body {
  font-family: Calibri, sans-serif;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  min-height: 100dvh;

  --bg: #0078b4;
  --fg: white;
}

* {
  box-sizing: border-box;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  margin: 0;
}

header {
  background-color: var(--bg);
  color: white;
  padding: 0.5em;

  h1 {
    font-size: 1em;
  }

  h2 {
    /* the main heading actually */
    font-size: 1.5em;
  }
}

footer {
  background-color: var(--bg);
  color: white;
  padding: 0.5em;
  margin-top: auto;
}

main {
  padding: 1em 0.5em 0.5em 0.5em;

  section {
    display: flex;

    flex-direction: column;
    gap: 1em;

    h2 {
      font-size: 1.5em;
    }

    h3 {
      font-size: 1.3em;
    }
  }
}

.hidden {
  display: none !important;
}

button.list-selector,
button.continue {
  margin: 0 auto;
  width: 75dvw;
  min-height: 8dvh;
  font: inherit;
  font-size: 1em;
  text-wrap: balance;
  background: var(--bg);
  color: var(--fg);

  &:disabled {
    opacity: 0.3;
    filter: grayscale(100%);
  }
}

span.big {
  display: block;
  font-size: 3em;
}

label.checkbox-selector,
label.radio-selector {
  margin: 0 auto;
  width: 75dvw;
  min-height: 8dvh;
  font: inherit;
  font-size: 1em;
  text-wrap: balance;

  display: flex;
  align-items: center;
  border: solid thin black;
  border-radius: 0.1em;
  gap: 1em;
  padding: 0.5em 1em;
  color: var(--bg);
  background: var(--fg);
  border-color: var(--bg);

  &.selected {
    background: var(--bg);
    color: var(--fg);
  }
}

label.radio-selector {
  justify-content: center;

  input {
    display: none;
  }
}

.line-buttons {
  display: flex;
  gap: 0.5em;

  & > * {
    flex-grow: 1;
  }
}

textarea {
  resize: vertical;
  min-height: 15vh;
}

#module-feedback .disabled {
  display: none;
}

#done {
  display: flex;
  align-items: center;
}