:root {
  color-scheme: light dark;
  --bg: #ffffff;
  --fg: #1a1a1a;
  --muted: #4a4a4a;
  --line: #767676;
  --accent: #0b5cad;
  --accent-fg: #ffffff;
  --warn-bg: #fff4e5;
  --offer-bg: #eef4fb;
  --error: #a40000;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #121212;
    --fg: #f0f0f0;
    --muted: #c4c4c4;
    --line: #8a8a8a;
    --accent: #7db8ff;
    --accent-fg: #0a0a0a;
    --warn-bg: #332a1a;
    --offer-bg: #1b2736;
    --error: #ff9b9b;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0 auto;
  max-width: 40rem;
  padding: 1rem;
  background: var(--bg);
  color: var(--fg);
  font: 1rem/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
h1 { font-size: 1.6rem; line-height: 1.2; }
h2 { font-size: 1.2rem; margin-top: 2rem; }
.hint { color: var(--muted); font-size: 0.9rem; margin: 0.25rem 0; }
.field { margin: 0 0 1rem; }
label { display: block; font-weight: 600; margin-bottom: 0.25rem; }
input[type="text"], input[type="date"], input[type="email"], select {
  width: 100%;
  min-height: 2.75rem;
  padding: 0.5rem;
  font: inherit;
  color: var(--fg);
  background: var(--bg);
  border: 2px solid var(--line);
  border-radius: 6px;
}
button {
  min-height: 2.75rem;
  min-width: 2.75rem;
  padding: 0.5rem 1rem;
  font: inherit;
  font-weight: 600;
  color: var(--fg);
  background: var(--bg);
  border: 2px solid var(--accent);
  border-radius: 6px;
  cursor: pointer;
}
button.primary { background: var(--accent); color: var(--accent-fg); }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }
.switch { border: 0; padding: 0; margin: 0; display: flex; gap: 1rem; }
.switch label { display: flex; align-items: center; gap: 0.5rem; min-height: 2.75rem; margin: 0; }
.switch input { width: 1.5rem; height: 1.5rem; }
.errors { border: 2px solid var(--error); color: var(--error); padding: 0.5rem 1rem; margin-bottom: 1rem; border-radius: 6px; }
.errors ul { margin: 0; padding-left: 1.25rem; }
.offer { background: var(--offer-bg); border: 2px solid var(--accent); border-radius: 8px; padding: 0 1rem 1rem; margin-top: 1.5rem; }
.buy-row { display: flex; flex-wrap: wrap; gap: 0.75rem; margin: 0.75rem 0; }
.log { list-style: none; padding: 0; margin: 0; }
.log li { border: 1px solid var(--line); border-radius: 6px; padding: 0.75rem; margin-bottom: 0.75rem; }
.log .meta { color: var(--muted); font-size: 0.9rem; }
.log button { margin-top: 0.5rem; }
#summary { border-left: 4px solid var(--accent); padding: 0.25rem 1rem; }
#summary .over { background: var(--warn-bg); padding: 0.25rem 0.5rem; }
footer { margin-top: 3rem; padding-top: 1rem; border-top: 1px solid var(--line); color: var(--muted); font-size: 0.9rem; }
.skip { position: absolute; left: -999px; }
.skip:focus { left: 0.5rem; top: 0.5rem; background: var(--bg); padding: 0.5rem; z-index: 10; }
.visually-hidden { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
[hidden] { display: none !important; }