.main {
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
        }
        .canvas {
            border: 2px solid black;
        }
        .top {
            display: flex;
            justify-content: space-between;
            margin: 20px 0;
        }
        .bottom {
            display: flex;
            justify-content: space-evenly;
            margin: 20px 0;
        }
        .block, input, select, button {
            width: 80%;
        }
        .top > .block {
            margin-top: 170px;
            margin-bottom: 30px;
        }
        .bottom > button {
            width: auto;
            padding: 10px 20px;
        }
        .block > p {
            margin: 10px auto;
            width: 50%;
        }