:root {
    --primary: #007bff;
    --accent: #00d4ff;
    --dark: #0a0e17;
    --card-bg: #161c2d;
    --text: #ffffff;
    --text-muted: #a0aec0;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: 'Inter', sans-serif; background: #0f172a; color: var(--text); line-height: 1.6; }

/* Nav */
nav { display: flex; justify-content: space-between; align-items: center; padding: 0.5rem 8%; background: white; position: sticky; top: 0; z-index: 100; }
.logo-box { background: var(--primary); padding: 2px 2px; border-radius: 6px; font-weight: 800; font-size: 1.4rem; margin-right: 10px; }
.logo-container { display: flex; align-items: center; }
.logo-text { font-weight: 700; font-size: 1.2rem; }
.logo-text span { display: block; font-size: 0.7rem; color: var(--accent); text-transform: uppercase; }
.nav-menu { display: flex; list-style: none; gap: 2rem; }
.nav-menu a { text-decoration: none; color: rgba(0,0,0,0.7); font-weight: 500; transition: 0.3s; }
.nav-menu a:hover { color: var(--accent); }

/* Hero */
.hero { height: 90vh; background: linear-gradient(rgba(0,0,0,0.7), rgba(0,0,0,0.7)), url('https://images.unsplash.com/photo-1550751827-4bd374c3f58b?auto=format&fit=crop&q=80'); background-size: cover; display: flex; align-items: center; justify-content: center; text-align: center; }
.highlight { color: var(--accent); }
.hero h1 { font-size: 3.5rem; margin-bottom: 1rem; }
.hero p { font-size: 1.2rem; max-width: 800px; color: var(--text-muted); margin-bottom: 2rem; }

/* Layout */
.section { padding: 80px 8%; }
.container { max-width: 1200px; margin: 0 auto; }
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 30px; }
.course-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 25px; }

/* Cards */
.info-card, .course-card { background: var(--card-bg); padding: 40px; border-radius: 15px; border: 1px solid rgba(255,255,255,0.1); transition: 0.3s; }
.course-card:hover { transform: translateY(-10px); border-color: var(--accent); }
.icon { font-size: 2.5rem; display: block; margin-bottom: 15px; }
h3 { margin-bottom: 15px; color: var(--accent); }

/* Buttons */
.btn-primary { background: var(--primary); color: white; padding: 12px 30px; border-radius: 8px; text-decoration: none; font-weight: 600; }
.btn-secondary { border: 2px solid white; color: white; padding: 10px 28px; border-radius: 8px; text-decoration: none; margin-left: 15px; }

/* Footer */
footer { background: var(--dark); padding: 60px 8% 20px; border-top: 1px solid #1e293b; }
.footer-content { display: flex; justify-content: space-between; margin-bottom: 40px; }
.copyright { text-align: center; font-size: 0.8rem; color: var(--text-muted); }