:root {
  --brand: #0284c7;
  --brand-dark: #0369a1;
  --qian-bg: #e0f2fe;
  --qian-fg: #0369a1;
  --qian-border: #7dd3fc;
  --kun-bg: #fce7f3;
  --kun-fg: #be185d;
  --kun-border: #f9a8d4;
  --ok-bg: #dcfce7;
  --ok-fg: #15803d;
  --warn-bg: #fffbeb;
  --warn-fg: #b45309;
  --warn-border: #fcd34d;
  --danger-bg: #fff1f2;
  --danger-fg: #dc2626;
  --danger-border: #fca5a5;
  --ui-border: #e2e8f0;
  --ui-border-strong: #cbd5e1;
  --ui-text: #0f172a;
  --ui-muted: #64748b;
  --ui-radius: 6px;
  --focus-ring: 0 0 0 3px rgba(2,132,199,.15);
  --page-max: 1440px;
  --pi: #0284c7;
  --pi-soft: #eff6ff;
  --pi-dark: #0c4a6e;
}

.app-page {
  max-width: var(--page-max);
  margin: 0 auto;
  padding: 16px 18px 32px;
}

.card-panel { border: 1px solid var(--ui-border); border-radius: 8px; background: #fff; }
.sr-only {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip-path: inset(50%) !important;
  white-space: nowrap !important;
  border: 0 !important;
}

/* 班務共用：數字卡（summary） */
.metric-row {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  margin: 14px 0;
}
.metric-card {
  background: #fff;
  border: 1px solid var(--ui-border);
  border-radius: 10px;
  padding: 14px 16px;
}
.metric-card .m-label {
  color: #64748b;
  font-size: .85rem;
  font-weight: 700;
}
.metric-card .m-value {
  margin-top: 5px;
  font-size: 1.5rem;
  font-weight: 900;
  color: #0f172a;
  line-height: 1.15;
  font-variant-numeric: tabular-nums;
}
.metric-card .m-value small {
  font-size: .8rem;
  font-weight: 700;
  color: #94a3b8;
}
.metric-card.warn .m-value { color: #b45309; }
.metric-card.good .m-value { color: #15803d; }

/* 班務共用：班級切換條 */
.class-switch {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  margin: 12px 0;
  padding: 10px 14px;
  background: #fff;
  border: 1px solid var(--ui-border);
  border-radius: 10px;
}
.class-switch .cs-label {
  color: #64748b;
  font-size: .85rem;
  font-weight: 700;
}
.class-switch .cs-name {
  font-size: 1.05rem;
  font-weight: 800;
  color: #0f172a;
}
.class-switch .cs-actions {
  margin-left: auto;
  display: flex;
  gap: 8px;
}
.class-switch .cs-btn,
.cs-btn {
  min-height: 38px;
  padding: 0 13px;
  border: 1px solid var(--ui-border-strong);
  border-radius: 7px;
  background: #fff;
  color: #334155;
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  cursor: pointer;
  text-decoration: none;
}
.class-switch .cs-btn:hover,
.cs-btn:hover {
  background: #f8fafc;
  border-color: #94a3b8;
}

.pi-setup { --pi: #0284c7; --pi-soft: #eff6ff; --pi-dark: #0c4a6e; }
.pi-schedule { --pi: #0d9488; --pi-soft: #f0fdfa; --pi-dark: #134e4a; }
.pi-attend { --pi: #d97706; --pi-soft: #fffbeb; --pi-dark: #7c2d12; }
.pi-report { --pi: #16a34a; --pi-soft: #f0fdf4; --pi-dark: #14532d; }
.pi-template { --pi: #7c3aed; --pi-soft: #f5f3ff; --pi-dark: #5b21b6; }
.pi-lecturer { --pi: #7c3aed; --pi-soft: #f5f3ff; --pi-dark: #5b21b6; }
.pi-makeup { --pi: #4f46e5; --pi-soft: #eef2ff; --pi-dark: #3730a3; }
.pi-class { --pi: #1e40af; --pi-soft: #eff6ff; --pi-dark: #1e3a8a; }
.pi-people { --pi: #0284c7; --pi-soft: #eff6ff; --pi-dark: #0c4a6e; }
.pi-activity { --pi: #0d9488; --pi-soft: #f0fdfa; --pi-dark: #134e4a; }

table.mode-qian thead th {
  background: var(--qian-bg) !important;
  color: var(--qian-fg) !important;
  border-bottom: 2px solid var(--qian-border) !important;
}
table.mode-kun thead th {
  background: var(--kun-bg) !important;
  color: var(--kun-fg) !important;
  border-bottom: 2px solid var(--kun-border) !important;
}
table.mode-all thead th {
  background: #f8fafc !important;
  color: #475569 !important;
  border-bottom: 2px solid var(--ui-border-strong) !important;
}

.segments button.btn-qian.active {
  background: var(--qian-bg);
  color: var(--qian-fg);
  box-shadow: inset 0 0 0 1px var(--qian-border);
}
.segments button.btn-kun.active {
  background: var(--kun-bg);
  color: var(--kun-fg);
  box-shadow: inset 0 0 0 1px var(--kun-border);
}

.icon-btn {
  width: 36px;
  height: 36px;
  padding: 0;
  border: 1px solid var(--ui-border-strong);
  border-radius: 6px;
  background: #fff;
  color: var(--ui-muted);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 1.05rem;
  transition: .2s;
}
.icon-btn:hover { background: #f1f5f9; color: var(--ui-text); border-color: #94a3b8; }
.icon-btn.danger { color: var(--danger-fg); border-color: var(--danger-border); background: var(--danger-bg); }
.icon-btn.archive { color: var(--warn-fg); border-color: var(--warn-border); background: #fffbeb; }
.icon-btn.restore { color: #10b981; border-color: #6ee7b7; background: #ecfdf5; }

.page-btn {
  height: 34px;
  padding: 0 14px;
  border: 1px solid var(--ui-border-strong);
  border-radius: 6px;
  background: #fff;
  color: #475569;
  font-weight: 700;
  font-size: .9rem;
  cursor: pointer;
}
.page-btn:hover:not(:disabled) { background: #f8fafc; }
.page-btn:disabled { opacity: .45; cursor: default; }

.readonly-pill {
  display: inline-flex;
  align-items: center;
  padding: 4px 10px;
  border: 1px solid var(--ui-border-strong);
  border-radius: 999px;
  background: #f1f5f9;
  color: #475569;
  font-size: .78rem;
  font-weight: 800;
  white-space: nowrap;
}

.search-input {
  flex: 1 1 220px;
  min-width: 160px;
  height: 38px;
  padding: 0 12px;
  border: 1px solid var(--ui-border-strong);
  border-radius: 8px;
  background: #f8fafc;
  font-size: .95rem;
  color: var(--ui-text);
}
.search-input:focus {
  outline: none;
  background: #fff;
  border-color: var(--brand);
  box-shadow: var(--focus-ring);
}
.search-input::placeholder { color: #94a3b8; }

.pill, .tag { display: inline-flex; align-items: center; gap: 4px; border-radius: 999px; font-weight: 700; }
.pill.ok, .tag.ok { background: var(--ok-bg); color: var(--ok-fg); }
.pill.warn, .tag.warn { background: #fef3c7; color: var(--warn-fg); }
.pill.bad, .tag.bad { background: #fee2e2; color: #b91c1c; }
.pill.muted, .tag.muted { background: #f1f5f9; color: var(--ui-muted); }
.pill.qian, .tag.qian { border: 1px solid var(--qian-border); background: var(--qian-bg); color: var(--qian-fg); }
.pill.kun, .tag.kun { border: 1px solid var(--kun-border); background: var(--kun-bg); color: var(--kun-fg); }

.btn.archive { border-color: #f59e0b; background: #fffbeb; color: var(--warn-fg); }
.btn.danger { border-color: var(--danger-fg); background: var(--danger-fg); color: #fff; }

@media (max-width: 760px) {
  .app-page { padding: 12px 12px 82px; }
  .metric-row { grid-template-columns: 1fr 1fr; }
  .class-switch { flex-direction: column; align-items: stretch; }
  .class-switch .cs-actions { margin-left: 0; }
  .class-switch .cs-btn { flex: 1; justify-content: center; }
  .search-input,
  .search {
    flex: 0 0 auto !important;
    width: 100%;
    height: 40px;
    min-height: 40px;
  }
}
@media (max-width: 768px) {
  .icon-btn { width: 44px; height: 44px; font-size: 1.2rem; }
}