/* One stylesheet for every page.
 *
 * The look is deliberately plain. This is a tool a teacher opens on a Tuesday to find
 * out how to restore a backup, not a product page, so it reads like a page of writing
 * with a navigation bar above it. The colours follow whatever the reader's computer is
 * set to rather than insisting on a light page at night. */

:root {
  color-scheme: light dark;
  --ink: #1a1a1a;
  --quiet: #5a5a5a;
  --page: #ffffff;
  --edge: #d8d8d8;
  --raised: #f4f4f4;
  --link: #0b57d0;
  --measure: 38rem;
}

@media (prefers-color-scheme: dark) {
  :root {
    --ink: #eaeaea;
    --quiet: #a8a8a8;
    --page: #17181a;
    --edge: #34363a;
    --raised: #212327;
    --link: #8ab4f8;
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--page);
  color: var(--ink);
  font:
    1rem/1.65
    system-ui,
    -apple-system,
    'Segoe UI',
    sans-serif;
}

.skip {
  position: absolute;
  left: -100vw;
}
.skip:focus {
  left: 0.5rem;
  top: 0.5rem;
  background: var(--page);
  padding: 0.5rem 0.75rem;
  border: 1px solid var(--edge);
  z-index: 2;
}

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

header {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem 1.25rem;
  padding: 0.9rem 1.5rem;
  border-bottom: 1px solid var(--edge);
  background: var(--raised);
}

.wordmark {
  font-weight: 600;
  font-size: 1.05rem;
  color: var(--ink);
  text-decoration: none;
}

header nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0 1rem;
  flex: 1;
}

header nav a {
  color: var(--quiet);
  text-decoration: none;
  padding: 0.15rem 0;
  border-bottom: 2px solid transparent;
}

header nav a:hover,
header nav a[aria-current='page'] {
  color: var(--ink);
  border-bottom-color: var(--link);
}

.open-app {
  border: 1px solid var(--link);
  border-radius: 4px;
  padding: 0.35rem 0.8rem;
  text-decoration: none;
  white-space: nowrap;
}

main {
  max-width: var(--measure);
  margin: 0 auto;
  padding: 2.5rem 1.5rem 4rem;
}

h1 {
  font-size: 1.75rem;
  line-height: 1.25;
  margin: 0 0 1.5rem;
}

h2 {
  font-size: 1.2rem;
  margin: 2.5rem 0 0.75rem;
}

h3 {
  font-size: 1.02rem;
  margin: 1.75rem 0 0.5rem;
}

p,
li {
  /* The prose is written one sentence per line, which markdown joins back into
   * paragraphs. Nothing here should undo that. */
  max-width: var(--measure);
}

code {
  background: var(--raised);
  border: 1px solid var(--edge);
  border-radius: 3px;
  padding: 0.05rem 0.3rem;
  font-size: 0.9em;
}

pre {
  background: var(--raised);
  border: 1px solid var(--edge);
  border-radius: 4px;
  padding: 0.9rem 1rem;
  overflow-x: auto;
}

pre code {
  background: none;
  border: 0;
  padding: 0;
}

blockquote {
  margin: 1.5rem 0;
  padding: 0.1rem 0 0.1rem 1rem;
  border-left: 3px solid var(--edge);
  color: var(--quiet);
}

table {
  border-collapse: collapse;
  width: 100%;
  margin: 1.5rem 0;
  display: block;
  overflow-x: auto;
}

th,
td {
  border: 1px solid var(--edge);
  padding: 0.6rem 0.75rem;
  text-align: left;
  vertical-align: top;
}

caption {
  text-align: left;
  color: var(--quiet);
  padding-bottom: 0.4rem;
}

.downloads th[scope='row'] {
  font-weight: 500;
  white-space: nowrap;
}

.download {
  font-weight: 500;
}

.note,
.notice {
  color: var(--quiet);
  font-size: 0.92rem;
}

.notice {
  border: 1px solid var(--edge);
  border-radius: 4px;
  background: var(--raised);
  padding: 0.8rem 1rem;
}

footer {
  border-top: 1px solid var(--edge);
  padding: 1.5rem;
  color: var(--quiet);
  font-size: 0.9rem;
}

footer nav {
  display: flex;
  gap: 1rem;
  margin-bottom: 0.5rem;
}

footer p {
  margin: 0;
}