:root {
  --ground: #EEF1F4; --surface: #FFFFFF; --sunken: #F5F7F9; --ink: #15202B; --muted: #5A6776;
  --faint: #D5DCE3; --accent: #2B4C7E; --accent-soft: #E3EAF5; --up: #C8322A; --up-soft: #F8E1DF;
  --down: #1C7F52; --down-soft: #DDF0E6;
  --font-display: "Noto Serif TC", "Songti TC", serif;
  --font-body: "Noto Sans TC", "PingFang TC", "Heiti TC", sans-serif;
  --font-data: "IBM Plex Mono", ui-monospace, "SF Mono", Menlo, monospace;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --ground: #0E1318; --surface: #161D25; --sunken: #1B232C; --ink: #E4E9EE; --muted: #93A0AE;
    --faint: #2A3440; --accent: #8FB0E3; --accent-soft: #1F2C40; --up: #F0766B; --up-soft: #3A1E1D;
    --down: #52C08C; --down-soft: #16301F;
  }
}
:root[data-theme="dark"] {
  --ground: #0E1318; --surface: #161D25; --sunken: #1B232C; --ink: #E4E9EE; --muted: #93A0AE;
  --faint: #2A3440; --accent: #8FB0E3; --accent-soft: #1F2C40; --up: #F0766B; --up-soft: #3A1E1D;
  --down: #52C08C; --down-soft: #16301F;
}
* { box-sizing: border-box; }
[hidden] { display: none !important; }
body { margin: 0; background: var(--ground); color: var(--ink); font-family: var(--font-body); font-size: 15px; line-height: 1.6; }
button, input { font: inherit; color: inherit; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.wrap { max-width: 420px; margin: 0 auto; padding: 48px 16px; display: grid; gap: 20px; }
.wrap.wide { max-width: 760px; }
h1 { font-family: var(--font-display); font-size: 28px; line-height: 1.2; margin: 0; }
.card { background: var(--surface); border: 1px solid var(--faint); border-radius: 12px; padding: 20px; display: grid; gap: 14px; }
label { display: grid; gap: 4px; font-size: 13px; color: var(--muted); }
input { width: 100%; padding: 9px 12px; border: 1px solid var(--faint); border-radius: 8px; background: var(--sunken); }
.btn { padding: 10px 16px; border: 0; border-radius: 8px; background: var(--accent); color: var(--surface); font-weight: 500; cursor: pointer; }
.btn:disabled { opacity: 0.6; cursor: default; }
.link { background: none; border: 0; padding: 0; color: var(--accent); cursor: pointer; text-decoration: none; }
.err { margin: 0; color: var(--up); font-size: 14px; }
.muted { color: var(--muted); font-size: 13px; }
.num { font-family: var(--font-data); font-variant-numeric: tabular-nums; }
table { width: 100%; border-collapse: collapse; font-size: 14px; }
th, td { text-align: left; padding: 8px 6px; border-bottom: 1px solid var(--faint); }
th { color: var(--muted); font-weight: 500; font-size: 13px; }
.scroll { overflow-x: auto; }
.up { color: var(--up); }
.down { color: var(--down); }
.r { text-align: right; }
nav.top { display: flex; flex-wrap: wrap; gap: 4px 16px; font-size: 14px; }
nav.top a { color: var(--accent); text-decoration: none; }
nav.top a[aria-current="page"] { color: var(--ink); font-weight: 700; }
.flag { display: inline-block; margin: 2px 4px 0 0; padding: 1px 8px; border-radius: 999px; background: var(--up-soft); color: var(--up); font-size: 12px; }
.note { white-space: pre-wrap; margin: 0; }
.stat { display: flex; flex-wrap: wrap; gap: 8px 24px; }
.stat b { font-family: var(--font-data); font-size: 20px; }
h2 { font-size: 17px; margin: 0; }