* {
      box-sizing: border-box;
    }
    body {
      font-family: Arial, sans-serif;
      background-color: #f4f4f4;
      margin: 0;
      padding: 0;
      display: flex;
      justify-content: center;
      align-items: center;
      height: 100vh;
    }
    .container {
      background: white;
      padding: 20px;
      border-radius: 8px;
      width: 100%;
      max-width: 400px;
      box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
    }
    h2 {
      text-align: center;
      margin-bottom: 20px;
    }
    input[type="text"] {
      width: 100%;
      padding: 10px;
      margin-bottom: 10px;
      border: 1px solid #ccc;
      border-radius: 4px;
    }
    button {
      padding: 10px;
      background-color: #4CAF50;
      color: white;
      border: none;
      border-radius: 4px;
      cursor: pointer;
      width: 100%;
      margin-bottom: 10px;
    }
    .task {
      background-color: #f9f9f9;
      padding: 10px;
      margin: 5px 0;
      border-radius: 4px;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .buttons button {
      margin-left: 5px;
      background-color: #6c63ff;
    }
    .buttons .delete {
      background-color: #ff4c4c;
    }
    @media (max-width: 500px) {
      .task {
        flex-direction: column;
        align-items: flex-start;
      }
      .buttons {
        margin-top: 10px;
      }
    }