div.titles { display: flex; justify-content: space-between; }
input#title { margin: 10px; margin-bottom: 8px; font-size: 20px; width: 100%; font-family:monospace; }
input#right_title { margin: 10px; margin-bottom: 8px; font-size: 20px; width: 100%; font-family:monospace; }

div.container { display: flex; height: calc(100vh - 84px); }

aside { margin: 0 12px; display: flex; flex-direction: column; }
aside > input { height: 40px; margin-bottom: 8px; width: 94px; }
aside > button { height: 40px; margin-bottom: 8px; width: 94px; }

canvas { width: 100%; height: 100%; }