/* ============================================================
   ProPDF Editor — Left Toolbar Styles
   ============================================================ */

.left-toolbar {
  width: var(--left-toolbar-w);
  min-width: var(--left-toolbar-w);
  background: var(--bg-secondary);
  border-right: 1px solid var(--border);
  display: flex; flex-direction: column;
  padding: 8px 6px; gap: 2px;
  overflow-y: auto; overflow-x: hidden;
  z-index: 80;
}

.tool-group {
  display: flex; flex-direction: column; gap: 2px;
}

.tool-divider {
  height: 1px; background: var(--border);
  margin: 6px 4px;
}

.tool-btn {
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  width: 60px; height: 56px; border-radius: var(--radius-md);
  background: transparent; border: none;
  color: var(--text-secondary); cursor: pointer;
  transition: var(--transition); gap: 3px;
  position: relative;
}
.tool-btn:hover {
  background: var(--bg-hover); color: var(--text-primary);
}
.tool-btn.active {
  background: rgba(108,99,255,0.2);
  color: var(--accent);
}
.tool-btn.active::before {
  content: '';
  position: absolute; left: 0; top: 50%; transform: translateY(-50%);
  width: 3px; height: 70%; background: var(--accent);
  border-radius: 0 3px 3px 0;
}
.tool-btn .material-icons-round { font-size: 22px; }
.tool-label { font-size: 9px; font-weight: 500; text-transform: uppercase; letter-spacing: 0.5px; }

/* Sub-panels */
.tool-sub-panel {
  display: none;
  position: absolute; left: calc(var(--left-toolbar-w) + 4px); top: 0;
  width: 200px; background: var(--bg-panel);
  border: 1px solid var(--border); border-radius: var(--radius-md);
  padding: 12px; z-index: 200;
  box-shadow: var(--shadow-lg);
  flex-direction: column; gap: 8px;
}
.tool-sub-panel.visible { display: flex; }

.sub-label {
  font-size: 11px; color: var(--text-muted); font-weight: 500;
  text-transform: uppercase; letter-spacing: 0.5px;
}
.sub-range {
  width: 100%; accent-color: var(--accent);
  height: 4px; cursor: pointer;
}
.sub-color {
  width: 36px; height: 28px; border: 1px solid var(--border);
  border-radius: var(--radius-sm); cursor: pointer; padding: 2px;
  background: var(--bg-card);
}

.brush-styles {
  display: flex; gap: 4px; flex-wrap: wrap;
}
.brush-style-btn {
  padding: 4px 10px; border-radius: var(--radius-sm);
  background: var(--bg-card); border: 1px solid var(--border);
  color: var(--text-secondary); font-size: 11px; cursor: pointer;
  transition: var(--transition);
}
.brush-style-btn:hover, .brush-style-btn.active {
  background: var(--accent); border-color: var(--accent); color: #fff;
}

/* Shape grid */
.shape-grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 6px;
}
.shape-btn {
  display: flex; align-items: center; justify-content: center;
  width: 40px; height: 40px; border-radius: var(--radius-sm);
  background: var(--bg-card); border: 1px solid var(--border);
  color: var(--text-secondary); cursor: pointer; transition: var(--transition);
}
.shape-btn svg { width: 22px; height: 22px; }
.shape-btn:hover, .shape-btn.active {
  background: rgba(108,99,255,0.2); border-color: var(--accent); color: var(--accent);
}

.shape-options {
  display: flex; flex-direction: column; gap: 6px;
  padding-top: 8px; border-top: 1px solid var(--border);
}