/* ════════════════════════════════════════════════════════════════
 * 2. 사이드바 (팔레트)
 * ════════════════════════════════════════════════════════════════ */
#sidebar-left {
  width: var(--sidebar-w);
  flex-shrink: 0;
  background: var(--bg-sidebar);
  border-right: 1px solid var(--border-dim);
  display: flex; flex-direction: column; align-items: center;
  padding: 10px 0; gap: 6px;
  overflow-y: auto; overflow-x: hidden;
  z-index: 10;
  scrollbar-width: none;
}
#sidebar-left::-webkit-scrollbar { display: none; }

.palette-item {
  width: 62px; min-height: 52px;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 1px; padding: 4px 2px 3px;
  border-radius: var(--radius-md);
  cursor: pointer;
  border: 1px solid var(--border-item);
  background: var(--bg-item);
  color: var(--text-base);
  transition: background 0.12s, border-color 0.12s, transform 0.08s;
  user-select: none; touch-action: manipulation; position: relative;
}
/* 도구 아이콘 — 캔버스와 같은 작도 규격으로 그린다 */
.palette-item svg { width: 32px; height: 26px; display: block; flex: none; overflow: visible; }
.palette-item svg .fill      { fill: var(--ink-fill); stroke: currentColor; stroke-width: 1.5; }
.palette-item svg .coil      { fill: none; stroke: currentColor; stroke-width: 1.1; stroke-linecap: round; stroke-linejoin: round; }
.palette-item svg .line,
.palette-item svg .line-only { fill: none; stroke: currentColor; stroke-width: 1.5; stroke-linecap: round; stroke-linejoin: round; }
.palette-item svg .solid     { fill: currentColor; stroke: none; }
.palette-item svg .band      { fill: none; stroke: currentColor; stroke-width: 7; stroke-linecap: butt; stroke-linejoin: round; opacity: 0.16; transform: translateY(3.5px); }
.palette-item svg .zone      { fill: currentColor; fill-opacity: 0.08; stroke: currentColor; stroke-width: 1.2; stroke-dasharray: 3 2.5; }
.palette-item svg .dot       { fill: #ffffff; stroke: currentColor; stroke-width: 1.3; }
.palette-item svg .anchor    { fill: #ffffff; stroke: currentColor; stroke-width: 1.6; }
.palette-item > span { font-size: 9.5px; line-height: 1.1; letter-spacing: -0.02em; color: var(--text-dim); white-space: nowrap; pointer-events: none; }
.palette-item.active-mode > span { color: inherit; }
.palette-item:hover { background: var(--btn-h); border-color: var(--border-active); }
.palette-item.active-mode { background: var(--sel-bg); border: 1px solid var(--border-active); color: var(--text-accent); box-shadow: 0 0 0 2px rgba(37,99,235,0.18); }
.palette-item:active { transform: scale(0.88); }

.sidebar-danger-btn {
  width: 48px; height: 48px; flex-shrink: 0; margin-top: auto;
  display: flex; align-items: center; justify-content: center;
  border-radius: var(--radius-md); cursor: pointer;
  border: 1px solid var(--danger-border); background: var(--danger-bg); color: var(--danger-text);
  font-size: 9.5px; line-height: 1.15;
  transition: background 0.12s, border-color 0.12s, transform 0.08s;
  user-select: none; touch-action: manipulation; position: relative;
}
.sidebar-danger-btn:hover { background: #fbdada; border-color: #e09a9a; }
.sidebar-danger-btn:active { transform: scale(0.88); }

.palette-item[title]:hover::after,
.sidebar-danger-btn[title]:hover::after {
  content: attr(title);
  position: absolute; left: calc(100% + 8px); top: 50%; transform: translateY(-50%);
  background: var(--bg-ctx); color: var(--text-accent2);
  padding: 4px 8px; border-radius: var(--radius-sm); white-space: nowrap; font-size: 11px;
  pointer-events: none; z-index: 100; border: 1px solid var(--border-base);
  backdrop-filter: blur(8px); box-shadow: var(--shadow-panel);
}

.palette-separator { width: 52px; height: 1px; background: var(--border-dim); margin: 2px 0; }