:root {
  --bg: #f3f5f8;
  --card: #ffffff;
  --ink: #152033;
  --muted: #5c6b80;
  --line: #d7dee8;
  --accent: #8b1e2d;
  --accent-soft: #f8e8ea;
  --ok: #1f7a4d;
  --ok-soft: #e6f5ec;
  --warn: #9a6700;
  --warn-soft: #fff4d6;
  --miss: #b42318;
  --miss-soft: #fde8e6;
  --shadow: 0 8px 24px rgba(21, 32, 51, 0.06);
}
* { box-sizing: border-box; }
html, body { margin: 0; min-height: 100%; }
body {
  font-family: "Noto Sans TC", "Source Han Sans TC", "PingFang TC", "Microsoft JhengHei", system-ui, sans-serif;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.45;
}
.hidden { display: none !important; }
.eyebrow { margin: 0; color: var(--accent); font-size: 0.75rem; letter-spacing: 0.12em; text-transform: uppercase; }
h1 { margin: 0.15rem 0 0; font-size: 1.35rem; }
.sub, .status { color: var(--muted); font-size: 0.9rem; }
header {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 1rem;
  padding: 1rem 1.25rem 0.85rem;
  background: var(--card);
  border-bottom: 1px solid var(--line);
}
.header-actions { display: flex; align-items: center; gap: 0.6rem; flex-wrap: wrap; justify-content: flex-end; }
button, .btn {
  font: inherit;
  border: 1px solid var(--line);
  background: #fff;
  border-radius: 8px;
  padding: 0.45rem 0.8rem;
  cursor: pointer;
}
button.primary { background: var(--accent); color: #fff; border-color: var(--accent); }
button.ghost { background: transparent; }
button:disabled { opacity: 0.55; cursor: not-allowed; }
.tabs {
  display: flex;
  gap: 0.25rem;
  padding: 0.6rem 1.25rem 0;
  background: var(--card);
  border-bottom: 1px solid var(--line);
}
.tabs a {
  text-decoration: none;
  color: var(--muted);
  padding: 0.55rem 0.8rem;
  border-bottom: 2px solid transparent;
}
.tabs a.active { color: var(--accent); border-bottom-color: var(--accent); font-weight: 600; }
main { padding: 1rem 1.25rem 3rem; max-width: 1200px; margin: 0 auto; }
.kpis { display: grid; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); gap: 0.7rem; margin-bottom: 1rem; }
.kpi, .card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  box-shadow: var(--shadow);
}
.kpi { padding: 0.85rem 1rem; }
.kpi .n { font-size: 1.6rem; font-weight: 700; }
.kpi .l { color: var(--muted); font-size: 0.8rem; }
.toolbar { display: flex; gap: 0.6rem; flex-wrap: wrap; margin: 0 0 0.8rem; }
input[type="search"], input[type="password"], textarea, select {
  font: inherit;
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 0.55rem 0.7rem;
}
.toolbar input { max-width: 280px; }
.chips { display: flex; gap: 0.35rem; flex-wrap: wrap; }
.chip { font-size: 0.75rem; padding: 0.15rem 0.45rem; border-radius: 999px; }
.chip.ok { background: var(--ok-soft); color: var(--ok); }
.chip.warn { background: var(--warn-soft); color: var(--warn); }
.chip.miss { background: var(--miss-soft); color: var(--miss); }
table { width: 100%; border-collapse: collapse; background: var(--card); }
th, td { text-align: left; padding: 0.65rem 0.7rem; border-bottom: 1px solid var(--line); vertical-align: top; }
th { font-size: 0.8rem; color: var(--muted); font-weight: 600; }
tr.row { cursor: pointer; }
tr.row:hover { background: #f7f9fc; }
.table-wrap { overflow: auto; border: 1px solid var(--line); border-radius: 12px; background: var(--card); }
.cards { display: grid; gap: 0.7rem; }
.learner-card { padding: 0.9rem 1rem; cursor: pointer; }
.learner-card h2 { font-size: 1.05rem; margin: 0 0 0.35rem; }
.meta { color: var(--muted); font-size: 0.85rem; }
.back { margin-bottom: 0.8rem; }
.detail { display: grid; gap: 0.8rem; }
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 0.8rem; }
.pad { padding: 1rem 1.1rem; }
.pad h2 { margin: 0 0 0.6rem; font-size: 1.05rem; }
.score { font-size: 1.8rem; font-weight: 700; }
.orig { white-space: pre-wrap; background: #f7f9fc; padding: 0.8rem; border-radius: 8px; }
.banner { margin: 0; padding: 0.65rem 1.25rem; background: var(--warn-soft); color: var(--warn); }
.banner.ok { background: var(--ok-soft); color: var(--ok); }
.banner.err { background: var(--miss-soft); color: var(--miss); }
.gate {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 1.5rem;
}
.gate-card { width: min(420px, 100%); padding: 1.4rem; display: grid; gap: 0.7rem; }
.err { color: var(--miss); min-height: 1.2em; }
.counts { display: grid; gap: 0.35rem; }
.bar {
  height: 8px;
  background: #e8edf3;
  border-radius: 99px;
  overflow: hidden;
}
.bar > span { display: block; height: 100%; background: var(--accent); }
@media (max-width: 800px) {
  header { flex-direction: column; align-items: stretch; }
  .header-actions { justify-content: flex-start; }
  .grid-2 { grid-template-columns: 1fr; }
  .desktop-only { display: none; }
}
@media (min-width: 801px) {
  .mobile-only { display: none; }
}