:root {
    --primary-dark: #0a192f;
    --primary-blue: #0066cc;
    --accent-blue: #00a8ff;
    --surface: rgba(255, 255, 255, 0.06);
    --surface-hover: rgba(255, 255, 255, 0.1);
    --border: rgba(255, 255, 255, 0.08);
    --text: #ffffff;
    --text-dim: rgba(255, 255, 255, 0.7);
    --text-muted: rgba(255, 255, 255, 0.5);
    --success: #22c55e;
    --danger: #ef4444;
    --warning: #f59e0b;
    --info: #3b82f6;
    --radius: 12px;
    --radius-sm: 8px;
    --shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    --transition: all 0.25s ease;
    --max-width: 1100px;
}

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

html { font-size: 16px; scroll-behavior: smooth; }

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    color: var(--text);
    background: var(--primary-dark);
    min-height: 100vh;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

/* Video background */
.video-bg {
    position: fixed; top: 0; left: 0; width: 100%; height: 100%;
    z-index: -2; overflow: hidden;
}
.video-bg video {
    position: absolute; top: 50%; left: 50%;
    transform: translate(-50%, -50%);
    min-width: 100%; min-height: 100%;
    object-fit: cover; filter: brightness(0.35);
}
.video-bg::after {
    content: ''; position: absolute; top: 0; left: 0; width: 100%; height: 100%;
    background: linear-gradient(135deg, rgba(10,25,47,0.92) 0%, rgba(0,102,204,0.6) 100%);
}

/* Layout */
.page-wrapper { position: relative; min-height: 100vh; }

/* Navigation */
.navbar {
    position: sticky; top: 0; z-index: 100;
    background: rgba(10, 25, 47, 0.85);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    padding: 0 24px;
}
.navbar-inner {
    max-width: var(--max-width); margin: 0 auto;
    display: flex; align-items: center; justify-content: space-between;
    height: 64px;
}
.nav-brand {
    display: flex; align-items: center; gap: 12px;
    text-decoration: none; color: var(--text);
    font-weight: 700; font-size: 1.15rem;
}
.nav-brand img { height: 36px; }
.nav-links { display: flex; align-items: center; gap: 20px; list-style: none; }
.nav-links a {
    color: var(--text-dim); text-decoration: none;
    font-size: 0.9rem; font-weight: 500;
    transition: var(--transition); padding: 6px 0;
    border-bottom: 2px solid transparent;
}
.nav-links a:hover, .nav-links a.active { color: var(--text); border-bottom-color: var(--accent-blue); }
.nav-user {
    display: flex; align-items: center; gap: 12px;
}
.nav-user .user-email { font-size: 0.85rem; color: var(--text-dim); }
.nav-user .badge {
    background: var(--success); color: #000;
    font-size: 0.7rem; padding: 2px 8px; border-radius: 20px;
    font-weight: 600; text-transform: uppercase;
}
.nav-user .badge.expired { background: var(--danger); color: #fff; }

/* Buttons */
.btn {
    display: inline-flex; align-items: center; justify-content: center; gap: 8px;
    padding: 12px 24px; border-radius: var(--radius-sm); border: none;
    font-size: 0.95rem; font-weight: 600; cursor: pointer;
    text-decoration: none; transition: var(--transition);
    white-space: nowrap;
}
.btn-primary {
    background: linear-gradient(135deg, var(--primary-blue), var(--accent-blue));
    color: #fff; box-shadow: 0 4px 15px rgba(0, 168, 255, 0.3);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 6px 25px rgba(0, 168, 255, 0.5); }
.btn-outline {
    background: transparent; color: var(--text);
    border: 1px solid rgba(255,255,255,0.2);
}
.btn-outline:hover { background: rgba(255,255,255,0.1); border-color: rgba(255,255,255,0.4); }
.btn-danger { background: var(--danger); color: #fff; }
.btn-sm { padding: 8px 16px; font-size: 0.85rem; }
.btn-lg { padding: 16px 32px; font-size: 1.1rem; }
.btn-block { width: 100%; }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }

/* Cards & Containers */
.card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px;
    backdrop-filter: blur(10px);
    transition: var(--transition);
}
.card:hover { background: var(--surface-hover); }
.glass-container {
    background: rgba(255, 255, 255, 0.04);
    backdrop-filter: blur(16px);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 32px;
}

/* Forms */
.form-group { margin-bottom: 20px; }
.form-label {
    display: block; margin-bottom: 6px;
    font-size: 0.9rem; font-weight: 500; color: var(--text-dim);
}
.form-input {
    width: 100%; padding: 12px 16px;
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text); font-size: 0.95rem;
    transition: var(--transition); outline: none;
}
.form-input:focus { border-color: var(--accent-blue); box-shadow: 0 0 0 3px rgba(0,168,255,0.15); }
.form-input::placeholder { color: var(--text-muted); }
.form-error { color: var(--danger); font-size: 0.85rem; margin-top: 4px; }

/* Alerts */
.alert {
    padding: 14px 18px; border-radius: var(--radius-sm);
    margin-bottom: 20px; font-size: 0.9rem;
    border-left: 4px solid;
}
.alert-success { background: rgba(34,197,94,0.1); border-color: var(--success); color: var(--success); }
.alert-error { background: rgba(239,68,68,0.1); border-color: var(--danger); color: #fca5a5; }
.alert-warning { background: rgba(245,158,11,0.1); border-color: var(--warning); color: #fcd34d; }
.alert-info { background: rgba(59,130,246,0.1); border-color: var(--info); color: #93c5fd; }

/* Page Content */
.page-content { max-width: var(--max-width); margin: 0 auto; padding: 32px 24px; }
.page-header { margin-bottom: 32px; }
.page-header h1 {
    font-size: 2rem; font-weight: 700; margin-bottom: 8px;
}
.page-header p { color: var(--text-dim); font-size: 1.05rem; }

/* Hero Section */
.hero {
    text-align: center; padding: 60px 24px 40px;
    max-width: var(--max-width); margin: 0 auto;
}
.hero img.logo { height: 80px; margin-bottom: 24px; }
.hero h1 { font-size: 2.6rem; font-weight: 800; margin-bottom: 16px; line-height: 1.2; }
.hero p { font-size: 1.15rem; color: var(--text-dim); max-width: 600px; margin: 0 auto 32px; line-height: 1.7; }
.hero-actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

/* Manuals Grid */
.manuals-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 20px;
    margin-top: 32px;
}
.manual-card {
    background: var(--surface); border: 1px solid var(--border);
    border-radius: var(--radius); padding: 24px;
    transition: var(--transition); position: relative; overflow: hidden;
}
.manual-card::before {
    content: ''; position: absolute; top: 0; left: 0;
    width: 4px; height: 100%;
    background: linear-gradient(to bottom, var(--primary-blue), var(--accent-blue));
}
.manual-card:hover { transform: translateY(-4px); border-color: var(--accent-blue); }
.manual-card .manual-icon { font-size: 2rem; margin-bottom: 12px; }
.manual-card h3 { font-size: 1.15rem; font-weight: 600; margin-bottom: 8px; }
.manual-card p { font-size: 0.9rem; color: var(--text-dim); margin-bottom: 16px; line-height: 1.5; }
.manual-card .preview-badge {
    display: inline-block; background: rgba(0,168,255,0.15);
    color: var(--accent-blue); font-size: 0.75rem; padding: 3px 10px;
    border-radius: 20px; margin-bottom: 10px; font-weight: 500;
}

/* Tariffs Grid */
.tariffs-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 20px;
    margin-top: 32px;
}
.tariff-card {
    background: var(--surface); border: 1px solid var(--border);
    border-radius: var(--radius); padding: 28px;
    text-align: center; transition: var(--transition);
}
.tariff-card.featured {
    border-color: var(--accent-blue);
    background: rgba(0, 168, 255, 0.06);
    box-shadow: 0 0 30px rgba(0,168,255,0.1);
}
.tariff-card:hover { transform: translateY(-4px); }
.tariff-card .tariff-name { font-size: 1.2rem; font-weight: 600; margin-bottom: 8px; }
.tariff-card .tariff-price { font-size: 2.2rem; font-weight: 800; color: var(--accent-blue); margin-bottom: 4px; }
.tariff-card .tariff-price span { font-size: 1rem; font-weight: 400; color: var(--text-dim); }
.tariff-card .tariff-desc { font-size: 0.9rem; color: var(--text-dim); margin-bottom: 20px; line-height: 1.5; }
.tariff-card .tariff-features { list-style: none; text-align: left; margin-bottom: 24px; }
.tariff-card .tariff-features li {
    font-size: 0.9rem; padding: 6px 0; color: var(--text-dim);
    border-bottom: 1px solid rgba(255,255,255,0.05);
}
.tariff-card .tariff-features li::before { content: '✓ '; color: var(--success); font-weight: 700; margin-right: 6px; }

/* Dashboard */
.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
}
.stat-card { text-align: center; }
.stat-card .stat-value { font-size: 2rem; font-weight: 700; color: var(--accent-blue); }
.stat-card .stat-label { font-size: 0.85rem; color: var(--text-dim); margin-top: 4px; }

.subscription-item {
    display: flex; justify-content: space-between; align-items: center;
    padding: 16px; margin-bottom: 12px;
    background: var(--surface); border-radius: var(--radius-sm);
    border: 1px solid var(--border);
}
.subscription-item .sub-info h4 { font-size: 1rem; font-weight: 600; }
.subscription-item .sub-info p { font-size: 0.85rem; color: var(--text-dim); }
.subscription-item .sub-status {
    font-size: 0.8rem; padding: 4px 12px; border-radius: 20px;
    font-weight: 600;
}
.sub-status.active { background: rgba(34,197,94,0.15); color: var(--success); }
.sub-status.expired { background: rgba(239,68,68,0.15); color: var(--danger); }

/* Tables */
.table-wrapper { overflow-x: auto; }
table {
    width: 100%; border-collapse: collapse;
    font-size: 0.9rem;
}
table th {
    text-align: left; padding: 12px 16px;
    background: rgba(255,255,255,0.04); font-weight: 600;
    color: var(--text-dim); border-bottom: 1px solid var(--border);
}
table td {
    padding: 12px 16px; border-bottom: 1px solid rgba(255,255,255,0.04);
}
table tr:hover td { background: rgba(255,255,255,0.02); }

/* Manual Viewer */
.manual-viewer {
    display: flex; height: calc(100vh - 64px); /* 64px navbar */
    position: relative;
}
.manual-sidebar {
    width: 300px; min-width: 220px;
    background: rgba(10, 25, 47, 0.95);
    border-right: 1px solid var(--border);
    overflow-y: auto; overflow-x: hidden;
    transition: var(--transition);
}
.manual-sidebar.collapsed { width: 0; min-width: 0; overflow: hidden; }
.manual-content {
    flex: 1; overflow-y: auto; position: relative;
}
.manual-content iframe {
    width: 100%; height: 100%; border: none; background: #fff;
}
.manual-toggle-btn {
    position: absolute; top: 12px; left: 12px; z-index: 50;
    background: rgba(10,25,47,0.8); border: 1px solid var(--border);
    border-radius: 6px; padding: 8px; cursor: pointer; color: var(--text);
    transition: var(--transition);
}
.manual-toggle-btn:hover { background: rgba(255,255,255,0.1); }

/* Paywall */
.paywall {
    text-align: center; padding: 60px 24px;
}
.paywall h2 { font-size: 1.8rem; margin-bottom: 12px; }
.paywall p { color: var(--text-dim); margin-bottom: 32px; }

/* Footer */
.footer {
    text-align: center; padding: 32px 24px;
    border-top: 1px solid var(--border);
    font-size: 0.85rem; color: var(--text-muted);
    max-width: var(--max-width); margin: 0 auto;
}

/* Auth pages */
.auth-container {
    max-width: 420px; margin: 60px auto; padding: 0 24px;
}
.auth-container h1 { text-align: center; margin-bottom: 8px; }
.auth-container .auth-subtitle { text-align: center; color: var(--text-dim); margin-bottom: 28px; }
.auth-footer { text-align: center; margin-top: 20px; font-size: 0.9rem; color: var(--text-dim); }
.auth-footer a { color: var(--accent-blue); text-decoration: none; }

/* Utilities */
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-muted { color: var(--text-muted); }
.text-dim { color: var(--text-dim); }
.text-success { color: var(--success); }
.text-danger { color: var(--danger); }
.text-sm { font-size: 0.85rem; }
.mt-0 { margin-top: 0; }
.mt-1 { margin-top: 8px; }
.mt-2 { margin-top: 16px; }
.mt-3 { margin-top: 24px; }
.mt-4 { margin-top: 32px; }
.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: 8px; }
.mb-2 { margin-bottom: 16px; }
.mb-3 { margin-bottom: 24px; }
.mb-4 { margin-bottom: 32px; }
.flex { display: flex; }
.flex-between { justify-content: space-between; }
.flex-center { align-items: center; }
.gap-0 { gap: 4px; }
.gap-1 { gap: 8px; }
.gap-2 { gap: 16px; }
.gap-3 { gap: 24px; }
.truncate { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.hidden { display: none; }

/* Responsive */
@media (max-width: 768px) {
    .hero h1 { font-size: 1.8rem; }
    .hero p { font-size: 1rem; }
    .navbar { padding: 0 16px; }
    .nav-brand { font-size: 1rem; }
    .nav-brand img { height: 28px; }
    .nav-links { gap: 12px; }
    .nav-links a { font-size: 0.8rem; }
    .manuals-grid { grid-template-columns: 1fr; }
    .tariffs-grid { grid-template-columns: 1fr; }
    .dashboard-grid { grid-template-columns: 1fr; }
    .manual-sidebar { width: 260px; position: absolute; z-index: 40; height: 100%; }
    .manual-sidebar.collapsed { width: 0; }
    .page-content { padding: 24px 16px; }
    .glass-container { padding: 20px; }
}

@media (max-width: 480px) {
    .hero h1 { font-size: 1.5rem; }
    .hero-actions { flex-direction: column; }
    .hero-actions .btn { width: 100%; }
    .navbar-inner { height: 56px; }
    .nav-user .user-email { font-size: 0.75rem; }
    .page-header h1 { font-size: 1.5rem; }
}

/* Loading spinner */
.spinner {
    width: 24px; height: 24px;
    border: 3px solid rgba(255,255,255,0.2);
    border-top-color: var(--accent-blue);
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
    display: inline-block;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* Fade animations */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}
.animate-in { animation: fadeIn 0.3s ease-out; }

/* Select arrows in dark theme */
select.form-input {
    appearance: none;
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 20 20'%3e%3cpath stroke='%236b7280' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5' d='M6 8l4 4 4-4'/%3e%3c/svg%3e");
    background-position: right 12px center;
    background-repeat: no-repeat;
    background-size: 20px;
    padding-right: 40px;
}