/* The Cairn Notes website. The colors are the app's own: Limestone for light
   and Slate for dark (app/src/app.css), following the system's choice. The
   fonts are the app's system font stacks. */

:root {
  --font-ui: system-ui, -apple-system, "Segoe UI", Roboto, "Noto Sans", Ubuntu, Cantarell, sans-serif;
  --font-mono: ui-monospace, "SF Mono", "JetBrains Mono", "Cascadia Code", Menlo, Consolas, "DejaVu Sans Mono", monospace;

  --bg: #fbfaf7;
  --bg-side: #f3f1ec;
  --bg-code: #f0eee8;
  --border: #e2ded5;
  --border-strong: #878279;
  --text: #24292b;
  --text-muted: #5c6260;
  --accent: #a84529;
  --accent-soft: #f9ebe5;
  --accent-text: #ffffff;
  --link: #9e4026;

  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #1d2022;
    --bg-side: #181b1d;
    --bg-code: #262a2d;
    --border: #2f3438;
    --border-strong: #6f787e;
    --text: #dfe3e0;
    --text-muted: #9aa29e;
    --accent: #e5774f;
    --accent-soft: #3d2820;
    --accent-text: #1e100a;
    --link: #ee8c66;

    color-scheme: dark;
  }
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 1.0625rem/1.6 var(--font-ui);
  overflow-wrap: break-word;
}

img {
  max-width: 100%;
  height: auto;
}

a {
  color: var(--link);
  text-underline-offset: 0.15em;
}

a:hover {
  text-decoration-thickness: 2px;
}

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: 2px;
}

h1,
h2,
h3,
h4 {
  line-height: 1.25;
  font-weight: 650;
  margin: 2em 0 0.6em;
}

h1 {
  font-size: 2.1rem;
  margin-top: 0;
}

h2 {
  font-size: 1.45rem;
}

h3 {
  font-size: 1.15rem;
}

h4 {
  font-size: 1rem;
}

p,
ul,
ol,
pre,
table,
blockquote,
figure {
  margin: 0 0 1rem;
}

ul,
ol {
  padding-left: 1.5rem;
}

li + li {
  margin-top: 0.3rem;
}

code,
pre,
kbd {
  font-family: var(--font-mono);
  font-size: 0.875em;
}

:not(pre) > code {
  background: var(--bg-code);
  border-radius: 4px;
  padding: 0.1em 0.3em;
  overflow-wrap: anywhere;
}

pre {
  background: var(--bg-code);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.8rem 1rem;
  overflow-x: auto;
  line-height: 1.5;
}

table {
  border-collapse: collapse;
  display: block;
  overflow-x: auto;
}

th,
td {
  border: 1px solid var(--border);
  padding: 0.4rem 0.7rem;
  text-align: left;
  vertical-align: top;
}

th {
  background: var(--bg-side);
}

blockquote {
  border-left: 3px solid var(--border-strong);
  padding-left: 1rem;
  color: var(--text-muted);
}

hr {
  border: 0;
  border-top: 1px solid var(--border);
  margin: 2rem 0;
}

/* Skip link: off screen until it has focus. */
.skip {
  position: absolute;
  left: 1rem;
  top: -10rem;
  background: var(--accent);
  color: var(--accent-text);
  padding: 0.5rem 1rem;
  border-radius: 0 0 6px 6px;
  z-index: 1;
}

.skip:focus {
  top: 0;
}

/* Header and footer */

.bar {
  max-width: 72rem;
  margin: 0 auto;
  padding: 0.75rem 1rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem 2rem;
}

.site-header {
  border-bottom: 1px solid var(--border);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  color: var(--text);
  font-weight: 650;
  font-size: 1.15rem;
  text-decoration: none;
  min-height: 44px;
}

.brand img {
  display: block;
}

.site-nav ul,
.site-footer ul {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0 1.5rem;
  margin: 0;
  padding: 0;
}

.site-nav li + li,
.site-footer li + li {
  margin-top: 0;
}

.site-nav a {
  display: inline-block;
  color: var(--text);
  text-decoration: none;
  padding: 0.6rem 0 0.45rem;
  border-bottom: 2px solid transparent;
}

.site-nav a:hover {
  border-bottom-color: var(--border-strong);
}

.site-nav a[aria-current="page"] {
  border-bottom-color: var(--accent);
  font-weight: 650;
}

.site-footer {
  border-top: 1px solid var(--border);
  margin-top: 4rem;
  color: var(--text-muted);
  font-size: 0.9375rem;
}

.site-footer .bar {
  padding-top: 1.5rem;
  padding-bottom: 2rem;
}

.site-footer p {
  margin: 0;
  max-width: 40rem;
}

.site-footer a {
  color: var(--text-muted);
  display: inline-block;
  padding: 0.35rem 0;
}

/* Home and download pages */

.page {
  max-width: 72rem;
  margin: 0 auto;
  padding: 2.5rem 1rem 0;
}

.page > h1,
.page > p,
.page > section {
  max-width: 46rem;
}

.lede {
  font-size: 1.1875rem;
  color: var(--text);
}

.note {
  color: var(--text-muted);
  font-size: 0.9375rem;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin: 1.5rem 0;
}

.button {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0.55rem 1.1rem;
  border: 1px solid var(--border-strong);
  border-radius: 7px;
  color: var(--text);
  font-weight: 600;
  text-decoration: none;
}

.button:hover {
  background: var(--bg-side);
}

.button.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--accent-text);
}

.button.primary:hover {
  background: var(--accent);
  text-decoration: underline;
}

.home .intro {
  max-width: 46rem;
}

.home .intro h1 {
  font-size: 2.5rem;
}

.shot {
  margin: 2.5rem 0 1rem;
}

.shot img,
.phone img {
  display: block;
  border: 1px solid var(--border);
  border-radius: 8px;
}

.features {
  list-style: none;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(16rem, 1fr));
  gap: 1.5rem 2.5rem;
}

.features li {
  margin: 0;
  border-top: 1px solid var(--border);
  padding-top: 1rem;
}

.features h3 {
  margin: 0 0 0.4rem;
  font-size: 1.0625rem;
}

.features p {
  margin: 0;
  color: var(--text-muted);
}

.home > section {
  max-width: none;
}

.platforms {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 16rem);
  gap: 2rem 3rem;
  align-items: start;
}

.platforms figure {
  margin: 2rem 0 0;
}

@media (max-width: 40rem) {
  .home .intro h1 {
    font-size: 2rem;
  }

  .platforms {
    grid-template-columns: minmax(0, 1fr);
  }

  .platforms figure {
    max-width: 16rem;
    margin-top: 0;
  }
}

/* The download page's file lists */

.files {
  list-style: none;
  padding: 0;
  border: 1px solid var(--border);
  border-radius: 8px;
}

.files li {
  margin: 0;
  padding: 0.8rem 1rem;
}

.files li + li {
  border-top: 1px solid var(--border);
}

.file-name {
  font-family: var(--font-mono);
  font-size: 0.9375rem;
  font-weight: 600;
  overflow-wrap: anywhere;
}

.file-meta {
  display: block;
  color: var(--text-muted);
  font-size: 0.9375rem;
}

.file-sum {
  display: block;
  font-size: 0.9375rem;
  color: var(--text-muted);
}

.file-sum code,
.fingerprint code {
  user-select: all;
  -webkit-user-select: all;
  color: var(--text);
}

.download h2 {
  margin-top: 2.5rem;
}

/* The manual */

.manual {
  max-width: 76rem;
  margin: 0 auto;
  padding: 2rem 1rem 0;
  display: grid;
  grid-template-columns: 15rem minmax(0, 1fr);
  gap: 3rem;
}

.manual-nav {
  position: sticky;
  top: 1rem;
  align-self: start;
  max-height: calc(100vh - 2rem);
  overflow-y: auto;
  font-size: 0.9375rem;
  padding-bottom: 1rem;
}

.manual-title {
  margin: 0 0 0.75rem;
  font-weight: 650;
}

.manual-title a {
  color: var(--text);
  text-decoration: none;
}

.manual-title span {
  display: block;
  font-weight: 400;
  color: var(--text-muted);
  font-size: 0.875rem;
}

.toc,
.toc ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.toc li {
  margin: 0;
}

.toc a {
  display: block;
  padding: 0.3rem 0.6rem;
  border-left: 2px solid var(--border);
  color: var(--text);
  text-decoration: none;
}

.toc a:hover {
  border-left-color: var(--border-strong);
  text-decoration: underline;
}

.toc a[aria-current="page"] {
  border-left-color: var(--accent);
  background: var(--accent-soft);
  font-weight: 650;
}

.toc ul a {
  padding-left: 1.4rem;
  color: var(--text-muted);
  font-size: 0.875rem;
}

.manual-toc {
  display: none;
  border: 1px solid var(--border);
  border-radius: 8px;
  margin-bottom: 1.5rem;
}

.manual-toc summary {
  cursor: pointer;
  padding: 0.7rem 1rem;
  font-weight: 650;
  min-height: 44px;
}

.manual-toc nav {
  padding: 0 1rem 1rem;
}

.prose {
  max-width: 44rem;
}

.prose h2 {
  border-bottom: 1px solid var(--border);
  padding-bottom: 0.3rem;
}

.prose img {
  display: block;
  border: 1px solid var(--border);
  border-radius: 8px;
}

.prose img.portrait {
  max-width: 16rem;
}

.prose li > p {
  margin-bottom: 0.4rem;
}

.finding {
  color: var(--text-muted);
  font-size: 0.8125rem;
}

.pager {
  max-width: 44rem;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-top: 3rem;
}

.pager a {
  display: block;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.7rem 1rem;
  text-decoration: none;
}

.pager a:hover {
  border-color: var(--border-strong);
}

.pager span {
  display: block;
  color: var(--text-muted);
  font-size: 0.8125rem;
}

.pager .next {
  grid-column: 2;
  text-align: right;
}

.source {
  max-width: 44rem;
  margin-top: 2rem;
  color: var(--text-muted);
  font-size: 0.875rem;
}

.source a {
  color: var(--text-muted);
}

@media (max-width: 56rem) {
  .manual {
    grid-template-columns: minmax(0, 1fr);
    gap: 0;
    padding-top: 1.25rem;
  }

  .manual-nav {
    display: none;
  }

  .manual-toc {
    display: block;
  }

  h1 {
    font-size: 1.8rem;
  }
}

@media (max-width: 30rem) {
  .pager {
    grid-template-columns: minmax(0, 1fr);
  }

  .pager .next {
    grid-column: 1;
  }
}