:root {
  color-scheme: light;
  --page: #f9f9f7;
  --surface: #fcfcfb;
  --surface-2: #f0efec;
  --text: #0b0b0b;
  --text-2: #52514e;
  --muted: #6f6d68;
  --grid: #e1e0d9;
  --axis: #c3c2b7;
  --border: rgba(11, 11, 11, 0.1);
  --accent: #2a78d6;        /* best-value series, links, selected controls */
  --accent-ink: #1c5cab;    /* accent as text on the light surface */
  --highlight: #eb6834;     /* the product hovered in the table */
  --other: rgba(137, 135, 129, 0.4);
  --warn-bg: #fdf0d5;
  --warn-text: #7a4a00;
  --badge-bg: #ecebe6;
  --radius: 10px;
  --font: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    color-scheme: dark;
    --page: #0d0d0d;
    --surface: #1a1a19;
    --surface-2: #242422;
    --text: #ffffff;
    --text-2: #c3c2b7;
    --muted: #9a988f;
    --grid: #2c2c2a;
    --axis: #383835;
    --border: rgba(255, 255, 255, 0.1);
    --accent: #3987e5;
    --accent-ink: #86b6ef;
    --highlight: #d95926;
    --other: rgba(137, 135, 129, 0.45);
    --warn-bg: #3a2c0c;
    --warn-text: #f5c86a;
    --badge-bg: #2c2c2a;
  }
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --page: #0d0d0d;
  --surface: #1a1a19;
  --surface-2: #242422;
  --text: #ffffff;
  --text-2: #c3c2b7;
  --muted: #9a988f;
  --grid: #2c2c2a;
  --axis: #383835;
  --border: rgba(255, 255, 255, 0.1);
  --accent: #3987e5;
  --accent-ink: #86b6ef;
  --highlight: #d95926;
  --other: rgba(137, 135, 129, 0.45);
  --warn-bg: #3a2c0c;
  --warn-text: #f5c86a;
  --badge-bg: #2c2c2a;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--page);
  color: var(--text);
  font: 15px/1.45 var(--font);
}

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

.page-header, main, .page-footer {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
}

.page-header { padding-top: 28px; }
h1 { font-size: 28px; line-height: 1.2; margin: 0 0 6px; }
h2 { font-size: 16px; margin: 0; }
.lede { margin: 0 0 20px; max-width: 70ch; color: var(--text-2); }
.muted { color: var(--muted); }

/* ------------------------------------------------------------ controls */

.controls {
  display: grid;
  gap: 14px;
  padding: 16px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.control-row {
  display: flex;
  flex-wrap: wrap;
  gap: 14px 20px;
  align-items: flex-end;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 0;
  margin: 0;
  padding: 0;
  border: 0;
}

.field-label {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-2);
  padding: 0;
}

.field-search { flex: 1 1 260px; }
.field-range { flex: 1 1 220px; }

input[type="search"], select, input[type="number"] {
  font: inherit;
  color: var(--text);
  background: var(--page);
  border: 1px solid var(--axis);
  border-radius: 6px;
  padding: 6px 8px;
  min-width: 0;
}

select { max-width: 240px; }
input[type="search"] { width: 100%; }
input[type="number"] { width: 64px; padding: 4px 6px; }
input[type="range"] { width: 100%; accent-color: var(--accent); }
input[type="checkbox"] { accent-color: var(--accent); }

output { font-weight: 600; color: var(--text); font-variant-numeric: tabular-nums; }

.segmented {
  display: inline-flex;
  border: 1px solid var(--axis);
  border-radius: 6px;
  overflow: hidden;
}
.segmented label { position: relative; }
.segmented input { position: absolute; opacity: 0; inset: 0; margin: 0; cursor: pointer; }
.segmented span { display: block; padding: 5px 14px; cursor: pointer; }
.segmented input:checked + span { background: var(--accent); color: #fff; }
.segmented input:focus-visible + span { outline: 2px solid var(--accent); outline-offset: -4px; }

.check { display: inline-flex; gap: 6px; align-items: center; cursor: pointer; }
.check-inline { margin-top: 6px; font-size: 13px; color: var(--text-2); }
.checks { gap: 8px 18px; }

.limits { display: flex; flex-wrap: wrap; gap: 6px 14px; }
.limits label { display: inline-flex; gap: 5px; align-items: center; font-size: 13px; color: var(--text-2); }

.link-button {
  font: inherit;
  background: none;
  border: 0;
  padding: 0;
  color: var(--accent-ink);
  text-decoration: underline;
  cursor: pointer;
  margin-left: auto;
}

.button {
  font: inherit;
  color: var(--text);
  background: var(--surface-2);
  border: 1px solid var(--axis);
  border-radius: 6px;
  padding: 7px 16px;
  cursor: pointer;
}
.button:hover { border-color: var(--muted); }

.summary { margin: 16px 2px 10px; color: var(--text-2); }
.summary strong { color: var(--text); }

/* ------------------------------------------------------------ cards */

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 16px;
}

.card-head {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 24px;
  align-items: baseline;
  justify-content: space-between;
  padding: 14px 16px 0;
}

.legend {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 16px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 13px;
  color: var(--text-2);
}
.legend li { display: inline-flex; align-items: center; gap: 6px; }
.key { display: inline-block; width: 10px; height: 10px; border-radius: 50%; }
.key-best { background: var(--accent); box-shadow: 0 0 0 2px var(--surface), 0 0 0 3px var(--accent); }
.key-other { background: var(--other); }

.chart-box { position: relative; height: 420px; padding: 8px 12px 12px; }

/* ------------------------------------------------------------ table */

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

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13.5px;
}

th, td {
  padding: 8px 10px;
  border-bottom: 1px solid var(--grid);
  text-align: left;
  vertical-align: middle;
}

th {
  position: sticky;
  top: 0;
  background: var(--surface);
  font-size: 12px;
  font-weight: 600;
  color: var(--text-2);
  line-height: 1.25;
  white-space: nowrap;
  cursor: pointer;
  user-select: none;
}
th:hover { color: var(--text); }
th[aria-sort]::after { content: " ↓"; color: var(--accent-ink); }
th[aria-sort="ascending"]::after { content: " ↑"; }
th .unit { font-weight: 400; color: var(--muted); }

.num { text-align: right; font-variant-numeric: tabular-nums; white-space: nowrap; }
th.num { text-align: right; }

.col-product {
  position: sticky;
  left: 0;
  z-index: 1;
  min-width: 280px;
  background: var(--surface);
}
th.col-product { z-index: 2; }
.product { display: flex; gap: 10px; align-items: center; }

.thumb {
  flex: none;
  width: 44px;
  height: 44px;
  object-fit: contain;
  background: #fff;
  border-radius: 6px;
}
.thumb-empty { display: inline-block; background: var(--surface-2); }

.product-name { font-weight: 500; text-decoration: none; color: var(--text); }
.product-name:hover { text-decoration: underline; color: var(--accent-ink); }
.product-meta { font-size: 12px; color: var(--muted); margin-top: 2px; }

.metric { font-weight: 600; color: var(--text); }
.secondary { color: var(--text-2); }
.cc-price { display: block; font-size: 12px; color: var(--text-2); }
.cc-price.active { color: var(--text); font-weight: 600; }

.badges { display: inline-flex; flex-wrap: wrap; gap: 4px; margin-left: 4px; vertical-align: 1px; }
.badge {
  font-size: 11px;
  line-height: 1;
  padding: 3px 6px;
  border-radius: 999px;
  background: var(--badge-bg);
  color: var(--text-2);
  white-space: nowrap;
  cursor: help;
}
.badge-warn { background: var(--warn-bg); color: var(--warn-text); }

tbody tr:hover td, tbody tr:focus-within td { background: var(--surface-2); }
tbody tr.best td:first-child { box-shadow: inset 3px 0 0 var(--accent); }

.table-foot { padding: 12px 16px; display: flex; justify-content: center; }
.table-foot:has(> [hidden]:only-child) { display: none; }

.empty { padding: 32px 16px; text-align: center; color: var(--text-2); }

/* ------------------------------------------------------------ footer */

.page-footer { padding-top: 8px; padding-bottom: 40px; color: var(--text-2); font-size: 13.5px; }
.page-footer summary { cursor: pointer; font-weight: 600; color: var(--text); }
.page-footer ul { padding-left: 20px; max-width: 80ch; }
.page-footer li { margin: 6px 0; }

@media (max-width: 640px) {
  .page-header, main, .page-footer { padding-left: 16px; padding-right: 16px; }
  h1 { font-size: 23px; }
  .controls { padding: 12px; }
  .control-row > .field:not(.field-search):not(.field-range) { flex: 1 1 calc(50% - 10px); }
  select { max-width: none; width: 100%; }
  .link-button { margin-left: 0; }
  .chart-box { height: 320px; padding: 4px 4px 8px; }
  .col-product { min-width: 0; width: 46vw; max-width: 200px; box-shadow: 1px 0 0 var(--grid); }
  tbody tr.best td.col-product { box-shadow: inset 3px 0 0 var(--accent), 1px 0 0 var(--grid); }
  .thumb { display: none; }
  th, td { padding: 8px 7px; }
}

[hidden] { display: none !important; }