body {
      max-width: 480px;
      margin: 30px auto;
      padding: 0 16px;
      background: black;
    }

    h1 {
      text-align: center;
      color: #2c3e50;
      margin-bottom: 10px;
    }

    .input-row {
      display: flex;
      gap: 8px;
      margin-bottom: 10px;
    }

    input[type="text"] {
      flex: 1;
      padding: 12px 16px;
      border: 1px solid whitesmoke;
      border-radius: 8px;
      outline: none;
    }

    input[type="text"]:focus {
      border-color: #3498db;
      box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.15);
    }

    button {
      padding: 0 24px;
      background: #3498db;
      color: white;
      border: none;
      border-radius: 8px;
      cursor: pointer;
      transition: background 0.2s;
    }

    button:hover {
      background: #2980b9;
    }

    button:active {
      background: #1f6391;
    }

    ul {
      list-style: none;
      padding: 0;
      margin: 0;
    }

    li {
      background: white;
      padding: 14px 16px;
      margin-bottom: 8px;
      border-radius: 8px;
      box-shadow: 0 1px 3px rgba(0,0,0,0.08);
    }