* {
  box-sizing: border-box;
}
body {
  margin: 0;
  color: #253832;
  background: #f3f6f3;
  font:
    14px/1.5 system-ui,
    sans-serif;
}
header {
  min-height: 56px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  padding: 12px 20px;
}
header div {
  margin-left: auto;
  display: flex;
  gap: 12px;
  align-items: center;
}
button,
a {
  font: inherit;
  color: inherit;
}
button {
  border: 1px solid #becfc5;
  border-radius: 6px;
  padding: 5px 12px;
  cursor: pointer;
  background: white;
}
#viewer {
  overflow: auto;
  height: calc(100dvh - 64px);
}
#canvas {
  position: relative;
  margin: 0 auto;
}
iframe {
  display: block;
  width: 1680px;
  height: 1011px;
  border: 0;
  transform-origin: top left;
}
img {
  max-width: 100%;
}