:root {
  --sky: #0284c7;
  --ink: #0f172a;
  --muted: #475569;
  --line: #e2e8f0;
  --panel: #ffffff;
  --page: #f8fafc;
  --ok: #047857;
  --bad: #b91c1c;
  --warn: #92400e;
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: "Segoe UI", sans-serif;
  color: var(--ink);
  background: var(--page);
  letter-spacing: -0.01em;
}
header.site {
  position: sticky;
  top: 0;
  z-index: 5;
  display: flex;
  align-items: center;
  gap: 0.85rem;
  padding: 0.75rem 1.5rem;
  background: var(--panel);
  border-bottom: 1px solid var(--line);
}
header.site img { width: 44px; height: 44px; }
.wordmark { font-size: 1.75rem; line-height: 1; color: var(--sky); letter-spacing: -0.03em; }
.wordmark b { font-weight: 700; }
.kicker { margin-left: 0.35rem; font-size: 0.72rem; letter-spacing: 0.12em; color: var(--muted); }
main { max-width: 1080px; margin: 0 auto; padding: 1.5rem; }
.banner {
  background: #e0f2fe;
  border: 1px solid #bae6fd;
  color: #0c4a6e;
  border-radius: 12px;
  padding: 0.85rem 1rem;
  margin-bottom: 1.25rem;
}
h1 { font-size: 1.7rem; font-weight: 650; margin: 0 0 0.35rem; letter-spacing: -0.03em; }
.lede { color: var(--muted); margin: 0 0 1.25rem; max-width: 46rem; }
.steps { display: flex; gap: 0.5rem; margin-bottom: 1.25rem; flex-wrap: wrap; }
.steps span {
  border: 1px solid var(--line);
  background: var(--panel);
  border-radius: 999px;
  padding: 0.25rem 0.7rem;
  font-size: 0.85rem;
  color: var(--muted);
}
.steps span.on { border-color: var(--sky); color: var(--sky); font-weight: 650; }
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(190px, 1fr)); gap: 0.75rem; }
.card, .panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 1rem;
}
.card { cursor: pointer; text-align: left; font: inherit; color: inherit; width: 100%; }
.card.on { border-color: var(--sky); box-shadow: inset 0 0 0 1px var(--sky); }
.card .price { font-size: 1.45rem; letter-spacing: -0.03em; margin: 0.35rem 0; }
.card .price span { font-size: 0.85rem; color: var(--muted); }
.badge {
  display: inline-block;
  background: #e0f2fe;
  color: #075985;
  border-radius: 999px;
  font-size: 0.75rem;
  padding: 0.1rem 0.45rem;
}
.was { color: var(--muted); text-decoration: line-through; font-size: 0.85rem; }
label { display: block; font-size: 0.85rem; margin: 0.75rem 0 0.25rem; }
input, button.primary, button.ghost {
  font: inherit;
}
input {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 0.55rem 0.7rem;
  background: #fff;
}
.row { display: grid; grid-template-columns: 1fr 1fr; gap: 0.75rem; }
.actions { display: flex; gap: 0.6rem; margin-top: 1rem; flex-wrap: wrap; }
button.primary, button.ghost {
  border-radius: 10px;
  padding: 0.55rem 0.9rem;
  cursor: pointer;
}
button.primary { background: var(--sky); color: white; border: 0; }
button.ghost { background: white; border: 1px solid var(--line); }
button:disabled { opacity: 0.55; cursor: default; }
.hidden { display: none; }
.err { color: var(--bad); margin-top: 0.6rem; }
.ok { color: var(--ok); }
.warn { color: var(--warn); }
table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: 0.4rem 0; border-bottom: 1px solid var(--line); vertical-align: top; }
code, .mono { font-family: Consolas, monospace; }
.sources { color: var(--muted); font-size: 0.85rem; }
.sources li { margin: 0.25rem 0; }
.check { display: flex; gap: 0.5rem; align-items: flex-start; margin-top: 0.8rem; }
.check input { width: auto; margin-top: 0.2rem; }
@media (max-width: 720px) {
  .row { grid-template-columns: 1fr; }
  .kicker { display: none; }
}