:root {
  --brand-maroon: #6b2d5b;
  --brand-gold: #c4975c;
  --brand-dark-slate: #2c3e50;
  --surface-white: #ffffff;
  --surface-ivory: #f8f6f3;
  --surface-sand: #efe9e2;
  --border-light: #e2ded8;
  --text-dark: #2b2b2b;
  --text-muted: #6a6762;
  --status-called: #4caf50;
  --status-waiting: #d8d4cd;
  --status-danger: #b02a37;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  font-family: "Open Sans", "Segoe UI", Tahoma, sans-serif;
  color: var(--text-dark);
  background: var(--surface-ivory);
}

.brand-bar {
  width: 100%;
  background: var(--brand-maroon);
  color: #fff;
  padding: 10px 16px;
  font-family: "Playfair Display", Georgia, serif;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  font-size: 0.9rem;
}

.page {
  max-width: 1100px;
  margin: 0 auto;
  padding: 20px 16px 32px;
}

.card {
  background: var(--surface-white);
  border: 1px solid var(--border-light);
  border-radius: 12px;
  padding: 16px;
}

h1,
h2,
h3 {
  margin-top: 0;
  font-family: "Playfair Display", Georgia, serif;
}

h1 {
  font-size: 1.8rem;
}

.muted {
  color: var(--text-muted);
}

.btn,
button {
  border: 1px solid transparent;
  border-radius: 10px;
  padding: 11px 14px;
  font-size: 1rem;
  cursor: pointer;
}

.btn-primary {
  background: var(--brand-maroon);
  color: #fff;
}

.btn-secondary {
  background: #fff;
  color: var(--text-dark);
  border-color: var(--border-light);
}

.btn-accent {
  background: var(--brand-gold);
  color: #1f1f1f;
}

input,
select,
textarea {
  width: 100%;
  border: 1px solid var(--border-light);
  border-radius: 10px;
  padding: 10px 12px;
  font-size: 1rem;
  background: #fff;
}

.form-row {
  display: grid;
  gap: 10px;
}

.stack {
  display: grid;
  gap: 12px;
}

.inline {
  display: flex;
  gap: 10px;
  align-items: center;
  flex-wrap: wrap;
}

.status {
  display: inline-block;
  font-size: 0.85rem;
  padding: 4px 8px;
  border-radius: 999px;
  border: 1px solid var(--border-light);
}

.status-called {
  background: #e8f7ea;
  color: #246628;
}

.status-waiting {
  background: #f3f1ed;
  color: #5e5a55;
}

.error {
  color: var(--status-danger);
  font-weight: 600;
}

.success {
  color: #1e6a23;
  font-weight: 600;
}

.hidden {
  display: none !important;
}

.grid {
  display: grid;
  gap: 12px;
}

.grid-classes {
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
}

.class-card {
  text-align: center;
  padding: 16px;
  border: 1px solid var(--border-light);
  border-radius: 12px;
  background: #fff;
  cursor: pointer;
}

.class-card.complete {
  opacity: 0.5;
}

.student-grid {
  grid-template-columns: repeat(auto-fill, minmax(190px, 1fr));
}

.student-card {
  min-height: 88px;
  border-radius: 12px;
  border: 1px solid transparent;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  font-weight: 700;
  padding: 10px;
}

.student-card.waiting {
  background: var(--status-waiting);
  color: #312f2c;
}

.student-card.called {
  background: var(--status-called);
  color: #fff;
}

.table-wrap {
  overflow: auto;
  border: 1px solid var(--border-light);
  border-radius: 12px;
  background: #fff;
}

table {
  width: 100%;
  border-collapse: collapse;
}

th,
td {
  border-bottom: 1px solid var(--border-light);
  padding: 10px;
  text-align: left;
  vertical-align: top;
}

th {
  background: #f4f1ec;
}

.projector {
  min-height: 100vh;
  background: var(--brand-dark-slate);
  color: #fff;
}

.projector .page {
  max-width: none;
}

.projector h1 {
  color: #fff;
  margin-bottom: 18px;
}

.projector .student-card.waiting {
  background: #4b6075;
  color: #fff;
}

.projector .student-card.called {
  background: var(--status-called);
}

.admin-header {
  background: linear-gradient(145deg, #fff, #f7f1ea);
}

.admin-header-row {
  justify-content: space-between;
}

.tab-list {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.tab-btn {
  border: 1px solid var(--border-light);
  background: #fff;
  color: var(--text-dark);
  border-radius: 999px;
  padding: 8px 14px;
  font-size: 0.95rem;
}

.tab-btn.active {
  background: var(--brand-maroon);
  color: #fff;
  border-color: var(--brand-maroon);
}

.kpi-grid {
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
}

.kpi-value {
  margin: 0;
  font-family: "Playfair Display", Georgia, serif;
  font-size: 2rem;
  line-height: 1;
  color: var(--brand-dark-slate);
}

.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(22, 17, 12, 0.48);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
  z-index: 50;
}

.modal-card {
  width: min(700px, 100%);
  max-height: 90vh;
  overflow: auto;
  background: #fff;
  border: 1px solid var(--border-light);
  border-radius: 14px;
  padding: 16px;
}

@media (max-width: 640px) {
  .page {
    padding: 16px 12px 24px;
  }

  h1 {
    font-size: 1.4rem;
  }

  .btn,
  button,
  input,
  select,
  textarea {
    font-size: 1rem;
  }

  .admin-header-row {
    flex-direction: column;
    align-items: stretch;
  }

  .tab-list {
    overflow-x: auto;
    flex-wrap: nowrap;
    padding-bottom: 2px;
  }

  .tab-btn {
    white-space: nowrap;
  }
}