:root{--bg1:#0ea5a3;--bg2:#7c3aed;--card-bg:rgba(255,255,255,0.06);--glass-shadow:0 10px 30px rgba(0,0,0,0.2)}html,body{height:100%}body{margin:0;font-family:Inter,system-ui,-apple-system,'Segoe UI',Roboto,'Helvetica Neue',Arial,system-ui;background:linear-gradient(135deg,var(--bg1),var(--bg2));color:#fff;display:flex;align-items:center;justify-content:center}nav.topnav{position:fixed;top:18px;left:50%;transform:translateX(-50%);display:flex;gap:14px;background:transparent;padding:6px 12px;border-radius:999px}nav.topnav a{color:rgba(255,255,255,0.95);text-decoration:none;padding:6px 10px;border-radius:8px;font-weight:600}nav.topnav a:hover{background:rgba(255,255,255,0.06)}main{padding:48px;width:100%;max-width:980px} .card{max-width:680px;margin:80px auto;padding:48px;border-radius:12px;background:var(--card-bg);box-shadow:var(--glass-shadow);text-align:center}h1{font-size:3rem;margin:0 0 0.5rem}p{margin:0 0 1rem;opacity:0.95}a.btn{display:inline-block;padding:0.6rem 1rem;background:#fff;color:#111;border-radius:8px;text-decoration:none;font-weight:700}footer{margin-top:1.25rem;opacity:0.9;font-size:0.9rem}