body {
    padding: 0.5rem 1rem;
}
strong {
  display: block;
  text-align: center;
  margin-block-start: 2.5rem;
}
.g_id_signin iframe {
  color-scheme: auto;
}
nav {
  display:flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap-reverse;
  h2 { margin-block: 0; }
}
input[type='file'] {
  border: 1px inset #c3c3c3;
  padding: .2rem;
  border-radius: 3px;
  width: 100%;
}
label {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  text-wrap: nowrap;
}
menu {
  display: flex;
  align-items: center;
  justify-content: space-evenly;
  list-style:none;
}
form {
  display: grid;
  gap: 0.5rem;
  max-width: 35rem;
  margin: 0 auto;
}
#preview iframe {
  height:75svh;
  width: 100%;
}