:root {
  /* 专业 IoT Dashboard 配色方案 */
  --bg-base: #0f172a;
  --bg-elevated: #1e293b;
  --bg-panel: #334155;
  --bg-input: #1e293b;

  /* 语义化颜色 */
  --primary: #3b82f6;
  --primary-hover: #2563eb;
  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;
  --info: #06b6d4;

  /* 文本颜色 */
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;

  /* 边框和分隔线 */
  --border: #475569;
  --border-light: #64748b;

  /* 阴影效果 */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);

  /* 专业蓝色调 */
  --accent-blue: #3b82f6;
  --accent-cyan: #06b6d4;
  --accent-teal: #14b8a6;

  /* CCTV 风格的深色背景 */
  --cctv-bg: #0f172a;
  --cctv-panel: #1e293b;
  --cctv-border: #334155;

  /* 状态指示灯颜色 */
  --status-ok: #10b981;
  --status-warn: #f59e0b;
  --status-error: #ef4444;
  --status-info: #3b82f6;
}

* {
  box-sizing: border-box;
}

html,
body {
  height: 100%;
}

body {
  margin: 0;
  min-height: 100%;
  overflow: hidden;
  color: var(--text-primary);
  font-family: "SF Pro Display", "Inter", "IBM Plex Sans", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background: var(--cctv-bg);
}

.app-shell {
  display: grid;
  grid-template-rows: auto 1fr;
  height: 100vh;
  min-height: 100vh;
  overflow: hidden;
}

/* 顶部导航栏 - 专业工具风格 */
.app-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  padding: 0.75rem 1.25rem;
  border-bottom: 1px solid var(--cctv-border);
  background: linear-gradient(180deg, var(--cctv-panel), var(--bg-elevated));
  box-shadow: var(--shadow-md);
}

.brand-block h1 {
  margin: 0;
  font-size: 1.1rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--text-primary);
}

.brand-block h1::before {
  content: "🎯";
  font-size: 1.2rem;
}

.brand-block h1 span {
  font-size: 0.75rem;
  color: var(--text-secondary);
  font-weight: 500;
  padding: 0.25rem 0.5rem;
  background: rgba(59, 130, 246, 0.1);
  border-radius: 0.375rem;
  border: 1px solid rgba(59, 130, 246, 0.2);
}

.header-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 0.5rem;
}

/* 现代化按钮样式 */
.header-actions button,
.header-actions .file-btn {
  padding: 0.5rem 0.75rem;
  font-size: 0.8rem;
  border-radius: 0.5rem;
  font-weight: 500;
  transition: all 0.2s ease;
}

.header-actions button:hover,
.header-actions .file-btn:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

#clearCacheBtn {
  background: rgba(239, 68, 68, 0.1);
  border-color: var(--status-error);
  color: var(--status-error);
}

#clearCacheBtn:hover {
  background: rgba(239, 68, 68, 0.2);
}

/* 主内容区域 */
.content-grid {
  display: grid;
  grid-template-columns: minmax(340px, 380px) 1fr;
  gap: 0.75rem;
  padding: 0.75rem;
  height: 100%;
  min-height: 0;
  overflow: hidden;
}

.content-grid.panel-collapsed {
  grid-template-columns: 64px 1fr;
}

/* 左侧控制面板 - 专业面板风格 */
.panel {
  overflow: auto;
  min-height: 0;
  border: 1px solid var(--cctv-border);
  border-radius: 0.75rem;
  background: var(--cctv-panel);
  box-shadow: var(--shadow-lg);
  padding: 0.75rem;
}

.panel-collapsed-tools {
  display: none;
  flex-direction: column;
  gap: 0.5rem;
}

.panel-collapsed-tools button {
  width: 100%;
  min-width: 0;
  padding: 0.5rem 0.25rem;
  font-weight: 700;
  border-radius: 0.5rem;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  color: var(--text-primary);
  transition: all 0.2s ease;
}

.panel-collapsed-tools button:hover {
  background: var(--bg-panel);
  border-color: var(--border-light);
}

.content-grid.panel-collapsed .panel {
  padding: 0.5rem;
}

.content-grid.panel-collapsed .panel section {
  display: none;
}

.content-grid.panel-collapsed .panel-collapsed-tools {
  display: flex;
}

/* 分区样式 - Blueprint UI 风格 */
.panel section {
  border: 1px solid var(--border);
  border-radius: 0.625rem;
  padding: 0;
  background: rgba(30, 41, 59, 0.5);
  margin-bottom: 0.75rem;
  overflow: hidden;
}

.section-toggle {
  width: 100%;
  border: 0;
  border-radius: 0.625rem;
  padding: 0.75rem 1rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-primary);
  background: linear-gradient(180deg, rgba(51, 65, 85, 0.8), rgba(30, 41, 59, 0.6));
  box-shadow: inset 0 -1px 0 rgba(0, 0, 0, 0.2);
  cursor: pointer;
  transition: all 0.2s ease;
}

.section-toggle:hover {
  background: linear-gradient(180deg, rgba(59, 130, 246, 0.2), rgba(30, 41, 59, 0.8));
}

.section-toggle .chevron {
  font-size: 0.8rem;
  color: var(--text-secondary);
  transition: transform 180ms ease;
}

.panel section.open .section-toggle {
  background: linear-gradient(180deg, rgba(59, 130, 246, 0.3), rgba(37, 99, 235, 0.2));
  box-shadow: inset 0 -1px 0 rgba(59, 130, 246, 0.3);
  border-bottom: 1px solid rgba(59, 130, 246, 0.3);
}

.panel section.open .section-toggle .chevron {
  transform: rotate(180deg);
  color: var(--accent-blue);
}

.section-body {
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  padding: 0 1rem;
  transition: max-height 210ms ease, opacity 170ms ease, padding 170ms ease;
}

.panel section.open .section-body {
  max-height: 1200px;
  opacity: 1;
  padding: 0.75rem 1rem 1rem;
}

.field-row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin-bottom: 0.5rem;
}

label {
  font-size: 0.85rem;
  color: var(--text-secondary);
  font-weight: 500;
}

/* 现代化输入框和按钮 */
input[type="number"],
input[type="text"],
select,
button,
.file-btn {
  border: 1px solid var(--border);
  border-radius: 0.5rem;
  padding: 0.5rem 0.75rem;
  background: var(--bg-input);
  color: var(--text-primary);
  font: inherit;
  font-size: 0.85rem;
  transition: all 0.2s ease;
}

input[type="number"]:focus,
input[type="text"]:focus,
select:focus {
  outline: none;
  border-color: var(--accent-blue);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

button,
.file-btn {
  cursor: pointer;
  background: linear-gradient(180deg, var(--bg-panel), var(--bg-elevated));
  font-weight: 500;
  border-color: var(--border);
}

button:hover,
.file-btn:hover {
  background: linear-gradient(180deg, var(--bg-elevated), var(--bg-panel));
  border-color: var(--border-light);
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}

button:active,
.file-btn:active {
  transform: translateY(0);
}

button:disabled,
select:disabled {
  cursor: not-allowed;
  opacity: 0.5;
  box-shadow: none;
}

/* 主要操作按钮突出显示 */
#placeCameraBtn,
#detectObstaclesBtn,
#recommendSingleBtn,
#recommendMultiBtn {
  background: linear-gradient(180deg, var(--accent-blue), var(--primary-hover));
  border-color: var(--accent-blue);
  color: white;
  font-weight: 600;
}

#placeCameraBtn:hover,
#detectObstaclesBtn:hover,
#recommendSingleBtn:hover,
#recommendMultiBtn:hover {
  background: linear-gradient(180deg, var(--primary-hover), var(--accent-blue));
  box-shadow: 0 4px 12px rgba(59, 130, 246, 0.4);
}

input[type="range"] {
  width: 140px;
  accent-color: var(--accent-blue);
}

.file-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.subtle {
  color: var(--text-muted);
  font-size: 0.8rem;
}

.inline-link {
  text-decoration: underline;
  text-decoration-style: dotted;
  color: var(--accent-cyan);
}

.inline-link:hover {
  color: var(--accent-blue);
}

/* 画布区域 - 专业编辑器风格 */
.canvas-wrap {
  display: grid;
  grid-template-rows: auto 1fr;
  min-height: 0;
  border-radius: 0.75rem;
  border: 1px solid var(--cctv-border);
  overflow: hidden;
  background: var(--bg-elevated);
  box-shadow: var(--shadow-xl);
}

.canvas-toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: nowrap;
  gap: 0.3rem;
  padding: 0.25rem 0.4rem;
  border-bottom: 1px solid var(--cctv-border);
  color: var(--text-secondary);
  font-size: 0.72rem;
  background: linear-gradient(90deg, rgba(59, 130, 246, 0.1), rgba(6, 182, 212, 0.1));
  overflow-x: auto;
}

.toolbar-group {
  display: inline-flex;
  align-items: center;
  flex-wrap: nowrap;
  gap: 0.3rem;
}

.toolbar-advanced {
  border-left: 1px solid var(--border);
  padding-left: 0.5rem;
}

.toolbar-group label {
  font-size: 0.8rem;
  color: var(--text-secondary);
}

/* 状态文本优化 - 防止换行并提供省略号 */
#modeLabel {
  max-width: 120px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  cursor: help;
}

#mousePos {
  min-width: 90px;
  max-width: 110px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

#statusText {
  max-width: 180px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  cursor: help;
}

.toolbar-group button {
  padding: 0.28rem 0.45rem;
  font-size: 0.7rem;
  min-width: fit-content;
}

#zoomLabel {
  min-width: 3.2rem;
  text-align: center;
  font-weight: 600;
  color: var(--accent-cyan);
  background: rgba(6, 182, 212, 0.1);
  padding: 0.25rem 0.5rem;
  border-radius: 0.375rem;
}

#modeLabel {
  color: var(--accent-blue);
  font-weight: 600;
}

#statusText {
  color: var(--text-muted);
}

/* 画布视口 - 专业编辑器背景 */
.canvas-viewport {
  overflow: auto;
  position: relative;
  min-height: 0;
  overscroll-behavior: contain;
  background:
    linear-gradient(45deg, #1e293b 25%, transparent 25%),
    linear-gradient(-45deg, #1e293b 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, #1e293b 75%),
    linear-gradient(-45deg, transparent 75%, #1e293b 75%);
  background-size: 20px 20px;
  background-position: 0 0, 0 10px, 10px -10px, -10px 0;
  background-color: #0f172a;
  padding: 1rem;
}

.canvas-viewport.pan-ready {
  cursor: grab;
}

.canvas-viewport.pan-ready * {
  cursor: inherit !important;
}

.canvas-viewport.pan-active {
  cursor: grabbing;
}

.canvas-viewport.pan-active * {
  cursor: inherit !important;
}

#mainCanvas {
  display: block;
  background: #ffffff;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-lg);
  image-rendering: auto;
  transform-origin: top left;
}

/* 文本编辑器 */
.canvas-inline-text-editor {
  position: absolute;
  z-index: 8;
  min-width: 88px;
  max-width: 340px;
  padding: 4px 10px;
  border: 2px solid var(--accent-cyan);
  border-radius: 0.5rem;
  background: rgba(15, 23, 42, 0.95);
  color: var(--accent-cyan);
  line-height: 1.2;
  box-shadow: var(--shadow-lg);
  outline: none;
}

.canvas-inline-text-editor:focus {
  box-shadow: 0 0 0 3px rgba(6, 182, 212, 0.3), var(--shadow-lg);
}

/* 列表和面板 */
.camera-list,
.candidate-list,
.metrics-panel {
  max-height: 180px;
  overflow: auto;
  border: 1px solid var(--border);
  border-radius: 0.5rem;
  padding: 0.5rem;
  background: rgba(15, 23, 42, 0.5);
  font-size: 0.8rem;
}

.camera-item,
.candidate-item {
  padding: 0.5rem;
  border-bottom: 1px dashed var(--border);
  color: var(--text-primary);
}

.camera-item:last-child,
.candidate-item:last-child {
  border-bottom: 0;
}

/* 状态标签 - 专业 IoT 仪表板风格 */
.tag {
  display: inline-block;
  padding: 0.25rem 0.5rem;
  border-radius: 0.375rem;
  font-size: 0.75rem;
  margin-left: 0.5rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.tag.ok {
  color: var(--status-ok);
  background: rgba(16, 185, 129, 0.15);
  border: 1px solid rgba(16, 185, 129, 0.3);
}

.tag.warn {
  color: var(--status-warn);
  background: rgba(245, 158, 11, 0.15);
  border: 1px solid rgba(245, 158, 11, 0.3);
}

.tag.bad {
  color: var(--status-error);
  background: rgba(239, 68, 68, 0.15);
  border: 1px solid rgba(239, 68, 68, 0.3);
}

.tag.info {
  color: var(--status-info);
  background: rgba(59, 130, 246, 0.15);
  border: 1px solid rgba(59, 130, 246, 0.3);
}

/* PDF 预览网格 */
.pdf-preview-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
  gap: 0.5rem;
  padding: 0.5rem;
  max-height: 200px;
  overflow: auto;
  border: 1px solid var(--border);
  border-radius: 0.5rem;
  background: rgba(15, 23, 42, 0.5);
}

.pdf-thumb {
  border: 1px solid var(--border);
  background: var(--bg-elevated);
  border-radius: 0.5rem;
  overflow: hidden;
  cursor: pointer;
  padding: 0;
  text-align: left;
  transition: all 0.2s ease;
}

.pdf-thumb:hover {
  transform: translateY(-2px);
  border-color: var(--accent-cyan);
  box-shadow: 0 8px 25px rgba(6, 182, 212, 0.3);
}

.pdf-thumb img {
  display: block;
  width: 100%;
  aspect-ratio: 0.72;
  object-fit: cover;
  background: var(--bg-base);
}

.pdf-thumb span {
  display: block;
  padding: 0.3rem 0.5rem 0.4rem;
  font-size: 0.75rem;
  color: var(--text-secondary);
  background: var(--bg-elevated);
}

.pdf-thumb.active {
  border-color: var(--accent-blue);
  box-shadow: 0 0 0 2px rgba(59, 130, 246, 0.5);
}

/* 输入控件特殊样式 */
#iconScaleInput {
  width: 100px;
}

#iconScaleValue {
  min-width: 3.4rem;
  text-align: center;
  color: var(--accent-cyan);
  font-weight: 600;
  background: rgba(6, 182, 212, 0.1);
  padding: 0.25rem 0.5rem;
  border-radius: 0.375rem;
}

#textColorInput {
  width: 30px;
  height: 28px;
  border-radius: 0.5rem;
  padding: 0.15rem;
}

#textSizeInput {
  width: 56px;
}

#textToolBtn.active {
  background: rgba(6, 182, 212, 0.2);
  border-color: var(--accent-cyan);
  box-shadow: inset 0 0 0 1px rgba(6, 182, 212, 0.5);
  color: var(--accent-cyan);
}

/* 响应式设计 */
@media (max-width: 1100px) {
  body {
    overflow: auto;
  }

  .app-shell {
    height: auto;
    overflow: visible;
  }

  .content-grid {
    grid-template-columns: 1fr;
    height: auto;
    overflow: visible;
  }

  .content-grid.panel-collapsed {
    grid-template-columns: 1fr;
  }

  .content-grid.panel-collapsed .panel section {
    display: block;
  }

  .content-grid.panel-collapsed .panel-collapsed-tools {
    display: none;
  }

  .panel {
    max-height: 46vh;
  }

  .canvas-wrap {
    min-height: 58vh;
  }
}

/* 滚动条样式 - 专业工具风格 */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: var(--bg-base);
}

::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--border-light);
}

/* 选择文本样式 */
::selection {
  background: rgba(59, 130, 246, 0.3);
  color: var(--text-primary);
}

/* 聚焦样式优化 */
button:focus-visible,
.file-btn:focus-visible,
input:focus-visible,
select:focus-visible {
  outline: 2px solid var(--accent-blue);
  outline-offset: 2px;
}