body{
    margin:0;
    font-family: system-ui;
    background:#121212;
    color:white;
    text-align:center;
}

header{
    padding:40px;
}

.upload{
    display:inline-block;
    padding:14px 24px;
    background:#2196F3;
    border-radius:14px;
    cursor:pointer;
}

input{
    display:none;
}

button, select{
    padding:12px;
    margin:12px;
    border:none;
    border-radius:10px;
}

canvas{
    max-width:90%;
    margin-top:20px;
    border-radius:20px;
    background:#222;
}