body {
      font-family: sans-serif;
      display: flex;
      justify-content: center;
      align-items: center;
      height: 100vh;
      background: #f0f0f0;
    }
    .calendar {
      background: white;
      padding: 20px;
      border-radius: 10px;
      box-shadow: 0 0 10px rgba(0,0,0,0.1);
      width: 300px;
    }
    .calendar h2 {
      text-align: center;
      margin-bottom: 10px;
    }
    .calendar table {
      width: 100%;
      border-collapse: collapse;
    }
    .calendar th, .calendar td {
      width: 14.2%;
      text-align: center;
      padding: 8px;
    }
    .calendar th {
      background: #464f59;
      color: white;
    }
    .calendar td {
      background: #e9ecef;
    }