:root {
  color-scheme: light dark;
  --bg: #ffffff;
  --fg: #1b1b1b;
  --muted: #4a4a4a;
  --accent: #0b5cad;
  --accent-fg: #ffffff;
  --border: #767676;
  --card: #f4f6f8;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #121212;
    --fg: #eeeeee;
    --muted: #c8c8c8;
    --accent: #8ab4f8;
    --accent-fg: #0a1a2f;
    --border: #9a9a9a;
    --card: #1e1e1e;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  font-size: 1rem;
  line-height: 1.5;
}

main, header, footer {
  max-width: 40rem;
  margin: 0 auto;
  padding: 1rem;
}

h1 { font-size: 1.6rem; line-height: 1.2; margin: 1rem 0 0.5rem; }
h2 { font-size: 1.25rem; margin: 1.5rem 0 0.75rem; }
h3 { font-size: 1.1rem; margin: 1rem 0 0.5rem; }

.lede, .hint, footer p { color: var(--muted); }

a { color: var(--accent); }

.skip {
  position: absolute;
  left: -999px;
}
.skip:focus {
  left: 1rem;
  top: 1rem;
  background: var(--accent);
  color: var(--accent-fg);
  padding: 0.5rem 1rem;
  border-radius: 6px;
}

:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 2px;
}

button.price {
  min-height: 44px;
  min-width: 44px;
  padding: 0.5rem 1.25rem;
  font: inherit;
  font-weight: 600;
  color: var(--accent-fg);
  background: var(--accent);
  border: 2px solid var(--accent);
  border-radius: 6px;
  cursor: pointer;
}

.offer-message { min-height: 3em; font-weight: 600; }

.sample {
  background: var(--card);
  border: 2px dashed var(--border);
  border-radius: 8px;
  padding: 1rem;
}

.table-wrap { overflow-x: auto; }

table {
  width: 100%;
  border-collapse: collapse;
  min-width: 28rem;
}
caption { text-align: left; font-weight: 600; padding-bottom: 0.5rem; }
th, td {
  text-align: left;
  padding: 0.4rem 0.5rem;
  border-bottom: 1px solid var(--border);
}
td.amount, th.amount { text-align: right; }