/* The Reference page. Same ink, filament yellow and type as the playground. */
:root {
  --paper: #ffffff;
  --well: #f3f4f6;
  --ink: #1f2833;
  --ink-soft: #66707c;
  --hairline: rgba(31, 40, 51, 0.1);
  --filament: #f2c14e;
  --filament-wash: rgba(242, 193, 78, 0.22);
  --ui: 'Instrument Sans', ui-sans-serif, system-ui, sans-serif;
  --mono: 'JetBrains Mono', ui-monospace, 'SF Mono', Menlo, monospace;
  --index-width: 232px;
  font: 16px/1.6 var(--ui);
  color: var(--ink);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--paper);
}

a {
  color: inherit;
}

code,
pre,
kbd {
  font-family: var(--mono);
  font-variant-ligatures: none;
}

:focus-visible {
  outline: 2px solid var(--filament);
  outline-offset: 2px;
  border-radius: 4px;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip-path: inset(50%);
}

[hidden] {
  display: none !important;
}

/* --- Bar ---------------------------------------------------------------------- */

.bar {
  position: sticky;
  top: 0;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  height: 60px;
  padding: 0 24px;
  background: rgba(255, 255, 255, 0.86);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--hairline);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-weight: 600;
  font-size: 17px;
  letter-spacing: -0.01em;
  text-decoration: none;
}

.bar nav {
  display: flex;
  gap: 20px;
}

.bar nav a {
  color: var(--ink-soft);
  text-decoration: none;
}

.bar nav a:hover,
.bar nav a[aria-current] {
  color: var(--ink);
}

.bar nav a[aria-current] {
  box-shadow: inset 0 -2px var(--filament);
}

/* --- Layout ------------------------------------------------------------------- */

.layout {
  display: grid;
  grid-template-columns: var(--index-width) minmax(0, 1fr);
  max-width: 1120px;
  margin: 0 auto;
}

.index {
  position: sticky;
  top: 60px;
  align-self: start;
  max-height: calc(100vh - 60px);
  overflow-y: auto;
  padding: 24px 16px 40px 24px;
  font-size: 14px;
}

.find {
  position: relative;
  display: block;
  margin-bottom: 18px;
}

.find input {
  width: 100%;
  height: 36px;
  padding: 0 32px 0 12px;
  background: var(--well);
  border: 1px solid transparent;
  border-radius: 8px;
  font: inherit;
  color: inherit;
}

.find input:focus {
  background: var(--paper);
  border-color: var(--filament);
  outline: none;
}

.find kbd {
  position: absolute;
  top: 50%;
  right: 10px;
  transform: translateY(-50%);
  padding: 0 6px;
  border: 1px solid var(--hairline);
  border-radius: 4px;
  font-size: 12px;
  color: var(--ink-soft);
}

.find input:focus + kbd {
  display: none;
}

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

.index .group {
  display: block;
  margin-top: 14px;
  font-weight: 600;
  text-decoration: none;
}

.index ul ul a {
  display: block;
  padding: 1px 0 1px 10px;
  border-left: 1px solid var(--hairline);
  font-family: var(--mono);
  font-size: 13px;
  color: var(--ink-soft);
  text-decoration: none;
}

.index ul ul a:hover {
  color: var(--ink);
  border-left-color: var(--filament);
}

.body {
  min-width: 0;
  padding: 32px 24px 96px 40px;
}

/* --- Prose -------------------------------------------------------------------- */

h1 {
  margin: 0 0 12px;
  font-size: 44px;
  font-weight: 600;
  line-height: 1.1;
  letter-spacing: -0.025em;
}

.lead {
  max-width: 64ch;
  margin: 0 0 24px;
  font-size: 18px;
  color: var(--ink-soft);
}

h2 {
  margin: 0 0 8px;
  padding-top: 48px;
  font-size: 26px;
  font-weight: 600;
  letter-spacing: -0.015em;
}

.intro {
  max-width: 68ch;
  margin: 0 0 8px;
  color: var(--ink-soft);
}

:not(pre) > code {
  padding: 1px 4px;
  background: var(--well);
  border-radius: 4px;
  font-size: 0.88em;
}

/* --- An entry ----------------------------------------------------------------- */

.entry {
  padding: 28px 0 4px;
  border-top: 1px solid var(--hairline);
  margin-top: 20px;
  scroll-margin-top: 72px;
}

.group > h2 + .entry,
.group > .intro + .entry {
  margin-top: 16px;
}

/* The signature is the page's one loud thing: big, monospaced, its parameters
   marked like filament laid along a path. */
.entry h3 {
  margin: 0 0 8px;
  font-size: 19px;
  font-weight: 500;
  line-height: 1.45;
}

.entry h3 .self {
  text-decoration: none;
}

.entry h3 code,
.entry h3 .returns {
  background: none;
  padding: 0;
  font-size: inherit;
}

.signature {
  overflow-wrap: anywhere;
}

.owner {
  margin-right: 1px;
  font-family: var(--mono);
  color: var(--ink-soft);
}

.returns {
  font-family: var(--mono);
  color: var(--ink-soft);
}

.arg {
  text-decoration: none;
  box-shadow: inset 0 -3px var(--filament);
  transition: background-color 0.12s ease;
}

.arg.lit,
.arg:hover {
  background: var(--filament-wash);
}

.entry:target h3 .signature {
  background: var(--filament-wash);
  box-shadow: 0 0 0 4px var(--filament-wash);
  border-radius: 2px;
}

.summary {
  max-width: 68ch;
  margin: 0 0 14px;
}

.params {
  margin: 0 0 14px;
}

.param {
  display: grid;
  grid-template-columns: minmax(150px, 34%) minmax(0, 1fr);
  gap: 4px 20px;
  padding: 9px 10px;
  margin: 0 -10px;
  border-radius: 6px;
  scroll-margin-top: 80px;
  transition: background-color 0.12s ease;
}

.param + .param {
  border-top: 1px solid var(--hairline);
}

.param.lit,
.param:target {
  background: var(--filament-wash);
}

.param dt {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 2px 8px;
  margin: 0;
  font-size: 14px;
}

.param dt code {
  padding: 0;
  background: none;
  font-size: 14px;
}

.param .name {
  font-weight: 500;
}

.param .type,
.param .default {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--ink-soft);
}

.param .name {
  flex-basis: 100%;
}

.param dd {
  margin: 0;
  max-width: 60ch;
  font-size: 15px;
}

.note {
  max-width: 68ch;
  margin: 0 0 12px;
  padding-left: 12px;
  border-left: 2px solid var(--filament);
  font-size: 15px;
  color: var(--ink-soft);
}

.example {
  margin: 0 0 12px;
  padding: 12px 14px;
  overflow-x: auto;
  background: var(--well);
  border-radius: 8px;
  font-size: 13.5px;
  line-height: 1.6;
}

.nothing {
  padding: 48px 0;
  color: var(--ink-soft);
}

/* --- Narrow screens: the index folds into a strip above the body ----------- */

@media (max-width: 820px) {
  .bar {
    padding: 0 16px;
  }
  .bar nav {
    gap: 12px;
    font-size: 14px;
  }
  .bar nav a[href*='github'],
  .bar nav a[href$='#skill'] {
    display: none;
  }
  .layout {
    grid-template-columns: 1fr;
  }
  .index {
    position: static;
    max-height: none;
    padding: 16px 16px 0;
  }
  #toc {
    display: flex;
    flex-wrap: wrap;
    gap: 6px 14px;
  }
  #toc ul {
    display: none;
  }
  .index .group {
    margin: 0;
    font-weight: 500;
    color: var(--ink-soft);
  }
  .body {
    padding: 8px 16px 64px;
  }
  h1 {
    font-size: 34px;
  }
  .entry h3 {
    font-size: 17px;
  }
  .param {
    grid-template-columns: 1fr;
  }
}

@media (prefers-reduced-motion: reduce) {
  * {
    transition: none !important;
  }
}