/* main.css */
body {
  display: flex;
  background-color: #ddd;
  justify-content: center;
  align-items:  center;
  height: 100dvh;
}

.app {
  background-color: #fff;
  border: 2px solid #ccc;
  border-radius: 20px;
  width: 800px;
  height: 720px;
}

.app header, .app footer {
  display: flex;
  justify-content: center;
  align-items:  center;
  height: 60px;
}

.app header button {
  cursor: pointer;
  background-color: #ddd;
  border: none;
  border-radius: 4px;
  margin: 0 8px;
  padding: 8px 16px;
  font-size: 16px;
}

.app header button:hover:not(:active) {
  box-shadow: 0 1px 4px #888;
}

.app footer input {
  cursor: pointer;
  border: none;
  border-radius: 4px;
  width: 200px;
  margin: 0 8px;
  padding: 0;
}

.app main {
  border: 1px solid #ddd;
  border-width: 1px 0;
  height: 600px;
}

.app main canvas {
  width: 100%;
  height: 100%;
}