:root{color-scheme:light;font-family:Space Grotesk,Avenir Next,Segoe UI,sans-serif;--bg: radial-gradient(circle at top right, #f5f8ff, #e6f0e8 55%, #f8efe5);--card: #ffffffdd;--text: #111827;--muted: #45556c;--accent: #1d5d4f;--border: #c7d2dd}*{box-sizing:border-box}body{margin:0;min-height:100vh;background:var(--bg);color:var(--text)}.shell{min-height:100vh;display:grid;place-items:center;padding:24px}.panel{width:min(760px,100%);display:grid;gap:14px}h1{margin:0;font-size:2.2rem}.sub{margin:0;color:var(--muted)}.card{background:var(--card);border:1px solid var(--border);border-radius:14px;padding:16px;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px)}button{-webkit-appearance:none;-moz-appearance:none;appearance:none;border:none;background:var(--accent);color:#fff;border-radius:10px;padding:10px 14px;font-weight:600;cursor:pointer;margin-right:8px}input{width:100%;border:1px solid var(--border);border-radius:10px;padding:10px;margin-top:4px;margin-bottom:10px}.hidden{display:none}@media(max-width:640px){h1{font-size:1.8rem}}