/* === Reset & Base === */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

/* Browsers that support backdrop-filter get the true glass-morphism effect */
@supports (backdrop-filter: blur(1px)) or (-webkit-backdrop-filter: blur(1px)) {
    :root {
        --glass-bg: rgba(255, 255, 255, 0.75);
        --glass-border: rgba(255, 255, 255, 0.3);
    }
}

body {
    font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    background: linear-gradient(135deg, var(--bg-gradient-start) 0%, var(--bg-gradient-end) 100%);
    background-attachment: fixed;
    color: var(--text);
    line-height: 1.65;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    font-size: 15px;
    position: relative;
}

body::before {
    content: '';
    position: fixed;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle at 20% 30%, rgba(37, 99, 235, 0.08) 0%, transparent 50%),
                radial-gradient(circle at 80% 70%, rgba(16, 185, 129, 0.06) 0%, transparent 50%);
    z-index: -1;
    animation: bgFloat 20s ease-in-out infinite alternate;
}

@keyframes bgFloat {
    from { transform: translate(0, 0); }
    to { transform: translate(-5%, -5%); }
}

/* ── Theme Toggle Button ── */
.theme-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 34px;
    height: 34px;
    border-radius: 50%;
    border: 1.5px solid var(--border);
    background: var(--surface);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition);
    flex-shrink: 0;
    position: relative;
}
.theme-toggle:hover {
    border-color: var(--accent);
    color: var(--accent);
    background: var(--accent-light);
    transform: scale(1.1);
}
.theme-toggle-icon {
    position: absolute;
    transition: opacity 0.25s ease, transform 0.35s ease;
}
.theme-icon-sun { opacity: 1; transform: rotate(0deg) scale(1); }
.theme-icon-moon { opacity: 0; transform: rotate(-90deg) scale(0); }
[data-theme="dark"] .theme-icon-sun { opacity: 0; transform: rotate(90deg) scale(0); }
[data-theme="dark"] .theme-icon-moon { opacity: 1; transform: rotate(0deg) scale(1); }
.admin-theme-toggle {
    width: 32px;
    height: 32px;
    border-color: rgba(148, 163, 184, 0.3);
    background: rgba(255,255,255,0.5);
}
.admin-theme-toggle:hover {
    border-color: var(--accent);
    background: var(--accent-light);
}
[data-theme="dark"] .admin-theme-toggle {
    background: rgba(255,255,255,0.08);
    border-color: rgba(148, 163, 184, 0.2);
}

/* ── Dark mode: admin sidebar ── */
[data-theme="dark"] .admin-sidebar {
    background: linear-gradient(180deg, #0F172A 0%, #090E1A 100%);
    box-shadow: 2px 0 20px rgba(0,0,0,0.3);
}
[data-theme="dark"] .admin-header {
    background: rgba(30, 41, 59, 0.97);
    border-bottom-color: #334155;
}
[data-theme="dark"] .admin-header h2 { color: #F1F5F9; }
[data-theme="dark"] .admin-time { color: #94A3B8; }
[data-theme="dark"] .admin-user-badge { color: #CBD5E1; }
[data-theme="dark"] .admin-panel,
[data-theme="dark"] .admin-stat-card,
[data-theme="dark"] .ann-sort-panel,
[data-theme="dark"] .ann-sort-card,
[data-theme="dark"] .config-item {
    background: #1E293B;
    border-color: #334155;
}
[data-theme="dark"] .admin-stat-value { color: #F1F5F9; }
[data-theme="dark"] .admin-panel h3 { color: #F1F5F9; }
[data-theme="dark"] .admin-main .data-table th {
    background: linear-gradient(135deg, #1E293B 0%, #334155 100%);
    color: #E2E8F0;
}
[data-theme="dark"] .admin-main .data-table td { color: #CBD5E1; border-bottom-color: #334155; }
[data-theme="dark"] .admin-main .data-table tbody tr:hover { background: rgba(37,99,235,0.1); }
[data-theme="dark"] .admin-main .table-container { background: #1E293B; }
[data-theme="dark"] .search-input,
[data-theme="dark"] .filter-input,
[data-theme="dark"] .filter-select,
[data-theme="dark"] .config-input {
    background: #1E293B;
    border-color: #334155;
    color: #F1F5F9;
}
[data-theme="dark"] .ann-modal-header,
[data-theme="dark"] .ann-form-actions {
    background: #1E293B;
    border-color: #334155;
}
[data-theme="dark"] .ann-sort-header {
    background: linear-gradient(135deg, #1E293B 0%, #334155 100%);
    color: #F1F5F9;
    border-bottom-color: #334155;
}
[data-theme="dark"] .ann-sort-pos { background: #334155; color: #94A3B8; }
[data-theme="dark"] .modal-card { background: #1E293B; }
[data-theme="dark"] .modal-header { border-bottom-color: #334155; }
[data-theme="dark"] .modal-header h3 { color: #F1F5F9; }
[data-theme="dark"] .modal-body { color: #CBD5E1; }
[data-theme="dark"] .popup-body { color: var(--popup-body-text, #CBD5E1); }
[data-theme="dark"] .popup-card { background: #1E293B; border-color: #334155; }
[data-theme="dark"] .sidebar-overlay { background: rgba(0,0,0,0.6); }

/* ── Dark mode: navbar (no white glass) ── */
[data-theme="dark"] .navbar {
    background: rgba(15, 23, 42, 0.9);
    border-bottom-color: #334155;
}
[data-theme="dark"] .nav-username { color: #E2E8F0; }
[data-theme="dark"] .nav-links a { color: #94A3B8; }
[data-theme="dark"] .nav-links a:hover { background: rgba(37,99,235,0.15); color: #93C5FD; }

/* ── Dark mode: banner announcements ── */
[data-theme="dark"] .banner-announcements {
    background: linear-gradient(135deg, #1E293B 0%, #1E293B 50%, #1E293B 100%);
    border-color: #334155;
    box-shadow: 0 4px 24px rgba(0,0,0,0.2);
}
[data-theme="dark"] .banner-item {
    background: rgba(30, 41, 59, 0.9);
    border-color: rgba(71, 85, 105, 0.2);
}
[data-theme="dark"] .banner-item:hover {
    background: rgba(30, 41, 59, 0.95);
}
[data-theme="dark"] .banner-link {
    background: rgba(51, 65, 85, 0.5);
    border-color: rgba(71, 85, 105, 0.3);
}
[data-theme="dark"] .banner-link:hover {
    background: #334155;
}
[data-theme="dark"] .banner-close {
    background: rgba(51, 65, 85, 0.6);
    border-color: rgba(71, 85, 105, 0.3);
    color: #94A3B8;
}
[data-theme="dark"] .banner-close:hover {
    background: #334155;
    border-color: rgba(148, 163, 184, 0.4);
}
[data-theme="dark"] .banner-item-close {
    background: rgba(51, 65, 85, 0.5);
    color: #94A3B8;
}
[data-theme="dark"] .banner-item-close:hover {
    background: rgba(71, 85, 105, 0.6);
}

/* ── Dark mode: footer ── */
[data-theme="dark"] .footer { border-top-color: #334155; }

/* ── Dark mode: auth pages ── */
[data-theme="dark"] .auth-card { background: #1E293B; border-color: #334155; }
[data-theme="dark"] .auth-card h2 { color: #F1F5F9; }
[data-theme="dark"] .auth-card p { color: #94A3B8; }
[data-theme="dark"] .auth-form input {
    background: #0F172A;
    border-color: #334155;
    color: #E2E8F0;
}
[data-theme="dark"] .auth-form input:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(37,99,235,0.15);
}

/* ── Dark mode: feature cards ── */
[data-theme="dark"] .feature-card,
[data-theme="dark"] .action-card {
    background: #1E293B;
    border-color: #334155;
}
[data-theme="dark"] .feature-card:hover,
[data-theme="dark"] .action-card:hover {
    border-color: var(--accent);
    box-shadow: 0 8px 24px rgba(0,0,0,0.3);
}
[data-theme="dark"] .feature-card h3,
[data-theme="dark"] .action-card h3 { color: #F1F5F9; }

/* ── Dark mode: report page ── */
[data-theme="dark"] .score-card,
[data-theme="dark"] .chart-card,
[data-theme="dark"] .annotation-section,
[data-theme="dark"] .detail-section {
    background: #1E293B;
    border-color: #334155;
    backdrop-filter: none;
}
[data-theme="dark"] .report-header { border-bottom-color: #334155; }
[data-theme="dark"] .report-header h1 {
    background: linear-gradient(135deg, #E2E8F0 0%, #94A3B8 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
[data-theme="dark"] .report-meta { color: #64748B; }
[data-theme="dark"] .stat-card { background: #0F172A; border-color: #334155; }
[data-theme="dark"] .stat-card-value { color: #E2E8F0; }
[data-theme="dark"] .stat-card-label { color: #64748B; }
[data-theme="dark"] .legend-bar { background: #334155; }
[data-theme="dark"] .legend-label { color: #94A3B8; }

/* ── Dark mode: detect page ── */
[data-theme="dark"] .upload-card {
    background: #1E293B;
    border-color: #334155;
    backdrop-filter: none;
}
[data-theme="dark"] .drop-zone {
    background: linear-gradient(135deg, rgba(15,23,42,0.5) 0%, rgba(30,41,59,0.8) 100%);
    border-color: #334155;
}
[data-theme="dark"] .drop-zone:hover,
[data-theme="dark"] .drop-zone.dragover {
    background: linear-gradient(135deg, rgba(37,99,235,0.1) 0%, rgba(30,41,59,0.8) 100%);
    border-color: var(--accent);
}
[data-theme="dark"] .drop-title { color: #E2E8F0; }
[data-theme="dark"] .drop-hint { color: #64748B; }
[data-theme="dark"] .file-badge { background: #0F172A; border-color: #334155; }
[data-theme="dark"] .file-name { color: #E2E8F0; }
[data-theme="dark"] .file-size { color: #64748B; }
[data-theme="dark"] .tab-navigation {
    background: rgba(15, 23, 42, 0.6);
    border-color: #334155;
}
[data-theme="dark"] .tab-button { color: #94A3B8; }
[data-theme="dark"] .tab-button:hover { color: #E2E8F0; background: rgba(51,65,85,0.4); }
[data-theme="dark"] .tab-button.active {
    background: #1E293B;
    color: #F1F5F9;
    box-shadow: 0 4px 12px rgba(0,0,0,0.3);
}
[data-theme="dark"] .text-input {
    background: #0F172A;
    border-color: #334155;
    color: #E2E8F0;
}
[data-theme="dark"] .text-input:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(37,99,235,0.1);
}
[data-theme="dark"] .char-count { color: #64748B; }

/* ── Dark mode: progress panel ── */
[data-theme="dark"] .progress-panel {
    background: #1E293B;
    border-color: #334155;
}
[data-theme="dark"] .progress-title { color: #E2E8F0; }
[data-theme="dark"] .progress-detail { color: #94A3B8; }
[data-theme="dark"] .cancel-button {
    background: rgba(239,68,68,0.1);
    border-color: rgba(239,68,68,0.3);
    color: #FCA5A5;
}
[data-theme="dark"] .cancel-button:hover {
    background: rgba(239,68,68,0.2);
}

/* ── Dark mode: result modal ── */
[data-theme="dark"] .result-modal-card {
    background: #1E293B;
    border-color: #334155;
}
[data-theme="dark"] .result-modal-header {
    background: linear-gradient(135deg, #1E293B 0%, #334155 100%);
    border-bottom-color: #334155;
}
[data-theme="dark"] .result-modal-header h2 { color: #F1F5F9; }
[data-theme="dark"] .result-modal-close { color: #94A3B8; }
[data-theme="dark"] .result-modal-close:hover { color: #FCA5A5; background: rgba(239,68,68,0.1); }
[data-theme="dark"] .result-stat-value { color: #E2E8F0; }
[data-theme="dark"] .result-stat-label { color: #64748B; }
[data-theme="dark"] .result-verdict { color: #CBD5E1; }
[data-theme="dark"] .result-modal-actions { border-top-color: #334155; }

/* ── Dark mode: detect page inline styles (score ring backgrounds) ── */
[data-theme="dark"] .result-score-ring.high { background: rgba(239,68,68,0.15); }
[data-theme="dark"] .result-score-ring.mid { background: rgba(245,158,11,0.15); }
[data-theme="dark"] .result-score-ring.low { background: rgba(249,115,22,0.15); }
[data-theme="dark"] .result-score-ring.safe { background: rgba(16,185,129,0.15); }

/* ── Dark mode: history page ── */
[data-theme="dark"] .history-container h2 { color: #F1F5F9; }
[data-theme="dark"] .home-stat-card { background: #1E293B; border-color: #334155; }
[data-theme="dark"] .home-stat-value { color: #E2E8F0; }
[data-theme="dark"] .home-stat-label { color: #64748B; }
[data-theme="dark"] .section-title-home { color: #E2E8F0; }

/* ── Dark mode: settings page ── */
[data-theme="dark"] .settings-card { background: #1E293B; border-color: #334155; }
[data-theme="dark"] .settings-card h3 { color: #F1F5F9; }
[data-theme="dark"] .settings-card label { color: #CBD5E1; }
[data-theme="dark"] .settings-card input {
    background: #0F172A;
    border-color: #334155;
    color: #E2E8F0;
}

/* =================================================================
   PAGE TRANSITION ANIMATION
   ================================================================= */
.main-content {
    animation: pageFadeIn 0.35s ease-out;
}
@keyframes pageFadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* =================================================================
   TABLE HORIZONTAL SCROLL (for small screens)
   ================================================================= */
.table-container {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: thin;
}
.table-container::-webkit-scrollbar { height: 6px; }
.table-container::-webkit-scrollbar-thumb { background: #CBD5E1; border-radius: 3px; }
[data-theme="dark"] .table-container::-webkit-scrollbar-thumb { background: #475569; }
.data-table { min-width: 600px; }

/* =================================================================
   SKELETON LOADING UTILITIES
   ================================================================= */
.skeleton {
    background: linear-gradient(90deg, var(--border-light) 25%, var(--border) 50%, var(--border-light) 75%);
    background-size: 200% 100%;
    animation: skeletonShimmer 1.5s ease-in-out infinite;
    border-radius: 4px;
    color: transparent !important;
    user-select: none;
    pointer-events: none;
}
@keyframes skeletonShimmer {
    from { background-position: 200% 0; }
    to { background-position: -200% 0; }
}
.skeleton-text { height: 1em; width: 100%; margin-bottom: 8px; }
.skeleton-text-sm { height: 0.8em; width: 60%; }
.skeleton-circle { width: 48px; height: 48px; border-radius: 50%; }
.skeleton-badge { height: 1.2em; width: 48px; border-radius: 20px; display: inline-block; }
[data-theme="dark"] .skeleton {
    background: linear-gradient(90deg, #1E293B 25%, #334155 50%, #1E293B 75%);
    background-size: 200% 100%;
}
}

.container {
    max-width: 1024px;
    margin: 0 auto;
    padding: 32px 24px;
}

a { color: var(--accent); text-decoration: none; transition: all var(--transition); }
a:hover { color: var(--accent-hover); }

/* =================================================================
   BUTTONS — Unified & Enhanced
   ================================================================= */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 22px;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    font-weight: 600;
    font-family: inherit;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    white-space: nowrap;
    letter-spacing: -0.01em;
    position: relative;
    overflow: hidden;
    text-decoration: none;
    user-select: none;
    -webkit-tap-highlight-color: transparent;
}

.btn::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(to bottom, rgba(255,255,255,0.15), transparent);
    opacity: 0;
    transition: opacity 0.3s ease;
    pointer-events: none;
}

.btn::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: rgba(255,255,255,0.25);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    transition: width 0.6s ease, height 0.6s ease;
    pointer-events: none;
}

.btn:hover::before { opacity: 1; }
.btn:active::after { width: 300px; height: 300px; }

.btn:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 3px;
    border-radius: var(--radius-sm);
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent) 0%, #60A5FA 100%);
    color: #fff;
    box-shadow: 0 4px 14px rgba(37, 99, 235, 0.35), 0 2px 6px rgba(37, 99, 235, 0.2),
                inset 0 1px 0 rgba(255,255,255,0.15);
}
.btn-primary:hover {
    background: linear-gradient(135deg, var(--accent-hover) 0%, #3B82F6 100%);
    box-shadow: 0 8px 24px rgba(37, 99, 235, 0.45), 0 4px 12px rgba(37, 99, 235, 0.25),
                inset 0 1px 0 rgba(255,255,255,0.2);
    transform: translateY(-3px);
}
.btn-primary:active { transform: translateY(-1px) scale(0.98); box-shadow: 0 2px 8px rgba(37, 99, 235, 0.3); }
.btn-primary:disabled,
.btn-primary[disabled] {
    background: linear-gradient(135deg, #CBD5E1 0%, #94A3B8 100%);
    cursor: not-allowed;
    transform: none !important;
    box-shadow: none;
    opacity: 0.7;
}

.btn-secondary {
    background: linear-gradient(135deg, var(--secondary) 0%, #475569 100%);
    color: #fff;
    box-shadow: 0 4px 12px rgba(51, 65, 85, 0.3), 0 2px 4px rgba(51, 65, 85, 0.2);
}
.btn-secondary:hover {
    background: linear-gradient(135deg, #334155 0%, #1E293B 100%);
    box-shadow: 0 6px 18px rgba(51, 65, 85, 0.4), 0 3px 8px rgba(51, 65, 85, 0.25);
    transform: translateY(-2px);
}
.btn-secondary:active { transform: translateY(0) scale(0.98); }

.btn-success {
    background: linear-gradient(135deg, var(--success) 0%, #059669 100%);
    color: #fff;
    box-shadow: 0 4px 12px rgba(16, 185, 129, 0.35), 0 2px 4px rgba(16, 185, 129, 0.2);
}
.btn-success:hover {
    background: linear-gradient(135deg, #059669 0%, #047857 100%);
    box-shadow: 0 6px 18px rgba(16, 185, 129, 0.45), 0 3px 8px rgba(16, 185, 129, 0.25);
    transform: translateY(-2px);
}
.btn-success:active { transform: translateY(0) scale(0.98); }

.btn-warning {
    background: linear-gradient(135deg, var(--warning) 0%, #D97706 100%);
    color: #fff;
    box-shadow: 0 4px 12px rgba(245, 158, 11, 0.35), 0 2px 4px rgba(245, 158, 11, 0.2);
}
.btn-warning:hover {
    background: linear-gradient(135deg, #D97706 0%, #B45309 100%);
    box-shadow: 0 6px 18px rgba(245, 158, 11, 0.45), 0 3px 8px rgba(245, 158, 11, 0.25);
    transform: translateY(-2px);
}
.btn-warning:active { transform: translateY(0) scale(0.98); }

.btn-outline {
    background: var(--surface);
    color: var(--text-secondary);
    border: 2px solid var(--border);
    box-shadow: var(--shadow-sm), inset 0 1px 0 rgba(255,255,255,0.5);
}
.btn-outline:hover {
    border-color: var(--accent);
    color: var(--accent);
    background: var(--accent-light);
    box-shadow: 0 6px 20px rgba(37, 99, 235, 0.15), 0 2px 6px rgba(37, 99, 235, 0.08);
    transform: translateY(-2px);
}
.btn-outline:active { transform: translateY(0) scale(0.98); }

.btn-ghost {
    background: transparent;
    color: var(--text-secondary);
    border: 2px solid transparent;
}
.btn-ghost:hover {
    background: var(--border-light);
    color: var(--text);
    border-color: var(--border);
}

.btn-danger {
    display: inline-flex; align-items: center; gap: 8px;
    background: linear-gradient(135deg, var(--danger) 0%, #DC2626 100%);
    color: #fff; font-weight: 600;
    font-size: 0.82rem; padding: 8px 16px;
    border: none; border-radius: var(--radius-xs);
    cursor: pointer; text-decoration: none;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 3px 10px rgba(239, 68, 68, 0.3), 0 1px 3px rgba(239, 68, 68, 0.2);
}
.btn-danger:hover {
    background: linear-gradient(135deg, #DC2626 0%, #B91C1C 100%);
    transform: translateY(-2px);
    box-shadow: 0 5px 16px rgba(220, 38, 38, 0.4), 0 2px 6px rgba(220, 38, 38, 0.25);
}
.btn-danger:active { transform: translateY(0) scale(0.97); }

/* Button Sizes */
.btn-lg {
    padding: 14px 32px;
    font-size: 1rem;
    border-radius: var(--radius-sm);
    font-weight: 700;
    letter-spacing: -0.02em;
}
.btn-sm {
    padding: 7px 16px;
    font-size: 0.82rem;
    border-radius: var(--radius-xs);
    font-weight: 600;
}
.btn-xs {
    padding: 4px 10px;
    font-size: 0.75rem;
    border-radius: var(--radius-xs);
    font-weight: 600;
}
.btn-block { width: 100%; justify-content: center; }

/* Icon Button */
.btn-icon {
    width: 40px;
    height: 40px;
    padding: 0;
    border-radius: var(--radius-xs);
    display: inline-flex;
    align-items: center;
    justify-content: center;
}
.btn-icon.btn-sm {
    width: 34px;
    height: 34px;
}
.btn-icon.btn-lg {
    width: 48px;
    height: 48px;
}

/* Loading State */
.btn.loading {
    pointer-events: none;
    position: relative;
    color: transparent !important;
}
.btn.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 18px;
    height: 18px;
    margin: -9px 0 0 -9px;
    border: 2.5px solid rgba(255,255,255,0.3);
    border-top-color: currentColor;
    border-radius: 50%;
    animation: btnSpin 0.7s linear infinite;
}
@keyframes btnSpin { to { transform: rotate(360deg); } }

/* =================================================================
   HEADER — Page-level
   ================================================================= */
.header {
    text-align: center;
    padding: 60px 0 52px;
    position: relative;
    animation: fadeInDown 0.6s ease-out;
}

@keyframes fadeInDown {
    from { opacity: 0; transform: translateY(-20px); }
    to { opacity: 1; transform: translateY(0); }
}

.header-mark {
    width: 64px;
    height: 64px;
    margin: 0 auto 24px;
    background: linear-gradient(135deg, var(--accent) 0%, #60A5FA 100%);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    box-shadow: 0 8px 24px rgba(37, 99, 235, 0.35);
    position: relative;
    animation: pulse 3s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { box-shadow: 0 8px 24px rgba(37, 99, 235, 0.35); }
    50% { box-shadow: 0 8px 32px rgba(37, 99, 235, 0.5); }
}

.header h1 {
    font-size: 2.5rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--text) 0%, var(--secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.03em;
    line-height: 1.2;
    margin-bottom: 12px;
}

.header .tagline {
    color: var(--text-secondary);
    font-size: 1.05rem;
    margin-top: 8px;
    font-weight: 400;
    max-width: 500px;
    margin-left: auto;
    margin-right: auto;
}

.version-badge {
    display: inline-flex;
    align-items: center;
    padding: 4px 12px;
    background: linear-gradient(135deg, var(--accent) 0%, #60A5FA 100%);
    color: #fff;
    font-size: 0.78rem;
    font-weight: 700;
    border-radius: 20px;
    letter-spacing: 0.02em;
    box-shadow: 0 2px 8px rgba(37, 99, 235, 0.3);
}

/* =================================================================
   UPLOAD CARD / DROP ZONE
   ================================================================= */
.upload-card {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--glass-border);
    padding: 44px;
    margin-bottom: 32px;
    animation: fadeInUp 0.7s ease-out 0.2s both;
}

@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}

.drop-zone {
    border: 2.5px dashed var(--border);
    border-radius: var(--radius-lg);
    padding: 64px 28px;
    text-align: center;
    cursor: pointer;
    transition: all var(--transition-slow);
    background: linear-gradient(135deg, rgba(238, 242, 255, 0.5) 0%, rgba(255, 255, 255, 0.8) 100%);
    position: relative;
    overflow: hidden;
}

.drop-zone::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.03) 0%, rgba(16, 185, 129, 0.03) 100%);
    opacity: 0;
    transition: opacity var(--transition-slow);
}

.drop-zone:hover {
    border-color: var(--accent);
    background: linear-gradient(135deg, var(--accent-light) 0%, rgba(236, 253, 245, 0.5) 100%);
    transform: translateY(-3px);
    box-shadow: 0 8px 28px rgba(37, 99, 235, 0.15);
}

.drop-zone:hover::before { opacity: 1; }

.drop-zone.dragover {
    border-color: var(--accent);
    background: linear-gradient(135deg, var(--accent-light) 0%, rgba(236, 253, 245, 0.6) 100%);
    transform: scale(1.01) translateY(-2px);
    box-shadow: 0 12px 36px rgba(37, 99, 235, 0.2);
}

.drop-zone input[type="file"] { display: none; }

.drop-icon {
    color: var(--text-muted);
    margin-bottom: 18px;
    transition: all var(--transition-slow);
    position: relative;
    z-index: 1;
}
.drop-zone:hover .drop-icon,
.drop-zone.dragover .drop-icon {
    color: var(--accent);
    transform: translateY(-4px) scale(1.08);
}

.drop-title {
    font-size: 1.1rem;
    color: var(--text);
    font-weight: 650;
    margin-bottom: 6px;
    letter-spacing: -0.01em;
    position: relative;
    z-index: 1;
}

.drop-hint {
    font-size: 0.88rem;
    color: var(--text-muted);
    position: relative;
    z-index: 1;
}

/* File Badge */
.file-badge {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 16px 22px;
    background: linear-gradient(135deg, var(--accent-light) 0%, rgba(236, 253, 245, 0.5) 100%);
    border: 1.5px solid rgba(37, 99, 235, 0.25);
    border-radius: var(--radius-sm);
    margin-top: 18px;
    animation: fadeSlideIn 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.1);
}

@keyframes fadeSlideIn { from { opacity: 0; transform: translateY(-8px) scale(0.96); } to { opacity: 1; transform: translateY(0) scale(1); } }

.file-badge-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-sm);
    background: linear-gradient(135deg, var(--accent) 0%, #60A5FA 100%);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
}

.file-badge-info { flex: 1; min-width: 0; }
.file-badge-name {
    font-weight: 650;
    font-size: 0.95rem;
    color: var(--text);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.file-badge-size { font-size: 0.82rem; color: var(--text-secondary); margin-top: 2px; }

.file-badge-remove {
    background: none;
    border: none;
    font-size: 1.4rem;
    color: var(--text-muted);
    cursor: pointer;
    padding: 8px;
    line-height: 1;
    border-radius: var(--radius-xs);
    transition: all var(--transition);
}
.file-badge-remove:hover {
    color: var(--danger);
    background: var(--danger-light);
    transform: scale(1.1);
}

.submit-area { margin-top: 28px; }

/* =================================================================
   FEATURE HIGHLIGHTS (index page)
   ================================================================= */
.features {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    margin-bottom: 48px;
}

.feature-item {
    text-align: center;
    padding: 28px 22px;
    background: var(--glass-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-radius: var(--radius);
    border: 1px solid var(--glass-border);
    transition: all var(--transition-slow);
    animation: fadeInUp 0.7s ease-out both;
    position: relative;
    overflow: hidden;
}

.feature-item:nth-child(1) { animation-delay: 0.3s; }
.feature-item:nth-child(2) { animation-delay: 0.4s; }
.feature-item:nth-child(3) { animation-delay: 0.5s; }

.feature-item::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.03) 0%, transparent 100%);
    opacity: 0;
    transition: opacity var(--transition-slow);
}

.feature-item:hover {
    border-color: rgba(37, 99, 235, 0.3);
    transform: translateY(-6px);
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.08);
}
.feature-item:hover::before { opacity: 1; }

.feature-item-icon {
    width: 52px;
    height: 52px;
    margin: 0 auto 16px;
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    z-index: 1;
    transition: transform var(--transition-slow);
}

.feature-item:hover .feature-item-icon { transform: scale(1.1) rotate(-3deg); }

.feature-item-icon.accent {
    background: linear-gradient(135deg, var(--accent-light) 0%, rgba(199, 210, 254, 0.5) 100%);
    color: var(--accent);
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.15);
}
.feature-item-icon.success {
    background: linear-gradient(135deg, var(--success-light) 0%, rgba(167, 243, 208, 0.5) 100%);
    color: var(--success);
    box-shadow: 0 4px 12px rgba(16, 185, 129, 0.15);
}
.feature-item-icon.warning {
    background: linear-gradient(135deg, var(--warning-light) 0%, rgba(253, 230, 138, 0.5) 100%);
    color: var(--warning);
    box-shadow: 0 4px 12px rgba(245, 158, 11, 0.15);
}

.feature-item h3 {
    font-size: 1rem;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 6px;
    letter-spacing: -0.01em;
    position: relative;
    z-index: 1;
}
.feature-item p { font-size: 0.85rem; color: var(--text-secondary); line-height: 1.5; position: relative; z-index: 1; }

/* =================================================================
   FOOTER
   ================================================================= */
.footer {
    text-align: center;
    padding: 20px;
    color: var(--text-muted);
    font-size: 0.82rem;
    border-top: 1px solid var(--border);
}

/* 备案信息行（独立一行，居中，图标与文字垂直对齐） */
.footer-beian {
    margin: 0 0 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
}
.footer-beian a {
    color: inherit;
    text-decoration: underline;
    display: inline-flex;
    align-items: center;
}
.footer-beian a img {
    display: block;          /* 消除 inline 图片基线间隙，确保与文字垂直居中 */
    width: 16px;
    height: 16px;
    object-fit: contain;
    margin-right: 3px;
}

/* =================================================================
   ERROR / ALERT
   ================================================================= */
.error-banner {
    background: linear-gradient(135deg, var(--danger-light) 0%, rgba(254, 202, 202, 0.5) 100%);
    border: 1.5px solid rgba(239, 68, 68, 0.25);
    color: #991B1B;
    padding: 16px 22px;
    border-radius: var(--radius-sm);
    margin-bottom: 24px;
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 0.92rem;
    animation: fadeSlideIn 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
    box-shadow: 0 4px 12px rgba(239, 68, 68, 0.1);
}
.error-banner-icon { font-size: 1.3rem; flex-shrink: 0; }

.alert { padding: 12px 20px; border-radius: var(--radius-xs); margin-bottom: 16px; font-size: 0.9rem; }
.alert-error { background: var(--danger-light); color: var(--danger); border: 1px solid rgba(239,68,68,0.2); }
.alert-success { background: var(--success-light); color: #065F46; border: 1px solid rgba(16,185,129,0.2); }

/* =================================================================
   SPINNER
   ================================================================= */
.spinner {
    display: inline-block;
    width: 18px;
    height: 18px;
    border: 2.5px solid rgba(255,255,255,0.3);
    border-top-color: #fff;
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
}

@keyframes spin { to { transform: rotate(360deg); } }

/* =================================================================
   ANNOUNCEMENT FORM STYLES (Admin)
   ================================================================= */
.ann-modal { max-width: 720px; padding: 0; overflow: hidden; width: 95%; }
.ann-modal-header {
    display: flex; align-items: center; justify-content: space-between;
    padding: 22px 28px; border-bottom: 1px solid var(--border);
    background: linear-gradient(135deg, #F8FAFC 0%, #F1F5F9 100%);
}
.ann-modal-header h3 {
    font-size: 1.15rem; font-weight: 700; color: var(--text);
    margin: 0; letter-spacing: -0.01em;
    display: flex; align-items: center;
}
.modal-close-btn {
    width: 32px; height: 32px; border-radius: 50%; border: none;
    background: var(--border-light); color: var(--text-muted);
    font-size: 1.4rem; cursor: pointer;
    display: flex; align-items: center; justify-content: center;
    transition: all var(--transition); line-height: 1;
}
.modal-close-btn:hover { background: var(--danger-light); color: var(--danger); }

.ann-form-section { margin-bottom: 18px; }
.ann-form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.flex-1 { flex: 1; }
.ann-label {
    display: block; font-size: 0.85rem; font-weight: 650;
    color: var(--text-secondary); margin-bottom: 6px; letter-spacing: -0.01em;
}
.required { color: var(--danger); margin-left: 2px; }
.ann-input, .ann-select, .ann-textarea {
    width: 100%; padding: 10px 14px;
    border: 1.5px solid var(--border); border-radius: var(--radius-xs);
    font-size: 0.9rem; font-family: inherit; outline: none;
    transition: all var(--transition); color: var(--text);
    background: var(--surface);
}
.ann-input:focus, .ann-select:focus, .ann-textarea:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(99,102,241,0.08);
}
.ann-textarea {
    resize: vertical; line-height: 1.7; min-height: 100px;
    white-space: pre-wrap; word-wrap: break-word;
}
.ann-form-actions {
    display: flex; gap: 12px; justify-content: flex-end;
    padding: 20px 28px; border-top: 1px solid var(--border-light);
    background: #FAFBFC;
}
.ann-form-body { padding: 24px 28px; max-height: 60vh; overflow-y: auto; }

/* Color Picker Grid */
.color-picker-grid { display: grid; grid-template-columns: repeat(6, 1fr); gap: 8px; }
.color-option {
    display: flex; flex-direction: column; align-items: center; gap: 5px;
    padding: 10px 6px; border-radius: var(--radius-sm);
    border: 2px solid transparent; cursor: pointer;
    transition: all var(--transition); position: relative;
}
.color-option:hover { transform: translateY(-2px); box-shadow: var(--shadow-sm); }
.color-option.selected {
    border-color: var(--accent); box-shadow: 0 0 0 3px rgba(99,102,241,0.15);
    transform: scale(1.05);
}
.color-swatch {
    width: 32px; height: 32px; border-radius: 50%;
    box-shadow: inset 0 -2px 4px rgba(0,0,0,0.1), 0 2px 6px rgba(0,0,0,0.08);
    transition: transform var(--transition);
}
.color-option:hover .color-swatch { transform: scale(1.1); }
.color-name { font-size: 0.72rem; font-weight: 600; color: var(--text-muted); text-align: center; }
.color-option.selected .color-name { color: var(--accent); }

.color-warning { background: linear-gradient(135deg, #FCD34D 0%, #F59E0B 100%); }
.color-info { background: linear-gradient(135deg, #60A5FA 0%, #2563EB 100%); }
.color-success { background: linear-gradient(135deg, #6EE7B7 0%, #10B981 100%); }
.color-danger { background: linear-gradient(135deg, #FCA5A5 0%, #EF4444 100%); }
.color-purple { background: linear-gradient(135deg, #C4B5FD 0%, #8B5CF6 100%); }
.color-dark { background: linear-gradient(135deg, #D1D5DB 0%, #6B7280 100%); }

/* User Multi-Select */
.user-select-wrapper { position: relative; }
.user-select-header {
    display: flex; align-items: center; justify-content: space-between;
    padding: 11px 14px; border: 1.5px solid var(--border);
    border-radius: var(--radius-xs); cursor: pointer;
    background: var(--surface); transition: all var(--transition);
    min-height: 42px;
}
.user-select-header:hover { border-color: var(--accent); }
.user-selected-text {
    font-size: 0.88rem; color: var(--text); font-weight: 500;
    overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.user-chevron { color: var(--text-muted); transition: transform 0.2s; flex-shrink: 0; margin-left: 8px; }
.user-select-dropdown {
    position: absolute; top: calc(100% + 4px); left: 0; right: 0;
    background: var(--surface); border: 1.5px solid var(--border);
    border-radius: var(--radius-sm); box-shadow: var(--shadow-lg);
    z-index: 10001; max-height: 320px; display: flex; flex-direction: column;
}
.user-select-search {
    display: flex; align-items: center; gap: 8px;
    padding: 10px 14px; border-bottom: 1px solid var(--border-light);
}
.user-select-search svg { color: var(--text-muted); flex-shrink: 0; }
.user-select-search input {
    border: none; outline: none; font-size: 0.85rem; width: 100%;
    color: var(--text); background: transparent;
}
.user-select-actions {
    display: flex; align-items: center; gap: 8px;
    padding: 8px 14px; border-bottom: 1px solid var(--border-light);
    background: #FAFBFC;
}
.user-action-btn {
    padding: 4px 12px; border: 1px solid var(--border); border-radius: 20px;
    background: var(--surface); font-size: 0.78rem; font-weight: 600;
    color: var(--text-secondary); cursor: pointer; transition: all var(--transition);
}
.user-action-btn:hover { background: var(--accent-light); color: var(--accent); border-color: var(--accent); }
.user-count { margin-left: auto; font-size: 0.78rem; color: var(--text-muted); font-weight: 600; }
#selected-count { color: var(--accent); font-weight: 700; }

.user-list { overflow-y: auto; padding: 6px; }
.user-item {
    display: flex; align-items: center; gap: 12px;
    padding: 9px 12px; border-radius: var(--radius-xs);
    cursor: pointer; transition: all 0.15s ease;
    position: relative;
}
.user-item:hover { background: var(--accent-light); }
.user-item input[type="checkbox"] { display: none; }
.user-avatar {
    width: 34px; height: 34px; border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    font-weight: 700; font-size: 0.85rem; color: #fff;
    background: linear-gradient(135deg, var(--accent) 0%, #60A5FA 100%);
    flex-shrink: 0;
}
.user-info { flex: 1; min-width: 0; }
.user-name { display: block; font-weight: 600; font-size: 0.85rem; color: var(--text); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.user-email { display: block; font-size: 0.76rem; color: var(--text-muted); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.user-check {
    width: 20px; height: 20px; border-radius: 50%;
    border: 2px solid var(--border); flex-shrink: 0;
    transition: all 0.15s ease; display: flex; align-items: center; justify-content: center;
}
.user-item input:checked ~ .user-check {
    border-color: var(--accent); background: var(--accent);
}
.user-item input:checked ~ .user-check::after {
    content: ''; width: 6px; height: 10px;
    border: solid #fff; border-width: 0 2px 2px 0;
    transform: rotate(45deg) translate(-1px, -1px);
}

/* Table Type/Theme Badges */
.type-badge { display: inline-block; padding: 3px 10px; border-radius: 20px; font-size: 0.78rem; font-weight: 600; }
.type-banner { background: #DBEAFE; color: #1E40AF; }
.type-popup { background: #EDE9FE; color: #5B21B6; }

.theme-dot { display: inline-block; width: 14px; height: 14px; border-radius: 50%; vertical-align: middle; box-shadow: 0 1px 3px rgba(0,0,0,0.15); }
.theme-warning { background: linear-gradient(135deg, #FCD34D, #F59E0B); }
.theme-info { background: linear-gradient(135deg, #60A5FA, #2563EB); }
.theme-success { background: linear-gradient(135deg, #6EE7B7, #10B981); }
.theme-danger { background: linear-gradient(135deg, #FCA5A5, #EF4444); }
.theme-purple { background: linear-gradient(135deg, #C4B5FD, #8B5CF6); }
.theme-dark { background: linear-gradient(135deg, #D1D5DB, #6B7280); }

.target-badge { background: #FEF3C7; color: #92400E; font-size: 0.78rem; font-weight: 600; padding: 2px 8px; border-radius: 12px; }
.target-all { color: var(--success); font-weight: 700; font-size: 0.85rem; }
.content-cell { max-width: 200px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

/* =================================================================
   ANNOUNCEMENT COLOR PALETTE (CSS custom properties)
   ================================================================= */
[data-ann-color="warning"] {
  --ann-bg: linear-gradient(135deg, #FFF8EB 0%, #FEF0D0 50%, #FCE4A0 100%);
  --ann-border: #E5A93D;
  --ann-text: #7A4E0E;
  --ann-text-border: rgba(122,78,14,0.12);
  --ann-link: #2563EB;
  --ann-close: #7A4E0E;
}
[data-ann-color="info"] {
  --ann-bg: linear-gradient(135deg, #EFF6FF 0%, #DBEAFE 50%, #BFDBFE 100%);
  --ann-border: #2563EB;
  --ann-text: #1E40AF;
  --ann-text-border: rgba(30,64,175,0.12);
  --ann-link: #2563EB;
  --ann-close: #1E40AF;
}
[data-ann-color="success"] {
  --ann-bg: linear-gradient(135deg, #ECFBF5 0%, #D5F5E8 50%, #B0ECD4 100%);
  --ann-border: #3CAD7D;
  --ann-text: #1A5C3E;
  --ann-text-border: rgba(26,92,62,0.12);
  --ann-link: #3CAD7D;
  --ann-close: #1A5C3E;
}
[data-ann-color="danger"] {
  --ann-bg: linear-gradient(135deg, #FFF0F0 0%, #FEE0E0 50%, #FCCACA 100%);
  --ann-border: #E06060;
  --ann-text: #7A2828;
  --ann-text-border: rgba(122,40,40,0.12);
  --ann-link: #E06060;
  --ann-close: #7A2828;
}
[data-ann-color="purple"] {
  --ann-bg: linear-gradient(135deg, #F6F3FF 0%, #EBE4FF 50%, #DACFF8 100%);
  --ann-border: #8B7CE0;
  --ann-text: #463A7A;
  --ann-text-border: rgba(70,58,122,0.12);
  --ann-link: #8B7CE0;
  --ann-close: #463A7A;
}
[data-ann-color="dark"] {
  --ann-bg: linear-gradient(135deg, #F5F5F7 0%, #E8E8ED 50%, #D5D5DC 100%);
  --ann-border: #6B6B7B;
  --ann-text: #383844;
  --ann-text-border: rgba(56,56,68,0.12);
  --ann-link: #6B6B7B;
  --ann-close: #383844;
}

/* =================================================================
   POPUP THEME COLORS (used by popup-header, footer, etc.)
   ================================================================= */
[data-popup-color="warning"] {
  --popup-header-bg: linear-gradient(135deg, #FFF8EB 0%, #FEF0D0 100%);
  --popup-header-border: #E5A93D;
  --popup-header-text: #78350F;
  --popup-header-icon: #D97706;
  --popup-close-bg: rgba(254,240,208,0.75);
  --popup-close-hover-bg: #FCE4A0;
  --popup-close-hover-color: #5C3808;
  --popup-footer-bg: #FFFBF3;
  --popup-body-text: #7A4E0E;
  --popup-accent-border: #F59E0B;
}
[data-popup-color="info"] {
  --popup-header-bg: linear-gradient(135deg, #F0F5FF 0%, #E0EAFF 100%);
  --popup-header-border: #5C8AEA;
  --popup-header-text: #2C478B;
  --popup-header-icon: #4A6EC8;
  --popup-close-bg: rgba(224,234,255,0.75);
  --popup-close-hover-bg: #C5D8FC;
  --popup-close-hover-color: #1E3368;
  --popup-footer-bg: #F5F8FF;
  --popup-body-text: #2C478B;
  --popup-accent-border: #2563EB;
}
[data-popup-color="success"] {
  --popup-header-bg: linear-gradient(135deg, #ECFBF5 0%, #D5F5E8 100%);
  --popup-header-border: #3CAD7D;
  --popup-header-text: #1A5C3E;
  --popup-header-icon: #2E9B6A;
  --popup-close-bg: rgba(213,245,232,0.75);
  --popup-close-hover-bg: #B0ECD4;
  --popup-close-hover-color: #0F3D28;
  --popup-footer-bg: #F2FCF8;
  --popup-body-text: #1A5C3E;
  --popup-accent-border: #10B981;
}
[data-popup-color="danger"] {
  --popup-header-bg: linear-gradient(135deg, #FFF0F0 0%, #FEE0E0 100%);
  --popup-header-border: #E06060;
  --popup-header-text: #7A2828;
  --popup-header-icon: #C84848;
  --popup-close-bg: rgba(254,224,224,0.75);
  --popup-close-hover-bg: #FCCACA;
  --popup-close-hover-color: #5C1A1A;
  --popup-footer-bg: #FFF5F5;
  --popup-body-text: #7A2828;
  --popup-accent-border: #EF4444;
}
[data-popup-color="purple"] {
  --popup-header-bg: linear-gradient(135deg, #F6F3FF 0%, #EBE4FF 100%);
  --popup-header-border: #8B7CE0;
  --popup-header-text: #463A7A;
  --popup-header-icon: #6E5EC0;
  --popup-close-bg: rgba(235,228,255,0.75);
  --popup-close-hover-bg: #DACFF8;
  --popup-close-hover-color: #2E2460;
  --popup-footer-bg: #F8F6FF;
  --popup-body-text: #463A7A;
  --popup-accent-border: #8B5CF6;
}
[data-popup-color="dark"] {
  --popup-header-bg: linear-gradient(135deg, #F5F5F7 0%, #E8E8ED 100%);
  --popup-header-border: #6B6B7B;
  --popup-header-text: #383844;
  --popup-header-icon: #555566;
  --popup-close-bg: rgba(232,232,237,0.75);
  --popup-close-hover-bg: #D5D5DC;
  --popup-close-hover-color: #222230;
  --popup-footer-bg: #F8F8FA;
  --popup-body-text: #383844;
  --popup-accent-border: #6B7280;
}

/* =================================================================
   BANNER ANNOUNCEMENTS
   ================================================================= */
.banner-announcements {
    background: linear-gradient(135deg, #FFFFFF 0%, #F8FAFF 50%, #F0F4FF 100%);
    border: 1px solid rgba(37, 99, 235, 0.08);
    margin: 10px 14px 0;
    border-radius: 18px;
    padding: 0;
    overflow: hidden;
    position: relative;
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1), box-shadow 0.3s ease;
    display: block !important;
    visibility: visible !important;
    opacity: 1 !important;
    z-index: 99;
    box-shadow: 0 4px 24px rgba(37, 99, 235, 0.06), 0 1px 3px rgba(0,0,0,0.03);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}
.banner-announcements::before {
    content: '';
    position: absolute;
    top: 0;
    left: 18px;
    right: 18px;
    height: 3px;
    background: linear-gradient(90deg, #2563EB, #60A5FA, rgba(37,99,235,0.2));
    border-radius: 0 0 3px 3px;
}
.banner-inner {
    display: flex;
    align-items: flex-start;
    padding: 10px 44px 10px 22px;
    position: relative;
}
.banner-scroll {
    display: flex;
    flex-direction: column;
    gap: 6px;
    flex: 1;
}
.banner-item {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.84rem;
    font-weight: 530;
    padding: 8px 14px;
    border-radius: 10px;
    background: rgba(255,255,255,0.78);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    color: var(--ann-text, var(--text));
    line-height: 1.5;
    border: 1px solid var(--ann-text-border, rgba(148,163,184,0.15));
    box-shadow: inset 3px 0 0 0 var(--ann-border, rgba(148,163,184,0.4));
    transition: background 0.2s ease, box-shadow 0.2s ease;
}
.banner-item:hover {
    background: rgba(255,255,255,0.92);
    box-shadow: inset 3px 0 0 0 var(--ann-border, rgba(148,163,184,0.4)), 0 2px 8px rgba(0,0,0,0.04);
}
.banner-icon { display: flex; align-items: center; flex-shrink: 0; }
.banner-content { line-height: 1.5; word-break: break-word; }
.banner-content br { display: block; content: ""; margin-top: 2px; }
.banner-link {
    font-weight: 650;
    margin-left: 2px;
    text-decoration: none;
    flex-shrink: 0;
    padding: 3px 10px;
    border-radius: 20px;
    background: rgba(255,255,255,0.7);
    transition: all var(--transition);
    color: var(--ann-link, var(--accent));
    font-size: 0.8rem;
    border: 1px solid rgba(255,255,255,0.6);
}
.banner-link:hover {
    background: #fff;
    box-shadow: 0 1px 4px rgba(0,0,0,0.08);
}
.banner-close {
    position: absolute;
    right: 12px;
    top: 12px;
    background: rgba(255,255,255,0.8);
    border: 1px solid rgba(148, 163, 184, 0.15);
    width: 26px;
    height: 26px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--transition);
    flex-shrink: 0;
    z-index: 10;
    color: var(--ann-close, #94A3B8);
    opacity: 0.6;
}
.banner-close:hover {
    opacity: 1;
    background: #fff;
    border-color: rgba(148, 163, 184, 0.3);
    transform: scale(1.1);
    box-shadow: 0 2px 8px rgba(0,0,0,0.06);
}

.banner-item-close {
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 22px;
    height: 22px;
    border-radius: 50%;
    border: none;
    background: rgba(255,255,255,0.6);
    color: var(--ann-text, #94A3B8);
    cursor: pointer;
    opacity: 0.5;
    transition: all 0.2s ease;
    padding: 0;
    margin-left: auto;
}
.banner-item-close:hover {
    opacity: 1;
    background: rgba(255,255,255,0.9);
    transform: scale(1.15);
}

/* =================================================================
   POPUP ANNOUNCEMENTS
   ================================================================= */
#popup-container { z-index: 99999; }
.popup-overlay {
    position: fixed;
    inset: 0;
    background: rgba(15, 23, 42, 0.65);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    z-index: 99998;
    animation: popupFadeIn 0.25s ease-out;
}
@keyframes popupFadeIn { from { opacity: 0; } to { opacity: 1; } }
.popup-card {
    background: var(--surface);
    border-radius: var(--radius-lg);
    box-shadow: 0 25px 60px rgba(0,0,0,0.25), 0 10px 20px rgba(0,0,0,0.15);
    max-width: 520px;
    width: 100%;
    overflow: hidden;
    animation: popupSlideUp 0.35s cubic-bezier(0.34, 1.56, 0.64, 1);
    border: 1px solid rgba(255,255,255,0.8);
}
@keyframes popupSlideUp {
    from { opacity: 0; transform: translateY(30px) scale(0.95); }
    to { opacity: 1; transform: translateY(0) scale(1); }
}
.popup-card {
    border-top: 3px solid var(--popup-accent-border, #F59E0B);
}
.popup-header {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 22px 26px 16px;
    background: var(--popup-header-bg, linear-gradient(135deg, #FEF3C7 0%, #FDE68A 100%));
    border-bottom: 2px solid var(--popup-header-border, #F59E0B);
    position: relative;
}
.popup-title-icon { color: var(--popup-header-icon, #D97706); flex-shrink: 0; display: flex; }
.popup-header strong {
    font-size: 1.08rem;
    color: var(--popup-header-text, #78350F);
    letter-spacing: -0.01em;
    flex: 1;
}
.popup-close-btn {
    background: var(--popup-close-bg, rgba(255,255,255,0.75));
    border: 1.5px solid var(--popup-header-border, rgba(245, 158, 11, 0.3));
    width: 32px;
    height: 32px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    color: var(--popup-header-text, #92400E);
    transition: all var(--transition);
    flex-shrink: 0;
}
.popup-close-btn:hover {
    background: #fff;
    border-color: var(--popup-header-border, #F59E0B);
    color: var(--popup-header-text, #78350F);
    transform: rotate(90deg);
}
.popup-body {
    padding: 24px 26px;
    font-size: 0.96rem;
    line-height: 1.85;
    color: var(--popup-body-text, var(--text-secondary));
    white-space: pre-wrap;
    word-break: break-word;
}
.popup-footer {
    padding: 18px 26px 22px;
    display: flex;
    justify-content: flex-end;
    gap: 10px;
    border-top: 1px solid var(--popup-header-border, var(--border-light));
    background: var(--popup-footer-bg, #FAFBFC);
}
.popup-action-btn { text-decoration: none !important; }

/* =================================================================
   ADMIN MODAL
   ================================================================= */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(15, 23, 42, 0.6);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    z-index: 10000;
}
.modal-card {
    background: var(--surface);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    width: 100%;
    max-width: 600px;
    max-height: 90vh;
    overflow-y: auto;
    padding: 28px;
}
.modal-card h3 { font-size: 1.2rem; margin-bottom: 20px; color: var(--text); }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.form-actions { display: flex; gap: 10px; justify-content: flex-end; margin-top: 20px; }

.admin-toolbar { display: flex; justify-content: space-between; align-items: center; margin-bottom: 20px; }
.ann-link { color: var(--accent); font-size: 0.82rem; }

/* =================================================================
   REPORT PAGE STYLES
   ================================================================= */
.report-container { max-width: 1040px; margin: 0 auto; }

.report-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 24px 0;
    margin-bottom: 32px;
    border-bottom: 2px solid var(--border-light);
    gap: 18px;
    flex-wrap: wrap;
    position: relative;
    animation: fadeInDown 0.5s ease-out;
}

.report-header::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 120px;
    height: 2px;
    background: linear-gradient(90deg, var(--accent) 0%, transparent 100%);
}

.report-header-left { display: flex; align-items: center; gap: 18px; min-width: 0; }

.report-header h1 {
    font-size: 1.45rem;
    font-weight: 750;
    background: linear-gradient(135deg, var(--text) 0%, var(--secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.02em;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.report-header-right { display: flex; gap: 12px; flex-shrink: 0; }

.report-meta {
    font-size: 0.82rem;
    color: var(--text-muted);
    width: 100%;
    margin-top: 4px;
}

/* Score Card */
.score-card {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--glass-border);
    padding: 36px 40px;
    margin-bottom: 28px;
    display: flex;
    align-items: center;
    gap: 40px;
    flex-wrap: wrap;
    animation: fadeInUp 0.6s ease-out 0.2s both;
}

.score-ring {
    width: 150px;
    height: 150px;
    border-radius: 50%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: #fff;
    flex-shrink: 0;
    box-shadow: 0 12px 32px rgba(0,0,0,0.18);
    position: relative;
    transition: transform var(--transition-slow);
}
.score-ring:hover { transform: scale(1.05); }

.score-ring.high { background: linear-gradient(135deg, #EF4444 0%, #DC2626 50%, #B91C1C 100%); }
.score-ring.mid { background: linear-gradient(135deg, #F97316 0%, #EA580C 50%, #C2410C 100%); }
.score-ring.low { background: linear-gradient(135deg, #F59E0B 0%, #D97706 50%, #B45309 100%); }
.score-ring.safe { background: linear-gradient(135deg, #10B981 0%, #059669 50%, #047857 100%); }

.score-ring-value {
    font-size: 2.4rem;
    font-weight: 800;
    line-height: 1;
    letter-spacing: -0.02em;
}
.score-ring-label {
    font-size: 0.82rem;
    opacity: 0.95;
    margin-top: 5px;
    font-weight: 550;
}

.score-info h2 {
    font-size: 1.4rem;
    font-weight: 750;
    background: linear-gradient(135deg, var(--text) 0%, var(--secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 20px;
    letter-spacing: -0.02em;
}

/* Report Stats Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 14px;
}

.stat-card {
    text-align: center;
    padding: 18px 14px;
    background: linear-gradient(135deg, rgba(248, 250, 252, 0.8) 0%, rgba(241, 245, 249, 0.6) 100%);
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-light);
    transition: all var(--transition);
}
.stat-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.06);
    border-color: rgba(37, 99, 235, 0.2);
}

.stat-card-value {
    font-size: 1.65rem;
    font-weight: 750;
    background: linear-gradient(135deg, var(--text) 0%, var(--accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1.2;
    letter-spacing: -0.02em;
}
.stat-card-label {
    font-size: 0.78rem;
    color: var(--text-secondary);
    margin-top: 3px;
    font-weight: 550;
}

/* Section Titles */
.section-title {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 18px;
    letter-spacing: -0.01em;
    display: flex;
    align-items: center;
    gap: 10px;
}

.section-title::before {
    content: '';
    width: 4px;
    height: 20px;
    background: linear-gradient(180deg, var(--accent) 0%, #60A5FA 100%);
    border-radius: 2px;
}

/* Chart Cards */
.chart-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
    margin-bottom: 28px;
}

.chart-card {
    background: var(--glass-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-radius: var(--radius);
    border: 1px solid var(--glass-border);
    box-shadow: var(--shadow);
    padding: 28px;
    animation: fadeInUp 0.6s ease-out both;
    transition: transform var(--transition), box-shadow var(--transition);
}
.chart-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.chart-card.full-width { grid-column: 1 / -1; }
.chart-card canvas { max-height: 300px; }

/* Legend */
.legend-bar {
    background: var(--glass-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-radius: var(--radius);
    border: 1px solid var(--glass-border);
    box-shadow: var(--shadow);
    padding: 26px 28px;
    margin-bottom: 28px;
    animation: fadeInUp 0.6s ease-out 0.3s both;
}

.legend-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 14px 28px;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 0.88rem;
    color: var(--text-secondary);
    padding: 8px 12px;
    border-radius: var(--radius-xs);
    transition: all var(--transition);
}
.legend-item:hover {
    background: var(--border-light);
    transform: translateX(4px);
}

.legend-dot {
    width: 16px;
    height: 16px;
    border-radius: 5px;
    flex-shrink: 0;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.1);
}
.legend-dot.human { background: linear-gradient(135deg, #10B981 0%, #059669 100%); }
.legend-dot.mixed { background: linear-gradient(135deg, #F59E0B 0%, #D97706 100%); }
.legend-dot.likely-ai { background: linear-gradient(135deg, #F97316 0%, #EA580C 100%); }
.legend-dot.ai { background: linear-gradient(135deg, #EF4444 0%, #DC2626 100%); }

/* Annotation Section */
.annotation-section {
    background: var(--glass-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-radius: var(--radius);
    border: 1px solid var(--glass-border);
    box-shadow: var(--shadow);
    padding: 28px;
    margin-bottom: 28px;
    font-size: 1rem;
    line-height: 1.9;
    color: var(--text);
    animation: fadeInUp 0.6s ease-out 0.4s both;
}

.annotation-hint {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 22px;
    padding: 12px 16px;
    background: var(--border-light);
    border-radius: var(--radius-xs);
    border-left: 3px solid var(--accent);
}

/* Chapter dividers */
.chapter-divider {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 14px 20px;
    margin: 28px 0 14px;
    background: linear-gradient(135deg, rgba(248, 250, 252, 0.9) 0%, rgba(241, 245, 249, 0.7) 100%);
    border-left: 4px solid var(--accent);
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
}
.chapter-divider:first-child { margin-top: 0; }

.chapter-label {
    font-weight: 700;
    font-size: 0.95rem;
    color: var(--text);
    letter-spacing: -0.01em;
}

.chapter-rate {
    font-size: 0.82rem;
    color: var(--text-secondary);
    background: var(--surface);
    padding: 5px 14px;
    border-radius: 20px;
    font-weight: 650;
    border: 1.5px solid var(--border);
    box-shadow: var(--shadow-xs);
}

/* Section dividers */
.section-divider {
    padding: 10px 18px;
    margin: 16px 0 8px;
    background: linear-gradient(90deg, rgba(250, 251, 252, 0.9) 0%, transparent 100%);
    border-left: 3px solid #60A5FA;
    border-radius: 0 5px 5px 0;
}
.section-divider.section-level-2 { margin-left: 24px; }
.section-divider.section-level-3 { margin-left: 48px; border-left-color: #CBD5E1; }

.section-label { font-weight: 650; font-size: 0.85rem; color: var(--text-secondary); }

/* Colored sentence spans */
.annotated-sentence {
    display: inline;
    padding: 3px 6px;
    border-radius: 4px;
    line-height: 2.2;
    cursor: help;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
}
.annotated-sentence:hover {
    filter: brightness(0.9);
    transform: scale(1.02);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.annotated-sentence.human {
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.18) 0%, rgba(16, 185, 129, 0.1) 100%);
    border-bottom: 2.5px solid rgba(16, 185, 129, 0.5);
}
.annotated-sentence.mixed {
    background: linear-gradient(135deg, rgba(245, 158, 11, 0.18) 0%, rgba(245, 158, 11, 0.1) 100%);
    border-bottom: 2.5px solid rgba(245, 158, 11, 0.5);
}
.annotated-sentence.likely-ai {
    background: linear-gradient(135deg, rgba(249, 115, 22, 0.18) 0%, rgba(249, 115, 22, 0.1) 100%);
    border-bottom: 2.5px solid rgba(249, 115, 22, 0.5);
}
.annotated-sentence.ai {
    background: linear-gradient(135deg, rgba(239, 68, 68, 0.18) 0%, rgba(239, 68, 68, 0.1) 100%);
    border-bottom: 2.5px solid rgba(239, 68, 68, 0.5);
}

/* Paragraph container with sentence-level annotations */
.para-block {
    display: block;
    margin: 6px 0;
    padding: 4px 0;
}

/* Heading line (no color, bold for section headings) */
.heading-line {
    display: block;
    margin: 8px 0 4px 0;
    padding: 2px 0;
    font-weight: 700;
    color: var(--text, #1E293B);
}

/* Caption line (no color, no bold for figure/table captions) */
.caption-line {
    display: block;
    margin: 4px 0;
    padding: 1px 0;
    font-weight: 400;
    font-style: italic;
    color: var(--text-secondary, #64748B);
}

/* Chapter Details Table */
.detail-section {
    background: var(--glass-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-radius: var(--radius);
    border: 1px solid var(--glass-border);
    box-shadow: var(--shadow);
    padding: 28px;
    margin-bottom: 28px;
    overflow-x: auto;
    animation: fadeInUp 0.6s ease-out 0.5s both;
}

.detail-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.88rem;
}

.detail-table th {
    background: linear-gradient(135deg, rgba(248, 250, 252, 0.95) 0%, rgba(241, 245, 249, 0.8) 100%);
    padding: 14px 18px;
    text-align: left;
    font-weight: 700;
    color: var(--text-secondary);
    border-bottom: 2.5px solid var(--border);
    white-space: nowrap;
    font-size: 0.83rem;
    letter-spacing: -0.01em;
}

.detail-table td {
    padding: 14px 18px;
    border-bottom: 1px solid var(--border-light);
    white-space: nowrap;
    color: var(--text);
}

.detail-table tbody tr { transition: all var(--transition); }
.detail-table tbody tr:hover {
    background: linear-gradient(90deg, rgba(238, 242, 255, 0.5) 0%, transparent 100%);
    transform: translateX(4px);
}
.detail-table tbody tr:last-child td { border-bottom: none; }

/* Report bottom CTA */
.report-bottom-cta {
    text-align: center;
    padding: 16px 0 48px;
    animation: fadeInUp 0.6s ease-out 0.6s both;
}

/* =================================================================
   NAVBAR
   ================================================================= */
.navbar {
    background: rgba(255,255,255,0.85);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border);
    position: sticky; top: 0; z-index: 200;
    box-shadow: var(--shadow-sm);
}
.nav-container {
    max-width: 1200px; margin: 0 auto;
    display: flex; align-items: center; justify-content: space-between;
    padding: 0 24px; height: 56px;
}
.nav-logo {
    font-size: 1.15rem; font-weight: 700; color: var(--accent);
    text-decoration: none; letter-spacing: -0.01em;
}
.nav-links {
    display: flex; align-items: center; gap: 4px;
    flex-wrap: nowrap;
}
.nav-links a {
    text-decoration: none; color: var(--text-secondary); font-size: 0.88rem;
    padding: 8px 12px; border-radius: var(--radius-xs);
    transition: all var(--transition); font-weight: 500;
    white-space: nowrap;
}
.nav-links a:hover { background: var(--accent-light); color: var(--accent); }
.nav-user { display: flex; align-items: center; gap: 8px; margin-left: 12px; flex-shrink: 0; }
.nav-username { font-weight: 600; color: var(--text); font-size: 0.88rem; white-space: nowrap; }
.nav-admin-btn {
    background: var(--warning); color: #fff !important;
    padding: 5px 12px !important; border-radius: 20px; font-size: 0.78rem !important;
    white-space: nowrap;
}
.nav-logout { color: var(--danger) !important; font-size: 0.82rem !important; white-space: nowrap; }
.nav-login-btn {
    background: linear-gradient(135deg, var(--accent) 0%, #60A5FA 100%);
    color: #fff !important;
    border-radius: var(--radius-xs);
    white-space: nowrap;
    padding: 7px 16px !important;
    font-weight: 700 !important;
    box-shadow: 0 3px 10px rgba(37, 99, 235, 0.3), 0 1px 3px rgba(37, 99, 235, 0.2),
                inset 0 1px 0 rgba(255,255,255,0.15);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1) !important;
}
.nav-login-btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 5px 16px rgba(37, 99, 235, 0.45), 0 2px 6px rgba(37, 99, 235, 0.25),
                inset 0 1px 0 rgba(255,255,255,0.2) !important;
}

.nav-register-btn {
    border: 2px solid var(--accent);
    color: var(--accent) !important;
    border-radius: var(--radius-xs);
    white-space: nowrap;
    padding: 7px 16px !important;
    font-weight: 700 !important;
    background: transparent !important;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1) !important;
}
.nav-register-btn:hover {
    background: linear-gradient(135deg, var(--accent) 0%, #60A5FA 100%) !important;
    color: #fff !important;
    box-shadow: 0 3px 10px rgba(37, 99, 235, 0.35), 0 1px 3px rgba(37, 99, 235, 0.2);
    transform: translateY(-1px);
}

/* =================================================================
   AUTH PAGES
   ================================================================= */
.auth-container { display: flex; justify-content: center; align-items: center; min-height: 70vh; padding: 40px 20px; }
.auth-card {
    background: var(--surface); border-radius: var(--radius-lg);
    padding: 40px 36px; width: 100%; max-width: 440px;
    box-shadow: var(--shadow-lg); border: 1px solid var(--border);
}
.auth-card h2 { font-size: 1.5rem; margin-bottom: 4px; }
.auth-subtitle { color: var(--text-muted); font-size: 0.9rem; margin-bottom: 24px; }
.auth-form .form-group { margin-bottom: 18px; }
.auth-form label { display: block; font-weight: 600; font-size: 0.88rem; margin-bottom: 6px; color: var(--text-secondary); }
.auth-form input[type="text"],
.auth-form input[type="password"],
.auth-form input[type="email"] {
    width: 100%; padding: 10px 14px;
    border: 1.5px solid var(--border); border-radius: var(--radius-xs);
    font-size: 0.94rem; transition: border var(--transition); outline: none;
}
.auth-form input:focus { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(99,102,241,0.1); }
.form-check { display: flex; align-items: center; }
.check-label { display: flex !important; align-items: center; gap: 8px; cursor: pointer; font-weight: 500 !important; }
.check-label input[type="checkbox"] { width: 16px; height: 16px; accent-color: var(--accent); }
.auth-footer { text-align: center; margin-top: 20px; color: var(--text-muted); font-size: 0.88rem; }
.auth-footer a { color: var(--accent); font-weight: 600; }

.admin-login-card { border-top: 3px solid var(--warning); }
.admin-login-header { text-align: center; margin-bottom: 8px; }
.admin-login-icon { display: flex; justify-content: center; margin-bottom: 10px; color: var(--accent); }
.admin-login-header p { color: var(--text-muted); font-size: 0.88rem; }

/* =================================================================
   INDEX PAGE — Hero & Features
   ================================================================= */
.hero { text-align: center; padding: 80px 20px 60px; }
.hero-title { font-size: 2.8rem; font-weight: 800; margin-bottom: 12px; }
.gradient-text { background: linear-gradient(135deg, var(--accent) 0%, #8B5CF6 60%, #EC4899 100%); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
.hero-desc { font-size: 1.1rem; color: var(--text-secondary); line-height: 1.8; margin-bottom: 32px; }
.hero-actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
.features-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 20px; max-width: 1000px; margin: 0 auto 60px; padding: 0 20px; }
.feature-card {
    background: var(--surface); border: 1px solid var(--border);
    border-radius: var(--radius); padding: 28px 24px;
    transition: all var(--transition-slow);
}
.feature-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: var(--accent); }
.feature-icon { display: flex; margin-bottom: 14px; color: var(--accent); }
.feature-card h3 { font-size: 1.1rem; margin-bottom: 8px; }
.feature-card p { color: var(--text-secondary); font-size: 0.9rem; line-height: 1.6; }

/* =================================================================
   HOME PAGE
   ================================================================= */
.home-container { max-width: 1000px; margin: 0 auto; padding: 32px 20px; }

/* Home stat cards (flex layout, different from report stat-card) */
.home-stats-row { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 20px; margin-bottom: 32px; }

.home-stat-card {
    display: flex; align-items: center; gap: 20px;
    background: var(--surface); border: 1px solid var(--border);
    border-radius: var(--radius); padding: 24px 28px;
    box-shadow: var(--shadow); transition: all var(--transition);
}
.home-stat-card:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); }
.home-stat-icon { display: flex; color: var(--accent); }
.home-stat-value { font-size: 2rem; font-weight: 700; color: var(--accent); line-height: 1.2; }
.home-stat-label { font-size: 0.88rem; color: var(--text-muted); }

.quick-actions { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 16px; margin-bottom: 32px; }
.action-card {
    display: block; text-decoration: none;
    background: var(--surface); border: 1px solid var(--border);
    border-radius: var(--radius); padding: 24px;
    transition: all var(--transition);
}
.action-card:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); border-color: var(--accent); }
.action-icon { display: flex; margin-bottom: 12px; color: var(--accent); }
.action-card h3 { font-size: 1rem; color: var(--text); margin-bottom: 4px; }
.action-card p { font-size: 0.84rem; color: var(--text-muted); }
.section { margin-bottom: 32px; }
.section-title-home { font-size: 1.15rem; font-weight: 700; margin-bottom: 16px; color: var(--text); }

/* =================================================================
   TABS
   ================================================================= */
.tabs { display: flex; gap: 0; margin-bottom: 24px; border-bottom: 2px solid var(--border); }
.tab-btn {
    padding: 12px 24px; border: none; background: none;
    font-size: 0.95rem; font-weight: 600; color: var(--text-muted);
    cursor: pointer; border-bottom: 3px solid transparent;
    transition: all var(--transition); margin-bottom: -2px;
}
.tab-btn.active { color: var(--accent); border-bottom-color: var(--accent); }
.tab-btn:hover { color: var(--text-secondary); }
.tab-content { display: none; }
.tab-content.active { display: block; }

/* =================================================================
   TEXT INPUT
   ================================================================= */
.text-input-card {
    background: var(--surface); border: 1px solid var(--border);
    border-radius: var(--radius); padding: 24px;
    box-shadow: var(--shadow);
}
.text-input-card textarea {
    width: 100%; padding: 14px;
    border: 1.5px solid var(--border); border-radius: var(--radius-xs);
    font-size: 0.94rem; font-family: inherit; line-height: 1.7;
    resize: vertical; outline: none;
}
.text-input-card textarea:focus { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(99,102,241,0.1); }
.char-counter { text-align: right; font-size: 0.82rem; color: var(--text-muted); margin-bottom: 16px; }

/* =================================================================
   DATA TABLE (generic)
   ================================================================= */
.table-container { overflow-x: auto; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow); }
.data-table { width: 100%; border-collapse: collapse; font-size: 0.88rem; }
.data-table th {
    background: linear-gradient(135deg, #F8FAFC 0%, #F1F5F9 100%);
    padding: 12px 16px; text-align: left; font-weight: 700;
    color: var(--text-secondary); border-bottom: 2px solid var(--border);
    white-space: nowrap; font-size: 0.82rem;
}
.data-table td { padding: 12px 16px; border-bottom: 1px solid var(--border-light); color: var(--text); }
.data-table tbody tr:hover { background: var(--accent-light); }
.action-cell { display: flex; gap: 6px; white-space: nowrap; }

/* =================================================================
   BADGES
   ================================================================= */
.badge { display: inline-block; padding: 3px 10px; border-radius: 20px; font-size: 0.78rem; font-weight: 600; }
.badge-file { background: #DBEAFE; color: #1E40AF; }
.badge-text { background: #F3E8FF; color: #6B21A8; }
.badge-upload { background: #DBEAFE; color: #1E40AF; }
.badge-text_input { background: #F3E8FF; color: #6B21A8; }
.badge-download_report { background: #D1FAE5; color: #065F46; }
.badge-user { background: #DBEAFE; color: #1E40AF; }
.badge-admin { background: #FEF3C7; color: #92400E; }
.status-badge { display: inline-block; padding: 3px 10px; border-radius: 20px; font-size: 0.78rem; font-weight: 600; }
.status-active { background: #D1FAE5; color: #065F46; }
.status-disabled { background: #FEE2E2; color: #991B1B; }
.prob-badge { display: inline-block; padding: 4px 12px; border-radius: 20px; font-size: 0.82rem; font-weight: 700; }
.prob-ai { background: #FEE2E2; color: #DC2626; }
.prob-likely { background: #FFF7ED; color: #EA580C; }
.prob-mixed { background: #FFFBEB; color: #D97706; }
.prob-human { background: #D1FAE5; color: #059669; }

/* =================================================================
   PAGINATION — Enhanced
   ================================================================= */
.pagination { display: flex; align-items: center; justify-content: center; gap: 16px; padding: 28px 0; }
.page-btn {
    padding: 10px 22px;
    border: 2px solid var(--border);
    border-radius: var(--radius-xs);
    font-size: 0.88rem;
    text-decoration: none;
    color: var(--accent);
    font-weight: 700;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    background: var(--surface);
    box-shadow: var(--shadow-sm), inset 0 1px 0 rgba(255,255,255,0.6);
}
.page-btn:hover {
    background: linear-gradient(135deg, var(--accent) 0%, #60A5FA 100%);
    color: #fff;
    border-color: transparent;
    box-shadow: 0 5px 16px rgba(37, 99, 235, 0.3), 0 2px 6px rgba(37, 99, 235, 0.2);
    transform: translateY(-2px);
}
.page-btn:active { transform: translateY(0) scale(0.98); }
.page-info {
    font-size: 0.88rem;
    color: var(--text-muted);
    font-weight: 500;
}

/* =================================================================
   EMPTY STATE
   ================================================================= */
.empty-state { text-align: center; padding: 60px 20px; }
.empty-icon { display: flex; justify-content: center; margin-bottom: 16px; color: var(--text-muted); }
.empty-state p { color: var(--text-muted); font-size: 1rem; margin-bottom: 20px; }

/* =================================================================
   SETTINGS
   ================================================================= */
.settings-container { max-width: 680px; margin: 0 auto; padding: 32px 20px; }
.settings-card {
    background: var(--surface); border: 1px solid var(--border);
    border-radius: var(--radius); padding: 28px; margin-bottom: 20px;
    box-shadow: var(--shadow);
}
.settings-card h3 { font-size: 1.1rem; margin-bottom: 20px; color: var(--text); }
.settings-form .form-group { margin-bottom: 16px; }
.settings-form label { display: block; font-weight: 600; font-size: 0.88rem; margin-bottom: 6px; color: var(--text-secondary); }
.settings-form input[type="password"],
.settings-form input[type="text"] {
    width: 100%; padding: 10px 14px;
    border: 1.5px solid var(--border); border-radius: var(--radius-xs);
    font-size: 0.94rem; outline: none; transition: all var(--transition);
}
.settings-form input:focus { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(99,102,241,0.1); }
.settings-input-disabled {
    width: 100%; padding: 10px 14px;
    border: 1.5px solid var(--border-light); border-radius: var(--radius-xs);
    font-size: 0.94rem; background: #F8FAFC; color: var(--text-muted);
    cursor: not-allowed;
}
.info-grid { display: grid; grid-template-columns: 1fr; gap: 12px; }
.info-item { display: flex; justify-content: space-between; align-items: center; padding: 12px 0; border-bottom: 1px solid var(--border-light); }
.info-label { font-weight: 600; color: var(--text-secondary); font-size: 0.88rem; }
.info-value { color: var(--text); font-size: 0.88rem; text-align: right; }

/* =================================================================
   PAGE LAYOUT HELPERS
   ================================================================= */
.detect-container { max-width: 780px; margin: 0 auto; padding: 32px 20px; }
.history-container { max-width: 1100px; margin: 0 auto; padding: 32px 20px; }
.main-content { min-height: calc(100vh - 56px - 60px); }

/* =================================================================
   RESPONSIVE
   ================================================================= */
@media (max-width: 768px) {
    .container { padding: 24px 16px; }
    .header { padding: 44px 0 36px; }
    .header h1 { font-size: 1.8rem; }
    .header .tagline { font-size: 0.95rem; }

    .upload-card { padding: 32px 24px; }
    .drop-zone { padding: 48px 20px; }

    .features { grid-template-columns: 1fr; gap: 14px; }

    .score-card { flex-direction: column; text-align: center; padding: 32px 28px; }
    .score-ring { width: 130px; height: 130px; }
    .score-ring-value { font-size: 2rem; }
    .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 10px; }
    .stat-card { padding: 14px 10px; }
    .stat-card-value { font-size: 1.45rem; }

    .chart-grid { grid-template-columns: 1fr; gap: 18px; }

    .report-header { flex-direction: column; align-items: flex-start; }
    .report-header-right { width: 100%; }
    .report-header-right .btn { flex: 1; }

    .legend-row { grid-template-columns: 1fr 1fr; }

    /* Navbar responsive */
    .nav-container {
        padding: 0 12px;
        height: auto;
        min-height: 56px;
        flex-wrap: wrap;
        padding-top: 8px;
        padding-bottom: 8px;
    }
    .nav-links {
        flex-wrap: wrap;
        gap: 2px;
        justify-content: center;
        order: 2;
        width: 100%;
        margin-top: 4px;
    }
    .nav-links a { font-size: 0.8rem; padding: 6px 10px; }
    .nav-logo { order: 1; }
    .nav-user { order: 1; margin-left: auto; }

    .color-picker-grid { grid-template-columns: repeat(3, 1fr); }
    .ann-form-row { grid-template-columns: 1fr; }
    .ann-modal { max-width: 95%; }

    .banner-announcements { margin: 8px 10px 0; border-radius: 14px; }
    .banner-inner { padding: 8px 40px 8px 14px; }
    .banner-item { padding: 6px 10px; font-size: 0.8rem; gap: 6px; }
    .banner-item-close { width: 18px; height: 18px; }
    .banner-item-close svg { width: 12px; height: 12px; }
    .banner-close { right: 8px; top: 8px; width: 24px; height: 24px; }

    .home-stats-row { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
    .container { padding: 16px 12px; }
    .header { padding: 36px 0 28px; }
    .header h1 { font-size: 1.55rem; }
    .header-mark { width: 54px; height: 54px; }

    .upload-card { padding: 24px 16px; }
    .drop-zone { padding: 36px 14px; }

    .score-card { padding: 24px 18px; gap: 24px; }
    .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 8px; }
    .legend-row { grid-template-columns: 1fr; }

    .annotation-section { padding: 20px; font-size: 0.96rem; }
    .detail-section { padding: 20px; }

    .report-header-right { flex-direction: column; }
    .report-header-right .btn { width: 100%; }

    .nav-links a { font-size: 0.75rem; padding: 5px 8px; }
    .nav-user { gap: 4px; }
    .nav-username { font-size: 0.8rem; }
}