@import url('https://fonts.googleapis.com/css2?family=Montserrat:400,600&display=swap');

* {
    box-sizing: border-box;
}

body {
    background-color: #f5f5f5;    
    font-family: 'Montserrat', sans-serif;
    display: flex;  
    flex-direction: column;  
    align-items: center;
    justify-content: center;
    height: 100vh;
    margin: 0
    
}
canvas {
    border: 2px solid steelblue;
}
.toolbox {
    background-color: steelblue;
    border: 2px solid slateblue;
    display: flex;
    width: 804px;
    padding: 1rem;
}

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

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