0 8px;
    padding: 6px 10px;
    border-radius: 999px;
    background: #dcfce7;
    color: #166534;
    font-size: 0.78rem;
    font-weight: 700;
}

.best-answer-action {
    min-height: 40px;
    padding: 8px 14px;
}

.comment-form-container {
    margin-top: 18px;
    padding: 20px;
    border-radius: 18px;
    background: var(--clr-card-muted);
    border: 1px solid var(--clr-border);
}

.comment-form-title {
    margin-bottom: 12px;
    font-weight: 600;
}

.comment-input {
    min-height: 120px;
}

.dashboard-hero {
    display: grid;
    grid-template-columns: minmax(0, 1.45fr) minmax(280px, 0.85fr);
    gap: 24px;
    align-items: stretch;
    padding: 32px;
    border-radius: 28px;
    background:
        linear-gradient(135deg, rgba(109, 74, 255, 0.08), rgba(109, 74, 255, 0.02)),
        rgba(255, 255, 255, 0.9);
    border: 1px solid rgba(221, 227, 238, 0.92);
    box-shadow: var(--shadow);
    margin-bottom: 24px;
}

.dashboard-hero p {
    max-width: 58ch;
    color: var(--clr-text-light);
    margin-top: 12px;
}

.hero-actions {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
    margin-top: 22px;
}

.dashboard-summary {
    display: grid;
    gap: 14px;
}

.dashboard-summary > div {
    padding: 18px;
    border-radius: 18px;
    background: #fff;
    border: 1px solid var(--clr-border);
}

.dashboard-summary strong {
    display: block;
    font-size: 1.6rem;
    font-weight: 700;
}

.dashboard-summary span {
    color: var(--clr-text-light);
    font-size: 0.88rem;
}

.dashboard-grid {
    display: grid;
    grid-template-columns: minmax(0, 1.25fr) minmax(280px, 0.75fr);
    gap: 24px;
}

.quick-panel,
.panel-large {
    grid-column: auto;
}

.feed-list,
.mini-list,
.category-rail {
    display: grid;
    gap: 12px;
}

.feed-row,
.mini-list a,
.quick-action,
.category-chip {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 14px 16px;
    border-radius: 14px;
    border: 1px solid var(--clr-border);
    text-decoration: none;
    background: #fff;
}

.feed-row:hover,
.mini-list a:hover,
.quick-action:hover,
.category-chip:hover {
    border-color: var(--clr-border-strong);
    background: var(--clr-card-muted);
}

.feed-title {
    flex: 1;
    min-width: 0;
    font-weight: 600;
}

.feed-meta,
.mini-list small,
.category-chip span {
    color: var(--clr-text-light);
    font-size: 0.85rem;
}

.category-chip {
    align-items: flex-start;
    flex-direction: column;
}

.notification-list {
    gap: 12px;
}

.notification-item {
    grid-template-columns: auto minmax(0, 1fr) auto;
    padding: 18px;
}

.notification-item.unread {
    background: #f8f7ff;
    border-color: #d9d0ff;
}

.notification-icon {
    background: var(--clr-primary-soft);
    color: var(--clr-primary-dark);
}

.notification-title {
    font-size: 1rem;
    font-weight: 600;
}

.notification-message {
    color: var(--clr-text-dark);
}

.notification-meta {
    color: var(--clr-text-lighter);
}

.categories-grid {
    gap: 18px;
}

.category-card {
    padding: 22px;
    border-top: 0;
}

.category-card.restricted {
    border-left: 0;
}

.category-header,
.access-info,
.category-stats,
.category-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.category-header {
    flex-direction: column;
    align-items: flex-start;
}

.category-name {
    margin: 0;
}

.category-description {
    margin: 0 0 16px;
}

.category-actions {
    margin-top: auto;
    justify-content: space-between;
    align-items: center;
}

.profile-page {
    margin: 0 auto;
    background: transparent;
}

.avatar,
.avatar-placeholder {
    width: 116px;
    height: 116px;
    border-radius: 28px;
    margin: 0 auto 16px;
    object-fit: cover;
    border: 1px solid rgba(109, 74, 255, 0.12);
    background: var(--clr-primary-soft);
    color: var(--clr-primary-dark);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
}

.profile-name {
    font-size: 1.35rem;
    font-weight: 700;
    text-align: center;
}

.profile-username {
    text-align: center;
    color: var(--clr-text-light);
    margin-bottom: 16px;
}

.section-title {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 14px;
    font-size: 1rem;
    font-weight: 600;
}

.chip-grid,
.badge-list,
.toggle-list,
.activity-list,
.contact-list {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.contact-list,
.toggle-list,
.activity-list {
    display: grid;
}

.top-actions {
    margin-bottom: 24px;
}

.study-card-layout {
    display: grid;
    grid-template-columns: 320px minmax(0, 1fr);
    gap: 24px;
}

.identity-panel {
    position: sticky;
    top: 110px;
}

.profile-main {
    display: grid;
    gap: 24px;
}

.summary-grid {
    gap: 12px;
}

.summary-card,
.activity-item {
    padding: 18px;
}

.summary-number {
    font-size: 1.8rem;
    font-weight: 700;
}

.soft-badge {
    background: var(--clr-primary-soft);
    color: var(--clr-primary-dark);
    border-color: transparent;
}

.discipline-chip {
    background: #eef4ff;
    color: #1d4ed8;
    border-color: #bfdbfe;
}

.dashboard,
.notifications-layout,
.profile-page > div,
.chat-page {
    max-width: 100%;
}

.stats-grid,
.actions-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 16px;
}

.stat-card {
    padding: 22px;
    text-align: left;
}

.stat-number {
    font-size: 2rem;
    font-weight: 700;
}

.stat-label {
    color: var(--clr-text-light);
    text-transform: none;
    letter-spacing: 0;
}

.chat-page {
    height: auto;
    min-height: calc(100vh - 180px);
    gap: 20px;
}

.chat-list-panel,
.chat-thread-panel {
    border-radius: 24px;
    box-shadow: var(--shadow);
}

.chat-list-item.active {
    background: #f4f1ff;
    border-color: #dbd2ff;
}

.chat-avatar,
.chat-thread-avatar,
.message-row.own .message-bubble {
    background: linear-gradient(135deg, #7d5dff, #5e48dc);
}

.message-bubble {
    border-radius: 20px 20px 20px 10px;
    box-shadow: 0 10px 22px rgba(15, 23, 42, 0.05);
}

.message-row.own .message-bubble {
    color: #fff;
    border-radius: 20px 20px 10px 20px;
}

.chat-action-btn,
.reply-btn.chat-action-btn {
    font-weight: 600;
}

.chat-attach-btn,
.chat-send-btn {
    min-height: 46px;
}

.pagination {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    margin-top: 20px;
}

.pagination a,
.pagination span {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 42px;
    padding: 0 14px;
    border-radius: 12px;
    text-decoration: none;
}

.pagination a {
    border: 1px solid var(--clr-border);
    background: #fff;
}

.pagination a.disabled {
    opacity: 0.45;
    pointer-events: none;
}

@media (max-width: 1080px) {
    .app-nav-inner {
        align-items: flex-start;
        flex-direction: column;
    }

    .nav-surface {
        width: 100%;
        align-items: flex-start;
        flex-direction: column;
    }

    .nav-utilities {
        width: 100%;
        justify-content: flex-start;
    }

    .sidebar-search {
        min-width: 240px;
        width: min(100%, 360px);
    }

    .forum-layout,
    .dashboard-grid,
    .study-card-layout,
    .dashboard-hero {
        grid-template-columns: 1fr;
    }

    .identity-panel {
        position: static;
    }

    .compact-post-card {
        flex-direction: column;
        align-items: stretch;
    }

    .post-card-stats {
        justify-items: start;
        min-width: 0;
    }
}

@media (max-width: 760px) {
    .sidebar {
        position: sticky;
    }

    .app-nav-inner {
        padding: 16px 16px 14px;
    }

    .mobile-nav-toggle {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        width: 44px;
        height: 44px;
        border: 1px solid var(--clr-border);
        border-radius: 14px;
        background: #fff;
        color: var(--clr-text-dark);
    }

    .nav-surface {
        display: none;
        width: 100%;
        padding-top: 6px;
    }

    body.nav-open .nav-surface {
        display: flex;
    }

    .sidebar-nav,
    .nav-utilities,
    .nav-auth-actions {
        width: 100%;
        flex-direction: column;
        align-items: stretch;
    }

    .sidebar-nav a,
    .nav-menu-toggle,
    .nav-user-toggle,
    .sidebar-search,
    .nav-auth-actions .submit-btn,
    .nav-auth-actions .action-btn {
        width: 100%;
    }

    .nav-menu-group {
        width: 100%;
    }

    .nav-dropdown-menu {
        position: static;
        margin-top: 8px;
        min-width: 0;
    }

    .main,
    .page-content,
    .profile-page {
        padding: 22px 16px 40px;
    }

    .page-header,
    .top-actions,
    .form-actions,
    .form-footer,
    .category-actions,
    .notifications-header {
        flex-direction: column;
        align-items: stretch;
    }

    .notification-item {
        grid-template-columns: 1fr;
    }

    .notification-actions {
        justify-content: flex-start;
    }

    .chat-page {
        grid-template-columns: 1fr;
    }

    .chat-compose form {
        grid-template-columns: auto minmax(0, 1fr) auto;
    }

    .chat-send-btn span,
    .nav-user-meta small {
        display: none;
    }
}

/* === UX polish: clickable cards + final theme layer === */
:root {
    --bg: #f4f7fb;
    --surface: #ffffff;
    --surface-soft: #f8fafc;
    --surface-strong: #eef2ff;
    --text: #0f172a;
    --muted: #64748b;
    --border: #d9e2ef;
    --border-strong: rgba(124, 58, 237, 0.18);
    --primary: #7c3aed;
    --primary-hover: #6d28d9;
    --primary-soft: #ede9fe;
    --success-soft: #ecfdf3;
    --success-text: #15803d;
    --info-soft: #eaf2ff;
    --info-text: #2563eb;
    --warning-soft: #fff7ed;
    --warning-text: #c2410c;
    --danger-soft: #fef2f2;
    --danger-text: #dc2626;
    --hero-bg: linear-gradient(135deg, rgba(124, 58, 237, 0.08), rgba(255, 255, 255, 0.94));
    --hero-panel-bg: rgba(255, 255, 255, 0.86);
    --header-bg: rgba(248, 250, 255, 0.9);
    --field-bg: #ffffff;
    --field-text: #0f172a;
    --field-placeholder: #94a3b8;
    --shadow-soft: 0 18px 45px rgba(15, 23, 42, 0.08);
    --shadow-hover: 0 14px 35px rgba(15, 23, 42, 0.10);
}

:root[data-theme="dark"] {
    --bg: #0f172a;
    --surface: #172033;
    --surface-soft: #1e293b;
    --surface-strong: #111827;
    --text: #e5e7eb;
    --muted: #94a3b8;
    --border: #334155;
    --border-strong: rgba(167, 139, 250, 0.4);
    --primary: #a78bfa;
    --primary-hover: #8b5cf6;
    --primary-soft: rgba(167, 139, 250, 0.16);
    --success-soft: rgba(34, 197, 94, 0.18);
    --success-text: #86efac;
    --info-soft: rgba(59, 130, 246, 0.18);
    --info-text: #93c5fd;
    --warning-soft: rgba(245, 158, 11, 0.18);
    --warning-text: #fdba74;
    --danger-soft: rgba(248, 113, 113, 0.16);
    --danger-text: #fca5a5;
    --hero-bg: linear-gradient(135deg, rgba(124, 58, 237, 0.22), rgba(23, 32, 51, 0.96));
    --hero-panel-bg: rgba(15, 23, 42, 0.68);
    --header-bg: rgba(15, 23, 42, 0.92);
    --field-bg: #111827;
    --field-text: #e5e7eb;
    --field-placeholder: #94a3b8;
    --shadow-soft: 0 18px 45px rgba(0, 0, 0, 0.35);
    --shadow-hover: 0 18px 50px rgba(0, 0, 0, 0.45);
}

body,
.main,
.page-content,
.profile-page {
    background: var(--bg);
    color: var(--text);
}

body {
    background:
        radial-gradient(circle at top left, rgba(124, 58, 237, 0.08), transparent 24rem),
        var(--bg);
    color: var(--text);
}

:root[data-theme="dark"] body {
    background:
        radial-gradient(circle at top left, rgba(124, 58, 237, 0.16), transparent 26rem),
        linear-gradient(180deg, #0f172a 0%, #111827 100%);
}

.sidebar {
    background: var(--header-bg);
    border-bottom-color: var(--border);
    color: var(--text);
}

.app-brand-copy strong,
.nav-menu-toggle,
.nav-user-toggle,
.theme-toggle,
.sidebar-search input,
.nav-dropdown-menu a,
.nav-dropdown-menu button,
.page-header h1,
.page-header h2,
.panel h2,
.panel-header h2,
.feed-title,
.category-name,
.post-title,
.post-title a,
.notification-title,
.activity-title,
.chat-thread-title,
.chat-list-title {
    color: var(--text);
}

.app-brand-copy small,
.subtitle,
.page-subtitle,
.post-meta,
.feed-meta,
.category-description,
.category-stats,
.notification-meta,
.notification-message,
.activity-preview,
.activity-meta,
.chat-thread-subtitle,
.chat-list-subtitle,
.chat-total-count,
.nav-user-meta small {
    color: var(--muted);
}

.sidebar-nav a,
.text-link,
.back-link {
    color: var(--muted);
}

.sidebar-nav a:hover,
.sidebar-nav a.active,
.text-link:hover,
.back-link:hover,
.nav-menu-toggle.active,
.nav-user-toggle.active,
.nav-menu-toggle:hover,
.nav-user-toggle:hover,
.nav-menu-group.open > .nav-menu-toggle,
.nav-menu-group.open > .nav-user-toggle {
    background: var(--primary-soft);
    color: var(--primary);
    border-color: var(--border-strong);
}

.nav-dropdown-menu,
.panel,
.card,
.post-card,
.quick-actions,
.recent-users,
.stat-card,
.summary-card,
.notification-item,
.category-card,
.activity-item,
.chat-list-panel,
.chat-thread-panel,
.quick-panel {
    background: var(--surface);
    border-color: var(--border);
    box-shadow: var(--shadow-soft);
}

.dashboard-hero {
    background: var(--hero-bg);
    border-color: var(--border);
    box-shadow: var(--shadow-soft);
}

.dashboard-summary > div {
    background: var(--hero-panel-bg);
    border-color: var(--border);
    backdrop-filter: blur(8px);
}

.dashboard-summary strong,
.stat-number,
.summary-number {
    color: var(--primary);
}

.dashboard-summary span,
.stat-label {
    color: var(--muted);
}

.feed-row,
.quick-action,
.mini-list a,
.category-chip,
.notification-filter-btn,
.pagination a,
.pagination span {
    background: var(--surface);
    border-color: var(--border);
    color: var(--text);
}

.quick-action,
.mini-list a {
    color: var(--text);
}

.feed-row:hover,
.quick-action:hover,
.mini-list a:hover,
.category-chip:hover,
.pagination a:hover {
    background: var(--surface-soft);
    border-color: var(--border-strong);
}

.form-input,
.form-control,
input[type="text"],
input[type="email"],
input[type="number"],
input[type="url"],
input[type="search"],
input[type="password"],
select,
textarea,
.sidebar-search input {
    background: var(--field-bg);
    color: var(--field-text);
    border-color: var(--border);
}

.form-input::placeholder,
.form-control::placeholder,
input::placeholder,
textarea::placeholder,
.sidebar-search input::placeholder {
    color: var(--field-placeholder);
}

.form-input:focus,
.form-control:focus,
input:focus,
select:focus,
textarea:focus,
.sidebar-search input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(124, 58, 237, 0.14);
}

input[type="file"]::file-selector-button {
    background: var(--surface-soft);
    color: var(--text);
    border-color: var(--border);
}

.submit-btn,
.nav-create-btn {
    background: linear-gradient(135deg, var(--primary), var(--primary-hover));
    color: #fff;
}

.submit-btn:hover,
.nav-create-btn:hover {
    background: linear-gradient(135deg, var(--primary-hover), var(--primary));
    color: #fff;
}

.action-btn,
.cancel-btn,
.reply-btn,
.nav-menu-toggle,
.nav-user-toggle,
.theme-toggle,
.nav-dropdown-menu {
    background: var(--surface);
    color: var(--text);
    border-color: var(--border);
}

.action-btn:hover,
.cancel-btn:hover,
.reply-btn:hover,
.theme-toggle:hover {
    background: var(--surface-soft);
    color: var(--text);
    border-color: var(--border-strong);
}

.delete-btn,
.nav-logout-btn {
    background: var(--danger-soft);
    color: var(--danger-text);
    border-color: rgba(248, 113, 113, 0.32);
}

.delete-btn:hover,
.nav-logout-btn:hover {
    background: rgba(248, 113, 113, 0.24);
    color: var(--danger-text);
}

.question-status,
.access-badge,
.soft-badge,
.discipline-chip {
    border-color: transparent;
}

.status-open,
.question-status.open {
    background: var(--info-soft);
    color: var(--info-text);
    border-color: rgba(59, 130, 246, 0.2);
}

.status-answered,
.question-status.answered {
    background: var(--success-soft);
    color: var(--success-text);
    border-color: rgba(34, 197, 94, 0.2);
}

.status-solved,
.question-status.resolved {
    background: rgba(148, 163, 184, 0.18);
    color: var(--text);
    border-color: rgba(148, 163, 184, 0.22);
}

.status-teacher,
.question-status.needs-teacher {
    background: var(--warning-soft);
    color: var(--warning-text);
    border-color: rgba(245, 158, 11, 0.2);
}

.status-closed {
    background: var(--danger-soft);
    color: var(--danger-text);
    border-color: rgba(248, 113, 113, 0.2);
}

.status-readonly {
    background: var(--warning-soft);
    color: var(--warning-text);
    border-color: rgba(245, 158, 11, 0.2);
}

.soft-badge,
.category-label {
    background: var(--primary-soft);
    color: var(--primary);
}

.comment-form-container,
.reply-compose,
.chat-search-bar,
.chat-compose,
.chat-list-header,
.chat-thread-header,
.messages,
.chat-list {
    background: var(--surface-soft);
    border-color: var(--border);
}

.messages {
    background:
        radial-gradient(circle at 0 0, rgba(124, 58, 237, 0.08), transparent 28rem),
        var(--surface-soft);
}

.message-bubble {
    background: var(--surface);
    border-color: var(--border);
}

.message-row.own .message-bubble {
    background: linear-gradient(135deg, var(--primary), var(--primary-hover));
}

.chat-attach-btn,
.chat-action-btn,
.reply-btn.chat-action-btn {
    background: var(--surface);
    color: var(--text);
    border-color: var(--border);
}

.chat-attach-btn:hover,
.chat-action-btn:hover,
.reply-btn.chat-action-btn:hover {
    background: var(--surface-soft);
    border-color: var(--border-strong);
    color: var(--primary);
}

.clickable-card {
    cursor: pointer;
    transition: transform 0.18s ease, box-shadow 0.18s ease, border-color 0.18s ease, background-color 0.18s ease;
}

.clickable-card:hover,
.clickable-card:focus-visible {
    transform: translateY(-2px);
    box-shadow: var(--shadow-hover);
    border-color: rgba(124, 58, 237, 0.35);
}

.clickable-card:focus-visible {
    outline: 2px solid rgba(124, 58, 237, 0.35);
    outline-offset: 2px;
}

.feed-row.clickable-card:hover {
    background: var(--surface-soft);
}

.category-card.clickable-card:hover {
    background: var(--surface-soft);
}

:root[data-theme="dark"] .sidebar {
    backdrop-filter: blur(18px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.25);
}

:root[data-theme="dark"] .sidebar-search input,
:root[data-theme="dark"] .theme-toggle,
:root[data-theme="dark"] .nav-menu-toggle,
:root[data-theme="dark"] .nav-user-toggle,
:root[data-theme="dark"] .notification-filter-btn,
:root[data-theme="dark"] .pagination a,
:root[data-theme="dark"] .pagination span {
    background: var(--surface-strong);
}

:root[data-theme="dark"] .dashboard-hero h1,
:root[data-theme="dark"] .dashboard-hero p,
:root[data-theme="dark"] .dashboard-summary span,
:root[data-theme="dark"] .dashboard-summary strong {
    color: #f8fafc;
}

:root[data-theme="dark"] .dashboard-summary > div {
    background: rgba(15, 23, 42, 0.72);
}

:root[data-theme="dark"] .feed-row,
:root[data-theme="dark"] .quick-action,
:root[data-theme="dark"] .mini-list a,
:root[data-theme="dark"] .category-chip,
:root[data-theme="dark"] .notification-item,
:root[data-theme="dark"] .activity-item,
:root[data-theme="dark"] .summary-card,
:root[data-theme="dark"] .category-card,
:root[data-theme="dark"] .post-card,
:root[data-theme="dark"] .panel,
:root[data-theme="dark"] .quick-panel {
    color: var(--text);
}

:root[data-theme="dark"] .feed-meta,
:root[data-theme="dark"] .category-description,
:root[data-theme="dark"] .category-stats,
:root[data-theme="dark"] .mini-list small,
:root[data-theme="dark"] .activity-preview,
:root[data-theme="dark"] .activity-meta,
:root[data-theme="dark"] .post-meta,
:root[data-theme="dark"] .notification-meta,
:root[data-theme="dark"] .notification-message {
    color: var(--muted);
}

:root[data-theme="dark"] .nav-dropdown-menu a:hover,
:root[data-theme="dark"] .nav-dropdown-menu button:hover,
:root[data-theme="dark"] .sidebar-search-item:hover,
:root[data-theme="dark"] .feed-row:hover,
:root[data-theme="dark"] .quick-action:hover,
:root[data-theme="dark"] .mini-list a:hover,
:root[data-theme="dark"] .category-chip:hover,
:root[data-theme="dark"] .category-card.clickable-card:hover {
    background: #22304a;
}

:root[data-theme="dark"] .notification-item.unread {
    background: #1b2740;
    border-color: rgba(167, 139, 250, 0.28);
}

:root[data-theme="dark"] .notification-icon,
:root[data-theme="dark"] .category-icon,
:root[data-theme="dark"] .nav-user-avatar {
    background: var(--primary-soft);
    color: var(--primary);
}

:root[data-theme="dark"] .best-answer {
    background: rgba(22, 163, 74, 0.16);
    border-color: rgba(74, 222, 128, 0.25);
}

:root[data-theme="dark"] .best-answer-badge {
    background: rgba(34, 197, 94, 0.18);
    color: #86efac;
}

@media (max-width: 760px) {
    .clickable-card:hover,
    .clickable-card:focus-visible {
        transform: none;
    }

    .dashboard-summary > div {
        min-height: 88px;
    }
}

/* === Compact topbar layout === */
body {
    padding-top: 0 !important;
}

.app-nav-inner {
    max-width: min(100%, 1680px);
    min-height: var(--topbar-height);
    padding-top: 8px;
    padding-bottom: 8px;
}

.nav-surface {
    flex-wrap: nowrap;
}

.sidebar-nav {
    flex: 1 1 auto;
    flex-wrap: nowrap;
    overflow-x: auto;
    overflow-y: hidden;
    min-width: 0;
    gap: 8px;
}

.sidebar-nav a {
    min-height: 40px;
    padding: 8px 12px;
}

.nav-create-btn {
    min-height: 40px;
    padding: 8px 14px;
}

.nav-utilities {
    flex: 0 1 auto;
    flex-wrap: nowrap;
    min-width: 0;
    gap: 10px;
}

.sidebar-search {
    flex: 1 1 clamp(180px, 18vw, 300px);
    min-width: 180px;
}

.nav-menu-toggle,
.nav-user-toggle,
.nav-user-meta strong,
.nav-user-meta small {
    white-space: nowrap;
}

.nav-user-meta {
    min-width: max-content;
}

@media (max-width: 1280px) and (min-width: 1091px) {
    :root {
        --topbar-height: 64px;
    }

    .app-brand-copy {
        display: none;
    }

    .sidebar {
        height: auto;
        min-height: var(--topbar-height);
        padding: 0;
        flex-wrap: nowrap;
    }

    .sidebar-nav {
        order: initial;
        flex-basis: auto;
        width: auto;
        gap: 6px;
    }

    .nav-utilities {
        flex: 0 0 auto;
    }

    .sidebar-search {
        flex: 0 0 160px;
        min-width: 160px;
        max-width: 160px;
    }

    .sidebar-search,
    .mobile-nav-toggle,
    .user-info,
    .theme-toggle {
        order: initial;
    }
}

@media (max-width: 1080px) {
    .app-nav-inner,
    .nav-surface {
        align-items: stretch;
    }

    .sidebar-nav {
        width: 100%;
    }

    .nav-utilities {
        flex-wrap: wrap;
    }
}

@media (max-width: 860px) {
    body {
        padding-top: var(--topbar-height) !important;
    }

    .sidebar {
        display: block !important;
        height: auto !important;
        min-height: var(--topbar-height) !important;
        padding: 0 !important;
    }

    .app-nav-inner {
        display: grid !important;
        grid-template-columns: auto 1fr auto;
        align-items: center !important;
        min-height: var(--topbar-height);
        padding: 8px 14px !important;
        gap: 10px;
    }

    .sidebar-header {
        grid-column: 1;
        min-width: 0 !important;
    }

    .app-brand-mark {
        width: 44px;
        height: 44px;
        border-radius: 14px;
    }

    .mobile-nav-toggle {
        grid-column: 3;
        justify-self: end;
    }

    .nav-surface {
        grid-column: 1 / -1;
        width: 100%;
    }
}

@media (max-width: 520px) {
    .app-brand-copy {
        display: none;
    }
}