:root {
  --mojo-ember: #ffa01e;
  --mojo-nebula: #4057d8;
  --mojo-teal: #087a58;
  --mojo-plum: #7c3f82;

  --mojo-surface-soft: #eef1f5;
  --mojo-code-bg: #eef1f5;
  --mojo-code-border: #c6ced8;
  --mojo-text-soft: #3f5265;

  --mojo-font-body:
    "Inter",
    system-ui,
    -apple-system,
    BlinkMacSystemFont,
    "Segoe UI",
    sans-serif;

  --mojo-font-code:
    "Roboto Mono",
    "SFMono-Regular",
    Consolas,
    monospace;
}

/* Simple light/dark toggle (replaces the stock multi-theme picker) */

.theme-toggle-icon-dark {
  display: none;
}

html.coal .theme-toggle-icon-light,
html.navy .theme-toggle-icon-light,
html.ayu .theme-toggle-icon-light {
  display: none;
}

html.coal .theme-toggle-icon-dark,
html.navy .theme-toggle-icon-dark,
html.ayu .theme-toggle-icon-dark {
  display: inline;
}

/* Dark themes */

html.coal,
html.navy,
html.ayu {
  --mojo-ember: #ffb02e;
  --mojo-nebula: #6fb6ff;
  --mojo-teal: #4de3b8;
  --mojo-plum: #d38cff;

  --mojo-surface-soft: #101923;
  --mojo-code-bg: #101923;
  --mojo-code-border: #2a3542;
  --mojo-text-soft: #aab7c4;
}

/* Typography */

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

html,
body {
  font-family: "Inter", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
  font-family: var(--mojo-font-body);

  -webkit-font-feature-settings: "salt" off;
  font-feature-settings: "salt" off;
  letter-spacing: -0.01em;
}

.content p,
.content li {
  line-height: 1.72;
}

/* Page title */

.content h1 {
  margin-top: 0.2em;
  margin-bottom: 1.6rem;
  line-height: 1.05;
}

.content h1 .header {
  display: inline-block;

  color: #ffa01e !important;
  color: var(--mojo-ember) !important;

  /* Fallback for browsers without clamp(). */
  font-size: 4rem;
  font-size: clamp(3rem, 6vw, 5.25rem);

  font-weight: 700;
  letter-spacing: -0.055em;
  line-height: 0.95;
  text-decoration: none !important;
}

.content h1 .header:hover {
  color: #4057d8 !important;
  color: var(--mojo-nebula) !important;
}

/* Major section headings */

.content h2 {
  margin-top: 4rem;
  margin-bottom: 1.4rem;
  padding-bottom: 0.35rem;

  border-bottom: 1px solid #c6ced8;
  border-bottom-color: var(--mojo-code-border);
  letter-spacing: -0.03em;
}

.content h2 .header {
  color: inherit !important;
  color: var(--fg) !important;

  /* Fallback for browsers without clamp(). */
  font-size: 2.3rem;
  font-size: clamp(2rem, 3vw, 2.6rem);

  font-weight: 600;
  line-height: 1.08;
  text-decoration: none !important;
}

.content h2 .header:hover {
  color: #ffa01e !important;
  color: var(--mojo-ember) !important;
}

/* Subsection headings */

.content h3 {
  margin-top: 2.8rem;
  margin-bottom: 0.9rem;
}

.content h3 .header {
  color: inherit !important;
  color: var(--fg) !important;
  font-size: 2rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.2;
  text-decoration: none !important;
}

.content h3 .header:hover {
  color: #4057d8 !important;
  color: var(--mojo-nebula) !important;
}

.content h4 .header {
  color: inherit !important;
  color: var(--fg) !important;
  text-decoration: none;
}

.content h4 .header:hover {
  color: #ffa01e !important;
  color: var(--mojo-ember) !important;
}

/* Links */

.content a {
  color: #ffa01e;
  color: var(--mojo-ember);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.16em;
}

.content a:hover {
  color: #4057d8;
  color: var(--mojo-nebula);
}

/* Strong text */

.content strong,
.content b {
  color: inherit;
  color: var(--fg);
  font-weight: 700;
}

.content p strong,
.content li strong {
  letter-spacing: -0.01em;
}

.content strong code {
  color: #ffa01e;
  color: var(--mojo-ember);
}

/* Inline code */

.content :not(pre) > code {
  padding: 0.08em 0.28em;

  color: #ffa01e;
  color: var(--mojo-ember);
  background: #eef1f5;
  background: var(--mojo-code-bg);
  border: 1px solid #c6ced8;
  border-color: var(--mojo-code-border);
  border-radius: 2px;

  font-family: "Roboto Mono", "SFMono-Regular", Consolas, monospace;
  font-family: var(--mojo-font-code);
  font-size: 0.9em;
}

/* Code blocks */

pre {
  padding: 1rem;

  background: #eef1f5 !important;
  background: var(--mojo-code-bg) !important;
  border: 1px solid #c6ced8;
  border-color: var(--mojo-code-border);
  border-radius: 2px;
}

pre code {
  font-family: "Roboto Mono", "SFMono-Regular", Consolas, monospace;
  font-family: var(--mojo-font-code);
  font-size: 0.92em;
  line-height: 1.6;
}

/* Callouts */

.content blockquote,
.mojo-callout {
  margin: 1.5rem 0;
  padding: 0.9rem 1rem;

  background: #eef1f5;
  background: var(--mojo-surface-soft);
  border-left: 2px solid #ffa01e;
  border-left-color: var(--mojo-ember);
}

/* Advent divider */

.mojo-divider {
  margin: 3rem auto;

  color: #087a58;
  color: var(--mojo-nebula);
  letter-spacing: 0.12em;
  text-align: center;
}

.mojo-divider strong {
  color: #ffa01e;
  color: var(--mojo-ember);
}

/* Illustrated chapter introduction */

.intro {
  display: -webkit-box;
  display: -webkit-flex;
  display: flex;

  -webkit-box-align: start;
  -webkit-align-items: flex-start;
  align-items: flex-start;

  margin-bottom: 2.5rem;
}


/* Illustrated chapter outro */

.outro {
  display: -webkit-box;
  display: -webkit-flex;
  display: flex;

  -webkit-box-align: start;
  -webkit-align-items: flex-start;
  align-items: flex-start;

  margin-bottom: 2.5rem;
}

/*
 * Fallback spacing for older Safari versions that support flexbox but not
 * flex gap. Browsers that support gap remove this margin below.
 */
.intro > * + * {
  margin-left: 2rem;
}

.outro > * + * {
  margin-left: 2rem;
}

@supports (gap: 1rem) {
  .intro {
    gap: 2rem;
  }

  .intro > * + * {
    margin-left: 0;
  }

  .outro {
    gap: 2rem;
  }

  .outro > * + * {
    margin-left: 0;
  }
}

.intro-text {
  -webkit-box-flex: 1;
  -webkit-flex: 1 1 0;
  flex: 1 1 0;
  min-width: 0;
}

.intro-image {
  display: block;

  -webkit-box-flex: 0;
  -webkit-flex: 0 0 42%;
  flex: 0 0 42%;

  max-width: 340px;
}

.intro-image img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 8px;
}

.outro-text {
  -webkit-box-flex: 1;
  -webkit-flex: 1 1 0;
  flex: 1 1 0;
  min-width: 0;
}

.outro-image {
  display: block;

  -webkit-box-flex: 0;
  -webkit-flex: 0 0 42%;
  flex: 0 0 42%;

  max-width: 340px;
}

.outro-image img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 8px;
}

/* Swap the chapter-intro illustration with the light/dark toggle */

.intro-image .intro-image-dark {
  display: none;
}

.outro-image .outro-image-dark {
  display: none;
}

html.coal .intro-image-light,
html.navy .intro-image-light,
html.ayu .intro-image-light {
  display: none;
}

html.coal .intro-image-dark,
html.navy .intro-image-dark,
html.ayu .intro-image-dark {
  display: block;
}

html.coal .outro-image-light,
html.navy .outro-image-light,
html.ayu .outro-image-light {
  display: none;
}

html.coal .outro-image-dark,
html.navy .outro-image-dark,
html.ayu .outro-image-dark {
  display: block;
}

/* Stack the introduction on narrow screens */

@media (max-width: 700px) {
  .intro {
    display: block;
  }

  .intro > * + * {
    margin-left: 0;
  }

  .intro-image {
    width: 100%;
    max-width: 420px;
    margin: 1.5rem auto 0;
  }
}

/* Stack the outro on narrow screens */

@media (max-width: 700px) {
  .outro {
    display: block;
  }

  .outro > * + * {
    margin-left: 0;
  }

  .outro-image {
    width: 100%;
    max-width: 420px;
    margin: 1.5rem auto 0;
  }
}

/* Book cover */

/* The cover sits outside .intro-image, so it needs its own default-hide.
   html.coal/navy/ayu above are unscoped and still do the swap. */
.mojo-cover.intro-image-dark {
  display: none;
}

.mojo-cover {
  display: block;
  width: auto;
  max-width: 100%;

  /* vh is the fallback; newer browsers replace it with dvh. */
  max-height: 70vh;
  max-height: 70dvh;

  height: auto;
  margin: 0 auto 2rem;
}

/* Sidebar typography */

.sidebar {
  font-size: 1.3rem;
  line-height: 1.6;
}

/* Sidebar */

.sidebar {
  border-right-color: var(--mojo-code-border);
}

.sidebar .chapter li a {
  color: var(--fg);
}

.sidebar .chapter li a:hover {
  color: #c86a00;
}

.sidebar .chapter li a.active {
  margin-left: -0.75rem;
  padding-left: calc(0.75rem - 3px);

  color: var(--mojo-nebula);
  border-left: 3px solid var(--mojo-nebula);
  font-weight: 600;
}

.sidebar .chapter li.part-title {
  color: var(--mojo-text-soft);
}

.sidebar .chapter li a .toggle {
  color: #c86a00;
}

/* Dark-theme sidebar */

html.coal .sidebar .chapter li a:hover,
html.navy .sidebar .chapter li a:hover,
html.ayu .sidebar .chapter li a:hover {
  color: var(--mojo-ember);
}

.sidebar .chapter li a.active {
  margin-left: -0.75rem;
  padding-left: calc(0.75rem - 3px);

  color: var(--mojo-nebula);
  border-left: 3px solid var(--mojo-nebula);
  font-weight: 600;
}

html.coal .sidebar .chapter li a .toggle,
html.navy .sidebar .chapter li a .toggle,
html.ayu .sidebar .chapter li a .toggle {
  color: var(--mojo-ember);
}