html, body {
  margin: 0;
  padding: 0;
}
canvas {
  display: block;
  margin-left: 50px;
}
h1 {
  text-align: center;
}
.sidebar {
    background-color: #333;
    box-shadow: 0px 0px 10px rgba(30, 30, 30, 0.7);
    color: #fff;
    position: absolute;
    left: 0;
    top: 0;
    height: 100vh;
    padding: 5px;
    z-index: 1000;
}

.sidebar ul {
    display: flex;
    justify-content: center;
    align-items: flex-start;
    flex-direction: column;
    list-style-type: none;
    padding: 0;
    margin: 0;
    height: 100%;
}

.sidebar ul li {
    padding: 15px 0;
}

.sidebar input, .sidebar button {
    text-align: center;
    width: 45px;
}

.sidebar li:last-of-type {
    margin-top: auto;
}

.sidebar label {
    display: block;
    font-size: 12px;
    margin-bottom: 3px;
}