/* === Side Panels === */
.panel {
  width: var(--panel-width);
  background: var(--bg-mid);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
  overflow: hidden;
}

#right-panel {
  border-right: none;
  border-left: 1px solid var(--border);
}

.panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 12px;
  border-bottom: 1px solid var(--border);
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-secondary);
  flex-shrink: 0;
}

.panel-actions { display: flex; gap: 4px; }
.panel-actions button {
  background: var(--bg-light);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  width: 22px;
  height: 22px;
  border-radius: 3px;
  cursor: pointer;
  font-size: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.panel-actions button:hover { background: var(--bg-hover); color: var(--text-primary); }

.panel-body {
  flex: 1;
  overflow-y: auto;
  padding: 4px;
}

/* === Layer List === */
.layer-item {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 8px;
  border-radius: 4px;
  cursor: pointer;
  font-size: 12px;
  transition: background 0.1s;
}
.layer-item:hover { background: var(--bg-hover); }
.layer-item.active { background: var(--accent-dim); border-left: 2px solid var(--accent); }

.layer-visibility {
  width: 16px;
  height: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--text-dim);
  font-size: 12px;
  flex-shrink: 0;
}
.layer-visibility.visible { color: var(--accent); }

.layer-color {
  width: 12px;
  height: 12px;
  border-radius: 2px;
  flex-shrink: 0;
}

.layer-name {
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.layer-name input {
  background: var(--bg-light);
  border: 1px solid var(--accent);
  color: var(--text-primary);
  font-size: 12px;
  padding: 1px 4px;
  width: 100%;
  outline: none;
  border-radius: 2px;
}

.layer-lock {
  width: 16px;
  height: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--text-dim);
  font-size: 10px;
  flex-shrink: 0;
}
.layer-lock.locked { color: var(--warning); }

.layer-delete {
  width: 16px;
  height: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--text-dim);
  font-size: 12px;
  flex-shrink: 0;
  opacity: 0;
  transition: opacity 0.15s;
}
.layer-item:hover .layer-delete { opacity: 1; }
.layer-delete:hover { color: var(--danger); }

/* === Properties Panel === */
.prop-section {
  padding: 8px;
  border-bottom: 1px solid var(--border);
}

.prop-section label {
  display: block;
  font-size: 10px;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 4px;
}

.prop-section input[type="color"] {
  width: 32px;
  height: 24px;
  border: 1px solid var(--border);
  border-radius: 3px;
  background: var(--bg-light);
  cursor: pointer;
  padding: 1px;
}

.prop-section input[type="range"] {
  width: 100%;
  accent-color: var(--accent);
  margin: 4px 0;
}

.prop-section select,
.prop-section input[type="number"] {
  width: 100%;
  background: var(--bg-light);
  border: 1px solid var(--border);
  color: var(--text-primary);
  padding: 4px 8px;
  border-radius: 3px;
  font-size: 12px;
}

.color-row { display: flex; align-items: center; gap: 8px; }

.color-presets {
  display: flex;
  gap: 3px;
  flex-wrap: wrap;
}

.color-preset {
  width: 16px;
  height: 16px;
  border-radius: 2px;
  cursor: pointer;
  border: 1px solid var(--border);
  transition: transform 0.1s;
}
.color-preset:hover { transform: scale(1.2); }

.checkbox-label {
  display: flex !important;
  align-items: center;
  gap: 4px;
  text-transform: none !important;
  font-size: 11px !important;
  color: var(--text-secondary) !important;
  cursor: pointer;
}

/* === Symbol Library === */
.symbol-category { margin-bottom: 2px; }

.category-header {
  padding: 6px 8px;
  font-size: 11px;
  color: var(--text-secondary);
  cursor: pointer;
  border-radius: 3px;
  transition: background 0.1s;
}
.category-header:hover { background: var(--bg-hover); }
.category-header.open { color: var(--text-primary); }

.symbol-grid {
  display: none;
  grid-template-columns: repeat(3, 1fr);
  gap: 4px;
  padding: 4px 8px;
}
.symbol-grid.open { display: grid; }

.symbol-item {
  aspect-ratio: 1;
  background: var(--bg-light);
  border: 1px solid var(--border);
  border-radius: 4px;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2px;
  padding: 4px;
  transition: all 0.15s;
}
.symbol-item:hover {
  border-color: var(--accent);
  background: var(--bg-hover);
}
.symbol-item.selected {
  border-color: var(--accent);
  background: var(--accent-dim);
}

.symbol-item svg {
  width: 32px;
  height: 32px;
}

.symbol-item span {
  font-size: 8px;
  color: var(--text-dim);
  text-align: center;
  line-height: 1.1;
}