html,
body {
  margin: 0;
  min-width: 1424px;
  min-height: 1203px;
  background: #ffffff;
}

body {
  font-family: Arial, sans-serif;
}

.canvas {
  position: relative;
  width: 1424px;
  height: 1203px;
  background: #ffffff;
  overflow: hidden;
}

.arch {
  position: absolute;
  left: 358px;
  top: 305px;
  width: 708px;
  height: 898px;
  background: #cccccc;
  border-radius: 354px 354px 0 0;
}