:root {
  color-scheme: light;
  --ink: #182033;
  --muted: #647086;
  --line: #d8e2f0;
  --blue: #0b3b75;
  --blue-2: #10224a;
  --green: #008f7a;
  --gold: #b8872f;
  --soft: #f5f8fc;
}

* { box-sizing: border-box; }
html, body { margin: 0; min-height: 100%; }
body {
  font-family: "Microsoft JhengHei", "PingFang TC", "Segoe UI", sans-serif;
  color: var(--ink);
  background: linear-gradient(135deg, rgba(11,59,117,.96), rgba(16,34,74,.94));
}
body.modal-open { overflow: hidden; }
.app {
  width: min(1080px, calc(100% - 28px));
  margin: 0 auto;
  padding: 24px 0 38px;
}
.hero, .panel {
  background: rgba(255,255,255,.98);
  border: 1px solid rgba(255,255,255,.7);
  border-radius: 8px;
  box-shadow: 0 18px 58px rgba(0,0,0,.2);
}
.hero {
  padding: 26px;
  border-top: 5px solid var(--gold);
}
.eyebrow {
  color: var(--gold);
  font-size: 12px;
  font-weight: 900;
  letter-spacing: .12em;
  text-transform: uppercase;
}
h1, h2, p { margin-top: 0; }
h1 { font-size: clamp(32px, 6vw, 56px); margin-bottom: 8px; letter-spacing: 0; }
h2 { font-size: 24px; margin-bottom: 14px; }
p { color: var(--muted); line-height: 1.7; }
.tabs {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
  margin: 16px 0;
}
button {
  border: 0;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--blue), var(--blue-2));
  color: white;
  cursor: pointer;
  font: inherit;
  font-weight: 900;
  padding: 14px 16px;
}
button:disabled { opacity: .55; cursor: wait; }
button.danger { background: linear-gradient(135deg, #b42318, #7a271a); }
.tab { background: rgba(255,255,255,.18); border: 1px solid rgba(255,255,255,.28); }
.tab.active { background: linear-gradient(135deg, var(--green), #0b6f62); }
.view { display: none; }
.view.active { display: block; }
.grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 440px);
  gap: 16px;
}
.panel { padding: 24px; }
.benefits {
  display: grid;
  gap: 12px;
  padding: 0;
  margin: 0 0 18px;
  line-height: 1.65;
  list-style: none;
}
.benefits li {
  display: grid;
  grid-template-columns: 46px minmax(0, 1fr);
  gap: 12px;
  align-items: start;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: linear-gradient(135deg, #ffffff, var(--soft));
  font-size: 17px;
}
.benefits strong {
  display: block;
  margin-bottom: 3px;
  color: var(--blue);
  font-size: 18px;
}
.benefit-icon {
  display: grid;
  width: 46px;
  height: 46px;
  place-items: center;
  border-radius: 12px;
  background: #eaf2ff;
  font-size: 25px;
}
.course-meta {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}
.course-meta div, .session-list div, .stat, .roster-card {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--soft);
  padding: 12px;
}
.course-meta strong, .course-meta span, .session-list strong, .session-list span, .session-list small {
  display: block;
}
.course-meta strong { color: var(--blue); font-size: 13px; }
.course-meta span, .session-list span { color: var(--muted); margin-top: 5px; line-height: 1.45; }
.session-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
  margin-top: 22px;
}
.session-list small { color: var(--gold); margin-top: 5px; font-weight: 900; }
.form { display: grid; gap: 13px; }
.narrow { max-width: 520px; margin: 0 auto; }
label { display: grid; gap: 7px; font-weight: 900; font-size: 14px; }
input, select {
  width: 100%;
  border: 2px solid #e5e9f0;
  border-radius: 8px;
  padding: 13px 14px;
  font: inherit;
  background: white;
}
input:focus, select:focus { outline: none; border-color: var(--blue); }
.message { min-height: 24px; margin: 0; font-weight: 900; }
.message.ok { color: var(--green); }
.message.err { color: #d92d20; }
.form-hint {
  margin: -4px 0 2px;
  font-size: 14px;
}
.success {
  max-width: 520px;
  margin: 16px auto 0;
  text-align: center;
}
.inline-success {
  max-width: none;
  margin: 14px 0;
  padding: 16px;
  border: 1px solid #b8ead7;
  border-radius: 8px;
  background: #f0fff9;
}
.inline-success .ok {
  width: 54px;
  height: 54px;
  font-size: 34px;
}
.inline-success h2 {
  margin-bottom: 6px;
}
.inline-success p {
  margin-bottom: 12px;
}
.ok {
  width: 74px;
  height: 74px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  margin: 0 auto 14px;
  background: #e8fff7;
  color: var(--green);
  font-size: 46px;
  font-weight: 900;
}
.roster-head, .bottom-stats-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 12px;
}
.roster-actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 8px;
  flex-wrap: wrap;
}
.sheet-link {
  display: inline-flex;
  align-items: center;
  min-height: 42px;
  border-radius: 8px;
  padding: 10px 12px;
  background: var(--green);
  color: #fff;
  text-decoration: none;
  font-size: 14px;
  font-weight: 900;
}
.roster, .stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}
.roster-card { padding: 14px; }
.roster-card h3 { margin: 0 0 10px; }
.person {
  padding: 9px 0;
  border-top: 1px solid #e5edf8;
  font-size: 14px;
}
.person span {
  margin-left: 8px;
  color: var(--green);
  font-weight: 900;
}
.person em {
  display: inline-flex;
  margin-left: 8px;
  padding: 2px 7px;
  border-radius: 999px;
  background: #e8f1ff;
  color: var(--blue);
  font-size: 12px;
  font-style: normal;
  font-weight: 900;
}
.person small { display: block; color: var(--muted); margin-top: 3px; }
.person.cancelled {
  opacity: .68;
}
.person.cancelled strong {
  text-decoration: line-through;
}
.person.cancelled span {
  color: #b42318;
}
.stat strong { display: block; font-size: 28px; color: var(--blue); }
.stat span { font-size: 13px; color: var(--muted); }
.stat small { display: block; margin-top: 4px; color: var(--gold); font-weight: 900; }
.stat-button {
  width: 100%;
  text-align: left;
  background: var(--soft);
  color: var(--ink);
  cursor: pointer;
  transition: transform .16s ease, box-shadow .16s ease, border-color .16s ease;
}
.stat-button:hover,
.stat-button:focus-visible {
  transform: translateY(-2px);
  border-color: rgba(0,143,122,.45);
  box-shadow: 0 10px 24px rgba(0,0,0,.12);
  outline: none;
}
.stat-total {
  grid-column: 1 / -1;
  background: linear-gradient(135deg, rgba(0,143,122,.12), rgba(11,59,117,.08));
  border-color: rgba(0,143,122,.38);
}
.stat-total strong { color: var(--green); }
.stat-total-toggle {
  width: 100%;
  color: var(--ink);
  text-align: left;
  cursor: pointer;
  transition: transform .16s ease, box-shadow .16s ease, border-color .16s ease;
}
.stat-total-toggle:hover,
.stat-total-toggle:focus-visible {
  transform: translateY(-2px);
  border-color: rgba(0,143,122,.56);
  box-shadow: 0 10px 24px rgba(0,0,0,.12);
  outline: none;
}
.stat-total-toggle .stat-total-action {
  display: inline-flex;
  margin-top: 8px;
  color: var(--green);
  font-weight: 900;
}
.checkin-stats-collapsed .stat-total-toggle .stat-total-action {
  color: var(--gold);
}
.toggle-checkin-stats {
  min-height: 42px;
  padding: 10px 12px;
  border-radius: 8px;
  background: var(--green);
  color: #fff;
  font-size: 14px;
  font-weight: 900;
  white-space: nowrap;
}
.checkin-stats-collapsed .checkin-breakdown {
  display: none;
}
.city-checkin-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 8px;
  margin-top: 12px;
}
.city-checkin-item {
  display: block;
  padding: 10px;
  border: 1px solid rgba(0,143,122,.18);
  border-radius: 8px;
  background: rgba(255,255,255,.7);
}
.city-checkin-item strong {
  font-size: 16px;
  color: var(--ink);
}
.city-checkin-item small {
  color: var(--gold);
}
.bottom-stats { margin-top: 16px; }
.bottom-stats-head h2, .bottom-stats-head p { margin-bottom: 0; }
.stats-hint {
  margin: -4px 0 12px;
  font-size: 14px;
}
.modal[hidden] { display: none; }
.modal {
  position: fixed;
  inset: 0;
  z-index: 50;
  display: grid;
  place-items: center;
  padding: 18px;
}
.modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(11, 21, 40, .68);
  backdrop-filter: blur(6px);
}
.modal-card {
  position: relative;
  z-index: 1;
  width: min(560px, 100%);
  max-height: min(84vh, 720px);
  overflow: auto;
  padding: 26px;
  text-align: center;
  background: #fff;
  border-radius: 12px;
  box-shadow: 0 24px 80px rgba(0,0,0,.36);
}
.modal-close {
  position: absolute;
  top: 10px;
  right: 10px;
  width: 38px;
  height: 38px;
  padding: 0;
  border-radius: 999px;
  background: #eef3f8;
  color: var(--ink);
  font-size: 24px;
  line-height: 1;
}
.modal-ok {
  width: 64px;
  height: 64px;
  font-size: 40px;
}
.modal-card h2 {
  margin-bottom: 8px;
}
.modal-card p {
  margin-bottom: 14px;
}
.modal-body {
  text-align: left;
}
.modal-list {
  display: grid;
  gap: 8px;
  margin: 16px 0 4px;
}
.modal-person {
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--soft);
}
.modal-person strong,
.modal-person span,
.modal-person small {
  display: block;
}
.modal-person span {
  margin-top: 4px;
  color: var(--green);
  font-size: 14px;
  font-weight: 900;
}
.modal-person small {
  margin-top: 3px;
  color: var(--muted);
  font-size: 12px;
}
.modal-empty {
  text-align: center;
}
.modal-action {
  margin-top: 16px;
  min-width: 132px;
}
.staff-app {
  max-width: 920px;
}
.staff-hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 12px;
}
.staff-hero h1 {
  margin-bottom: 6px;
}
.staff-hero p {
  margin-bottom: 0;
}
.staff-toolbar {
  display: grid;
  grid-template-columns: 180px 150px minmax(220px, 1fr) auto;
  align-items: end;
  gap: 12px;
  margin: 16px 0;
}
.staff-stats {
  margin-bottom: 12px;
}
.staff-list {
  display: grid;
  gap: 8px;
}
.staff-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 104px;
  align-items: center;
  gap: 12px;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--soft);
}
.staff-row strong,
.staff-row span {
  display: block;
}
.staff-row span {
  margin-top: 4px;
  color: var(--muted);
  font-size: 13px;
}
.staff-row.done {
  background: #eefaf6;
}
.staff-row.done strong {
  color: var(--green);
}
.staff-row button {
  min-height: 44px;
  padding: 10px 12px;
}
.quick-checkin,
.checkin-panel {
  max-width: 860px;
  margin: 0 auto;
}
.quick-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 12px;
}
.quick-head h2,
.quick-head p {
  margin-bottom: 0;
}
.quick-controls {
  display: grid;
  grid-template-columns: 220px minmax(220px, 1fr);
  gap: 12px;
  margin-bottom: 12px;
}
.checkin-form {
  grid-template-columns: 150px minmax(180px, 1fr) minmax(220px, 1.3fr);
  align-items: end;
  margin-bottom: 12px;
}
.checkin-form label:nth-of-type(4),
.checkin-form .message {
  grid-column: 1 / -1;
}
.checkin-form button {
  min-height: 50px;
}
.quick-list {
  display: grid;
  gap: 8px;
  max-height: 560px;
  overflow: auto;
  padding-right: 3px;
}
.undo-checkin {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin: 6px 0 12px;
  padding: 12px;
  border: 1px solid #ffd3c8;
  border-radius: 8px;
  background: #fff4f0;
}
.undo-checkin span {
  color: #7a271a;
  font-weight: 900;
}
.undo-checkin button {
  min-height: 42px;
  padding: 10px 12px;
}
.undo-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

@media (max-width: 760px) {
  .app { width: min(100% - 22px, 1080px); padding-top: 12px; }
  .grid, .course-meta, .roster, .stats { grid-template-columns: 1fr; }
  .city-checkin-grid { grid-template-columns: 1fr; }
  .toggle-checkin-stats { width: 100%; }
  .panel, .hero { padding: 18px; }
  .tabs { grid-template-columns: repeat(2, 1fr); gap: 6px; }
  .tab { padding: 12px 8px; }
  h1 { font-size: 34px; }
  .roster-head, .bottom-stats-head { align-items: flex-start; flex-direction: column; }
  .staff-hero,
  .staff-toolbar,
  .staff-row {
    grid-template-columns: 1fr;
  }
  .staff-row button {
    width: 100%;
  }
  .quick-head {
    align-items: stretch;
    flex-direction: column;
  }
  .quick-controls,
  .checkin-form {
    grid-template-columns: 1fr;
  }
  .checkin-form label:nth-of-type(4),
  .checkin-form .message {
    grid-column: auto;
  }
  .undo-checkin {
    align-items: stretch;
    flex-direction: column;
  }
  .undo-actions {
    align-items: stretch;
    flex-direction: column;
  }
}