:root {
    --bg-primary: #0b0c0e;
    --bg-secondary: #131416;
    --text-primary: #ffffff;
    --text-secondary: #9ca3af;
    --accent: #6366f1;
    --accent-hover: #818cf8;
    --border: rgba(255, 255, 255, 0.08);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: 'Inter', sans-serif; background-color: var(--bg-primary); color: var(--text-primary); line-height: 1.6; }
.container { max-width: 1200px; margin: 0 auto; padding: 4rem 2rem; }

.header { position: fixed; top: 0; left: 0; right: 0; z-index: 100; background: rgba(11, 12, 14, 0.85); backdrop-filter: blur(16px); border-bottom: 1px solid var(--border); }
.header-content { max-width: 1200px; margin: 0 auto; padding: 1rem 2rem; display: flex; justify-content: space-between; align-items: center; }
.logo { font-weight: 700; font-size: 1.5rem; letter-spacing: -0.03em; }
.nav a { color: var(--text-secondary); text-decoration: none; margin-left: 2rem; transition: color 0.3s; }
.nav a:hover { color: var(--accent); }

.hero { min-height: 100vh; display: flex; align-items: center; justify-content: center; text-align: center; background-size: cover; position: relative; overflow: hidden; }
.hero::before { content: ''; position: absolute; inset: 0; background: radial-gradient(circle at center, rgba(99,102,241,0.15) 0%, transparent 60%); }
.hero-content { position: relative; z-index: 1; padding: 2rem; max-width: 800px; }
.hero h2 { font-size: clamp(2rem, 5vw, 3.5rem); margin-bottom: 1rem; letter-spacing: -0.04em; line-height: 1.2; }
.hero p { color: var(--text-secondary); font-size: 1.125rem; margin-bottom: 2rem; }

.btn { display: inline-block; padding: 0.875rem 1.5rem; border-radius: 8px; text-decoration: none; font-weight: 600; transition: all 0.3s; border: none; cursor: pointer; font-size: 1rem; }
.btn-primary { background: var(--accent); color: white; box-shadow: 0 4px 20px rgba(99,102,241,0.4); }
.btn-primary:hover { background: var(--accent-hover); transform: translateY(-2px); box-shadow: 0 6px 30px rgba(99,102,241,0.5); }

.section h3 { font-size: 2rem; margin-bottom: 2rem; letter-spacing: -0.03em; }
.section p { color: var(--text-secondary); max-width: 600px; }

.video-section { background: var(--bg-secondary); }
.video-section h3 { text-align: center; font-size: 2.5rem; margin-bottom: 3rem; letter-spacing: -0.04em; }

.video-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 2rem; max-width: 1200px; margin: 0 auto; padding: 0 2rem; }
.video-card { background: var(--bg-primary); border-radius: 16px; overflow: hidden; cursor: pointer; transition: transform 0.3s, box-shadow 0.3s; border: 1px solid var(--border); width: 100%; }
.video-card:hover { transform: translateY(-8px); box-shadow: 0 20px 40px rgba(0,0,0,0.3); border-color: rgba(99,102,241,0.3); }
.thumbnail { position: relative; width: 100%; padding-top: 56.25%; background: var(--bg-secondary); overflow: hidden; display: flex; align-items: center; justify-content: center; }
.thumbnail img { position: absolute; top: 0; left: 0; width: 100%; height: 100%; object-fit: cover; transition: transform 0.3s; }
.video-card:hover .thumbnail img { transform: scale(1.05); }
.play-icon { position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%); width: 64px; height: 64px; background: rgba(99,102,241,0.9); border-radius: 50%; display: flex; align-items: center; justify-content: center; color: white; font-size: 1.5rem; transition: transform 0.3s, background-color 0.3s; z-index: 1; }
.video-card:hover .play-icon { background: var(--accent); transform: translate(-50%, -50%) scale(1.1); }
.video-info { padding: 1.5rem; }
.video-info h4 { font-size: 1.125rem; margin-bottom: 0.5rem; }
.video-info p { color: var(--text-secondary); font-size: 0.875rem; }

.lightbox { position: fixed; top: 0; left: 0; width: 100%; height: 100%; z-index: 200; display: none; justify-content: center; align-items: center; }
.lightbox.active { display: flex; }
.lightbox-backdrop { position: fixed; inset: 0; background: rgba(0,0,0,0.9); z-index: -1; opacity: 0; transition: opacity 0.3s; }
.lightbox.active .lightbox-backdrop { opacity: 1; }
.lightbox-content { background: var(--bg-secondary); border-radius: 20px; overflow: hidden; max-width: 95vw; max-height: 90vh; display: flex; flex-direction: column; }
#lightbox-video { width: 100%; max-width: 960px; aspect-ratio: 16/9; object-fit: contain; background: black; border-radius: 20px; margin-bottom: auto; }
.lightbox-close { position: absolute; top: -48px; right: 0; background: none; border: none; color: white; font-size: 2.5rem; cursor: pointer; z-index: 10; transition: color 0.3s; }
.lightbox-close:hover { color: var(--accent); }
.lightbox-info { padding: 1.5rem 2rem; border-top: 1px solid var(--border); }
.lightbox-info h3 { font-size: 1.25rem; margin-bottom: 0.5rem; letter-spacing: -0.02em; }
.lightbox-info p { color: var(--text-secondary); max-width: none; }

.contact-form { display: flex; flex-direction: column; gap: 1rem; max-width: 600px; margin-top: 2rem; }
.contact-form input, .contact-form textarea { background: rgba(255,255,255,0.04); border: 1px solid var(--border); border-radius: 8px; padding: 0.875rem 1rem; color: white; font-family: inherit; font-size: 1rem; transition: border-color 0.3s; }
.contact-form input:focus, .contact-form textarea:focus { outline: none; border-color: var(--accent); }

.footer { text-align: center; padding: 4rem 2rem; color: var(--text-secondary); font-size: 0.875rem; border-top: 1px solid var(--border); margin-top: 4rem; }

@media (max-width: 768px) {
    .header-content { padding: 1rem; }
    .nav a { margin-left: 1rem; font-size: 0.875rem; }
    .video-grid { grid-template-columns: 1fr; padding: 0 1rem; }
    .lightbox-content { width: 96vw; border-radius: 12px; }
    #lightbox-video { border-radius: 12px; }
}