header {
      background-color: #2980b9;
      color: white;
      position: fixed;
      font-family: Arial, sans-serif;
      top: 0;
      left: 0;
      width: 100%;
      height: 70px;
      display: flex;
      align-items: center;
      justify-content: center;
      padding: 0 20px;
      box-sizing: border-box;
      z-index: 100;
      position: fixed;
    }

    .header-left {
      position: absolute;
      left: 20px;
      display: flex;
      gap: 10px;
    }

    header h1 {
      margin: 0;
      font-size: 24px;
      color: aliceblue;
      text-align: center;
      flex-grow: 1;
    }

    header button {
      background-color: transparent;
      border: none;
      color: white;
      font-size: 18px;
      cursor: pointer;
      padding: 6px 12px;
      border-radius: 6px;
      transition: background-color 0.3s ease;
    }

    header button:hover {
      background-color: rgba(255, 255, 255, 0.2);
    }

    body {
      font-family: Arial, sans-serif;
      background: #f7f9fc;
      margin-top: 63px;
      padding: 20px;
      color: #333;
    }

    .container {
      margin: 70px auto 0 auto;
      max-width: 700px;
      background: white;
      padding: 25px;
      border-radius: 8px;
      box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    }

    h1 {
      text-align: center;
      margin-bottom: 20px;
      color: #2c3e50;
    }

    form label {
      display: block;
      margin: 10px 0 6px;
      font-weight: bold;
    }

    input[type="text"],
    input[type="number"],
    input[type="time"] {
      padding: 8px;
      width: 60%;
      max-width: 250px;
      border: 1px solid #ccc;
      border-radius: 4px;
    }

    #addSubject {
      margin-top: 10px;
      padding: 8px 12px;
      cursor: pointer;
      background-color: #3498db;
      border: none;
      color: white;
      border-radius: 4px;
    }

    #addSubject:hover {
      background-color: #2980b9;
    }

    button[type="submit"],
    #resetSchedule {
      background-color: #27ae60;
      color: white;
      padding: 10px 15px;
      border: none;
      border-radius: 5px;
      cursor: pointer;
      margin-top: 15px;
      font-size: 1rem;
    }

    button[type="submit"]:hover,
    #resetSchedule:hover {
      background-color: #1e8449;
    }

    .subject {
      margin-bottom: 10px;
    }

    #scheduleOutput {
      margin-top: 20px;
      overflow-x: auto;
    }

    table {
      border-collapse: collapse;
      width: 100%;
    }

    th,
    td {
      border: 1px solid #ddd;
      padding: 8px;
      text-align: center;
    }

    th {
      background-color: #2980b9;
      color: white;
    }

    tr:nth-child(even) {
      background-color: #f2f2f2;
    }

    .completed {
      text-decoration: line-through;
      color: gray;
    }

    .break {
      background-color: #ffeaa7;
      font-style: italic;
    }

    .checkbox-cell {
      width: 40px;
    }

    @media (max-width: 600px) {

      input[type="text"],
      input[type="number"],
      input[type="time"] {
        width: 100%;
      }
    }

    footer {
      text-align: center;
      padding: 15px;
      background: #89c0e4;
      margin-top: 120px;
      font-size: 0.8rem;
      color: #666;
    }

    .break,.break-cell {
  background-color: #ff4d4d; 
  color: white;
  font-style: italic;
}