/* ===== RESET & BASE ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg-dark:    #1a1a2e;
  --bg-mid:     #16213e;
  --bg-panel:   #0f3460;
  --bg-item:    #1e2a45;
  --bg-hover:   #2a3a5c;
  --bg-active:  #e94560;
  --text:       #e0e0e0;
  --text-dim:   #8899aa;
  --border:     #2a3a5c;
  --accent:     #e94560;
  --accent2:    #4ecca3;
  --font:       'Segoe UI', sans-serif;
  --sidebar-w:  260px;
  --panel-r-w:  220px;
  --header-h:   48px;
}

body {
  font-family: var(--font);
  background: var(--bg-dark);
  color: var(--text);
  height: 100vh;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

/* ===== HEADER ===== */
#header {
  height: var(--header-h);
  background: var(--bg-mid);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  padding: 0 16px;
  gap: 12px;
  flex-shrink: 0;
  z-index: 10;
}

.logo {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--accent2);
  letter-spacing: 1px;
  white-space: nowrap;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-left: auto;
}

.pack-name {
  color: var(--text-dim);
  font-size: 0.85rem;
  max-width: 200px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* ===== BUTTONS ===== */
.btn {
  padding: 6px 14px;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  font-size: 0.85rem;
  font-family: var(--font);
  transition: filter 0.15s, transform 0.1s;
}
.btn:hover { filter: brightness(1.15); }
.btn:active { transform: scale(0.97); }
.btn-primary   { background: var(--accent);  color: #fff; }
.btn-secondary { background: var(--bg-panel); color: var(--text); border: 1px solid var(--border); }
.btn-small { padding: 3px 10px; font-size: 0.78rem; }

/* ===== MAIN LAYOUT ===== */
#app {
  display: flex;
  flex: 1;
  overflow: hidden;
}

/* ===== SIDEBAR ===== */
#sidebar {
  width: var(--sidebar-w);
  min-width: var(--sidebar-w);
  background: var(--bg-mid);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.sidebar-header {
  padding: 10px 10px 8px;
  border-bottom: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 0.82rem;
  color: var(--text-dim);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
}

#search-box {
  background: var(--bg-item);
  border: 1px solid var(--border);
  border-radius: 5px;
  color: var(--text);
  padding: 5px 8px;
  font-size: 0.83rem;
  font-family: var(--font);
  outline: none;
  transition: border-color 0.2s;
}
#search-box:focus { border-color: var(--accent2); }

#tree-container {
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
  padding: 6px 0;
}

/* ===== TREE ===== */
.tree-folder, .tree-file {
  display: flex;
  align-items: center;
  gap: 5px;
  padding: 2px 6px;
  cursor: pointer;
  font-size: 0.82rem;
  white-space: nowrap;
  overflow: hidden;
  border-radius: 4px;
  margin: 1px 4px;
  transition: background 0.1s;
  user-select: none;
}

/* 樹狀縮圖 */
.tree-thumb {
  width: 16px; height: 16px;
  flex-shrink: 0;
  image-rendering: pixelated;
  border-radius: 2px;
  background:
    repeating-conic-gradient(#333 0% 25%, #2a2a2a 0% 50%)
    0 0 / 4px 4px;
}
.tree-folder:hover, .tree-file:hover { background: var(--bg-hover); }
.tree-file.active { background: var(--accent); color: #fff; }

.tree-folder .arrow {
  display: inline-block;
  transition: transform 0.15s;
  font-size: 0.7rem;
  color: var(--text-dim);
  flex-shrink: 0;
}
.tree-folder.open .arrow { transform: rotate(90deg); }

.tree-children {
  display: none;
  padding-left: 14px;
}
.tree-folder.open + .tree-children { display: block; }

.tree-icon { flex-shrink: 0; font-size: 0.9rem; }
.tree-label { overflow: hidden; text-overflow: ellipsis; }

/* ===== EDITOR AREA ===== */
#editor-area {
  flex: 1;
  background: var(--bg-dark);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  position: relative;
}

#editor-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  color: var(--text-dim);
}
.placeholder-icon { font-size: 3rem; }
.placeholder-text { font-size: 1rem; }

/* ===== RIGHT PANEL ===== */
#panel-right {
  width: 220px;
  min-width: 220px;
  background: var(--bg-mid);
  border-left: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  overflow: hidden;   /* 不讓整體捲動，各區塊自己處理 */
}

.panel-section {
  border-bottom: 1px solid var(--border);
  padding: 10px;
  flex-shrink: 0;
}
.panel-section.scroll-section {
  flex: 1;
  overflow-y: auto;
  min-height: 0;      /* flex 子元素才能正確縮小 */
}
.panel-title {
  font-size: 0.78rem;
  color: var(--text-dim);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 8px;
}

#preview-3d {
  width: 100%;
  height: 190px;      /* 固定高度，不再 aspect-ratio 撐爆 */
  background: #0a0a18;
  border-radius: 6px;
  overflow: hidden;
  position: relative;
  display: flex;
  flex-direction: column;
}

#preview-3d canvas {
  flex: 1;
  width: 100% !important;
  height: 0 !important;   /* 讓 flex:1 控制高度 */
  cursor: grab;
}
#preview-3d canvas:active { cursor: grabbing; }

#preview-ui {
  display: flex;
  align-items: center;
  gap: 3px;
  padding: 3px 5px;
  background: rgba(0,0,0,0.5);
  flex-shrink: 0;
}
#preview-ui .tb-btn {
  width: 24px; height: 24px;
  font-size: 0.75rem;
}

/* ===== MISC ===== */
.empty-hint {
  color: var(--text-dim);
  font-size: 0.8rem;
  text-align: center;
  padding: 20px 10px;
}

/* scrollbar */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-dim); }

/* drag-over highlight */
body.drag-over #app { outline: 3px dashed var(--accent2); outline-offset: -3px; }

/* ===== IMAGE VIEWER ===== */
#image-viewer {
  display: flex;
  flex-direction: column;
  width: 100%;
  height: 100%;
  overflow: hidden;
}

.iv-topbar {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 14px;
  background: var(--bg-mid);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}

.iv-name {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--accent2);
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.iv-actions { display: flex; gap: 6px; }

.iv-canvas-wrap {
  flex: 1;
  overflow: auto;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  background:
    repeating-conic-gradient(#222 0% 25%, #2a2a2a 0% 50%)
    0 0 / 20px 20px;
}

#pixel-canvas {
  image-rendering: pixelated;
  image-rendering: crisp-edges;
  width: min(80%, 400px);
  height: auto;
  border: 1px solid var(--border);
  box-shadow: 0 0 20px rgba(0,0,0,0.5);
}

.iv-info {
  text-align: center;
  padding: 6px;
  font-size: 0.78rem;
  color: var(--text-dim);
  background: var(--bg-mid);
  border-top: 1px solid var(--border);
  flex-shrink: 0;
}

/* ===== BATCH MODAL ===== */
#batch-modal {
  position: fixed; inset: 0;
  background: rgba(0,0,0,0.7);
  z-index: 1000;
  display: flex; align-items: center; justify-content: center;
}

#batch-dialog {
  background: var(--bg-mid);
  border: 1px solid var(--border);
  border-radius: 10px;
  width: min(90vw, 820px);
  max-height: 90vh;
  display: flex; flex-direction: column;
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(0,0,0,0.8);
}

#batch-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 12px 16px;
  background: var(--bg-dark);
  border-bottom: 1px solid var(--border);
  font-weight: 700; font-size: 1rem;
  color: var(--accent2);
  flex-shrink: 0;
}

#batch-body {
  display: flex; flex: 1; overflow: hidden;
}

/* 左側檔案列表 */
#batch-filelist {
  width: 220px; min-width: 220px;
  border-right: 1px solid var(--border);
  display: flex; flex-direction: column;
  overflow: hidden; padding: 10px;
}

.batch-section-title {
  font-size: 0.78rem; font-weight: 600;
  color: var(--text-dim); text-transform: uppercase; letter-spacing: 0.5px;
  margin-bottom: 8px; display: flex; align-items: center; gap: 6px;
}

.badge {
  background: var(--accent); color: #fff;
  border-radius: 10px; padding: 0 6px; font-size: 0.72rem;
}

#batch-files-scroll {
  flex: 1; overflow-y: auto;
  display: flex; flex-direction: column; gap: 2px;
}

.batch-file-item {
  display: flex; align-items: center; gap: 6px;
  padding: 3px 4px; border-radius: 4px; cursor: pointer;
  font-size: 0.78rem;
}
.batch-file-item:hover { background: var(--bg-hover); }
.bf-name { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

.batch-file-actions {
  display: flex; gap: 4px; margin-top: 8px; flex-shrink: 0;
}

/* 右側操作 */
#batch-ops {
  flex: 1; display: flex; flex-direction: column; overflow: hidden;
}

.batch-tabs {
  display: flex; flex-shrink: 0;
  border-bottom: 1px solid var(--border);
  background: var(--bg-dark);
}

.batch-tab {
  padding: 8px 16px; font-size: 0.82rem;
  background: none; border: none; color: var(--text-dim);
  cursor: pointer; font-family: var(--font);
  border-bottom: 2px solid transparent; margin-bottom: -1px;
  transition: all 0.15s;
}
.batch-tab:hover { color: var(--text); }
.batch-tab.active { color: var(--accent2); border-bottom-color: var(--accent2); }

.batch-panel { display: none; flex: 1; overflow-y: auto; padding: 14px; }
.batch-panel.active { display: flex; flex-direction: column; gap: 10px; }

.batch-row {
  display: flex; align-items: center; gap: 10px;
}
.batch-row label { width: 70px; font-size: 0.82rem; color: var(--text-dim); flex-shrink: 0; }
.batch-input {
  flex: 1; background: var(--bg-item); border: 1px solid var(--border);
  border-radius: 4px; color: var(--text); padding: 4px 8px;
  font-size: 0.82rem; font-family: var(--font); outline: none;
}
.batch-input:focus { border-color: var(--accent2); }
.sl-val { width: 44px; text-align: right; font-size: 0.8rem; color: var(--text-dim); flex-shrink: 0; }

.batch-check-row {
  display: flex; align-items: center; gap: 8px;
  font-size: 0.82rem; cursor: pointer;
}

.batch-hint {
  font-size: 0.78rem; color: var(--text-dim); line-height: 1.5;
}

/* 調整預覽 */
.batch-preview-row {
  display: flex; gap: 16px; align-items: flex-start;
  margin-top: 4px;
}
.batch-preview-label {
  font-size: 0.72rem; color: var(--text-dim); margin-bottom: 4px; text-align: center;
}
.batch-preview-row canvas {
  image-rendering: pixelated;
  border: 1px solid var(--border); border-radius: 4px;
  background:
    repeating-conic-gradient(#333 0% 25%, #2a2a2a 0% 50%)
    0 0 / 8px 8px;
}

/* 重命名預覽 */
.ren-preview {
  background: var(--bg-dark); border-radius: 6px;
  padding: 8px; max-height: 160px; overflow-y: auto;
  display: flex; flex-direction: column; gap: 4px;
}
.ren-row {
  display: flex; align-items: center; gap: 8px;
  font-size: 0.75rem;
}
.ren-old { color: var(--text-dim); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; max-width: 140px; }
.ren-new { color: var(--accent2); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.ren-more { font-size: 0.75rem; color: var(--text-dim); text-align: center; padding-top: 4px; }

/* Footer */
#batch-footer {
  display: flex; align-items: center; gap: 10px;
  padding: 10px 16px;
  border-top: 1px solid var(--border);
  background: var(--bg-dark);
  flex-shrink: 0;
}

#batch-progress {
  flex: 1; display: flex; align-items: center; gap: 8px;
}
#batch-prog-bar {
  flex: 1; height: 6px; background: var(--bg-item); border-radius: 3px; overflow: hidden;
}
#batch-prog-fill {
  height: 100%; background: var(--accent2); border-radius: 3px;
  transition: width 0.2s; width: 0;
}
#batch-prog-text { font-size: 0.75rem; color: var(--text-dim); white-space: nowrap; }

/* ===== PALETTE ===== */
#palette-area {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

/* 色相環 + 5×5 上方工具區 */
#pal-top-tools {
  display: flex;
  gap: 8px;
  align-items: flex-start;
  margin-bottom: 6px;
}

#pal-wheel-wrap {
  position: relative;
  width: 130px;
  height: 130px;
  flex-shrink: 0;
}
#pal-wheel {
  display: block;
  cursor: crosshair;
  border-radius: 50%;
}
#pal-sl {
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  border-radius: 4px;
  cursor: crosshair;
  box-shadow: 0 0 4px rgba(0,0,0,0.5);
}

#pal-right-tools {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 0;
}

/* 5×5 格 */
#pal-5x5 {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 2px;
}
.pal-5x5-cell {
  aspect-ratio: 1;
  border-radius: 3px;
  border: 1px solid rgba(255,255,255,0.1);
  cursor: pointer;
  transition: transform 0.1s, box-shadow 0.1s;
}
.pal-5x5-cell:hover {
  transform: scale(1.15);
  z-index: 2;
  box-shadow: 0 2px 6px rgba(0,0,0,0.6);
}
.pal-5x5-cell.center {
  border: 2px solid #fff;
  box-shadow: 0 0 0 1px rgba(255,255,255,0.5);
}

/* 目前顏色色碼 */
.pal-cur-hex {
  font-size: 0.72rem;
  font-family: monospace;
  padding: 3px 6px;
  border-radius: 4px;
  background: #4ecca3;
  color: #000;
  text-align: center;
  letter-spacing: 1px;
  cursor: pointer;
  user-select: all;
}

.pal-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 3px;
  margin-bottom: 4px;
}

.pal-tab {
  padding: 2px 7px;
  font-size: 0.7rem;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--bg-item);
  color: var(--text-dim);
  cursor: pointer;
  transition: all 0.15s;
  font-family: var(--font);
}
.pal-tab:hover { border-color: var(--text-dim); color: var(--text); }
.pal-tab.active { background: var(--accent2); border-color: var(--accent2); color: #000; font-weight: 600; }

.pal-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 3px;
}

.pal-swatch {
  width: 18px; height: 18px;
  border-radius: 3px;
  border: 1px solid rgba(255,255,255,0.15);
  cursor: pointer;
  position: relative;
  flex-shrink: 0;
  transition: transform 0.1s, box-shadow 0.1s;
}
.pal-swatch:hover {
  transform: scale(1.25);
  z-index: 2;
  box-shadow: 0 2px 6px rgba(0,0,0,0.6);
}

.pal-remove {
  display: none;
  position: absolute;
  top: -5px; right: -5px;
  width: 12px; height: 12px;
  background: var(--accent);
  border-radius: 50%;
  font-size: 9px;
  line-height: 12px;
  text-align: center;
  color: #fff;
  cursor: pointer;
  z-index: 3;
}
.pal-swatch.removable:hover .pal-remove { display: block; }

.pal-section-title {
  font-size: 0.72rem;
  color: var(--text-dim);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-top: 4px;
}

.pal-empty {
  font-size: 0.75rem;
  color: var(--text-dim);
}

/* ===== 語言切換 ===== */
.lang-toggle {
  font-size: 12px;
  padding: 4px 10px;
  opacity: 0.75;
  text-decoration: none;
}
.lang-toggle:hover { opacity: 1; }

/* ===== HELP BUTTON ===== */
#btn-help {
  position: fixed;
  bottom: 18px;
  right: 18px;
  z-index: 1500;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 2px solid var(--accent2);
  background: var(--bg-mid);
  color: var(--accent2);
  font-size: 18px;
  font-weight: bold;
  cursor: pointer;
  box-shadow: 0 2px 10px rgba(0,0,0,0.4);
  transition: background 0.2s, transform 0.15s;
  line-height: 1;
}
#btn-help:hover {
  background: var(--accent2);
  color: #000;
  transform: scale(1.1);
}

/* ===== HELP MODAL ===== */
#help-modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 2500;
  background: rgba(0,0,0,0.6);
  display: flex;
  align-items: center;
  justify-content: center;
  backdrop-filter: blur(3px);
}
#help-modal {
  background: var(--bg-mid);
  border: 1px solid var(--border);
  border-radius: 10px;
  width: min(780px, 95vw);
  max-height: 82vh;
  display: flex;
  flex-direction: column;
  box-shadow: 0 8px 40px rgba(0,0,0,0.6);
  overflow: hidden;
}
#help-modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 20px;
  border-bottom: 1px solid var(--border);
  font-size: 15px;
  font-weight: 600;
  color: var(--accent2);
  flex-shrink: 0;
}
#help-close {
  background: none;
  border: none;
  color: var(--text-dim);
  font-size: 18px;
  cursor: pointer;
  padding: 0 4px;
  line-height: 1;
}
#help-close:hover { color: var(--accent); }

#help-modal-tabs {
  display: flex;
  gap: 2px;
  padding: 8px 12px 0;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
  flex-wrap: wrap;
}
.help-tab {
  padding: 6px 14px;
  border: none;
  border-radius: 6px 6px 0 0;
  background: var(--bg-item);
  color: var(--text-dim);
  font-size: 12px;
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
  white-space: nowrap;
}
.help-tab:hover { background: var(--bg-hover); color: var(--text); }
.help-tab.active { background: var(--bg-panel); color: var(--accent2); font-weight: 600; }

#help-modal-body {
  overflow-y: auto;
  padding: 20px 24px;
  flex: 1;
  min-height: 0;
}
.help-page { display: none; }
.help-page.active { display: block; }

.help-page h3 {
  font-size: 16px;
  color: var(--accent2);
  margin-bottom: 16px;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--border);
}
.help-section { margin-bottom: 18px; }
.help-section h4 {
  font-size: 13px;
  color: var(--accent);
  margin-bottom: 8px;
}
.help-section ul {
  list-style: none;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 5px;
}
.help-section ul li {
  font-size: 13px;
  color: var(--text);
  padding-left: 14px;
  position: relative;
  line-height: 1.5;
}
.help-section ul li::before {
  content: '›';
  position: absolute;
  left: 0;
  color: var(--accent2);
}
.help-section ul li strong { color: #fff; }
.help-section ul li code {
  background: var(--bg-dark);
  padding: 1px 5px;
  border-radius: 3px;
  font-size: 11px;
  color: var(--accent2);
}

/* 工具卡片 */
.help-tools-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}
.help-tool-card {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  background: var(--bg-item);
  border-radius: 7px;
  padding: 10px 12px;
  font-size: 13px;
  color: var(--text);
  line-height: 1.5;
}
.help-tool-card .tool-icon {
  font-size: 22px;
  flex-shrink: 0;
  line-height: 1.3;
}
.help-tool-card strong { color: #fff; }

/* 快捷鍵表格 */
.help-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}
.help-table th {
  text-align: left;
  padding: 6px 10px;
  color: var(--text-dim);
  border-bottom: 1px solid var(--border);
}
.help-table td {
  padding: 5px 10px;
  border-bottom: 1px solid rgba(255,255,255,0.04);
  color: var(--text);
}
.help-table-sep {
  background: var(--bg-panel);
  color: var(--accent);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.05em;
  padding: 4px 10px !important;
}
kbd {
  display: inline-block;
  background: var(--bg-dark);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 1px 6px;
  font-size: 11px;
  font-family: monospace;
  color: var(--accent2);
}

/* ===== TOAST ===== */
.toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  background: var(--accent2);
  color: #000;
  padding: 8px 20px;
  border-radius: 20px;
  font-size: 0.85rem;
  font-weight: 600;
  opacity: 0;
  transition: opacity 0.2s, transform 0.2s;
  z-index: 999;
  pointer-events: none;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* ===== TREE RIGHT-CLICK CONTEXT MENU ===== */
.tree-ctx-menu {
  position: fixed;
  z-index: 2000;
  background: var(--bg-mid);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 4px 0;
  min-width: 160px;
  box-shadow: 0 4px 16px rgba(0,0,0,0.5);
  user-select: none;
}
.ctx-item {
  padding: 7px 16px;
  font-size: 13px;
  cursor: pointer;
  color: var(--text);
  white-space: nowrap;
}
.ctx-item:hover {
  background: var(--bg-hover);
  color: var(--accent2);
}

/* ===== 貼入圖層按鈕 highlight ===== */
#btn-paste-layer.highlight,
#btn-paste-layer[class*="highlight"] {
  background: linear-gradient(90deg, #4ecca3, #2ecc9b);
  color: #fff;
  border-color: transparent;
  animation: pulse-glow 1.5s ease-in-out infinite;
}
@keyframes pulse-glow {
  0%, 100% { box-shadow: 0 0 4px #4ecca3; }
  50%       { box-shadow: 0 0 12px #4ecca3, 0 0 20px #4ecca380; }
}

/* ===== EDITOR FLOATING BAR ===== */
#editor-floating-bar {
  position: absolute;
  bottom: 28px; left: 10px;
  display: flex;
  align-items: center;
  gap: 6px;
  background: rgba(15, 20, 35, 0.88);
  backdrop-filter: blur(6px);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 4px 10px;
  z-index: 50;
  pointer-events: auto;
  box-shadow: 0 2px 12px rgba(0,0,0,0.5);
}
#editor-area { position: relative; }

.iv-name {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--accent2);
  max-width: 160px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.iv-size {
  font-size: 0.75rem;
  color: var(--text-dim);
  white-space: nowrap;
}
.iv-actions { display: flex; gap: 6px; }

/* ===== 選取工具列 ===== */
#sel-toolbar {
  display: flex;
  align-items: center;
  gap: 5px;
  padding: 4px 10px;
  background: rgba(78,204,163,0.12);
  border-bottom: 1px solid var(--accent2);
  flex-shrink: 0;
  flex-wrap: wrap;
}
.sel-tb-label {
  font-size: 0.75rem;
  color: var(--accent2);
  font-weight: 600;
  margin-right: 2px;
}

/* 像素倍增提示文字 */
.rs-hint-text {
  color: var(--accent2);
  font-size: 12px;
}

/* ===== 錨點格 ===== */
.anchor-grid {
  display: grid;
  grid-template-columns: repeat(3, 20px);
  grid-template-rows: repeat(3, 20px);
  gap: 2px;
}
.anchor-btn {
  width: 20px; height: 20px;
  background: var(--bg-item);
  border: 1px solid var(--border);
  border-radius: 3px;
  cursor: pointer;
  transition: background 0.1s;
}
.anchor-btn:hover  { background: var(--bg-hover); }
.anchor-btn.active { background: var(--accent2); border-color: var(--accent2); }

/* ===== EDITOR ROOT ===== */
#editor-root {
  display: flex;
  flex-direction: column;
  width: 100%;
  height: 100%;
  overflow: hidden;
}

/* ===== TOOLBAR ===== */
#toolbar {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 5px 10px;
  background: var(--bg-mid);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
  flex-wrap: wrap;
}

.tb-group {
  display: flex;
  align-items: center;
  gap: 4px;
}

.tb-sep {
  width: 1px;
  height: 22px;
  background: var(--border);
  margin: 0 4px;
}

.tb-btn {
  width: 30px; height: 30px;
  border: 1px solid var(--border);
  border-radius: 5px;
  background: var(--bg-item);
  color: var(--text);
  cursor: pointer;
  font-size: 1rem;
  display: flex; align-items: center; justify-content: center;
  transition: background 0.1s, border-color 0.1s;
  flex-shrink: 0;
}
.tb-btn:hover { background: var(--bg-hover); }
.tb-btn.active { background: var(--accent); border-color: var(--accent); color: #fff; }
.tb-btn[data-tool="varbrush"].active {
  background: linear-gradient(135deg, #ff6b6b, #ffd93d, #6bcb77, #4d96ff, #c77dff);
  border-color: transparent;
}
.tb-btn[data-tool="dodge"].active {
  background: linear-gradient(135deg, #fff9c4, #ffe082);
  color: #333;
  border-color: transparent;
}
.tb-btn[data-tool="blend"].active {
  background: linear-gradient(135deg, #4ecca3, #7986cb);
  border-color: transparent;
}

.tb-label {
  font-size: 0.78rem;
  color: var(--text-dim);
  display: flex;
  align-items: center;
  gap: 4px;
  cursor: pointer;
}

#toolbar select {
  background: var(--bg-item);
  border: 1px solid var(--border);
  border-radius: 4px;
  color: var(--text);
  padding: 3px 6px;
  font-size: 0.8rem;
  font-family: var(--font);
  cursor: pointer;
  outline: none;
}

/* 顏色選色器 */
.color-swatch-wrap {
  position: relative;
  cursor: pointer;
}
.color-swatch {
  width: 26px; height: 26px;
  border-radius: 4px;
  border: 2px solid var(--border);
  transition: border-color 0.15s;
}
.color-swatch:hover { border-color: var(--text-dim); }
.color-swatch-wrap input[type=color] {
  position: absolute; opacity: 0; width: 0; height: 0; pointer-events: none;
}

/* ===== WORKSPACE ===== */
#editor-workspace {
  flex: 1;
  display: flex;
  overflow: hidden;
}

#canvas-container {
  flex: 1;
  overflow: auto;
  display: flex;
  align-items: center;
  justify-content: center;
  background:
    repeating-conic-gradient(#1a1a1a 0% 25%, #222 0% 50%)
    0 0 / 20px 20px;
  padding: 20px;
}

#display-canvas {
  image-rendering: pixelated;
  image-rendering: crisp-edges;
  cursor: default;
  box-shadow: 0 0 0 1px rgba(255,255,255,0.1), 0 4px 20px rgba(0,0,0,0.6);
}

/* ===== LAYER PANEL ===== */
#layer-panel {
  width: 180px;
  min-width: 180px;
  background: var(--bg-mid);
  border-left: 1px solid var(--border);
  padding: 10px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
}

#layer-list {
  flex: 1;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.layer-item {
  display: flex;
  align-items: center;
  gap: 5px;
  background: var(--bg-item);
  border: 1px solid var(--border);
  border-radius: 5px;
  padding: 4px 6px;
  cursor: pointer;
  transition: background 0.1s;
  flex-shrink: 0;
}
.layer-item:hover { background: var(--bg-hover); }
.layer-item.active { border-color: var(--accent2); background: rgba(78,204,163,0.1); }

.layer-thumb {
  width: 24px; height: 24px;
  image-rendering: pixelated;
  border: 1px solid var(--border);
  border-radius: 2px;
  background: #333;
  flex-shrink: 0;
}

.layer-name {
  flex: 1;
  font-size: 0.78rem;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.layer-opacity {
  width: 40px;
  accent-color: var(--accent2);
  flex-shrink: 0;
}

/* 色塊閃爍回饋 */
.color-swatch.flash {
  animation: swatch-flash 0.3s ease;
}
@keyframes swatch-flash {
  0%   { transform: scale(1); }
  50%  { transform: scale(1.4); box-shadow: 0 0 8px var(--accent2); }
  100% { transform: scale(1); }
}

/* ===== SIMPLE MODAL ===== */
.simple-modal-overlay {
  position: fixed; inset: 0;
  background: rgba(0,0,0,0.6);
  z-index: 2000;
  display: flex; align-items: center; justify-content: center;
}
.simple-modal {
  background: var(--bg-mid);
  border: 1px solid var(--border);
  border-radius: 10px;
  width: 340px;
  box-shadow: 0 10px 40px rgba(0,0,0,0.8);
  overflow: hidden;
}
.simple-modal-title {
  padding: 12px 16px;
  font-weight: 700; font-size: 0.95rem;
  background: var(--bg-dark);
  color: var(--accent2);
  border-bottom: 1px solid var(--border);
}
.simple-modal-body {
  padding: 16px;
  display: flex; flex-direction: column; gap: 12px;
}
.modal-row {
  display: flex; align-items: center; gap: 10px;
}
.modal-row label { width: 50px; font-size: 0.82rem; color: var(--text-dim); flex-shrink: 0; }
.modal-row input[type=number], .modal-row select {
  flex: 1; background: var(--bg-item); border: 1px solid var(--border);
  border-radius: 4px; color: var(--text); padding: 5px 8px;
  font-size: 0.82rem; font-family: var(--font); outline: none;
}
.modal-row input[type=number]:focus, .modal-row select:focus { border-color: var(--accent2); }
.modal-row span { font-size: 0.8rem; color: var(--text-dim); }
.simple-modal-footer {
  padding: 10px 16px;
  border-top: 1px solid var(--border);
  display: flex; justify-content: flex-end; gap: 8px;
  background: var(--bg-dark);
}

/* ===== STATUS BAR ===== */
#editor-statusbar {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 3px 12px;
  background: var(--bg-mid);
  border-top: 1px solid var(--border);
  font-size: 0.75rem;
  color: var(--text-dim);
  flex-shrink: 0;
}
#sel-info { color: var(--accent2); font-weight: 600; }