:root {
  color-scheme: dark;
  --bg: #0d1117; --card: #161b22; --text: #e6edf3;
  --muted: #8b949e; --accent: #f97316; --border: #30363d;
}
* { box-sizing: border-box; }
body { margin: 0; font: 16px/1.55 system-ui, -apple-system, "Segoe UI", sans-serif; background: var(--bg); color: var(--text); }
main { max-width: 760px; margin: 0 auto; padding: 32px 20px 80px; }
header h1 { margin: 0; font-size: 28px; }
header .lede { color: var(--muted); margin-top: 8px; }
fieldset { background: var(--card); border: 1px solid var(--border); border-radius: 12px; padding: 16px; margin: 14px 0; }
legend { padding: 0 8px; font-weight: 600; }
.grid { display: flex; flex-wrap: wrap; gap: 8px; }
.grid label { flex: 1 1 130px; display: flex; gap: 8px; align-items: center; padding: 10px 12px;
  border: 1px solid var(--border); border-radius: 8px; cursor: pointer; }
.grid label.checked { border-color: var(--accent); background: rgba(249, 115, 22, 0.12); }
.row { display: flex; flex-wrap: wrap; gap: 8px; }
.row label { display: flex; gap: 8px; align-items: center; padding: 8px 14px;
  border: 1px solid var(--border); border-radius: 8px; cursor: pointer; }
.row label.checked { border-color: var(--accent); background: rgba(249, 115, 22, 0.12); }
footer { margin-top: 22px; display: flex; flex-direction: column; gap: 12px; }
button { background: var(--accent); border: 0; border-radius: 10px; padding: 12px 18px;
  color: #1a0a02; font-weight: 700; font-size: 16px; cursor: pointer; width: fit-content; }
.hint { color: var(--muted); margin: 0; display: flex; flex-direction: column; gap: 6px; }
.hint a { color: var(--accent); }
.mono { font-family: ui-monospace, Consolas, monospace; font-size: 12.5px; word-break: break-all; }