body {
    font-family: sans-serif;
    background-color: #f3f3f3;
    display: flex;
    justify-content: center;
    padding: 50px;
  }
  
  .container {
    background-color: #fff;
    padding: 30px;
    border-radius: 10px;
    width: 400px;
    box-shadow: 0 0 10px rgba(0,0,0,0.1);
  }
  
  h1 {
    text-align: center;
    margin-bottom: 20px;
  }
  
  .input-group {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
  }
  
  input {
    flex: 1;
    padding: 10px;
    border-radius: 5px;
    border: 1px solid #ccc;
  }
  
  button {
    padding: 10px 15px;
    background-color: #007bff;
    border: none;
    color: white;
    border-radius: 5px;
    cursor: pointer;
  }
  
  ul {
    list-style: none;
    padding: 0;
  }
  
  li {
    background-color: #f0f0f0;
    padding: 10px;
    margin-bottom: 10px;
    border-radius: 5px;
    display: flex;
    justify-content: space-between;
    align-items: center;
  }
  
  li button {
    background-color: red;
    padding: 5px 10px;
    border: none;
    color: white;
    border-radius: 5px;
    cursor: pointer;
  }