/* Starkien - Pure Black Version */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&display=swap');
@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@300;400;500;600;700&display=swap');

:root {
    --bg-primary: #000000;
    --bg-secondary: #000000;
    --bg-card: #0a0a0a;
    --bg-card-hover: #141414;
    
    --border-subtle: rgba(255, 255, 255, 0.05);
    --border-medium: rgba(255, 255, 255, 0.1);
    --border-accent: rgba(6, 182, 212, 0.3);
    
    --text-primary: #ffffff;
    --text-secondary: #e5e7eb;
    --text-muted: #9ca3af;
    --text-dark: #6b7280;
    
    --accent-primary: #06B6D4;
    --accent-hover: #0891B2;
    --accent-light: #22D3EE;
    
    --gradient-primary: linear-gradient(135deg, #0891B2 0%, #22D3EE 100%);
    
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.4);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.5);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.6);
    --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.7);
    --shadow-glow-sm: 0 0 20px rgba(6, 182, 212, 0.25);
    --shadow-glow-md: 0 0 30px rgba(6, 182, 212, 0.35);
    
    --container-max: 1280px;
    --section-padding: 120px;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Space Grotesk', 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    background: #000000;
    position: relative;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

nav {
    position: fixed;
    top: 0;
    width: 100%;
    background: transparent;
    z-index: 1000;
    padding: 16px 24px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    transform: translateY(0);
}

nav.scroll-down {
    transform: translateY(-100%);
}

nav.scroll-up {
    transform: translateY(0);
    background: rgba(0, 0, 0, 0.9);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
}

.nav-container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 22px;
    font-weight: 700;
    color: var(--text-primary);
    text-decoration: none;
    transition: all 0.3s ease;
    letter-spacing: -0.5px;
    position: relative;
}

.logo::after {
    content: '';
    position: absolute;
    bottom: -3px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: width 0.3s ease;
}

.logo:hover::after {
    width: 100%;
}

.nav-links {
    display: flex;
    gap: 32px;
    list-style: none;
    align-items: center;
}

.nav-links a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    transition: color 0.3s ease;
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--accent-primary);
    transition: width 0.3s ease;
}

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

.nav-links a:hover::after,
.nav-links a.active::after {
    width: 100%;
}

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

.cta-button {
    background: var(--gradient-primary);
    color: white;
    padding: 10px 24px;
    border-radius: 8px;
    font-weight: 600;
    font-size: 14px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    border: none;
    cursor: pointer;
    text-decoration: none;
    display: inline-block;
    box-shadow: var(--shadow-glow-sm);
}

.cta-button:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow-md);
}

/* Mobile Menu (Architecture-aligned) */
.mobile-menu-btn {
    display: none;
    width: 40px;
    height: 40px;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    border: 1px solid rgba(6, 182, 212, 0.3);
    background: transparent;
    cursor: pointer;
    transition: all 0.2s ease;
}

.mobile-menu-btn:hover {
    border-color: var(--accent-primary);
    background: rgba(6, 182, 212, 0.08);
}

.mobile-menu-btn .dot-grid {
    display: grid;
    grid-template-columns: repeat(2, 8px);
    gap: 4px;
}

.mobile-menu-btn .dot {
    width: 8px;
    height: 8px;
}

.mobile-menu-btn .dot-1 { background: #22D3EE; }
.mobile-menu-btn .dot-2 { background: #A855F7; }
.mobile-menu-btn .dot-3 { background: #EC4899; }
.mobile-menu-btn .dot-4 { background: #60A5FA; }

.mobile-menu {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.9);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
    z-index: 1100;
}

.mobile-menu.open {
    opacity: 1;
    visibility: visible;
}

.mobile-menu-content {
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 32px;
    padding: 24px;
}

.mobile-menu a {
    font-size: 24px;
    font-weight: 500;
    color: var(--text-muted);
    text-decoration: none;
    transition: color 0.2s ease;
}

.mobile-menu a:hover {
    color: var(--accent-primary);
}

.mobile-menu a.active {
    color: var(--accent-primary);
}

.mobile-menu .mobile-cta {
    padding: 12px 32px;
    border: 2px solid var(--accent-primary);
    color: var(--accent-primary);
    border-radius: 10px;
    font-size: 18px;
    font-weight: 700;
    text-decoration: none;
    margin-top: 12px;
}

.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    padding: 0;
    background: #000000;
}

#hero-video {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    z-index: 0;
    opacity: 0.4;
}

.hero-content {
    max-width: 900px;
    text-align: center;
    z-index: 2;
    position: relative;
}

.hero-badge {
    display: inline-block;
    background: rgba(6, 182, 212, 0.08);
    border: 1px solid rgba(6, 182, 212, 0.25);
    color: var(--accent-light);
    padding: 8px 20px;
    border-radius: 24px;
    font-size: 12px;
    font-weight: 700;
    margin-bottom: 32px;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    backdrop-filter: blur(8px);
    box-shadow: 0 4px 12px rgba(6, 182, 212, 0.1);
}

.hero h1 {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 72px;
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: 28px;
    letter-spacing: -2px;
}

.hero h1 .highlight {
    background: linear-gradient(135deg, #22D3EE 0%, #06B6D4 50%, #0891B2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    position: relative;
    display: inline-block;
}

.hero .subtitle {
    font-size: 21px;
    color: var(--text-muted);
    max-width: 700px;
    margin: 0 auto 48px;
    line-height: 1.7;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    padding: 16px 36px;
    border-radius: 10px;
    font-size: 16px;
    font-weight: 600;
    border: none;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    text-decoration: none;
    display: inline-block;
    box-shadow: var(--shadow-glow-sm);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-glow-md);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-primary);
    padding: 16px 36px;
    border-radius: 10px;
    font-size: 16px;
    font-weight: 600;
    border: 1px solid var(--border-medium);
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    text-decoration: none;
    display: inline-block;
    backdrop-filter: blur(8px);
}

.btn-secondary:hover {
    border-color: var(--accent-primary);
    background: rgba(6, 182, 212, 0.08);
    transform: translateY(-2px);
}

section {
    padding: var(--section-padding) 32px;
    max-width: var(--container-max);
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.section-header {
    text-align: center;
    margin-bottom: 80px;
}

.section-badge {
    display: inline-block;
    background: rgba(6, 182, 212, 0.08);
    border: 1px solid rgba(6, 182, 212, 0.25);
    color: var(--accent-light);
    padding: 6px 18px;
    border-radius: 20px;
    font-size: 11px;
    font-weight: 700;
    margin-bottom: 20px;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    backdrop-filter: blur(8px);
}

.section-title {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 52px;
    font-weight: 700;
    margin-bottom: 20px;
    letter-spacing: -1.5px;
    line-height: 1.1;
}

.section-subtitle {
    font-size: 19px;
    color: var(--text-muted);
    max-width: 700px;
    margin: 0 auto;
    line-height: 1.7;
}

.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 24px;
}

.card {
    background: rgba(255,255,255,0.02);
    border: 1px solid var(--border-subtle);
    border-radius: 16px;
    padding: 36px;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
    backdrop-filter: blur(8px);
}

.card:hover {
    background: rgba(255,255,255,0.04);
    border-color: var(--border-medium);
    transform: translateY(-6px);
    box-shadow: var(--shadow-xl), var(--shadow-glow-sm);
}

.card-icon {
    width: 52px;
    height: 52px;
    background: rgba(6, 182, 212, 0.1);
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 24px;
    color: var(--accent-primary);
    font-size: 24px;
    box-shadow: 0 4px 12px rgba(6, 182, 212, 0.15);
}

.card h3 {
    font-size: 22px;
    font-weight: 600;
    margin-bottom: 14px;
    color: var(--text-primary);
}

.card p {
    color: var(--text-muted);
    line-height: 1.7;
    font-size: 15px;
}

.feature-section {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
    margin-bottom: 120px;
}

.feature-content h2 {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 44px;
    font-weight: 700;
    margin-bottom: 24px;
    letter-spacing: -1.2px;
    line-height: 1.2;
}

.feature-content p {
    color: var(--text-muted);
    font-size: 18px;
    line-height: 1.8;
    margin-bottom: 24px;
}

.feature-list {
    list-style: none;
    margin-top: 28px;
}

.feature-list li {
    padding: 14px 0;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 14px;
    font-size: 16px;
}

.feature-list li:before {
    content: "✓";
    color: var(--accent-primary);
    font-weight: 700;
    font-size: 20px;
    background: rgba(6, 182, 212, 0.1);
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 6px;
    flex-shrink: 0;
}

.feature-image {
    background: rgba(255,255,255,0.02);
    border: 1px solid var(--border-subtle);
    border-radius: 20px;
    padding: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 400px;
    box-shadow: var(--shadow-lg);
    transition: all 0.4s ease;
}

.feature-image:hover {
    transform: scale(1.02);
    box-shadow: var(--shadow-xl), var(--shadow-glow-sm);
}

.feature-image img {
    max-width: 100%;
    height: auto;
    border-radius: 12px;
    box-shadow: var(--shadow-lg);
}

footer {
    background: #000000;
    border-top: 1px solid var(--border-subtle);
    padding: 80px 32px 40px;
    position: relative;
    z-index: 1;
}

.footer-content {
    max-width: var(--container-max);
    margin: 0 auto;
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 60px;
    margin-bottom: 48px;
}

.footer-brand h3 {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 16px;
}

.footer-brand p {
    color: var(--text-muted);
    line-height: 1.7;
    margin-bottom: 20px;
}

.footer-section h4 {
    font-weight: 600;
    margin-bottom: 20px;
    color: var(--text-primary);
    font-size: 14px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: 14px;
}

.footer-links a {
    color: var(--text-muted);
    text-decoration: none;
    transition: color 0.3s ease;
    font-size: 15px;
}

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

.footer-bottom {
    max-width: var(--container-max);
    margin: 0 auto;
    padding-top: 40px;
    border-top: 1px solid var(--border-subtle);
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: var(--text-dark);
    font-size: 14px;
}

@media (max-width: 1024px) {
    .hero h1 {
        font-size: 64px;
    }
    
    .section-title {
        font-size: 42px;
    }
    
    .feature-section {
        grid-template-columns: 1fr;
        gap: 48px;
    }
    
    .footer-content {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    :root {
        --section-padding: 80px;
    }
    
    .nav-container {
        padding: 0;
    }
    
    .nav-links {
        display: none;
    }

    .cta-button.nav-cta {
        display: none;
    }

    .mobile-menu-btn {
        display: flex;
    }
    
    .hero {
        padding: 120px 24px 80px;
    }
    
    .hero h1 {
        font-size: 48px;
    }
    
    .hero .subtitle {
        font-size: 18px;
    }
    
    .section-title {
        font-size: 36px;
    }
    
    .card-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: 16px;
        text-align: center;
    }
}