/* Author display rules (e.g. .more { display: block }) would otherwise override the hidden attribute. */
[hidden] { display: none !important; }

:root {
  --bg: #f7f7f5;
  --surface: #ffffff;
  --surface-2: #f1f1ee;
  --text: #1c1c1a;
  --muted: #6b6b66;
  --border: #e2e2dd;
  --accent: #166534;
  --accent-soft: #dcfce7;
  --link: #1d4ed8;
  --tier-a: #15803d; --tier-a-bg: #dcfce7;
  --tier-b: #0e7490; --tier-b-bg: #cffafe;
  --tier-c: #a16207; --tier-c-bg: #fef3c7;
  --tier-d: #c2410c; --tier-d-bg: #ffedd5;
  --tier-f: #b91c1c; --tier-f-bg: #fee2e2;
  --radius: 8px;
  --up: #b91c1c;
  --down: #15803d;
  --star: #d97706;
  /* 80 Plus badges, in the colour of each metal */
  --eff-t: #f8fafc; --eff-t-bg: #334155;
  --eff-p: #1e3a8a; --eff-p-bg: #dbeafe;
  --eff-g: #713f12; --eff-g-bg: #fde047;
  --eff-s: #3f3f46; --eff-s-bg: #e4e4e7;
  --eff-b: #6b2f12; --eff-b-bg: #f3cfae;
  --eff-w: #44403c; --eff-w-bg: #ffffff;
  color-scheme: light;
}

:root[data-theme="dark"] {
  --bg: #121211;
  --surface: #1b1b1a;
  --surface-2: #242422;
  --text: #ececea;
  --muted: #9d9d97;
  --border: #33332f;
  --accent: #4ade80;
  --accent-soft: #14532d;
  --link: #93c5fd;
  --tier-a: #86efac; --tier-a-bg: #14532d;
  --tier-b: #67e8f9; --tier-b-bg: #164e63;
  --tier-c: #fcd34d; --tier-c-bg: #713f12;
  --tier-d: #fdba74; --tier-d-bg: #7c2d12;
  --tier-f: #fca5a5; --tier-f-bg: #7f1d1d;
  --up: #fca5a5;
  --down: #86efac;
  --eff-t: #0f172a; --eff-t-bg: #cbd5e1;
  --eff-p: #bfdbfe; --eff-p-bg: #1e3a8a;
  --eff-g: #1c1917; --eff-g-bg: #facc15;
  --eff-s: #e4e4e7; --eff-s-bg: #3f3f46;
  --eff-b: #f6c08f; --eff-b-bg: #5a2a10;
  --eff-w: #f5f5f4; --eff-w-bg: #1b1b1a;
  color-scheme: dark;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --up: #fca5a5;
    --down: #86efac;
    --eff-t: #0f172a; --eff-t-bg: #cbd5e1;
    --eff-p: #bfdbfe; --eff-p-bg: #1e3a8a;
    --eff-g: #1c1917; --eff-g-bg: #facc15;
    --eff-s: #e4e4e7; --eff-s-bg: #3f3f46;
    --eff-b: #f6c08f; --eff-b-bg: #5a2a10;
    --eff-w: #f5f5f4; --eff-w-bg: #1b1b1a;
    --bg: #121211;
    --surface: #1b1b1a;
    --surface-2: #242422;
    --text: #ececea;
    --muted: #9d9d97;
    --border: #33332f;
    --accent: #4ade80;
    --accent-soft: #14532d;
    --link: #93c5fd;
    --tier-a: #86efac; --tier-a-bg: #14532d;
    --tier-b: #67e8f9; --tier-b-bg: #164e63;
    --tier-c: #fcd34d; --tier-c-bg: #713f12;
    --tier-d: #fdba74; --tier-d-bg: #7c2d12;
    --tier-f: #fca5a5; --tier-f-bg: #7f1d1d;
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 15px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

a { color: var(--link); }
h1, h2, h3 { line-height: 1.2; }

.wrap { max-width: 1280px; margin: 0 auto; padding: 0 16px; }

.visually-hidden {
  position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap;
}

.site-header { padding: 28px 0 12px; }
.site-header h1 { margin: 0 0 4px; font-size: 1.75rem; letter-spacing: -0.01em; }
.header-grid { display: grid; grid-template-columns: 1fr auto; column-gap: 12px; align-items: start; }
.header-grid .lede { grid-column: 1 / -1; }
.icon-btn {
  width: 38px; height: 38px; display: grid; place-items: center; cursor: pointer;
  background: var(--surface); color: var(--text); border: 1px solid var(--border); border-radius: var(--radius);
}
.icon-btn:hover { border-color: var(--accent); }
.icon-btn svg { width: 18px; height: 18px; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.icon-btn .i-sun, :root[data-theme="dark"] .icon-btn .i-moon { display: none; }
:root[data-theme="dark"] .icon-btn .i-sun { display: block; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .icon-btn .i-moon { display: none; }
  :root:not([data-theme="light"]) .icon-btn .i-sun { display: block; }
}
.site-header h1 a { color: inherit; text-decoration: none; }
.site-header h1 a:hover { color: var(--accent); }
.lede { margin: 0; color: var(--muted); }

/* Controls */
.controls {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px;
  display: grid;
  gap: 12px;
  margin-top: 12px;
}

.search-row { display: flex; gap: 10px; flex-wrap: wrap; }
.search { flex: 1 1 320px; position: relative; display: flex; }
.search svg {
  position: absolute; left: 11px; top: 50%; translate: 0 -50%;
  width: 18px; height: 18px; fill: none; stroke: var(--muted); stroke-width: 2; stroke-linecap: round;
}
.search input {
  width: 100%;
  padding: 10px 40px 10px 38px;
  font: inherit;
  font-size: 16px;
  color: var(--text);
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}
.search input::-webkit-search-cancel-button { display: none; }
.search-hint, .q-clear { position: absolute; right: 9px; top: 50%; translate: 0 -50%; }
.search-hint {
  font: 12px/1 ui-monospace, monospace; color: var(--muted); padding: 3px 7px;
  border: 1px solid var(--border); border-radius: 5px; background: var(--surface); pointer-events: none;
}
.search input:focus ~ .search-hint, .search input:not(:placeholder-shown) ~ .search-hint { display: none; }
.q-clear {
  width: 26px; height: 26px; border: 0; border-radius: 50%; cursor: pointer;
  font-size: 18px; line-height: 1; color: var(--muted); background: transparent;
}
.q-clear:hover { background: var(--border); color: var(--text); }
.search input:focus, select:focus-visible, button:focus-visible, tr.psu:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
}

.sort { display: flex; align-items: center; gap: 8px; }
.sort span, .label, .filter-row label span { color: var(--muted); font-size: 13px; }

select {
  font: inherit;
  font-size: 14px;
  color: var(--text);
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 7px 8px;
  min-width: 0;
}

.more-filters { display: grid; gap: 12px; }
.filters-toggle { display: none; }

.filter-row {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  gap: 10px;
}
.filter-row label { display: grid; gap: 3px; }

.toggle-row { display: flex; flex-wrap: wrap; gap: 8px 18px; align-items: center; font-size: 14px; }
.check { display: inline-flex; gap: 6px; align-items: center; cursor: pointer; }
.check input { accent-color: var(--accent); width: 16px; height: 16px; }

.store-row { display: flex; align-items: center; gap: 10px 14px; flex-wrap: wrap; font-size: 14px; }
.store-list { display: flex; flex-wrap: wrap; gap: 6px 18px; }

.link-btn {
  font: inherit; font-size: 13px; background: none; border: 0; padding: 4px 2px;
  color: var(--link); cursor: pointer; text-decoration: underline;
}

.status { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 4px 16px; margin: 14px 2px 8px; }
.status p { margin: 0; }
#count { font-weight: 600; }
.muted { color: var(--muted); }
.small { font-size: 12px; }

/* Table */
.table-wrap {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: clip;
}
table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: 9px 10px; border-bottom: 1px solid var(--border); vertical-align: top; }
th { position: sticky; top: 0; z-index: 2; box-shadow: inset 0 -1px 0 var(--border);
  font-size: 12px; text-transform: uppercase; letter-spacing: 0.04em; color: var(--muted); background: var(--surface-2); font-weight: 600; }
th button {
  font: inherit; text-transform: inherit; letter-spacing: inherit; color: inherit;
  background: none; border: 0; padding: 0; cursor: pointer;
}
th button::after { content: " ↕"; opacity: 0.4; }
th button.active { color: var(--text); }
th button.active::after { content: " ●"; opacity: 1; font-size: 8px; vertical-align: middle; color: var(--accent); }

tr.psu { cursor: pointer; }
tr.psu:hover { background: var(--surface-2); }
tr.psu[aria-expanded="true"] { background: var(--surface-2); }
tr.psu[aria-expanded="true"] td { border-bottom-color: transparent; }

.c-tier { width: 64px; }
.c-year, .c-spec { white-space: nowrap; }
.c-watts { white-space: nowrap; font-variant-numeric: tabular-nums; }
.c-price { text-align: right; white-space: nowrap; }
th.c-price { text-align: right; }
.c-price .price { font-weight: 700; font-variant-numeric: tabular-nums; display: block; }
.c-price .small { display: block; line-height: 1.3; }
.brand { font-weight: 600; }
.star {
  display: inline-grid; place-items: center; width: 24px; height: 24px; padding: 0; margin: -2px 4px 0 -4px;
  vertical-align: middle; background: none; border: 0; border-radius: 50%; cursor: pointer; color: var(--muted);
}
.star svg { width: 18px; height: 18px; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linejoin: round; }
/* Not a favorite: grey outline; hover tints the outline. Favorite: filled orange. */
.star:hover { color: var(--star); }
.star[aria-pressed="true"] { color: var(--star); }
.star[aria-pressed="true"] svg { fill: currentColor; }
.trend { font-size: 12px; font-weight: 600; margin-right: 4px; }
.trend.down { color: var(--down); }
.trend.up { color: var(--up); }
.spark { width: 100%; max-width: 360px; height: 60px; display: block; margin: 6px 0; }
.spark path { fill: none; stroke: var(--accent); stroke-width: 2; }
.series { color: var(--text); }

.tier {
  display: inline-block;
  min-width: 40px;
  text-align: center;
  font-weight: 700;
  font-size: 14px;
  padding: 2px 6px;
  border-radius: 6px;
}
.tier-a.tier { background: var(--tier-a-bg); color: var(--tier-a); }
.tier-b.tier { background: var(--tier-b-bg); color: var(--tier-b); }
.tier-c.tier { background: var(--tier-c-bg); color: var(--tier-c); }
.tier-d.tier { background: var(--tier-d-bg); color: var(--tier-d); }
.tier-f.tier { background: var(--tier-f-bg); color: var(--tier-f); }

/* 80 Plus rating as a small badge; the letter stays, colour is a second cue */
.eff {
  display: inline-block; min-width: 22px; padding: 1px 5px; border-radius: 5px;
  text-align: center; font-size: 13px; font-weight: 700; line-height: 1.4;
  color: var(--fg, var(--muted)); background: var(--bg-c, transparent);
  box-shadow: inset 0 0 0 1px var(--ring, transparent);
}
.eff-T { --fg: var(--eff-t); --bg-c: var(--eff-t-bg); }
.eff-P { --fg: var(--eff-p); --bg-c: var(--eff-p-bg); }
.eff-G { --fg: var(--eff-g); --bg-c: var(--eff-g-bg); }
.eff-S { --fg: var(--eff-s); --bg-c: var(--eff-s-bg); }
.eff-B { --fg: var(--eff-b); --bg-c: var(--eff-b-bg); }
.eff-W { --fg: var(--eff-w); --bg-c: var(--eff-w-bg); --ring: var(--border); }
.eff-N { --ring: var(--border); font-weight: 600; }
.eff.m-only { display: none; margin-left: 6px; }
.legend .eff { margin-right: 3px; }
.est {
  display: inline-block; margin-left: 4px; width: 15px; height: 15px; line-height: 15px;
  border-radius: 50%; text-align: center; font-size: 11px; font-weight: 700;
  background: var(--surface-2); color: var(--muted); border: 1px solid var(--border); cursor: help;
}

/* Expanded details */
tr.detail > td { background: var(--surface-2); padding: 4px 14px 18px; }
.detail-grid {
  display: grid;
  grid-template-columns: minmax(220px, 1fr) minmax(220px, 1.2fr);
  gap: 14px 28px;
}
.detail-grid h3 { font-size: 13px; text-transform: uppercase; letter-spacing: 0.04em; color: var(--muted); margin: 10px 0 6px; }
.detail-grid p { margin: 0 0 6px; }
.specs { margin: 10px 0 0; display: grid; grid-template-columns: repeat(auto-fill, minmax(130px, 1fr)); gap: 8px 16px; }
.specs dt { font-size: 12px; color: var(--muted); }
.specs dd { margin: 0; }
.offer-table { width: 100%; border-collapse: collapse; font-size: 14px; }
.offer-table td { padding: 5px 8px 0 0; border: 0; vertical-align: baseline; }
.offer-table .o-price { text-align: right; white-space: nowrap; font-variant-numeric: tabular-nums; }
.offer-table .o-price a { font-weight: 700; }
.offer-table .o-name td { padding-top: 0; font-size: 12px; color: var(--muted); border-bottom: 1px solid var(--border); padding-bottom: 5px; }
.stores p { display: flex; flex-wrap: wrap; gap: 6px 14px; }

.empty { text-align: center; padding: 40px 0; color: var(--muted); }
.more {
  display: block; margin: 16px auto 0; font: inherit; font-weight: 600;
  padding: 10px 20px; border-radius: var(--radius); cursor: pointer;
  background: var(--surface); color: var(--text); border: 1px solid var(--border);
}
.more:hover { border-color: var(--accent); }

.about { margin: 40px 0 60px; max-width: 760px; color: var(--muted); }
.about h2 { color: var(--text); font-size: 1.1rem; }
.legend { display: grid; gap: 4px; margin: 16px 0 0; font-size: 14px; }
.legend div { display: flex; gap: 10px; }
.legend dt { font-weight: 600; color: var(--text); min-width: 100px; }
.legend dd { margin: 0; }

/* Phones: each row becomes a card */
@media (max-width: 760px) {
  .eff.m-only { display: inline-block; font-size: 12px; }
  .filters-toggle {
    display: block; font: inherit; font-size: 14px; font-weight: 600; cursor: pointer;
    padding: 7px 12px; border-radius: 6px; border: 1px solid var(--border); background: var(--surface-2); color: var(--text);
  }
  .filters-toggle[aria-expanded="true"] { border-color: var(--accent); }
  .more-filters { display: none; }
  .more-filters.open { display: grid; }
  .search-hint { display: none; }
  .sort { flex: 1 1 0; }
  .sort select { flex: 1; }
  .filter-row { grid-template-columns: 1fr 1fr; }
  thead { display: none; }
  table, tbody { display: block; }
  tr.psu {
    display: grid;
    grid-template-columns: auto 1fr auto;
    gap: 2px 10px;
    padding: 10px 12px;
    border-bottom: 1px solid var(--border);
  }
  tr.psu td { border: 0; padding: 0; }
  tr.psu .c-tier { grid-row: span 2; width: auto; }
  tr.psu .c-name { grid-column: 2; }
  tr.psu .c-price { grid-column: 3; grid-row: 1 / span 2; }
  tr.psu .c-watts, tr.psu .c-year, tr.psu .c-spec {
    grid-column: 2; display: inline; font-size: 13px; color: var(--muted);
  }
  tr.psu .c-watts { grid-row: 2; }
  tr.psu .c-year, tr.psu .c-spec { display: none; }
  tr.detail { display: block; }
  tr.detail > td { display: block; padding: 4px 12px 16px; }
  .detail-grid { grid-template-columns: 1fr; }
}