:root{--paper:#eef1f1;--surface:#fff;--ink:#1c2530;--ink-soft:#55616c;--line:#dbe0e2;--copper:#b5652d;--copper-strong:#8f4e22;--copper-tint:#f3e4d6;--danger-tint:#f6deda;--danger-ink:#8a3329}*{box-sizing:border-box}body{background:var(--paper);color:var(--ink);margin:0;font-family:system-ui,-apple-system,Segoe UI,sans-serif;line-height:1.5}a{color:var(--copper-strong)}input{border:1px solid var(--line);background:var(--surface);font:inherit;color:var(--ink);border-radius:8px;padding:10px 12px}button{font:inherit;cursor:pointer;background:var(--copper);color:#fff;border:none;border-radius:8px;padding:11px 16px;font-weight:600}button:hover{background:var(--copper-strong)}button:disabled{opacity:.5;cursor:default}