:root{color-scheme:light dark;--bg:#fbfbfd;--fg:#1d1d1f;--muted:#6e6e73;--line:#d2d2d7;--accent:#0a63d6;--card:#fff}
@media (prefers-color-scheme:dark){:root{--bg:#161618;--fg:#f5f5f7;--muted:#a1a1a6;--line:#38383c;--accent:#4c9bff;--card:#1f1f22}}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--fg);font:16px/1.55 system-ui,-apple-system,sans-serif}
.wrap{max-width:44rem;margin:0 auto;padding:0 1rem}
.bar{display:flex;justify-content:space-between;align-items:center;padding-top:1rem;padding-bottom:1rem}
.bar nav a{margin-left:1.25rem}
.brand{font-weight:650;color:var(--fg);text-decoration:none}
a{color:var(--accent)}
main{padding:2rem 0 3rem}
h1{font-size:2rem;line-height:1.2;margin:0 0 .5rem}
h2{font-size:1.25rem;margin:2rem 0 .5rem}
.lead{font-size:1.15rem;color:var(--muted)}
.card{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:1.25rem;margin:1.5rem 0}
.price{font-size:1.75rem;font-weight:650}
.fine{color:var(--muted);font-size:.875rem}
button,.button{display:inline-block;background:var(--accent);color:#fff;border:0;border-radius:8px;padding:.7rem 1.25rem;font:inherit;font-weight:600;cursor:pointer;text-decoration:none}
button:disabled{opacity:.6;cursor:default}
textarea,input{width:100%;font:14px ui-monospace,monospace;padding:.5rem;background:var(--card);color:var(--fg);border:1px solid var(--line);border-radius:6px}
.foot{border-top:1px solid var(--line);color:var(--muted);font-size:.875rem;padding:1.5rem 0}
.foot a{margin-right:1rem}
.testbar{background:#ffd60a;color:#1d1d1f;text-align:center;padding:.4rem 1rem;font-size:.9rem}.testbar a{color:#1d1d1f;font-weight:600}