:root{--brand:#0b6e4f;--text:#1b1b1b;--muted:#5c5c5c;--surface:#fff;--border:#c9c9c9;color:var(--text);background:var(--surface);font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif;font-size:18px;line-height:1.45}@media (prefers-color-scheme:dark){:root{--brand:#4cc79b;--text:#f0f0f0;--muted:#b5b5b5;--surface:#161616;--border:#444}}body{background:var(--surface);margin:0}main{max-width:40rem;margin:0 auto;padding:16px}header{border-bottom:1px solid var(--border);flex-wrap:wrap;justify-content:space-between;align-items:center;gap:8px;padding:8px 16px;display:flex}header nav{align-items:center;gap:12px;display:flex}.brand{color:var(--brand);margin:0;font-weight:700}a{color:var(--brand)}button,input{font:inherit;min-height:48px}button{border:1px solid var(--brand);background:var(--surface);color:var(--brand);cursor:pointer;border-radius:8px;padding:8px 16px}button[type=submit],button:disabled{background:var(--brand);color:var(--surface)}button:disabled{opacity:.5;cursor:not-allowed}input:not([type=radio]){box-sizing:border-box;border:1px solid var(--border);background:var(--surface);width:100%;color:var(--text);border-radius:8px;margin:4px 0 12px;padding:8px 12px;display:block}input[type=radio]{vertical-align:middle;width:24px;height:24px;min-height:0}fieldset label{align-items:center;gap:8px;min-height:48px;margin-right:24px;display:inline-flex}fieldset{border:1px solid var(--border);border-radius:8px}button.fault{text-align:left;width:100%;min-height:56px;margin:8px 0;display:block}small{color:var(--muted);font-size:.8rem;display:block}[role=alert]{color:#b3261e}.link{word-break:break-all}ol li,ul li{margin:8px 0}