*{box-sizing:border-box}html,body{margin:0;min-height:100%}
body{font:16px/1.5 system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;color:#14213d;display:flex;align-items:center;
justify-content:center;padding:24px;min-height:100vh;
background:radial-gradient(1200px 600px at 10% 10%,#bcd4ff 0,transparent 60%),radial-gradient(900px 500px at 90% 90%,#c7f0ff 0,transparent 60%),linear-gradient(135deg,#eef3ff,#f7fbff)}
.kaart{width:100%;max-width:440px;padding:32px;border-radius:24px;background:rgba(255,255,255,.55);
border:1px solid rgba(255,255,255,.7);box-shadow:0 20px 60px rgba(29,78,216,.15);backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px)}
.merk{display:flex;align-items:center;gap:10px;font-weight:600;color:#1e3a8a;margin-bottom:20px}
.logo{display:inline-grid;place-items:center;width:38px;height:38px;border-radius:12px;background:#0b1f6b;color:#fff;font-style:italic;font-weight:800}
h1{font-size:24px;margin:0 0 12px}p{margin:0 0 16px}
.knop{display:inline-block;width:100%;text-align:center;border:0;cursor:pointer;font:inherit;font-weight:600;padding:13px 18px;
border-radius:14px;background:#1d4ed8;color:#fff;text-decoration:none;box-shadow:0 8px 20px rgba(29,78,216,.25)}
.knop:hover{background:#1e40af}.knop.stil{background:rgba(255,255,255,.7);color:#14213d;box-shadow:none;border:1px solid #c7d2fe;margin-top:10px}
.melding{padding:10px 14px;border-radius:12px;background:rgba(219,234,254,.8)}
.fout{padding:10px 14px;border-radius:12px;background:rgba(254,226,226,.9);color:#991b1b}
.klein{font-size:14px;color:#5b6475}a{color:#1d4ed8}
.code label{display:block;font-size:14px;margin-bottom:6px}.code input{width:100%;font-size:22px;letter-spacing:3px;padding:10px 14px;
border-radius:12px;border:1px solid #c7d2fe;background:rgba(255,255,255,.8);margin-bottom:12px}
.details{display:grid;grid-template-columns:auto 1fr;gap:6px 14px;margin:0 0 20px}.details dt{color:#5b6475}.details dd{margin:0}