Калькулятор стоимости изделий
    
        body {
            font-family: 'Roboto Condensed', sans-serif;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 20px;
        }
        label, input, select, button {
            display: block;
            margin: 10px 0;
        }
        .checkbox-group {
            display: flex;
            flex-direction: column;
        }
        #finalCost {
            margin-top: 20px;
            font-size: 1.2em;
            color: green;
        }
        #copyMessage {
            display: none;
            color: red;
            margin-top: 10px;
        }