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

.copyright{
    text-align: center;
    font-size: 18px;
    font-weight: 400;
}