/* ── Sidebar ── */
#sidebar {
  width: var(--sidebar-w);
  min-width: var(--sidebar-w);
  background: var(--bg-primary);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  z-index: 10;
  flex-shrink: 0;
}

/* Header */
#sidebar-header {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}

.sidebar-logo-img {
  height: 38px;
  width: auto;
  object-fit: contain;
  flex-shrink: 0;
}

.sidebar-title {
  display: flex;
  flex-direction: column;
  gap: 1px;
}

.sidebar-title-main {
  font-size: 15px;
  font-weight: 700;
  color: var(--text-title);
  letter-spacing: -0.01em;
}

.sidebar-title-sub {
  font-size: 12px;
  color: var(--text-muted);
}

/* Section label */
.sidebar-section-label {
  padding: 12px 16px 6px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-muted);
  flex-shrink: 0;
}

/* Layer tree */
#layer-tree {
  flex: 1;
  overflow-y: auto;
  padding: 4px 0 16px;
}

.layer-loading {
  padding: 16px;
  font-size: 13px;
  color: var(--text-muted);
  text-align: center;
}

/* API layer — toggleable row */
.layer-api-row {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 7px 16px;
  margin: 4px 8px;
  background: var(--accent-light);
  border: 1px solid #bfdbfe;
  border-radius: var(--radius-sm);
  cursor: pointer;
}

.layer-api-row input[type="checkbox"] {
  width: 15px;
  height: 15px;
  accent-color: var(--accent);
  cursor: pointer;
  flex-shrink: 0;
}

.layer-api-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
  flex-shrink: 0;
  animation: pulse-dot 2s ease-in-out infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.6; transform: scale(0.8); }
}

.layer-api-name {
  font-size: 14px;
  font-weight: 600;
  color: var(--accent);
}

/* WMS group */
.layer-group {
  margin: 2px 0;
}

.layer-group-header {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 7px 16px;
  cursor: pointer;
  user-select: none;
  transition: background 0.12s;
}

.layer-group-header:hover {
  background: var(--bg-secondary);
}

.layer-group-toggle {
  flex-shrink: 0;
}

.layer-group-toggle input[type="checkbox"] {
  width: 15px;
  height: 15px;
  accent-color: var(--accent);
  cursor: pointer;
}

.layer-group-arrow {
  width: 16px;
  height: 16px;
  color: var(--text-muted);
  transition: transform 0.2s;
  flex-shrink: 0;
}

.layer-group.open .layer-group-arrow {
  transform: rotate(90deg);
}

.layer-group-name {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-title);
  flex: 1;
}

/* Layer items */
.layer-items {
  display: none;
  padding: 0 0 4px 16px;
}

.layer-group.open .layer-items {
  display: block;
}

.layer-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 5px 8px 5px 24px;
  border-radius: var(--radius-sm);
  transition: background 0.1s;
  cursor: pointer;
}

.layer-item:hover {
  background: var(--bg-muted);
}

.layer-item input[type="checkbox"] {
  width: 14px;
  height: 14px;
  accent-color: var(--accent);
  cursor: pointer;
  flex-shrink: 0;
}

.layer-item-name {
  font-size: 13px;
  color: var(--text-body);
  line-height: 1.3;
}

/* Separator between groups */
.layer-separator {
  height: 1px;
  background: var(--border);
  margin: 6px 12px;
}

/* Brand footer */
#sidebar-brand {
  flex-shrink: 0;
  padding: 12px 16px;
  border-top: 1px solid var(--border);
  display: flex;
  flex-direction: row;
  align-items: center;
  justify-content: center;
  gap: 4px;
  background: var(--bg-secondary);
}

.brand-logo {
  height: 24px;
  width: auto;
  opacity: 0.85;
  margin-right: 8px;
}


.brand-line {
  font-size: 10px;
  color: var(--text-muted);
}