* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Segoe UI', 'Noto Sans TC', Arial, sans-serif;
  background-color: #f5f7fa;
  color: #2d3748;
  line-height: 1.6;
  padding: 20px;
  max-width: 1600px;
  margin: 0 auto;
}

#designPanel, #simPanel {
  float: left;
  width: 48%;
  min-width: 300px;
  background: #ffffff;
  border-radius: 8px;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
  padding: 25px;
  margin: 0 1% 24px 1%;
  transition: box-shadow 0.3s ease;
  animation: fadeIn 0.5s ease-out;
}

#designPanel:hover, #simPanel:hover {
  box-shadow: 0 10px 15px rgba(0, 0, 0, 0.1);
}

#spacetimeCanvas {
  border: 1px solid #e2e8f0;
  background: #fff;
  border-radius: 8px;
  margin-top: 16px;
  width: 100%;
  height: 450px;
  box-shadow: inset 0 1px 3px rgba(0, 0, 0, 0.05);
}

h2 {
  color: #2c3e50;
  font-size: 1.6em;
  margin-bottom: 20px;
  padding-bottom: 10px;
  border-bottom: 2px solid #3498db;
  position: relative;
}

h2::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 50px;
  height: 2px;
  background-color: #2ecc71;
}

h3 {
  color: #2c3e50;
  font-size: 1.3em;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
}

h3::before {
  content: '';
  display: inline-block;
  width: 6px;
  height: 18px;
  background-color: #3498db;
  margin-right: 8px;
  border-radius: 3px;
}

#settingsPanel {
  position: fixed;
  top: 100px;
  right: 20px;
  width: 300px;
  max-height: 70vh;
  border: 1px solid #e2e8f0;
  border-radius: 8px;
  background: #f8fafc;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
  z-index: 10;
  display: flex;
  flex-direction: column;
  transition: transform 0.5s ease, opacity 0.5s ease; /* 添加縮放和平移動畫 */
  transform-origin: bottom left; /* 動畫從左下角開始 */
}

#titleBar {
  background: #3498db;
  color: white;
  padding: 10px 15px;
  border-top-left-radius: 8px;
  border-top-right-radius: 8px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: move;
  user-select: none;
  flex-shrink: 0;
}

#titleBar span:first-child {
  font-size: 1.3em;
  font-weight: 600;
}

#minimizeBtn {
  width: 20px;
  height: 20px;
  cursor: pointer;
  background: #2980b9;
  border-radius: 50%;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}

#minimizeBtn::before {
  content: "";
  position: absolute;
  width: 12px;
  height: 2px;
  background: white;
  border-radius: 1px;
}

#minimizeBtn:hover {
  background: #1f6699;
}

#panelContent {
  padding: 20px;
  background: #f8fafc;
  overflow-y: auto;
  flex-grow: 1;
  border-bottom-left-radius: 8px;
  border-bottom-right-radius: 8px;
  min-height: 0;
}

#panelContent::-webkit-scrollbar {
  width: 8px;
}

#panelContent::-webkit-scrollbar-track {
  background: #e2e8f0;
  border-radius: 4px;
}

#panelContent::-webkit-scrollbar-thumb {
  background: #3498db;
  border-radius: 4px;
}

#panelContent::-webkit-scrollbar-thumb:hover {
  background: #2980b9;
}

#minimizedIcon {
  position: fixed;
  bottom: 20px;
  left: 20px;
  display: none;
  z-index: 10;
  opacity: 0; /* 初始透明 */
  transition: opacity 0.5s ease; /* 淡入效果 */
}

.icon-wrapper {
  display: flex;
  align-items: center;
  background: #f8fafc;
  border: 1px solid #e2e8f0;
  border-radius: 20px;
  padding: 5px 10px;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.1);
  cursor: pointer;
  transition: transform 0.2s ease;
}

.icon-wrapper:hover {
  transform: scale(1.05);
}

.icon-wrapper img {
  width: 24px;
  height: 24px;
  margin-right: 8px;
}

.icon-text {
  font-size: 14px;
  color: #333;
}

.icon-wrapper:hover::after {
  content: attr(data-tooltip);
  position: absolute;
  bottom: 100%;
  left: 50%;
  transform: translateX(-50%);
  background: #333;
  color: white;
  padding: 4px 8px;
  border-radius: 4px;
  font-size: 12px;
  white-space: nowrap;
  z-index: 20;
  opacity: 0.9;
}

@media (max-width: 768px) {
  #settingsPanel {
    position: absolute;
    top: auto;
    bottom: 20px;
    right: 20px;
    width: 90%;
    max-width: 300px;
  }
  #minimizedIcon {
    left: 10px;
  }
}

label {
  display: inline-block;
  padding-right: 8px;
  font-weight: 600;
  color: #4a5568;
}

input, select {
  padding: 8px 12px;
  border: 1px solid #e2e8f0;
  border-radius: 6px;
  font-size: 14px;
  height: 36px;
  transition: all 0.3s ease;
  background-color: #fff;
  color: #4a5568;
}

select {
  appearance: none;
  background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6 9 12 15 18 9'%3e%3c/polyline%3e%3c/svg%3e");
  background-repeat: no-repeat;
  background-position: right 8px center;
  background-size: 16px;
  padding-right: 30px;
}

input:focus, select:focus {
  border-color: #3498db;
  box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.2);
  outline: none;
}

button {
  background-color: #3498db;
  color: #fff;
  border: none;
  cursor: pointer;
  padding: 10px 20px;
  margin: 6px 8px 6px 0;
  border-radius: 6px;
  font-weight: 500;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
  transition: all 0.2s ease;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 40px;
}

button:hover {
  background-color: #2980b9;
  transform: translateY(-1px);
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.15);
}

button:active {
  transform: translateY(0) scale(0.98);
}

.file-upload-button {
  background-color: #2ecc71;
}

.file-upload-button:hover {
  background-color: #27ae60;
}

#stopSimBtn {
  background-color: #e74c3c;
}

#stopSimBtn:hover {
  background-color: #c0392b;
}

.button-group {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 16px;
}

.button-group button {
  margin: 0;
}

#controlPanel, #simPanel > div {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  margin-top: 12px;
}

#controlPanel button, #simPanel button {
  float: none;
  margin-right: 0;
}

#controlPanel label, #simPanel label {
  float: none;
  margin-right: 0;
  line-height: 36px;
}

#controlPanel select, #simPanel select {
  float: none;
  margin-right: 0;
}

#vehicleSpeedInput {
  width: 80px;
}

#maxGreenWaveTime {
  color: #1abc9c;
  font-weight: 600;
  font-size: 16px;
  margin: 12px 0;
  display: block;
}

#circleInfo {
  color: #7f8c8d;
  font-size: 12px;
  font-style: italic;
}

.phase-section, .spawn-section {
  margin-top: 16px;
  border-top: 1px solid #e2e8f0;
  padding-top: 16px;
}

#spawnDirectionPanel {
  margin-top: 12px;
}

#loadingOverlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(4px);
  display: none;
  z-index: 1000;
}

#loadingOverlay div {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  color: #fff;
  text-align: center;
}

#loadingText {
  font-size: 20px;
  margin-bottom: 12px;
  animation: pulse 1.5s infinite;
}

#loadingProgress {
  height: 12px;
  border-radius: 6px;
  width: 280px;
  background: #e2e8f0;
}

#loadingProgress::-webkit-progress-value {
  background-color: #2ecc71;
  border-radius: 6px;
}

.file-upload-wrapper {
  position: relative;
  display: inline-block;
}

#importJsonInput, #importTrajectoriesInput {
  opacity: 0;
  position: absolute;
  width: 100%;
  height: 100%;
  cursor: pointer;
}

#speedStats {
  margin-top: 16px;
  padding: 0px;
  background: #f8fafc;
  border-radius: 8px;
  border-left: 4px solid #3498db;
}

#speedStats h3 {
  color: #3498db;
  margin: 0 0 12px 0;
}

#speedStats ul {
  margin: 0;
  padding-left: 20px;
  list-style-type: none;
}

#speedStats li {
  padding: 4px 0;
  position: relative;
}

#speedStats li::before {
  content: "•";
  color: #3498db;
  font-weight: bold;
  display: inline-block;
  width: 1em;
  margin-left: -1em;
}

#connectionMode {
  padding: 10px 15px;
  background: #f9fafb;
  border: 1px solid #e0e0e0;
  border-radius: 6px;
  white-space: nowrap;
  overflow-x: auto;
  margin-bottom: 16px;
}

#connectionMode label {
  display: inline-block;
  margin-right: 15px;
  font-family: 'Segoe UI', Arial, sans-serif;
  color: #34495e;
  cursor: pointer;
}

#connectionMode input[type="radio"] {
  margin-right: 5px;
  accent-color: #3498db;
}

#directionSubOptions {
  display: none;
  margin-left: 10px;
  padding-left: 10px;
  border-left: 2px solid #ddd;
}

#directionSubOptions.visible {
  display: block;
}

#directionSubOptions label {
  display: inline-block;
  margin-right: 15px;
  color: #555;
}

#connectionMode label:hover {
  color: #2980b9;
}

#connectionMode::-webkit-scrollbar {
  height: 6px;
}

#connectionMode::-webkit-scrollbar-thumb {
  background: #bdc3c7;
  border-radius: 3px;
}

.file-upload-label {
  display: inline-block;
  padding: 3px 3px;
  background-color: #2ecc71;
  color: #fff;
  border-radius: 4px;
  font-family: 'Segoe UI', Arial, sans-serif;
  cursor: pointer;
  transition: background-color 0.3s, transform 0.1s;
  text-align: center;
}

.file-upload-label:hover {
  background-color: #27ae60;
}

.file-upload-label:active {
  transform: scale(0.98);
}

/* Tooltip 樣式 (已存在於您的 styles.css，此處確保其適用性) */
[tooltip] {
  position: relative;
}

[tooltip]::after {
  content: attr(tooltip);
  position: absolute;
  bottom: 100%;
  left: 50%;
  transform: translateX(-50%) translateY(-5px); /* 向上偏移一些 */
  background: #2d3748;
  color: white;
  padding: 6px 10px; /* 稍微調整 padding */
  border-radius: 4px;
  font-size: 12px;
  font-weight: normal; /* Tooltip 文字不需要粗體 */
  white-space: nowrap;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.2s ease, visibility 0.2s ease, transform 0.2s ease; /* 添加 transform 動畫 */
  pointer-events: none;
  z-index: 100; /* 確保 tooltip 在最上層 */
}

[tooltip]:hover::after {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0); /* 懸停時回到正常位置 */
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes pulse {
  0% { opacity: 0.6; }
  50% { opacity: 1; }
  100% { opacity: 0.6; }
}

@media (max-width: 768px) {
  #designPanel, #simPanel {
    float: none;
    width: 100%;
    margin: 0 0 24px 0;
  }
  
  body {
    padding: 15px;
  }
  
  #controlPanel, #simPanel > div {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }
  
  button, input, select {
    width: 100%;
    margin-right: 0;
    margin-bottom: 8px;
  }
}

/* Canvas 容器樣式 */
#canvasContainer {
  width: 100%; /* 適應父容器寬度 */
  max-width: 650px; /* 限制最大寬度與 canvas 一致 */
  height: 500px; /* 固定高度，小於 canvas 的 800px 以觸發垂直滾動 */
  overflow: auto; /* 啟用水平和垂直滾動 */
  border: 1px solid #e2e8f0;
  border-radius: 6px;
  background: #fff;
  margin-top: 12px;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

/* 美化滾動條 */
#canvasContainer::-webkit-scrollbar {
  width: 8px; /* 垂直滾動條寬度 */
  height: 8px; /* 水平滾動條高度 */
}

#canvasContainer::-webkit-scrollbar-track {
  background: #f1f5f9; /* 滾動條背景色 */
  border-radius: 4px;
}

#canvasContainer::-webkit-scrollbar-thumb {
  background: #cbd5e1; /* 滾動條滑塊顏色 */
  border-radius: 4px;
}

#canvasContainer::-webkit-scrollbar-thumb:hover {
  background: #94a3b8; /* 滑鼠懸停時變深 */
}

/* Canvas 樣式調整 */
#designCanvas {
  display: block; /* 確保 canvas 不受容器影響 */
  background: #fff; /* 保持白色背景 */
}

#speedStats table {
  width: 100%;
  max-width: 800px;
  border-collapse: collapse;
  margin-bottom: 20px;
  font-size: 14px;
}

#speedStats th, #speedStats td {
  border: 1px solid #ccc;
  padding: 8px;
  text-align: center;
  vertical-align: middle;
}

#speedStats th {
  background-color: #f2f2f2;
  font-weight: bold;
}

#speedStats tr:nth-child(even) {
  background-color: #f9f9f9;
}

#speedStats h3, #speedStats h4 {
  margin: 10px 0;
}


#idmParamsPanel {
  background: #ffffff;
  border-radius: 8px;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
  padding: 25px;
  margin: 24px 1% 24px 1%; /* 與 designPanel/simPanel 的 margin 一致 */
  transition: box-shadow 0.3s ease;
  animation: fadeIn 0.5s ease-out;
}

#idmParamsPanel:hover {
  box-shadow: 0 10px 15px rgba(0, 0, 0, 0.1);
}

#idmParamsPanel h2 {
  color: #2c3e50;
  font-size: 1.6em;
  margin-bottom: 20px;
  padding-bottom: 10px;
  border-bottom: 2px solid #3498db;
  position: relative;
}

#idmParamsPanel h2::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 50px;
  height: 2px;
  background-color: #2ecc71;
}

.param-group {
  display: flex;
  align-items: center;
  margin-bottom: 15px;
  gap: 10px;
}

.param-group label {
  font-weight: 600;
  color: #4a5568;
  min-width: 150px; /* 調整以對齊標籤 */
  cursor: help; /* 提示使用者有 tooltip */
}

.param-group input[type="number"] {
  padding: 8px 12px;
  border: 1px solid #e2e8f0;
  border-radius: 6px;
  font-size: 14px;
  width: 100px; /* 固定輸入框寬度 */
  transition: all 0.3s ease;
  background-color: #fff;
  color: #4a5568;
}

.param-group input[type="number"]:focus {
  border-color: #3498db;
  box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.2);
  outline: none;
}

.param-group span {
  font-size: 14px;
  color: #718096;
}

#applyIdmParamsBtn {
  background-color: #1abc9c; /* 不同於一般按鈕的顏色 */
  color: #fff;
  border: none;
  cursor: pointer;
  padding: 10px 20px;
  margin-top: 10px; /* 與上方元素間隔 */
  border-radius: 6px;
  font-weight: 500;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
  transition: all 0.2s ease;
}

#applyIdmParamsBtn:hover {
  background-color: #16a085;
  transform: translateY(-1px);
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.15);
}

#applyIdmParamsBtn:active {
  transform: translateY(0) scale(0.98);
}

#suggestedDurationLabel {
  margin-bottom: 10px; /* Add some space below the suggestion */
}

#applySimDurationBtn, #resetSimDurationBtn {
  background-color: #5dade2; /* A slightly different blue */
  color: #fff;
  border: none;
  cursor: pointer;
  padding: 8px 15px; /* Slightly smaller padding */
  margin-right: 10px;
  border-radius: 6px;
  font-weight: 500;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
  transition: all 0.2s ease;
}

#applySimDurationBtn:hover, #resetSimDurationBtn:hover {
  background-color: #3498db;
  transform: translateY(-1px);
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.15);
}

#optimizationAlgoParamsPanel h3 {
  color: #2c3e50;
  font-size: 1.4em; /* Slightly smaller than panel title */
  margin-top: 10px;
  margin-bottom: 15px;
  padding-bottom: 8px;
  border-bottom: 1px solid #7f8c8d; /* Lighter border */
}

.algo-param-section {
  margin-bottom: 20px;
  padding: 10px;
  border: 1px solid #ecf0f1;
  border-radius: 6px;
  background-color: #fdfefe;
}

.algo-param-section h4 {
  color: #34495e;
  font-size: 1.1em;
  margin-top: 0;
  margin-bottom: 12px;
}

/* param-group styling should already be defined and will apply */

#applyAlgoParamsBtn {
  background-color: #9b59b6; /* Purple color for distinction */
  color: #fff;
  border: none;
  cursor: pointer;
  padding: 8px 15px;
  border-radius: 6px;
  font-weight: 500;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
  transition: all 0.2s ease;
}

#applyAlgoParamsBtn:hover {
  background-color: #8e44ad;
  transform: translateY(-1px);
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.15);
}

  .phase-section {
    margin-bottom: 10px;
  }
  .direction-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 5px;
  }
  .direction-table td, .direction-table th {
    padding: 2px 4px;
    text-align: center;
    font-size: 11px;
    border: 1px solid #ccc;
  }
  .direction-table th {
    font-weight: normal;
    text-align: left;
  }
  .direction-table th.main-direction,
  .direction-table th.left-turn-direction,
  .direction-table th.right-turn-direction {
    font-size: 14px;
  }
  .direction-table input[type="checkbox"] {
    margin: 0;
    vertical-align: middle;
  }
  .phase-section h4 {
    margin: 5px 0;
    font-size: 14px;
  }
  .phase-section input[type="number"] {
    width: 60px;
    padding: 2px;
    font-size: 14px;
  }