/* Reset & base */
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial,sans-serif;line-height:1.6;color:#0f172a;background:#f8fafc}
a{color:#1d4ed8;text-decoration:none}
a:hover{text-decoration:underline}
img{max-width:100%;height:auto;display:block}
.container{max-width:1100px;margin:0 auto;padding:24px}
/* Header */
.site-header{position:sticky;top:0;z-index:50;background:#ffffff;border-bottom:1px solid rgba(2,6,23,.08);box-shadow:0 4px 14px rgba(2,6,23,.04)}
.header-wrap{display:flex;align-items:center;justify-content:space-between;gap:16px}
.brand{display:flex;gap:12px;align-items:center}
.logo{width:40px;height:40px;border-radius:10px;background:#1d4ed8;color:#fff;display:grid;place-items:center;font-weight:800}
.brand-text .site-title{font-size:18px;font-weight:800;color:#0f172a}
.brand-text .site-subtitle{font-size:12px;color:#475569}
.main-nav a{margin-left:14px;padding:10px 12px;border-radius:10px}
.main-nav a.active,.main-nav a:hover{background:#eef2ff}
/* Hero */
.hero{display:grid;grid-template-columns:1.4fr .9fr;gap:28px;align-items:center;margin-top:8px}
.hero h1{font-size:34px;line-height:1.2;margin-bottom:10px}
.hero p.lead{color:#334155;margin-bottom:18px}
.hero .cta{display:flex;gap:12px;flex-wrap:wrap}
.btn{display:inline-block;background:#1d4ed8;color:#fff;padding:12px 16px;border-radius:12px;font-weight:600}
.btn.ghost{background:#fff;color:#1d4ed8;border:1px solid #c7d2fe}
.badge{display:inline-block;font-size:12px;background:#fef3c7;color:#b45309;border:1px solid #fde68a;padding:4px 8px;border-radius:999px}
.card{background:#ffffff;border:1px solid rgba(2,6,23,.08);border-radius:16px;box-shadow:0 10px 30px rgba(2,6,23,.06);padding:18px}
.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.section{margin:26px 0}
.section h2{font-size:22px;margin-bottom:12px}
ul.check{list-style:none}
ul.check li{padding-left:28px;position:relative;margin-bottom:8px}
ul.check li:before{content:'✓';position:absolute;left:0;top:0.2rem;background:#22c55e;color:#fff;border-radius:6px;font-size:12px;line-height:1;padding:6px}
/* Footer */
.site-footer{margin-top:28px;background:#0f172a;color:#cbd5e1}
.site-footer a{color:#93c5fd}
.footer-wrap{display:flex;align-items:center;justify-content:space-between;gap:12px}
/* Live clock */
.live-clock{position:fixed;right:20px;bottom:18px;z-index:60;background:#fff;border:1px solid rgba(2,6,23,.1);border-radius:12px;box-shadow:0 8px 24px rgba(2,6,23,.1);padding:10px 12px;width:210px}
.live-clock .row{display:flex;align-items:baseline;justify-content:space-between}
.live-clock .time{font-weight:800;font-size:24px;color:#1d4ed8}
.live-clock .date{font-size:13px;color:#475569;margin-top:4px}
/* Course cards */
.course{display:flex;gap:12px;align-items:flex-start}
.course .icon{width:42px;height:42px;border-radius:10px;display:grid;place-items:center;background:#eef2ff;color:#1d4ed8;font-weight:800}
.course h3{margin-bottom:6px}
.small{font-size:13px;color:#475569}
/* Form */
form label{font-weight:600;color:#0f172a}
form input,form select,form textarea{width:100%;padding:12px;border:1px solid #e2e8f0;border-radius:10px}
form .row{display:grid;grid-template-columns:1fr 1fr;gap:14px}
form .actions{display:flex;gap:10px;margin-top:8px}
/* Responsive */
@media (max-width: 900px){
  .hero{grid-template-columns:1fr}
  .grid{grid-template-columns:1fr 1fr}
  .grid-4{grid-template-columns:1fr 1fr}
}
@media (max-width: 600px){
  .grid,.grid-2,.grid-4{grid-template-columns:1fr}
  .live-clock{width:180px;right:12px}
}