:root {
  --bg: #f4f5f8; --card: #fff; --text: #1a1d23; --muted: #667085; --line: #e4e7ec;
  --accent: #2557e8; --accent-bg: #e9efff; --good: #0a7d3b; --good-bg: #e4f5ea;
  --warn: #8a5a00; --warn-bg: #fff2d6; --bad: #b3261e;
  --radius: 12px; --shadow: 0 1px 2px rgb(16 24 40 / 6%), 0 1px 3px rgb(16 24 40 / 8%);
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #101216; --card: #1a1d23; --text: #e8eaee; --muted: #9aa1ad; --line: #2b3039;
    --accent: #7ba2ff; --accent-bg: #1c2744; --good: #52d28a; --good-bg: #143a24;
    --warn: #f0c060; --warn-bg: #3a2d10; --bad: #ff8a80; --shadow: none;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; font: 16px/1.5 system-ui, -apple-system, "Segoe UI", sans-serif; background: var(--bg); color: var(--text); }
a { color: var(--accent); }
img, canvas { max-width: 100%; }

/* Header */
header.site { background: var(--card); border-bottom: 1px solid var(--line); position: sticky; top: 0; z-index: 10; }
header.site nav { max-width: 1100px; margin: 0 auto; padding: 0 1rem; display: flex; align-items: center; gap: .25rem; }
header.site a { color: var(--muted); text-decoration: none; padding: .85rem .6rem; font-weight: 500; border-bottom: 2px solid transparent; }
header.site a:hover { color: var(--text); }
header.site a.active { color: var(--text); border-bottom-color: var(--accent); }
header.site a.brand { color: var(--text); font-weight: 800; letter-spacing: -.02em; font-size: 1.1rem; padding-left: 0; margin-right: .75rem; border: 0; }
header.site .spacer { flex: 1; }

main { max-width: 1100px; margin: 0 auto; padding: 1rem; }
h1 { font-size: 1.5rem; line-height: 1.25; letter-spacing: -.01em; margin: .5rem 0 1rem; }

/* Surfaces */
.layout { display: grid; grid-template-columns: 15rem 1fr; gap: 1.25rem; align-items: start; }
.layout.detail { grid-template-columns: 18rem 1fr; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 1rem; box-shadow: var(--shadow); }
.card + .card, .stack > * + * { margin-top: 1rem; }
.scroll { overflow-x: auto; }
.back { display: inline-block; margin: .25rem 0; text-decoration: none; }

/* Filters */
details.filters > summary { cursor: pointer; font-weight: 600; list-style: none; }
details.filters > summary::-webkit-details-marker { display: none; }
details.filters > summary::after { content: "▾"; float: right; color: var(--muted); }
details.filters[open] > summary { margin-bottom: .75rem; }
fieldset { border: 0; padding: 0; margin: 0 0 1rem; }
legend { font-weight: 600; margin-bottom: .25rem; }
fieldset label, .check { display: flex; align-items: center; gap: .5rem; font-size: .95rem; padding: .2rem 0; }
input[type=checkbox] { width: 1.1rem; height: 1.1rem; accent-color: var(--accent); flex: none; }

/* Tables */
table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: .6rem .5rem; border-bottom: 1px solid var(--line); vertical-align: top; }
tbody tr:last-child td { border-bottom: 0; }
th { font-size: .75rem; color: var(--muted); text-transform: uppercase; letter-spacing: .04em; }
td.num, th.num { text-align: right; white-space: nowrap; }
tr.best { background: var(--good-bg); }

/* Small elements */
.badge { display: inline-block; font-size: .75rem; line-height: 1.5; padding: 0 .5rem; border-radius: 99px;
  border: 1px solid var(--line); color: var(--muted); white-space: nowrap; }
.badge.first-party { color: var(--good); border-color: var(--good); }
.badge.marketplace { color: var(--warn); border-color: var(--warn); }
.badge.discount { background: var(--good-bg); color: var(--good); border-color: transparent; font-weight: 600; }
.badge.status-bad { color: var(--bad); border-color: var(--bad); }
.message { border-left: 4px solid var(--accent); margin-bottom: .75rem; }
.message.success { border-left-color: var(--good); }
.message.warning { border-left-color: var(--warn); }
.message.error { border-left-color: var(--bad); }
.muted { color: var(--muted); }
.stale { opacity: .55; }
.price { font-weight: 700; font-size: 1.15rem; font-variant-numeric: tabular-nums; }
.chips { display: flex; flex-wrap: wrap; gap: .3rem; margin-top: .35rem; }
.toolbar { display: flex; flex-wrap: wrap; gap: .5rem 1rem; align-items: center; margin-bottom: 1rem; }

/* Controls */
input[type=url], input[type=number], input[type=text], input[type=password], input[type=email], input[type=date], textarea, select {
  font: inherit; padding: .45rem .6rem; max-width: 100%; border: 1px solid var(--line); border-radius: 8px;
  background: var(--card); color: var(--text); min-height: 2.5rem; }
button, .button { font: inherit; padding: .4rem .9rem; min-height: 2.5rem; border: 1px solid var(--line); border-radius: 8px;
  background: var(--card); color: var(--text); cursor: pointer; text-decoration: none; display: inline-flex; align-items: center; }
button[type=submit] { background: var(--accent); border-color: var(--accent); color: #fff; }
button.active { background: var(--accent-bg); border-color: var(--accent); color: var(--accent); }
.segmented { display: inline-flex; gap: .25rem; }
.field { margin: .5rem 0; }
.field input[type=url], .field input[type=text], .field input[type=password], .field input[type=email], .field textarea { width: 100%; }
details.manage { margin: .5rem 0; padding: .25rem 0; border-top: 1px solid var(--line); }
details.manage summary { cursor: pointer; font-weight: 600; padding: .35rem 0; }

/* Product cards */
.product-card { display: flex; justify-content: space-between; gap: 1rem; flex-wrap: wrap; margin-bottom: .75rem; }
.product-card > .offer { text-align: right; }
.product-card .title { color: var(--text); text-decoration: none; font-size: 1.05rem; }
.product-card .title:hover { color: var(--accent); }
.chart-box { position: relative; height: 300px; }

dl.specs { display: grid; grid-template-columns: max-content 1fr; gap: .25rem 1rem; margin: 0; }
dl.specs dt { color: var(--muted); }
dl.specs dd { margin: 0; }

/* Tablet and phone */
@media (max-width: 760px) {
  .layout, .layout.detail { grid-template-columns: 1fr; gap: 1rem; }
  main { padding: .75rem; }
  h1 { font-size: 1.3rem; }
  header.site nav { padding: 0 .75rem; }
  header.site a { padding: .8rem .45rem; }
  header.site a.brand { margin-right: .25rem; }
  .product-card > .offer { text-align: left; width: 100%; }
  .chart-box { height: 240px; }
  button, input[type=url], input[type=number], input[type=text], input[type=password], input[type=email], input[type=date], textarea, select { min-height: 2.75rem; font-size: 1rem; }
  fieldset label, .check { padding: .35rem 0; }

  /* Tables become one card per row, labelled through data-label. */
  table.stacked thead { display: none; }
  table.stacked, table.stacked tbody, table.stacked tr, table.stacked td { display: block; width: 100%; }
  table.stacked tr { padding: .6rem 0; border-bottom: 1px solid var(--line); }
  table.stacked tbody tr:last-child { border-bottom: 0; }
  table.stacked td { border: 0; padding: .15rem 0; display: flex; justify-content: space-between; gap: 1rem; text-align: right; }
  table.stacked td[data-label]::before { content: attr(data-label); color: var(--muted); font-size: .8rem; text-align: left; flex: none; }
  table.stacked td.num { white-space: normal; }
  table.stacked td.full { display: block; text-align: left; }
  table.stacked td.full::before { display: none; }
  table.stacked td:empty { display: none; }
}
form.manual-price { margin-top: .75rem; }