* { box-sizing: border-box; margin: 0; padding: 0; }
:root {
    --primary: #4361ee;
    --primary-dark: #3a56d4;
    --success: #2ec4b6;
    --danger: #e63946;
    --warning: #f4a261;
    --dark: #1a1a2e;
    --gray: #6c757d;
    --light: #f8f9fa;
    --border: #dee2e6;
    --radius: 8px;
    --shadow: 0 2px 8px rgba(0,0,0,0.08);
}
body { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif; background: #f0f2f5; color: #333; line-height: 1.6; }

.navbar { background: var(--dark); color: #fff; padding: 0 24px; display: flex; align-items: center; height: 56px; position: sticky; top: 0; z-index: 100; box-shadow: 0 2px 4px rgba(0,0,0,0.1); }
.nav-brand a { color: #fff; text-decoration: none; font-weight: 700; font-size: 18px; }
.nav-links { margin-left: auto; display: flex; gap: 4px; }
.nav-links a { color: rgba(255,255,255,0.75); text-decoration: none; padding: 8px 14px; border-radius: var(--radius); font-size: 14px; transition: all 0.2s; }
.nav-links a:hover, .nav-links a.active { background: rgba(255,255,255,0.12); color: #fff; }

.container { max-width: 1200px; margin: 0 auto; padding: 24px; }

.hero { text-align: center; padding: 60px 20px; }
.hero-icon { font-size: 64px; margin-bottom: 16px; }
.hero h1 { font-size: 36px; color: var(--dark); margin-bottom: 8px; }
.hero p { color: var(--gray); font-size: 18px; margin-bottom: 24px; }
.hero-actions { display: flex; gap: 12px; justify-content: center; }

.features { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 20px; margin: 40px 0; }
.feature-card { background: #fff; padding: 24px; border-radius: var(--radius); box-shadow: var(--shadow); text-align: center; }
.feature-icon { font-size: 40px; margin-bottom: 12px; }
.feature-card h3 { margin-bottom: 8px; font-size: 18px; }
.feature-card p { color: var(--gray); font-size: 14px; }

.quick-links { margin: 40px 0; }
.quick-links h2 { margin-bottom: 16px; }
.links-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 12px; }
.link-card { background: #fff; padding: 20px; border-radius: var(--radius); box-shadow: var(--shadow); text-decoration: none; color: var(--primary); font-weight: 600; text-align: center; transition: transform 0.2s; }
.link-card:hover { transform: translateY(-2px); box-shadow: 0 4px 12px rgba(0,0,0,0.12); }

.dashboard-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 24px; flex-wrap: wrap; gap: 12px; }
.dashboard-header h1 { font-size: 28px; }
.header-actions { display: flex; gap: 8px; }

.stats-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 16px; margin-bottom: 32px; }
.stat-card { background: #fff; padding: 24px; border-radius: var(--radius); box-shadow: var(--shadow); text-align: center; }
.stat-value { font-size: 36px; font-weight: 700; color: var(--primary); }
.stat-label { color: var(--gray); font-size: 14px; margin-top: 4px; }

.page-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 24px; flex-wrap: wrap; gap: 12px; }
.page-header h1 { font-size: 24px; }

.card { background: #fff; border-radius: var(--radius); box-shadow: var(--shadow); margin-bottom: 20px; }
.card-body { padding: 24px; }
.card.bg-light { background: var(--light); }
.card h3 { margin-bottom: 16px; }
.card h4 { margin-bottom: 8px; }

.form-group { margin-bottom: 16px; }
.form-group label { display: block; font-weight: 600; margin-bottom: 6px; font-size: 14px; }
.form-control { width: 100%; padding: 10px 12px; border: 1px solid var(--border); border-radius: var(--radius); font-size: 14px; transition: border-color 0.2s; }
.form-control:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(67,113,238,0.15); }
select.form-control { cursor: pointer; }
.form-text { color: var(--gray); font-size: 12px; margin-top: 4px; display: block; }

.row { display: flex; gap: 20px; flex-wrap: wrap; }
.col { flex: 1; min-width: 200px; }

.input-group { display: flex; gap: 8px; margin-bottom: 8px; }
.input-group .form-control { flex: 1; }
.input-group-lg { display: flex; gap: 8px; max-width: 500px; margin: 0 auto; }
.input-group-lg .form-control { flex: 1; font-size: 16px; padding: 14px; }

.btn { display: inline-block; padding: 8px 18px; border: none; border-radius: var(--radius); font-size: 14px; font-weight: 600; text-decoration: none; cursor: pointer; transition: all 0.2s; }
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); }
.btn-success { background: var(--success); color: #fff; }
.btn-success:hover { opacity: 0.9; }
.btn-danger { background: var(--danger); color: #fff; }
.btn-danger:hover { opacity: 0.9; }
.btn-outline { background: transparent; border: 1px solid var(--border); color: var(--dark); }
.btn-outline:hover { background: var(--light); }
.btn-sm { padding: 5px 12px; font-size: 12px; }
.btn-lg { padding: 12px 28px; font-size: 16px; }

.alert { padding: 14px 18px; border-radius: var(--radius); margin-bottom: 20px; font-size: 14px; }
.alert-success { background: #d4edda; color: #155724; border: 1px solid #c3e6cb; }
.alert-error { background: #f8d7da; color: #721c24; border: 1px solid #f5c6cb; }

.table-responsive { overflow-x: auto; }
.table { width: 100%; border-collapse: collapse; }
.table th, .table td { padding: 12px 16px; text-align: left; border-bottom: 1px solid var(--border); font-size: 14px; }
.table th { font-weight: 600; color: var(--gray); font-size: 12px; text-transform: uppercase; letter-spacing: 0.5px; }
.table tbody tr:hover { background: var(--light); }
.table-sm th, .table-sm td { padding: 8px 10px; font-size: 12px; }
.actions-cell { display: flex; gap: 6px; flex-wrap: wrap; }

.badge { display: inline-block; padding: 2px 8px; border-radius: 12px; font-size: 11px; font-weight: 600; background: var(--light); color: var(--gray); margin-right: 4px; }
.badge.docx { background: #2b579a; color: #fff; }
.badge.pptx { background: #d04423; color: #fff; }

.template-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(340px, 1fr)); gap: 16px; }
.template-card { background: #fff; border-radius: var(--radius); box-shadow: var(--shadow); padding: 20px; }
.template-icon { font-size: 36px; margin-bottom: 8px; }
.template-info { margin-bottom: 12px; }
.template-info h3 { font-size: 18px; margin-bottom: 6px; }
.template-placeholders { margin-bottom: 12px; }
.template-placeholders small { color: var(--gray); display: block; margin-bottom: 6px; }
.placeholder-tags { display: flex; flex-wrap: wrap; gap: 4px; }
.tag { display: inline-block; padding: 2px 8px; background: #e8edff; color: var(--primary); border-radius: 4px; font-size: 12px; font-family: monospace; }
.template-actions { display: flex; gap: 6px; }

.empty-state { text-align: center; padding: 60px 20px; }
.empty-icon { font-size: 48px; margin-bottom: 12px; }
.empty-state h3 { font-size: 20px; margin-bottom: 8px; }
.empty-state p { color: var(--gray); margin-bottom: 20px; }

.verify-page { max-width: 600px; margin: 40px auto; }
.verify-card { background: #fff; border-radius: var(--radius); box-shadow: var(--shadow); padding: 40px; text-align: center; }
.verify-icon { font-size: 48px; margin-bottom: 12px; }
.verify-card h1 { font-size: 24px; margin-bottom: 8px; }
.verify-card p { color: var(--gray); margin-bottom: 24px; }
.verify-form { margin-bottom: 24px; }

.verification-result { padding: 24px; border-radius: var(--radius); margin-top: 24px; }
.verification-result.valid { background: #d4edda; border: 2px solid #c3e6cb; }
.verification-result.invalid { background: #f8d7da; border: 2px solid #f5c6cb; }
.result-icon { font-size: 48px; margin-bottom: 8px; }
.verification-result h2 { margin-bottom: 8px; }
.verification-result p { margin-bottom: 16px; }

.cert-details { text-align: left; margin: 16px 0; }
.detail-row { display: flex; justify-content: space-between; padding: 8px 0; border-bottom: 1px solid rgba(0,0,0,0.08); }
.detail-label { color: var(--gray); font-size: 13px; }
.detail-value { font-weight: 500; font-size: 14px; }
.cert-qrcode { margin-top: 16px; }

.text-muted { color: var(--gray); font-size: 13px; }
.text-success { color: var(--success); }
.text-danger { color: var(--danger); }
code { background: #e8edff; padding: 2px 6px; border-radius: 4px; font-size: 13px; color: var(--primary); }
ul, ol { padding-left: 20px; margin: 8px 0; }
li { margin-bottom: 4px; }

@media (max-width: 768px) {
    .nav-links { gap: 2px; }
    .nav-links a { padding: 6px 10px; font-size: 12px; }
    .hero h1 { font-size: 28px; }
    .dashboard-header { flex-direction: column; align-items: flex-start; }
    .template-grid { grid-template-columns: 1fr; }
}