body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
            background-color: #f4f4f9;
            margin: 0;
            padding: 20px;
            display: flex;
            justify-content: center;
        }
        .container {
            width: 100%;
            max-width: 400px;
            background: #ffffff;
            border-radius: 10px;
            box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
            padding: 25px;
        }
        h1 {
            text-align: center;
            color: #333;
            margin-top: 0;
        }
        form {
            display: flex;
            margin-bottom: 20px;
        }
        #input-item {
            flex-grow: 1; 
            padding: 10px 15px;
            font-size: 1rem;
            border: 2px solid #ddd;
            border-radius: 8px 0 0 8px;
            outline: none;
            transition: border-color 0.2s;
        }
        #input-item:focus {
            border-color: #007bff;
        }
        form button {
            padding: 10px 20px;
            font-size: 1rem;
            font-weight: 600;
            border: none;
            background-color: #007bff;
            color: white;
            cursor: pointer;
            border-radius: 0 8px 8px 0;
            transition: background-color 0.2s;
        }
        form button:hover {
            background-color: #0056b3;
        }
        ul {
            list-style-type: none;
            padding: 0;
            margin: 0;
        }
        li {
            display: flex;
            justify-content: space-between; 
            align-items: center;
            padding: 12px 15px;
            background: #fdfdfd;
            border-bottom: 1px solid #eee;
            font-size: 1.1rem;
            color: #444;
        }
        li:first-child {
            border-top-left-radius: 8px;
            border-top-right-radius: 8px;
        }
        li:last-child {
            border-bottom: none;
            border-bottom-left-radius: 8px;
            border-bottom-right-radius: 8px;
        }
        .tombol-hapus {
            padding: 5px 10px;
            font-size: 0.9rem;
            border: none;
            background-color: #dc3545;
            color: white;
            border-radius: 5px;
            cursor: pointer;
            transition: background-color 0.2s;
        }
        .tombol-hapus:hover {
            background-color: #c82333;
        }