:root { color-scheme: dark; --bg-color: #121212; --panel-bg: #1e1e1e; --accent-color: #03dac6; --accent-hover: #00b3a1; --font-color: #e0e0e0; --border-color: #333; }
* { box-sizing: border-box; }
body { font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif; background-color: var(--bg-color); color: var(--font-color); margin: 0; padding: 0; height: 100vh; overflow: hidden; display: flex; flex-direction: column; }
#app { display: flex; flex: 1; width: 100%; position: relative; overflow: hidden; }
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: var(--bg-color); }
::-webkit-scrollbar-thumb { background: #444; border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: var(--accent-color); }

.global-drop-overlay { position: fixed; top: 0; left: 0; width: 100vw; height: 100vh; background: rgba(18, 18, 18, 0.85); border: 4px dashed var(--accent-color); z-index: 99999; display: flex; flex-direction: column; align-items: center; justify-content: center; font-size: 2em; color: var(--accent-color); font-weight: bold; pointer-events: auto; }
.toast-modal { position: fixed; top: 50%; left: 50%; transform: translate(-50%, -50%); background: rgba(0, 0, 0, 0.9); color: #00ffaa; padding: 15px 30px; border: 1px solid var(--accent-color); border-radius: 8px; font-size: 1.1em; font-weight: bold; font-family: monospace; box-shadow: 0 10px 30px rgba(0, 0, 0, 0.8); z-index: 100000; pointer-events: none; opacity: 0; transition: opacity 0.3s ease; }
.toast-visible { opacity: 1; }

.sidebar { width: 440px; background-color: var(--panel-bg); border-right: 1px solid var(--border-color); display: flex; flex-direction: column; overflow-y: auto; flex-shrink: 0; z-index: 10; }
.center-area { flex-grow: 1; display: flex; flex-direction: column; overflow: hidden; position: relative; }
.top-panel { max-height: 45%; background-color: var(--panel-bg); border-bottom: 1px solid var(--border-color); padding: 12px; overflow-y: auto; flex-shrink: 0; z-index: 5; }
.right-panel { border-right: none; border-left: 1px solid var(--border-color); }

.layout-controls { display: flex; gap: 4px; background: #111; border-radius: 4px; padding: 2px; border: 1px solid #333; }
.btn-icon { background: transparent; color: #fff; border: none; cursor: pointer; border-radius: 3px; padding: 4px 8px; font-size: 1em; opacity: 0.4; transition: 0.2s; }
.btn-icon:hover { opacity: 1; background: #333; }
.btn-icon.active { opacity: 1; background: rgba(3, 218, 198, 0.15); box-shadow: inset 0 0 0 1px var(--accent-color); color: var(--accent-color); }

.top-layout-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(340px, 1fr)); gap: 12px; align-items: start; }
.panel-section { padding: 12px; border-bottom: 1px solid var(--border-color); }
.panel-title { font-size: 0.9em; font-weight: bold; color: var(--accent-color); margin-bottom: 10px; text-transform: uppercase; display: flex; justify-content: space-between; align-items: center; }

.drop-zone { border: 2px dashed var(--border-color); border-radius: 6px; padding: 12px; text-align: center; cursor: pointer; transition: 0.2s; background: #181818; color: #aaa; font-size: 0.9em;}
.drop-zone i { margin-right: 8px; color: var(--accent-color); }
.drop-zone:hover { border-color: var(--accent-color); background-color: #222; color: #fff;}

.input-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 6px; }
.input-grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 6px; }
.input-group { display: flex; flex-direction: column; gap: 4px; }
.input-group label { font-size: 0.7em; color: #aaa; white-space: nowrap; overflow: hidden; }
.input-group input, .input-group select { background-color: #121212; border: 1px solid var(--border-color); color: #fff; padding: 4px 6px; border-radius: 4px; font-size: 0.85em; width: 100%; transition: border-color 0.2s; }
.input-group input:focus { outline: none; border-color: var(--accent-color); }

.btn { background-color: var(--accent-color); color: #000; border: none; padding: 6px 10px; border-radius: 4px; font-weight: bold; font-size: 0.85em; cursor: pointer; transition: 0.2s; display: inline-flex; justify-content: center; align-items: center; gap: 6px; }
.btn:hover { background-color: var(--accent-hover); }
.btn:disabled { filter: grayscale(1); opacity: 0.5; cursor: not-allowed; }
.btn-small { padding: 4px 8px; font-size: 0.75em; }
.btn-secondary { background-color: #333; color: #fff; }
.btn-secondary:hover:not(:disabled) { background-color: #444; }

.palette-container { 
    display: flex; gap: 4px; margin-bottom: 10px; align-items: center; 
    border: 1px solid var(--border-color); padding: 6px; border-radius: 4px; 
    background: #151515; overflow-x: auto; scrollbar-width: none; -ms-overflow-style: none;
    cursor: grab; user-select: none;
}
.palette-container:active { cursor: grabbing; }
.palette-container::-webkit-scrollbar { display: none; }

.color-preset-btn { 
    flex-shrink: 0; width: 22px; height: 22px; border-radius: 4px; 
    border: 1px solid #555; cursor: pointer; display: inline-block; position: relative;
    transition: transform 0.1s;
}
.color-preset-btn:hover { transform: scale(1.1); border-color: #888; z-index: 2; }
.color-preset-btn.active { border-color: var(--accent-color); box-shadow: 0 0 6px var(--accent-color); transform: scale(1.1); z-index: 2; }

.custom-color-wrap {
    flex-shrink: 0; width: 22px; height: 22px; border-radius: 4px; border: 1px dashed #777;
    display: flex; align-items: center; justify-content: center; cursor: pointer;
    position: relative; overflow: hidden; background: transparent; color: #888;
    margin-left: auto; transition: all 0.2s;
}
.custom-color-wrap:hover { border-color: var(--accent-color); color: var(--accent-color); background: rgba(3,218,198,0.1); }
.custom-color-wrap input[type="color"] { position: absolute; opacity: 0; width: 200%; height: 200%; top: -50%; left: -50%; cursor: pointer; }

.loop-toggle-btn { background: #111; border: 1px solid #444; border-radius: 4px; padding: 0 12px; color: #555; cursor: pointer; transition: all 0.2s; height: 20px; display: flex; align-items: center; justify-content: center; width: 100%;}
.loop-toggle-btn:hover { border-color: #666; color: #aaa; }
.loop-toggle-btn.active { color: var(--accent-color); border-color: var(--accent-color); background: rgba(3, 218, 198, 0.05); }

.anim-preview-canvas { border: 1px solid #444; border-radius: 4px; image-rendering: pixelated; width: 144px; height: 144px; flex-shrink: 0; background-color: #111;}

.monster-card { background-color: #151515; border: 1px solid #333; border-radius: 6px; padding: 10px; margin-bottom: 10px; transition: all 0.2s ease; }
.monster-card.entity-active { border-color: #555; background-color: #1a1a1a; box-shadow: 0 4px 12px rgba(0,0,0,0.5); }
.monster-card-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 8px; font-size: 0.85em; font-weight: bold; color: #ddd; cursor: pointer; }

.action-tabs { display: flex; flex-wrap: wrap; gap: 6px; margin: 10px 0; padding-top: 10px; border-top: 1px dashed #333; }
.tab-btn { background: transparent; border: 1px dashed #555; border-radius: 4px; padding: 6px 10px; color: #666; cursor: pointer; transition: all 0.2s; display: flex; align-items: center; gap: 6px; }
.tab-btn i { font-size: 1.1em; }
.tab-btn:hover { border-color: #888; color: #aaa; }
.tab-btn.configured { color: #ddd; border: 1px solid #777; background: #222; }
.tab-btn.active { color: #000; background: var(--accent-color); border: 1px solid var(--accent-color); box-shadow: 0 0 12px rgba(3, 218, 198, 0.6); font-weight: bold; }
.tab-btn.active i { color: #000; }
.tab-btn.add-btn { color: #888; background: transparent; border-style: dashed; padding: 6px 12px; }
.tab-btn.add-btn:hover { color: #fff; border-color: #888; }
.tab-label { font-size: 0.75em; font-family: monospace; max-width: 90px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-weight: bold; }

.action-edit-panel { background-color: #111; border: 1px solid #333; border-radius: 6px; padding: 10px; margin-top: 8px; position: relative; }
.action-edit-panel::before { content: ''; position: absolute; top: -6px; left: 20px; width: 10px; height: 10px; background: #111; border-top: 1px solid #333; border-left: 1px solid #333; transform: rotate(45deg); }
.action-edit-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 8px; border-bottom: 1px solid #222; padding-bottom: 6px; }
.action-title { font-size: 0.85em; font-weight: bold; color: var(--accent-color); display: flex; align-items: center; gap: 8px; }

.json-preview { width: 100%; flex-grow: 1; min-height: 120px; background-color: #0d0d0d; border: 1px solid var(--border-color); color: #00ffaa; font-family: monospace; font-size: 0.75em; padding: 10px; border-radius: 4px; resize: vertical; white-space: pre; overflow-x: auto; margin-bottom: 8px;}

.main-content { flex-grow: 1; display: flex; flex-direction: column; position: relative; background-color: #0a0a0a; overflow: hidden; }
.checkerboard-bg { background-image: linear-gradient(45deg, #ffffff 25%, transparent 25%, transparent 75%, #ffffff 75%, #ffffff), linear-gradient(45deg, #ffffff 25%, transparent 25%, transparent 75%, #ffffff 75%, #ffffff); background-size: 20px 20px; background-position: 0 0, 10px 10px; }

.preview-top { flex: 1; display: flex; align-items: center; justify-content: center; position: relative; overflow: hidden; border-bottom: 1px solid #000; }
.viewport-canvas { display: block; width: 100%; height: 100%; cursor: crosshair; }

.analysis-bottom { position: absolute; bottom: 0; left: 0; right: 0; z-index: 5; height: 5%; min-height: 40px; display: flex; background: var(--panel-bg); border-top: 1px solid var(--border-color); transition: all 0.35s cubic-bezier(0.25, 0.8, 0.25, 1); opacity: 0.6; overflow: hidden; }
.analysis-bottom:hover { height: 15%; min-height: 140px; opacity: 1; }
.chart-wrapper { flex: 1; display: flex; flex-direction: column; padding: 10px 20px; border-right: 1px solid #111; position: relative; }
.chart-wrapper h3 { margin: 0 0 5px 0; font-size: 0.7em; color: #888; font-weight: normal; transition: all 0.3s ease; }
.analysis-bottom:hover .chart-wrapper h3 { font-size: 0.85em; margin-bottom: 8px; color: #aaa; }
.chart-container { flex: 1; position: relative; min-height: 20px; overflow: hidden; }
.chart-canvas { width: 100%; height: 100%; display: block; cursor: crosshair; }
.chart-tooltip { position: fixed; background: rgba(0, 0, 0, 0.85); color: #03dac6; padding: 8px 12px; border: 1px solid #03dac6; border-radius: 4px; font-size: 13px; font-family: monospace; pointer-events: none; z-index: 9999; transform: translate(15px, 15px); box-shadow: 0 4px 10px rgba(0,0,0,0.5); line-height: 1.5; }
.empty-placeholder { display: flex; flex-direction: column; align-items: center; justify-content: center; height: 100%; color: #666; width: 100%; }

.history-controls { 
    display: flex; 
    flex-wrap: wrap;
    gap: 8px; 
    padding: 8px 12px; 
    border-bottom: 1px solid var(--border-color); 
    background: #181818; 
    align-items: center;
}
.btn, .btn-small {
    white-space: nowrap !important;
    flex-shrink: 0 !important;
}

/* ====== 横向瀑布流全局/动作预览区域样式 ====== */
.preview-container { position: relative; background: #181818; border-bottom: 1px solid #000; box-shadow: inset 0 -4px 10px rgba(0,0,0,0.3); z-index: 6; flex-shrink: 0; }
.preview-controls { position: absolute; top: 12px; right: 15px; display: flex; gap: 4px; background: rgba(17, 17, 17, 0.85); padding: 4px; border-radius: 4px; border: 1px solid #333; z-index: 10; backdrop-filter: blur(4px);}

/* 智能 Grid 横向流 */
.preview-bar { 
    display: flex; 
    flex-direction: row; 
    flex-wrap: nowrap; 
    gap: 12px; 
    padding: 12px 15px; 
    padding-right: 90px; 
    overflow-x: auto; 
    overflow-y: hidden; 
    align-items: flex-start; 
    scrollbar-width: thin; 
}
.preview-bar::-webkit-scrollbar { height: 8px; }

.preview-item { display: flex; flex-direction: column; align-items: center; background: #111; border: 1px solid #333; border-radius: 6px; padding: 10px; width: 160px; transition: transform 0.2s, border-color 0.2s, box-shadow 0.2s;}
.preview-item:hover { transform: translateY(-2px); border-color: #555;}
.preview-item.is-active-action {
    border-color: var(--accent-color);
    box-shadow: 0 0 12px rgba(3, 218, 198, 0.4);
    transform: translateY(-2px);
    background: #1a1a1a;
}
.preview-title { font-size: 0.85em; color: var(--accent-color); margin-top: 8px; font-family: monospace; font-weight: bold; text-align: center; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; width: 100%; }
.preview-canvas-large { width: 138px; height: 138px; image-rendering: pixelated; border: 1px solid #222; border-radius: 4px; flex-shrink: 0; }

/* 大图预览与导出模态框样式 */
.preview-modal-overlay { position: fixed; top: 0; left: 0; width: 100vw; height: 100vh; background: rgba(0, 0, 0, 0.85); backdrop-filter: blur(4px); z-index: 999999; display: flex; align-items: center; justify-content: center; }
.preview-modal-card { 
    background: #181818; 
    border: 1px solid #444; 
    border-radius: 8px; 
    padding: 25px; 
    box-shadow: 0 10px 40px rgba(0,0,0,0.8); 
    display: flex; 
    flex-direction: column; 
    align-items: center; 
    gap: 20px; 
    min-width: 400px;
    position: relative; 
    animation: modalPop 0.2s ease-out; 
}
@keyframes modalPop { 0% { transform: scale(0.9); opacity: 0; } 100% { transform: scale(1); opacity: 1; } }

.modal-close-btn { position: absolute; top: 10px; right: 15px; background: none; border: none; color: #888; font-size: 1.5em; cursor: pointer; transition: 0.2s; }
.modal-close-btn:hover { color: #fff; }
.modal-canvas-container { 
    width: 500px; 
    height: 500px; 
    max-width: 85vw; 
    max-height: 65vh; 
    border: 1px solid #333; 
    border-radius: 4px; 
    background: #111; 
    overflow: hidden; 
}
.modal-title { color: var(--accent-color); font-weight: bold; font-size: 1.2em; font-family: monospace; display: flex; align-items: center; gap: 8px; margin-top: -5px; }
.modal-export-group { display: flex; gap: 10px; width: 100%; }
.modal-export-group .btn { flex: 1; padding: 10px; font-size: 1em; }
.anim-preview-canvas { cursor: crosshair; }
.preview-item { cursor: zoom-in; }

/* ====== 右侧 JSON 抽屉面板样式 (挤压式) ====== */
.json-side-panel {
    position: relative; 
    height: 100%;
    background-color: var(--panel-bg);
    border-left: 1px solid var(--border-color);
    z-index: 50;
    display: flex;
    flex-direction: column;
    overflow: hidden; 
    flex-shrink: 0;   
    transition: width 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
    box-shadow: -2px 0 10px rgba(0,0,0,0.2);
}

.json-side-panel.is-dragging {
    transition: none; 
}

/* 拖拽热区 */
.json-resizer {
    position: absolute;
    top: 0;
    left: 0; 
    width: 6px;
    height: 100%;
    cursor: ew-resize;
    z-index: 51;
    background: transparent;
    border-left: 1px solid rgba(255, 255, 255, 0.1);
    transition: background 0.2s;
}

.json-resizer:hover, .json-side-panel.is-dragging .json-resizer {
    background: rgba(3, 218, 198, 0.5);
}

/* 收起时显示的竖排提示文字 */
.json-collapsed-text {
    position: absolute;
    left: 0;
    top: 0;
    width: 40px;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    writing-mode: vertical-rl;
    color: #888;
    font-size: 0.9em;
    letter-spacing: 2px;
    pointer-events: none;
}

/* 内部实际内容的容器 */
.json-panel-content {
    height: 100%;
    display: flex;
    flex-direction: column;
    padding: 12px;
    box-sizing: border-box;
}

/* ================= 动作面板高密度布局工具类 ================= */
.dense-grid { display: grid; gap: 4px; }
.dense-grid-4 { grid-template-columns: repeat(4, 1fr); }
.dense-grid-5 { grid-template-columns: 1fr 1.2fr 1fr 1fr 1.5fr; } 
.dense-grid-6 { grid-template-columns: repeat(6, 1fr); }
.dense-grid .input-group label { margin-bottom: -2px; font-size: 0.65em; letter-spacing: -0.5px; }
.dense-grid .input-group input { padding: 2px 4px; font-family: monospace; }

/* ================= 动作面板说明型模块样式 ================= */
.dense-grid-2 { grid-template-columns: repeat(2, 1fr); }

.advanced-settings-wrapper {
    border-top: 1px dashed #333;
    padding-top: 8px;
    margin-top: 8px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.setting-module {
    background: rgba(0, 0, 0, 0.25);
    border: 1px solid #222;
    border-radius: 4px;
    padding: 6px;
}

.module-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    margin-bottom: 6px;
    padding-bottom: 4px;
    border-bottom: 1px solid #1a1a1a;
}

.module-title {
    font-size: 0.7em;
    color: var(--accent-color);
    font-weight: bold;
    display: flex;
    gap: 4px;
    align-items: center;
}

.module-desc {
    font-size: 0.6em;
    color: #666;
    letter-spacing: 0;
}

/* 并排表单与清空按钮 */
.space-row {
    display: flex;
    gap: 6px;
    align-items: flex-end;
}

.clear-btn {
    background: transparent;
    border: 1px dashed #444;
    color: #555;
    border-radius: 4px;
    height: 23px;
    width: 28px;
    cursor: pointer;
    transition: 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.clear-btn:hover {
    border-color: #ff4444;
    color: #ff4444;
    background: rgba(255, 68, 68, 0.1);
}

/* ================= 进阶模块操作按钮组 ================= */
.action-btn-group {
    display: flex;
    gap: 4px;
    flex-shrink: 0;
}

.action-icon-btn {
    background: transparent;
    border: 1px dashed #444;
    color: #888;
    border-radius: 4px;
    height: 23px;
    width: 26px;
    cursor: pointer;
    transition: 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* 复制(同步)按钮 Hover 效果 */
.action-icon-btn:hover {
    border-color: var(--accent-color);
    color: var(--accent-color);
    background: rgba(3, 218, 198, 0.1);
}

/* 橡皮擦(危险操作)按钮 Hover 效果 */
.action-icon-btn.danger-btn:hover {
    border-color: #ff4444;
    color: #ff4444;
    background: rgba(255, 68, 68, 0.1);
}

/* ================= 按钮组视觉隔离与底板 ================= */
/* 竖向分割线 */
.btn-divider {
    width: 1px;
    height: 18px;
    background-color: #333;
    margin: 0 4px;
}

/* 批量操作专属深色底板 */
.batch-actions-bg {
    background: rgba(0, 0, 0, 0.4);
    padding: 2px;
    border-radius: 4px;
    border: 1px solid #1a1a1a;
    display: flex;
    gap: 2px;
}

/* 去除底板内按钮的默认边框，使其更融为一体 */
.batch-actions-bg .action-icon-btn {
    border-color: transparent;
    height: 21px; 
    width: 24px;
}

.batch-actions-bg .action-icon-btn:hover {
    border-color: var(--accent-color);
}
.batch-actions-bg .danger-btn:hover {
    border-color: #ff4444;
}

/* ================= 像素编辑模态框专属样式 (顶级生产力版) ================= */
.pem-overlay { position: fixed; top: 0; left: 0; width: 100vw; height: 100vh; background: rgba(0, 0, 0, 0.85); backdrop-filter: blur(5px); z-index: 999999; display: flex; align-items: center; justify-content: center; }
.pem-modal { background: var(--panel-bg); width: 92vw; height: 92vh; border: 1px solid #3c3c3c; border-radius: 8px; display: flex; flex-direction: column; box-shadow: 0 10px 50px rgba(0,0,0,0.9); overflow: hidden; animation: modalPop 0.2s ease-out; }

/* 顶部标题栏 */
.pem-header { display: flex; justify-content: space-between; align-items: center; padding: 12px 20px; background: #252526; border-bottom: 1px solid #3c3c3c; user-select: none; }
.pem-title { font-size: 1.1em; font-weight: bold; color: #fff; letter-spacing: 1px; display: flex; align-items: center; }
.pem-close-btn { background: transparent; border: none; color: #888; font-size: 1.5em; cursor: pointer; transition: transform 0.2s, color 0.2s; padding: 0 4px; outline: none; display: flex; align-items: center; justify-content: center; }
.pem-close-btn:hover { color: #ff5252; transform: scale(1.15) rotate(90deg); }

/* 工具栏主体 */
.pem-toolbar { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; padding: 8px 12px; background: #2d2d2d; border-bottom: 1px solid #3c3c3c; user-select: none; }

/* 工具分组底板 (UI提升的核心) */
.pem-tool-group { display: flex; align-items: center; background: #1e1e1e; padding: 3px; border-radius: 6px; border: 1px solid #333; gap: 2px; }
.group-label { color: #888; font-size: 0.8em; margin: 0 8px 0 6px; }

/* 工具按钮 */
.pem-tool-btn { display: flex; align-items: center; gap: 6px; background: transparent; border: none; color: #ccc; padding: 6px 10px; border-radius: 4px; cursor: pointer; font-size: 0.85em; transition: all 0.2s ease; outline: none; white-space: nowrap; }
.pem-tool-btn:hover:not(:disabled) { background: #3c3c3c; color: #fff; }
.pem-tool-btn.active { color: rgb(255, 171, 0); font-weight: bold; box-shadow: inset 0 0 0 1px rgb(255, 171, 0); }
.pem-tool-btn.icon-only { padding: 6px 8px; font-size: 1em; }
.pem-tool-btn:disabled { opacity: 0.3; cursor: not-allowed; filter: grayscale(100%); }

/* 动态高亮的“应用”按钮 */
.pem-tool-btn.success-highlight { background: #00c853; color: #fff; font-weight: bold; box-shadow: 0 0 10px rgba(0,200,83,0.3); border: 1px solid #00e676; }
.pem-tool-btn.success-highlight:hover { background: #00e676; box-shadow: 0 0 15px rgba(0,200,83,0.6); }

/* 分割线与拾色器 */
.pem-divider { width: 1px; height: 16px; background: #444; margin: 0 4px; }
.pem-color-picker-wrap { width: 24px; height: 24px; border-radius: 4px; overflow: hidden; border: 1px solid #555; margin: 0 4px; position: relative; }
.pem-color-input { position: absolute; width: 150%; height: 150%; top: -25%; left: -25%; cursor: pointer; border: none; padding: 0; background: none; }

.pem-slider-group { display: flex; align-items: center; font-size: 0.85em; color: #aaa; gap: 4px; }
.pem-hint-text { font-size: 0.75em; color: #777; text-align: left; margin-top: auto; line-height: 1.6; background: #151515; padding: 10px; border-radius: 4px; border: 1px solid #222; }

/* 核心布局：左右分割 */
.pem-body { display: flex; flex: 1; overflow: hidden; background: #111; }

/* 左侧：绘画主区 */
.pem-main-canvas-wrapper { flex: 1; display: flex; align-items: center; justify-content: center; overflow: hidden; position: relative; cursor: crosshair; border-right: 1px solid #333; outline: none; }
.pem-main-canvas { image-rendering: pixelated; box-shadow: 0 4px 30px rgba(0,0,0,0.6); transform-origin: top left; }
.pem-grid-canvas { position: absolute; top: 0; left: 0; width: 100%; height: 100%; pointer-events: none; z-index: 5; }
.pem-overlay-cursor { position: absolute; pointer-events: none; z-index: 10; display: none; }

/* 右侧：侧边栏 */
.pem-sidebar { width: 320px; background: #181818; display: flex; flex-direction: column; padding: 15px; gap: 15px; flex-shrink: 0; overflow-y: auto; }
.pem-preview-box { border: 1px solid #333; background: #1e1e1e; border-radius: 6px; padding: 12px; display: flex; flex-direction: column; align-items: center; gap: 10px; }
.pem-preview-title { font-size: 0.85em; font-weight: bold; color: #888; width: 100%; text-align: left; border-bottom: 1px solid #333; padding-bottom: 8px; margin-bottom: 4px; }
.pem-preview-canvas { image-rendering: pixelated; border: 1px solid #000; background-color: #111; border-radius: 4px; }

/* ================= 资产文件下载警告高亮 ================= */
.warning-highlight {
    background-color: #ff9800 !important;
    color: #000 !important;
    font-weight: bold;
    border: 1px solid #fff;
    animation: pulseWarning 1.5s infinite;
}
.warning-highlight i {
    color: #000 !important;
}

@keyframes pulseWarning {
    0% { box-shadow: 0 0 0 0 rgba(255, 152, 0, 0.7); }
    70% { box-shadow: 0 0 0 6px rgba(255, 152, 0, 0); }
    100% { box-shadow: 0 0 0 0 rgba(255, 152, 0, 0); }
}

        .draggable-group { cursor: grab; }
        .draggable-group:active { cursor: grabbing; }
        .draggable-group.is-dragging { opacity: 0.3; border: 1px dashed var(--accent-color); }
        
        /* 提升文字颜色的亮度和可读性 */
        .pem-modal, .pem-title, .pem-tool-btn, .group-label, label {
            color: #e2e2e2 !important;
            text-shadow: 1px 1px 2px rgba(0,0,0,0.4);
        }
        .pem-hint-text {
            color: #ffffff !important;
            font-size: 14px;
        }
        .pem-tool-btn .fas { color: #f0f0f0; }

        /* 防卡死 Loading 遮罩样式 */
        .pem-loading-overlay {
            position: absolute; top: 0; left: 0; right: 0; bottom: 0;
            background: rgba(0, 0, 0, 0.75);
            color: #fff;
            display: flex; flex-direction: column;
            justify-content: center; align-items: center;
            z-index: 9999999;
            font-size: 16px;
            font-weight: bold;
            border-radius: inherit;
        }
        .pem-spinner {
            border: 4px solid rgba(255, 255, 255, 0.2);
            border-top: 4px solid #fff;
            border-radius: 50%;
            width: 44px; height: 44px;
            animation: pem-spin 1s linear infinite;
            margin-bottom: 15px;
        }
        @keyframes pem-spin {
            0% { transform: rotate(0deg); }
            100% { transform: rotate(360deg); }
        }