:root {
  --ink: #1f2a44;
  --muted: #4a5866;
  --accent: #2e6f95;
  --line: #d5dee6;
  --card: #ffffff;
  --page: #f4f7f9;
  --warn: #8a1c1c;
}
@media (prefers-color-scheme: dark) {
  :root {
    --ink: #e8eef3;
    --muted: #a9b6c2;
    --accent: #7cc0e6;
    --line: #34404c;
    --card: #1b232c;
    --page: #11171d;
    --warn: #f0a1a1;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font: 17px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  color: var(--ink);
  background: var(--page);
}
.preview-bar {
  background: #f6c343;
  color: #1f2a44;
  text-align: center;
  font-size: 14px;
  padding: 6px 16px;
}
.top, main, .foot { max-width: 720px; margin: 0 auto; padding: 0 16px; }
.top { padding-top: 20px; }
.brand { color: var(--accent); font-weight: 700; text-decoration: none; font-size: 20px; }
h1 { font-size: 30px; line-height: 1.2; margin: 24px 0 8px; }
h2 { font-size: 20px; margin: 0 0 12px; }
.lead { color: var(--muted); margin-top: 0; }
.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 20px;
  margin: 20px 0;
}
label { display: block; font-weight: 600; margin: 14px 0 6px; }
input, select {
  width: 100%;
  font: inherit;
  color: var(--ink);
  background: var(--page);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 10px 12px;
}
.money, .percent { display: flex; align-items: center; gap: 8px; }
.money span, .percent span { color: var(--muted); font-weight: 600; }
.hint { color: var(--muted); font-size: 15px; margin: 6px 0 0; }
.result dl { margin: 0; }
.result dl div { display: flex; justify-content: space-between; padding: 8px 0; border-bottom: 1px solid var(--line); }
.result dt { color: var(--muted); }
.result dd { margin: 0; font-weight: 600; }
.result .big dd { font-size: 26px; color: var(--accent); }
.offer .price { font-size: 22px; font-weight: 700; margin: 8px 0; }
.buy-pending { color: var(--muted); font-style: italic; }
.fine { font-size: 15px; color: var(--muted); margin: 28px 0; }
.fine h2 { font-size: 17px; color: var(--ink); }
.fine strong { color: var(--warn); }
.foot { color: var(--muted); font-size: 14px; padding-bottom: 32px; }
.byline { color: var(--muted); font-size: 14px; margin-left: 6px; }
.editions { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 14px; margin: 12px 0; }
.edition { border: 1px solid var(--line); border-radius: 10px; padding: 14px; }
.edition h3 { margin: 0; font-size: 17px; }
.button { display: inline-block; text-align: center; background: var(--accent); color: #fff; text-decoration: none; font-weight: 600; border-radius: 8px; padding: 10px 16px; margin-top: 8px; }
.button[aria-disabled="true"] { background: var(--line); color: var(--muted); pointer-events: none; }
main a.button { width: auto; }
@media (prefers-color-scheme: dark) { .button { color: #0f1a1c; } }