:root {
  --bg: #f7f8fa; --surface: #ffffff; --ink: #1d2129; --ink-2: #4a4f59; --muted: #7a808c;
  --line: #e5e7eb; --accent: #2563eb;
  /* 漲價 = 對使用者不利（紅），降價 = 有利（綠） */
  --up: #c62828; --up-bg: #fdecea; --down: #1b7f3b; --down-bg: #e7f5ec;
  --new: #1d4ed8; --new-bg: #e8effd; --removed: #6b7280; --removed-bg: #f0f1f3;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #111317; --surface: #16181d; --ink: #e6e8ec; --ink-2: #c9ccd3; --muted: #8b919c;
    --line: #2a2e36; --accent: #6aa8ff;
    --up: #ff7b72; --up-bg: #3a1d1d; --down: #56d38a; --down-bg: #15301f;
    --new: #8ab4ff; --new-bg: #1b2740; --removed: #9aa0aa; --removed-bg: #23262c;
  }
}
* { box-sizing: border-box; }
body { margin: 0; font: 14px/1.5 -apple-system, BlinkMacSystemFont, "PingFang TC", "Noto Sans TC", "Microsoft JhengHei", sans-serif; background: var(--bg); color: var(--ink); }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
h1 { font-size: 22px; margin: 0 0 4px; }
h2 { font-size: 16px; margin: 28px 0 10px; }
main { max-width: 1280px; margin: 0 auto; padding: 20px; }
footer { max-width: 1280px; margin: 0 auto; padding: 20px; color: var(--muted); font-size: 12px; }
.muted { color: var(--muted); }
.small { font-size: 12px; }

.topbar { display: flex; align-items: center; gap: 24px; padding: 12px 20px; background: var(--surface); border-bottom: 1px solid var(--line); position: sticky; top: 0; z-index: 5; }
.brand { font-weight: 700; color: var(--ink); }
.topbar nav { display: flex; gap: 4px; flex-wrap: wrap; }
.topbar nav a { padding: 6px 10px; border-radius: 6px; color: var(--ink-2); }
.topbar nav a.active, .topbar nav a:hover { background: var(--bg); color: var(--ink); text-decoration: none; }

.head { display: flex; justify-content: space-between; align-items: flex-start; gap: 16px; margin-bottom: 16px; }
.btn { border: 1px solid var(--line); background: var(--surface); padding: 6px 12px; border-radius: 6px; color: var(--ink); white-space: nowrap; }

.controls, .filters { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; margin-bottom: 12px; }
.seg { display: inline-flex; border: 1px solid var(--line); border-radius: 8px; overflow: hidden; background: var(--surface); }
.seg a { padding: 6px 14px; color: var(--ink-2); border-right: 1px solid var(--line); }
.seg a:last-child { border-right: 0; }
.seg a.on { background: var(--accent); color: #fff; text-decoration: none; }
select, input[type=search] { font: inherit; padding: 6px 10px; border: 1px solid var(--line); border-radius: 6px; background: var(--surface); color: var(--ink); }
input[type=search] { min-width: 240px; }
.check { display: inline-flex; gap: 6px; align-items: center; }
.notice { background: var(--new-bg); color: var(--ink); padding: 8px 12px; border-radius: 6px; }

.tiles { display: flex; gap: 8px; flex-wrap: wrap; margin: 12px 0; }
.tile { font: inherit; cursor: pointer; border: 1px solid var(--line); background: var(--surface); color: var(--ink-2); padding: 8px 14px; border-radius: 8px; }
.tile b { font-size: 18px; margin-left: 6px; color: var(--ink); }
.tile.on { outline: 2px solid var(--accent); outline-offset: -1px; }
.t-up b { color: var(--up); } .t-down b { color: var(--down); } .t-new b { color: var(--new); } .t-removed b { color: var(--removed); }

.table-wrap { overflow-x: auto; background: var(--surface); border: 1px solid var(--line); border-radius: 8px; }
table { width: 100%; border-collapse: collapse; }
th, td { padding: 8px 12px; text-align: left; border-bottom: 1px solid var(--line); vertical-align: top; }
th { position: sticky; top: 0; background: var(--surface); font-weight: 600; color: var(--ink-2); white-space: nowrap; cursor: pointer; user-select: none; }
#models th[data-dir=asc]::after { content: " ▲"; font-size: 10px; }
#models th[data-dir=desc]::after { content: " ▼"; font-size: 10px; }
tbody tr:hover { background: var(--bg); }
tr.gone td { opacity: .6; }
.num { text-align: right; font-variant-numeric: tabular-nums; white-space: nowrap; }
table.compact { background: var(--surface); border: 1px solid var(--line); border-radius: 8px; overflow: hidden; }
table.compact th { cursor: default; position: static; }

.tags { margin-top: 2px; }
.tags span, .pill { display: inline-block; font-size: 11px; padding: 0 6px; margin: 2px 4px 0 0; border-radius: 4px; background: var(--bg); color: var(--muted); border: 1px solid var(--line); }
.pill { cursor: help; }

.chg { font-size: 12px; font-weight: 600; }
.chg.up { color: var(--up); } .chg.down { color: var(--down); }
.chg.new { color: var(--new); } .chg.removed { color: var(--removed); }
.badge { display: inline-block; padding: 1px 8px; border-radius: 999px; font-size: 12px; white-space: nowrap; }
.b-up { background: var(--up-bg); color: var(--up); }
.b-down { background: var(--down-bg); color: var(--down); }
.b-new, .b-changed { background: var(--new-bg); color: var(--new); }
.b-removed, .b-no_data { background: var(--removed-bg); color: var(--removed); }
.b-same { background: var(--bg); color: var(--ink-2); border: 1px solid var(--line); }

.cards { display: flex; gap: 12px; flex-wrap: wrap; margin: 12px 0 4px; }
.card { background: var(--surface); border: 1px solid var(--line); border-radius: 8px; padding: 12px 16px; min-width: 160px; display: flex; flex-direction: column; }
.card b { font-size: 22px; font-variant-numeric: tabular-nums; }
.chart-box { margin: 0; background: var(--surface); border: 1px solid var(--line); border-radius: 8px; padding: 16px; height: 340px; }
.chart-box canvas { max-height: 280px; }
details { margin-top: 16px; }
summary { cursor: pointer; color: var(--accent); margin-bottom: 8px; }
.event { margin-bottom: 24px; }

@media (max-width: 720px) {
  .topbar { flex-direction: column; align-items: flex-start; gap: 8px; }
  .head { flex-direction: column; }
  input[type=search] { min-width: 0; width: 100%; }
}
.expr { background: var(--surface); border: 1px solid var(--line); border-radius: 8px; padding: 12px; white-space: pre-wrap; word-break: break-all; font-size: 12px; }