/* Сброс и базовые стили */
* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif; line-height: 1.6; color: #333; background: #f9f9f9; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }

/* Header */
header { background: #003580; color: white; padding: 1rem 0; position: sticky; top: 0; z-index: 100; }
nav { display: flex; justify-content: space-between; align-items: center; }
.logo { font-size: 1.5rem; font-weight: bold; }
.nav-links { display: flex; list-style: none; gap: 2rem; }
.nav-links a { color: white; text-decoration: none; transition: opacity 0.3s; }
.nav-links a:hover { opacity: 0.8; }

/* Hero */
.hero { background: linear-gradient(rgba(0,53,128,0.8), rgba(0,53,128,0.8)), url('/assets/img/hero-bg.jpg'); background-size: cover; background-position: center; color: white; padding: 120px 0; text-align: center; }
.hero h1 { font-size: 3rem; margin-bottom: 1rem; }
.hero p { font-size: 1.25rem; margin-bottom: 2rem; opacity: 0.9; }
.btn { display: inline-block; background: #00a699; color: white; padding: 12px 30px; text-decoration: none; border-radius: 4px; font-weight: 500; transition: background 0.3s; }
.btn:hover { background: #008c82; }

/* Main */
main { padding: 60px 0; }
h2 { text-align: center; margin-bottom: 40px; color: #003580; }

/* Features */
.features { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 30px; margin-bottom: 60px; }
.feature { background: white; padding: 30px; border-radius: 8px; box-shadow: 0 2px 10px rgba(0,0,0,0.1); text-align: center; }
.feature h3 { color: #003580; margin-bottom: 1rem; }

/* Video */
.video-section { margin-top: 60px; }
.video-grid { display: grid; gap: 20px; }
.video-grid iframe { width: 100%; height: 400px; border-radius: 8px; }

/* Footer */
footer { background: #003580; color: white; text-align: center; padding: 2rem 0; margin-top: 60px; }
footer p { opacity: 0.9; }

/* Responsive */
@media (max-width: 768px) {
    .nav-links { display: none; }
    .hero h1 { font-size: 2rem; }
    .video-grid iframe { height: 250px; }
}