/* Pan Sobao Studio LLC - site stylesheet. No external resources. */

:root {
  color-scheme: light dark;
  --bg: #ffffff;
  --fg: #1a1a1a;
  --muted: #555555;
  --link: #0b57d0;
  --border: #d9d9d9;
  --surface: #f5f5f5;
  --review-bg: #fff3bf;
  --review-fg: #3d2c00;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #121212;
    --fg: #e8e8e8;
    --muted: #b0b0b0;
    --link: #8ab4f8;
    --border: #3a3a3a;
    --surface: #1e1e1e;
    --review-bg: #4a3b00;
    --review-fg: #ffe9a8;
  }
}

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

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 1.0625rem;
  line-height: 1.6;
  overflow-wrap: break-word;
}

.wrap {
  max-width: 44rem;
  margin: 0 auto;
  padding: 0 1.25rem;
}

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

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

.skip-link {
  position: absolute;
  left: -999rem;
  top: 0;
  padding: 0.5rem 1rem;
  background: var(--bg);
  color: var(--link);
  border: 2px solid var(--link);
  z-index: 10;
}

.skip-link:focus {
  left: 0.5rem;
  top: 0.5rem;
}

/* Header and footer */

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

.site-header .wrap {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.25rem 1.5rem;
  padding-top: 1rem;
  padding-bottom: 1rem;
}

.brand {
  color: var(--fg);
  font-weight: 700;
  text-decoration: none;
}

nav ul {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem 1.25rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

nav a[aria-current="page"] {
  color: var(--fg);
  font-weight: 600;
}

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

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

.site-footer p {
  margin: 0 0 0.5rem;
}

/* Content */

main {
  padding-top: 2rem;
}

h1,
h2,
h3,
h4 {
  line-height: 1.25;
  margin: 2em 0 0.5em;
}

h1 {
  font-size: 2rem;
  margin-top: 0.5em;
}

h2 {
  font-size: 1.4rem;
  padding-top: 0.75em;
  border-top: 1px solid var(--border);
}

h3 {
  font-size: 1.15rem;
}

h4 {
  font-size: 1rem;
}

p,
ul,
ol,
dl {
  margin: 0 0 1em;
}

li {
  margin-bottom: 0.35em;
}

.lead {
  font-size: 1.2rem;
}

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

.app-list {
  padding: 0;
  list-style: none;
}

.app-list li {
  padding: 1rem 1.25rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 0.5rem;
}

.app-list h3 {
  margin: 0 0 0.25em;
}

.app-list p {
  margin: 0;
}

.toc {
  padding: 1rem 1.25rem 1rem 2.5rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 0.5rem;
}

.toc ol {
  margin: 0.35em 0 0;
  padding-left: 1.25rem;
}

/* Unresolved items. Every .review element must be resolved before publishing. */
mark.review {
  padding: 0.1em 0.3em;
  background: var(--review-bg);
  color: var(--review-fg);
  border-radius: 0.2em;
  font-size: 0.9em;
}

@media (max-width: 30rem) {
  body {
    font-size: 1rem;
  }

  h1 {
    font-size: 1.6rem;
  }

  h2 {
    font-size: 1.25rem;
  }
}

@media print {
  .site-header nav,
  .skip-link {
    display: none;
  }
}