:root {
  --bg: #f6f7fb;
  --surface: #fff;
  --border: #e2e5ec;
  --text: #1a1d24;
  --muted: #6b7280;
  --primary: #2563eb;
  --primary-hover: #1d4ed8;
  --danger: #dc2626;
  --success: #047857;
  --warn: #b45309;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 14px;
  line-height: 1.5;
}
a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }

.topnav {
  display: flex;
  align-items: center;
  gap: 24px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 12px 24px;
}
.topnav .brand { font-weight: 700; }
.topnav .brand a { color: inherit; }
.topnav nav { display: flex; gap: 14px; flex: 1; }
.topnav nav a { color: var(--text); padding: 6px 4px; }
.topnav nav a:hover { color: var(--primary); text-decoration: none; }
.topnav .account { display: flex; align-items: center; gap: 12px; color: var(--muted); }

main { max-width: 1100px; margin: 24px auto; padding: 0 24px; }

h1 { margin: 0 0 16px; font-size: 22px; }
h2 { margin: 0 0 12px; font-size: 16px; }
h3 { margin: 16px 0 8px; font-size: 14px; }

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 20px;
  margin-bottom: 20px;
}
.card.narrow { max-width: 480px; margin-left: auto; margin-right: auto; }

.cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); gap: 12px; margin-bottom: 20px; }
.stat {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px;
  text-align: center;
}
.stat-num { font-size: 28px; font-weight: 700; color: var(--primary); }

table { width: 100%; border-collapse: collapse; }
th, td { padding: 8px 10px; border-bottom: 1px solid var(--border); text-align: left; vertical-align: top; }
th { background: #f8f9fc; font-weight: 600; font-size: 12px; text-transform: uppercase; letter-spacing: 0.04em; color: var(--muted); }
td.actions form { margin-right: 4px; }

form label { display: block; margin-bottom: 12px; font-size: 13px; color: var(--muted); }
form input, form select, form textarea {
  width: 100%;
  padding: 8px 10px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font: inherit;
  background: #fff;
  color: var(--text);
  margin-top: 4px;
}
form textarea { resize: vertical; font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 13px; }

.grid-form { display: grid; grid-template-columns: 1fr 1fr; gap: 12px 16px; align-items: end; }
.grid-form .full { grid-column: 1 / -1; }
.grid-form button { grid-column: 1 / -1; }

button, .button {
  display: inline-block;
  padding: 8px 14px;
  border: 1px solid var(--border);
  background: #fff;
  color: var(--text);
  border-radius: 6px;
  cursor: pointer;
  font: inherit;
  text-decoration: none;
}
button:hover, .button:hover { border-color: var(--primary); color: var(--primary); }
button.primary { background: var(--primary); border-color: var(--primary); color: #fff; }
button.primary:hover { background: var(--primary-hover); border-color: var(--primary-hover); color: #fff; }
button.danger { color: var(--danger); border-color: #f3c4c4; }
button.danger:hover { background: var(--danger); color: #fff; border-color: var(--danger); }
button.link { background: none; border: none; color: var(--primary); padding: 0; cursor: pointer; }
button.link:hover { text-decoration: underline; }

.inline { display: inline-block; }

.muted { color: var(--muted); }
.small { font-size: 12px; }
.success { color: var(--success); }
.error { color: var(--danger); }

/* Password show/hide toggle. Wrap a password input in <label class="password-field">
   and the script in views/partials/footer.ejs adds a "Show" toggle button. */
label.password-field { position: relative; }
label.password-field input { padding-right: 64px; }
label.password-field .pw-toggle {
  position: absolute;
  right: 6px;
  bottom: 6px;
  padding: 4px 10px;
  font-size: 12px;
  color: var(--muted);
  background: #f1f3f7;
  border: 1px solid var(--border);
  border-radius: 4px;
  cursor: pointer;
  user-select: none;
}
label.password-field .pw-toggle:hover { color: var(--primary); border-color: var(--primary); }

label.has-error input, label.has-error select, label.has-error textarea,
fieldset.has-error { border-color: var(--danger); }
fieldset.has-error { box-shadow: 0 0 0 1px var(--danger) inset; }
.field-error { display: block; color: var(--danger); font-size: 12px; margin-top: 4px; }

.flash { padding: 10px 14px; border-radius: 6px; margin-bottom: 16px; border: 1px solid transparent; }
.flash-success { background: #ecfdf5; border-color: #a7f3d0; color: var(--success); }
.flash-error { background: #fef2f2; border-color: #fecaca; color: var(--danger); }

.badge { display: inline-block; padding: 2px 8px; border-radius: 999px; font-size: 12px; font-weight: 600; }
.badge-active { background: #dcfce7; color: #166534; }
.badge-pending_response { background: #fef3c7; color: #92400e; }
.badge-vacated { background: #e5e7eb; color: #374151; }
.badge-expired { background: #fee2e2; color: #991b1b; }
.badge-available { background: #dbeafe; color: #1e3a8a; }
.badge-occupied { background: #fef3c7; color: #92400e; }
.badge-maintenance { background: #f3e8ff; color: #6b21a8; }

code { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; background: #f1f3f7; padding: 1px 4px; border-radius: 4px; }

.location-head { display: flex; justify-content: space-between; align-items: center; gap: 12px; }
.location-head h2, .location-head h4 { margin: 0; }
.location-toolbar { display: flex; align-items: center; gap: 8px; margin-bottom: 12px; }
details.card > summary, details.location-sub > summary { list-style: none; cursor: pointer; }
details.card > summary::-webkit-details-marker, details.location-sub > summary::-webkit-details-marker { display: none; }
details.card > summary::before, details.location-sub > summary::before {
  content: '▶'; display: inline-block; font-size: 10px; color: var(--muted); margin-right: 8px; transition: transform 0.15s;
}
details[open].card > summary::before, details[open].location-sub > summary::before { transform: rotate(90deg); }
.indent { margin-left: 18px; padding-left: 18px; border-left: 2px solid var(--border); margin-top: 12px; }
.location-sub { margin-bottom: 16px; padding-bottom: 12px; border-bottom: 1px dashed var(--border); }
.location-sub:last-child { border-bottom: none; }

details { margin: 12px 0; }
details > summary { cursor: pointer; color: var(--primary); font-weight: 500; padding: 6px 0; }

/* Map view */
.map-wrap { display: grid; grid-template-columns: 1fr 320px; gap: 16px; }
.map-canvas-wrap { background: #fafbfd; border: 1px solid var(--border); border-radius: 8px; overflow: hidden; }
svg.floor-map { background:
    repeating-linear-gradient(0deg, #eef0f5 0 1px, transparent 1px 40px),
    repeating-linear-gradient(90deg, #eef0f5 0 1px, transparent 1px 40px),
    #fff;
  display: block;
}
.locker {
  cursor: grab;
  stroke: #1e293b;
  stroke-width: 1;
}
.locker.dragging { cursor: grabbing; opacity: 0.7; }
.locker { fill: #d1d5db; }                      /* default: unassigned/available */
.locker.locked { stroke-dasharray: 4 2; }
/* Selection overlay rect drawn on top of selected lockers (translucent blue). */
.locker-selected-overlay {
  fill: rgba(37, 99, 235, 0.25);
  stroke: var(--primary);
  stroke-width: 2.5;
  pointer-events: none;
}
.lock-badge { font-size: 10px; pointer-events: none; }
.locker.selection-violation {
  stroke: var(--danger);
  stroke-width: 3.5;
  animation: pulse-violation 1.4s ease-in-out infinite;
}
@keyframes pulse-violation {
  0%, 100% { stroke-opacity: 1; }
  50% { stroke-opacity: 0.5; }
}

.violation-overlay {
  position: absolute;
  top: 12px; right: 12px;
  background: rgba(220, 38, 38, 0.95);
  color: #fff;
  padding: 10px 14px;
  border-radius: 6px;
  font-size: 13px;
  font-weight: 500;
  max-width: 320px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.2);
  pointer-events: none;
  animation: fade-in 0.15s ease-out;
  z-index: 5;
}
@keyframes fade-in {
  from { opacity: 0; transform: translateY(-4px); }
  to { opacity: 1; transform: translateY(0); }
}
.rubber-band { fill: rgba(37, 99, 235, 0.10); stroke: #2563eb; stroke-dasharray: 4 3; pointer-events: none; }

.context-menu {
  position: fixed;
  z-index: 200;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 6px;
  box-shadow: 0 8px 24px rgba(0,0,0,0.15);
  padding: 4px 0;
  min-width: 140px;
  font-size: 13px;
}
.context-menu button {
  display: block;
  width: 100%;
  text-align: left;
  border: none;
  background: none;
  padding: 6px 14px;
  cursor: pointer;
  border-radius: 0;
}
.context-menu button:hover { background: #eef2ff; color: var(--primary); }
.locker.status-occupied { fill: #fca5a5; }      /* assigned/occupied: red */
.locker.status-pending { fill: #fca5a5; }       /* awaiting renewal response: still red */
.locker.status-maintenance,
.locker.status-unavailable {
  fill: #d1d5db;
  /* Subtle diagonal stripes to differentiate from plain "available" */
  background: repeating-linear-gradient(45deg, #d1d5db 0 6px, #b6bcc6 6px 12px);
}
.locker.status-unavailable {
  stroke-dasharray: 6 3;
  stroke: #6b7280;
}
.locker.status-yours { fill: #86efac; }          /* user's own reservation: green */
.locker-label {
  font-size: 10px;
  pointer-events: none;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  fill: #1e293b;
  text-anchor: middle;
}
.legend { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 8px; font-size: 12px; color: var(--muted); }
.legend-swatch { display: inline-block; width: 14px; height: 14px; border-radius: 3px; border: 1px solid #1e293b; vertical-align: middle; margin-right: 4px; }

.side-panel { background: var(--surface); border: 1px solid var(--border); border-radius: 8px; padding: 16px; max-height: 720px; overflow-y: auto; position: sticky; top: 16px; }
.side-panel h3 { margin: 0 0 8px; }
.side-panel .field { margin-bottom: 8px; }
.side-panel .field label { color: var(--muted); font-size: 12px; }
.reservation-item { padding: 8px 10px; background: #f1f5f9; border-radius: 6px; margin-bottom: 6px; font-size: 13px; }
.reservation-item strong { color: var(--text); }
.side-panel .field strong { display: block; }

.tag { display: inline-block; padding: 2px 6px; margin: 1px; border-radius: 4px; background: #eef2ff; color: #3730a3; font-size: 11px; }

fieldset { border: 1px solid var(--border); border-radius: 6px; padding: 10px 14px; }
fieldset legend { font-size: 12px; color: var(--muted); padding: 0 6px; }
.checkbox-inline { display: inline-flex; align-items: center; gap: 6px; margin-right: 12px; margin-bottom: 6px; font-size: 13px; color: var(--text); }
.checkbox-inline input { width: auto; margin: 0; }

/* Page header (title + actions row) */
.page-header { display: flex; justify-content: space-between; align-items: center; gap: 12px; margin-bottom: 16px; }
.page-header h1 { margin: 0; }

/* Sortable table headers */
th.sortable { cursor: pointer; user-select: none; }
th.sortable:hover { color: var(--primary); }
th.sortable.sort-asc::after { content: ' ▲'; font-size: 9px; }
th.sortable.sort-desc::after { content: ' ▼'; font-size: 9px; }

/* Users page toolbar */
.users-toolbar { display: flex; align-items: center; gap: 12px; margin-bottom: 12px; }
.users-toolbar input[type="text"] { flex: 0 1 360px; margin: 0; }

/* Maps grid */
.map-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 12px; }
.map-card {
  display: block; background: var(--surface); border: 1px solid var(--border);
  border-radius: 8px; padding: 16px; color: var(--text); text-decoration: none;
  transition: border-color 0.15s, transform 0.15s;
}
.map-card:hover { border-color: var(--primary); text-decoration: none; transform: translateY(-1px); }
.map-card-head { margin-bottom: 12px; display: flex; flex-direction: column; gap: 2px; }
.map-card-body { display: flex; gap: 16px; }
.map-stat { display: flex; flex-direction: column; align-items: center; }
.map-stat .num { font-size: 22px; font-weight: 700; color: var(--primary); }
.map-stat .lbl { font-size: 11px; color: var(--muted); text-transform: uppercase; letter-spacing: 0.04em; }

/* Configuration tabs */
.config-tabs {
  display: flex;
  gap: 4px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 20px;
}
.config-tab {
  padding: 8px 16px;
  color: var(--muted);
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
  font-weight: 500;
}
.config-tab:hover { color: var(--primary); text-decoration: none; }
.config-tab.active { color: var(--primary); border-bottom-color: var(--primary); }

/* Modal */
.modal-backdrop {
  position: fixed; inset: 0; background: rgba(15, 23, 42, 0.5);
  display: flex; align-items: center; justify-content: center; z-index: 100;
}
.modal {
  background: var(--surface); border-radius: 8px; padding: 24px;
  max-width: 520px; width: 92%; max-height: 90vh; overflow-y: auto;
  box-shadow: 0 12px 40px rgba(0,0,0,0.2);
}
.modal h3 { margin-top: 0; }
.modal .modal-actions { display: flex; gap: 8px; justify-content: flex-end; margin-top: 16px; }

/* Tab bar (signup-select) */
.tab-btn {
  background: none; border: none; border-bottom: 3px solid transparent;
  padding: 10px 18px; font-size: 1rem; cursor: pointer; border-radius: 0;
  color: var(--muted); font-weight: 500;
}
.tab-btn.active { color: var(--primary, #2563eb); border-bottom-color: var(--primary, #2563eb); }
.tab-btn:hover:not(.active) { background: var(--surface); }

/* Switcher / toolbar */
.toolbar {
  display: flex; gap: 12px; flex-wrap: wrap; align-items: end;
  background: var(--surface); border: 1px solid var(--border); border-radius: 8px;
  padding: 10px 14px; margin-bottom: 12px;
}
.toolbar label { margin: 0; }
.toolbar .toolbar-spacer { flex: 1; }
.toolbar .toggle { display: inline-flex; align-items: center; gap: 6px; }

/* Responsive map */
.map-canvas-wrap { height: 72vh; position: relative; }
svg.floor-map { width: 100%; height: 100%; display: block; touch-action: none; }
@media (max-width: 900px) {
  .map-wrap { grid-template-columns: 1fr; }
  .side-panel { position: static; max-height: none; }
}

/* Map zoom controls (visible on all devices, primary on touch) */
.map-zoom-controls {
  position: absolute;
  bottom: 12px;
  right: 12px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  z-index: 4;
}
.map-zoom-controls button {
  width: 44px;
  height: 44px;
  font-size: 22px;
  font-weight: 600;
  background: rgba(255,255,255,0.95);
  border: 1px solid var(--border);
  border-radius: 6px;
  box-shadow: 0 2px 6px rgba(0,0,0,0.15);
  cursor: pointer;
  padding: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}
.map-zoom-controls button:hover { color: var(--primary); border-color: var(--primary); }

/* ==================================================================
   Mobile responsive layout. Targets common phone widths (≤640px).
   ================================================================== */

/* Hide top-nav links by default and show a hamburger toggle on mobile.
   The toggle is a checkbox so we don't need any JS. */
.nav-toggle, .nav-toggle-label { display: none; }

@media (max-width: 720px) {
  main { margin: 16px 0; padding: 0 12px; }
  .topnav {
    flex-wrap: wrap;
    gap: 8px;
    padding: 10px 14px;
    position: relative;
  }
  .topnav .brand { flex: 1; }
  .topnav .account { order: 2; }
  .nav-toggle-label {
    display: inline-block;
    cursor: pointer;
    padding: 8px 10px;
    border: 1px solid var(--border);
    border-radius: 6px;
    font-size: 18px;
    line-height: 1;
    user-select: none;
  }
  .topnav nav {
    display: none;
    flex-basis: 100%;
    flex-direction: column;
    gap: 0;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 6px;
  }
  .nav-toggle:checked ~ nav { display: flex; }
  .topnav nav a {
    padding: 12px 10px;
    border-bottom: 1px solid var(--border);
  }
  .topnav nav a:last-child { border-bottom: none; }

  /* Forms collapse to single column */
  .grid-form { grid-template-columns: 1fr; }

  /* Tables: enable horizontal scroll within their container */
  .card { padding: 14px; overflow-x: auto; }
  table { font-size: 13px; }
  th, td { padding: 6px 8px; }

  /* Page-header rows stack */
  .page-header { flex-direction: column; align-items: stretch; gap: 8px; }
  .page-header > div { display: flex; flex-wrap: wrap; gap: 6px; }

  /* Toolbar on rentals/users: stack */
  .users-toolbar, .toolbar, .location-toolbar {
    flex-direction: column;
    align-items: stretch;
  }
  .users-toolbar input[type="text"] { flex: 1; }

  /* Buttons get touch-target size */
  button, .button {
    min-height: 40px;
    padding: 10px 14px;
  }

  /* Modal: full-width on small screens */
  .modal {
    width: 100%;
    max-width: 100%;
    max-height: 100vh;
    border-radius: 0;
    margin: 0;
    padding: 18px 14px;
  }
  .modal-backdrop { padding: 0; }

  /* Floor map side panel becomes a bottom-stacked card */
  .map-wrap { grid-template-columns: 1fr; gap: 12px; }
  .side-panel {
    position: static;
    max-height: none;
    margin-top: 12px;
  }

  /* Configuration tabs: scroll horizontally if too many */
  .config-tabs {
    overflow-x: auto;
    flex-wrap: nowrap;
    -webkit-overflow-scrolling: touch;
  }
  .config-tab { white-space: nowrap; }
}