:root{--bg:#EDF0F5;--surface:#FFFFFF;--ink:#141A26;--muted:#5B6578;--line:#D5DBE6;--on-ink:#FFFFFF;--good:#14804A;--bad:#C2312D;color-scheme:light}@media (prefers-color-scheme:dark){:root{--bg:#0F121A;--surface:#171B26;--ink:#EDF0F7;--muted:#9AA4B8;--line:#272D3C;--on-ink:#0F121A;--good:#3DD68C;--bad:#FF7B76;color-scheme:dark}}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font:15px/1.5 system-ui,-apple-system,Segoe UI,sans-serif}.page{max-width:560px;margin:0 auto;padding:32px max(16px,env(safe-area-inset-right)) 56px max(16px,env(safe-area-inset-left));display:flex;flex-direction:column;gap:20px}h1{font-size:30px;letter-spacing:-.02em}h1,p{margin:0}p{color:var(--muted)}.card{background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:18px 16px;display:flex;flex-direction:column;gap:12px}.card h2{font-size:16px;margin:0}button{font:inherit;font-weight:600;background:var(--ink);color:var(--on-ink);border:0;border-radius:10px;padding:10px 16px;cursor:pointer}button:disabled{opacity:.5;cursor:default}button.quiet{background:transparent;color:var(--ink);border:1px solid var(--line)}input[type=text]{font:inherit;padding:9px 12px;border-radius:10px;border:1px solid var(--line);background:var(--bg);color:var(--ink);width:100%}:focus-visible{outline:2px solid var(--ink);outline-offset:2px}code{font-family:ui-monospace,Menlo,monospace;font-size:13px;overflow-wrap:anywhere}.row{display:flex;gap:10px;flex-wrap:wrap}.ok{color:var(--good)}.err{color:var(--bad)}a{color:var(--ink);font-weight:600}