/* ============================================
   OCR Annotation Platform - Main Styles
   ============================================ */

:root {
    --color-bg: #0a0a0f;
    --color-bg-elevated: #12121a;
    --color-bg-card: #1a1a24;
    --color-border: #2a2a3a;
    --color-text: #e4e4e7;
    --color-text-muted: #71717a;
    --color-primary: #6366f1;
    --color-primary-hover: #818cf8;
    --color-success: #22c55e;
    --color-warning: #f59e0b;
    --color-danger: #ef4444;
    --color-accent: #06b6d4;
    
    --font-sans: 'Space Grotesk', system-ui, sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
    
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.3);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.4);
    --shadow-lg: 0 8px 30px rgba(0,0,0,0.5);
    
    --transition: 0.2s ease;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; }
body { font-family: var(--font-sans); background: var(--color-bg); color: var(--color-text); line-height: 1.6; min-height: 100vh; display: flex; flex-direction: column; }
a { color: var(--color-primary); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--color-primary-hover); }
img { max-width: 100%; height: auto; }

/* Navigation */
.navbar { background: var(--color-bg-elevated); border-bottom: 1px solid var(--color-border); padding: 0.75rem 1rem; position: sticky; top: 0; z-index: 100; }
.nav-container { max-width: 1400px; margin: 0 auto; display: flex; align-items: center; justify-content: space-between; gap: 1rem; }
.nav-logo { display: flex; align-items: center; gap: 0.5rem; font-weight: 700; font-size: 1.25rem; color: var(--color-text); }
.logo-icon { font-size: 1.5rem; color: var(--color-primary); }
.logo-accent { color: var(--color-accent); }
.nav-links { display: flex; align-items: center; gap: 0.25rem; list-style: none; }
.nav-links a { padding: 0.5rem 1rem; border-radius: var(--radius-md); color: var(--color-text-muted); font-weight: 500; transition: all var(--transition); }
.nav-links a:hover, .nav-links a.active { color: var(--color-text); background: var(--color-bg-card); }
.nav-user { display: flex; align-items: center; gap: 0.75rem; margin-left: 1rem; padding-left: 1rem; border-left: 1px solid var(--color-border); }
.user-badge { font-size: 0.875rem; color: var(--color-text-muted); }
.logout-btn { font-size: 0.875rem; color: var(--color-danger) !important; }

.mobile-menu-btn { display: none; flex-direction: column; gap: 5px; padding: 0.5rem; background: none; border: none; cursor: pointer; }
.mobile-menu-btn span { display: block; width: 24px; height: 2px; background: var(--color-text); }

@media (max-width: 768px) {
    .mobile-menu-btn { display: flex; }
    .nav-links { position: absolute; top: 100%; left: 0; right: 0; flex-direction: column; background: var(--color-bg-elevated); border-bottom: 1px solid var(--color-border); padding: 1rem; display: none; }
    .nav-links.active { display: flex; }
    .nav-links a { width: 100%; padding: 0.75rem 1rem; }
    .nav-user { margin: 1rem 0 0; padding: 1rem 0 0; border-left: none; border-top: 1px solid var(--color-border); width: 100%; justify-content: space-between; }
}

/* Main Content */
.main-content { flex: 1; padding: 2rem 1rem; max-width: 1400px; margin: 0 auto; width: 100%; }
.page-header { margin-bottom: 2rem; }
.page-header h1 { font-size: 2rem; font-weight: 700; margin-bottom: 0.5rem; }
.page-header p { color: var(--color-text-muted); }

/* Buttons */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 0.5rem; padding: 0.625rem 1.25rem; font-family: var(--font-sans); font-size: 0.9375rem; font-weight: 600; border-radius: var(--radius-md); border: none; cursor: pointer; transition: all var(--transition); text-decoration: none; }
.btn-primary { background: var(--color-primary); color: white; }
.btn-primary:hover { background: var(--color-primary-hover); color: white; }
.btn-outline { background: transparent; border: 1px solid var(--color-border); color: var(--color-text); }
.btn-outline:hover { background: var(--color-bg-card); border-color: var(--color-text-muted); color: var(--color-text); }
.btn-success { background: var(--color-success); color: white; }
.btn-danger { background: var(--color-danger); color: white; }
.btn-lg { padding: 0.875rem 1.75rem; font-size: 1rem; }
.btn-sm { padding: 0.375rem 0.75rem; font-size: 0.8125rem; }
.btn-block { width: 100%; }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }

/* Forms */
.form-group { margin-bottom: 1.25rem; }
.form-group label { display: block; margin-bottom: 0.5rem; font-weight: 500; }
.form-group input, .form-group select, .form-group textarea { width: 100%; padding: 0.75rem 1rem; font-family: var(--font-sans); font-size: 1rem; background: var(--color-bg); border: 1px solid var(--color-border); border-radius: var(--radius-md); color: var(--color-text); transition: all var(--transition); }
.form-group input:focus, .form-group select:focus { outline: none; border-color: var(--color-primary); box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2); }
.form-group input::placeholder { color: var(--color-text-muted); }
.form-checkbox label { display: flex; align-items: center; gap: 0.75rem; cursor: pointer; }
.form-checkbox input[type="checkbox"] { width: 1.25rem; height: 1.25rem; accent-color: var(--color-primary); }

/* Cards */
.stat-card { background: var(--color-bg-card); border: 1px solid var(--color-border); border-radius: var(--radius-lg); padding: 1.5rem; display: flex; align-items: center; gap: 1rem; }
.stat-card.highlight { border-color: var(--color-primary); background: linear-gradient(135deg, rgba(99, 102, 241, 0.1), transparent); }
.stat-icon { font-size: 2rem; }
.stat-value { font-size: 2rem; font-weight: 700; font-family: var(--font-mono); }
.stat-label { color: var(--color-text-muted); font-size: 0.875rem; }
.stats-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 1rem; margin-bottom: 2rem; }

/* Screenshot Grid */
.screenshot-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); gap: 1rem; }
.screenshot-grid.large { grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); }
.screenshot-card { background: var(--color-bg-card); border: 1px solid var(--color-border); border-radius: var(--radius-lg); overflow: hidden; transition: all var(--transition); display: block; }
.screenshot-card:hover { border-color: var(--color-primary); transform: translateY(-2px); box-shadow: var(--shadow-md); }
.screenshot-preview { position: relative; aspect-ratio: 9/16; background: var(--color-bg); overflow: hidden; }
.screenshot-preview img { width: 100%; height: 100%; object-fit: cover; }
.screenshot-status { position: absolute; top: 0.5rem; right: 0.5rem; width: 1.75rem; height: 1.75rem; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 0.75rem; }
.screenshot-status.status-pending { background: var(--color-warning); }
.screenshot-status.status-annotated { background: var(--color-success); }
.screenshot-status.status-verified { background: var(--color-primary); }
.screenshot-info { padding: 0.75rem; }
.screenshot-name { display: block; font-size: 0.8125rem; font-weight: 500; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.screenshot-meta { display: flex; justify-content: space-between; margin-top: 0.25rem; font-size: 0.75rem; color: var(--color-text-muted); }

/* Auth Pages */
.auth-container { display: flex; align-items: center; justify-content: center; min-height: calc(100vh - 200px); padding: 2rem 1rem; }
.auth-card { background: var(--color-bg-card); border: 1px solid var(--color-border); border-radius: var(--radius-xl); padding: 2.5rem; width: 100%; max-width: 400px; }
.auth-header { text-align: center; margin-bottom: 2rem; }
.auth-header h1 { font-size: 1.75rem; margin-bottom: 0.5rem; }
.auth-header p { color: var(--color-text-muted); }
.auth-footer { text-align: center; margin-top: 1.5rem; padding-top: 1.5rem; border-top: 1px solid var(--color-border); color: var(--color-text-muted); }

/* Landing Page */
.landing { padding: 2rem 0; }
.landing-hero { display: grid; grid-template-columns: 1fr 1fr; gap: 4rem; align-items: center; margin-bottom: 4rem; }
@media (max-width: 968px) { .landing-hero { grid-template-columns: 1fr; gap: 2rem; text-align: center; } .hero-actions { justify-content: center; } }
.hero-title { font-size: 3.5rem; font-weight: 700; line-height: 1.1; margin-bottom: 1.5rem; }
@media (max-width: 480px) { .hero-title { font-size: 2.5rem; } }
.title-line { display: block; }
.title-line.accent { color: var(--color-primary); }
.hero-subtitle { font-size: 1.125rem; color: var(--color-text-muted); margin-bottom: 2rem; max-width: 500px; }
.hero-actions { display: flex; gap: 1rem; flex-wrap: wrap; }
.btn-arrow { transition: transform var(--transition); }
.btn:hover .btn-arrow { transform: translateX(4px); }

.hero-visual { display: flex; justify-content: center; }
.visual-card { perspective: 1000px; }
.card-mockup { background: var(--color-bg-card); border: 1px solid var(--color-border); border-radius: var(--radius-xl); padding: 1rem; width: 280px; transform: rotateY(-5deg) rotateX(5deg); box-shadow: var(--shadow-lg); }
.mockup-header { display: flex; gap: 0.5rem; margin-bottom: 1rem; }
.mockup-header .dot { width: 12px; height: 12px; border-radius: 50%; }
.dot.red { background: #ef4444; }
.dot.yellow { background: #f59e0b; }
.dot.green { background: #22c55e; }
.mockup-content { display: flex; flex-direction: column; gap: 0.75rem; }
.mockup-box { height: 40px; border-radius: var(--radius-sm); border: 2px dashed var(--color-border); }
.mockup-box.box-1 { border-color: var(--color-primary); }
.mockup-box.box-2 { border-color: var(--color-accent); }
.mockup-box.box-3 { border-color: var(--color-success); }
.mockup-text { font-family: var(--font-mono); font-size: 0.875rem; color: var(--color-text-muted); padding-left: 0.5rem; }

.landing-features { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 1.5rem; }
.feature { background: var(--color-bg-card); border: 1px solid var(--color-border); border-radius: var(--radius-lg); padding: 1.5rem; text-align: center; }
.feature-icon { font-size: 2.5rem; margin-bottom: 1rem; }
.feature h3 { font-size: 1.125rem; margin-bottom: 0.5rem; }
.feature p { color: var(--color-text-muted); font-size: 0.9375rem; }

/* Dashboard */
.dashboard-actions { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 1rem; margin-bottom: 2rem; }
.action-card { display: flex; align-items: center; gap: 1rem; background: var(--color-bg-card); border: 1px solid var(--color-border); border-radius: var(--radius-lg); padding: 1.25rem; transition: all var(--transition); }
.action-card:hover { border-color: var(--color-primary); transform: translateX(4px); }
.action-icon { font-size: 2rem; }
.action-content h3 { font-size: 1rem; margin-bottom: 0.25rem; color: var(--color-text); }
.action-content p { font-size: 0.875rem; color: var(--color-text-muted); }
.action-arrow { margin-left: auto; font-size: 1.25rem; color: var(--color-text-muted); }
.action-card:hover .action-arrow { color: var(--color-primary); transform: translateX(4px); }

.section { margin-top: 2rem; }
.section-title { font-size: 1.25rem; margin-bottom: 1rem; }
.section-footer { margin-top: 1.5rem; text-align: center; }

/* Upload */
.upload-container { max-width: 600px; margin: 0 auto; }
.upload-options { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; margin-bottom: 1.5rem; }
@media (max-width: 480px) { .upload-options { grid-template-columns: 1fr; } }
.upload-dropzone { border: 2px dashed var(--color-border); border-radius: var(--radius-xl); padding: 3rem 2rem; text-align: center; cursor: pointer; transition: all var(--transition); position: relative; }
.upload-dropzone:hover, .upload-dropzone.dragover { border-color: var(--color-primary); background: rgba(99, 102, 241, 0.05); }
.dropzone-content { pointer-events: none; }
.dropzone-active { display: none; pointer-events: none; }
.upload-dropzone.dragover .dropzone-content { display: none; }
.upload-dropzone.dragover .dropzone-active { display: block; }
.dropzone-icon { font-size: 3rem; margin-bottom: 1rem; }
.dropzone-text { margin-bottom: 0.5rem; }
.dropzone-hint { font-size: 0.875rem; color: var(--color-text-muted); }

.file-list { margin: 1.5rem 0; }
.file-item { display: flex; align-items: center; gap: 0.75rem; padding: 0.75rem; background: var(--color-bg-card); border-radius: var(--radius-md); margin-bottom: 0.5rem; }
.file-item .file-name { flex: 1; font-size: 0.875rem; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.file-item .file-size { font-size: 0.75rem; color: var(--color-text-muted); }
.file-item .file-remove { background: none; border: none; color: var(--color-danger); cursor: pointer; font-size: 1.25rem; padding: 0.25rem; }

.upload-progress { margin: 1.5rem 0; }
.progress-bar { height: 8px; background: var(--color-bg); border-radius: 4px; overflow: hidden; }
.progress-fill { height: 100%; background: var(--color-primary); transition: width 0.3s; }
.progress-text { margin-top: 0.5rem; font-size: 0.875rem; color: var(--color-text-muted); text-align: center; }

.upload-results { text-align: center; padding: 2rem; }
.upload-results h3 { color: var(--color-success); margin-bottom: 1rem; }
.results-actions { display: flex; gap: 1rem; justify-content: center; margin-top: 1.5rem; }

/* Filter Bar */
.filter-bar { margin-bottom: 1.5rem; padding: 1rem; background: var(--color-bg-card); border-radius: var(--radius-lg); }
.filter-form { display: flex; gap: 1rem; flex-wrap: wrap; align-items: center; }
.filter-group { display: flex; align-items: center; gap: 0.5rem; }
.filter-group label { font-size: 0.875rem; color: var(--color-text-muted); }
.filter-group select { padding: 0.5rem 1rem; background: var(--color-bg); border: 1px solid var(--color-border); border-radius: var(--radius-md); color: var(--color-text); }

/* Pagination */
.pagination { display: flex; align-items: center; justify-content: center; gap: 1rem; margin-top: 2rem; }
.pagination-info { color: var(--color-text-muted); font-size: 0.875rem; }

/* Empty State */
.empty-state { text-align: center; padding: 4rem 2rem; }
.empty-icon { font-size: 4rem; margin-bottom: 1rem; opacity: 0.5; }
.empty-state h3 { margin-bottom: 0.5rem; }
.empty-state p { color: var(--color-text-muted); margin-bottom: 1.5rem; }

/* Export Page */
.export-stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; margin-bottom: 2rem; }
@media (max-width: 600px) { .export-stats { grid-template-columns: 1fr; } }
.language-stats { display: flex; flex-wrap: wrap; gap: 0.75rem; }
.language-stat { background: var(--color-bg-card); border: 1px solid var(--color-border); border-radius: var(--radius-md); padding: 0.5rem 1rem; display: flex; align-items: center; gap: 0.5rem; }
.language-count { font-family: var(--font-mono); font-weight: 600; color: var(--color-primary); }
.export-form-container { max-width: 500px; margin: 2rem auto; }
.export-progress, .export-result { text-align: center; padding: 2rem; }
.spinner { width: 40px; height: 40px; border: 3px solid var(--color-border); border-top-color: var(--color-primary); border-radius: 50%; animation: spin 1s linear infinite; margin: 0 auto 1rem; }
@keyframes spin { to { transform: rotate(360deg); } }
.result-icon { font-size: 3rem; color: var(--color-success); margin-bottom: 1rem; }
.result-stats { margin: 1rem 0; color: var(--color-text-muted); }
.export-info { max-width: 500px; margin: 2rem auto; padding: 1.5rem; background: var(--color-bg-card); border-radius: var(--radius-lg); }
.export-info h3 { margin-bottom: 1rem; }
.export-info ul { list-style: none; }
.export-info li { padding: 0.5rem 0; border-bottom: 1px solid var(--color-border); }
.export-info li:last-child { border-bottom: none; }
.export-info code { font-family: var(--font-mono); color: var(--color-accent); }

/* Admin */
.table-responsive { overflow-x: auto; }
.data-table { width: 100%; border-collapse: collapse; }
.data-table th, .data-table td { padding: 1rem; text-align: left; border-bottom: 1px solid var(--color-border); }
.data-table th { font-weight: 600; color: var(--color-text-muted); font-size: 0.875rem; text-transform: uppercase; }
.data-table tr:hover { background: var(--color-bg-card); }
.badge { background: var(--color-primary); color: white; font-size: 0.625rem; padding: 0.125rem 0.375rem; border-radius: 4px; margin-left: 0.5rem; text-transform: uppercase; }
.role-badge { padding: 0.25rem 0.75rem; border-radius: var(--radius-sm); font-size: 0.75rem; font-weight: 600; }
.role-badge.admin { background: var(--color-primary); color: white; }
.role-badge.user { background: var(--color-bg); color: var(--color-text-muted); }

/* Flash Messages */
.flash-messages { margin-bottom: 1.5rem; }
.flash { padding: 1rem 1.25rem; border-radius: var(--radius-md); display: flex; justify-content: space-between; align-items: center; margin-bottom: 0.5rem; }
.flash-success { background: rgba(34, 197, 94, 0.1); border: 1px solid var(--color-success); color: var(--color-success); }
.flash-error { background: rgba(239, 68, 68, 0.1); border: 1px solid var(--color-danger); color: var(--color-danger); }
.flash-close { background: none; border: none; color: inherit; cursor: pointer; font-size: 1.25rem; opacity: 0.7; }
.flash-close:hover { opacity: 1; }

/* Footer */
.footer { padding: 1.5rem 1rem; border-top: 1px solid var(--color-border); text-align: center; color: var(--color-text-muted); font-size: 0.875rem; }

/* Utilities */
.hidden { display: none !important; }
.status-badge { padding: 0.25rem 0.75rem; border-radius: var(--radius-sm); font-size: 0.75rem; font-weight: 600; text-transform: capitalize; }
.status-badge.status-pending { background: var(--color-warning); color: #000; }
.status-badge.status-annotated { background: var(--color-success); color: white; }
.status-badge.status-verified { background: var(--color-primary); color: white; }