:root {
  --bg: #f5f6f8;
  --surface: #ffffff;
  --text: #1b1f27;
  --muted: #667085;
  --line: #e4e7ec;
  --accent: #2f6fed;
  --accent-soft: #e8f0ff;
  --good: #12805c;
  --good-soft: #e3f6ee;
  --warn: #a15c00;
  --warn-soft: #fff3dd;
  --shadow: 0 1px 2px rgba(16,24,40,.06), 0 1px 3px rgba(16,24,40,.08);
  --radius: 14px;
  --safe-b: env(safe-area-inset-bottom, 0px);
  --safe-t: env(safe-area-inset-top, 0px);
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1218;
    --surface: #181c24;
    --text: #eceff4;
    --muted: #9aa3b2;
    --line: #2a303b;
    --accent: #6b9bff;
    --accent-soft: #1e2a44;
    --good: #4cd3a0;
    --good-soft: #14302a;
    --warn: #f0b24a;
    --warn-soft: #33290f;
    --shadow: none;
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.5 -apple-system, BlinkMacSystemFont, "PingFang TC", "Noto Sans TC", "Microsoft JhengHei", sans-serif;
  padding-bottom: calc(76px + var(--safe-b));
}
button, input { font: inherit; color: inherit; }
button { cursor: pointer; }
h1, h2 { margin: 0; }

/* ---------- top bar ---------- */
.topbar {
  position: sticky; top: 0; z-index: 10;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
  padding-top: var(--safe-t);
}
.topbar-inner {
  max-width: 1000px; margin: 0 auto; padding: 10px 16px;
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
}
.brand { display: flex; align-items: center; gap: 8px; }
.brand h1 { font-size: 18px; font-weight: 700; }
.logo { font-size: 20px; }

/* tabs: 手機在底部、桌機在頂部 */
.tabs { display: flex; gap: 4px; }
.tabs button {
  border: 0; background: transparent; color: var(--muted);
  padding: 8px 14px; border-radius: 999px; font-weight: 600;
}
.tabs button.active { background: var(--accent-soft); color: var(--accent); }

@media (max-width: 767px) {
  .topbar { backdrop-filter: none; -webkit-backdrop-filter: none; background: var(--bg); }
  .tabs {
    position: fixed; left: 0; right: 0; bottom: 0; z-index: 20;
    background: var(--surface); border-top: 1px solid var(--line);
    padding: 6px 8px calc(6px + var(--safe-b));
    justify-content: space-around;
  }
  .tabs button { flex: 1; padding: 10px 6px; border-radius: 12px; }
}

main { max-width: 1000px; margin: 0 auto; padding: 16px; }
.tab { display: none; }
.tab.active { display: block; }

/* ---------- search ---------- */
.search { position: relative; }
.search input {
  width: 100%; height: 52px; padding: 0 44px 0 18px;
  border: 1.5px solid var(--line); border-radius: 999px;
  background: var(--surface); box-shadow: var(--shadow);
  font-size: 17px; outline: none;
  -webkit-appearance: none; appearance: none;
}
.search input:focus { border-color: var(--accent); }
.search input::-webkit-search-cancel-button { display: none; }
.clear {
  position: absolute; right: 8px; top: 8px; width: 36px; height: 36px;
  border: 0; border-radius: 50%; background: var(--line); color: var(--muted);
}

.scope { margin: 12px 4px 4px; }
.switch { display: inline-flex; align-items: center; gap: 10px; color: var(--muted); font-size: 14px; cursor: pointer; user-select: none; }
.switch input { position: absolute; opacity: 0; pointer-events: none; }
.track { width: 40px; height: 24px; border-radius: 999px; background: var(--line); position: relative; transition: background .15s; flex: none; }
.track::after { content: ""; position: absolute; top: 3px; left: 3px; width: 18px; height: 18px; border-radius: 50%; background: #fff; transition: transform .15s; box-shadow: 0 1px 2px rgba(0,0,0,.25); }
.switch input:checked + .track { background: var(--accent); }
.switch input:checked + .track::after { transform: translateX(16px); }
.switch input:focus-visible + .track { outline: 2px solid var(--accent); outline-offset: 2px; }

.chips { display: flex; flex-wrap: wrap; gap: 8px; margin: 12px 0 4px; }
.chip {
  border: 1px solid var(--line); background: var(--surface); color: var(--text);
  padding: 6px 14px; border-radius: 999px; font-size: 14px;
}
.chip:hover { border-color: var(--accent); color: var(--accent); }
.chip-label { align-self: center; color: var(--muted); font-size: 13px; margin-right: 2px; }

.banner {
  margin: 12px 0 0; padding: 10px 14px; border-radius: 12px;
  background: var(--warn-soft); color: var(--warn); font-size: 14px;
}

/* ---------- results ---------- */
.results {
  margin-top: 16px; display: grid; gap: 12px;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  align-items: start;
}
.empty { grid-column: 1 / -1; text-align: center; color: var(--muted); padding: 40px 12px; }

.result {
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius);
  box-shadow: var(--shadow); overflow: hidden; position: relative;
}
.result.best { border-color: var(--accent); box-shadow: 0 0 0 1px var(--accent), var(--shadow); }
.result-head {
  display: flex; align-items: center; gap: 12px; padding: 14px 16px 6px;
}
.dot { width: 10px; height: 44px; border-radius: 6px; flex: none; }
.who { min-width: 0; flex: 1; }
.who .bank { font-size: 12px; color: var(--muted); }
.who .name { font-weight: 700; line-height: 1.3; }
.rate { text-align: right; flex: none; }
.rate b { font-size: 30px; line-height: 1; letter-spacing: -.5px; color: var(--good); }
.rate small { font-size: 14px; color: var(--good); font-weight: 700; }
.result.best .result-head { padding-top: 26px; }
.crown { position: absolute; top: 0; right: 0; background: var(--accent); color: #fff; font-size: 11px; font-weight: 700; padding: 3px 10px; border-bottom-left-radius: 10px; }

.tags { display: flex; flex-wrap: wrap; gap: 6px; padding: 4px 16px 0; }
.tag { font-size: 12px; padding: 2px 8px; border-radius: 6px; background: var(--accent-soft); color: var(--accent); font-weight: 600; }
.tag.warn { background: var(--warn-soft); color: var(--warn); }
.tag.plain { background: var(--line); color: var(--muted); }

.target { padding: 8px 16px 0; font-weight: 600; }
.meta { padding: 4px 16px 0; color: var(--muted); font-size: 14px; }
.steps { margin: 8px 16px 0; padding: 10px 12px 10px 30px; background: var(--bg); border-radius: 10px; font-size: 14px; }
.steps li + li { margin-top: 2px; }
.cond { padding: 8px 16px 0; font-size: 13px; color: var(--muted); }
.foot-row {
  display: flex; align-items: center; justify-content: space-between; gap: 8px;
  padding: 10px 16px 12px; font-size: 12px; color: var(--muted);
}
.foot-row a { color: var(--accent); text-decoration: none; }
.more { border-top: 1px solid var(--line); }
.more summary { padding: 10px 16px; font-size: 14px; color: var(--accent); cursor: pointer; list-style: none; font-weight: 600; }
.more summary::-webkit-details-marker { display: none; }
.more-item { padding: 10px 16px; border-top: 1px dashed var(--line); font-size: 14px; }
.more-item .line { display: flex; justify-content: space-between; gap: 12px; font-weight: 600; }
.more-item .line span:last-child { color: var(--good); }
.more-item .sub { color: var(--muted); font-size: 13px; margin-top: 2px; }

/* ---------- cards tab ---------- */
.hint { color: var(--muted); font-size: 14px; margin: 0 0 12px; }
.cardlist { display: grid; gap: 10px; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); }
.cardrow {
  display: flex; align-items: center; gap: 12px; padding: 14px 16px;
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow);
}
.cardrow .who { flex: 1; }
.cardrow .sub { color: var(--muted); font-size: 13px; }

/* ---------- about ---------- */
.panel { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 16px; margin-bottom: 12px; box-shadow: var(--shadow); }
.panel h2 { font-size: 16px; margin-bottom: 10px; }
.kv { display: grid; grid-template-columns: 90px 1fr; gap: 6px 12px; margin: 0 0 12px; font-size: 14px; }
.kv dt { color: var(--muted); }
.kv dd { margin: 0; word-break: break-all; }
.row { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 10px; }
.btn { border: 0; background: var(--accent); color: #fff; padding: 10px 16px; border-radius: 10px; font-weight: 600; }
.btn.ghost { background: var(--line); color: var(--text); }
.text { width: 100%; height: 44px; padding: 0 12px; border-radius: 10px; border: 1px solid var(--line); background: var(--bg); }
.foot { color: var(--muted); font-size: 12px; text-align: center; margin: 20px 0 0; }

.toast {
  position: fixed; left: 50%; transform: translateX(-50%); bottom: calc(90px + var(--safe-b)); z-index: 30;
  background: #1b1f27; color: #fff; padding: 10px 16px; border-radius: 999px; font-size: 14px; box-shadow: 0 6px 20px rgba(0,0,0,.25);
}

@media (min-width: 768px) {
  body { padding-bottom: 32px; }
  main { padding: 24px 16px; }
  .search { max-width: 640px; }
  .toast { bottom: 32px; }
}