:root {
  --bg: #ffffff;
  --fg: #1c1c1e;
  --muted: #8a8a8e;
  --accent: #2ea6ff;
  --border: #d9d9de;
  --chip: #f0f0f3;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #17171a;
    --fg: #f2f2f7;
    --muted: #8a8a8e;
    --accent: #2ea6ff;
    --border: #2c2c2e;
    --chip: #232327;
  }
}
* { box-sizing: border-box; }
html, body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  font-size: 15px;
}
#app {
  max-width: 520px;
  margin: 0 auto;
  padding: 16px 16px calc(96px + env(safe-area-inset-bottom));
}
h1 { font-size: 19px; margin: 6px 0 14px; }
.f { display: block; margin: 0 0 16px; border: 0; padding: 0; }
.f > span, .f > legend { display: block; font-weight: 600; margin-bottom: 6px; }
input[type="text"], select, input[type="number"] {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--bg);
  color: var(--fg);
  font-size: 15px;
}
.chips { display: flex; flex-wrap: wrap; gap: 6px; }
.chip {
  border: 1px solid var(--border);
  background: var(--chip);
  color: var(--fg);
  border-radius: 999px;
  padding: 6px 12px;
  font-size: 14px;
  cursor: pointer;
  user-select: none;
}
.chip.on { background: var(--accent); border-color: var(--accent); color: #fff; }
.range {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  margin-bottom: 12px;
}
.range > label { font-size: 13px; color: var(--muted); display: block; }
.range > label input { margin-top: 4px; }
fieldset.f label { display: block; padding: 4px 0; }
.skip { font-size: 13px; color: var(--muted); }
.err { color: #ff3b30; font-size: 14px; margin: 4px 0 12px; }