@import url("https://fonts.googleapis.com/css2?family=Mulish:ital,wght@0,200;0,300;0,400;0,500;0,600;0,700;0,800;0,900;0,1000;1,200;1,300;1,400;1,500;1,600;1,700;1,800;1,900;1,1000&display=swap");

* {
  box-sizing: border-box;
}
body {
  background-color: #f5f5f5;
  font-family: "Mulish", 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: 1px solid slateblue;
  display: flex;
  width: 804px;
  padding: 0.2rem 1rem;
  outline: none;
  margin-top: 1rem;
}
.toolbox > * {
  background-color: #fff;
  border: none;
  border-radius: 10%;
  align-items: center;
  justify-content: center;
  text-align: center;
  font-size: 1.5rem;
  font-weight: 600;
  height: 40px;
  width: 40px;
  margin: 0.25rem;
  padding: 0.25rem;
  cursor: pointer;
}
.toolbox > *:last-child {
  margin-left: auto;
}