/* style.css - деловой корпоративный редизайн */

:root {
    --primary-50: #eff6ff;
    --primary-100: #dbeafe;
    --primary-200: #bfdbfe;
    --primary-300: #93c5fd;
    --primary-400: #60a5fa;
    --primary-500: #3b82f6;
    --primary-600: #2563eb;
    --primary-700: #1d4ed8;
    --primary-800: #1e40af;
    --primary-900: #1e3a8a;
    
    --gray-50: #f8fafc;
    --gray-100: #f1f5f9;
    --gray-200: #e2e8f0;
    --gray-300: #cbd5e1;
    --gray-400: #94a3b8;
    --gray-500: #64748b;
    --gray-600: #475569;
    --gray-700: #334155;
    --gray-800: #1e293b;
    --gray-900: #0f172a;
    
    --success: #22c55e;
    --warning: #f59e0b;
    --danger: #ef4444;
    --info: #3b82f6;
    
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-xl: 20px;
    --radius-full: 9999px;
    
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
    --shadow-lg: 0 8px 30px rgba(0,0,0,0.12);
    --shadow-xl: 0 20px 60px rgba(0,0,0,0.15);
    --shadow-2xl: 0 30px 80px rgba(0,0,0,0.20);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    min-height: 100vh;
    background: var(--gray-900);
    color: var(--gray-100);
    padding: 0;
    transition: background 0.3s ease, color 0.3s ease;
    -webkit-font-smoothing: antialiased;
}

/* ============================================
   СВЕТЛАЯ ТЕМА
   ============================================ */
body[data-theme="light"] {
    background: var(--gray-50);
    color: var(--gray-800);
}

body[data-theme="light"] .topbar,
body[data-theme="light"] .card,
body[data-theme="light"] .history-card,
body[data-theme="light"] .info-card,
body[data-theme="light"] .footer {
    background: #ffffff;
    border-color: var(--gray-200);
    box-shadow: var(--shadow-sm);
}

body[data-theme="light"] .topbar {
    border-bottom: 1px solid var(--gray-200);
}

body[data-theme="light"] .brand-block h1 {
    color: var(--gray-900);
}

body[data-theme="light"] .brand-block p {
    color: var(--gray-500);
}

body[data-theme="light"] .topnav a {
    color: var(--gray-600);
}

body[data-theme="light"] .topnav a:hover,
body[data-theme="light"] .topnav a.active {
    color: var(--primary-600);
    background: var(--primary-50);
}

body[data-theme="light"] .section-heading h3,
body[data-theme="light"] .history-header h2 {
    color: var(--gray-800);
}

body[data-theme="light"] .subtitle {
    color: var(--gray-500);
}

body[data-theme="light"] .file-label {
    background: var(--gray-50);
    border-color: var(--gray-300);
    color: var(--gray-700);
}

body[data-theme="light"] .file-label:hover {
    border-color: var(--primary-400);
    background: var(--primary-50);
}

body[data-theme="light"] .file-info {
    color: var(--gray-500);
}

body[data-theme="light"] .result-area {
    background: var(--gray-50);
    border-color: var(--gray-200);
}

body[data-theme="light"] .result-label {
    color: var(--gray-500);
}

body[data-theme="light"] .status-pill {
    background: var(--primary-100);
    color: var(--primary-700);
}

body[data-theme="light"] .history-item {
    background: var(--gray-50);
    border-color: var(--gray-200);
}

body[data-theme="light"] .history-item:hover {
    background: var(--gray-100);
}

body[data-theme="light"] .history-item-header {
    color: var(--gray-600);
}

body[data-theme="light"] .history-files {
    color: var(--gray-700);
}

body[data-theme="light"] .history-message {
    color: var(--gray-500);
}

body[data-theme="light"] .history-result-badge {
    background: var(--primary-50);
    color: var(--primary-700);
}

body[data-theme="light"] .empty-history {
    color: var(--gray-400);
}

body[data-theme="light"] .info-card h3 {
    color: var(--gray-800);
}

body[data-theme="light"] .info-card p {
    color: var(--gray-500);
}

body[data-theme="light"] .info-card a {
    color: var(--primary-600);
}

body[data-theme="light"] .footer {
    background: #ffffff;
    border-top-color: var(--gray-200);
}

body[data-theme="light"] .footer-logo {
    color: var(--gray-900);
}

body[data-theme="light"] .footer-tagline {
    color: var(--gray-500);
}

body[data-theme="light"] .footer-column h4 {
    color: var(--gray-600);
}

body[data-theme="light"] .footer-column a {
    color: var(--gray-500);
}

body[data-theme="light"] .footer-column a:hover {
    color: var(--primary-600);
}

body[data-theme="light"] .footer-bottom {
    color: var(--gray-400);
}

body[data-theme="light"] .footer-legal a {
    color: var(--gray-400);
}

body[data-theme="light"] .footer-legal a:hover {
    color: var(--gray-600);
}

body[data-theme="light"] .user-profile {
    background: var(--gray-50);
    border-color: var(--gray-200);
}

body[data-theme="light"] .user-name {
    color: var(--gray-800);
}

body[data-theme="light"] .user-email {
    color: var(--gray-500);
}

body[data-theme="light"] .logout-btn {
    color: var(--gray-400);
}

body[data-theme="light"] .logout-btn:hover {
    background: rgba(239, 68, 68, 0.08);
    color: var(--danger);
}

body[data-theme="light"] .theme-toggle {
    background: var(--gray-100);
    color: var(--gray-600);
}

body[data-theme="light"] .theme-toggle:hover {
    background: var(--gray-200);
}

/* ============================================
   TOPBAR
   ============================================ */
.topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 32px;
    background: rgba(15, 23, 42, 0.95);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(148, 163, 184, 0.08);
    position: sticky;
    top: 0;
    z-index: 100;
    min-height: 68px;
}

.brand-block {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-shrink: 0;
}

.brand-icon {
    width: 38px;
    height: 38px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-md);
    background: linear-gradient(135deg, var(--primary-500), var(--primary-700));
    color: #fff;
    font-weight: 900;
    font-size: 18px;
    flex-shrink: 0;
}

.brand-block h1 {
    font-size: 20px;
    font-weight: 800;
    color: #ffffff;
    letter-spacing: -0.5px;
}

.brand-block p {
    font-size: 12px;
    color: var(--gray-400);
    font-weight: 500;
}

.topnav {
    display: flex;
    align-items: center;
    gap: 4px;
    flex: 1;
    justify-content: center;
}

.topnav a {
    color: var(--gray-300);
    text-decoration: none;
    padding: 8px 16px;
    border-radius: var(--radius-full);
    font-size: 14px;
    font-weight: 500;
    transition: all 0.2s ease;
    white-space: nowrap;
}

.topnav a:hover {
    color: #ffffff;
    background: rgba(255, 255, 255, 0.06);
}

.topnav a.active {
    color: #ffffff;
    background: rgba(59, 130, 246, 0.15);
}

.topnav-actions {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-shrink: 0;
}

.theme-toggle {
    border: none;
    background: rgba(255, 255, 255, 0.06);
    color: var(--gray-300);
    border-radius: var(--radius-full);
    padding: 8px 12px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    gap: 6px;
}

.theme-toggle:hover {
    background: rgba(255, 255, 255, 0.12);
    color: #ffffff;
}

/* ============================================
   USER PROFILE
   ============================================ */
.user-profile {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 4px 12px 4px 4px;
    background: rgba(255, 255, 255, 0.06);
    border-radius: var(--radius-full);
    border: 1px solid rgba(148, 163, 184, 0.08);
    transition: all 0.25s ease;
    flex-shrink: 0;
}

.user-profile:hover {
    background: rgba(255, 255, 255, 0.10);
    border-color: rgba(148, 163, 184, 0.15);
}

.user-avatar {
    width: 34px;
    height: 34px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 14px;
    color: #ffffff;
    flex-shrink: 0;
    background: linear-gradient(135deg, var(--primary-500), var(--primary-700));
}

.user-info {
    display: flex;
    flex-direction: column;
    line-height: 1.2;
}

.user-name {
    font-size: 13px;
    font-weight: 600;
    color: #ffffff;
    white-space: nowrap;
}

.user-email {
    font-size: 11px;
    color: var(--gray-400);
    white-space: nowrap;
}

.logout-btn {
    background: none;
    border: none;
    color: var(--gray-400);
    padding: 4px 8px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 13px;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    gap: 4px;
}

.logout-btn:hover {
    background: rgba(239, 68, 68, 0.12);
    color: var(--danger);
}

/* ============================================
   MAIN CONTAINER
   ============================================ */
.page-shell {
    max-width: 1280px;
    margin: 0 auto;
    padding: 24px 32px 0;
}

.main-container {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: 24px;
    align-items: start;
}

/* ============================================
   CARDS
   ============================================ */
.card,
.history-card,
.info-card {
    background: rgba(15, 23, 42, 0.85);
    border: 1px solid rgba(148, 163, 184, 0.08);
    border-radius: var(--radius-lg);
    padding: 24px;
    backdrop-filter: blur(12px);
    transition: border-color 0.2s ease;
}

.card:hover,
.history-card:hover {
    border-color: rgba(148, 163, 184, 0.15);
}

.section-heading {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 12px;
    margin-bottom: 4px;
}

.section-label {
    display: inline-block;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    font-size: 11px;
    font-weight: 700;
    color: var(--primary-400);
    margin-bottom: 2px;
}

.section-heading h3 {
    font-size: 20px;
    font-weight: 700;
    color: #ffffff;
}

.status-pill {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px 14px;
    border-radius: var(--radius-full);
    background: rgba(34, 197, 94, 0.12);
    color: var(--success);
    font-size: 12px;
    font-weight: 600;
    white-space: nowrap;
}

.status-pill::before {
    content: '';
    display: inline-block;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--success);
    animation: pulse-dot 2s ease-in-out infinite;
}

@keyframes pulse-dot {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.3; }
}

.subtitle {
    margin: 8px 0 20px;
    color: var(--gray-400);
    font-size: 14px;
    line-height: 1.6;
}

/* ============================================
   FILE INPUT
   ============================================ */
.file-input-group {
    margin-bottom: 12px;
}

.file-label {
    display: flex;
    align-items: center;
    gap: 12px;
    background: rgba(15, 23, 42, 0.6);
    border: 1.5px dashed rgba(148, 163, 184, 0.2);
    border-radius: var(--radius-md);
    padding: 14px 18px;
    cursor: pointer;
    color: var(--gray-200);
    font-weight: 500;
    transition: all 0.2s ease;
    font-size: 14px;
}

.file-label:hover {
    border-color: var(--primary-400);
    background: rgba(59, 130, 246, 0.05);
}

.file-label .icon {
    font-size: 18px;
    opacity: 0.7;
}

.file-label.file-selected {
    border-color: var(--success);
    background: rgba(34, 197, 94, 0.06);
}

.file-input {
    display: none;
}

.file-info {
    color: var(--gray-500);
    font-size: 13px;
    margin-top: 6px;
    padding-left: 4px;
    transition: color 0.2s ease;
}

.file-info.has-file {
    color: var(--success);
}

/* ============================================
   SUBMIT BUTTON
   ============================================ */
.submit-btn {
    width: 100%;
    border: none;
    padding: 14px 20px;
    border-radius: var(--radius-md);
    color: #ffffff;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    background: linear-gradient(135deg, var(--primary-500), var(--primary-700));
    transition: all 0.25s ease;
    margin: 16px 0 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.submit-btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 8px 24px rgba(59, 130, 246, 0.25);
}

.submit-btn:active {
    transform: translateY(0);
}

.submit-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

.submit-btn.loading {
    animation: pulse-btn 1.5s ease-in-out infinite;
}

@keyframes pulse-btn {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.6; }
}

/* ============================================
   RESULT AREA
   ============================================ */
.result-area {
    display: flex;
    flex-direction: column;
    gap: 8px;
    background: rgba(15, 23, 42, 0.6);
    border: 1px solid rgba(148, 163, 184, 0.08);
    border-radius: var(--radius-md);
    padding: 16px 20px;
    min-height: 80px;
    transition: all 0.3s ease;
}

.result-label {
    font-weight: 600;
    color: var(--gray-400);
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.06em;
}

.result-number {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 50px;
    font-size: 16px;
    color: var(--gray-200);
}

.result-number .score-container {
    animation: fadeInUp 0.4s ease-out;
    width: 100%;
}

/* ============================================
   HISTORY
   ============================================ */
.history-wrapper {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.history-card {
    padding: 20px;
    display: flex;
    flex-direction: column;
    max-height: 600px;
}

.history-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
    gap: 12px;
}

.history-header h2 {
    font-size: 18px;
    font-weight: 700;
    color: #ffffff;
}

.clear-btn {
    border: none;
    background: rgba(239, 68, 68, 0.08);
    color: var(--gray-400);
    font-weight: 600;
    border-radius: var(--radius-full);
    padding: 6px 14px;
    cursor: pointer;
    font-size: 13px;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    gap: 6px;
}

.clear-btn:hover {
    background: rgba(239, 68, 68, 0.15);
    color: var(--danger);
}

.history-list {
    flex: 1;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 8px;
    padding-right: 4px;
}

.history-list::-webkit-scrollbar {
    width: 4px;
}

.history-list::-webkit-scrollbar-track {
    background: transparent;
}

.history-list::-webkit-scrollbar-thumb {
    background: rgba(148, 163, 184, 0.2);
    border-radius: var(--radius-full);
}

.empty-history {
    text-align: center;
    padding: 32px 16px;
    color: var(--gray-500);
    font-size: 14px;
}

.history-item {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(148, 163, 184, 0.06);
    border-radius: var(--radius-md);
    padding: 14px 16px;
    transition: all 0.2s ease;
    animation: fadeInUp 0.3s ease-out;
}

.history-item:hover {
    background: rgba(255, 255, 255, 0.06);
    border-color: rgba(148, 163, 184, 0.12);
}

.history-item-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 8px;
    margin-bottom: 4px;
    font-size: 12px;
    color: var(--gray-500);
}

.history-item-id {
    font-weight: 600;
    color: var(--gray-400);
}

.history-time {
    font-size: 11px;
    color: var(--gray-500);
}

.history-files {
    font-size: 14px;
    font-weight: 500;
    color: #ffffff;
    margin-bottom: 4px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.history-files .separator {
    color: var(--gray-600);
}

.history-message {
    font-size: 13px;
    color: var(--gray-400);
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}

.history-status {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 2px 10px;
    border-radius: var(--radius-full);
    font-size: 11px;
    font-weight: 600;
}

.history-status.done {
    background: rgba(34, 197, 94, 0.12);
    color: var(--success);
}

.history-status.processing {
    background: rgba(59, 130, 246, 0.12);
    color: var(--info);
    animation: pulse-dot 1.5s ease-in-out infinite;
}

.history-status.pending {
    background: rgba(245, 158, 11, 0.12);
    color: var(--warning);
}

.history-status.error {
    background: rgba(239, 68, 68, 0.12);
    color: var(--danger);
}

.history-result-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    margin-top: 6px;
    padding: 4px 12px;
    border-radius: var(--radius-full);
    background: rgba(59, 130, 246, 0.08);
    color: var(--primary-400);
    font-size: 12px;
    font-weight: 600;
}

.history-actions {
    display: flex;
    gap: 6px;
    margin-top: 8px;
}

.history-btn {
    background: none;
    border: none;
    padding: 4px 8px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    color: var(--gray-500);
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.history-btn:hover {
    background: rgba(255, 255, 255, 0.06);
    color: var(--gray-300);
}

.history-btn.delete-btn:hover {
    background: rgba(239, 68, 68, 0.12);
    color: var(--danger);
}

.history-btn.preview-btn:hover {
    background: rgba(59, 130, 246, 0.12);
    color: var(--primary-400);
}

/* ============================================
   INFO CARDS GRID
   ============================================ */
.cards-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    margin-top: 24px;
}

.info-card {
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.info-card h3 {
    font-size: 16px;
    font-weight: 700;
    color: #ffffff;
}

.info-card p {
    font-size: 14px;
    color: var(--gray-400);
    line-height: 1.5;
    flex: 1;
}

.info-card a {
    color: var(--primary-400);
    text-decoration: none;
    font-weight: 600;
    font-size: 14px;
    transition: color 0.2s ease;
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

.info-card a:hover {
    color: var(--primary-300);
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
    margin-top: 48px;
    padding: 40px 0 24px;
    border-top: 1px solid rgba(148, 163, 184, 0.06);
    background: rgba(15, 23, 42, 0.6);
}

.footer-content {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 32px;
    display: grid;
    grid-template-columns: 1fr 2fr 1fr;
    gap: 40px;
}

.footer-logo {
    font-size: 20px;
    font-weight: 800;
    color: #ffffff;
    display: block;
    margin-bottom: 8px;
    letter-spacing: -0.5px;
}

.footer-tagline {
    font-size: 14px;
    color: var(--gray-400);
    line-height: 1.6;
    max-width: 280px;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.footer-column h4 {
    font-size: 12px;
    font-weight: 700;
    color: var(--gray-400);
    margin-bottom: 12px;
    text-transform: uppercase;
    letter-spacing: 0.06em;
}

.footer-column a {
    display: block;
    font-size: 14px;
    color: var(--gray-500);
    text-decoration: none;
    padding: 4px 0;
    transition: all 0.2s ease;
}

.footer-column a:hover {
    color: #ffffff;
}

.footer-social {
    display: flex;
    gap: 8px;
    justify-content: flex-end;
    align-items: flex-start;
}

.footer-social a {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.04);
    border-radius: 50%;
    font-size: 18px;
    text-decoration: none;
    transition: all 0.25s ease;
    color: var(--gray-400);
    border: 1px solid rgba(148, 163, 184, 0.06);
}

.footer-social a:hover {
    background: rgba(59, 130, 246, 0.12);
    color: #ffffff;
    transform: translateY(-2px);
    border-color: rgba(59, 130, 246, 0.2);
}

.footer-bottom {
    max-width: 1280px;
    margin: 24px auto 0;
    padding: 16px 32px 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 13px;
    color: var(--gray-500);
    border-top: 1px solid rgba(148, 163, 184, 0.06);
}

.footer-legal {
    display: flex;
    gap: 24px;
}

.footer-legal a {
    color: var(--gray-500);
    text-decoration: none;
    transition: color 0.2s ease;
    font-size: 13px;
}

.footer-legal a:hover {
    color: var(--gray-300);
}

/* ============================================
   ANIMATIONS
   ============================================ */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(12px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ============================================
   MODAL / PREVIEW
   ============================================ */
.preview-modal-overlay {
    position: fixed !important;
    inset: 0 !important;
    background: rgba(0, 0, 0, 0.8) !important;
    backdrop-filter: blur(8px) !important;
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
    z-index: 999999 !important;
    padding: 40px !important;
    animation: modalFadeIn 0.25s ease !important;
}

@keyframes modalFadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.preview-modal {
    background: var(--gray-900) !important;
    border-radius: var(--radius-xl) !important;
    max-width: 1000px !important;
    width: 100% !important;
    max-height: 90vh !important;
    display: flex !important;
    flex-direction: column !important;
    border: 1px solid rgba(148, 163, 184, 0.1) !important;
    box-shadow: var(--shadow-2xl) !important;
    animation: modalSlideUp 0.3s ease !important;
    overflow: hidden !important;
}

@keyframes modalSlideUp {
    from { opacity: 0; transform: translateY(20px) scale(0.98); }
    to { opacity: 1; transform: translateY(0) scale(1); }
}

.preview-modal-header {
    display: flex !important;
    justify-content: space-between !important;
    align-items: center !important;
    padding: 20px 28px !important;
    border-bottom: 1px solid rgba(148, 163, 184, 0.08) !important;
    flex-shrink: 0 !important;
}

.preview-modal-title {
    display: flex !important;
    align-items: center !important;
    gap: 12px !important;
}

.preview-modal-title .title {
    font-size: 18px !important;
    font-weight: 700 !important;
    color: #ffffff !important;
}

.preview-modal-title .badge {
    font-size: 12px !important;
    color: var(--gray-400) !important;
    background: rgba(148, 163, 184, 0.08) !important;
    padding: 4px 14px !important;
    border-radius: var(--radius-full) !important;
    font-weight: 500 !important;
}

.preview-modal-close {
    background: none !important;
    border: none !important;
    color: var(--gray-400) !important;
    font-size: 24px !important;
    cursor: pointer !important;
    padding: 4px 12px !important;
    border-radius: var(--radius-sm) !important;
    transition: all 0.2s ease !important;
}

.preview-modal-close:hover {
    background: rgba(239, 68, 68, 0.12) !important;
    color: var(--danger) !important;
}

.preview-modal-body {
    padding: 24px 28px !important;
    overflow-y: auto !important;
    flex: 1 !important;
}

.preview-modal-body::-webkit-scrollbar {
    width: 4px !important;
}

.preview-modal-body::-webkit-scrollbar-track {
    background: transparent !important;
}

.preview-modal-body::-webkit-scrollbar-thumb {
    background: rgba(148, 163, 184, 0.2) !important;
    border-radius: var(--radius-full) !important;
}

.preview-metrics {
    display: grid !important;
    grid-template-columns: repeat(5, 1fr) !important;
    gap: 12px !important;
    margin-bottom: 28px !important;
}

.preview-metric {
    background: rgba(15, 23, 42, 0.6) !important;
    border-radius: var(--radius-md) !important;
    padding: 16px 20px !important;
    text-align: center !important;
    border: 1px solid rgba(148, 163, 184, 0.06) !important;
}

.preview-metric .value {
    font-size: 28px !important;
    font-weight: 800 !important;
    letter-spacing: -0.5px !important;
    color: #ffffff !important;
}

.preview-metric .label {
    font-size: 11px !important;
    color: var(--gray-400) !important;
    text-transform: uppercase !important;
    letter-spacing: 0.04em !important;
    margin-top: 4px !important;
}

.preview-section {
    margin-top: 20px !important;
}

.preview-section-header {
    display: flex !important;
    align-items: center !important;
    gap: 12px !important;
    margin-bottom: 12px !important;
}

.preview-section-header .title {
    font-size: 16px !important;
    font-weight: 700 !important;
    color: #ffffff !important;
}

.preview-section-header .count {
    font-size: 12px !important;
    color: var(--gray-400) !important;
    background: rgba(148, 163, 184, 0.08) !important;
    padding: 2px 12px !important;
    border-radius: var(--radius-full) !important;
}

.preview-section-body {
    display: flex !important;
    flex-direction: column !important;
    gap: 10px !important;
    max-height: 350px !important;
    overflow-y: auto !important;
    padding-right: 4px !important;
}

.preview-section-body::-webkit-scrollbar {
    width: 4px !important;
}

.preview-section-body::-webkit-scrollbar-track {
    background: transparent !important;
}

.preview-section-body::-webkit-scrollbar-thumb {
    background: rgba(148, 163, 184, 0.15) !important;
    border-radius: var(--radius-full) !important;
}

.preview-fragment {
    background: rgba(15, 23, 42, 0.5) !important;
    border-radius: var(--radius-md) !important;
    padding: 16px 18px !important;
    border-left: 3px solid !important;
    border-left-color: var(--gray-600) !important;
}

.preview-fragment.identical {
    border-left-color: var(--success) !important;
}

.preview-fragment.changes {
    border-left-color: var(--warning) !important;
}

.preview-fragment.missing {
    border-left-color: var(--danger) !important;
}

.preview-fragment-header {
    display: flex !important;
    justify-content: space-between !important;
    align-items: center !important;
    gap: 12px !important;
    margin-bottom: 6px !important;
}

.preview-fragment-number {
    font-size: 13px !important;
    color: var(--gray-400) !important;
    font-weight: 600 !important;
}

.preview-fragment-similarity {
    font-size: 12px !important;
    color: var(--gray-400) !important;
    background: rgba(148, 163, 184, 0.08) !important;
    padding: 2px 12px !important;
    border-radius: var(--radius-full) !important;
    font-weight: 600 !important;
}

.preview-fragment-text {
    font-size: 14px !important;
    line-height: 1.6 !important;
    color: var(--gray-200) !important;
    margin-top: 4px !important;
}

.preview-fragment-text.doc2 {
    color: var(--gray-400) !important;
    margin-top: 4px !important;
    padding-top: 4px !important;
    border-top: 1px solid rgba(148, 163, 184, 0.06) !important;
}

.preview-fragment-comment {
    font-size: 13px !important;
    color: var(--gray-400) !important;
    margin-top: 6px !important;
    padding: 6px 12px !important;
    background: rgba(148, 163, 184, 0.04) !important;
    border-radius: var(--radius-sm) !important;
}

.preview-fragment-risks {
    font-size: 13px !important;
    color: var(--danger) !important;
    margin-top: 6px !important;
    display: flex !important;
    align-items: center !important;
    gap: 6px !important;
    padding: 4px 12px !important;
    background: rgba(239, 68, 68, 0.06) !important;
    border-radius: var(--radius-sm) !important;
}

.preview-loading {
    text-align: center !important;
    padding: 60px 20px !important;
    color: var(--gray-400) !important;
}

.preview-loading .spinner {
    font-size: 40px !important;
    margin-bottom: 16px !important;
    display: inline-block !important;
    animation: spin 1s linear infinite !important;
}

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

.preview-loading .text {
    font-size: 18px !important;
    font-weight: 600 !important;
    color: #ffffff !important;
}

.preview-loading .subtext {
    font-size: 14px !important;
    margin-top: 8px !important;
    color: var(--gray-500) !important;
}

.preview-error {
    text-align: center !important;
    padding: 60px 20px !important;
    color: var(--danger) !important;
}

.preview-error .icon {
    font-size: 40px !important;
    margin-bottom: 16px !important;
}

.preview-error .title {
    font-size: 18px !important;
    font-weight: 600 !important;
    color: #ffffff !important;
}

.preview-error .message {
    font-size: 14px !important;
    margin-top: 8px !important;
    color: var(--gray-400) !important;
}

.preview-error .retry-btn {
    margin-top: 16px !important;
    padding: 10px 28px !important;
    border-radius: var(--radius-md) !important;
    background: var(--primary-500) !important;
    color: #ffffff !important;
    border: none !important;
    cursor: pointer !important;
    font-size: 14px !important;
    font-weight: 600 !important;
    transition: all 0.2s ease !important;
}

.preview-error .retry-btn:hover {
    background: var(--primary-600) !important;
    transform: scale(1.02) !important;
}

.btn-preview {
    display: inline-flex !important;
    align-items: center !important;
    gap: 6px !important;
    padding: 6px 16px !important;
    border-radius: var(--radius-full) !important;
    background: rgba(59, 130, 246, 0.12) !important;
    color: var(--primary-400) !important;
    font-size: 13px !important;
    font-weight: 600 !important;
    border: 1px solid rgba(59, 130, 246, 0.1) !important;
    cursor: pointer !important;
    transition: all 0.2s ease !important;
}

.btn-preview:hover {
    background: rgba(59, 130, 246, 0.2) !important;
    transform: scale(1.02) !important;
}

/* ============================================
   NOTIFICATIONS
   ============================================ */
#notification-container {
    position: fixed !important;
    top: 80px !important;
    right: 24px !important;
    z-index: 999999 !important;
    display: flex !important;
    flex-direction: column !important;
    gap: 8px !important;
    max-width: 400px !important;
    width: 100% !important;
}

.notification {
    padding: 14px 20px !important;
    border-radius: var(--radius-md) !important;
    color: #ffffff !important;
    font-size: 14px !important;
    font-weight: 500 !important;
    box-shadow: var(--shadow-lg) !important;
    animation: slideInRight 0.3s ease-out !important;
}

.notification.success {
    background: var(--success) !important;
}

.notification.error {
    background: var(--danger) !important;
}

.notification.info {
    background: var(--info) !important;
}

@keyframes slideInRight {
    from { transform: translateX(100%); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 1200px) {
    .topbar {
        padding: 10px 20px;
    }
    
    .topnav a {
        font-size: 13px;
        padding: 6px 12px;
    }
    
    .page-shell {
        padding: 16px 20px 0;
    }
    
    .cards-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 1024px) {
    .main-container {
        grid-template-columns: 1fr;
    }
    
    .history-wrapper {
        order: 2;
    }
    
    .form-wrapper {
        order: 1;
    }
    
    .preview-metrics {
        grid-template-columns: repeat(3, 1fr) !important;
    }
}

@media (max-width: 768px) {
    .topbar {
        flex-wrap: wrap;
        padding: 8px 16px;
        gap: 8px;
    }
    
    .brand-block h1 {
        font-size: 16px;
    }
    
    .brand-block p {
        display: none;
    }
    
    .topnav {
        order: 3;
        flex: 1 1 100%;
        justify-content: flex-start;
        overflow-x: auto;
        gap: 2px;
        padding: 4px 0;
    }
    
    .topnav a {
        font-size: 12px;
        padding: 4px 10px;
        white-space: nowrap;
    }
    
    .topnav-actions {
        margin-left: auto;
    }
    
    .cards-grid {
        grid-template-columns: 1fr;
        gap: 12px;
    }
    
    .preview-metrics {
        grid-template-columns: repeat(2, 1fr) !important;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 24px;
        padding: 0 16px;
    }
    
    .footer-links {
        grid-template-columns: 1fr 1fr;
        gap: 16px;
    }
    
    .footer-social {
        justify-content: flex-start;
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: 8px;
        text-align: center;
        padding: 16px 16px 0;
    }
    
    .footer-legal {
        flex-direction: column;
        gap: 4px;
        align-items: center;
    }
    
    .user-email {
        display: none;
    }
    
    .user-name {
        font-size: 12px;
        max-width: 80px;
        overflow: hidden;
        text-overflow: ellipsis;
    }
    
    .user-profile {
        padding: 2px 8px 2px 2px;
    }
    
    .user-avatar {
        width: 28px;
        height: 28px;
        font-size: 11px;
    }
    
    .preview-modal-overlay {
        padding: 16px !important;
    }
    
    .preview-modal-header {
        padding: 16px 20px !important;
    }
    
    .preview-modal-body {
        padding: 16px 20px !important;
    }
    
    .preview-metric .value {
        font-size: 20px !important;
    }
}

@media (max-width: 480px) {
    .topbar {
        padding: 6px 12px;
    }
    
    .brand-icon {
        width: 30px;
        height: 30px;
        font-size: 14px;
    }
    
    .brand-block h1 {
        font-size: 14px;
    }
    
    .topnav a {
        font-size: 11px;
        padding: 3px 8px;
    }
    
    .page-shell {
        padding: 12px 12px 0;
    }
    
    .card,
    .history-card {
        padding: 16px;
    }
    
    .section-heading h3 {
        font-size: 17px;
    }
    
    .preview-metrics {
        grid-template-columns: 1fr 1fr !important;
        gap: 8px !important;
    }
    
    .preview-metric {
        padding: 12px 16px !important;
    }
    
    .preview-metric .value {
        font-size: 18px !important;
    }
}

/* ============================================
   SVG ICON STYLES
   ============================================ */
.icon-svg {
    width: 18px;
    height: 18px;
    flex-shrink: 0;
}

.icon-svg.small {
    width: 14px;
    height: 14px;
}

.icon-svg.large {
    width: 24px;
    height: 24px;
}

/* Toast notification override */
.toast-container {
    position: fixed;
    top: 80px;
    right: 24px;
    z-index: 999999;
    display: flex;
    flex-direction: column;
    gap: 8px;
    max-width: 400px;
    width: 100%;
}

.toast {
    padding: 14px 20px;
    border-radius: var(--radius-md);
    color: #ffffff;
    font-size: 14px;
    font-weight: 500;
    box-shadow: var(--shadow-lg);
    animation: slideInRight 0.3s ease-out;
}

.toast.success {
    background: var(--success);
}

.toast.error {
    background: var(--danger);
}

.toast.info {
    background: var(--info);
}