/* =========================================
   常用光学参数计算 - 页面样式
   ========================================= */

/* 页面头部 */
.calc-hero {
  padding: 120px 0 40px;
  text-align: center;
  background: linear-gradient(135deg, #cfddf2 0%, #d8e4f4 50%, #d4e0f2 100%);
}

.calc-hero h1 {
  font-size: 2.4rem;
  font-weight: 800;
  margin-bottom: 12px;
  color: var(--text);
}

.calc-hero p {
  font-size: 1.05rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
}

/* 计算器标签导航 */
.calc-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: center;
  padding: 24px 0;
  position: sticky;
  top: var(--nav-height);
  background: rgba(232, 238, 246, 0.95);
  backdrop-filter: blur(8px);
  z-index: 50;
  border-bottom: 1px solid var(--border);
}

.calc-tab {
  padding: 10px 22px;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-secondary);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 24px;
  cursor: pointer;
  transition: all var(--transition);
  white-space: nowrap;
}

.calc-tab:hover {
  color: var(--primary);
  border-color: var(--primary-light);
  background: var(--primary-bg);
}

.calc-tab.active {
  color: #fff;
  background: var(--primary);
  border-color: var(--primary);
  box-shadow: 0 2px 8px rgba(37, 99, 235, 0.3);
}

/* 计算器面板 */
.calc-panel {
  display: none;
  padding: 40px 0 60px;
  animation: fadeInPanel 0.35s ease;
}

.calc-panel.active {
  display: block;
}

@keyframes fadeInPanel {
  from { opacity: 0; transform: translateY(12px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* 计算器卡片容器 */
.calc-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  margin-bottom: 24px;
}

.calc-card h3 {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--text);
}

.calc-card .calc-desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: 24px;
  line-height: 1.7;
}

/* 表单布局 */
.calc-form {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 20px;
  margin-bottom: 24px;
}

.calc-field {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.calc-field label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.calc-field input,
.calc-field select {
  padding: 10px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  color: var(--text);
  background: var(--bg);
  transition: border-color var(--transition);
  outline: none;
}

.calc-field input:focus,
.calc-field select:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

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

/* 计算按钮 */
.calc-actions {
  margin-bottom: 24px;
}

.calc-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 32px;
  background: var(--primary);
  color: #fff;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
}

.calc-btn:hover {
  background: var(--primary-dark);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
}

/* 结果区域 */
.calc-result {
  background: var(--surface-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 24px;
  margin-top: 16px;
}

.calc-result h4 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--primary);
}

.result-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 16px;
}

.result-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 16px;
  text-align: center;
}

.result-item .result-label {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 6px;
}

.result-item .result-value {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text);
}

.result-item .result-unit {
  font-size: 0.8rem;
  color: var(--text-secondary);
  margin-left: 4px;
}

/* 结果表格 */
.calc-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 16px;
  font-size: 0.9rem;
}

.calc-table th,
.calc-table td {
  padding: 10px 14px;
  text-align: center;
  border: 1px solid var(--border);
}

.calc-table th {
  background: var(--primary);
  color: #fff;
  font-weight: 600;
  font-size: 0.85rem;
}

.calc-table tr:nth-child(even) {
  background: var(--surface-alt);
}

.calc-table tr:hover {
  background: var(--primary-bg);
}

/* Canvas 图表容器 */
.chart-container {
  margin-top: 20px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 16px;
  text-align: center;
}

.chart-container canvas {
  max-width: 100%;
  height: auto;
}

/* 公式显示 */
.formula-box {
  background: #dce5f2;
  border: 1px solid var(--border);
  border-left: 4px solid var(--primary);
  border-radius: var(--radius-sm);
  padding: 16px 20px;
  margin: 16px 0;
  font-family: 'Cambria Math', 'Times New Roman', serif;
  font-size: 1rem;
  color: var(--text);
  line-height: 2;
}

/* 拉曼波长选择按钮组 */
.wavelength-group {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.wavelength-btn {
  padding: 8px 20px;
  border: 2px solid var(--border);
  border-radius: 20px;
  background: var(--surface);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
  color: var(--text-secondary);
}

.wavelength-btn:hover {
  border-color: var(--primary-light);
  color: var(--primary);
}

.wavelength-btn.active {
  border-color: var(--primary);
  background: var(--primary);
  color: #fff;
}

/* 双向转换箭头区域 */
.convert-row {
  display: flex;
  align-items: flex-end;
  gap: 16px;
  flex-wrap: wrap;
}

.convert-row .calc-field {
  flex: 1;
  min-width: 200px;
}

.convert-arrow {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  background: var(--primary);
  color: #fff;
  border: none;
  border-radius: 50%;
  font-size: 1.2rem;
  cursor: pointer;
  transition: all var(--transition);
  flex-shrink: 0;
  margin-bottom: 2px;
}

.convert-arrow:hover {
  background: var(--primary-dark);
  transform: scale(1.1);
}

/* 信息提示 */
.calc-info {
  display: block;
  background: #d4e2f5;
  border: 1px solid #a8bedc;
  border-radius: var(--radius-sm);
  padding: 14px 18px 14px 44px;
  margin: 16px 0;
  font-size: 0.88rem;
  color: #1e40af;
  line-height: 1.7;
  position: relative;
}

.calc-info::before {
  content: "i";
  position: absolute;
  left: 14px;
  top: 14px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 20px;
  height: 20px;
  background: #2563eb;
  color: #fff;
  border-radius: 50%;
  font-size: 0.75rem;
  font-weight: 700;
}

/* 光谱分析 canvas 鼠标样式 */
#spectrum-line-canvas {
  cursor: crosshair;
}
#spectrum-heat-canvas {
  cursor: default;
}

/* 响应式 */
@media (max-width: 768px) {
  .calc-hero {
    padding: 100px 0 30px;
  }
  .calc-hero h1 {
    font-size: 1.6rem;
  }
  .calc-tabs {
    gap: 6px;
    padding: 16px 12px;
  }
  .calc-tab {
    padding: 8px 14px;
    font-size: 0.82rem;
  }
  .calc-card {
    padding: 20px;
  }
  .calc-form {
    grid-template-columns: 1fr;
  }
  .result-grid {
    grid-template-columns: 1fr;
  }
  .convert-row {
    flex-direction: column;
    align-items: stretch;
  }
  .convert-arrow {
    align-self: center;
    transform: rotate(90deg);
  }
}