body {
            background: linear-gradient(to right, #4a0667, #80255d);
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }

        #rand-rekenmachine {
            box-shadow: 0px 20px 40px rgba(0, 0, 0, 0.3);
            width: 800px;
            height: 900px;
            border: 1px solid black;
            background-color: #2d2f33;
            margin: auto;
            border-radius: 20px;
            transition: transform 0.2s ease;
            user-select: none;
        }

        #rand-rekenmachine:hover {
            transform: scale(1.01);
        }

        #schermpje {
            margin-top: 10px;
            margin-left: auto;
            margin-right: auto;
            width: 700px;
            height: 250px;
            background-color: #8b9b6a;
            border: 10px solid #444;
            color: #e4e6eb;
            font-size: 50px;
            display: flex;
            justify-content: flex-end;
            align-items: flex-end;
            padding: 20px;
            box-sizing: border-box;
            border-radius: 10px;
            overflow: hidden;
            color: black;
        }

        #rand-knoppen {
            width: 700px;
            height: 550px;
            background-color: transparent;
            display: grid;
            grid-template-columns: repeat(5, 1fr);
            margin-left: auto;
            margin-right: auto;
            gap: 10px;
            padding-top: 20px;
        }

        .knop {
            margin: auto;
            width: 100px;
            height: 100px;
            border-radius: 50%;
            border: none;
            font-size: 32px;
            background-color: #4a4e55;
            color: #ffffff;
            font-weight: 600;
            cursor: pointer;
            transition: transform 0.2s ease, background-color 0.2s ease;
        }

        .knop:hover {
            transform: scale(1.10);
            background-color: #5a5f68;
        }

        .knopboven {
            margin-left: auto;
            margin-right: auto;
            margin-bottom: 10px;
            margin-top: 10px;
            width: 100px;
            height: 30px;
            border-radius: 10%;
            border: none;
            font-size: 25px;
            background-color: #828282;
            color: #000000;
            font-weight: 600;
            cursor: pointer;
            transition: transform 0.2s ease, background-color 0.2s ease;
        }

        .knopboven:hover {
            transform: scale(1.05);
            background-color: #6e6e6e;
            color: lightgray;
        }

        #DEL,
        #AC {
            background-color: #d9534f !important;
            color: white !important;
        }

        #DEL:hover,
        #AC:hover {
            background-color: #c9302c !important;
        }

        #schermpje::placeholder {
            color: black;
        }