body {
    font-family: Arial, sans-serif;
    padding: 2rem;
    background: #f4f4f4;
  }
  
  h1 {
    color: #333;
  }
  
  .card {
    background: white;
    padding: 1.5rem;
    border-radius: 10px;
    box-shadow: 0 0 10px rgba(0,0,0,0.1);
    max-width: 500px;
    margin-bottom: 1rem;
  }
  
  label {
    font-weight: bold;
    display: block;
    margin-top: 1rem;
  }
  
  select, button {
    width: 100%;
    padding: 0.6rem;
    margin-top: 0.5rem;
    border-radius: 5px;
    border: 1px solid #ccc;
    font-size: 1rem;
  }
  
  button {
    background-color: #007BFF;
    color: white;
    cursor: pointer;
  }
  
  button:hover {
    background-color: #0056b3;
  }
  
  #log {
    margin-top: 1rem;
    font-style: italic;
    color: green;
  }
  
  #calendar {
    margin-top: 2rem;
    background: white;
    padding: 1rem;
    border-radius: 10px;
    box-shadow: 0 0 10px rgba(0,0,0,0.1);
    max-width: 1000px;
    overflow-x: auto;
  }
  
  table {
    width: 100%;
    border-collapse: collapse;
  }
  
  th, td {
    border: 1px solid #ddd;
    padding: 8px;
    vertical-align: top;
  }
  
  th {
    background-color: #f2f2f2;
  }
  
  td {
    height: 100px;
  }
  
  .event {
    background-color: #007BFF;
    color: white;
    padding: 2px 4px;
    border-radius: 3px;
    font-size: 0.85rem;
    margin-top: 2px;
    display: block;
  }
  
  nav a {
    margin-right: 20px;
    text-decoration: none;
    color: #007BFF;
  }
  
  nav a:hover {
    text-decoration: underline;
  }