/* FlightTicket 共用樣式：tokens、字體、基本元件。比價頁與監控台共用。 */
:root {
  --paper: #fbfaf8; --surface: #ffffff; --surface-2: #f4f2ee; --ink: #1c1a17; --ink-2: #5f5a52; --ink-3: #6b665e; --line: #e3dfd7; --line-2: #ece9e2;
  --signal: #b4531f; --signal-soft: #f7e6da; --ok: #1f7a4d; --ok-soft: #e4f1ea; --warn: #8a6a10; --warn-soft: #f8efd0;
  --block: #b3261e; --block-soft: #f8e1df; --signal-ink: #8f3f17; --on-signal: #ffffff; --on-signal-2: #f7e6da;
  --h0: #d5ebdd; --h1: #e6f1d9; --h2: #f7ecc6; --h3: #f6dbbb; --h4: #f2c7c3;
  --sans: -apple-system, "Segoe UI", "Noto Sans TC", "PingFang TC", system-ui, sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, Menlo, monospace;
  --radius: 10px; --shadow: none;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper: #16150f; --surface: #201f18; --surface-2: #26251d; --ink: #f1efe9; --ink-2: #b8b2a7; --ink-3: #a8a297; --line: #3b382f; --line-2: #2f2d25;
    --signal: #e08b4e; --signal-soft: #3a2a1c; --signal-ink: #e08b4e; --ok: #5fc08d; --ok-soft: #1f3a2c; --warn: #e8c35a; --warn-soft: #3a3116;
    --block: #ff6b5e; --block-soft: #46201c; --on-signal: #16150f; --on-signal-2: #3a2a1c;
    --h0: #1f4a33; --h1: #2c5a2c; --h2: #6d5a12; --h3: #7a4a1a; --h4: #7a2a26;
    --shadow: none;
  }
}
:root[data-theme="dark"] {
  --paper: #16150f; --surface: #201f18; --surface-2: #26251d; --ink: #f1efe9; --ink-2: #b8b2a7; --ink-3: #a8a297; --line: #3b382f; --line-2: #2f2d25;
  --signal: #e08b4e; --signal-soft: #3a2a1c; --signal-ink: #e08b4e; --ok: #5fc08d; --ok-soft: #1f3a2c; --warn: #e8c35a; --warn-soft: #3a3116;
  --block: #ff6b5e; --block-soft: #46201c; --on-signal: #16150f; --on-signal-2: #3a2a1c;
  --h0: #1f4a33; --h1: #2c5a2c; --h2: #6d5a12; --h3: #7a4a1a; --h4: #7a2a26;
  --shadow: none;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }
html { scroll-padding-top: 64px; }
html, body { margin: 0; background: var(--paper); color: var(--ink); font: 15px/1.6 var(--sans); -webkit-font-smoothing: antialiased; }
button, .btn, .input, .seg label, a { touch-action: manipulation; -webkit-tap-highlight-color: transparent; }
.skip { position: absolute; left: -9999px; top: 8px; z-index: 100; background: var(--surface); color: var(--ink); padding: 8px 12px; border-radius: 6px; border: 1px solid var(--line); }
.skip:focus { left: 12px; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; font-size: 24px; }
::selection { background: var(--signal-soft); color: var(--ink); }
:focus-visible { outline: 2px solid var(--signal); outline-offset: 2px; border-radius: 4px; }
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-thumb { background: var(--line); border-radius: 6px; border: 2px solid var(--paper); }
::-webkit-scrollbar-thumb:hover { background: var(--ink-3); }
::-webkit-scrollbar-track { background: transparent; }
a { color: var(--signal); text-decoration: none; text-underline-offset: 3px; }
a:hover { text-decoration: underline; }
button, input, select { font: inherit; color: var(--ink); }
.num { font-family: var(--mono); font-variant-numeric: tabular-nums; }
.muted { color: var(--ink-2); }
.small { font-size: 12.5px; }

/* 頂部導覽 */
#topnav { display: flex; align-items: center; gap: 4px; padding: 8px 20px; border-bottom: 1px solid var(--line); background: var(--surface); position: sticky; top: 0; z-index: 20; flex-wrap: wrap; }
#topnav a { padding: 6px 12px; border-radius: 6px; color: var(--ink-2); font-weight: 500; font-size: 13.5px; display: inline-flex; align-items: center; }
#topnav a:hover { text-decoration: none; background: var(--surface-2); color: var(--ink); }
#topnav a.on { background: var(--signal-soft); color: var(--signal); font-weight: 600; }
#topnav .spacer { flex: 1; }
#topnav .tools { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }

/* 狀態燈 */
.light { display: inline-flex; align-items: center; gap: 7px; padding: 3px 10px; border-radius: 999px; font-size: 12.5px; font-weight: 500; white-space: nowrap; }
.light::before { content: ""; width: 8px; height: 8px; border-radius: 50%; background: currentColor; flex: none; }
.light.ok { color: var(--ok); background: var(--ok-soft); }
.light.busy { color: var(--signal-ink, var(--signal)); background: var(--signal-soft); }
.light.busy::before { animation: pulse 1.2s ease-in-out infinite; }
.light.block { color: var(--block); background: var(--block-soft); }
.light.warn { color: var(--warn); background: var(--warn-soft); }
@keyframes pulse { 0%, 100% { opacity: 1; } 50% { opacity: .25; } }
@media (prefers-reduced-motion: reduce) { .light.busy::before { animation: none; } }

/* 容器 */
main { max-width: 1320px; margin: 0 auto; padding: 18px 20px 60px; display: grid; gap: 18px; }
@media (max-width: 720px) { main { padding: 12px 12px 48px; gap: 14px; } #topnav { padding: 8px 12px; } }
.panel { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 14px 16px; min-width: 0; box-shadow: var(--shadow); }
.panel > h2 { margin: 0 0 10px; font-size: 15px; font-weight: 600; display: flex; align-items: baseline; gap: 8px; flex-wrap: wrap; }
.panel > h2 small { font-weight: 400; color: var(--ink-2); font-size: 12.5px; }

/* 按鈕 */
.btn { display: inline-flex; align-items: center; gap: 6px; padding: 6px 12px; border-radius: 6px; border: 1px solid var(--line); background: var(--surface); cursor: pointer; font-size: 13.5px; line-height: 1.3; transition: background .15s, border-color .15s; }
.btn:hover { border-color: var(--ink-3); background: var(--surface-2); }
.btn.primary { background: var(--signal); border-color: var(--signal); color: var(--on-signal); }
.btn.primary:hover { filter: brightness(1.08); }
.btn.danger { color: var(--block); }
.btn.quiet { border-color: transparent; background: transparent; color: var(--ink-2); }
.btn.quiet:hover { background: var(--surface-2); color: var(--ink); }
.btn:disabled { opacity: .45; cursor: default; filter: none; }
.btn.sm { padding: 5px 10px; font-size: 12.5px; min-height: 32px; }
@media (pointer: coarse) { .btn, .btn.sm, .seg label, #topnav a { min-height: 40px; } }

/* 表單 */
.input { padding: 6px 9px; border: 1px solid var(--line); border-radius: 6px; background: var(--surface-2); min-width: 0; }
.input:focus-visible { outline: 2px solid var(--signal); outline-offset: 0; }
.seg { display: inline-flex; border: 1px solid var(--line); border-radius: 6px; overflow: hidden; }
.seg label { padding: 5px 11px; cursor: pointer; font-size: 13px; color: var(--ink-2); user-select: none; border-right: 1px solid var(--line); display: inline-flex; align-items: center; gap: 6px; }
.seg label:last-child { border-right: 0; }
.seg label:has(input:checked) { background: var(--signal-soft); color: var(--signal); font-weight: 600; }
.seg label:has(input:focus-visible) { outline: 2px solid var(--signal); outline-offset: -2px; }
.seg input { position: absolute; opacity: 0; width: 0; height: 0; }

/* 標籤 */
.chip { display: inline-block; padding: 1px 7px; border-radius: 4px; font-size: 12px; line-height: 1.5; white-space: nowrap; }
.chip.ok { background: var(--ok-soft); color: var(--ok); }
.chip.block { background: var(--block-soft); color: var(--block); }
.chip.warn { background: var(--warn-soft); color: var(--warn); }
.chip.gray { background: var(--surface-2); color: var(--ink-2); border: 1px solid var(--line-2); }
.chip.signal { background: var(--signal-soft); color: var(--signal); }

/* 表格 */
table.data { width: 100%; border-collapse: collapse; font-size: 13.5px; }
table.data th { text-align: left; color: var(--ink-2); font-weight: 500; font-size: 12.5px; padding: 8px 10px; border-bottom: 1px solid var(--line); white-space: nowrap; background: var(--surface); }
table.data td { padding: 8px 10px; border-bottom: 1px solid var(--line-2); vertical-align: top; }
table.data tr:last-child td { border-bottom: 0; }
table.data tbody tr:hover td { background: var(--surface-2); }
table.data .num { font-variant-numeric: tabular-nums; }
.wrap { overflow: auto; }
.wrap.sticky thead th { position: sticky; top: 0; z-index: 1; }
.empty { padding: 28px 12px; text-align: center; color: var(--ink-2); font-size: 13.5px; }
.empty b { display: block; color: var(--ink); font-weight: 600; margin-bottom: 4px; }

/* 價格與變化 */
.price { font-family: var(--mono); font-variant-numeric: tabular-nums; font-weight: 600; }
.delta { font-family: var(--mono); font-size: 12px; }
.delta.up { color: var(--block); } .delta.down { color: var(--ok); }

/* 提示 */
#toast { position: fixed; left: 50%; bottom: 20px; transform: translateX(-50%); background: var(--ink); color: var(--paper); padding: 9px 16px; border-radius: 8px; font-size: 13.5px; display: none; z-index: 50; box-shadow: var(--shadow); max-width: min(92vw, 520px); }