*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --bg: #f5f6fa;
  --surface: #ffffff;
  --text: #2d3436;
  --text-light: #636e72;
  --primary: #0984e3;
  --available: #00b894;
  --available-bg: #e6fff9;
  --booked: #0984e3;
  --booked-bg: #dfe6e9;
  --permanent: #6c5ce7;
  --permanent-bg: #ede7f6;
  --danger: #d63031;
  --border: #dfe6e9;
  --radius: 8px;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
}

header {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 16px 24px;
  position: sticky;
  top: 0;
  z-index: 10;
}

header h1 {
  font-size: 1.4rem;
  margin-bottom: 12px;
}

.controls {
  display: flex;
  align-items: flex-end;
  gap: 12px;
  flex-wrap: wrap;
}

.control-group {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.control-group label {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-light);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.control-group input {
  padding: 8px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 0.9rem;
  outline: none;
  transition: border-color 0.2s;
}

.control-group input:focus {
  border-color: var(--primary);
}

#person-name {
  width: 180px;
}

.nav-btn {
  padding: 8px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  cursor: pointer;
  font-size: 0.9rem;
  transition: background 0.15s;
}

.nav-btn:hover {
  background: var(--bg);
}

main {
  margin: 24px auto;
  padding: 0 16px;
  max-width: 1200px;
}

.legend {
  display: flex;
  gap: 20px;
  margin-bottom: 20px;
  justify-content: center;
}

.legend-item {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.85rem;
  color: var(--text-light);
}

.swatch {
  width: 14px;
  height: 14px;
  border-radius: 3px;
}

.swatch.available {
  background: var(--available);
}

.swatch.booked {
  background: var(--booked);
}

.swatch.permanent {
  background: var(--permanent);
}

#desk-map {
  background: var(--surface);
  border-radius: 12px;
  padding: 12px;
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 12px;
}

.clusters-row {
  display: flex;
  gap: 8px;
  flex: 1;
  min-width: 0;
}

.cluster {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4px;
  padding: 5px;
  background: #f0f0f4;
  border-radius: 8px;
  flex: 1;
  min-width: 0;
}

.desk {
  width: 100%;
  aspect-ratio: 1.4;
  min-height: 0;
  background: var(--available-bg);
  border: 2px solid var(--available);
  border-radius: var(--radius);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: transform 0.15s, box-shadow 0.15s;
  position: relative;
  overflow: hidden;
}

.desk:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.desk.booked {
  background: var(--booked-bg);
  border-color: var(--booked);
}

.desk.permanent {
  background: var(--permanent-bg);
  border-color: var(--permanent);
}

.desk-num {
  font-size: 0.6rem;
  font-weight: 700;
  color: var(--text-light);
  position: absolute;
  top: 3px;
  left: 5px;
}

.desk-name {
  font-size: 0.7rem;
  font-weight: 600;
  text-align: center;
  padding: 0 3px;
  margin-top: 2px;
  word-break: break-word;
  line-height: 1.1;
}

.desk.permanent .desk-name::after {
  content: ' P';
  font-size: 0.6rem;
  background: var(--permanent);
  color: white;
  padding: 1px 4px;
  border-radius: 3px;
  margin-left: 3px;
  vertical-align: super;
}

.entrance {
  display: flex;
  align-items: center;
  justify-content: center;
  border-right: 3px double var(--border);
  padding-right: 12px;
  flex-shrink: 0;
  align-self: stretch;
}

.entrance span {
  writing-mode: vertical-rl;
  transform: rotate(180deg);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 3px;
  color: var(--text-light);
  white-space: nowrap;
}

#manage-permanent-btn {
  display: block;
  margin: 20px auto;
  padding: 10px 24px;
  background: var(--permanent);
  color: white;
  border: none;
  border-radius: var(--radius);
  cursor: pointer;
  font-size: 0.9rem;
  font-weight: 600;
  transition: opacity 0.15s;
}

#manage-permanent-btn:hover {
  opacity: 0.9;
}

/* Modals */

.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.4);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
}

.modal-overlay.hidden {
  display: none;
}

.modal {
  background: var(--surface);
  border-radius: 12px;
  padding: 24px;
  min-width: 320px;
  max-width: 90vw;
  max-height: 80vh;
  overflow-y: auto;
  position: relative;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.2);
}

.modal-wide {
  min-width: 400px;
}

.modal-close {
  position: absolute;
  top: 12px;
  right: 16px;
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--text-light);
  line-height: 1;
}

.modal h2 {
  margin-bottom: 16px;
  font-size: 1.2rem;
}

.modal p {
  margin-bottom: 10px;
  color: var(--text-light);
}

.modal-actions {
  display: flex;
  gap: 8px;
  margin-top: 16px;
}

.btn {
  padding: 8px 18px;
  border: none;
  border-radius: var(--radius);
  cursor: pointer;
  font-size: 0.85rem;
  font-weight: 600;
  transition: opacity 0.15s;
}

.btn:hover {
  opacity: 0.9;
}

.btn-primary {
  background: var(--primary);
  color: white;
}

.btn-danger {
  background: var(--danger);
  color: white;
}

.btn-secondary {
  background: var(--border);
  color: var(--text);
}

.btn-permanent {
  background: var(--permanent);
  color: white;
}

/* Permanent desks panel */

.permanent-form {
  display: flex;
  gap: 8px;
  margin-bottom: 20px;
  flex-wrap: wrap;
}

.permanent-form select,
.permanent-form input {
  padding: 8px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 0.9rem;
}

.permanent-form select {
  min-width: 120px;
}

.permanent-form input {
  flex: 1;
  min-width: 140px;
}

#perm-assign-btn {
  padding: 8px 18px;
  background: var(--permanent);
  color: white;
  border: none;
  border-radius: var(--radius);
  cursor: pointer;
  font-weight: 600;
}

.perm-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 8px;
}

.perm-item-info {
  font-size: 0.9rem;
}

.perm-item-info strong {
  color: var(--permanent);
}

.perm-item button {
  padding: 4px 12px;
  font-size: 0.8rem;
}

.perm-item-actions {
  display: flex;
  gap: 6px;
  align-items: center;
}

/* Absence modal */

.absence-add-heading {
  font-size: 1rem;
  margin-top: 20px;
  margin-bottom: 12px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
}

.absence-existing-list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 8px;
  max-height: 150px;
  overflow-y: auto;
  padding: 4px 0;
}

.absence-existing-empty {
  color: var(--text-light);
  font-size: 0.85rem;
  margin-bottom: 8px;
}

.absence-mode-toggle {
  display: flex;
  gap: 4px;
  margin-bottom: 14px;
}

.absence-mode-btn {
  padding: 6px 14px !important;
  font-size: 0.8rem !important;
  border: 1px solid var(--border) !important;
}

.absence-mode-btn.active {
  background: var(--primary) !important;
  color: white !important;
  border-color: var(--primary) !important;
}

.absence-form {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.absence-form.hidden {
  display: none;
}

.absence-row {
  display: flex;
  gap: 10px;
  align-items: flex-end;
}

.absence-row .control-group {
  flex: 1;
}

.absence-row input[type="date"] {
  padding: 8px 10px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 0.85rem;
  width: 100%;
}

.absence-preview {
  font-size: 0.8rem;
  color: var(--text-light);
  min-height: 1.2em;
}

.absence-hint {
  font-size: 0.8rem;
  color: var(--text-light);
}

#absence-date-pick {
  padding: 8px 10px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 0.85rem;
}

.selected-dates {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  min-height: 28px;
}

.date-chip {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 10px;
  background: var(--permanent-bg);
  border: 1px solid var(--permanent);
  border-radius: 20px;
  font-size: 0.75rem;
  color: var(--permanent);
  font-weight: 600;
}

.date-chip-remove {
  cursor: pointer;
  font-size: 0.9rem;
  line-height: 1;
  opacity: 0.7;
}

.date-chip-remove:hover {
  opacity: 1;
}

/* Toast */

.toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  padding: 12px 24px;
  background: var(--text);
  color: white;
  border-radius: var(--radius);
  font-size: 0.9rem;
  z-index: 200;
  transition: opacity 0.3s;
}

.toast.hidden {
  opacity: 0;
  pointer-events: none;
}

.toast.error {
  background: var(--danger);
}

/* Responsive */

@media (max-width: 600px) {
  #desk-map {
    flex-direction: column;
    align-items: stretch;
  }

  .entrance {
    order: 0;
    border-right: none;
    border-bottom: 3px double var(--border);
    padding-right: 0;
    padding-bottom: 12px;
  }

  .entrance span {
    writing-mode: horizontal-tb;
    transform: none;
    letter-spacing: 6px;
  }

  .clusters-row {
    order: 1;
    flex-direction: column;
    align-items: center;
    gap: 12px;
  }

  .cluster {
    flex: 0 0 auto;
    width: 200px;
  }

  /* Reorder desks: HTML is 1,3,2,4 — mobile needs 2,1,4,3 */
  .cluster .desk:nth-child(1) { order: 2; }
  .cluster .desk:nth-child(2) { order: 4; }
  .cluster .desk:nth-child(3) { order: 1; }
  .cluster .desk:nth-child(4) { order: 3; }

  .controls {
    gap: 8px;
  }

  #person-name {
    width: 140px;
  }

  .modal {
    min-width: auto;
    width: 90vw;
  }

  .modal-wide {
    min-width: auto;
  }
}