/* CSS Variables */
:root {
    --bg-primary: #000000;
    --bg-secondary: #0d0d0d;
    --bg-tertiary: #141414;
    --text-primary: #f5f5f5;
    --text-secondary: #86868b;
    --text-muted: #5a5a5a;
    --glass: rgba(255, 255, 255, 0.03);
    --glass-border: rgba(255, 255, 255, 0.08);
    --nav-height: 48px;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: "SF Pro Display", "Noto Serif SC", -apple-system, "PingFang SC", sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.7;
    overflow-x: hidden;
}

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

/* Typography */
.section-title {
    font-size: clamp(40px, 6vw, 72px);
    font-weight: 400;
    letter-spacing: -0.02em;
    margin-bottom: 8px;
}

.section-subtitle {
    font-size: clamp(18px, 2vw, 24px);
    font-weight: 300;
    color: var(--text-secondary);
    letter-spacing: 0.05em;
}

.feature-header {
    text-align: center;
    margin-bottom: 80px;
    padding-top: 120px;
}

/* Navbar */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--nav-height);
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    z-index: 1000;
    border-bottom: 1px solid var(--glass-border);
}

.nav-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    font-size: 18px;
    font-weight: 400;
    color: var(--text-primary);
    text-decoration: none;
    letter-spacing: 0.1em;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 48px;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 12px;
    transition: color 0.3s ease;
    letter-spacing: 0.05em;
}

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

.nav-admin {
    font-size: 12px;
    color: var(--text-muted);
    text-decoration: none;
    transition: color 0.3s ease;
}

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

/* Hero */
.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    position: relative;
    padding-top: var(--nav-height);
    text-align: center;
}

.hero-bg {
    position: absolute;
    inset: 0;
    background: 
        radial-gradient(ellipse 100% 60% at 50% 100%, rgba(40, 40, 40, 0.2) 0%, transparent 60%),
        radial-gradient(ellipse 80% 40% at 50% 0%, rgba(30, 30, 30, 0.15) 0%, transparent 50%);
    z-index: -1;
}

.hero-content {
    max-width: 800px;
    padding: 40px 24px;
}

.hero-title {
    font-size: clamp(56px, 10vw, 120px);
    font-weight: 300;
    letter-spacing: -0.03em;
    line-height: 1.1;
    margin-bottom: 24px;
    background: linear-gradient(180deg, var(--text-primary) 0%, #888 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: fadeInUp 1.2s ease-out;
}

.hero-subtitle {
    font-size: clamp(20px, 3vw, 32px);
    font-weight: 300;
    color: var(--text-secondary);
    letter-spacing: 0.15em;
    margin-bottom: 40px;
    animation: fadeInUp 1.2s ease-out 0.2s both;
}

.hero-desc {
    font-size: clamp(14px, 1.5vw, 18px);
    font-weight: 300;
    color: var(--text-muted);
    line-height: 2;
    max-width: 500px;
    margin: 0 auto;
    animation: fadeInUp 1.2s ease-out 0.4s both;
}

/* Feature Sections */
.feature-section {
    padding: 0 0 120px;
    background: var(--bg-primary);
}

.feature-section.dark-bg {
    background: var(--bg-secondary);
}

/* Image Grids */
.image-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
    margin-bottom: 80px;
}

.image-grid.three-col {
    grid-template-columns: repeat(3, 1fr);
}

.image-grid.four {
    grid-template-columns: repeat(4, 1fr);
}

.image-block {
    position: relative;
    overflow: hidden;
    border-radius: 4px;
    background: var(--bg-tertiary);
}

.image-block.large {
    grid-column: span 2;
    grid-row: span 2;
}

.image-block img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.image-block:hover img {
    transform: scale(1.03);
}

.image-label {
    position: absolute;
    bottom: 24px;
    left: 24px;
    font-size: 14px;
    color: var(--text-primary);
    letter-spacing: 0.1em;
    font-weight: 300;
}

/* Image Showcase */
.image-showcase {
    display: flex;
    flex-direction: column;
    gap: 80px;
}

.showcase-item {
    text-align: center;
}

.showcase-item img {
    width: 100%;
    max-height: 80vh;
    object-fit: cover;
    border-radius: 4px;
    margin-bottom: 24px;
}

.showcase-caption p {
    font-size: clamp(16px, 2vw, 20px);
    color: var(--text-secondary);
    font-style: italic;
    font-weight: 300;
}

/* Text Block */
.text-block {
    max-width: 600px;
    margin: 0 auto;
    text-align: center;
    padding: 40px 0;
}

.text-block p {
    font-size: clamp(16px, 1.8vw, 20px);
    color: var(--text-secondary);
    line-height: 2.2;
    font-weight: 300;
}

/* Quote Block */
.quote-block {
    max-width: 800px;
    margin: 0 auto 100px;
    text-align: center;
}

.quote-block blockquote {
    font-size: clamp(20px, 3vw, 36px);
    font-weight: 300;
    line-height: 2;
    color: var(--text-primary);
    font-style: italic;
}

/* Footer */
.footer {
    padding: 100px 0 60px;
    background: var(--bg-primary);
    border-top: 1px solid var(--glass-border);
    text-align: center;
}

.footer-text {
    font-size: clamp(18px, 2.5vw, 28px);
    font-weight: 300;
    color: var(--text-muted);
    line-height: 2;
    margin-bottom: 40px;
    letter-spacing: 0.1em;
}

.footer-links a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 12px;
    transition: color 0.3s ease;
}

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

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(40px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.fade-in {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Responsive */
@media (max-width: 1024px) {
    .image-grid {
        grid-template-columns: 1fr;
    }
    
    .image-block.large {
        grid-column: span 1;
        grid-row: span 1;
    }
    
    .image-grid.three-col {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .feature-header {
        padding-top: 80px;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    
    .hero-content {
        padding: 20px;
    }
    
    .image-grid.three-col {
        grid-template-columns: 1fr;
    }
    
    .feature-header {
        margin-bottom: 60px;
    }
    
    .image-showcase {
        gap: 60px;
    }
}