:root {
  --h-brand:         165;
  --clr-brand:       oklch(0.63 0.22 var(--h-brand));

  --color-primary:   oklch(0.45 0.20 var(--h-brand));
  --color-visited:   oklch(0.34 0.12 var(--h-brand));
  --color-text:      oklch(0.28 0.03 var(--h-brand));
  --color-white:     #fff;
  --color-error:     var(--clr-brand);

  --color-header-bg: oklch(0.48 0.16 var(--h-brand));
  --color-header-fg: var(--color-white);
  --color-surface:   oklch(0.985 0.002 var(--h-brand));
  --color-card:      oklch(0.955 0.004 var(--h-brand));
  --color-muted:     oklch(0.86 0.008 var(--h-brand));
  --color-active:    oklch(0.90 0.012 var(--h-brand));

  --radius-card:     0.5rem;
  --shadow-card:     none;
  --app-header-height: 7.1rem;
  --app-toggler-height: 3.25rem;
}

* {
  font-family:
    system-ui,
    OpenDyslexic,
    Dyslexie,
    Readable,
    Verdana,
    Helvetica,
    Arial,
    sans-serif;
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  overflow: -moz-scrollbars-vertical;
  overflow-y: scroll;
}

body {
  line-height: 1.2em;
  font-size: 1em;
  background-color: var(--color-surface);
  min-height: 100dvh;
}

strong {
  font-size: 1em;
}

hr {
  margin-top: 1em;
  border-color: var(--color-text);
  border-width: 0 0 1px 0;
}

h1, h2, h3, h4, strong {
  color: var(--color-text);
}

a {
  text-decoration: none;
  color: var(--color-primary);
  outline: 0;
}

a:hover {
  text-decoration: underline;
}

a:visited {
  color: var(--color-visited);
}

main h1 {
  font-size: 1.3em;
}

main h2 {
  font-size: 1.1em;
}

main h3 {
  font-size: 1em;
}

main > * {
  padding-left: 1rem;
  padding-right: 1rem;
}

main p {
  text-align: justify;
  margin-bottom: 1rem;
}

main > header {
  position: sticky;
  top: 0;
  z-index: 10;
  min-height: var(--app-header-height);
  background-color: var(--color-header-bg);
  padding: 1rem;
  margin-bottom: 1.5rem;
}

main > header > h1 {
  color: var(--color-header-fg);
  margin: 0;
  padding: 0;
}

.txt-xxl  { font-size: 1.4em; }
.txt-xl  { font-size: 1.2em; }
.txt-l   { font-size: 1.1em; }
.txt-s   { font-size: 0.9em; }
.txt-xs  { font-size: 0.8em; }
.txt-xxs  { font-size: 0.65em; }


.txt-bold   { font-weight: bold; }
.txt-normal   { font-weight: normal; }
.txt-italic { font-style: italic; }


.error {
  color: var(--color-error);
}

.card {
  background-color: var(--color-card);
  border: 1px solid var(--color-muted);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  margin: 0 1rem 1rem 1rem;
  overflow: hidden;
}

@media (max-width: 40rem) {
  .card {
    margin-right: 0;
    margin-left: 0;
    border-radius: 0;
  }

  .card > * {
    padding-right: 0;
    padding-left: 0;
  }

  main > .card-toggler:not([data-collapsed]) {
    position: sticky;
    top: var(--app-header-height);
    z-index: 9;
  }
}

[data-toggle-target] {
  display: grid !important;
  grid-template-rows: minmax(0, 1fr);
  transition: grid-template-rows 0.3s ease;
  overflow: hidden;
}

[data-toggle-target][hidden] {
  grid-template-rows: minmax(0, 0fr);
  border-width: 0;
}

[data-toggle-target] > * {
  min-height: 0;
  overflow: hidden;
}