@import url('https://fonts.googleapis.com/css2?family=Roboto:wght@400;700&display=swap');
 
*{
    box-sizing: border-box;
}
body{
    background-color: #f5f5f5;
    font-family: 'Roboto',sans-serif;
    margin: 0;
    display: flex;
    flex-direction: column;
    height: 100vh;
    align-items: center;
    justify-content: center;
}

canvas{
    border:2px solid steelblue;
}

.toolbox{
    background-color: steelblue;
    border: 1px solid slateblue;
    width: 804px;
    padding: 1rem;
    display: flex;
}

.toolbox > *{
    background-color: #fff;
    border: none;
    font-size: 2rem;
    display: inline-flex;
    justify-content: center;
    align-items: center;
    margin: 0.25rem;
    padding: 0.25rem;
    height: 50px;
    width: 50px;
    cursor: pointer;
}

.toolbox *:last-child{
    margin-left: auto;
}