body {
  font-family: Inter, system-ui, Arial, sans-serif;
  margin: 0;
  padding: 24px;
  background: #f5f7fb;
}

.app {
  max-width: 560px;
  margin: 0 auto;
  display: grid;
  gap: 14px;
}

label {
  font-size: 14px;
  color: #333;
}

select {
  margin-left: 8px;
  padding: 6px 8px;
}

.rect {
  width: 100%;
  height: 180px;
  border-radius: 12px;
  border: 1px solid #d8deea;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
}