/* Shared colors. Dark appearance overrides these tokens below. */
:root {
  color-scheme:light dark;
  --bg:#fff;
  --panel:#f7f8fa;
  --text:#20232a;
  --muted:#626a76;
  --line:#e2e5e9;
  --link:#0065c8;
  --code:#f3f5f7;
  --blue:#0065c8;
  --green:#21713b;
  --red:#b52d38;
  --amber:#875700;
  --purple:#7455a8
}


* {
  box-sizing:border-box
}

html {
  scroll-padding-top:6rem
}

body {
  margin:0;
  background:var(--bg);
  color:var(--text);
  font:16px/1.65 -apple-system,BlinkMacSystemFont,"SF Pro Text","Helvetica Neue",Arial,sans-serif
}

a {
  color:var(--link);
  text-underline-offset:.2em
}

a:hover {
  text-decoration:underline
}

a:focus-visible,input:focus-visible,summary:focus-visible,button:focus-visible {
  outline:3px solid var(--link);
  outline-offset:4px
}

button,input {
  font:inherit
}

.skip {
  position:fixed;
  left:1rem;
  top:-8rem;
  z-index:10;
  background:var(--bg);
  padding:.8rem
}

.skip:focus {
  top:1rem
}

.site-header {
  min-height:76px;
  display:flex;
  align-items:center;
  gap:3rem;
  padding:1rem 3rem;
  border-bottom:1px solid var(--line);
  background:var(--bg)
}

.brand {
  font-size:1.4rem;
  font-weight:750;
  letter-spacing:-.06em;
  color:var(--text);
  text-decoration:none;
  white-space:nowrap
}

.brand span {
  color:var(--link)
}

.site-header nav {
  display:flex;
  gap:1.8rem
}

.site-header nav a,.search-link {
  font-size:.9rem;
  text-decoration:none;
  color:var(--muted)
}

.site-header nav a[aria-current] {
  color:var(--link);
  font-weight:650
}

.search-link {
  margin-left:auto
}

.workspace {
  display:grid;
  grid-template-columns:238px minmax(0,1fr);
  max-width:1440px;
  min-height:calc(100vh - 150px);
  margin:auto
}

.sidebar {
  padding:2.5rem 1.6rem 2rem 2.5rem;
  border-right:1px solid var(--line);
  background:var(--panel)
}

.sidebar details {
  position:sticky;
  top:2rem
}

.sidebar summary {
  font-size:.8rem;
  font-weight:650;
  color:var(--muted);
  cursor:pointer;
  margin-bottom:1rem
}

.sidebar nav a {
  display:block;
  text-decoration:none;
  color:var(--muted);
  font-size:.9rem;
  padding:.35rem 0
}

.sidebar nav a:hover {
  color:var(--link)
}

.sidebar-group {
  margin-top:1.5rem
}

.sidebar nav .group-title {
  font-weight:650;
  color:var(--text)
}

.sidebar nav .topic-link {
  padding-left:.8rem;
  display:flex;
  justify-content:space-between;
  gap:.5rem
}

.topic-link span {
  font-size:.8rem;
  color:var(--muted)
}

.sidebar-caption {
  font-size:.8rem;
  color:var(--muted);
  margin-top:3rem;
  line-height:1.6
}

main {
  min-width:0;
  width:100%;
  max-width:1050px;
  padding:3.5rem clamp(1.5rem,5vw,5rem) 5rem
}

.page-heading {
  margin-bottom:2rem
}

.eyebrow {
  font-size:.8rem;
  color:var(--muted);
  margin:0 0 1.2rem;
  font-weight:550
}

.eyebrow a {
  text-decoration:none
}

h1,h2,h3 {
  letter-spacing:-.035em;
  line-height:1.22;
  color:var(--text)
}

h1 {
  font-size:clamp(2.2rem,4vw,3rem);
  font-weight:700;
  margin:0 0 1rem
}

h2 {
  font-size:1.45rem;
  margin:2.5rem 0 1rem
}

h3 {
  font-size:1.15rem;
  margin-top:2rem
}

.lede {
  font-size:1.2rem;
  line-height:1.55;
  color:var(--muted);
  max-width:43rem;
  margin:0
}

.prose {
  max-width:52rem
}

.prose p,.prose>ul,.prose>ol {
  max-width:72ch
}

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

.prose li {
  margin:.3rem 0
}

.prose blockquote {
  margin:1.5rem 0;
  border-left:3px solid var(--line);
  padding-left:1.2rem;
  color:var(--muted)
}

.category-grid {
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:1rem;
  margin:2rem 0 3rem
}

.category-card {
  border:1px solid var(--line);
  border-radius:8px;
  padding:1.2rem;
  color:var(--text);
  text-decoration:none
}

.category-card:hover {
  background:var(--panel);
  text-decoration:none;
  border-color:var(--link)
}

.category-card h2 {
  display:flex;
  justify-content:space-between;
  font-size:1.12rem;
  margin:0 0 .8rem
}

.category-card h2 span {
  color:var(--muted)
}

.category-card p {
  font-size:.9rem;
  color:var(--muted);
  margin:0;
  line-height:1.5
}

.note-list {
  list-style:none;
  padding:0;
  margin:0!important;
  max-width:none!important
}

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

.note-list li:last-child {
  border-bottom:1px solid var(--line)
}

.note-list a {
  display:flex;
  justify-content:space-between;
  gap:1rem;
  font-weight:550;
  text-decoration:none
}

.note-list a:hover {
  text-decoration:underline
}

.note-list p {
  color:var(--muted);
  font-size:.9rem;
  margin:.3rem 0 0
}

.count {
  font-size:.8rem;
  font-weight:400;
  border:1px solid var(--line);
  border-radius:5px;
  padding:.1rem .4rem;
  vertical-align:middle;
  margin-left:.4rem;
  color:var(--muted)
}

.empty {
  padding:1rem 0;
  color:var(--muted)
}

code,kbd,pre {
  font-family:ui-monospace,"SFMono-Regular",Menlo,Monaco,Consolas,monospace
}

code {
  font-size:.88em;
  background:var(--code);
  border-radius:4px;
  padding:.15em .35em
}

pre {
  position:relative;
  padding:1.3rem;
  margin:1.5rem 0;
  background:var(--code);
  border:1px solid var(--line);
  border-radius:8px;
  overflow-x:auto;
  line-height:1.7;
  tab-size:4
}

pre code {
  padding:0;
  background:none;
  border:0;
  font-size:.875rem;
  border-radius:0
}

.highlight {
  max-width:100%;
  min-width:0
}

.highlight pre {
  margin:0
}

.highlighter-rouge {
  margin:1.5rem 0
}

.language-swift::before {
  content:"Swift";
  display:block;
  color:var(--muted);
  font:550 .8rem/1.6 -apple-system,BlinkMacSystemFont,sans-serif;
  margin-bottom:.5rem
}

.copy-code {
  display:block;
  margin:.5rem 0 0 auto;
  background:var(--bg);
  border:1px solid var(--line);
  border-radius:4px;
  padding:.25rem .6rem;
  color:var(--muted);
  font-size:.8rem;
  cursor:pointer
}

.highlight .k,.highlight .kd,.highlight .kn,.highlight .kp,.highlight .kr,.highlight .kt {
  color:#9b298d
}

.highlight .s,.highlight .s1,.highlight .s2,.highlight .se {
  color:#b52d38
}

.highlight .c,.highlight .c1,.highlight .cm,.highlight .cp {
  color:#626a76;
  font-style:italic
}

.highlight .mi,.highlight .mf,.highlight .m,.highlight .mh {
  color:#7655a8
}

.highlight .nc,.highlight .nb,.highlight .nf {
  color:#126c79
}

.note,.tip,.warning,.important,.mental-model,.common-mistake {
  --accent:var(--blue);
  border:1px solid var(--line);
  border-left:3px solid var(--accent);
  border-radius:6px;
  padding:1rem 1.2rem;
  margin:1.5rem 0;
  background:var(--panel)
}

.tip {
  --accent:var(--green)
}

.warning,.common-mistake {
  --accent:var(--red)
}

.important {
  --accent:var(--amber)
}

.mental-model {
  --accent:var(--purple)
}

:is(.note,.tip,.warning,.important,.mental-model,.common-mistake)>strong:first-child {
  color:var(--accent)
}

:is(.note,.tip,.warning,.important,.mental-model,.common-mistake)>:last-child {
  margin-bottom:0
}

.on-this-page {
  border-left:2px solid var(--line);
  padding-left:1rem;
  margin:0 0 2rem;
  font-size:.9rem
}

.on-this-page strong {
  display:block;
  margin-bottom:.5rem
}

.on-this-page a {
  display:block;
  padding:.15rem 0;
  text-decoration:none
}

.related {
  margin-top:3rem
}

.search-form label {
  display:block;
  margin-bottom:.5rem
}

.search-form input {
  width:100%;
  background:var(--bg);
  color:var(--text);
  border:1px solid var(--muted);
  border-radius:6px;
  padding:.8rem 1rem
}

#search-status {
  color:var(--muted);
  font-size:.9rem
}

.prose table {
  display:block;
  max-width:100%;
  overflow-x:auto;
  border-collapse:collapse
}

.prose th,.prose td {
  padding:.6rem 1rem;
  border:1px solid var(--line);
  text-align:left
}

footer {
  border-top:1px solid var(--line);
  padding:1.3rem 3rem;
  color:var(--muted);
  font-size:.8rem
}


@media(prefers-color-scheme:dark) {
  :root {
  --bg:#17191d;
  --panel:#1d2025;
  --text:#e8eaee;
  --muted:#a3abb8;
  --line:#343941;
  --link:#7cbaff;
  --code:#20242a;
  --blue:#7cbaff;
  --green:#81cc94;
  --red:#ff939c;
  --amber:#e9bf6e;
  --purple:#c3a6f4
}

.highlight .k,.highlight .kd,.highlight .kn,.highlight .kp,.highlight .kr,.highlight .kt {
  color:#ee99d5
}

.highlight .s,.highlight .s1,.highlight .s2,.highlight .se {
  color:#ff939c
}

.highlight .c,.highlight .c1,.highlight .cm,.highlight .cp {
  color:#a3abb8
}

.highlight .mi,.highlight .mf,.highlight .m,.highlight .mh {
  color:#c3a6f4
}

.highlight .nc,.highlight .nb,.highlight .nf {
  color:#80cdd6
}


}


@media(max-width:1000px) {
  .site-header {
  padding:1rem 1.5rem;
  gap:2rem
}

.workspace {
  grid-template-columns:205px minmax(0,1fr)
}

.sidebar {
  padding-left:1.5rem
}

.category-grid {
  grid-template-columns:1fr
}

.category-card {
  padding:1rem
}

.category-card h2 {
  margin-bottom:.3rem
}


}


@media(max-width:700px) {
  .site-header {
  gap:1rem;
  flex-wrap:wrap;
  padding:1rem 1.25rem
}

.site-header nav {
  order:3;
  width:100%;
  gap:1.5rem;
  overflow-x:auto
}

.search-link {
  font-size:.85rem
}

.workspace {
  display:block
}

.sidebar {
  padding:.8rem 1.25rem;
  border-right:0;
  border-bottom:1px solid var(--line)
}

.sidebar details {
  position:static
}

.sidebar summary {
  margin:0
}

.sidebar details[open] summary {
  margin-bottom:1rem
}

.sidebar-caption {
  display:none
}

.sidebar-group {
  margin-top:.7rem
}

main {
  padding:2rem 1.25rem 3rem
}

.lede {
  font-size:1.1rem
}

.category-grid {
  margin:1.5rem 0 2rem
}

footer {
  padding:1rem 1.25rem
}

h1 {
  overflow-wrap:anywhere
}


}