body {
      font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
      padding: 20px;
      background-color: #f8f9fa;
      color: #333;
      margin: 0;
    }
    h1 {
      color: #2c3e50;
      text-align: center;
      margin-bottom: 30px;
      font-weight: 600;
      border-bottom: 2px solid #3498db;
      padding-bottom: 10px;
      background: linear-gradient(135deg, #74b9ff, #0984e3);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      text-shadow: 0 2px 4px rgba(0,0,0,0.1);
    }
    
    .content-form-group {
      background: white;
      padding: 20px;
      border-radius: 12px;
      box-shadow: 0 4px 20px rgba(0,0,0,0.08);
      margin-bottom: 25px;
      display: flex;
      align-items: center;
      flex-wrap: wrap;
      gap: 15px;
      border: 1px solid #eef2f7;
    }
    .form-item {
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .button-group {
      flex-grow: 1;
      display: flex;
      justify-content: space-between;
      gap: 10px;
    }

    label {
      font-weight: 500;
      text-align: right;
      color: #2c3e50;
      min-width: 100px;
      font-size: 14px;
      white-space: nowrap;
    }
    input {
      padding: 10px 12px;
      border: 1px solid #ddd;
      border-radius: 6px;
      font-size: 14px;
      transition: all 0.3s ease;
      background-color: #f8fafc;
      min-width: 110px;
      flex: 1;
    }
    input:focus {
      outline: none;
      border-color: #74b9ff;
      box-shadow: 0 0 0 3px rgba(116, 185, 255, 0.2);
      background-color: white;
    }

    button {
      padding: 10px 20px;
      cursor: pointer;
      border: none;
      border-radius: 6px;
      font-size: 14px;
      font-weight: 500;
      transition: all 0.3s ease;
      box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    }
    button:hover {
      transform: translateY(-2px);
      box-shadow: 0 6px 12px rgba(0,0,0,0.15);
    }
    button:active {
      transform: translateY(0);
    }
    .query-btn {
      background: linear-gradient(135deg, #74b9ff, #0984e3);
      color: white;
    }
    .query-btn:hover {
      background: linear-gradient(135deg, #0984e3, #0984e3);
    }
    .export-btn {
      background: linear-gradient(135deg, #00b894, #00a085);
      color: white;
      border: none;
    }
    .export-btn:hover {
      background: linear-gradient(135deg, #00b894, #00b894);
    }

    table {
      border-collapse: separate;
      border-spacing: 0;
      width: 100%;
      margin-top: 20px;
      background-color: white;
      border-radius: 12px;
      overflow: hidden;
      box-shadow: 0 6px 20px rgba(0,0,0,0.08);
      border: 1px solid #eef2f7;
    }
    th, td {
      padding: 14px 16px;
      text-align: center;
      position: relative;
      border-bottom: 1px solid #eee;
    }
    th {
      background-color: #3498db;
      color: white;
      font-weight: 600;
      text-transform: uppercase;
      letter-spacing: 0.5px;
      user-select: none;
      font-size: 16px;
    }
    tr:nth-child(even) {
      background-color: #f8fafc;
    }
    tr:hover {
      background-color: #e3f2fd;
      transition: background-color 0.2s ease;
    }

    .sort-btn {
      font-size: 14px;
      margin-left: 8px;
      cursor: pointer;
      color: rgba(255, 255, 255, 0.8);
      transition: color 0.3s ease;
    }
    .sort-btn:hover {
      color: white;
    }
    .col-sort-menu {
      position: absolute;
      background: white;
      border: 1px solid #ddd;
      border-radius: 6px;
      z-index: 100;
      display: none;
      min-width: 80px;
      box-shadow: 0 6px 20px rgba(0,0,0,0.15);
      overflow: hidden;
    }
    .col-sort-menu button {
      display: block;
      width: 100%;
      padding: 10px 15px;
      border: none;
      background: transparent;
      text-align: left;
      cursor: pointer;
      font-size: 13px;
      transition: all 0.2s ease;
      color: #2d3436;
    }
    .col-sort-menu button:hover {
      background-color: #f1f2f6;
    }
    .col-sort-menu button.active {
      background-color: #74b9ff;
      font-weight: 600;
      color: white;
    }

    #content-chart {
      height: 60vh;
      margin-top: 30px;
      background: white;
      border-radius: 12px;
      box-shadow: 0 6px 20px rgba(0,0,0,0.08);
      padding: 15px;
      border: 1px solid #eef2f7;
    }