/* ============================================
   DeepSeis — Marketing Landing Page Styles
   ============================================ */

/* --- Reset & Base --- */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --color-bg: #0a0a0f;
    --color-surface: #12121a;
    --color-surface-2: #1a1a26;
    --color-border: #2a2a3a;
    --color-text: #e4e4ef;
    --color-text-muted: #8888a0;
    --color-text-dim: #5a5a72;
    --color-primary: #6366f1;
    --color-primary-light: #818cf8;
    --color-primary-dark: #4f46e5;
    --color-accent: #06b6d4;
    --color-accent-light: #22d3ee;
    --color-success: #10b981;
    --color-warning: #f59e0b;
    --gradient-primary: linear-gradient(135deg, #6366f1, #06b6d4);
    --gradient-hero: linear-gradient(135deg, #6366f1 0%, #8b5cf6 50%, #06b6d4 100%);
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --shadow-sm: 0 2px 8px rgba(0,0,0,0.3);
    --shadow-md: 0 4px 20px rgba(0,0,0,0.4);
    --shadow-lg: 0 8px 40px rgba(0,0,0,0.5);
    --shadow-glow: 0 0 40px rgba(99,102,241,0.15);
}

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

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

a {
    color: inherit;
    text-decoration: none;
}

img {
    max-width: 100%;
    display: block;
}

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

/* --- Typography --- */
.text-gradient {
    background: var(--gradient-hero);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* --- Buttons --- */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 22px;
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: 0.9rem;
    transition: all 0.25s ease;
    cursor: pointer;
    border: none;
    font-family: var(--font-sans);
    white-space: nowrap;
}

.btn svg {
    width: 18px;
    height: 18px;
    flex-shrink: 0;
}

.btn-sm {
    padding: 8px 18px;
    font-size: 0.85rem;
}

.btn-lg {
    padding: 14px 32px;
    font-size: 1rem;
    border-radius: var(--radius-lg);
}

.btn-primary {
    background: var(--gradient-primary);
    color: #fff;
    box-shadow: 0 4px 15px rgba(99,102,241,0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 25px rgba(99,102,241,0.45);
}

.btn-outline {
    background: transparent;
    color: var(--color-text);
    border: 1.5px solid var(--color-border);
}

.btn-outline:hover {
    border-color: var(--color-primary);
    color: var(--color-primary-light);
    background: rgba(99,102,241,0.05);
}

.btn-white {
    background: #fff;
    color: var(--color-primary-dark);
    box-shadow: var(--shadow-md);
}

.btn-white:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-outline-white {
    background: transparent;
    color: #fff;
    border: 1.5px solid rgba(255,255,255,0.3);
}

.btn-outline-white:hover {
    border-color: rgba(255,255,255,0.7);
    background: rgba(255,255,255,0.1);
}

/* --- Navbar --- */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 16px 0;
    transition: all 0.3s ease;
    background: transparent;
}

.navbar.scrolled {
    background: rgba(10, 10, 15, 0.9);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--color-border);
    padding: 12px 0;
}

.nav-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 700;
    font-size: 1.25rem;
    color: #fff;
}

.logo-icon {
    font-size: 1.5rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav-links a {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--color-text-muted);
    transition: color 0.2s ease;
}

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

.nav-links .btn-primary {
    color: #fff;
}

.mobile-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}

.mobile-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-text);
    border-radius: 2px;
    transition: all 0.3s ease;
}

/* --- Hero Section --- */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 120px 0 80px;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    z-index: 0;
}

.hero-grid {
    position: absolute;
    inset: 0;
    background-image: 
        linear-gradient(rgba(99,102,241,0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(99,102,241,0.03) 1px, transparent 1px);
    background-size: 60px 60px;
    mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
    -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
}

.hero-glow {
    position: absolute;
    top: -20%;
    left: 50%;
    transform: translateX(-50%);
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(99,102,241,0.12) 0%, rgba(6,182,212,0.06) 40%, transparent 70%);
    pointer-events: none;
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 900px;
    margin: 0 auto;
}

.hero-badge {
    display: inline-block;
    padding: 6px 18px;
    border-radius: 50px;
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    color: var(--color-primary-light);
    background: rgba(99,102,241,0.1);
    border: 1px solid rgba(99,102,241,0.2);
    margin-bottom: 28px;
}

.hero h1 {
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 24px;
    letter-spacing: -0.02em;
    color: #fff;
}

.hero-subtitle {
    font-size: clamp(1rem, 2vw, 1.25rem);
    color: var(--color-text-muted);
    max-width: 700px;
    margin: 0 auto 40px;
    line-height: 1.7;
}

.hero-actions {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 60px;
}

.hero-stats {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 32px;
    padding-top: 40px;
    border-top: 1px solid var(--color-border);
    max-width: 500px;
    margin: 0 auto;
}

.stat {
    text-align: center;
}

.stat-value {
    display: block;
    font-size: 1.5rem;
    font-weight: 700;
    color: #fff;
    font-family: var(--font-mono);
}

.stat-label {
    font-size: 0.8rem;
    color: var(--color-text-dim);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.stat-divider {
    width: 1px;
    height: 40px;
    background: var(--color-border);
}

/* --- Section Common --- */
.section-header {
    text-align: center;
    margin-bottom: 64px;
}

.section-tag {
    display: inline-block;
    padding: 4px 14px;
    border-radius: 50px;
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--color-accent);
    background: rgba(6,182,212,0.1);
    border: 1px solid rgba(6,182,212,0.2);
    margin-bottom: 16px;
}

.section-header h2 {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 800;
    color: #fff;
    margin-bottom: 16px;
    letter-spacing: -0.02em;
}

.section-desc {
    font-size: 1.1rem;
    color: var(--color-text-muted);
    max-width: 650px;
    margin: 0 auto;
    line-height: 1.7;
}

/* --- Features Section --- */
.features {
    padding: 120px 0;
    background: var(--color-surface);
    position: relative;
}

.features::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--color-border), transparent);
}

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

.feature-card {
    padding: 36px 28px;
    border-radius: var(--radius-lg);
    background: var(--color-surface-2);
    border: 1px solid var(--color-border);
    transition: all 0.3s ease;
}

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

.feature-icon {
    width: 48px;
    height: 48px;
    margin-bottom: 20px;
    color: var(--color-primary-light);
}

.feature-icon svg {
    width: 100%;
    height: 100%;
}

.feature-card h3 {
    font-size: 1.15rem;
    font-weight: 700;
    color: #fff;
    margin-bottom: 12px;
}

.feature-card p {
    font-size: 0.92rem;
    color: var(--color-text-muted);
    line-height: 1.65;
}

/* --- Workflow Section --- */
.workflow {
    padding: 120px 0;
    position: relative;
}

.workflow-steps {
    max-width: 800px;
    margin: 0 auto;
}

.workflow-step {
    display: flex;
    gap: 32px;
    align-items: flex-start;
}

.step-number {
    flex-shrink: 0;
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-md);
    background: var(--gradient-primary);
    color: #fff;
    font-weight: 800;
    font-size: 1.2rem;
    font-family: var(--font-mono);
    box-shadow: 0 4px 15px rgba(99,102,241,0.3);
}

.step-content h3 {
    font-size: 1.3rem;
    font-weight: 700;
    color: #fff;
    margin-bottom: 10px;
}

.step-content p {
    color: var(--color-text-muted);
    margin-bottom: 16px;
    line-height: 1.65;
}

.step-details {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.step-details li {
    position: relative;
    padding-left: 20px;
    font-size: 0.9rem;
    color: var(--color-text-muted);
}

.step-details li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--color-primary-light);
    font-weight: 600;
}

.workflow-connector {
    width: 2px;
    height: 40px;
    background: linear-gradient(to bottom, var(--color-primary), var(--color-border));
    margin-left: 27px;
    margin-bottom: 32px;
    border-radius: 2px;
}

/* --- Use Cases Section --- */
.usecases {
    padding: 120px 0;
    background: var(--color-surface);
    position: relative;
}

.usecases::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--color-border), transparent);
}

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

.usecase-card {
    border-radius: var(--radius-lg);
    overflow: hidden;
    background: var(--color-surface-2);
    border: 1px solid var(--color-border);
    transition: all 0.3s ease;
}

.usecase-card:hover {
    border-color: var(--color-accent);
    transform: translateY(-4px);
    box-shadow: 0 0 30px rgba(6,182,212,0.1);
}

.usecase-image {
    height: 180px;
    position: relative;
    overflow: hidden;
}

.usecase-pattern {
    position: absolute;
    inset: 0;
}

.pattern-1 {
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
}

.pattern-1::after {
    content: '';
    position: absolute;
    inset: 0;
    background: 
        radial-gradient(circle at 30% 40%, rgba(99,102,241,0.3) 0%, transparent 50%),
        radial-gradient(circle at 70% 60%, rgba(6,182,212,0.2) 0%, transparent 50%);
}

.pattern-2 {
    background: linear-gradient(135deg, #1a2e1a 0%, #162e21 100%);
}

.pattern-2::after {
    content: '';
    position: absolute;
    inset: 0;
    background: 
        radial-gradient(circle at 40% 30%, rgba(16,185,129,0.3) 0%, transparent 50%),
        radial-gradient(circle at 60% 70%, rgba(6,182,212,0.2) 0%, transparent 50%);
}

.pattern-3 {
    background: linear-gradient(135deg, #2e1a1a 0%, #2e1621 100%);
}

.pattern-3::after {
    content: '';
    position: absolute;
    inset: 0;
    background: 
        radial-gradient(circle at 30% 50%, rgba(245,158,11,0.3) 0%, transparent 50%),
        radial-gradient(circle at 70% 40%, rgba(99,102,241,0.2) 0%, transparent 50%);
}

.usecase-content {
    padding: 28px;
}

.usecase-tag {
    display: inline-block;
    padding: 3px 10px;
    border-radius: 50px;
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-accent);
    background: rgba(6,182,212,0.1);
    border: 1px solid rgba(6,182,212,0.2);
    margin-bottom: 14px;
}

.usecase-content h3 {
    font-size: 1.2rem;
    font-weight: 700;
    color: #fff;
    margin-bottom: 10px;
}

.usecase-content p {
    font-size: 0.9rem;
    color: var(--color-text-muted);
    line-height: 1.65;
}

/* --- Specs Section --- */
.specs {
    padding: 120px 0;
}

.specs-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.spec-item {
    padding: 24px;
    border-radius: var(--radius-md);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    display: flex;
    flex-direction: column;
    gap: 8px;
    transition: all 0.2s ease;
}

.spec-item:hover {
    border-color: var(--color-primary);
}

.spec-label {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--color-text-dim);
}

.spec-value {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--color-text);
    font-family: var(--font-mono);
}

/* --- CTA Section --- */
.cta {
    padding: 120px 0;
    background: var(--gradient-primary);
    position: relative;
    overflow: hidden;
}

.cta::before {
    content: '';
    position: absolute;
    inset: 0;
    background: 
        radial-gradient(circle at 20% 50%, rgba(255,255,255,0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 50%, rgba(0,0,0,0.2) 0%, transparent 50%);
}

.cta-inner {
    position: relative;
    z-index: 1;
    text-align: center;
}

.cta-content h2 {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 800;
    color: #fff;
    margin-bottom: 20px;
}

.cta-content p {
    font-size: 1.15rem;
    color: rgba(255,255,255,0.85);
    max-width: 600px;
    margin: 0 auto 36px;
    line-height: 1.7;
}

.cta-actions {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 24px;
}

.cta-note {
    font-size: 0.9rem;
    color: rgba(255,255,255,0.7);
}

/* --- Footer --- */
.footer {
    padding: 60px 0 40px;
    border-top: 1px solid var(--color-border);
    background: var(--color-bg);
}

.footer-inner {
    text-align: center;
}

.footer-brand {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-weight: 700;
    font-size: 1.25rem;
    color: #fff;
    margin-bottom: 12px;
}

.footer-desc {
    color: var(--color-text-muted);
    margin-bottom: 24px;
    font-size: 0.9rem;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 28px;
    margin-bottom: 32px;
    flex-wrap: wrap;
}

.footer-links a {
    font-size: 0.9rem;
    color: var(--color-text-muted);
    transition: color 0.2s ease;
}

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

.footer-bottom {
    padding-top: 24px;
    border-top: 1px solid var(--color-border);
}

.footer-bottom p {
    font-size: 0.8rem;
    color: var(--color-text-dim);
}

/* --- Animations --- */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.animate-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease;
}

.animate-on-scroll.visible {
    opacity: 1;
    transform: translateY(0);
}

/* --- Responsive --- */
@media (max-width: 1024px) {
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .usecases-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .specs-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: rgba(10, 10, 15, 0.98);
        flex-direction: column;
        justify-content: center;
        align-items: center;
        gap: 24px;
        z-index: 999;
    }
    
    .nav-links.open {
        display: flex;
    }
    
    .mobile-toggle {
        display: flex;
        z-index: 1001;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .usecases-grid {
        grid-template-columns: 1fr;
    }
    
    .specs-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .hero-stats {
        gap: 20px;
    }
    
    .workflow-step {
        flex-direction: column;
        gap: 16px;
    }
    
    .workflow-connector {
        margin-left: 0;
        height: 24px;
    }
    
    .hero-actions {
        flex-direction: column;
        align-items: center;
    }
    
    .cta-actions {
        flex-direction: column;
        align-items: center;
    }
}

@media (max-width: 480px) {
    .specs-grid {
        grid-template-columns: 1fr;
    }
    
    .hero-stats {
        flex-direction: column;
        gap: 16px;
    }
    
    .stat-divider {
        width: 60px;
        height: 1px;
    }
}