html {
            box-sizing: border-box;
        }
        
        *,
        *::before,
        *::after {
            box-sizing: inherit;
        }
        
        html,
        body {
            width: 100%;
            height: 100%;
            margin: 0;
            padding: 0;
            /* overflow: hidden; */
        }
        
      

        .container {
            display: flex;
            justify-content: center;
            align-items: center;
            flex-direction: column;
        }
        
        h1 {
            font-family: 'Open Sans', sans-serif;
            font-weight: 300;
        }
        
        /*
         * Styles for the deck of cards
         */
        
        .deck1 {
            width: 660px;
            min-height: 320px;
            background: linear-gradient(160deg, rgba(46, 61, 73, 0.5) 0%, rgba(224, 229, 233, 0.5) 100%);
            padding: 32px;
            border-radius: 10px; 
            box-shadow: 12px 15px 20px 0 rgba(46, 61, 73, 0.5);
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            margin: 0 0 2px;
        }
        
        .deck2 {
            width: 660px;
            min-height: 320px;
            background: linear-gradient(160deg, rgba(46, 61, 73, 0.5) 0%, rgba(224, 229, 233, 0.5) 100%);
            padding: 32px;
            border-radius: 10px; 
            box-shadow: 12px 15px 20px 0 rgba(46, 61, 73, 0.5);
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            margin: 10px 0 10px;
        }
        
        
        
        
        /*
         * Styles for the Score Panel
         */
        
        .score-panel {
            text-align: left;
            width: 345px;
            margin-bottom: 10px;
        }
        
        .score-panel .stars {
            margin: 0;
            padding: 0;
            display: inline-block;
            margin: 0 5px 0 0;
        }
        
        .score-panel .stars li {
            list-style: none;
            display: inline-block;
        }
        
        .gold-star{color: gold}
        
        .score-panel .restart {
            float: right;
            cursor: pointer;
        }
        
        /* Popup */
        .popup {
            background: #02ccba;
            z-index: 1;
            display: none;
            margin: 0 auto;
            width: 100%; 
            height: 100%; 
            position: fixed; 
            left: 0;
            top: 0;
        }
        
        .content {
            padding: 10px;
            margin: 0 auto;
            background-color: rgba(255, 255, 255, 0.562);
            height: 100%;
            width: 100%;
            text-align: center;
            
        }
        
        .close {
            color: #000;
            float: right;
            font-size: 35px;
            font-weight: bold;
        }
        
        .close:hover,
        .close:focus {
            color: #fff;
            text-decoration: none;
            cursor: pointer;
        }
        
        .gcard{
            height: 300px; 
            width: 550px;
            /* border-radius: 8px; */
            cursor: pointer;
            box-shadow: 12px 15px 20px 0 rgba(46, 61, 73, 0.5);
        }