/* Mashgin FAQ Docs — Mintlify-style three-column documentation theme.
   Tokens on :root, redefined for dark under both the media query and
   [data-theme="dark"] (SPEC §10). */

/* ------------------------------------------------------------------ fonts */
@font-face {
  font-family: 'Inter';
  font-style: normal;
  font-weight: 100 900;
  font-display: swap;
  src: url('/fonts/inter-latin.woff2') format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA,
                 U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122,
                 U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: 'Inter';
  font-style: normal;
  font-weight: 100 900;
  font-display: swap;
  src: url('/fonts/inter-latin-ext.woff2') format('woff2');
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF,
                 U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF,
                 U+2020, U+20A0-20AB, U+20AD-20C0, U+2113, U+2C60-2C7F, U+A720-A7FF;
}

/* ----------------------------------------------------------------- tokens */
:root {
  --brand:            #2f8f79;
  --brand-strong:     #26745f;
  --brand-soft:       #e8f5f0;
  --accent-ring:      rgba(47, 143, 121, .28);

  --bg:               #ffffff;
  --bg-subtle:        #f9fafb;
  --bg-sunken:        #f4f5f6;
  --bg-code:          #f6f7f8;
  --bg-elevated:      #ffffff;

  --text:             #1b1b1f;
  --text-muted:       #5c6169;
  --text-faint:       #82878f;
  --text-inverse:     #ffffff;

  --border:           #e6e8eb;
  --border-strong:    #d3d7dd;

  --radius-sm: 6px;
  --radius:    10px;
  --radius-lg: 14px;

  --shadow-sm: 0 1px 2px rgba(16,24,40,.05);
  --shadow:    0 2px 8px rgba(16,24,40,.06), 0 1px 2px rgba(16,24,40,.04);
  --shadow-lg: 0 12px 32px rgba(16,24,40,.12), 0 2px 8px rgba(16,24,40,.06);

  --nav-h:      64px;
  --sidebar-w:  17rem;
  --toc-w:      15rem;
  --content-max: 46rem;          /* ~72ch at 16px */

  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --mono: ui-monospace, SFMono-Regular, 'SF Mono', Menlo, Consolas, monospace;

  --cb-note:   #3b82f6; --cb-note-bg:   #eff6ff;
  --cb-tip:    #12a150; --cb-tip-bg:    #ecfdf3;
  --cb-warn:   #d97706; --cb-warn-bg:   #fffbeb;
  --cb-danger: #dc2626; --cb-danger-bg: #fef2f2;

  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --brand:        #5fc9ac;
    --brand-strong: #7fd9c0;
    --brand-soft:   #10241f;
    --accent-ring:  rgba(95, 201, 172, .3);

    --bg:           #0b0c0e;
    --bg-subtle:    #111316;
    --bg-sunken:    #15181c;
    --bg-code:      #121417;
    --bg-elevated:  #131619;

    --text:         #e8eaed;
    --text-muted:   #9ba1aa;
    --text-faint:   #767c85;
    --text-inverse: #0b0c0e;

    --border:       #23262b;
    --border-strong:#31353c;

    --shadow-sm: 0 1px 2px rgba(0,0,0,.4);
    --shadow:    0 2px 8px rgba(0,0,0,.45);
    --shadow-lg: 0 12px 32px rgba(0,0,0,.6);

    --cb-note-bg:   #0e1a2b; --cb-tip-bg:    #0c1f16;
    --cb-warn-bg:   #231a09; --cb-danger-bg: #241011;

    color-scheme: dark;
  }
}

:root[data-theme="dark"] {
  --brand:        #5fc9ac;
  --brand-strong: #7fd9c0;
  --brand-soft:   #10241f;
  --accent-ring:  rgba(95, 201, 172, .3);

  --bg:           #0b0c0e;
  --bg-subtle:    #111316;
  --bg-sunken:    #15181c;
  --bg-code:      #121417;
  --bg-elevated:  #131619;

  --text:         #e8eaed;
  --text-muted:   #9ba1aa;
  --text-faint:   #767c85;
  --text-inverse: #0b0c0e;

  --border:       #23262b;
  --border-strong:#31353c;

  --shadow-sm: 0 1px 2px rgba(0,0,0,.4);
  --shadow:    0 2px 8px rgba(0,0,0,.45);
  --shadow-lg: 0 12px 32px rgba(0,0,0,.6);

  --cb-note-bg:   #0e1a2b; --cb-tip-bg:    #0c1f16;
  --cb-warn-bg:   #231a09; --cb-danger-bg: #241011;

  color-scheme: dark;
}

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

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; }
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a { color: var(--brand); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 2px; }

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

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

.skip-link {
  position: absolute; left: -9999px; top: 0; z-index: 200;
  background: var(--brand); color: #fff; padding: .6rem 1rem;
  border-radius: 0 0 var(--radius) 0; font-weight: 600;
}
.skip-link:focus { left: 0; }

/* ---------------------------------------------------------------- navbar */
.navbar {
  position: sticky; top: 0; z-index: 60;
  height: var(--nav-h);
  display: flex; align-items: center; gap: 1rem;
  padding: 0 1.5rem;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: saturate(180%) blur(12px);
  -webkit-backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--border);
}

.nav-brand { display: flex; align-items: center; gap: .65rem; flex-shrink: 0; }
.nav-brand:hover { text-decoration: none; }
.nav-brand img { height: 26px; width: auto; display: block; }
/* The mark and wordmark go back to the marketing site; "FAQ Hub" stays here.
   Two separate links, so neither swallows the other's target. */
.nav-brand .brand-home { display: flex; align-items: center; gap: .65rem; }
.nav-brand a:hover { text-decoration: none; }
.nav-brand .brand-home:hover .brand-word,
.nav-brand .brand-label:hover { color: var(--brand); }
.nav-brand .brand-word {
  font-size: 1.02rem; font-weight: 700; letter-spacing: -.02em; color: var(--text);
}
.nav-brand .brand-divider {
  width: 1px; height: 20px; background: var(--border-strong); margin: 0 .1rem;
}
.nav-brand .brand-label {
  font-size: .95rem; font-weight: 600; color: var(--text); letter-spacing: -.01em;
}

.nav-spacer { flex: 1; }

.nav-links { display: flex; align-items: center; gap: 1.5rem; }
.nav-links a {
  font-size: .875rem; font-weight: 500; color: var(--text-muted);
  padding: .25rem 0; border-bottom: 2px solid transparent;
}
.nav-links a:hover { color: var(--text); text-decoration: none; }
.nav-links a.active { color: var(--text); border-bottom-color: var(--brand); }

/* search trigger */
.search-trigger {
  display: flex; align-items: center; gap: .5rem;
  min-width: 15rem; height: 36px; padding: 0 .55rem 0 .7rem;
  background: var(--bg-subtle); color: var(--text-faint);
  border: 1px solid var(--border); border-radius: var(--radius);
  font: inherit; font-size: .875rem; cursor: pointer;
  transition: border-color .15s, background .15s;
}
.search-trigger:hover { border-color: var(--border-strong); background: var(--bg-sunken); }
.search-trigger svg { width: 15px; height: 15px; flex-shrink: 0; }
.search-trigger .st-label { flex: 1; text-align: left; }
.search-trigger kbd {
  font-family: var(--font); font-size: .7rem; font-weight: 600;
  color: var(--text-faint); background: var(--bg);
  border: 1px solid var(--border); border-radius: 5px; padding: .1rem .35rem;
}

.icon-btn {
  display: inline-flex; align-items: center; justify-content: center;
  width: 36px; height: 36px; flex-shrink: 0;
  background: none; border: 1px solid transparent; border-radius: var(--radius);
  color: var(--text-muted); cursor: pointer;
}
.icon-btn:hover { background: var(--bg-sunken); color: var(--text); }
.icon-btn svg { width: 18px; height: 18px; }

.theme-toggle .moon { display: none; }
:root[data-theme="dark"] .theme-toggle .sun { display: none; }
:root[data-theme="dark"] .theme-toggle .moon { display: block; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .theme-toggle .sun  { display: none; }
  :root:not([data-theme="light"]) .theme-toggle .moon { display: block; }
}

.nav-cta {
  display: inline-flex; align-items: center; height: 36px; padding: 0 .95rem;
  background: var(--brand); color: #fff; border-radius: var(--radius);
  font-size: .875rem; font-weight: 600; white-space: nowrap;
}
.nav-cta:hover { background: var(--brand-strong); text-decoration: none; color: #fff; }
:root[data-theme="dark"] .nav-cta { color: var(--text-inverse); }

.menu-btn { display: none; }

/* ---------------------------------------------------------------- layout */
.layout {
  display: grid;
  grid-template-columns: var(--sidebar-w) minmax(0, 1fr) var(--toc-w);
  gap: 0;
  max-width: 100rem;
  margin: 0 auto;
  align-items: start;
}

/* --------------------------------------------------------------- sidebar */
.sidebar {
  position: sticky; top: var(--nav-h);
  height: calc(100vh - var(--nav-h));
  overflow-y: auto; overscroll-behavior: contain;
  padding: 1.75rem 1rem 3rem 1.5rem;
  scrollbar-width: thin;
}
.sidebar::-webkit-scrollbar { width: 6px; }
.sidebar::-webkit-scrollbar-thumb { background: var(--border-strong); border-radius: 3px; }

.sb-group { margin-bottom: .35rem; }
.sb-group + .sb-group { margin-top: .25rem; }

.sb-title {
  display: flex; align-items: center; gap: .5rem;
  font-size: .76rem; font-weight: 700; text-transform: uppercase;
  letter-spacing: .06em; color: var(--text-faint);
  margin: 0; padding: .4rem .65rem;
  border-radius: var(--radius-sm); cursor: pointer;
  list-style: none; user-select: none;
}
.sb-title::-webkit-details-marker { display: none; }
.sb-title:hover { color: var(--text-muted); background: var(--bg-subtle); }
a.sb-title-text {
  flex: 1; min-width: 0;
  color: inherit; text-decoration: none; border-radius: 3px;
}
a.sb-title-text:hover { color: var(--brand); text-decoration: none; }
a.sb-title-text.active { color: var(--brand); }
.sb-dot { width: 7px; height: 7px; border-radius: 50%; flex-shrink: 0; }
.sb-count {
  font-size: .7rem; font-weight: 600; letter-spacing: 0;
  color: var(--text-faint); font-variant-numeric: tabular-nums;
}
/* chevron, rotating with the group's state */
.sb-title::after {
  content: ''; width: 6px; height: 6px; flex-shrink: 0;
  border-right: 1.5px solid currentColor; border-bottom: 1.5px solid currentColor;
  transform: rotate(-45deg) translate(-1px, -1px);
  transition: transform .15s ease; opacity: .7;
}
.sb-group[open] > .sb-title::after { transform: rotate(45deg) translate(-1px, -1px); }
.sb-group[open] > .sb-title { color: var(--text-muted); }
@media (prefers-reduced-motion: reduce) { .sb-title::after { transition: none; } }

.sb-list { list-style: none; margin: 0 0 .5rem; padding: 0; }
.sb-list a {
  display: block; padding: .38rem .65rem; margin-bottom: 1px;
  font-size: .875rem; line-height: 1.45; color: var(--text-muted);
  border-radius: var(--radius-sm);
  border-left: 2px solid transparent;
}
.sb-list a:hover { color: var(--text); background: var(--bg-subtle); text-decoration: none; }
.sb-list a.active {
  color: var(--brand); font-weight: 600;
  background: var(--brand-soft); border-left-color: var(--brand);
}

/* "View all N" at the foot of each group */
.sb-all a {
  display: block; padding: .3rem .65rem; margin-top: .1rem;
  font-size: .78rem; font-weight: 550; color: var(--text-faint);
  border-radius: var(--radius-sm); border-left: 2px solid transparent;
}
.sb-all a:hover { color: var(--brand); background: var(--bg-subtle); text-decoration: none; }

/* the folded tail of a long group */
.sb-more > details > summary {
  display: block; padding: .32rem .65rem; cursor: pointer;
  font-size: .8rem; color: var(--text-faint); list-style: none;
  border-radius: var(--radius-sm);
}
.sb-more > details > summary::-webkit-details-marker { display: none; }
.sb-more > details > summary::before { content: '+ '; }
.sb-more > details[open] > summary::before { content: '– '; }
.sb-more > details > summary:hover { color: var(--brand); background: var(--bg-subtle); }
.sb-more .sb-list { margin-bottom: 0; }

.sb-meta {
  margin-top: 2rem; padding: .85rem .65rem 0;
  border-top: 1px solid var(--border);
  font-size: .75rem; color: var(--text-faint); line-height: 1.6;
}
.sb-meta a { color: var(--text-muted); }

/* --------------------------------------------------------------- content */
.content {
  min-width: 0;
  padding: 2.5rem 3rem 5rem;
}
.content-inner { max-width: var(--content-max); }

.breadcrumb {
  display: flex; flex-wrap: wrap; align-items: center; gap: .4rem;
  font-size: .8rem; color: var(--text-faint); margin-bottom: .85rem;
}
.breadcrumb a { color: var(--text-muted); }
.breadcrumb .sep { color: var(--border-strong); }

.page-title {
  font-size: 2.35rem; line-height: 1.18; font-weight: 700;
  letter-spacing: -.026em; margin: 0 0 .7rem; color: var(--text);
}
.page-lead {
  font-size: 1.1rem; line-height: 1.65; color: var(--text-muted);
  margin: 0 0 1.5rem;
}

.pill-row { display: flex; flex-wrap: wrap; gap: .4rem; margin-bottom: 1.5rem; }
.pill {
  display: inline-flex; align-items: center; gap: .4rem;
  font-size: .75rem; font-weight: 600; line-height: 1;
  padding: .32rem .6rem; border-radius: 999px;
  border: 1px solid var(--border-strong); color: var(--text-muted);
  background: var(--bg-subtle);
}
.pill .pill-dot { width: 6px; height: 6px; border-radius: 50%; }
.pill:hover { text-decoration: none; border-color: var(--brand); color: var(--text); }

.hero-figure { margin: 0 0 2.25rem; }
.hero-figure img {
  width: 100%; border-radius: var(--radius-lg);
  border: 1px solid var(--border); box-shadow: var(--shadow);
  aspect-ratio: 16 / 9; object-fit: cover; background: var(--bg-sunken);
}

/* ------------------------------------------------------------ prose */
.prose { font-size: 1rem; line-height: 1.75; }

.prose h2, .prose h3, .prose h4 {
  scroll-margin-top: calc(var(--nav-h) + 1.25rem);
  color: var(--text); letter-spacing: -.018em; font-weight: 650;
  position: relative;
}
.prose h2 {
  font-size: 1.4rem; line-height: 1.35; margin: 2.75rem 0 .9rem;
  padding-top: 1.5rem; border-top: 1px solid var(--border);
}
.prose h2:first-child { margin-top: 0; padding-top: 0; border-top: none; }
.prose h3 { font-size: 1.12rem; margin: 2rem 0 .7rem; }
.prose h4 { font-size: 1rem; margin: 1.6rem 0 .6rem; }

.prose .anchor {
  position: absolute; left: -1.1rem; top: 50%; transform: translateY(-50%);
  color: var(--text-faint); opacity: 0; font-weight: 400;
  text-decoration: none; padding: 0 .25rem;
  transition: opacity .12s;
}
.prose h2 .anchor { top: auto; bottom: .1rem; transform: none; }
.prose h2:hover .anchor, .prose h3:hover .anchor,
.prose h4:hover .anchor, .prose .anchor:focus-visible { opacity: 1; }

.prose p { margin: 0 0 1.1rem; }
.prose strong { font-weight: 650; color: var(--text); }

.prose ul, .prose ol { margin: 0 0 1.2rem; padding-left: 1.4rem; }
.prose li { margin-bottom: .45rem; }
.prose li::marker { color: var(--text-faint); }
.prose ul ul, .prose ol ol, .prose ul ol, .prose ol ul { margin: .45rem 0 0; }

.prose blockquote {
  margin: 1.4rem 0; padding: .1rem 0 .1rem 1.1rem;
  border-left: 3px solid var(--border-strong); color: var(--text-muted);
}
.prose hr { border: none; border-top: 1px solid var(--border); margin: 2.25rem 0; }

.prose code {
  font-family: var(--mono); font-size: .875em;
  background: var(--bg-code); border: 1px solid var(--border);
  padding: .12em .38em; border-radius: 5px; color: var(--text);
}

/* tables */
.table-wrap {
  margin: 1.5rem 0; overflow-x: auto;
  border: 1px solid var(--border); border-radius: var(--radius);
  background: var(--bg-elevated);
}
.prose table { border-collapse: collapse; width: 100%; font-size: .9rem; }
.prose thead { background: var(--bg-subtle); }
.prose th {
  text-align: left; font-weight: 650; color: var(--text);
  padding: .7rem .9rem; border-bottom: 1px solid var(--border);
  white-space: nowrap;
}
.prose td {
  padding: .7rem .9rem; border-bottom: 1px solid var(--border);
  color: var(--text-muted); vertical-align: top;
}
.prose tbody tr:last-child td { border-bottom: none; }
.prose tbody tr:hover { background: var(--bg-subtle); }
.prose td strong { color: var(--text); }

/* callouts (SPEC §9 directives) */
.callout {
  display: flex; flex-direction: column; gap: .25rem;
  margin: 1.5rem 0; padding: .9rem 1.1rem;
  border-radius: var(--radius); border: 1px solid var(--border);
  border-left-width: 3px; background: var(--bg-subtle);
}
.callout-title { font-weight: 650; font-size: .875rem; }
.callout-body > :last-child { margin-bottom: 0; }
.callout-body { font-size: .94rem; color: var(--text-muted); }
.callout-note, .callout-info { border-left-color: var(--cb-note);   background: var(--cb-note-bg); }
.callout-note .callout-title, .callout-info .callout-title { color: var(--cb-note); }
.callout-tip, .callout-check { border-left-color: var(--cb-tip);    background: var(--cb-tip-bg); }
.callout-tip .callout-title, .callout-check .callout-title { color: var(--cb-tip); }
.callout-warning { border-left-color: var(--cb-warn);   background: var(--cb-warn-bg); }
.callout-warning .callout-title { color: var(--cb-warn); }
.callout-danger  { border-left-color: var(--cb-danger); background: var(--cb-danger-bg); }
.callout-danger .callout-title { color: var(--cb-danger); }

/* code blocks */
.code-block {
  margin: 1.5rem 0; border: 1px solid var(--border);
  border-radius: var(--radius); overflow: hidden; background: var(--bg-code);
}
.code-head {
  display: flex; align-items: center; justify-content: space-between;
  padding: .4rem .5rem .4rem .9rem;
  background: var(--bg-subtle); border-bottom: 1px solid var(--border);
}
.code-lang { font-family: var(--mono); font-size: .75rem; color: var(--text-faint); }
.copy-btn {
  font: inherit; font-size: .75rem; font-weight: 500;
  color: var(--text-muted); background: none;
  border: 1px solid var(--border); border-radius: 6px;
  padding: .2rem .5rem; cursor: pointer;
}
.copy-btn:hover { background: var(--bg); color: var(--text); }
.copy-btn.copied { color: var(--cb-tip); border-color: var(--cb-tip); }
.code-block pre { margin: 0; padding: .95rem 1rem; overflow-x: auto; }
.code-block code {
  font-family: var(--mono); font-size: .84rem; line-height: 1.65;
  background: none; border: none; padding: 0;
}

/* steps / accordion / tabs / cards */
.steps { list-style: none; counter-reset: step; padding-left: 0; }
.steps > li {
  counter-increment: step; position: relative;
  padding: 0 0 1.4rem 2.5rem; border-left: 1px solid var(--border); margin-left: .85rem;
}
.steps > li:last-child { border-left-color: transparent; padding-bottom: 0; }
.steps > li::before {
  content: counter(step);
  position: absolute; left: -.85rem; top: 0;
  width: 1.7rem; height: 1.7rem; border-radius: 50%;
  display: grid; place-items: center;
  background: var(--bg-sunken); border: 1px solid var(--border);
  font-size: .78rem; font-weight: 650; color: var(--text-muted);
}
.steps > li > :first-child { margin-top: 0; }

.accordion {
  margin: 1rem 0; border: 1px solid var(--border);
  border-radius: var(--radius); background: var(--bg-elevated);
}
.accordion summary {
  padding: .8rem 1rem; cursor: pointer; font-weight: 600; font-size: .94rem;
  list-style: none;
}
.accordion summary::-webkit-details-marker { display: none; }
.accordion summary::before { content: '▸'; margin-right: .55rem; color: var(--text-faint); }
.accordion[open] summary::before { content: '▾'; }
.accordion-body { padding: 0 1rem .85rem; color: var(--text-muted); }
.accordion-body > :last-child { margin-bottom: 0; }

.tabs { margin: 1.5rem 0; }
.tab-bar { display: flex; gap: .25rem; border-bottom: 1px solid var(--border); }
.tab-btn {
  font: inherit; font-size: .875rem; font-weight: 500;
  background: none; border: none; border-bottom: 2px solid transparent;
  padding: .5rem .8rem; color: var(--text-muted); cursor: pointer;
}
.tab-btn.active { color: var(--brand); border-bottom-color: var(--brand); font-weight: 600; }
.tab-pane { display: none; padding-top: 1rem; }
.tab-pane.active { display: block; }

.card-grid {
  display: grid; gap: 1rem; margin: 1.5rem 0;
  grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr));
}

/* ------------------------------------------------------------ page footer */
.page-foot { margin-top: 3.5rem; border-top: 1px solid var(--border); padding-top: 1.75rem; }

.helpful {
  display: flex; align-items: center; gap: .75rem; flex-wrap: wrap;
  font-size: .875rem; color: var(--text-muted); margin-bottom: 2rem;
}
.helpful-btns { display: flex; gap: .4rem; }
.helpful button {
  font: inherit; font-size: .8rem; font-weight: 500;
  padding: .3rem .75rem; cursor: pointer;
  background: var(--bg); color: var(--text-muted);
  border: 1px solid var(--border); border-radius: var(--radius-sm);
}
.helpful button:hover { border-color: var(--brand); color: var(--brand); }
.helpful button.picked { background: var(--brand-soft); border-color: var(--brand); color: var(--brand); }

.prevnext { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.pn {
  display: flex; flex-direction: column; gap: .2rem;
  padding: .85rem 1rem; border: 1px solid var(--border);
  border-radius: var(--radius); background: var(--bg-elevated);
  transition: border-color .15s, box-shadow .15s;
}
.pn:hover { border-color: var(--brand); box-shadow: var(--shadow); text-decoration: none; }
.pn-label { font-size: .74rem; color: var(--text-faint); font-weight: 600;
            text-transform: uppercase; letter-spacing: .05em; }
.pn-title { font-size: .92rem; font-weight: 600; color: var(--text); line-height: 1.4; }
.pn.next { text-align: right; }
.pn.placeholder { visibility: hidden; }

.foot-note {
  margin-top: 2rem; font-size: .8rem; color: var(--text-faint); line-height: 1.7;
}
.foot-note a { color: var(--text-muted); }

/* related cards */
.related { margin-top: 3rem; }
.related h2 { font-size: 1.15rem; margin: 0 0 1rem; font-weight: 650; }
.rel-grid { display: grid; gap: 1rem; grid-template-columns: repeat(auto-fit, minmax(14rem, 1fr)); }
.rel-card {
  display: flex; flex-direction: column; gap: .45rem;
  padding: 1rem; border: 1px solid var(--border);
  border-radius: var(--radius); background: var(--bg-elevated);
  transition: border-color .15s, box-shadow .15s, transform .15s;
}
.rel-card:hover { border-color: var(--brand); box-shadow: var(--shadow); text-decoration: none; transform: translateY(-1px); }
.rel-card .rc-title { font-size: .92rem; font-weight: 650; color: var(--text); line-height: 1.4; }
.rel-card .rc-desc {
  font-size: .82rem; color: var(--text-muted); line-height: 1.55;
  display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical;
  line-clamp: 3; overflow: hidden;
}

/* -------------------------------------------------------------------- toc */
.toc {
  position: sticky; top: var(--nav-h);
  height: calc(100vh - var(--nav-h));
  overflow-y: auto; overscroll-behavior: contain;
  padding: 2.5rem 1.5rem 3rem .5rem;
  font-size: .82rem;
}
.toc-title {
  font-size: .76rem; font-weight: 700; text-transform: uppercase;
  letter-spacing: .06em; color: var(--text-faint); margin: 0 0 .7rem;
}
.toc ul { list-style: none; margin: 0; padding: 0; border-left: 1px solid var(--border); }
.toc li a {
  display: block; padding: .28rem 0 .28rem .8rem;
  margin-left: -1px; border-left: 2px solid transparent;
  color: var(--text-muted); line-height: 1.5;
}
.toc li a:hover { color: var(--text); text-decoration: none; }
.toc li a.active { color: var(--brand); border-left-color: var(--brand); font-weight: 600; }
.toc li.d3 a { padding-left: 1.6rem; font-size: .78rem; }

.toc-extra { margin-top: 1.5rem; padding-top: 1rem; border-top: 1px solid var(--border); }
.toc-extra a {
  display: flex; align-items: center; gap: .45rem;
  color: var(--text-muted); padding: .22rem 0; font-size: .8rem;
}
.toc-extra a:hover { color: var(--brand); text-decoration: none; }
.toc-extra svg { width: 14px; height: 14px; flex-shrink: 0; }

/* ------------------------------------------------------------------ home */
.home { padding: 3rem 3rem 5rem; }
.home-inner { max-width: 62rem; margin: 0 auto; }
.home-hero { margin-bottom: 2.5rem; }
.home-hero h1 {
  font-size: 2.75rem; line-height: 1.12; font-weight: 700;
  letter-spacing: -.03em; margin: 0 0 .85rem;
}
.home-hero p { font-size: 1.15rem; color: var(--text-muted); margin: 0; max-width: 42rem; }

.home-search { margin: 2rem 0 3rem; max-width: 34rem; }
.home-search .search-trigger { width: 100%; height: 46px; font-size: .95rem; }
.home-search .search-trigger svg { width: 17px; height: 17px; }

.cat-block { margin-bottom: 2.75rem; }
.cat-head { display: flex; align-items: center; gap: .6rem; margin-bottom: 1rem; }
.cat-head h2 { font-size: 1.2rem; font-weight: 650; margin: 0; letter-spacing: -.015em; }
.cat-head h2 a { color: inherit; }
.cat-head h2 a:hover { color: var(--brand); text-decoration: none; }
.cat-all {
  margin-left: auto; font-size: .82rem; font-weight: 550;
  color: var(--text-muted); white-space: nowrap;
}
.cat-all:hover { color: var(--brand); text-decoration: none; }
.cat-swatch {
  display: inline-block; width: .6em; height: .6em; border-radius: 50%;
  margin-right: .45em; vertical-align: baseline;
}
.cat-count { font-size: .78rem; color: var(--text-faint); }

.card-list { display: grid; gap: 1rem; grid-template-columns: repeat(auto-fill, minmax(19rem, 1fr)); }
.doc-card {
  display: flex; flex-direction: column;
  border: 1px solid var(--border); border-radius: var(--radius-lg);
  background: var(--bg-elevated); overflow: hidden;
  transition: border-color .15s, box-shadow .15s, transform .15s;
}
.doc-card:hover { border-color: var(--brand); box-shadow: var(--shadow-lg); text-decoration: none; transform: translateY(-2px); }
.doc-card img {
  width: 100%; aspect-ratio: 16/9; object-fit: cover; display: block;
  background: var(--bg-sunken); border-bottom: 1px solid var(--border);
}
.doc-card-body { padding: 1rem 1.1rem 1.15rem; display: flex; flex-direction: column; gap: .5rem; }
.doc-card .dc-title { font-size: 1rem; font-weight: 650; color: var(--text); line-height: 1.4; }
.doc-card .dc-desc {
  font-size: .85rem; color: var(--text-muted); line-height: 1.6;
  display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical;
  line-clamp: 3; overflow: hidden;
}

/* --------------------------------------------------------------- search */
.search-overlay {
  position: fixed; inset: 0; z-index: 100;
  background: rgba(12, 14, 17, .45);
  backdrop-filter: blur(3px);
  display: none; align-items: flex-start; justify-content: center;
  padding: 8vh 1rem 2rem;
}
.search-overlay.open { display: flex; }

.search-modal {
  width: min(40rem, 100%); max-height: 70vh;
  display: flex; flex-direction: column;
  background: var(--bg-elevated); border: 1px solid var(--border);
  border-radius: var(--radius-lg); box-shadow: var(--shadow-lg); overflow: hidden;
}
.search-head { display: flex; align-items: center; gap: .6rem; padding: .85rem 1rem; border-bottom: 1px solid var(--border); }
.search-head > svg { width: 18px; height: 18px; color: var(--text-faint); flex-shrink: 0; }
.search-head input {
  flex: 1; font: inherit; font-size: 1rem; color: var(--text);
  background: none; border: none; outline: none;
}
.search-head input::placeholder { color: var(--text-faint); }
.search-head input::-webkit-search-decoration,
.search-head input::-webkit-search-cancel-button,
.search-head input::-webkit-search-results-button { -webkit-appearance: none; appearance: none; }
.search-esc {
  font-size: .7rem; font-weight: 600; color: var(--text-faint);
  border: 1px solid var(--border); border-radius: 5px; padding: .12rem .4rem;
}
.search-results { overflow-y: auto; padding: .5rem; }
.sr-item {
  display: block; padding: .6rem .75rem; border-radius: var(--radius-sm);
  border: 1px solid transparent;
}
.sr-item:hover, .sr-item.sel { background: var(--bg-subtle); border-color: var(--border); text-decoration: none; }
.sr-title { font-size: .92rem; font-weight: 600; color: var(--text); }
.sr-sec { font-size: .72rem; color: var(--text-faint); margin-bottom: .1rem; }
.sr-snip { font-size: .8rem; color: var(--text-muted); line-height: 1.5; margin-top: .15rem; }
.sr-snip mark, .sr-title mark {
  background: color-mix(in srgb, var(--brand) 25%, transparent);
  color: inherit; padding: 0 .1em; border-radius: 3px;
}
.sr-empty { padding: 2rem 1rem; text-align: center; color: var(--text-faint); font-size: .9rem; }
.search-foot {
  display: flex; gap: 1rem; padding: .55rem 1rem;
  border-top: 1px solid var(--border); background: var(--bg-subtle);
  font-size: .72rem; color: var(--text-faint);
}

/* --------------------------------------------------------------- 404 */
.notfound { padding: 6rem 2rem; text-align: center; }
.notfound h1 { font-size: 3rem; margin: 0 0 .5rem; letter-spacing: -.03em; }
.notfound p { color: var(--text-muted); font-size: 1.05rem; }

/* ---------------------------------------------------------- responsive */
@media (max-width: 1279px) {
  .layout { grid-template-columns: var(--sidebar-w) minmax(0, 1fr); }
  .toc { display: none; }
  .content { padding: 2.5rem 2.25rem 5rem; }
}

@media (max-width: 1023px) {
  .layout { grid-template-columns: minmax(0, 1fr); }
  .menu-btn { display: inline-flex; }
  .nav-links { display: none; }
  .search-trigger { min-width: 0; width: 36px; padding: 0; justify-content: center; }
  .search-trigger .st-label, .search-trigger kbd { display: none; }

  .sidebar {
    position: fixed; top: var(--nav-h); left: 0; z-index: 55;
    width: min(20rem, 82vw); height: calc(100vh - var(--nav-h));
    background: var(--bg); border-right: 1px solid var(--border);
    transform: translateX(-102%); transition: transform .22s ease;
    box-shadow: var(--shadow-lg);
  }
  .sidebar.open { transform: translateX(0); }
  .scrim {
    position: fixed; inset: var(--nav-h) 0 0; z-index: 54;
    background: rgba(12,14,17,.4); display: none;
  }
  .scrim.open { display: block; }

  .content { padding: 2rem 1.5rem 4rem; }
  .home { padding: 2.25rem 1.5rem 4rem; }
  .page-title { font-size: 2rem; }
  .home-hero h1 { font-size: 2.15rem; }
}

@media (max-width: 640px) {
  .navbar { padding: 0 1rem; gap: .5rem; }
  .nav-cta { display: none; }
  .nav-brand .brand-label, .nav-brand .brand-divider { display: none; }
  .content { padding: 1.5rem 1rem 3rem; }
  .home { padding: 1.75rem 1rem 3rem; }
  .page-title { font-size: 1.7rem; }
  .home-hero h1 { font-size: 1.85rem; }
  .prevnext { grid-template-columns: 1fr; }
  .card-list { grid-template-columns: 1fr; }
  .prose .anchor { display: none; }
  .search-overlay { padding: 4vh .75rem 1rem; }
}

@media print {
  .navbar, .sidebar, .toc, .page-foot, .search-overlay, .scrim { display: none !important; }
  .layout { display: block; }
  .content { padding: 0; }
  body { font-size: 11pt; }
}