scanner-thingy/src/app.css

html,
body {
  overflow: hidden;
}

:root {
  --rx: 6rem;
  --ry: 8rem;
}

.app {
  user-select: none;
  height: 100vh;
  overflow: hidden;
  display: grid;
  grid-template-columns: 70px 1fr 70px;
  grid-template-rows: 90px 200px 1fr 80px 120px;
  width: 100%;
}

.app .overlay {
  grid-column: 2/3;
  grid-row: 3/4;
  border-radius: 2px;
  box-shadow: 0 0 0 1000rem rgba(0, 0, 0, 0.7);
}

.app .header {
  grid-column: 1/4;
  grid-row: 1/2;
  background: #0080a3;
}

.app .headtext {
  grid-column: 1/4;
  grid-row: 2/3;
  color: white;
  margin: auto;
  font-size: 24pt;
}

.app .success {
  grid-column: 1/5;
  grid-row: 1/6;
  font-size: 48pt;
  color: #96fc46;
  background: #000000;
  display: flex;
}
.app .success div {
  user-select: none;
  margin: auto;
}

.app .footer {
  grid-column: 1/4;
  grid-row: 5/6;
  background: #000000;
}

.app .webcam {
  grid-column: 1 / 3;
  grid-row: 1 / 2;
  height: 100vh;
}