:root {
  color-scheme: light;
  --navy: #0b1f3a;
  --green: #166534;
  --green-light: #dcfce7;
  --paper: #f3f6f8;
  --white: #fff;
  --muted: #5b6b7f;
  --line: #d9e1e8;
  --danger: #b42318;
  --warning: #9a6700;
  font-family: Inter, "Noto Sans TC", system-ui, sans-serif;
}

* { box-sizing: border-box; }
body { margin: 0; background: var(--paper); color: var(--navy); }
button, input, select, textarea { font: inherit; }
button {
  border: 0;
  border-radius: 0.45rem;
  padding: 0.72rem 1rem;
  background: var(--green);
  color: var(--white);
  font-weight: 700;
  cursor: pointer;
}
button:hover { filter: brightness(0.92); }
button.secondary { background: var(--navy); }
button.danger { background: var(--danger); }
button:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible {
  outline: 3px solid #4ade80;
  outline-offset: 2px;
}
.topbar {
  display: flex;
  justify-content: space-between;
  gap: 2rem;
  padding: 2rem max(1rem, calc((100% - 1180px) / 2));
  color: var(--white);
  background: var(--navy);
}
.topbar h1 { margin: 0.2rem 0; font-size: clamp(1.6rem, 4vw, 2.5rem); }
.topbar p { margin: 0; }
.eyebrow { margin: 0; color: #4ade80; font-size: 0.75rem; font-weight: 800; letter-spacing: 0.12em; }
.policy-badge { align-self: center; padding: 0.7rem 0.9rem; border: 1px solid #4ade80; border-radius: 999px; }
main { max-width: 1180px; margin: 0 auto; padding: 1.5rem 1rem 4rem; }
.token-panel, .section-heading, .actions, .workflow-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}
.token-panel {
  margin-bottom: 1rem;
  padding: 0.8rem;
  background: #fff8c5;
  border: 1px solid #eac54f;
  border-radius: 0.6rem;
}
.token-panel label { flex: 1; }
.token-panel input { margin-top: 0; }
.notice { margin: 1rem 0; padding: 0.9rem; border-radius: 0.5rem; background: var(--green-light); }
.notice.is-error { color: var(--danger); background: #fee4e2; }
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1rem; margin: 1rem 0; }
.stat, .card {
  padding: 1.15rem;
  border: 1px solid var(--line);
  border-radius: 0.7rem;
  background: var(--white);
  box-shadow: 0 8px 24px rgba(11, 31, 58, 0.05);
}
.stat strong { display: block; margin-top: 0.35rem; font-size: 1.7rem; }
.stat span, .footnote, time { color: var(--muted); font-size: 0.82rem; }
.tabs { display: flex; gap: 0.4rem; overflow-x: auto; margin: 1.5rem 0 1rem; border-bottom: 1px solid var(--line); }
.tabs button { flex: 0 0 auto; background: transparent; color: var(--muted); border-radius: 0; }
.tabs button.is-active { color: var(--navy); border-bottom: 3px solid var(--green); }
.tabs span { display: inline-grid; place-items: center; min-width: 1.4rem; height: 1.4rem; margin-left: 0.3rem; border-radius: 999px; background: var(--green-light); }
.panel { display: none; }
.panel.is-active { display: block; }
.grid-two, .grid-three { display: grid; gap: 1rem; }
.grid-two { grid-template-columns: repeat(2, 1fr); }
.grid-three { grid-template-columns: repeat(3, 1fr); }
.stack { display: grid; gap: 1rem; }
.card h2, .card h3 { margin-top: 0; }
label { display: grid; gap: 0.35rem; margin-bottom: 0.9rem; color: var(--muted); font-size: 0.85rem; font-weight: 700; }
input, select, textarea {
  width: 100%;
  padding: 0.72rem;
  color: var(--navy);
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 0.4rem;
}
textarea { resize: vertical; }
.section-heading { margin-bottom: 1rem; }
.status {
  display: inline-block;
  margin-bottom: 0.5rem;
  padding: 0.3rem 0.55rem;
  color: var(--green);
  background: var(--green-light);
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 800;
}
.workflow-location { margin: 0.35rem 0 0.8rem; color: var(--navy); font-weight: 700; }
.escalation { margin: 0.8rem 0; padding: 0.8rem; color: var(--warning); background: #fff8c5; border-left: 4px solid #d4a72c; }
.actions { justify-content: flex-start; flex-wrap: wrap; }
.table-wrap { overflow-x: auto; margin-bottom: 1.5rem; }
table { width: 100%; border-collapse: collapse; background: var(--white); }
th, td { padding: 0.8rem; text-align: left; border-bottom: 1px solid var(--line); }
.empty { padding: 2rem; text-align: center; color: var(--muted); background: var(--white); border: 1px dashed var(--line); }
.today-section { margin-bottom: 1.5rem; padding: 1.15rem; background: var(--navy); color: var(--white); border-radius: 0.75rem; }
.today-section .empty { color: #d9e1e8; background: rgba(255, 255, 255, 0.08); border-color: rgba(255, 255, 255, 0.2); }
.today-date { align-self: center; color: #4ade80; }
.today-list { display: grid; gap: 0.65rem; }
.calendar-card, .selected-day {
  margin-bottom: 1.5rem;
  padding: 1.15rem;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 0.75rem;
}
.calendar-toolbar {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1rem;
}
.calendar-toolbar h2 { margin: 0.2rem 0 0; }
.calendar-toolbar-actions { display: flex; gap: 0.5rem; }
.calendar-arrow { min-width: 2.8rem; font-size: 1.35rem; }
.calendar-weekdays, .calendar-grid {
  display: grid;
  grid-template-columns: repeat(7, minmax(0, 1fr));
}
.calendar-weekdays span { padding: 0.5rem; color: var(--muted); text-align: center; font-size: 0.78rem; font-weight: 800; }
.calendar-grid { border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.calendar-day {
  min-width: 0;
  min-height: 96px;
  padding: 0.5rem;
  color: var(--navy);
  background: var(--white);
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  border-radius: 0;
  text-align: left;
  overflow: hidden;
}
.calendar-day:hover { background: #f7fafb; filter: none; }
.calendar-day.is-empty { background: var(--paper); }
.calendar-day.is-today .calendar-day-number {
  display: inline-grid;
  place-items: center;
  width: 1.75rem;
  height: 1.75rem;
  color: var(--white);
  background: var(--green);
  border-radius: 999px;
}
.calendar-day.is-selected { box-shadow: inset 0 0 0 3px var(--green); }
.calendar-day-number { display: block; font-weight: 800; }
.calendar-events { display: grid; gap: 0.25rem; margin-top: 0.4rem; }
.calendar-event {
  display: block;
  padding: 0.2rem 0.3rem;
  overflow: hidden;
  color: var(--green);
  background: var(--green-light);
  border-radius: 0.25rem;
  font-size: 0.68rem;
  font-weight: 700;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.calendar-event-count { display: none; color: var(--green); font-size: 0.65rem; font-weight: 800; }
.calendar-lesson {
  display: grid;
  grid-template-columns: 4.2rem 1fr;
  gap: 0.85rem;
  align-items: start;
  padding: 0.9rem;
  color: var(--navy);
  background: var(--white);
  border: 1px solid var(--line);
  border-left: 4px solid var(--green);
  border-radius: 0.55rem;
}
.calendar-lesson time { color: var(--green); font-size: 1rem; font-weight: 900; }
.calendar-lesson p { margin: 0.25rem 0 0; color: var(--muted); font-size: 0.82rem; }
.calendar-lesson.is-cancelled { opacity: 0.58; border-left-color: var(--danger); text-decoration: line-through; }

@media (max-width: 760px) {
  .topbar, .token-panel, .section-heading, .workflow-head { align-items: stretch; flex-direction: column; }
  .stats, .grid-two, .grid-three { grid-template-columns: 1fr; }
  .policy-badge { align-self: flex-start; }
  .today-date { align-self: flex-start; }
  .calendar-card, .selected-day { padding: 0.65rem; }
  .calendar-toolbar { grid-template-columns: auto 1fr auto; gap: 0.45rem; }
  .calendar-toolbar-actions [data-calendar-today] { display: none; }
  .calendar-toolbar h2 { font-size: 1.15rem; }
  .calendar-weekdays span { padding: 0.35rem 0; }
  .calendar-day { min-height: 58px; padding: 0.3rem; text-align: center; }
  .calendar-day.is-today .calendar-day-number { width: 1.5rem; height: 1.5rem; margin: 0 auto; }
  .calendar-events { display: none; }
  .calendar-event-count { display: block; margin-top: 0.2rem; }
  .calendar-lesson { grid-template-columns: 3.6rem 1fr; padding: 0.75rem; }
}