/* ==========================================================
 * 草图画板 — Neumorphic · 中小窗口 · 主题统一
 * ========================================================== */

/* ===== 桥接主程序主题 token + neumorphic 设计系统 ===== */
:root {
    /* 表面 & 背景 —— 渐变而非纯色 */
    --sk-bg-window: var(--node-neu-bg, linear-gradient(145deg, #f0f4f8, #ffffff));
    --sk-bg-surface: var(--surface, #ffffff);
    --sk-bg-soft: var(--surface-soft, #f8fafc);
    --sk-bg-stage: #1a1d27;
    --sk-stage-grid: rgba(255,255,255,0.018);
    --sk-canvas-bg: #ffffff;
    --sk-thumb-bg: #ffffff;
    --sk-hover-hint-bg: rgba(15,23,42,0.78);
    --sk-hover-hint-text: #ffffff;
    --sk-hud-bg: rgba(15, 23, 42, 0.96);
    --sk-hud-border: rgba(255,255,255,0.18);
    --sk-hud-shadow: 0 2px 16px rgba(0,0,0,0.35);
    --sk-hud-text: #ffffff;
    --sk-hud-muted: rgba(255,255,255,0.82);

    /* 阴影 —— neumorphic 双向光影 */
    --sk-shadow-window: var(--neu-shadow-active,
        10px 10px 22px rgba(163,177,198,0.42),
        -10px -10px 22px rgba(255,255,255,0.48));
    --sk-shadow-canvas: var(--neu-shadow,
        6px 6px 14px rgba(163,177,198,0.32),
        -6px -6px 14px rgba(255,255,255,0.38));
    --sk-shadow-inset: var(--neu-inset,
        inset 3px 3px 6px rgba(163,177,198,0.22),
        inset -3px -3px 6px rgba(255,255,255,0.35));
    --sk-shadow-btn-hover: var(--neu-inset,
        inset 3px 3px 6px rgba(163,177,198,0.22),
        inset -3px -3px 6px rgba(255,255,255,0.35));

    /* 遮罩 */
    --sk-overlay-bg: var(--modal-overlay-bg, rgba(15,23,42,.38));

    /* 颜色 */
    --sk-text: var(--text, #0f172a);
    --sk-text-sub: var(--text-soft, #334155);
    --sk-text-muted: var(--text-muted, #64748b);
    --sk-accent: var(--accent, #2440ED);
    --sk-accent-dim: var(--accent-hover, #1d35c9);
    --sk-accent-soft: var(--accent-soft, #eff6ff);
    --sk-accent-contrast: var(--accent-contrast, #ffffff);
    --sk-danger: var(--danger, #ef4444);
    --sk-border: var(--line, #cbd5e1);
    --sk-border-strong: var(--line-strong, #b6c2d1);

    /* 圆角 */
    --sk-radius-sm: var(--radius-sm, 8px);
    --sk-radius-md: var(--radius-md, 12px);
    --sk-radius-lg: var(--radius-lg, 18px);

    /* 动效 */
    --sk-ease: cubic-bezier(0.22, 1, 0.36, 1);

    /* hover —— 方向感知：浅色背景加深，暗色背景提亮 */
    --sk-bg-hover: rgba(0, 0, 0, 0.04);
}

/* ============================================================
 *  节点框（不变）
 * ============================================================ */
.node-shell-sketch { --node-type-color: var(--type-sketch, var(--type-image)); }
.node-type-sketch .sketch-node-body {
    padding:0;
    background:var(--surface-soft, var(--bg-soft,#f8fafc));
    display:flex;
    align-items:center;
    justify-content:center;
    width:100%;
    height:100%;
    max-width:100%;
    max-height:100%;
}
.sketch-thumb-frame {
    position:relative;
    width:100%;
    height:100%;
    max-width:100%;
    max-height:100%;
    overflow:hidden;
    border-radius:6px;
    background:var(--sk-thumb-bg);
}
.sketch-thumb-image { width:100%; height:100%; object-fit:contain; background:var(--sk-thumb-bg); pointer-events:none; }
.sketch-hover-hint { position:absolute; left:50%; bottom:8px; transform:translateX(-50%) translateY(8px); background:var(--sk-hover-hint-bg); color:var(--sk-hover-hint-text); font-size:11px; padding:4px 10px; border-radius:999px; display:flex; align-items:center; gap:4px; opacity:0; pointer-events:none; transition:opacity .18s ease,transform .18s ease; backdrop-filter:blur(6px); }
.sketch-hover-hint .svg-icon { width:12px; height:12px; }
.node:hover .sketch-hover-hint { opacity:1; transform:translateX(-50%) translateY(0); }
.sketch-empty-state { display:flex; flex-direction:column; align-items:center; justify-content:center; gap:8px; padding:20px 16px; text-align:center; color:var(--text-muted,#64748b); }
.sketch-empty-state .node-empty-title { font-weight:600; color:var(--text,#0f172a); font-size:13px; }
.sketch-empty-state .node-empty-desc { font-size:11.5px; line-height:1.5; max-width:220px; }
.sketch-empty-state .sketch-open-btn { margin-top:4px; }

/* ============================================================
 *  遮罩层 — 轻量暗色半透明
 * ============================================================ */
#sketch-pad-overlay {
    position: fixed;
    inset: 0;
    z-index: 4200;
    display: none;
    align-items: center;
    justify-content: center;
    background: var(--sk-overlay-bg);
    backdrop-filter: var(--modal-overlay-filter, blur(8px));
    -webkit-backdrop-filter: var(--modal-overlay-filter, blur(8px));
    color: var(--sk-text);
    user-select: none;
    -webkit-user-select: none;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    opacity: 0;
    transition: opacity 0.2s var(--sk-ease);
}

#sketch-pad-overlay.show { display: flex; opacity: 1; }

/* ============================================================
 *  浮动卡片窗口 — 中小尺寸
 * ============================================================ */
.sketch-window {
    width: 1060px;
    max-width: 96vw;
    height: 720px;
    max-height: 94vh;
    display: flex;
    flex-direction: column;
    border-radius: var(--radius-xl, 24px);
    overflow: hidden;
    background: var(--sk-bg-window);
    box-shadow:
        var(--sk-shadow-window),
        0 0 0 1px var(--sk-border);
}
.sketch-window.is-large {
    width: 96vw;
    max-width: 96vw;
    height: 94vh;
    max-height: 94vh;
}

/* ============================================================
 *  顶部标题栏 — 36px 紧凑
 * ============================================================ */
.sketch-topbar {
    flex-shrink: 0;
    height: 38px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 10px;
    background: var(--modal-header-bg, linear-gradient(180deg, rgba(255,255,255,.5), rgba(255,255,255,0)));
    border-bottom: 1px solid var(--sk-border);
    z-index: 5;
}

.sketch-topbar-left,
.sketch-topbar-right { display: flex; align-items: center; gap: 4px; }

.sketch-topbar-name {
    font-size: 12px;
    font-weight: 600;
    color: var(--sk-text);
    padding: 2px 8px;
    border-radius: 5px;
    cursor: text;
    outline: none;
    min-width: 40px;
    max-width: 150px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    transition: background 0.12s ease;
}
.sketch-topbar-name:hover { background: var(--sk-bg-hover); }
.sketch-topbar-name.editing { background: var(--sk-bg-hover); overflow:visible; text-overflow:clip; }

.sketch-topbar-canvas-info {
    font-size: 10.5px;
    color: var(--sk-text-muted);
    font-variant-numeric: tabular-nums;
}

.sketch-topbar-btn {
    width: 30px;
    height: 30px;
    border-radius: 999px;
    background: transparent;
    border: none;
    color: var(--sk-text-sub);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.12s ease, color 0.12s ease;
}
.sketch-topbar-btn:hover { background: var(--sk-bg-hover); box-shadow: var(--sk-shadow-btn-hover); color: var(--sk-text); }
.sketch-topbar-btn:active { background: var(--sk-bg-hover); }
.sketch-topbar-btn:disabled { opacity: 0.34; cursor: not-allowed; box-shadow: none; }
.sketch-topbar-btn:disabled:hover { background: transparent; color: var(--sk-text-sub); }
.sketch-topbar-btn .svg-icon { width: 15px; height: 15px; }
.sketch-topbar-btn.primary { background: var(--sk-accent-dim); color: var(--sk-accent-contrast); }
.sketch-topbar-btn.primary:hover { background: var(--sk-accent); }
.sketch-topbar-btn.danger:hover { background: rgba(248,113,113,0.18); color: var(--sk-danger); }
.sketch-window-restore-icon { display: none; }
.sketch-topbar-btn.is-large .sketch-window-expand-icon { display: none; }
.sketch-topbar-btn.is-large .sketch-window-restore-icon { display: block; }

/* ============================================================
 *  主体区域 — 左工具栏 + 画布 + 右面板
 * ============================================================ */
.sketch-body {
    flex: 1 1 auto;
    display: flex;
    overflow: hidden;
    position: relative;
}

/* ============================================================
 *  左侧工具栏 — 扁平
 * ============================================================ */
.sketch-toolbar {
    flex-shrink: 0;
    width: 62px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    padding: 7px 5px;
    background: var(--sk-bg-soft);
    border-right: 1px solid var(--sk-border);
    z-index: 4;
}

.sketch-toolbar-sep { width: 20px; height: 1px; background: var(--sk-border); margin: 3px 0; }

.sketch-tool-btn {
    width: 52px;
    height: 46px;
    border-radius: 10px;
    border: none;
    background: transparent;
    color: var(--sk-text-sub);
    cursor: pointer;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 3px;
    transition: background 0.12s ease, color 0.12s ease;
    position: relative;
}
.sketch-tool-btn:hover { background: var(--sk-bg-hover); box-shadow: var(--sk-shadow-btn-hover); color: var(--sk-text); }
.sketch-tool-btn:active { background: var(--sk-bg-hover); }
.sketch-tool-btn .svg-icon { width: 17px; height: 17px; }
.sketch-tool-btn .sketch-tool-icon-head { width: 24px; height: 24px; stroke-width: 1.9; }
.sketch-tool-label {
    font-size: 10px;
    line-height: 1;
    font-weight: 650;
    letter-spacing: 0.01em;
    pointer-events: none;
}

/* 工具选中 */
.sketch-tool-btn.active {
    background: var(--sk-accent-soft);
    color: var(--sk-accent);
}
.sketch-tool-btn.active::before {
    content: "";
    position: absolute;
    left: -4px;
    top: 8px;
    bottom: 8px;
    width: 2px;
    border-radius: 2px;
    background: var(--sk-accent);
}

/* 工具选中统一使用当前主题默认强调色，不再按工具使用不同颜色 */

/* ============================================================
 *  画布舞台
 * ============================================================ */
.sketch-pad-stage {
    flex: 1 1 auto;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    background:
        repeating-conic-gradient(var(--sk-stage-grid) 0% 25%, transparent 0% 50%) 0 0 / 18px 18px,
        var(--sk-bg-stage);
    padding: 24px;
    overflow: hidden;
}

.sketch-canvas-host {
    position: relative;
    background: var(--sk-canvas-bg);
    box-shadow: none;
    outline: 1px solid var(--sk-border);
    border-radius: 0;
    overflow: hidden;
    touch-action: none;
    transform-origin: center center;
    will-change: transform;
}
.sketch-pad-stage.sketch-space-pan,
.sketch-pad-stage.sketch-space-pan .sketch-canvas-host { cursor: grab !important; }
.sketch-pad-stage.sketch-panning,
.sketch-pad-stage.sketch-panning .sketch-canvas-host { cursor: grabbing !important; }
.sketch-canvas-host canvas {
    display: block;
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    touch-action: none;
}
.sketch-canvas-host.pixel-view canvas {
    image-rendering: pixelated;
    image-rendering: crisp-edges;
}

/* 工具光标 */
.sketch-canvas-host[data-tool="brush"],
.sketch-canvas-host[data-tool="pencil"],
.sketch-canvas-host[data-tool="marker"],
.sketch-canvas-host[data-tool="line"],
.sketch-canvas-host[data-tool="eraser"] { cursor: none; }
#sketch-pad-overlay.sketch-show-system-cursor .sketch-canvas-host,
#sketch-pad-overlay.sketch-show-system-cursor .sketch-canvas-host canvas { cursor: default !important; }
.sketch-canvas-host[data-tool="picker"] { cursor: crosshair; }

/* ============================================================
 *  笔刷光标环
 * ============================================================ */
.sketch-brush-cursor {
    position: fixed;
    pointer-events: none;
    z-index: 200;
    border-radius: 50%;
    border: 1.5px solid var(--cursor-color, #000);
    background: var(--cursor-color-bg, rgba(0,0,0,0.06));
    transform: translate(-50%, -50%);
    opacity: 0;
    transition: opacity 0.08s ease;
    /* 双色描边环：白+黑确保在任何背景色上都可见 */
    box-shadow:
        0 0 0 0.5px rgba(255,255,255,0.55),
        0 0 0 1.5px rgba(0,0,0,0.45);
}
.sketch-brush-cursor.visible { opacity: 1; }
.sketch-brush-hardness-preview {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    border-radius: 50%;
    pointer-events: none;
    z-index: 0;
}
.sketch-brush-cursor-inner {
    position: absolute;
    top: 50%; left: 50%;
    width: 2px; height: 2px;
    background: var(--cursor-color, #000);
    border-radius: 50%;
    transform: translate(-50%, -50%);
}
.sketch-brush-cursor .crosshair-h,
.sketch-brush-cursor .crosshair-v {
    position: absolute;
    background: var(--cursor-color, #000);
    opacity: 0.4;
}
.sketch-brush-cursor .crosshair-h { top:50%; left:28%; right:28%; height:1px; transform:translateY(-50%); }
.sketch-brush-cursor .crosshair-v { left:50%; top:28%; bottom:28%; width:1px; transform:translateX(-50%); }

/* ============================================================
 *  HUD
 * ============================================================ */
.sketch-hud {
    position: fixed;
    pointer-events: none;
    z-index: 180;
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 14px;
    border-radius: 999px;
    background: var(--sk-hud-bg);
    border: 1px solid var(--sk-hud-border);
    box-shadow: var(--sk-hud-shadow);
    color: var(--sk-hud-text);
    font-size: 12px;
    font-weight: 600;
    font-variant-numeric: tabular-nums;
    opacity: 0;
    transition: opacity 0.12s ease;
}
.sketch-hud.show { opacity: 1; }
.sketch-hud-label { font-size: 10px; text-transform: uppercase; letter-spacing: 0.06em; color: var(--sk-hud-muted); }
.sketch-hud-value { font-size: 20px; font-weight: 800; color: var(--sk-hud-text); min-width: 36px; text-align: center; text-shadow: 0 1px 2px rgba(0,0,0,.45); }
.sketch-hud-preview {
    width: 30px; height: 30px;
    border-radius: 50%;
    background: var(--sk-accent-dim);
    border: 1px solid rgba(255,255,255,0.2);
}

/* ============================================================
 *  右侧属性面板 — 扁平
 * ============================================================ */
.sketch-panel {
    flex-shrink: 0;
    width: 248px;
    position: relative;
    background: var(--sk-bg-soft);
    border-left: 1px solid var(--sk-border);
    display: flex;
    flex-direction: column;
    overflow-y: auto;
    overflow-x: hidden;
    z-index: 4;
    transition: width 0.22s var(--sk-ease), opacity 0.18s ease;
    scrollbar-width: thin;
    scrollbar-color: var(--sk-border) transparent;
}
.sketch-panel-inner { padding: 12px; display: flex; flex-direction: column; gap: 14px; }

.sketch-panel-section { display: flex; flex-direction: column; gap: 6px; }
.sketch-panel-section > .sketch-color-wheel-wrap,
.sketch-panel-section > .sketch-current-color-row,
.sketch-panel-section > .sketch-bg-color-row,
.sketch-panel-section > .sketch-slider-group,
.sketch-panel-section > .sketch-canvas-size-row,
.sketch-panel-section > .sketch-clear-btn,
.sketch-panel-section > .sketch-toggle-row,
.sketch-panel-section > .sketch-quick-palette {
    width: 100%;
    box-sizing: border-box;
}

.sketch-panel-label {
    font-size: 10px;
    text-transform: uppercase;
    letter-spacing: 0.07em;
    color: var(--sk-text-muted);
    font-weight: 600;
}

/* ============================================================
 *  Material 风格 — Hue 滑条 + S/B 矩形 (CSS 渐变，无 Canvas)
 * ============================================================ */
.sketch-color-wheel-wrap {
    width: 100%;
    padding: 8px;
    border-radius: var(--sk-radius-sm);
    background: color-mix(in srgb, var(--sk-bg-surface) 62%, transparent);
    border: 1px solid color-mix(in srgb, var(--sk-border) 58%, transparent);
    box-shadow: none;
    flex-shrink: 0;
    box-sizing: border-box;
}

/* ── Hue 滑条 ── */
.sketch-cw-hue-bar {
    position: relative;
    width: 100%;
    height: 14px;
    border-radius: 7px;
    background: linear-gradient(to right,
        hsl(0,100%,50%), hsl(30,100%,50%), hsl(60,100%,50%),
        hsl(120,100%,50%), hsl(180,100%,50%),
        hsl(240,100%,50%), hsl(270,100%,50%), hsl(300,100%,50%),
        hsl(330,100%,50%), hsl(360,100%,50%)
    );
    cursor: pointer;
    touch-action: none;
}

.sketch-cw-hue-thumb {
    position: absolute;
    top: 50%;
    width: 18px; height: 18px;
    border-radius: 50%;
    border: 2px solid #fff;
    background: transparent;
    box-shadow: 0 0 6px rgba(0,0,0,0.42);
    transform: translate(-50%, -50%);
    pointer-events: none;
    z-index: 2;
}

/* ── S/B 矩形 ── */
.sketch-cw-sb-field {
    position: relative;
    width: 100%;
    height: 170px;
    margin-top: 8px;
    border-radius: 8px;
    cursor: crosshair;
    touch-action: none;
    /* 底层: 白→纯色（JS 动态更新 gradient） */
    background: linear-gradient(to right, #fff, #f00);
}
.sketch-cw-sb-field::after {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: inherit;
    /* 上层: 透明→黑（亮度覆盖） */
    background: linear-gradient(to top, #000, transparent);
    pointer-events: none;
}

/* ── S/B 取色指示点 ── */
.sketch-cw-sb-dot {
    position: absolute;
    width: 14px; height: 14px;
    border-radius: 50%;
    border: 2px solid #fff;
    pointer-events: none;
    transform: translate(-50%, -50%);
    box-shadow: 0 0 8px rgba(0,0,0,0.38);
    z-index: 5;
    transition: none;
    will-change: left, top;
}
.sketch-cw-sb-dot::after {
    content: '';
    position: absolute;
    top: 50%; left: 50%;
    width: 6px; height: 6px;
    border-radius: 50%;
    background: #fff;
    transform: translate(-50%, -50%);
}

/* 当前颜色芯片 */
.sketch-current-color-row {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 7px 8px;
    border-radius: var(--sk-radius-sm);
    background: var(--sk-bg-soft);
    box-shadow: var(--sk-shadow-inset);
    border: 1px solid color-mix(in srgb, var(--sk-border) 62%, transparent);
}
.sketch-current-color-dot {
    width: 30px; height: 30px;
    border-radius: 8px;
    border: 1px solid var(--sk-border-strong);
    flex-shrink: 0;
    background-image:
        linear-gradient(45deg, rgba(148,163,184,.28) 25%, transparent 25%),
        linear-gradient(-45deg, rgba(148,163,184,.28) 25%, transparent 25%),
        linear-gradient(45deg, transparent 75%, rgba(148,163,184,.28) 75%),
        linear-gradient(-45deg, transparent 75%, rgba(148,163,184,.28) 75%);
    background-size: 8px 8px;
    background-position: 0 0, 0 4px, 4px -4px, -4px 0;
    box-shadow: inset 0 0 0 2px rgba(255,255,255,0.55), 0 1px 4px rgba(15,23,42,0.14);
}
.sketch-color-hex-input {
    flex: 1;
    min-width: 0;
    background: transparent;
    border: none;
    color: var(--sk-text);
    font-family: 'SF Mono', 'Cascadia Code', ui-monospace, monospace;
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.04em;
    outline: none;
    padding: 4px 0;
    width: 70px;
}
.sketch-color-hex-input::placeholder { color: var(--sk-text-muted); }

/* ============================================================
 *  快捷色板 — 纯平
 * ============================================================ */
.sketch-quick-palette {
    display: grid;
    grid-template-columns: repeat(8, 1fr);
    gap: 5px;
}
.sketch-quick-swatch {
    aspect-ratio: 1;
    border-radius: 5px;
    border: 1px solid var(--sk-border);
    cursor: pointer;
    transition: transform 0.14s var(--sk-ease);
}
.sketch-quick-swatch:hover { transform: scale(1.14); z-index:2; }
.sketch-quick-swatch.active {
    box-shadow: 0 0 0 2px var(--sk-accent);
    border-color: transparent;
}

/* ============================================================
 *  滑块 — 扁平
 * ============================================================ */
.sketch-slider-group { display: flex; flex-direction: column; gap: 7px; }
.sketch-slider-row {
    display: grid;
    grid-template-columns: 30px minmax(0, 1fr) 52px;
    align-items: center;
    column-gap: 8px;
    padding: 6px 8px;
    border-radius: var(--sk-radius-sm);
    background: color-mix(in srgb, var(--sk-bg-surface) 62%, transparent);
    border: 1px solid color-mix(in srgb, var(--sk-border) 58%, transparent);
}

.sketch-slider-row label {
    font-size: 10px;
    color: var(--sk-text-muted);
    width: auto;
    flex-shrink: 0;
}

.sketch-slider-row input[type="range"] {
    --range-pct: 0%;
    grid-column: auto;
    width: 100%;
    min-width: 0;
    flex: 1;
    -webkit-appearance: none;
    appearance: none;
    height: 8px;
    background: linear-gradient(
        to right,
        var(--sk-accent) 0 var(--range-pct),
        color-mix(in srgb, var(--sk-border) 72%, transparent) var(--range-pct) 100%
    );
    box-shadow: var(--sk-shadow-inset);
    border-radius: 999px;
    outline: none;
    cursor: pointer;
}
.sketch-slider-row input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 18px; height: 18px;
    border-radius: 50%;
    background: var(--sk-accent);
    border: 2px solid var(--sk-bg-surface);
    box-shadow: 0 2px 8px color-mix(in srgb, var(--sk-accent) 34%, transparent);
    cursor: pointer;
    transition: transform 0.12s var(--sk-ease), box-shadow 0.12s ease;
}
.sketch-slider-row input[type="range"]::-webkit-slider-thumb:hover { transform: scale(1.2); }

.sketch-slider-row input[type="number"] {
    width: 48px;
    background: var(--sk-bg-soft);
    box-shadow: var(--sk-shadow-inset);
    border: 1px solid transparent;
    border-radius: 5px;
    padding: 3px 2px;
    color: var(--sk-text);
    font-size: 10.5px;
    font-weight: 600;
    text-align: center;
    outline: none;
    font-family: inherit;
    font-variant-numeric: tabular-nums;
    transition: border-color 0.12s ease;
}
.sketch-slider-row input[type="number"]:focus { border-color: var(--sk-accent-dim); }

.sketch-panel-value {
    display: none;
}

/* ============================================================
 *  压感开关 — 扁平
 * ============================================================ */
.sketch-toggle-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 7px 10px;
    border-radius: var(--sk-radius-sm);
    background: var(--sk-bg-soft);
    box-shadow: var(--sk-shadow-inset);
    border: 1px solid transparent;
    cursor: pointer;
    transition: background 0.12s ease, box-shadow 0.12s ease;
    user-select: none;
}
.sketch-toggle-row:hover { background: var(--sk-bg-hover); }
.sketch-toggle-label { display: flex; flex-direction: column; gap: 1px; }
.sketch-toggle-label-title { font-size: 11.5px; font-weight: 500; color: var(--sk-text); }
.sketch-toggle-label-desc { font-size: 10px; color: var(--sk-text-muted); }

.sketch-toggle-switch {
    position: relative;
    width: 36px; height: 20px;
    background: var(--toggle-bg, rgba(0,0,0,0.15));
    border-radius: 999px;
    flex-shrink: 0;
    transition: background 0.18s ease;
}
.sketch-toggle-switch::after {
    content: "";
    position: absolute;
    top: 2px; left: 2px;
    width: 16px; height: 16px;
    background: #fff;
    border-radius: 50%;
    transition: transform 0.18s var(--sk-ease);
}
.sketch-toggle-row.active .sketch-toggle-switch { background: var(--sk-accent-dim); }
.sketch-toggle-row.active .sketch-toggle-switch::after { transform: translateX(16px); }

/* ============================================================
 *  画布尺寸输入
 * ============================================================ */
.sketch-canvas-size-row {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    align-items: center;
    gap: 4px;
}
.sketch-canvas-size-row input {
    background: var(--sk-bg-surface);
    box-shadow: none;
    border: 1px solid var(--sk-border);
    border-radius: 5px;
    padding: 5px 4px;
    color: var(--sk-text);
    font-size: 10.5px;
    font-weight: 600;
    text-align: center;
    outline: none;
    font-family: inherit;
    font-variant-numeric: tabular-nums;
    transition: border-color 0.12s ease;
}
.sketch-canvas-size-row input:focus { border-color: var(--sk-accent-dim); }
.sketch-canvas-size-divider { color: var(--sk-text-muted); font-size: 12px; }

.sketch-bg-color-row {
    position: relative;
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 7px 8px;
    border-radius: var(--sk-radius-sm);
    background: var(--sk-bg-soft);
    border: 1px solid color-mix(in srgb, var(--sk-border) 62%, transparent);
    box-shadow: none;
}
.sketch-bg-color-btn {
    width: 30px;
    height: 30px;
    padding: 2px;
    border: 1px solid var(--sk-border-strong);
    border-radius: 8px;
    background: transparent;
    cursor: pointer;
    flex-shrink: 0;
}
.sketch-bg-color-preview {
    display: block;
    width: 100%;
    height: 100%;
    border-radius: 6px;
    background-color: #fff;
    background-image:
        linear-gradient(45deg, rgba(148,163,184,.24) 25%, transparent 25%),
        linear-gradient(-45deg, rgba(148,163,184,.24) 25%, transparent 25%),
        linear-gradient(45deg, transparent 75%, rgba(148,163,184,.24) 75%),
        linear-gradient(-45deg, transparent 75%, rgba(148,163,184,.24) 75%);
    background-size: 8px 8px;
    background-position: 0 0, 0 4px, 4px -4px, -4px 0;
}
.sketch-bg-color-row .sketch-color-hex-input {
    font-size: 11px;
    padding: 3px 4px;
    background: transparent;
    border: none;
    border-radius: 5px;
    flex: 1;
}

.sketch-bg-picker-popover {
    display: none;
    width: 100%;
    box-sizing: border-box;
    padding: 10px;
    border-radius: var(--sk-radius-sm);
    background: color-mix(in srgb, var(--sk-bg-surface) 72%, transparent);
    border: 1px solid color-mix(in srgb, var(--sk-border) 62%, transparent);
    box-shadow: none;
}
.sketch-bg-picker-popover.show { display: block; }
.sketch-bg-picker-title {
    margin-bottom: 8px;
    font-size: 10px;
    font-weight: 700;
    color: var(--sk-text-muted);
    letter-spacing: .06em;
    text-transform: uppercase;
}
.sketch-bg-cw-hue-bar {
    position: relative;
    width: 100%;
    height: 14px;
    border-radius: 999px;
    background: linear-gradient(to right,
        hsl(0,100%,50%), hsl(30,100%,50%), hsl(60,100%,50%),
        hsl(120,100%,50%), hsl(180,100%,50%), hsl(240,100%,50%),
        hsl(270,100%,50%), hsl(300,100%,50%), hsl(330,100%,50%), hsl(360,100%,50%)
    );
    cursor: pointer;
    touch-action: none;
}
.sketch-bg-cw-hue-thumb {
    position: absolute;
    top: 50%;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    border: 2px solid #fff;
    transform: translate(-50%, -50%);
    box-shadow: 0 0 0 1px rgba(15,23,42,.22);
    pointer-events: none;
}
.sketch-bg-cw-sb-field {
    position: relative;
    width: 100%;
    height: 128px;
    margin-top: 8px;
    border-radius: 8px;
    background: linear-gradient(to right, #fff, #f00);
    cursor: crosshair;
    touch-action: none;
    overflow: hidden;
}
.sketch-bg-cw-sb-field::after {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, #000, transparent);
    pointer-events: none;
}
.sketch-bg-cw-sb-dot {
    position: absolute;
    z-index: 2;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    border: 2px solid #fff;
    transform: translate(-50%, -50%);
    box-shadow: 0 0 0 1px rgba(15,23,42,.55);
    pointer-events: none;
}
.sketch-bg-picker-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    margin-top: 9px;
}
.sketch-bg-picker-preview {
    width: 34px;
    height: 22px;
    border-radius: 6px;
    border: 1px solid var(--sk-border-strong);
}
.sketch-bg-picker-close {
    height: 24px;
    padding: 0 12px;
    border-radius: 999px;
    border: 1px solid color-mix(in srgb, var(--sk-accent) 28%, transparent);
    background: color-mix(in srgb, var(--sk-accent-soft) 86%, transparent);
    color: var(--sk-accent);
    font-size: 10.5px;
    font-weight: 700;
    cursor: pointer;
}

/* 清空按钮 */
.sketch-clear-btn {
    background: transparent;
    border: 1px solid color-mix(in srgb, var(--sk-danger) 20%, transparent);
    border-radius: var(--sk-radius-sm);
    cursor: pointer;
    transition: background 0.12s ease;
}
.sketch-clear-btn:hover { background: color-mix(in srgb, var(--sk-danger) 10%, transparent); }
.sketch-clear-btn .svg-icon { width: 13px; height: 13px; }


/* ============================================================
 *  底部状态栏
 * ============================================================ */
.sketch-statusbar {
    flex-shrink: 0;
    min-height: 32px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 3px 8px;
    background: var(--sk-bg-soft);
    border-top: 1px solid var(--sk-border);
    font-size: 10.5px;
    color: var(--sk-text-muted);
    font-variant-numeric: tabular-nums;
}
.sketch-statusbar-actions {
    display: flex;
    align-items: center;
    gap: 3px;
    flex: 0 0 auto;
}
.sketch-statusbar-actions .sketch-topbar-btn {
    width: 26px;
    height: 26px;
    border-radius: var(--sk-radius-sm);
    color: var(--sk-text-sub);
    border: 1px solid transparent;
}
.sketch-statusbar-actions .sketch-topbar-btn:hover {
    border-color: var(--sk-border);
}
.sketch-statusbar-actions .sketch-topbar-btn.primary {
    background: var(--sk-accent-dim);
    color: var(--sk-accent-contrast);
}
.sketch-statusbar-actions .sketch-topbar-btn.danger:hover {
    color: var(--sk-danger);
    border-color: color-mix(in srgb, var(--sk-danger) 32%, transparent);
}
.sketch-statusbar-info {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 16px;
    min-width: 0;
    flex: 1 1 auto;
}
.sketch-statusbar-item { display: flex; align-items: center; gap: 3px; white-space: nowrap; }
.sketch-statusbar-item strong { color: var(--sk-text-sub); font-weight: 500; }
.sketch-statusbar-sep { color: var(--sk-border); }

.sketch-pressure-bar {
    width: 40px; height: 3px;
    border-radius: 999px;
    background: var(--sk-border);
    overflow: hidden;
}
.sketch-pressure-bar-fill {
    height: 100%;
    border-radius: 999px;
    background: var(--sk-accent-dim);
    transition: width 0.06s ease;
}

/* ============================================================
 *  未保存确认弹窗 — 使用画布统一 token
 * ============================================================ */
.sketch-unsaved-modal {
    position: absolute;
    inset: 0;
    z-index: 30;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 20px;
    background: var(--modal-overlay-bg, rgba(15, 23, 42, .38));
}
.sketch-unsaved-modal.show { display: flex; }
.sketch-unsaved-card {
    width: min(420px, 92vw);
    border-radius: var(--modal-radius, var(--sk-radius-lg));
    border: var(--modal-border, 1px solid var(--sk-border));
    background: var(--modal-bg, var(--sk-bg-window));
    color: var(--sk-text);
    overflow: hidden;
}
.sketch-unsaved-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 16px;
    padding: 18px 20px 14px;
    border-bottom: var(--modal-header-border, 1px solid var(--sk-border));
    background: var(--modal-header-bg, var(--sk-bg-soft));
}
.sketch-unsaved-kicker {
    margin-bottom: 5px;
    font-size: 11px;
    font-weight: 750;
    letter-spacing: .08em;
    color: var(--sk-accent);
}
.sketch-unsaved-header h3 {
    margin: 0;
    font-size: 16px;
    line-height: 1.3;
    font-weight: 750;
    color: var(--modal-title-text, var(--sk-text));
}
.sketch-unsaved-x {
    width: 30px;
    height: 30px;
    border-radius: var(--control-radius, var(--sk-radius-sm));
    border: var(--modal-close-border, 1px solid transparent);
    background: var(--modal-close-bg, transparent);
    color: var(--modal-close-text, var(--sk-text-sub));
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
}
.sketch-unsaved-x:hover {
    background: var(--modal-close-hover-bg, var(--sk-bg-hover));
    color: var(--modal-close-hover-text, var(--sk-danger));
    border: var(--modal-close-hover-border, 1px solid var(--sk-border));
}
.sketch-unsaved-x .svg-icon { width: 15px; height: 15px; }
.sketch-unsaved-body {
    padding: 18px 20px;
    background: var(--modal-body-bg, var(--sk-bg-window));
    color: var(--sk-text-sub);
    font-size: 13px;
    line-height: 1.7;
}
.sketch-unsaved-actions {
    display: flex;
    justify-content: flex-end;
    gap: 8px;
    padding: 14px 20px 18px;
    border-top: var(--modal-footer-border, 1px solid var(--sk-border));
    background: var(--modal-footer-bg, var(--sk-bg-soft));
}
.sketch-unsaved-btn {
    min-width: 76px;
    height: 32px;
    padding: 0 14px;
    border-radius: var(--control-radius, var(--sk-radius-sm));
    border: var(--control-border, 1px solid var(--sk-border));
    background: var(--control-bg, var(--sk-bg-surface));
    color: var(--control-text, var(--sk-text-sub));
    font-size: 12px;
    font-weight: 750;
    cursor: pointer;
}
.sketch-unsaved-btn:hover { background: var(--sk-bg-hover); color: var(--sk-text); }
.sketch-unsaved-btn.primary {
    border-color: var(--sk-accent-dim);
    background: var(--sk-accent-dim);
    color: var(--sk-accent-contrast);
}
.sketch-unsaved-btn.primary:hover { background: var(--sk-accent); }
.sketch-unsaved-btn.ghost {
    color: var(--sk-danger);
    border-color: color-mix(in srgb, var(--sk-danger) 30%, transparent);
    background: transparent;
}
.sketch-unsaved-btn.ghost:hover {
    background: color-mix(in srgb, var(--sk-danger) 10%, transparent);
}

/* ============================================================
 *  入场动画 — 简洁
 * ============================================================ */
@keyframes skWindowIn {
    from { opacity: 0; transform: scale(0.96) translateY(8px); }
    to   { opacity: 1; transform: scale(1) translateY(0); }
}
#sketch-pad-overlay.show .sketch-window {
    animation: skWindowIn 0.25s var(--sk-ease);
}

/* ============================================================
 *  响应式
 * ============================================================ */
@media (max-width: 1000px) {
    .sketch-window { width: 96vw; height: 90vh; }
}
@media (max-width: 720px) {
    .sketch-panel { width: 200px; }
    .sketch-toolbar { width: 54px; }
    .sketch-tool-btn { width: 46px; height: 42px; }
    .sketch-tool-label { font-size: 9px; }
}

/* ============================================================
 *  无阴影/无发光覆盖：草图画板窗口保持纯平矢量界面
 * ============================================================ */
#sketch-pad-overlay {
    backdrop-filter: none !important;
    -webkit-backdrop-filter: none !important;
}
#sketch-pad-overlay .sketch-window,
#sketch-pad-overlay .sketch-window * {
    box-shadow: none !important;
    text-shadow: none !important;
    filter: none !important;
}
#sketch-pad-overlay .sketch-window {
    border: 1px solid var(--sk-border);
}