:root{--bg:#fff;--fg:#1b1b1b;--muted:#5c5c5c;--line:#c9c9c9;--accent:#7a3b12;--accent-fg:#fff;--err:#b00020}
@media (prefers-color-scheme:dark){:root{--bg:#161616;--fg:#f0f0f0;--muted:#a8a8a8;--line:#444;--accent:#e0a070;--accent-fg:#161616;--err:#ff8a80}}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--fg);font:16px/1.45 system-ui,-apple-system,Segoe UI,Roboto,sans-serif}
main{max-width:560px;margin:0 auto;padding:16px}
h1{font-size:1.4rem;margin:0 0 4px}h2{font-size:1.2rem}
.lead,.note,.ship-to{color:var(--muted)}.ship-to{font-size:.85rem;margin-top:20px}
label{display:block;font-size:.9rem;margin:10px 0}
input{display:block;width:100%;margin-top:4px;padding:10px;font:inherit;color:var(--fg);background:var(--bg);border:1px solid var(--line);border-radius:6px}
input:focus-visible,button:focus-visible,a:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
input[aria-invalid=true]{border-color:var(--err)}
.row{display:grid;grid-template-columns:1fr 1fr;gap:0 12px}.row.three{grid-template-columns:2fr 1fr 1fr}
@media (max-width:480px){.row,.row.three{grid-template-columns:1fr}}
.hp{position:absolute;left:-9999px;width:1px;height:1px}
button,.btn{display:inline-block;padding:11px 18px;font:inherit;font-weight:600;color:var(--accent-fg);background:var(--accent);border:0;border-radius:6px;text-decoration:none;cursor:pointer}
.btn.secondary{background:transparent;color:var(--accent);border:1px solid var(--accent)}
button[disabled]{opacity:.6;cursor:wait}
.error{color:var(--err);margin:8px 0}