/* ── Left Sidebar Tool Buttons ───────────────── */
.tool-btn {
  width: 58px;
  height: 52px;
  border-radius: var(--radius-sm);
  background: transparent;
  border: none;
  color: var(--panel-text-muted);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 3px;
  cursor: pointer;
  transition: all 200ms;
  font-size: 10px;
  font-weight: 500;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 58px;
  position: relative;
}

.tool-btn svg {
  width: 22px;
  height: 22px;
  transition: transform 150ms;
}

.tool-btn:hover {
  background: rgba(255,255,255,0.08);
  color: #fff;
}

.tool-btn:hover svg {
  transform: scale(1.1);
}

.tool-btn.active {
  background: linear-gradient(135deg, var(--color-brand), var(--color-brand-dark));
  color: #fff;
  box-shadow: 0 2px 8px rgba(242,0,0,0.35);
}

.tool-btn.active::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 3px;
  height: 24px;
  background: #fff;
  border-radius: 0 3px 3px 0;
}

.tool-separator {
  width: 36px;
  height: 1px;
  background: var(--panel-border);
  margin: 6px 0;
}

/* ── Top context toolbar ────────────────────── */
.context-toolbar {
  position: absolute;
  top: 12px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--panel-bg);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius-md);
  padding: 6px 10px;
  display: flex;
  align-items: center;
  gap: 4px;
  z-index: 10;
  box-shadow: 0 4px 20px rgba(0,0,0,0.4);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.context-toolbar button {
  width: 34px;
  height: 34px;
  border-radius: 8px;
  background: transparent;
  border: none;
  color: var(--panel-text);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 200ms;
}

.context-toolbar button:hover {
  background: rgba(255,255,255,0.1);
}

.context-toolbar button.active {
  background: var(--color-brand);
  color: #fff;
  box-shadow: 0 2px 6px rgba(242,0,0,0.3);
}

.context-toolbar .separator {
  width: 1px;
  height: 24px;
  background: var(--panel-border);
  margin: 0 6px;
}

.context-toolbar select {
  background: rgba(255,255,255,0.08);
  border: 1px solid var(--panel-border);
  color: var(--panel-text);
  padding: 6px 10px;
  border-radius: 8px;
  font-size: 13px;
  outline: none;
  transition: border-color 200ms;
}

.context-toolbar select:focus {
  border-color: var(--color-brand);
}

.context-toolbar input[type="number"] {
  background: rgba(255,255,255,0.08);
  border: 1px solid var(--panel-border);
  color: var(--panel-text);
  padding: 6px 10px;
  border-radius: 8px;
  font-size: 13px;
  width: 64px;
  outline: none;
  transition: border-color 200ms;
}

.context-toolbar input[type="number"]:focus {
  border-color: var(--color-brand);
}

.context-toolbar input[type="color"] {
  width: 30px;
  height: 30px;
  border: 2px solid var(--panel-border);
  border-radius: 8px;
  cursor: pointer;
  padding: 0;
  transition: border-color 200ms;
}

.context-toolbar input[type="color"]:hover {
  border-color: var(--color-brand);
}