/* ==========================================================
 *  Optics Lab - TRAE IDE 深色风格样式
 *  设计 Token 基于 TRAE IDE 配色体系
 * ========================================================== */

:root {
    /* ====== TRAE 设计 Token ====== */
    /* 背景 */
    --bg-base-default: #1A1B1D;
    --bg-base-secondary: #222427;
    --bg-base-tertiary: #2A2D31;
    --bg-overlay-l1: rgba(255, 255, 255, 0.06);
    --bg-overlay-l2: rgba(255, 255, 255, 0.08);
    --bg-brand-popup: rgba(50, 240, 140, 0.15);

    /* 品牌色 - 绿色 */
    --bg-brand: #32F08C;
    --status-primary-surface-l1: rgba(50, 240, 140, 0.12);

    /* 文字 */
    --text-default: #E5E7EB;
    --text-secondary: #9CA3AF;
    --text-tertiary: #6B7280;

    /* 边框 */
    --border-neutral-l1: rgba(224, 226, 242, 0.1);
    --border-neutral-l2: rgba(224, 226, 242, 0.16);

    /* 状态色 */
    --success: #32F08C;
    --danger: #F87171;
    --warning: #FBBF24;
    --cyan-highlight: #32F08C;
    --purple-accent: #A78BFA;

    /* 字体 */
    --font-family-base: -apple-system, BlinkMacSystemFont, "PingFang SC", "Segoe UI", sans-serif;
    --code-editor-font-family: "SF Mono", Menlo, Consolas, monospace;

    /* 间距 */
    --spacer-4: 4px;
    --spacer-6: 6px;
    --spacer-8: 8px;
    --spacer-12: 12px;
    --spacer-16: 16px;

    /* 圆角 */
    --radius-4: 4px;
    --radius-6: 6px;
    --radius-8: 8px;

    /* ====== 旧变量兼容映射 ====== */
    --deep-blue: var(--bg-base-default);
    --dark-blue: var(--bg-base-secondary);
    --glass-bg: var(--bg-overlay-l1);
    --glass-border: var(--border-neutral-l1);
    --glass-hover: var(--bg-overlay-l2);
    --text-primary: var(--text-default);
    --text-muted: var(--text-tertiary);
    --panel-bg: var(--bg-base-secondary);
    --panel-bg-solid: var(--bg-base-secondary);
    --border-soft: var(--border-neutral-l1);
    --border-axis: var(--border-neutral-l1);
    --slider-track: var(--bg-overlay-l2);
    --thumb-border: var(--bg-base-secondary);
    --readout-bg: var(--bg-overlay-l1);
    --readout-border: var(--border-neutral-l1);
    --warn-text: var(--warning);
    --low-text: var(--danger);
    --gray-text: var(--text-tertiary);
}

/* ============== 浅色主题 ============== */
[data-theme="light"] {
    --bg-base-default: #FFFFFF;
    --bg-base-secondary: #F5F6F8;
    --bg-base-tertiary: #ECEEF1;
    --bg-overlay-l1: rgba(0, 0, 0, 0.04);
    --bg-overlay-l2: rgba(0, 0, 0, 0.06);
    --bg-brand-popup: rgba(16, 185, 129, 0.12);
    --bg-brand: #10B981;
    --status-primary-surface-l1: rgba(16, 185, 129, 0.1);
    --text-default: #1F2328;
    --text-secondary: #57606A;
    --text-tertiary: #8B949E;
    --border-neutral-l1: rgba(0, 0, 0, 0.08);
    --border-neutral-l2: rgba(0, 0, 0, 0.14);
    --success: #10B981;
    --danger: #EF4444;
    --warning: #D97706;
    --cyan-highlight: #10B981;
    --purple-accent: #8B5CF6;

    /* 旧变量映射 */
    --deep-blue: var(--bg-base-default);
    --dark-blue: var(--bg-base-secondary);
    --glass-bg: var(--bg-overlay-l1);
    --glass-border: var(--border-neutral-l1);
    --glass-hover: var(--bg-overlay-l2);
    --text-primary: var(--text-default);
    --text-muted: var(--text-tertiary);
    --panel-bg: var(--bg-base-secondary);
    --panel-bg-solid: var(--bg-base-secondary);
    --border-soft: var(--border-neutral-l1);
    --border-axis: var(--border-neutral-l1);
    --slider-track: var(--bg-overlay-l2);
    --thumb-border: var(--bg-base-secondary);
    --readout-bg: var(--bg-overlay-l1);
    --readout-border: var(--border-neutral-l1);
    --warn-text: var(--warning);
    --low-text: var(--danger);
    --gray-text: var(--text-tertiary);
}

/* ============== 全局重置 ============== */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    -webkit-tap-highlight-color: transparent;
}

html, body {
    width: 100%;
    height: 100%;
    overflow: hidden;
    background: var(--bg-base-default);
    color: var(--text-default);
    font-family: var(--font-family-base);
    font-size: 13px;
    user-select: none;
    -webkit-user-select: none;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* 细窄深色滚动条（全局） */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}
::-webkit-scrollbar-track {
    background: transparent;
}
::-webkit-scrollbar-thumb {
    background: rgba(255,255,255,0.1);
    border-radius: 3px;
}
::-webkit-scrollbar-thumb:hover {
    background: rgba(255,255,255,0.2);
}
[data-theme="light"] ::-webkit-scrollbar-thumb {
    background: rgba(0,0,0,0.15);
}
[data-theme="light"] ::-webkit-scrollbar-thumb:hover {
    background: rgba(0,0,0,0.25);
}
* {
    scrollbar-width: thin;
    scrollbar-color: rgba(255,255,255,0.1) transparent;
}
[data-theme="light"] * {
    scrollbar-color: rgba(0,0,0,0.15) transparent;
}

/* ============== 应用 Grid 布局 ============== */
#app {
    display: grid;
    grid-template-columns: 48px 240px 1fr;
    grid-template-rows: 40px 1fr 24px;
    grid-template-areas:
        "titlebar titlebar titlebar"
        "rail     sidebar  canvas  "
        "statusbar statusbar statusbar";
    width: 100vw;
    height: 100vh;
    overflow: hidden;
    background: var(--bg-base-default);
    position: relative;
}

/* 属性面板可见时，扩展为 4 列（canvas 区域预留右侧空间） */
#app:has(#property-panel.visible) {
    grid-template-columns: 48px 240px 1fr 280px;
    grid-template-areas:
        "titlebar  titlebar  titlebar  titlebar"
        "rail      sidebar   canvas    props   "
        "statusbar statusbar statusbar statusbar";
}

/* ============== 加载层 ============== */
#loading-overlay {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    z-index: 20;
    pointer-events: none;
    transition: opacity 0.8s ease;
}
#particle-loader-canvas {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    display: block;
}

/* ============== 3D 画布 ============== */
#scene-canvas {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    display: block;
    touch-action: none;
    cursor: grab;
    will-change: transform;
    image-rendering: auto;
    backface-visibility: hidden;
}
#scene-canvas:active {
    cursor: grabbing;
}

/* ============== 通用 UI 元素 ============== */
.panel {
    background: var(--bg-base-secondary);
    border: 1px solid var(--border-neutral-l1);
    border-radius: var(--radius-6);
    color: var(--text-primary);
}

.section-title {
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.8px;
    text-transform: uppercase;
    color: var(--cyan-highlight);
    margin-bottom: 8px;
}

/* ==========================================================
 *  标题栏 #titlebar
 * ========================================================== */
#titlebar {
    grid-area: titlebar;
    height: 40px;
    background: var(--bg-base-secondary);
    border-bottom: 1px solid var(--border-neutral-l1);
    display: flex;
    align-items: center;
    padding: 0 10px;
    gap: 8px;
    z-index: 15;
    -webkit-app-region: drag;
}

/* 窗口控制灯 */
.traffic-lights {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 0 6px 0 2px;
}
.tl-dot {
    width: 11px;
    height: 11px;
    border-radius: 50%;
    display: inline-block;
}
.tl-red    { background: #FF5F57; }
.tl-yellow { background: #FEBC2E; }
.tl-green  { background: #28C840; }

/* 模式标签 chip */
.mode-chip {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    height: 24px;
    padding: 0 8px 0 6px;
    border: 1px solid var(--border-neutral-l2);
    border-radius: var(--radius-4);
    background: var(--bg-overlay-l1);
    color: var(--text-secondary);
    font-size: 12px;
    font-weight: 500;
    white-space: nowrap;
    -webkit-app-region: no-drag;
}
.mode-chip .mode-icon {
    color: var(--bg-brand);
}

/* 项目选择器 */
.project-selector {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    height: 26px;
    padding: 0 10px 0 8px;
    background: transparent;
    border: 1px solid transparent;
    border-radius: var(--radius-4);
    color: var(--text-default);
    font-size: 12px;
    font-weight: 500;
    cursor: pointer;
    transition: background 0.15s, border-color 0.15s;
    white-space: nowrap;
    -webkit-app-region: no-drag;
    font-family: inherit;
}
.project-selector:hover {
    background: var(--bg-overlay-l1);
    border-color: var(--border-neutral-l1);
}
.project-selector .chev {
    color: var(--text-tertiary);
}

.titlebar-spacer {
    flex: 1;
}

/* ============== 标题栏 FPS ============== */
.fps-wrap {
    position: relative;
    -webkit-app-region: no-drag;
}
.fps-counter {
    font-family: var(--code-editor-font-family);
    font-size: 11px;
    font-weight: 600;
    color: var(--bg-brand);
    background: var(--status-primary-surface-l1);
    border: 1px solid rgba(50, 240, 140, 0.2);
    border-radius: var(--radius-4);
    padding: 3px 8px;
    min-width: 64px;
    text-align: center;
    letter-spacing: 0.3px;
    cursor: pointer;
    transition: all 0.15s;
    font-family: var(--code-editor-font-family);
}
.fps-counter:hover {
    background: var(--bg-brand-popup);
    border-color: rgba(50, 240, 140, 0.35);
}
.fps-counter.warn {
    color: var(--warning);
    border-color: rgba(251, 191, 36, 0.3);
    background: rgba(251, 191, 36, 0.1);
}
.fps-counter.low {
    color: var(--danger);
    border-color: rgba(248, 113, 113, 0.3);
    background: rgba(248, 113, 113, 0.1);
}

.fps-panel {
    position: absolute;
    top: calc(100% + 6px);
    right: 0;
    width: 220px;
    background: var(--bg-base-secondary);
    border: 1px solid var(--border-neutral-l1);
    border-radius: var(--radius-8);
    padding: 12px 14px 10px;
    box-shadow: 0 8px 24px rgba(0,0,0,0.4);
    z-index: 100;
    display: none;
    animation: fadeSlide 0.18s ease;
}
.fps-panel.show { display: block; }
.fps-panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 8px;
    font-size: 12px;
    color: var(--text-tertiary);
}
.fps-panel-header span:last-child {
    font-family: var(--code-editor-font-family);
    color: var(--bg-brand);
    font-weight: 600;
    font-size: 12px;
}

#fps-slider {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    height: 4px;
    border-radius: 2px;
    background: linear-gradient(to right, var(--cyan-highlight) 0%, rgba(255,255,255,0.15) 0%);
    outline: none;
    cursor: pointer;
    margin: 0;
}
#fps-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: var(--cyan-highlight);
    border: 2px solid var(--bg-base-secondary);
    box-shadow: 0 0 6px rgba(50,240,140,0.4);
    cursor: pointer;
    transition: transform 0.1s;
}
#fps-slider::-webkit-slider-thumb:hover { transform: scale(1.15); }
#fps-slider::-moz-range-thumb {
    width: 14px; height: 14px; border-radius: 50%;
    background: var(--cyan-highlight); border: 2px solid var(--bg-base-secondary);
    box-shadow: 0 0 6px rgba(50,240,140,0.4); cursor: pointer;
}

.fps-ticks {
    display: flex;
    justify-content: space-between;
    margin-top: 6px;
    font-size: 10px;
    font-family: var(--code-editor-font-family);
    color: var(--text-tertiary);
}
.fps-ticks span {
    transition: all 0.15s;
    padding: 2px 4px;
    border-radius: var(--radius-4);
    cursor: pointer;
}
.fps-ticks span:hover {
    color: var(--cyan-highlight);
    background: var(--status-primary-surface-l1);
}

@keyframes fadeSlide {
    from { opacity: 0; transform: translateY(-6px); }
    to   { opacity: 1; transform: translateY(0); }
}

/* ============== 标题栏按钮组 ============== */
.titlebar-actions {
    display: flex;
    align-items: center;
    gap: 2px;
    -webkit-app-region: no-drag;
}

.icon-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: none;
    border-radius: var(--radius-4);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.15s ease;
    padding: 0;
}

.tb-btn {
    width: 28px;
    height: 28px;
}
.tb-btn:hover {
    background: var(--bg-overlay-l1);
    color: var(--text-default);
}
.tb-btn.danger {
    color: var(--danger);
}
.tb-btn.danger:hover {
    background: rgba(248, 113, 113, 0.12);
}
.tb-btn svg {
    width: 16px;
    height: 16px;
}

.tb-sep {
    width: 1px;
    height: 16px;
    background: var(--border-neutral-l1);
    margin: 0 4px;
}

/* ==========================================================
 *  活动栏 .activity-rail (48px)
 * ========================================================== */
.activity-rail {
    grid-area: rail;
    background: var(--bg-base-secondary);
    border-right: 1px solid var(--border-neutral-l1);
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 8px 0;
    gap: 2px;
}

.rail-item {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: none;
    border-radius: var(--radius-4);
    color: var(--text-tertiary);
    cursor: pointer;
    transition: all 0.15s;
    position: relative;
}
.rail-item:hover {
    color: var(--text-secondary);
    background: var(--bg-overlay-l1);
}
.rail-item.active {
    color: var(--text-default);
    background: var(--bg-overlay-l1);
}
.rail-item.active::before {
    content: '';
    position: absolute;
    left: -8px;
    top: 6px;
    bottom: 6px;
    width: 2px;
    background: var(--bg-brand);
    border-radius: 1px;
}

.rail-sep {
    width: 24px;
    height: 1px;
    background: var(--border-neutral-l1);
    margin: 6px 0;
}

.rail-spacer {
    flex: 1;
}

/* ==========================================================
 *  侧边器械面板 #instrument-bar (240px)
 * ========================================================== */
#instrument-bar {
    grid-area: sidebar;
    background: var(--bg-base-secondary);
    border-right: 1px solid var(--border-neutral-l1);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.sidebar-header {
    height: 40px;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 14px;
    border-bottom: 1px solid var(--border-neutral-l1);
}
.sidebar-title {
    font-size: 12px;
    font-weight: 600;
    color: var(--text-default);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}
.sidebar-status {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    font-size: 11px;
    color: var(--bg-brand);
    font-weight: 500;
}
.status-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--bg-brand);
    box-shadow: 0 0 6px var(--bg-brand);
    animation: pulse-dot 2s ease-in-out infinite;
}
@keyframes pulse-dot {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.sidebar-body {
    flex: 1;
    overflow-y: auto;
    padding: 10px 10px 8px;
}

.sidebar-section {
    margin-bottom: 4px;
}
.sidebar-section-label {
    font-size: 10px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.6px;
    color: var(--text-tertiary);
    padding: 4px 4px 6px;
}

/* 器械按钮网格 */
.instrument-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 6px;
}

.instrument-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    padding: 8px 4px;
    background: var(--bg-overlay-l1);
    border: 1px solid transparent;
    border-radius: var(--radius-6);
    cursor: pointer;
    transition: all 0.15s ease;
    font-family: inherit;
}
.instrument-btn:hover {
    background: var(--bg-overlay-l2);
    border-color: var(--border-neutral-l1);
}
.instrument-btn.selected {
    border-color: var(--cyan-highlight);
    background: var(--status-primary-surface-l1);
    box-shadow: 0 0 0 1px var(--cyan-highlight) inset;
}
.instrument-btn .icon {
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    line-height: 1;
}
.instrument-btn .icon svg {
    width: 24px;
    height: 24px;
}
.instrument-btn .name {
    font-size: 11px;
    color: var(--text-secondary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 100%;
    text-align: center;
}
.instrument-btn.selected .name {
    color: var(--cyan-highlight);
    font-weight: 600;
}

/* 底部统计卡片 */
.sidebar-footer {
    flex-shrink: 0;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 6px;
    padding: 8px 10px 10px;
    border-top: 1px solid var(--border-neutral-l1);
}
.stat-card {
    background: var(--bg-overlay-l1);
    border: 1px solid var(--border-neutral-l1);
    border-radius: var(--radius-4);
    padding: 6px 8px;
    text-align: center;
}
.stat-val {
    font-family: var(--code-editor-font-family);
    font-size: 15px;
    font-weight: 600;
    color: var(--text-default);
    line-height: 1.2;
}
.stat-label {
    font-size: 10px;
    color: var(--text-tertiary);
    margin-top: 2px;
}

/* ==========================================================
 *  中央画布区 .canvas-area
 * ========================================================== */
.canvas-area {
    grid-area: canvas;
    position: relative;
    background: var(--bg-base-default);
    background-image:
        linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
    background-size: 24px 24px;
    overflow: hidden;
}

/* 属性面板可见时，画布右侧留出空间 */
#app:has(#property-panel.visible) .canvas-area {
    /* canvas 占 grid 第3列，自动被 grid 挤压 */
}

/* 四角装饰信息 */
.canvas-deco {
    position: absolute;
    font-family: var(--code-editor-font-family);
    font-size: 10px;
    color: var(--text-tertiary);
    display: flex;
    align-items: center;
    gap: 4px;
    z-index: 4;
    pointer-events: none;
    padding: 4px 8px;
    background: rgba(0,0,0,0.2);
    border-radius: var(--radius-4);
    backdrop-filter: blur(4px);
}
.canvas-deco .deco-label {
    color: var(--text-tertiary);
    text-transform: uppercase;
    font-size: 9px;
    letter-spacing: 0.5px;
}
.canvas-deco .deco-val {
    color: var(--text-secondary);
    font-weight: 500;
}
.canvas-deco .deco-sep {
    color: var(--border-neutral-l2);
}
.deco-tl { top: 10px; left: 10px; }
.deco-tr { top: 10px; right: 10px; }
.deco-bl { bottom: 10px; left: 10px; color: var(--bg-brand); }
.deco-bl svg { color: var(--bg-brand); }
.deco-br { bottom: 10px; right: 10px; }

/* ==========================================================
 *  属性面板 #property-panel (280px)
 * ========================================================== */
#property-panel {
    grid-area: props;
    background: var(--bg-base-default);
    border-left: 1px solid var(--border-neutral-l1);
    border-radius: 0;
    border-top: none;
    border-right: none;
    border-bottom: none;
    box-shadow: none;
    z-index: 9;
    display: none;
    flex-direction: column;
    overflow: hidden;
}
#property-panel.visible {
    display: flex;
    animation: none;
}

/* Inspector 头部 */
.inspector-header {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 14px;
    border-bottom: 1px solid var(--border-neutral-l1);
    flex-shrink: 0;
    min-height: 42px;
}
.inspector-icon {
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-4);
    background: var(--bg-overlay-l1);
    border: 1px solid var(--border-neutral-l1);
    flex-shrink: 0;
    font-size: 14px;
}
.inspector-title-group {
    flex: 1;
    min-width: 0;
}
.inspector-title {
    font-size: 13px;
    font-weight: 600;
    line-height: 1.2;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    color: var(--text-default);
}
.inspector-subtitle {
    font-size: 10px;
    color: var(--text-tertiary);
    margin-top: 2px;
    font-family: var(--code-editor-font-family);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}
.inspector-close {
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: none;
    color: var(--text-tertiary);
    cursor: pointer;
    border-radius: var(--radius-4);
    transition: all 0.15s;
    flex-shrink: 0;
}
.inspector-close:hover {
    background: var(--bg-overlay-l1);
    color: var(--text-default);
}

/* Inspector 主体 */
.inspector-body {
    flex: 1;
    overflow-y: auto;
    scrollbar-width: thin;
}

/* Inspector 可折叠分区 */
.inspector-section {
    border-bottom: 1px solid var(--border-neutral-l1);
}
.inspector-section:last-child {
    border-bottom: none;
}
.inspector-section-header {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 9px 14px 7px;
    cursor: pointer;
    user-select: none;
    transition: background 0.15s;
}
.inspector-section-header:hover {
    background: var(--bg-overlay-l1);
}
.inspector-section-header .chevron {
    width: 10px;
    height: 10px;
    transition: transform 0.2s;
    opacity: 0.5;
    flex-shrink: 0;
}
.inspector-section.collapsed .chevron {
    transform: rotate(-90deg);
}
.inspector-section-header .section-label {
    font-size: 10px;
    font-weight: 600;
    letter-spacing: 0.8px;
    text-transform: uppercase;
    color: var(--text-tertiary);
}
.inspector-section-content {
    padding: 0 14px 10px;
}
.inspector-section.collapsed .inspector-section-content {
    display: none;
}

/* Inspector 属性行 */
.insp-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    min-height: 26px;
    padding: 3px 0;
}
.insp-row .insp-label {
    font-size: 12px;
    color: var(--text-secondary);
    white-space: nowrap;
    flex-shrink: 0;
}
.insp-row .insp-value {
    font-family: var(--code-editor-font-family);
    font-size: 12px;
    font-weight: 600;
    color: var(--cyan-highlight);
    text-align: right;
}
.insp-row .insp-value.purple { color: var(--purple-accent); }
.insp-row .insp-value.green  { color: var(--success); }
.insp-row .insp-value.orange { color: var(--warning); }
.insp-row .insp-value.gray   { color: var(--text-tertiary); }

/* Inspector 滑块行 */
.insp-slider {
    padding: 4px 0 4px;
}
.insp-slider .insp-slider-head {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 4px;
}
.insp-slider .insp-slider-label {
    font-size: 12px;
    color: var(--text-secondary);
}
.insp-slider .insp-slider-value {
    font-family: var(--code-editor-font-family);
    font-size: 12px;
    font-weight: 600;
    color: var(--cyan-highlight);
}
.insp-slider.purple .insp-slider-value { color: var(--purple-accent); }
.insp-slider.green  .insp-slider-value { color: var(--success); }
.insp-slider.orange .insp-slider-value { color: var(--warning); }
.insp-slider.gray   .insp-slider-value { color: var(--text-tertiary); }

.insp-slider input[type="range"] {
    width: 100%;
    height: 3px;
    background: var(--slider-track);
    border-radius: 2px;
    outline: none;
    -webkit-appearance: none;
    appearance: none;
    cursor: pointer;
}
.insp-slider input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 12px;
    height: 12px;
    background: var(--cyan-highlight);
    border-radius: 50%;
    border: 2px solid var(--bg-base-secondary);
    cursor: pointer;
    box-shadow: 0 0 4px rgba(50,240,140,0.4);
}
.insp-slider.purple input[type="range"]::-webkit-slider-thumb {
    background: var(--purple-accent);
    box-shadow: 0 0 4px rgba(167,139,250,0.4);
}
.insp-slider.green input[type="range"]::-webkit-slider-thumb {
    background: var(--success);
    box-shadow: 0 0 4px rgba(50,240,140,0.4);
}
.insp-slider.orange input[type="range"]::-webkit-slider-thumb {
    background: var(--warning);
    box-shadow: 0 0 4px rgba(251,191,36,0.4);
}
.insp-slider.gray input[type="range"]::-webkit-slider-thumb {
    background: var(--text-tertiary);
    box-shadow: none;
}
.insp-slider input[type="range"]::-moz-range-thumb {
    width: 12px;
    height: 12px;
    background: var(--cyan-highlight);
    border-radius: 50%;
    border: 2px solid var(--bg-base-secondary);
    cursor: pointer;
}

/* Inspector 位置输入 */
.insp-position {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 6px;
}
.insp-axis {
    background: var(--bg-overlay-l1);
    border: 1px solid var(--border-neutral-l1);
    border-radius: var(--radius-4);
    padding: 5px 4px;
    text-align: center;
    cursor: ns-resize;
    transition: all 0.15s;
}
.insp-axis:hover {
    background: var(--status-primary-surface-l1);
    border-color: rgba(50,240,140,0.25);
}
.insp-axis .axis-label {
    font-size: 9px;
    font-weight: 700;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}
.insp-axis .axis-val {
    font-size: 11px;
    color: var(--text-default);
    font-family: var(--code-editor-font-family);
    font-weight: 600;
    margin-top: 1px;
}

/* Inspector 删除按钮 */
.insp-delete {
    width: 100%;
    height: 30px;
    margin-top: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    background: rgba(248,113,113,0.08);
    border: 1px solid rgba(248,113,113,0.2);
    border-radius: var(--radius-4);
    color: var(--danger);
    font-size: 12px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.15s;
    font-family: inherit;
}
.insp-delete:hover {
    background: rgba(248,113,113,0.16);
    border-color: rgba(248,113,113,0.35);
}
.insp-delete svg {
    width: 13px;
    height: 13px;
}

/* Inspector 传感器读数 */
.insp-readout {
    border-radius: var(--radius-6);
    padding: 8px 10px;
    background: var(--readout-bg);
    border: 1px solid var(--readout-border);
}
.insp-readout.hit {
    background: var(--status-primary-surface-l1);
    border-color: rgba(50,240,140,0.25);
}
.insp-readout .ro-status {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 12px;
    font-weight: 600;
    color: var(--success);
}
.insp-readout .ro-status.idle {
    color: var(--text-tertiary);
    font-weight: 500;
}
.insp-readout .ro-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--success);
    box-shadow: 0 0 5px var(--success);
    animation: pulse 1.5s ease-in-out infinite;
}
.insp-readout .ro-dot.idle {
    background: rgba(255,255,255,0.2);
    box-shadow: none;
    animation: none;
}
.insp-readout .ro-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 11px;
    margin-top: 4px;
}
.insp-readout .ro-row .ro-name {
    color: var(--text-secondary);
}
.insp-readout .ro-row .ro-val {
    font-family: var(--code-editor-font-family);
    font-weight: 600;
    color: var(--success);
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.4; }
}

/* 传感器强度分布图 */
.insp-intensity-map {
    margin-top: 10px;
    padding: 10px;
    background: var(--readout-bg);
    border: 1px solid var(--readout-border);
    border-radius: var(--radius-6);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
}
.insp-intensity-label {
    font-size: 11px;
    font-weight: 600;
    color: var(--text-secondary);
    align-self: flex-start;
    letter-spacing: 0.5px;
}
.intensity-canvas {
    width: 128px;
    height: 128px;
    border: 1px solid var(--border-neutral-l1);
    border-radius: var(--radius-4);
    background: #000;
    image-rendering: pixelated;
}
.insp-intensity-scale {
    display: flex;
    align-items: center;
    gap: 8px;
    width: 100%;
    font-size: 10px;
    color: var(--text-tertiary);
}
.insp-intensity-scale .intensity-bar {
    flex: 1;
    height: 6px;
    border-radius: 3px;
    background: linear-gradient(to right,
        hsl(240, 70%, 50%),
        hsl(140, 70%, 50%),
        hsl(0, 70%, 50%));
}

/* ==========================================================
 *  提示横幅 #hint-banner
 * ========================================================== */
#hint-banner {
    position: absolute;
    top: 16px;
    left: 50%;
    transform: translateX(-50%);
    padding: 7px 12px 7px 14px;
    background: var(--bg-base-secondary);
    border: 1px solid var(--border-neutral-l2);
    border-radius: var(--radius-6);
    color: var(--text-default);
    font-size: 12px;
    font-weight: 500;
    z-index: 8;
    display: none;
    align-items: center;
    gap: 10px;
    box-shadow: 0 4px 16px rgba(0,0,0,0.3);
    animation: fadeIn 0.2s ease;
    max-width: calc(100% - 40px);
    pointer-events: auto;
}
#hint-banner.visible {
    display: inline-flex;
}
@keyframes fadeIn {
    from { opacity: 0; transform: translateX(-50%) translateY(-4px); }
    to   { opacity: 1; transform: translateX(-50%) translateY(0); }
}
#hint-banner .text {
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
#hint-banner .dismiss {
    background: none;
    border: none;
    color: var(--text-tertiary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 18px;
    height: 18px;
    border-radius: var(--radius-4);
    flex-shrink: 0;
    padding: 0;
    transition: all 0.15s;
}
#hint-banner .dismiss:hover {
    background: var(--bg-overlay-l1);
    color: var(--text-default);
}

/* ==========================================================
 *  元件信息气泡 .bubble
 * ========================================================== */
.bubble {
    position: absolute;
    pointer-events: none;
    padding: 4px 8px;
    background: var(--bg-base-secondary);
    border: 1px solid var(--border-neutral-l2);
    border-radius: var(--radius-4);
    color: var(--text-default);
    font-size: 11px;
    font-weight: 500;
    transform: translate(-50%, -120%);
    white-space: nowrap;
    z-index: 5;
    box-shadow: 0 4px 12px rgba(0,0,0,0.3);
}

/* ==========================================================
 *  状态栏 .statusbar (24px)
 * ========================================================== */
.statusbar {
    grid-area: statusbar;
    height: 24px;
    background: var(--bg-base-secondary);
    border-top: 1px solid var(--border-neutral-l1);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 10px;
    font-size: 11px;
    color: var(--text-tertiary);
    font-family: var(--code-editor-font-family);
    z-index: 10;
}
.sb-left, .sb-right {
    display: flex;
    align-items: center;
    gap: 0;
}
.sb-item {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 0 8px;
    height: 24px;
    white-space: nowrap;
    cursor: default;
    transition: background 0.15s;
}
.sb-item:hover {
    background: var(--bg-overlay-l1);
    color: var(--text-secondary);
}
.sb-item.sb-primary {
    color: var(--bg-brand);
}
.sb-item.sb-primary:hover {
    background: var(--status-primary-surface-l1);
}

/* ==========================================================
 *  响应式适配
 * ========================================================== */
@media (max-width: 900px) {
    #app {
        grid-template-columns: 40px 200px 1fr;
    }
    #app:has(#property-panel.visible) {
        grid-template-columns: 40px 200px 1fr 240px;
    }
    .activity-rail { padding: 6px 0; }
    .rail-item { width: 30px; height: 30px; }
    .rail-item svg { width: 18px; height: 18px; }
    .instrument-btn .name { font-size: 10px; }
}

@media (max-width: 640px) {
    #app {
        grid-template-columns: 0px 180px 1fr;
    }
    #app:has(#property-panel.visible) {
        grid-template-columns: 0px 180px 1fr 0px;
    }
    .activity-rail { display: none; }
    #property-panel {
        position: absolute;
        right: 0;
        top: 40px;
        bottom: 24px;
        width: 240px;
        z-index: 12;
    }
    .mode-chip span, .project-selector span { display: none; }
    .project-selector { padding: 0 6px; }
    .canvas-deco { font-size: 9px; padding: 3px 6px; }
}

/* ==========================================================
 *  UI 交互面板样式 (ui-interactions.js)
 * ========================================================== */

/* Overlay panels */
.overlay-panel { position: fixed; inset: 0; z-index: 100; display: none; }
.overlay-panel.visible { display: block; }
.palette-backdrop { position: absolute; inset: 0; background: rgba(0,0,0,0.5); }
.palette-box { position: absolute; top: 15%; left: 50%; transform: translateX(-50%); width: 560px; max-height: 420px; background: var(--bg-base-secondary, #222427); border: 1px solid var(--border-neutral-l1, rgba(224,226,242,0.1)); border-radius: 8px; box-shadow: 0 20px 60px rgba(0,0,0,0.5); display: flex; flex-direction: column; overflow: hidden; }
.palette-input-wrap { display: flex; align-items: center; gap: 10px; padding: 12px 14px; border-bottom: 1px solid var(--border-neutral-l1, rgba(224,226,242,0.1)); color: var(--text-tertiary, #6B7280); }
.palette-input-wrap input { flex: 1; background: none; border: none; outline: none; color: var(--text-default, #E5E7EB); font-size: 14px; }
.palette-input-wrap kbd { background: var(--bg-overlay-l2, rgba(255,255,255,0.08)); padding: 2px 6px; border-radius: 4px; font-size: 11px; font-family: var(--code-editor-font-family, monospace); color: var(--text-secondary, #9CA3AF); }
.palette-list { flex: 1; overflow-y: auto; padding: 6px; }
.palette-item { display: flex; align-items: center; gap: 10px; padding: 8px 10px; border-radius: 4px; cursor: pointer; font-size: 13px; color: var(--text-secondary, #9CA3AF); }
.palette-item:hover, .palette-item.selected { background: var(--bg-overlay-l1, rgba(255,255,255,0.06)); color: var(--text-default, #E5E7EB); }
.palette-item .pi-icon { width: 20px; height: 20px; display: flex; align-items: center; justify-content: center; color: var(--text-tertiary, #6B7280); }
.palette-item .pi-label { flex: 1; }
.palette-item .pi-shortcut { font-size: 11px; font-family: var(--code-editor-font-family, monospace); color: var(--text-tertiary, #6B7280); }
.palette-hint { display: flex; justify-content: space-between; padding: 8px 14px; border-top: 1px solid var(--border-neutral-l1, rgba(224,226,242,0.1)); font-size: 11px; color: var(--text-tertiary, #6B7280); }
.palette-hint span { display: flex; align-items: center; gap: 4px; }
kbd { background: var(--bg-overlay-l2, rgba(255,255,255,0.08)); padding: 2px 6px; border-radius: 3px; font-size: 11px; font-family: var(--code-editor-font-family, monospace); color: var(--text-secondary, #9CA3AF); }

/* Dropdown menu */
.dropdown-menu { position: absolute; top: 44px; left: 52px; width: 220px; background: var(--bg-base-secondary, #222427); border: 1px solid var(--border-neutral-l1, rgba(224,226,242,0.1)); border-radius: 6px; box-shadow: 0 8px 30px rgba(0,0,0,0.4); z-index: 50; display: none; padding: 4px; }
.dropdown-menu.visible { display: block; }
.dm-header { padding: 6px 10px; font-size: 10px; font-weight: 600; text-transform: uppercase; letter-spacing: 0.06em; color: var(--text-tertiary, #6B7280); }
.dm-item { display: flex; align-items: center; gap: 8px; padding: 7px 10px; border-radius: 4px; cursor: pointer; font-size: 13px; color: var(--text-secondary, #9CA3AF); }
.dm-item:hover { background: var(--bg-overlay-l1, rgba(255,255,255,0.06)); color: var(--text-default, #E5E7EB); }
.dm-item.active { color: var(--text-default, #E5E7EB); }
.dm-item .dm-check { margin-left: auto; color: var(--bg-brand, #32F08C); }
.dm-divider { height: 1px; background: var(--border-neutral-l1, rgba(224,226,242,0.1)); margin: 4px 0; }

/* Settings panel */
.settings-box { position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%); width: 520px; max-height: 520px; background: var(--bg-base-secondary, #222427); border: 1px solid var(--border-neutral-l1, rgba(224,226,242,0.1)); border-radius: 8px; box-shadow: 0 20px 60px rgba(0,0,0,0.5); display: flex; flex-direction: column; overflow: hidden; }
.help-box { position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%); width: 480px; max-height: 480px; background: var(--bg-base-secondary, #222427); border: 1px solid var(--border-neutral-l1, rgba(224,226,242,0.1)); border-radius: 8px; box-shadow: 0 20px 60px rgba(0,0,0,0.5); display: flex; flex-direction: column; overflow: hidden; }
.settings-header { display: flex; align-items: center; justify-content: space-between; padding: 14px 16px; border-bottom: 1px solid var(--border-neutral-l1, rgba(224,226,242,0.1)); }
.settings-header h3 { margin: 0; font-size: 14px; font-weight: 600; color: var(--text-default, #E5E7EB); }
.settings-close { width: 28px; height: 28px; display: flex; align-items: center; justify-content: center; background: none; border: none; border-radius: 4px; color: var(--text-tertiary, #6B7280); cursor: pointer; }
.settings-close:hover { background: var(--bg-overlay-l1, rgba(255,255,255,0.06)); color: var(--text-default, #E5E7EB); }
.settings-body, .help-body { flex: 1; overflow-y: auto; padding: 16px; }
.settings-group { margin-bottom: 20px; }
.settings-group-title { font-size: 10px; font-weight: 600; text-transform: uppercase; letter-spacing: 0.06em; color: var(--text-tertiary, #6B7280); margin-bottom: 10px; }
.settings-row { display: flex; align-items: center; justify-content: space-between; min-height: 30px; font-size: 13px; color: var(--text-secondary, #9CA3AF); }
.settings-info { background: var(--bg-overlay-l1, rgba(255,255,255,0.06)); border-radius: 6px; padding: 10px; }
.info-row { display: flex; justify-content: space-between; padding: 4px 0; font-size: 12px; color: var(--text-secondary, #9CA3AF); }
.info-row span:last-child { font-family: var(--code-editor-font-family, monospace); color: var(--text-default, #E5E7EB); }

/* Toggle switch */
.toggle-switch { position: relative; width: 36px; height: 20px; display: inline-block; cursor: pointer; }
.toggle-switch input { display: none; }
.toggle-slider { position: absolute; inset: 0; background: var(--bg-overlay-l2, rgba(255,255,255,0.08)); border-radius: 10px; transition: 0.2s; }
.toggle-slider::after { content: ''; position: absolute; width: 16px; height: 16px; background: #fff; border-radius: 50%; top: 2px; left: 2px; transition: 0.2s; }
.toggle-switch input:checked + .toggle-slider { background: var(--bg-brand, #32F08C); }
.toggle-switch input:checked + .toggle-slider::after { transform: translateX(16px); }

/* Segmented control */
.segmented-control { display: inline-flex; background: var(--bg-overlay-l1, rgba(255,255,255,0.06)); border-radius: 6px; padding: 2px; }
.seg-btn { padding: 4px 12px; border: none; background: transparent; color: var(--text-secondary, #9CA3AF); border-radius: 4px; cursor: pointer; font-size: 12px; transition: 0.15s; }
.seg-btn.active { background: var(--bg-overlay-l2, rgba(255,255,255,0.08)); color: var(--text-default, #E5E7EB); }
.settings-select { background: var(--bg-overlay-l1, rgba(255,255,255,0.06)); border: 1px solid var(--border-neutral-l1, rgba(224,226,242,0.1)); color: var(--text-default, #E5E7EB); padding: 4px 8px; border-radius: 4px; font-size: 12px; outline: none; }
.settings-range { width: 120px; accent-color: var(--bg-brand, #32F08C); }

/* Data view */
.sidebar-data-view { display: flex; flex-direction: column; flex: 1; padding: 8px; overflow-y: auto; }
.data-chart-card { background: var(--bg-overlay-l1, rgba(255,255,255,0.06)); border-radius: 6px; padding: 10px; margin-bottom: 8px; }
.data-chart-title { font-size: 10px; font-weight: 600; color: var(--text-tertiary, #6B7280); margin-bottom: 8px; text-transform: uppercase; letter-spacing: 0.06em; }
#intensity-chart { width: 100%; height: 100px; display: block; }
.data-stats { display: grid; grid-template-columns: 1fr 1fr; gap: 6px; margin-bottom: 8px; }
.data-stat { background: var(--bg-overlay-l1, rgba(255,255,255,0.06)); border-radius: 6px; padding: 8px; }
.ds-label { font-size: 10px; color: var(--text-tertiary, #6B7280); }
.ds-value { font-family: var(--code-editor-font-family, monospace); font-size: 16px; font-weight: 600; color: var(--bg-brand, #32F08C); }
.ds-value.green { color: var(--success, #32F08C); }
.data-log { background: var(--bg-overlay-l1, rgba(255,255,255,0.06)); border-radius: 6px; padding: 10px; flex: 1; display: flex; flex-direction: column; min-height: 0; }
.data-log-title { font-size: 10px; font-weight: 600; color: var(--text-tertiary, #6B7280); margin-bottom: 6px; text-transform: uppercase; letter-spacing: 0.06em; }
.log-list { flex: 1; overflow-y: auto; font-size: 11px; font-family: var(--code-editor-font-family, monospace); }
.log-item { display: flex; gap: 8px; padding: 2px 0; color: var(--text-secondary, #9CA3AF); }
.log-time { color: var(--text-tertiary, #6B7280); flex-shrink: 0; }

/* Extensions */
.ext-card { display: flex; align-items: center; gap: 10px; padding: 10px; background: var(--bg-overlay-l1, rgba(255,255,255,0.06)); border-radius: 6px; margin-bottom: 6px; }
.ext-icon { width: 32px; height: 32px; display: flex; align-items: center; justify-content: center; background: var(--bg-overlay-l2, rgba(255,255,255,0.08)); border-radius: 6px; color: var(--text-secondary, #9CA3AF); flex-shrink: 0; }
.ext-info { flex: 1; min-width: 0; }
.ext-name { font-size: 12px; font-weight: 500; color: var(--text-default, #E5E7EB); }
.ext-desc { font-size: 10px; color: var(--text-tertiary, #6B7280); margin-top: 2px; }
.ext-badge { font-size: 10px; color: var(--bg-brand, #32F08C); background: rgba(50,240,140,0.1); padding: 2px 6px; border-radius: 4px; }
.ext-install { font-size: 11px; padding: 4px 10px; background: var(--bg-brand, #32F08C); color: #000; border: none; border-radius: 4px; cursor: pointer; font-weight: 600; }

/* Help */
.help-section { margin-bottom: 16px; }
.help-section-title { font-size: 10px; font-weight: 600; text-transform: uppercase; letter-spacing: 0.06em; color: var(--text-tertiary, #6B7280); margin-bottom: 8px; }
.shortcut-row { display: flex; align-items: center; gap: 6px; padding: 4px 0; font-size: 12px; color: var(--text-secondary, #9CA3AF); }
.shortcut-row span:last-child { margin-left: auto; }
.help-tip { display: flex; gap: 8px; align-items: flex-start; padding: 10px; background: rgba(50,240,140,0.08); border: 1px solid rgba(50,240,140,0.2); border-radius: 6px; font-size: 12px; color: var(--bg-brand, #32F08C); }

/* Toast */
.toast-notification { position: fixed; top: 56px; left: 50%; transform: translateX(-50%); background: var(--bg-base-secondary, #222427); border: 1px solid var(--border-neutral-l1, rgba(224,226,242,0.1)); padding: 8px 18px; border-radius: 6px; font-size: 13px; color: var(--text-default, #E5E7EB); z-index: 200; box-shadow: 0 8px 30px rgba(0,0,0,0.4); animation: toastIn 0.2s ease; }
@keyframes toastIn { from { opacity: 0; transform: translateX(-50%) translateY(-8px); } to { opacity: 1; transform: translateX(-50%) translateY(0); } }

/* Layout modes */
#app.focus-mode #instrument-bar { display: none; }
#app.focus-mode { grid-template-columns: 48px 1fr; grid-template-areas: "titlebar titlebar" "rail canvas" "statusbar statusbar"; }
#app.focus-mode:has(#property-panel.visible) { grid-template-columns: 48px 1fr 280px; grid-template-areas: "titlebar titlebar titlebar" "rail canvas props" "statusbar statusbar statusbar"; }
#app.focus-mode .activity-rail { border-right: none; }
#app.zen-mode #titlebar, #app.zen-mode .activity-rail, #app.zen-mode #instrument-bar, #app.zen-mode #property-panel, #app.zen-mode .statusbar { display: none !important; }
#app.zen-mode { grid-template-columns: 1fr; grid-template-rows: 1fr; grid-template-areas: "canvas"; }
.tl-dot.tl-btn { cursor: pointer; transition: transform 0.1s; }
.tl-dot.tl-btn:hover { transform: scale(1.2); }
.tl-dot.tl-btn:active { transform: scale(0.9); }

/* Fullscreen mode */
#app.fullscreen { position: fixed; inset: 0; width: 100vw; height: 100vh; z-index: 999; }