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

  body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background: #f9f9f9;
    color: #333;
    line-height: 1.6;
    padding: 20px;
  }
  
  .header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
  }

  .header h1 {
    font-size: 1.8rem;
    font-weight: 600;
  }
  
  .btn {
    text-decoration: none;
    background: #555;
    color: #fff;
    padding: 8px 16px;
    border-radius: 4px;
    font-size: 0.9rem;
    transition: background 0.2s;
  }

  .btn:hover {
    background: #333;
  }
  
  .current {
    background: #fff;
    padding: 12px 16px;
    border-radius: 4px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
    margin-bottom: 20px;
  }
  
  .table-container {
    overflow-x: auto;
    background: #fff;
    padding: 16px;
    border-radius: 6px;
    box-shadow: 0 1px 4px rgba(0,0,0,0.1);
  }
  
  table {
    width: 100%;
    border-collapse: collapse;
    min-width: 600px;
  }
  thead th {
    text-align: left;
    padding: 12px 8px;
    border-bottom: 2px solid #e0e0e0;
    font-weight: 500;
  }
  
  tbody td {
    padding: 12px 8px;
    border-bottom: 1px solid #f0f0f0;
  }

  tbody tr.even-row {
    background: #fafafa;
  }

  tbody tr:hover {
    background: #f0f0f0;
  }

  td.arrow {
    width: 24px;
    text-align: center;
    color: #007acc;
    font-weight: bold;
  }
  
  .current-row {
    border-left: 4px solid #007acc;
    background: #ffffff !important;
  }