:root {
    --bg-color: #050505;
    --text-primary: #ffffff;
    --text-secondary: rgba(255, 255, 255, 0.6);
    --accent-color: rgba(255, 255, 255, 0.9);
    --transition-speed: 0.8s;
    --font-main: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

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

html {
    scroll-behavior: smooth;
}

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

/* Layout Helpers */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 2rem;
    width: 100%;
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    padding: 1.5rem 0;
    background: transparent;
    transition: all 0.4s ease;
}

.navbar.scrolled {
    background: rgba(5, 5, 5, 0.9);
    backdrop-filter: blur(10px);
    padding: 1rem 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 2rem;
}

.nav-logo {
    font-weight: 900;
    font-size: 1.4rem;
    text-decoration: none;
    color: var(--text-primary);
    letter-spacing: 0.3em;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 2.5rem;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-secondary);
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.15em;
    transition: color 0.3s ease;
}

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

/* Hero Section */
.hero {
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 2rem;
    background: radial-gradient(circle at center, rgba(255,255,255,0.03) 0%, rgba(0,0,0,0) 70%);
}

.hero-title {
    font-size: clamp(3.5rem, 12vw, 10rem);
    font-weight: 900;
    line-height: 0.85;
    margin-bottom: 1rem;
    letter-spacing: -0.03em;
    text-transform: uppercase;
}

.hero-subtitle {
    font-size: clamp(1rem, 3vw, 1.8rem);
    color: var(--text-secondary);
    font-weight: 300;
    margin-bottom: 2rem;
}

.hero-motto {
    font-size: 0.9rem;
    letter-spacing: 0.3em;
    text-transform: uppercase;
    opacity: 0.5;
}

.scroll-indicator {
    position: absolute;
    bottom: 3rem;
    animation: bounce 2s infinite;
}

.indicator-text {
    font-size: 0.7rem;
    letter-spacing: 0.2em;
    opacity: 0.5;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% { transform: translateY(0); }
    40% { transform: translateY(-10px); }
    60% { transform: translateY(-5px); }
}

/* Content Sections */
.content-section {
    padding: 15vw 0;
    min-height: 100vh;
    display: flex;
    align-items: center;
}

.layout-split {
    display: flex;
    align-items: center;
    gap: 6rem;
}

.layout-split.reversed {
    flex-direction: row-reverse;
}

.text-content {
    flex: 1;
    z-index: 2;
}

.video-container {
    flex: 1.2;
    display: flex;
    justify-content: center;
    align-items: center;
}

.section-number {
    display: block;
    font-size: 0.8rem;
    color: var(--text-secondary);
    letter-spacing: 0.5em;
    margin-bottom: 2rem;
}

.main-title {
    font-size: clamp(2.5rem, 6vw, 5rem);
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 2.5rem;
    max-width: 800px;
}

.description {
    font-size: 1.1rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin-bottom: 3rem;
}

.tags {
    display: flex;
    flex-wrap: wrap;
    gap: 2rem;
    font-size: 0.8rem;
    font-weight: 700;
    letter-spacing: 0.1em;
}

.tags span {
    color: var(--text-secondary);
}

/* Video Frame Styling */
.video-frame {
    width: 100%;
    max-width: 1100px;
    aspect-ratio: 16 / 9;
    overflow: hidden;
    position: relative;
    border-radius: 2px;
    box-shadow: 0 40px 80px rgba(0,0,0,0.6);
    background: #000;
}

.video-frame video {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.video-overlay {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.2);
    border-radius: 2px;
}

.video-label {
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    font-size: clamp(5rem, 15vw, 18rem);
    font-weight: 900;
    letter-spacing: 0.1em;
    color: rgba(255, 255, 255, 0.1);
    pointer-events: none;
    text-transform: uppercase;
    white-space: nowrap;
}

/* Specific Layouts */
.layout-free {
    display: flex;
    align-items: center;
    justify-content: space-around;
    gap: 4rem;
    padding: 10vw 0;
}

.full-width-large .video-frame {
    max-width: 1300px;
    transform: scale(1.05);
}

/* Section 04 Special Styling */
.section-04 .sub-title {
    font-size: 1.8rem;
    font-weight: 300;
    margin-bottom: 1.5rem;
    display: block;
    opacity: 0.8;
}

/* Contacts */
.contact-section {
    background: #050505;
    padding-bottom: 15vh;
}

.contact-container {
    text-align: center;
    max-width: 1000px;
    margin: 0 auto;
}

.contact-link {
    font-size: clamp(2.5rem, 8vw, 6rem);
    font-weight: 900;
    color: var(--text-primary);
    text-decoration: none;
    letter-spacing: -0.02em;
    display: block;
    margin: 2rem 0;
    transition: all 0.4s ease;
}

.contact-link:hover {
    color: var(--text-secondary);
    transform: translateY(-5px);
}

.contact-socials {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    font-size: 1.1rem;
    color: var(--text-secondary);
}

.contact-socials a {
    text-decoration: none;
    color: inherit;
    transition: color 0.3s ease;
}

.contact-socials a:hover {
    color: var(--text-primary);
}

.copyright {
    padding: 4rem 0;
    text-align: center;
    font-size: 0.8rem;
    color: #222;
    letter-spacing: 0.2em;
}

/* Animations */
.reveal {
    opacity: 0;
    transform: translateY(40px);
    transition: all var(--transition-speed) cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}

.delay-1 { transition-delay: 0.2s; }
.delay-2 { transition-delay: 0.4s; }
.delay-3 { transition-delay: 0.6s; }

/* Mobile Responsive */
@media (max-width: 992px) {
    .layout-split, .layout-split.reversed, .layout-free {
        flex-direction: column !important;
        text-align: center;
        gap: 3rem;
    }
    
    .section-content {
        order: 1;
    }
    
    .video-container {
        order: 2;
        width: 100%;
    }
    
    .description {
        margin: 0 auto 2.5rem;
    }

    .nav-links {
        display: none;
    }

    .hero-title {
        font-size: 4rem;
    }

    .contact-link {
        font-size: 3.5rem;
    }
}

@media (prefers-reduced-motion: reduce) {
    .reveal {
        transition: opacity var(--transition-speed);
        transform: none;
    }
}