body{
margin:0;
background:#111;
font-family:sans-serif;
display:flex;
flex-direction:column;
height:100vh;
}

#toolbar{
background:#1e1e1e;
padding:8px;
display:flex;
gap:8px;
box-shadow:0 5px 20px rgba(0,0,0,.5);
}

button{
background:#2c2c2c;
color:white;
border:none;
padding:6px 10px;
border-radius:8px;
cursor:pointer;
}

canvas{
flex:1;
background:black;
}