/* ChronoVault Pro - Modern Dark Glassmorphism CSS System */
:root {
    --bg-primary: #0a0c10;
    --bg-secondary: #12161f;
    --bg-card: rgba(22, 27, 38, 0.7);
    --border-color: rgba(255, 255, 255, 0.08);
    --border-glow: rgba(56, 189, 248, 0.3);
    
    --text-main: #f3f4f6;
    --text-muted: #9ca3af;
    --text-dim: #6b7280;
    
    --primary: #38bdf8;
    --primary-glow: #0284c7;
    --accent: #818cf8;
    --purple-glow: #c084fc;
    
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
}

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

html {
    scroll-behavior: smooth;
}

body {
    background-color: var(--bg-primary);
    color: var(--text-main);
    font-family: var(--font-sans);
    line-height: 1.6;
    overflow-x: hidden;
}

/* Glassmorphism Utilities */
.glass {
    background: var(--bg-card);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--border-color);
}

/* Typography & Colors */
.gradient-text {
    background: linear-gradient(135deg, #38bdf8 0%, #818cf8 50%, #c084fc 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* Header & Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(10, 12, 16, 0.8);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 24px;
}

.brand {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: var(--text-main);
    font-weight: 700;
    font-size: 1.2rem;
}

.badge-pro {
    background: linear-gradient(135deg, #38bdf8, #818cf8);
    color: #000;
    font-size: 0.75rem;
    padding: 2px 6px;
    border-radius: 4px;
    font-weight: 800;
}

.nav-links {
    display: flex;
    gap: 28px;
}

.nav-links a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.95rem;
    font-weight: 500;
    transition: color 0.2s ease;
}

.nav-links a:hover {
    color: var(--primary);
}

.nav-actions {
    display: flex;
    gap: 12px;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 9px 18px;
    border-radius: 8px;
    font-weight: 600;
    font-size: 0.9rem;
    text-decoration: none;
    transition: all 0.2s ease;
    cursor: pointer;
}

.btn-primary {
    background: linear-gradient(135deg, #38bdf8 0%, #0284c7 100%);
    color: #fff;
    box-shadow: 0 4px 14px rgba(56, 189, 248, 0.3);
}

.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 20px rgba(56, 189, 248, 0.45);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-main);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.2);
}

.btn-large {
    padding: 14px 28px;
    font-size: 1rem;
    border-radius: 10px;
}

.btn-full {
    width: 100%;
    margin-top: 20px;
}

/* Hero Section */
.hero {
    position: relative;
    padding: 160px 24px 80px;
    text-align: center;
}

.hero-glow {
    position: absolute;
    top: 10%;
    left: 50%;
    transform: translateX(-50%);
    width: 600px;
    height: 350px;
    background: radial-gradient(circle, rgba(56, 189, 248, 0.15) 0%, rgba(129, 140, 248, 0.08) 50%, transparent 70%);
    filter: blur(80px);
    pointer-events: none;
}

.hero-container {
    max-width: 900px;
    margin: 0 auto;
    position: relative;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 14px;
    border-radius: 20px;
    background: rgba(56, 189, 248, 0.1);
    border: 1px solid rgba(56, 189, 248, 0.25);
    color: var(--primary);
    font-size: 0.85rem;
    font-weight: 500;
    margin-bottom: 24px;
}

.pulse {
    width: 8px;
    height: 8px;
    background-color: var(--primary);
    border-radius: 50%;
    box-shadow: 0 0 10px var(--primary);
}

.hero-title {
    font-size: 3.4rem;
    font-weight: 800;
    line-height: 1.15;
    letter-spacing: -0.02em;
    margin-bottom: 20px;
}

.hero-subtitle {
    font-size: 1.2rem;
    color: var(--text-muted);
    max-width: 720px;
    margin: 0 auto 36px;
}

.hero-cta {
    display: flex;
    justify-content: center;
    gap: 16px;
    margin-bottom: 20px;
}

.hero-guarantee {
    font-size: 0.85rem;
    color: var(--text-dim);
}

/* App Preview Mockup Card */
.app-preview-card {
    margin-top: 60px;
    background: #0f131c;
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.12);
    box-shadow: 0 25px 60px rgba(0, 0, 0, 0.6);
    overflow: hidden;
    text-align: left;
}

.mac-titlebar {
    background: #181d28;
    padding: 12px 16px;
    display: flex;
    align-items: center;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.mac-dots {
    display: flex;
    gap: 8px;
}

.dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

.dot.red { background: #ff5f56; }
.dot.yellow { background: #ffbd2e; }
.dot.green { background: #27c93f; }

.mac-title {
    margin-left: auto;
    margin-right: auto;
    font-size: 0.85rem;
    color: var(--text-muted);
    font-weight: 500;
}

.mockup-body {
    padding: 24px;
}

.mockup-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    margin-bottom: 20px;
}

.mock-card {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 16px;
}

.mock-icon {
    font-size: 1.4rem;
}

.mock-val {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--text-main);
    margin-top: 4px;
}

.mock-lbl {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.mockup-terminal {
    background: #06080c;
    border-radius: 6px;
    padding: 12px 16px;
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.mockup-terminal code {
    font-family: var(--font-mono);
    color: #4ade80;
    font-size: 0.85rem;
}

/* Sections Common */
.section-container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 100px 24px;
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-title {
    font-size: 2.2rem;
    font-weight: 700;
    margin-bottom: 12px;
}

.section-desc {
    color: var(--text-muted);
    font-size: 1.1rem;
}

/* Features Grid */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 24px;
}

.feature-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 30px;
    transition: transform 0.2s ease, border-color 0.2s ease;
}

.feature-card:hover {
    transform: translateY(-4px);
    border-color: var(--border-glow);
}

.feature-icon {
    font-size: 2.2rem;
    margin-bottom: 16px;
}

.feature-card h3 {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 8px;
}

.feature-card p {
    color: var(--text-muted);
    font-size: 0.95rem;
}

/* 3-2-1 Matrix Section */
.matrix-box {
    background: linear-gradient(135deg, rgba(18, 22, 31, 0.9), rgba(15, 23, 42, 0.8));
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 48px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    align-items: center;
}

.badge-tag {
    color: var(--primary);
    font-size: 0.85rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 12px;
}

.matrix-list {
    list-style: none;
    margin-top: 20px;
}

.matrix-list li {
    margin-bottom: 12px;
    font-size: 1rem;
}

.matrix-visual {
    background: #080a0f;
    border-radius: 12px;
    padding: 30px;
    border: 1px solid var(--border-color);
    text-align: center;
}

.node {
    padding: 12px 20px;
    border-radius: 8px;
    font-weight: 600;
    font-size: 0.95rem;
}

.node.main {
    background: rgba(56, 189, 248, 0.15);
    border: 1px solid var(--primary);
    color: var(--primary);
}

.arrow {
    margin: 16px 0;
    color: var(--text-dim);
    font-family: var(--font-mono);
    font-size: 0.85rem;
}

.nodes-row {
    display: flex;
    gap: 10px;
    justify-content: center;
}

.node.cloud {
    background: rgba(129, 140, 248, 0.15);
    border: 1px solid var(--accent);
    color: var(--accent);
    font-size: 0.85rem;
    padding: 8px 12px;
}

.node.disk {
    background: rgba(192, 132, 252, 0.15);
    border: 1px solid var(--purple-glow);
    color: var(--purple-glow);
    font-size: 0.85rem;
    padding: 8px 12px;
}

/* Tutorials Step-by-Step Tabs */
.tabs-container {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    overflow: hidden;
}

.tab-buttons {
    display: flex;
    background: rgba(0, 0, 0, 0.2);
    border-bottom: 1px solid var(--border-color);
}

.tab-btn {
    flex: 1;
    padding: 16px;
    background: none;
    border: none;
    color: var(--text-muted);
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    transition: all 0.2s ease;
}

.tab-btn.active, .tab-btn:hover {
    color: var(--primary);
    background: rgba(56, 189, 248, 0.05);
    border-bottom: 2px solid var(--primary);
}

.tab-content {
    display: none;
    padding: 36px;
}

.tab-content.active {
    display: block;
}

.step-list {
    margin-top: 16px;
    margin-left: 20px;
}

.step-list li {
    margin-bottom: 12px;
    color: var(--text-muted);
}

.step-list code {
    font-family: var(--font-mono);
    background: rgba(255, 255, 255, 0.08);
    padding: 2px 6px;
    border-radius: 4px;
    color: var(--primary);
}

/* Pricing Grid */
.pricing-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    align-items: stretch;
}

.price-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 36px 28px;
    display: flex;
    flex-direction: column;
    position: relative;
}

.price-card.popular {
    border-color: var(--primary);
    background: linear-gradient(180deg, rgba(56, 189, 248, 0.08) 0%, var(--bg-secondary) 100%);
}

.popular-badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--primary);
    color: #000;
    font-size: 0.75rem;
    font-weight: 800;
    padding: 3px 12px;
    border-radius: 12px;
    text-transform: uppercase;
}

.price-header h3 {
    font-size: 1.3rem;
    font-weight: 700;
}

.price-header p {
    color: var(--text-muted);
    font-size: 0.85rem;
}

.price {
    font-size: 2.8rem;
    font-weight: 800;
    margin: 20px 0;
    color: var(--text-main);
}

.price span {
    font-size: 0.9rem;
    font-weight: 400;
    color: var(--text-muted);
}

.price-features {
    list-style: none;
    margin-top: 10px;
    flex-grow: 1;
}

.price-features li {
    padding: 8px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.04);
    font-size: 0.9rem;
    color: var(--text-muted);
}

.price-features strong {
    color: var(--text-main);
}

/* FAQ Grid */
.faq-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.faq-item {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 24px;
}

.faq-item h4 {
    font-size: 1.05rem;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text-main);
}

.faq-item p {
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* Footer */
.footer {
    border-top: 1px solid var(--border-color);
    padding: 40px 24px;
    background: #07090d;
}

.footer-container {
    max-width: 1100px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer-left p {
    color: var(--text-dim);
    font-size: 0.85rem;
    margin-top: 6px;
}

.footer-right {
    display: flex;
    gap: 20px;
}

.footer-right a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.9rem;
}

.footer-right a:hover {
    color: var(--primary);
}

/* Responsive */
@media (max-width: 868px) {
    .hero-title { font-size: 2.2rem; }
    .matrix-box, .pricing-grid, .faq-grid { grid-template-columns: 1fr; }
    .mockup-grid { grid-template-columns: 1fr; }
    .nav-links { display: none; }
}

/* Language Selector & Promo Upgrade Banner */
.lang-select {
    background: rgba(255, 255, 255, 0.08);
    color: var(--text-main);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 6px 12px;
    font-size: 0.85rem;
    font-weight: 500;
    outline: none;
    cursor: pointer;
    transition: background 0.2s ease;
}

.lang-select option {
    background: var(--bg-secondary);
    color: var(--text-main);
}

.lang-select:hover {
    background: rgba(255, 255, 255, 0.15);
}

.promo-banner {
    background: linear-gradient(135deg, rgba(56, 189, 248, 0.12) 0%, rgba(129, 140, 248, 0.15) 100%);
    border: 1px solid rgba(56, 189, 248, 0.3);
    border-radius: 12px;
    padding: 20px 24px;
    margin-bottom: 36px;
    display: flex;
    align-items: center;
    gap: 16px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
}

.promo-icon {
    font-size: 2rem;
}

.promo-content h4 {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 4px;
}

.promo-content p {
    font-size: 0.9rem;
    color: var(--text-muted);
}

.promo-content code {
    font-family: var(--font-mono);
    background: rgba(56, 189, 248, 0.2);
    color: #fff;
    padding: 2px 8px;
    border-radius: 4px;
    font-weight: 700;
    letter-spacing: 0.05em;
}

/* Gallery Section Grid & Cards */
.gallery-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.gallery-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 14px;
    overflow: hidden;
    transition: transform 0.2s ease, border-color 0.2s ease;
}

.gallery-card:hover {
    transform: translateY(-4px);
    border-color: var(--primary);
}

.gallery-img {
    width: 100%;
    height: auto;
    display: block;
    border-bottom: 1px solid var(--border-color);
}

.gallery-info {
    padding: 20px;
}

.gallery-info h4 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 6px;
    color: var(--text-main);
}

.gallery-info p {
    font-size: 0.88rem;
    color: var(--text-muted);
}