:root {
  --bg: #f4f6f3; --card: #ffffff; --fg: #1b2420; --muted: #5b6962; --line: #d6ddd8;
  --accent: #1f6f5c; --accent-fg: #ffffff; --danger: #b3261e; --radius: 14px;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #111613; --card: #1a211d; --fg: #e8ede9; --muted: #98a79f; --line: #2c3731;
    --accent: #4fb89c; --accent-fg: #06231b; --danger: #ff8a80;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0; background: var(--bg); color: var(--fg);
  font: 16px/1.45 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
main { max-width: 560px; margin: 0 auto; padding: 16px 16px 56px; }
header { padding: 8px 0 4px; }
h1 { font-size: 1.5rem; margin: 0 0 4px; }
h2 { font-size: 1.2rem; margin: 0 0 8px; }
.sub, .hint { color: var(--muted); font-size: .92rem; margin: 0; }
.hint { margin: 8px 0 12px; }

.card {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 16px; margin: 14px 0;
}
label { display: block; font-weight: 600; font-size: .92rem; margin: 14px 0 6px; }
label:first-child { margin-top: 0; }

input, select, textarea {
  width: 100%; min-height: 48px; padding: 10px 12px; font: inherit; color: inherit;
  background: var(--bg); border: 1px solid var(--line); border-radius: 10px;
}
textarea { resize: vertical; }
input:focus-visible, select:focus-visible, textarea:focus-visible, button:focus-visible {
  outline: 3px solid color-mix(in srgb, var(--accent) 55%, transparent); outline-offset: 1px;
}

.row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }

.stepper { display: grid; grid-template-columns: 56px 1fr 56px; gap: 8px; }
.stepper input { text-align: center; font-size: 1.25rem; font-weight: 600; }
.stepper button {
  min-height: 48px; font-size: 1.5rem; line-height: 1; color: var(--fg);
  background: var(--bg); border: 1px solid var(--line); border-radius: 10px; cursor: pointer;
}

button.primary {
  width: 100%; min-height: 52px; margin-top: 8px; font: inherit; font-weight: 700;
  color: var(--accent-fg); background: var(--accent); border: 0; border-radius: 12px; cursor: pointer;
}
button.primary:disabled { opacity: .6; cursor: progress; }
button.ghost {
  width: 100%; min-height: 44px; font: inherit; color: var(--fg);
  background: transparent; border: 1px dashed var(--line); border-radius: 10px; cursor: pointer;
}
.error { color: var(--danger); font-weight: 600; min-height: 1.2em; margin: 8px 0 0; }
[hidden] { display: none !important; }