* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html, body {
  height: 100%;
  width: 100%;
}

#main {
    height: 100%;
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.shape{
    height: 200px;
    width: 200px;
    margin-top: 10px;
    margin-left: 10px;
    border: 2px solid black;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    display: flex;
    align-items: center;
    justify-content: center;
}

.rect{
    display: flex;
    justify-content: center;
    align-items: center;
}