/* ==========================================================================
   Stygian - a modern docs theme for Jekyll & GitHub Pages
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. Design tokens
   -------------------------------------------------------------------------- */

:root,
html[data-theme='dark'] {
  color-scheme: dark;
  --color-bg: 0 0 0;
  --color-surface: 13 13 13;
  --color-card: 8 8 8;
  --color-border: 26 26 26;
  --color-border-hover: 68 68 68;
  --color-muted: 136 136 136;
  --color-muted-dark: 68 68 68;
  --color-fg: 255 255 255;
  --color-fg-dim: 204 204 204;
  --color-code: 5 5 5;
  --theme-nav: 0 0 0;
  --theme-glow: 255 255 255;
  --sidebar-width: 280px;
  --header-height: 60px;
  --content-max: 56rem;
}

html[data-theme='light'] {
  color-scheme: light;
  --color-bg: 246 247 249;
  --color-surface: 238 240 243;
  --color-card: 255 255 255;
  --color-border: 211 214 220;
  --color-border-hover: 107 114 128;
  --color-muted: 79 86 99;
  --color-muted-dark: 156 163 175;
  --color-fg: 17 24 39;
  --color-fg-dim: 55 65 81;
  --color-code: 246 248 250;
  --theme-nav: 246 247 249;
  --theme-glow: 17 24 39;
}

/* --------------------------------------------------------------------------
   2. Base
   -------------------------------------------------------------------------- */

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

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

html,
body {
  background: rgb(var(--color-bg));
  color: rgb(var(--color-fg));
}

body {
  margin: 0;
  font-family: 'Inter', system-ui, -apple-system, 'Segoe UI', sans-serif;
  font-size: 1rem;
  line-height: 1.65;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body,
main,
header,
nav,
article,
aside,
footer {
  transition:
    background-color 240ms ease,
    color 240ms ease,
    border-color 240ms ease;
}

h1, h2, h3, h4, h5, h6 { margin: 0; font-weight: 600; }
p { margin: 0; }
ul, ol { margin: 0; padding: 0; }
a { color: inherit; }
img, video, svg { display: block; max-width: 100%; }

::selection {
  background: rgb(var(--color-fg));
  color: rgb(var(--color-bg));
}

.mono, .mono-xs, code, pre, kbd, samp {
  font-family: 'Space Mono', ui-monospace, 'SF Mono', Menlo, monospace;
}
.mono-xs {
  font-size: 0.75rem;
  color: rgb(var(--color-muted));
}

.text-fg { color: rgb(var(--color-fg)); }
.text-muted { color: rgb(var(--color-muted)); }
.bg-bg { background-color: rgb(var(--color-bg)); }
.bg-surface { background-color: rgb(var(--color-surface)); }
.bg-card { background-color: rgb(var(--color-card)); }

a:focus-visible,
button:focus-visible {
  outline: 2px solid rgb(var(--color-fg) / 0.6);
  outline-offset: 2px;
}

.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: fixed;
  top: -100px; left: 1rem;
  z-index: 20000;
  background: rgb(var(--color-fg));
  color: rgb(var(--color-bg));
  padding: 0.5rem 1rem;
  font-family: 'Space Mono', monospace;
  font-size: 0.75rem;
  text-decoration: none;
  transition: top 200ms ease;
}
.skip-link:focus { top: 1rem; }

/* The View Transition is the color boundary: the new theme expands outward
   from the toggle while the old theme stays static ahead of the wave. */
html:active-view-transition body,
html:active-view-transition main,
html:active-view-transition header,
html:active-view-transition nav,
html:active-view-transition article,
html:active-view-transition aside,
html:active-view-transition footer {
  transition: none;
}

/* --------------------------------------------------------------------------
   3. Theme transition: circular reveal (no post-transition ripple)
   -------------------------------------------------------------------------- */

@keyframes theme-reveal-wave {
  0%   { clip-path: circle(0px at var(--theme-origin-x) var(--theme-origin-y)); }
  100% { clip-path: circle(var(--theme-reveal-radius) at var(--theme-origin-x) var(--theme-origin-y)); }
}

::view-transition-old(root),
::view-transition-new(root) {
  animation-duration: var(--theme-transition-duration, 700ms);
  animation-timing-function: cubic-bezier(0.22, 1, 0.36, 1);
  mix-blend-mode: normal;
}
::view-transition-old(root) { animation-name: none; }
::view-transition-new(root) { animation-name: theme-reveal-wave; }

/* --------------------------------------------------------------------------
   4. Header bar
   -------------------------------------------------------------------------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  background: rgb(var(--theme-nav) / 0.88);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgb(var(--color-border));
}
.site-header__inner {
  height: var(--header-height);
  max-width: 92rem;
  margin: 0 auto;
  padding: 0 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}
.site-header__left,
.site-header__right {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  min-width: 0;
}
.site-header__title {
  display: inline-flex;
  align-items: center;
  gap: 0.625rem;
  text-decoration: none;
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 600;
  font-size: 1.05rem;
  letter-spacing: -0.01em;
  white-space: nowrap;
}
.site-header__glyph {
  font-family: 'Space Mono', monospace;
  font-size: 0.625rem;
  font-weight: 700;
  line-height: 1;
  padding: 0.3rem 0.35rem;
  border: 1px solid rgb(var(--color-border-hover) / 0.6);
  border-radius: 0.375rem;
  color: rgb(var(--color-fg));
  background: rgb(var(--color-surface));
}

.aux-link {
  font-family: 'Space Mono', monospace;
  font-size: 0.75rem;
  color: rgb(var(--color-muted));
  text-decoration: none;
  white-space: nowrap;
}
.aux-link:hover { color: rgb(var(--color-fg)); }

.theme-toggle {
  display: grid;
  place-items: center;
  width: 2.25rem;
  height: 2.25rem;
  flex: none;
  border-radius: 9999px;
  border: 1px solid rgb(var(--color-border));
  background: rgb(var(--color-surface));
  color: rgb(var(--color-fg));
  cursor: pointer;
  transition: border-color 200ms ease;
}
.theme-toggle:hover { border-color: rgb(var(--color-border-hover)); }
.theme-toggle svg { width: 16px; height: 16px; }
.theme-toggle.animate-flicker-glow {
  animation: flicker-glow 7s infinite alternate;
}

.nav-toggle {
  display: none;
  place-items: center;
  width: 2.25rem;
  height: 2.25rem;
  border: 1px solid rgb(var(--color-border));
  border-radius: 0.375rem;
  background: transparent;
  color: rgb(var(--color-fg));
  cursor: pointer;
}

/* --------------------------------------------------------------------------
   5. Docs layout: sidebar + content
   -------------------------------------------------------------------------- */

.docs {
  display: grid;
  grid-template-columns: var(--sidebar-width) 1fr;
  max-width: 92rem;
  margin: 0 auto;
  min-height: calc(100vh - var(--header-height));
}

.docs__sidebar {
  position: sticky;
  top: var(--header-height);
  align-self: start;
  height: calc(100vh - var(--header-height));
  overflow-y: auto;
  padding: 1.25rem 1rem 3rem;
  border-right: 1px solid rgb(var(--color-border));
  scrollbar-width: thin;
  scrollbar-color: rgb(var(--color-muted-dark)) transparent;
}
.docs__sidebar-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 0.25rem 0.75rem;
}
.docs__sidebar-title {
  font-family: 'Space Mono', monospace;
  font-size: 0.6875rem;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: rgb(var(--color-muted));
}
.docs__close {
  display: none;
  background: none;
  border: 0;
  color: rgb(var(--color-muted));
  font-size: 1.25rem;
  cursor: pointer;
  padding: 0 0.25rem;
}
.docs__close:hover { color: rgb(var(--color-fg)); }

.docs__scrim {
  position: fixed;
  inset: 0;
  z-index: 55;
  background: rgb(var(--color-bg) / 0.6);
  backdrop-filter: blur(2px);
}

/* navigation list */
.docs__nav-list {
  list-style: none;
}
.docs__nav-list--child {
  margin: 0.15rem 0 0.4rem 0.9rem;
  padding-left: 0.85rem;
  border-left: 1px solid rgb(var(--color-border));
}
.docs__nav-list a {
  display: block;
  padding: 0.35rem 0.55rem;
  font-size: 0.875rem;
  color: rgb(var(--color-muted));
  text-decoration: none;
  border-radius: 0.375rem;
  transition: color 160ms ease, background-color 160ms ease;
}
.docs__nav-list a:hover {
  color: rgb(var(--color-fg));
  background: rgb(var(--color-surface));
}
.docs__nav-list li.active > a {
  color: rgb(var(--color-fg));
  background: rgb(var(--color-surface));
  border: 1px solid rgb(var(--color-border));
  border-left: 2px solid rgb(var(--color-fg));
  padding-left: calc(0.55rem - 1px);
}

/* content column */
.docs__content {
  min-width: 0;
  padding: 3rem 2rem 5rem;
}
@media (min-width: 1280px) {
  .docs__content { padding: 3.5rem 4rem 6rem; }
}
.docs__content article {
  max-width: var(--content-max);
}

.docs__title {
  margin-bottom: 2.5rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid rgb(var(--color-border));
}
.docs__title h1 {
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 600;
  font-size: clamp(1.75rem, 3vw, 2.4rem);
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: rgb(var(--color-fg));
}
.docs__title .lede {
  margin-top: 0.75rem;
  font-size: 1.0625rem;
  line-height: 1.7;
  color: rgb(var(--color-muted));
  max-width: 46rem;
}

/* mobile: sidebar becomes an off-canvas drawer */
@media (max-width: 1023px) {
  .docs { grid-template-columns: 1fr; }
  .nav-toggle { display: grid; }
  .docs__sidebar {
    position: fixed;
    top: 0;
    bottom: 0;
    left: 0;
    z-index: 70;
    width: min(19rem, 85vw);
    height: 100vh;
    margin: 0;
    background: rgb(var(--color-bg));
    transform: translateX(-105%);
    transition: transform 260ms cubic-bezier(0.22, 1, 0.36, 1);
    border-right: 1px solid rgb(var(--color-border));
    padding-top: calc(var(--header-height) * 0.4);
  }
  body.nav-open .docs__sidebar { transform: translateX(0); }
  body.nav-open { overflow: hidden; }
  .docs__close { display: block; }
}

/* --------------------------------------------------------------------------
   6. Page layout (no sidebar)
   -------------------------------------------------------------------------- */

.page-wrap {
  max-width: 48rem;
  margin: 0 auto;
  padding: 4rem 1.5rem 5rem;
}
@media (min-width: 768px) {
  .page-wrap { padding: 5rem 2rem 6rem; }
}
.page-head { margin-bottom: 2.5rem; }
.page-head h1 {
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 600;
  font-size: clamp(2rem, 4vw, 3rem);
  line-height: 1.15;
  letter-spacing: -0.015em;
  color: rgb(var(--color-fg));
}
.page-head .lede {
  margin-top: 1rem;
  font-size: 1.125rem;
  line-height: 1.7;
  color: rgb(var(--color-muted));
}
.label {
  display: inline-flex;
  border: 1px solid rgb(var(--color-border));
  padding: 0.375rem 0.75rem;
  margin-bottom: 1.5rem;
}
.label span {
  font-family: 'Space Mono', monospace;
  font-size: 0.6875rem;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: rgb(var(--color-muted));
}

/* --------------------------------------------------------------------------
   7. Buttons (landing / inline)
   -------------------------------------------------------------------------- */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  margin: 0.25rem 0.5rem 0.25rem 0;
  padding: 0.55rem 1.35rem;
  border-radius: 9999px;
  border: 1px solid rgb(var(--color-fg) / 0.2);
  background: rgb(var(--color-fg));
  color: rgb(var(--color-bg));
  font-family: 'Space Mono', monospace;
  font-size: 0.8125rem;
  text-decoration: none;
  transition: background-color 200ms ease, color 200ms ease, border-color 200ms ease;
}
.btn:hover { background: rgb(var(--color-fg) / 0.9); }
.btn--ghost {
  background: rgb(var(--color-fg) / 0.05);
  color: rgb(var(--color-fg));
}
.btn--ghost:hover {
  background: rgb(var(--color-fg));
  color: rgb(var(--color-bg));
}

/* Buttons sit inside .sty-prose, whose generic link rule (color = fg,
   underline) outranks the .btn class. Re-assert button colors here. */
.sty-prose a.btn,
.sty-prose a.btn--ghost {
  text-decoration: none;
}
.sty-prose a.btn {
  color: rgb(var(--color-bg));
}
.sty-prose a.btn:hover {
  color: rgb(var(--color-bg));
  background: rgb(var(--color-fg) / 0.9);
}
.sty-prose a.btn--ghost {
  color: rgb(var(--color-fg));
}
.sty-prose a.btn--ghost:hover {
  color: rgb(var(--color-bg));
  background: rgb(var(--color-fg));
}

/* --------------------------------------------------------------------------
   8. Flicker / glare effect suite
   -------------------------------------------------------------------------- */

@keyframes flicker-glow {
  0%, 19.999%, 22%, 62.999%, 64%, 64.999%, 70%, 100% {
    opacity: 0.99;
    border-color: rgb(var(--theme-glow) / 0.25);
    box-shadow: 0 0 4px rgb(var(--theme-glow) / 0);
  }
  20%, 21.999%, 63%, 63.999%, 65%, 69.999% {
    opacity: 0.85;
    border-color: rgb(var(--theme-glow) / 0.6);
    box-shadow: 0 0 16px rgb(var(--theme-glow) / 0.4);
  }
}

@keyframes glare-sweep {
  0%   { transform: skewX(-20deg) translateX(-150%); }
  100% { transform: skewX(-20deg) translateX(150%); }
}
.btn-glare { position: relative; overflow: hidden; }
.btn-glare::after {
  content: '';
  position: absolute;
  top: 0; left: -50%;
  width: 200%; height: 100%;
  background: linear-gradient(
    to right,
    rgb(var(--theme-glow) / 0) 0%,
    rgb(var(--theme-glow) / 0.07) 30%,
    rgb(var(--theme-glow) / 0.2) 50%,
    rgb(var(--theme-glow) / 0.07) 70%,
    rgb(var(--theme-glow) / 0) 100%
  );
  transform: skewX(-20deg) translateX(-150%);
  pointer-events: none;
}
.btn.btn-glare::after { animation: glare-sweep 4s infinite ease-in-out; }

@keyframes card-glare-sweep {
  0%   { left: -80%; opacity: 1; }
  100% { left: 140%; opacity: 1; }
}
.card-hover-glare { position: relative; overflow: hidden; }
.card-hover-glare::after {
  content: '';
  position: absolute;
  top: -10%; left: -80%;
  width: 45%; height: 120%;
  background: linear-gradient(
    105deg,
    transparent 0%,
    rgb(var(--theme-glow) / 0.06) 35%,
    rgb(var(--theme-glow) / 0.16) 50%,
    rgb(var(--theme-glow) / 0.06) 65%,
    transparent 100%
  );
  transform: skewX(-20deg);
  pointer-events: none;
  opacity: 0;
}
.card-hover-glare:hover::after {
  animation: card-glare-sweep 0.65s ease-out;
}

@keyframes code-copy-sweep {
  0%   { left: -60%; opacity: 0; }
  10%  { opacity: 1; }
  100% { left: 130%; opacity: 0; }
}
.code-copy-glare {
  position: absolute;
  top: -10%; left: -60%;
  width: 40%; height: 120%;
  z-index: 5;
  pointer-events: none;
  background: linear-gradient(
    105deg,
    transparent 0%,
    rgb(var(--theme-glow) / 0.06) 35%,
    rgb(var(--theme-glow) / 0.16) 50%,
    rgb(var(--theme-glow) / 0.06) 65%,
    transparent 100%
  );
  transform: skewX(-20deg);
  animation: code-copy-sweep 0.7s ease-out;
}

/* --------------------------------------------------------------------------
   9. Prose (markdown rendering)
   -------------------------------------------------------------------------- */

.sty-prose {
  font-size: 1.03125rem;
  line-height: 1.8;
  color: rgb(var(--color-fg-dim));
}
.sty-prose > * + * { margin-top: 1.4rem; }

.sty-prose h2, .sty-prose h3, .sty-prose h4, .sty-prose h5, .sty-prose h6 {
  font-family: 'Space Grotesk', sans-serif;
  color: rgb(var(--color-fg));
  line-height: 1.3;
  scroll-margin-top: calc(var(--header-height) + 1rem);
  position: relative;
}
.sty-prose h2 {
  font-size: 1.65rem;
  margin-top: 3rem;
  padding-top: 0.25rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid rgb(var(--color-border));
}
.sty-prose h3 { font-size: 1.3rem; margin-top: 2.25rem; }
.sty-prose h4 { font-size: 1.1rem; margin-top: 1.8rem; }

.sty-prose h2 a, .sty-prose h3 a, .sty-prose h4 a { color: inherit; text-decoration: none; }

.sty-prose .anchor-link {
  opacity: 0;
  margin-left: 0.45em;
  font-family: 'Space Mono', monospace;
  font-weight: 400;
  font-size: 0.85em;
  color: rgb(var(--color-muted-dark));
  text-decoration: none;
  white-space: nowrap; /* never leave a dangling '#' on its own line */
}
.sty-prose h2:hover .anchor-link,
.sty-prose h3:hover .anchor-link,
.sty-prose h4:hover .anchor-link { opacity: 1; }

.sty-prose p { color: rgb(var(--color-fg-dim)); }
.sty-prose strong { color: rgb(var(--color-fg)); font-weight: 600; }
.sty-prose em { color: rgb(var(--color-fg)); }

.sty-prose a {
  color: rgb(var(--color-fg));
  text-decoration: underline;
  text-decoration-color: rgb(var(--color-muted-dark));
  text-underline-offset: 3px;
  transition: text-decoration-color 0.2s;
}
.sty-prose a:hover { text-decoration-color: rgb(var(--color-fg)); }

.sty-prose ul, .sty-prose ol { padding-left: 1.5rem; }
.sty-prose li { margin-top: 0.4rem; color: rgb(var(--color-fg-dim)); }
.sty-prose li::marker { color: rgb(var(--color-muted)); font-family: 'Space Mono', monospace; }
.sty-prose li > ul, .sty-prose li > ol { margin-top: 0.4rem; }
.sty-prose ul { list-style: square; }
.sty-prose ol { list-style: decimal; }

/* task lists */
.sty-prose li.task-list-item { list-style: none; margin-left: -1.25rem; }
.sty-prose li.task-list-item input[type='checkbox'] {
  accent-color: rgb(var(--color-fg));
  margin-right: 0.5rem;
}

.sty-prose blockquote {
  border-left: 3px solid rgb(var(--color-border-hover));
  padding: 0.4rem 0 0.4rem 1.25rem;
  color: rgb(var(--color-muted));
}
.sty-prose blockquote p { color: rgb(var(--color-muted)); }

/* callouts: kramdown IAL on a blockquote, e.g. {: .callout } */
.sty-prose blockquote.callout {
  border-left: 3px solid rgb(var(--theme-glow) / 0.5);
  background: rgb(var(--color-card));
  border-radius: 0.5rem;
  border: 1px solid rgb(var(--color-border));
  padding: 1rem 1.25rem;
  color: rgb(var(--color-fg-dim));
}
.sty-prose blockquote.callout p { color: rgb(var(--color-fg-dim)); }
.sty-prose blockquote.callout > p:first-child strong {
  font-family: 'Space Mono', monospace;
  font-size: 0.8125rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.sty-prose hr {
  border: 0;
  border-top: 1px solid rgb(var(--color-border));
  margin: 3rem 0;
}

.sty-prose img {
  border: 1px solid rgb(var(--color-border));
  border-radius: 0.5rem;
}

.sty-prose kbd {
  display: inline-block;
  padding: 0.15rem 0.45rem;
  font-size: 0.75em;
  border: 1px solid rgb(var(--color-border-hover));
  border-bottom-width: 2px;
  border-radius: 0.375rem;
  background: rgb(var(--color-surface));
  color: rgb(var(--color-fg));
}

/* inline code: render as an atomic chip. It must never split mid-token -
   Chrome treats '-' as a line-break opportunity (UAX14) and chopped
   identifiers like readonly-user across lines. The chip is now a single
   unbreakable inline-block; on very narrow screens an over-long token
   scrolls inside the chip instead of overflowing the page. */
.sty-prose code {
  display: inline-block;
  max-width: 100%;
  overflow-x: auto;
  /* inline-block with non-visible overflow loses its text baseline (CSS
     uses the bottom margin edge instead), which floats chips above the
     line. -0.6em re-aligns the chip's glyph baseline with the text. */
  vertical-align: -0.6em;
  white-space: nowrap;
  font-family: 'Space Mono', monospace;
  font-size: 0.85em;
  background: rgb(var(--color-surface));
  border: 1px solid rgb(var(--color-border));
  padding: 0.14rem 0.4rem;
  border-radius: 0.375rem;
  color: rgb(var(--color-fg));
}

/* fenced code blocks (kramdown + rouge). NOTE: inline code spans also
   carry the `highlighter-rouge` class, so every rule here targets the
   block wrapper (div) only - never inline chips. */
.sty-prose div.highlighter-rouge {
  position: relative;
  margin: 0;
  border: 1px solid rgb(var(--color-border));
  border-radius: 0.5rem;
  overflow: hidden;
  background: rgb(var(--color-code));
}
.sty-prose div.highlight {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}
.sty-prose pre.highlight {
  padding: 1.15rem 1.25rem;
  margin: 0;
  font-size: 0.8125rem;
  line-height: 1.75;
}
.sty-prose pre code {
  display: inline;
  white-space: pre;
  background: transparent;
  border: 0;
  padding: 0;
  font-size: inherit;
  color: inherit;
}
/* mermaid fences are code blocks too, until JS renders them */
.sty-prose code.language-mermaid { white-space: pre; }

/* rouge token palette: dim comments, keep the rest in fg hierarchy */
.highlight .c, .highlight .c1, .highlight .cm, .highlight .cs,
.highlight .gd, .highlight .gh, .highlight .gi { color: rgb(var(--color-muted)); }
.highlight .k, .highlight .kd, .highlight .kn, .highlight .kp, .highlight .kr,
.highlight .kt, .highlight .nc, .highlight .nf, .highlight .nb { color: rgb(var(--color-fg)); font-weight: 500; }
.highlight .s, .highlight .s1, .highlight .s2, .highlight .sb, .highlight .sa,
.highlight .dl, .highlight .se, .highlight .sh { color: rgb(var(--color-fg-dim)); }
.highlight .o, .highlight .p, .highlight .mi, .highlight .mf, .highlight .mh,
.highlight .nl, .highlight .na, .highlight .nv { color: rgb(var(--color-muted)); }

/* code block scrollbars */
.highlight::-webkit-scrollbar { height: 10px; }
.highlight::-webkit-scrollbar-track { background: rgb(var(--color-surface)); }
.highlight::-webkit-scrollbar-thumb { background: rgb(var(--color-muted-dark)); border-radius: 999px; }

/* copy button */
.code-block { position: relative; overflow: hidden; }
.sty-prose .code-block > .highlighter-rouge { border-radius: 0.5rem; }
.copy-btn {
  position: absolute;
  top: 0.5rem; right: 0.5rem;
  z-index: 10;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  border: 1px solid rgb(var(--color-border));
  background: rgb(var(--color-card));
  color: rgb(var(--color-fg) / 0.7);
  font-family: 'Space Mono', monospace;
  font-size: 11px;
  line-height: 1;
  padding: 0.3rem 0.55rem;
  border-radius: 0.375rem;
  cursor: pointer;
  opacity: 0;
  transition: opacity 200ms ease, color 200ms ease, border-color 200ms ease;
}
.code-block:hover .copy-btn, .copy-btn:focus-visible { opacity: 1; }
.copy-btn:hover { color: rgb(var(--color-fg)); border-color: rgb(var(--color-fg) / 0.4); }
.copy-btn.is-copied {
  border-color: rgb(var(--color-fg) / 0.4);
  color: rgb(var(--color-fg));
  background: rgb(var(--color-fg) / 0.05);
  opacity: 1;
}

/* --------------------------------------------------------------------------
   10. Tables
   -------------------------------------------------------------------------- */

.sty-prose .table-scroll {
  width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border: 1px solid rgb(var(--color-border));
  border-radius: 0.5rem;
}
.sty-prose table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
  font-family: 'Inter', sans-serif;
}
.sty-prose .table-scroll > table { margin: 0; min-width: 36rem; }
.sty-prose th, .sty-prose td {
  border: 1px solid rgb(var(--color-border));
  padding: 0.6rem 0.95rem;
  text-align: left;
  vertical-align: top;
}
.sty-prose th {
  background: rgb(var(--color-surface));
  color: rgb(var(--color-fg));
  font-weight: 600;
  font-family: 'Space Grotesk', sans-serif;
}
.sty-prose td { color: rgb(var(--color-fg-dim)); }
.sty-prose th code, .sty-prose td code { white-space: nowrap; }

/* --------------------------------------------------------------------------
   11. Mermaid
   -------------------------------------------------------------------------- */

.mermaid-viewport {
  border: 1px solid rgb(var(--color-border));
  border-radius: 0.5rem;
  background: rgb(var(--color-card));
  overflow: hidden;
}
.mermaid-diagram { overflow: auto; padding: 1rem; }
.mermaid-diagram svg { max-width: 100%; height: auto; display: block; }
.mermaid-viewport text { font-family: 'Space Mono', monospace; }

/* --------------------------------------------------------------------------
   12. Prev / next
   -------------------------------------------------------------------------- */

.prev-next {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-top: 4rem;
  padding-top: 2rem;
  border-top: 1px solid rgb(var(--color-border));
}
.prev-next__item {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  padding: 1rem 1.25rem;
  border: 1px solid rgb(var(--color-border));
  border-radius: 0.5rem;
  text-decoration: none;
  color: rgb(var(--color-fg));
  transition: border-color 200ms ease;
}
.prev-next__item:hover { border-color: rgb(var(--color-border-hover)); }
.prev-next__item--next { text-align: right; }
.prev-next__dir {
  font-family: 'Space Mono', monospace;
  font-size: 0.6875rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: rgb(var(--color-muted));
}
.prev-next__title {
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 500;
  font-size: 1rem;
}

/* --------------------------------------------------------------------------
   13. Site footer
   -------------------------------------------------------------------------- */

.site-footer {
  border-top: 1px solid rgb(var(--color-border));
  background: rgb(var(--color-bg));
}
.site-footer__inner {
  max-width: 92rem;
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem 2rem;
  padding: 1.25rem;
}
.site-footer__top {
  color: rgb(var(--color-muted));
  text-decoration: none;
}
.site-footer__top:hover { color: rgb(var(--color-fg)); }

/* --------------------------------------------------------------------------
   14. Reduced motion & no-JS
   -------------------------------------------------------------------------- */

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  body, main, header, nav, article, aside, footer { transition-duration: 0.01ms; }
  .theme-toggle.animate-flicker-glow { animation: none; }
  .btn.btn-glare::after, .card-hover-glare::after { animation: none; }
}

/* --------------------------------------------------------------------------
   15. Breadcrumbs + Edit this page
   -------------------------------------------------------------------------- */

.docs__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem 1rem;
  margin-bottom: 0.9rem;
}
.crumbs__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  margin: 0;
  padding: 0;
  list-style: none;
}
.crumbs__item {
  display: inline-flex;
  align-items: center;
  font-size: 0.8125rem;
  color: rgb(var(--color-muted-dark));
}
.crumbs__item:not(:last-child)::after {
  content: '/';
  margin-left: 0.5rem;
  opacity: 0.55;
}
.crumbs__item a {
  color: rgb(var(--color-muted-dark));
  text-decoration: none;
}
.crumbs__item a:hover { color: rgb(var(--color-fg)); text-decoration: underline; }
.crumbs__item[aria-current='page'] { color: rgb(var(--color-fg-dim)); }
.edit-link {
  display: inline-block;
  font-family: 'Space Mono', monospace;
  font-size: 0.72rem;
  color: rgb(var(--color-muted-dark));
  text-decoration: none;
  border: 1px solid rgb(var(--color-border));
  padding: 0.22rem 0.6rem;
  border-radius: 0.4rem;
  white-space: nowrap;
}
.edit-link:hover {
  color: rgb(var(--color-fg));
  border-color: rgb(var(--color-border-hover));
}

/* --------------------------------------------------------------------------
   16. Search overlay
   -------------------------------------------------------------------------- */

body.modal-open { overflow: hidden; }

.search-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.25rem;
  height: 2.25rem;
  margin-right: 0.3rem;
  border: 1px solid rgb(var(--color-border));
  background: transparent;
  color: rgb(var(--color-muted-dark));
  border-radius: 0.5rem;
  cursor: pointer;
  transition: color 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}
.search-toggle:hover {
  color: rgb(var(--color-fg));
  border-color: rgb(var(--color-border-hover));
  background: rgb(var(--color-surface));
}

.search-overlay {
  position: fixed;
  inset: 0;
  z-index: 300;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding: 11vh 1rem 1rem;
  background: rgb(var(--color-bg) / 0.68);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
}
.search-overlay[hidden] { display: none; }
.search-overlay__panel {
  width: min(92vw, 46rem);
  max-height: 78vh;
  display: flex;
  flex-direction: column;
  background: rgb(var(--color-surface));
  border: 1px solid rgb(var(--color-border));
  border-radius: 0.75rem;
  box-shadow: 0 18px 50px rgb(0 0 0 / 0.35);
  overflow: hidden;
}
.search-overlay__bar {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0 1rem;
  border-bottom: 1px solid rgb(var(--color-border));
  color: rgb(var(--color-muted-dark));
}
.search-overlay__input {
  flex: 1;
  min-width: 0;
  background: transparent;
  border: 0;
  outline: none;
  color: rgb(var(--color-fg));
  font: inherit;
  font-size: 1.05rem;
  padding: 1rem 0;
}
.search-overlay__input::placeholder { color: rgb(var(--color-muted)); }
.search-overlay__close {
  font-family: 'Space Mono', monospace;
  font-size: 0.7rem;
  color: rgb(var(--color-muted-dark));
  background: transparent;
  border: 1px solid rgb(var(--color-border));
  border-radius: 0.375rem;
  padding: 0.2rem 0.55rem;
  cursor: pointer;
}
.search-overlay__close:hover { color: rgb(var(--color-fg)); border-color: rgb(var(--color-border-hover)); }
.search-overlay__meta {
  margin: 0;
  padding: 0.55rem 1rem;
  font-family: 'Space Mono', monospace;
  font-size: 0.72rem;
  color: rgb(var(--color-muted-dark));
  border-bottom: 1px solid rgb(var(--color-border));
}
.search-overlay__results {
  margin: 0;
  padding: 0;
  list-style: none;
  overflow-y: auto;
  overscroll-behavior: contain;
}
.search-overlay__result a {
  display: block;
  padding: 0.7rem 1rem;
  border-bottom: 1px solid rgb(var(--color-border));
  text-decoration: none;
  color: rgb(var(--color-fg));
}
.search-overlay__result a:hover,
.search-overlay__result a.is-active { background: rgb(var(--color-card)); }
.search-overlay__result-title {
  display: block;
  font-weight: 500;
}
.search-overlay__result-snippet {
  display: block;
  margin-top: 0.15rem;
  font-size: 0.8125rem;
  line-height: 1.5;
  color: rgb(var(--color-muted-dark));
}
.search-overlay__result mark {
  background: rgb(var(--theme-glow) / 0.28);
  color: inherit;
  border-radius: 2px;
  padding: 0 1px;
}

/* --------------------------------------------------------------------------
   17. Floating back-to-top button
   -------------------------------------------------------------------------- */

.back-to-top {
  position: fixed;
  right: 1.25rem;
  bottom: 1.25rem;
  z-index: 90;
  width: 2.5rem;
  height: 2.5rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid rgb(var(--color-border));
  border-radius: 999px;
  background: rgb(var(--color-surface) / 0.92);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  color: rgb(var(--color-fg));
  cursor: pointer;
  box-shadow: 0 6px 20px rgb(0 0 0 / 0.25);
  opacity: 1;
  transition: opacity 0.25s ease, border-color 0.2s ease, transform 0.2s ease;
}
.back-to-top:hover { border-color: rgb(var(--color-border-hover)); transform: translateY(-2px); }
.back-to-top[hidden] { display: none; }

@media (max-width: 480px) {
  .back-to-top { right: 0.9rem; bottom: 0.9rem; }
}