.container {
            max-width: 500px;
            margin: 30px auto;
            background: white;
            padding: 25px;
            border-radius: 10px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.1);
        }
        h1 {
            text-align: center;
            color: #4285f4;
            margin-bottom: 15px;
        }
        .password-display {
            display: flex;
            margin-bottom: 20px;
            border: 2px solid #ddd;
            border-radius: 8px;
            overflow: hidden;
        }
        #passwordOutput {
            flex-grow: 1;
            padding: 12px;
            font-size: 18px;
            border: none;
            outline: none;
            background: #f8f9fa;
        }
        #copyBtn {
            background: #4285f4;
            color: white;
            border: none;
            padding: 0 20px;
            cursor: pointer;
            transition: background 0.3s;
        }
        #copyBtn:hover {
            background: #3367d6;
        }
        .options {
            margin-bottom: 20px;
        }
        .option-group {
            margin-bottom: 10px;
        }
        .option-group label {
            margin-left: 8px;
            cursor: pointer;
        }
        .length-control {
            margin-bottom: 15px;
        }
        #lengthSlider {
            width: 100%;
        }
        #lengthValue {
            display: inline-block;
            width: 30px;
            text-align: center;
            font-weight: bold;
        }
        #generateBtn {
            background: #34a853;
            color: white;
            border: none;
            padding: 12px;
            width: 100%;
            font-size: 16px;
            border-radius: 8px;
            cursor: pointer;
            font-weight: bold;
            transition: background 0.3s;
        }
        #generateBtn:hover {
            background: #2d9248;
        }
        .strength-meter {
            height: 8px;
            background: #eee;
            border-radius: 4px;
            margin: 15px 0;
            overflow: hidden;
        }
        #strengthBar {
            height: 100%;
            width: 0%;
            background: #ea4335;
            transition: all 0.3s;
        }