/* =====================================================================
   Fence API — Client Integration Guide
   Documentation styles. Built on tokens.css (Fence Design System).
   ===================================================================== */

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; }

::selection { background: var(--fence-gold); color: var(--fence-black); }

/* thin warm scrollbar */
* { scrollbar-width: thin; scrollbar-color: var(--border-2) transparent; }
*::-webkit-scrollbar { width: 9px; height: 9px; }
*::-webkit-scrollbar-thumb { background: var(--border-2); border-radius: 999px; border: 2px solid var(--bg-page); }
*::-webkit-scrollbar-track { background: transparent; }

a { color: inherit; text-decoration: none; }

/* =====================================================================
   Top bar
   ===================================================================== */
.topbar {
  position: sticky; top: 0; z-index: 60;
  height: 64px;
  display: flex; align-items: center; gap: var(--s-5);
  padding: 0 var(--s-6);
  background: rgba(255, 252, 248, 0.86);
  backdrop-filter: saturate(1.1) blur(12px);
  -webkit-backdrop-filter: saturate(1.1) blur(12px);
  border-bottom: 1px solid var(--border-1);
}
.topbar-brand { display: flex; align-items: center; gap: var(--s-3); }
.topbar-brand img { height: 22px; width: auto; display: block; }
.topbar-brand .div { width: 1px; height: 22px; background: var(--border-2); }
.topbar-brand .doc-name {
  font-size: var(--fs-sm); color: var(--fg-2); font-weight: var(--w-medium);
  letter-spacing: var(--tracking-tight); white-space: nowrap;
}
.ver-pill {
  font-family: var(--font-mono); font-size: 11px; font-weight: var(--w-medium);
  color: #8B5E2F; background: var(--fence-gold-accent);
  border: 1px solid rgba(222,180,131,0.5);
  padding: 2px 8px; border-radius: var(--r-pill); letter-spacing: 0.02em;
}
.topbar-spacer { flex: 1; }

/* environment toggle */
.env-toggle {
  display: inline-flex; align-items: center;
  background: rgba(27,27,27,0.04);
  border: 1px solid var(--border-1);
  border-radius: var(--r-pill); padding: 3px;
}
.env-toggle button {
  font-family: inherit; font-size: var(--fs-sm); font-weight: var(--w-medium);
  color: var(--fg-3); background: transparent; border: none; cursor: pointer;
  padding: 5px 14px; border-radius: var(--r-pill);
  display: inline-flex; align-items: center; gap: 7px;
  transition: color var(--dur-fast) var(--ease-out);
}
.env-toggle button .dot { width: 6px; height: 6px; border-radius: 999px; background: currentColor; opacity: 0.55; }
.env-toggle button[aria-pressed="true"] {
  color: var(--fg-1); background: var(--bg-elevated); box-shadow: var(--shadow-1);
}
.env-toggle button[data-env="prod"][aria-pressed="true"] .dot { background: var(--fence-green); opacity: 1; }
.env-toggle button[data-env="sandbox"][aria-pressed="true"] .dot { background: var(--fence-gold); opacity: 1; }

.topbar-search {
  display: inline-flex; align-items: center; gap: var(--s-2);
  border: 1px solid var(--border-1); border-radius: var(--r-md);
  background: var(--bg-elevated); padding: 7px 11px;
  width: 240px; font-size: var(--fs-sm); color: var(--fg-3); cursor: text;
  transition: border-color var(--dur-base) var(--ease-out);
}
.topbar-search:focus-within, .topbar-search:hover { border-color: var(--border-2); }
.topbar-search input { border: none; outline: none; background: transparent; font: inherit; color: var(--fg-1); flex: 1; min-width: 0; }
.topbar-search .ic { width: 15px; height: 15px; color: var(--fg-3); }
.topbar-search .kbd {
  font-family: var(--font-mono); font-size: 10px; color: var(--fg-3);
  background: rgba(27,27,27,0.05); border: 1px solid var(--border-1);
  border-radius: 4px; padding: 1px 5px;
}
.topbar-burger { display: none; }

/* =====================================================================
   Layout grid
   ===================================================================== */
.layout {
  display: grid;
  grid-template-columns: 288px minmax(0, 1fr) 248px;
  align-items: start;
  max-width: 1640px; margin: 0 auto;
}

/* =====================================================================
   Left navigation
   ===================================================================== */
.nav {
  position: sticky; top: 64px;
  height: calc(100vh - 64px);
  overflow-y: auto;
  padding: var(--s-7) var(--s-5) var(--s-8) var(--s-6);
  border-right: 1px solid var(--border-1);
}
.nav-group { margin-bottom: var(--s-6); }
.nav-group-title {
  display: flex; align-items: center; gap: 10px;
  font-size: 10px; font-weight: var(--w-medium);
  letter-spacing: 0.16em; text-transform: uppercase; color: var(--fg-3);
  margin: 0 0 var(--s-3) 10px;
}
.nav-group-title .n {
  font-family: var(--font-mono); font-size: 10px;
  color: #8B5E2F; background: var(--fence-gold-accent);
  width: 18px; height: 18px; border-radius: var(--r-sm);
  display: grid; place-items: center; letter-spacing: 0;
}
.nav-link {
  display: block; position: relative;
  padding: 6px 10px 6px 11px;
  font-size: var(--fs-sm); color: var(--fg-2); line-height: 1.4;
  border-radius: var(--r-sm);
  transition: color var(--dur-fast) var(--ease-out), background var(--dur-fast) var(--ease-out);
}
.nav-link:hover { color: var(--fg-1); background: rgba(27,27,27,0.035); }
.nav-link.sub { padding-left: 24px; font-size: 13px; color: var(--fg-3); }
.nav-link.sub::before {
  content: ""; position: absolute; left: 13px; top: 0; bottom: 0; width: 1px;
  background: var(--border-1);
}
.nav-link.active {
  color: var(--fg-1); font-weight: var(--w-medium);
  background: var(--bg-tinted);
}
.nav-link.sub.active { background: transparent; }
.nav-link.sub.active::before { background: var(--fence-gold); width: 2px; left: 13px; }

/* =====================================================================
   Main content column
   ===================================================================== */
.content {
  padding: var(--s-8) var(--s-9) var(--s-10);
  min-width: 0;
}
@media (max-width: 1400px) { .content { padding: var(--s-8) var(--s-8) var(--s-10); } }

.content section { scroll-margin-top: 88px; }

/* Hero */
.hero { position: relative; margin-bottom: var(--s-9); }
.hero .eyebrow { margin-bottom: var(--s-4); }
.hero h1 {
  font-size: var(--fs-3xl); font-weight: var(--w-bold);
  letter-spacing: var(--tracking-display); line-height: 1.04;
  margin: 0 0 var(--s-5); max-width: 17ch;
}
.hero .lede {
  font-size: var(--fs-md); color: var(--fg-2); line-height: var(--lh-body);
  max-width: 62ch; margin: 0 0 var(--s-6);
}
.hero-meta { display: flex; flex-wrap: wrap; gap: var(--s-3); }
.meta-chip {
  display: inline-flex; align-items: center; gap: 9px;
  border: 1px solid var(--border-1); background: var(--bg-elevated);
  border-radius: var(--r-md); padding: 9px 14px; box-shadow: var(--shadow-card);
}
.meta-chip .k { font-size: 10px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--fg-3); font-weight: var(--w-medium); }
.meta-chip .v { font-size: var(--fs-sm); color: var(--fg-1); font-weight: var(--w-medium); }
.meta-chip .v.mono { font-family: var(--font-mono); }
.hero-leaf {
  position: absolute; top: -8px; right: 0; width: 116px; height: 116px;
  background: var(--fence-gold-accent); border-radius: 0 50% 0 0; opacity: 0.6; z-index: -1;
}
.hero-leaf::after {
  content: ""; position: absolute; inset: 26px 26px auto auto; width: 64px; height: 64px;
  background: var(--fence-gold); opacity: 0.4; border-radius: 0 50% 0 0;
}

/* Headings */
h2.sec {
  font-size: var(--fs-2xl); font-weight: var(--w-bold);
  letter-spacing: var(--tracking-tight); line-height: 1.1;
  margin: 0 0 var(--s-2); display: flex; align-items: baseline; gap: 14px;
  scroll-margin-top: 88px;
}
h2.sec .num {
  font-family: var(--font-mono); font-size: var(--fs-lg); font-weight: var(--w-regular);
  color: var(--fence-gold); letter-spacing: 0;
}
h3.sub {
  font-size: var(--fs-xl); font-weight: var(--w-semibold);
  letter-spacing: var(--tracking-tight); line-height: 1.2;
  margin: var(--s-8) 0 var(--s-4); scroll-margin-top: 88px;
}
h4.subsub {
  font-size: var(--fs-md); font-weight: var(--w-medium);
  margin: var(--s-7) 0 var(--s-3); color: var(--fg-1); scroll-margin-top: 88px;
}
.sec-divider { border: none; border-top: 1px solid var(--border-1); margin: var(--s-10) 0 var(--s-8); }
.sec-intro { font-size: var(--fs-md); color: var(--fg-2); line-height: var(--lh-body); margin: 0 0 var(--s-6); max-width: 70ch; }

.content p { font-size: var(--fs-base); color: var(--fg-1); line-height: var(--lh-body); margin: 0 0 var(--s-4); max-width: 72ch; }
.content p.muted { color: var(--fg-2); }
.content a.inline { color: #8B5E2F; border-bottom: 1px solid rgba(222,180,131,0.5); transition: border-color var(--dur-fast); }
.content a.inline:hover { border-color: #8B5E2F; }

/* inline code */
code.tok {
  font-family: var(--font-mono); font-size: 0.86em;
  background: rgba(27,27,27,0.05); border: 1px solid var(--border-1);
  border-radius: var(--r-sm); padding: 1px 6px; color: #5a4632;
  white-space: nowrap;
}

/* bullet lists */
ul.fence-list, ol.fence-list { margin: 0 0 var(--s-5); padding: 0; list-style: none; max-width: 72ch; }
ul.fence-list li, ol.fence-list li {
  position: relative; padding-left: 26px; margin-bottom: var(--s-3);
  font-size: var(--fs-base); line-height: var(--lh-body); color: var(--fg-1);
}
ul.fence-list li::before {
  content: ""; position: absolute; left: 4px; top: 9px; width: 7px; height: 7px;
  background: var(--fence-gold); border-radius: 0 50% 0 0;
}
ol.fence-list { counter-reset: step; }
ol.fence-list li { padding-left: 38px; margin-bottom: var(--s-4); }
ol.fence-list li::before {
  counter-increment: step; content: counter(step);
  position: absolute; left: 0; top: 1px;
  width: 24px; height: 24px; border-radius: var(--r-sm);
  background: var(--fence-black); color: var(--fence-white);
  font-family: var(--font-mono); font-size: 12px; font-weight: var(--w-medium);
  display: grid; place-items: center;
}
.content li code.tok { white-space: normal; }

/* =====================================================================
   Endpoint header (method + path)
   ===================================================================== */
.endpoint {
  display: flex; align-items: center; gap: var(--s-3);
  background: var(--bg-elevated); border: 1px solid var(--border-2);
  border-radius: var(--r-md); padding: 10px 12px; margin: var(--s-5) 0 var(--s-4);
  box-shadow: var(--shadow-card); overflow-x: auto;
}
.method {
  font-family: var(--font-mono); font-size: 12px; font-weight: var(--w-medium);
  letter-spacing: 0.06em; padding: 4px 9px; border-radius: var(--r-sm);
  flex: none; line-height: 1;
}
.method.post { color: #8B5E2F; background: var(--fence-gold-accent); }
.method.get  { color: #41684A; background: var(--fence-green-accent); }
.method.put  { color: #41607A; background: var(--fence-blue-accent); }
.method.delete { color: var(--danger); background: var(--danger-accent); }
.endpoint .path {
  font-family: var(--font-mono); font-size: var(--fs-sm); color: var(--fg-1);
  white-space: nowrap; letter-spacing: -0.01em;
}
.endpoint .path .base { color: var(--fg-3); }
.endpoint .path .param { color: #8B5E2F; }
.endpoint .path .q { color: var(--fence-green); }
.endpoint .copy-ep { margin-left: auto; flex: none; }

/* =====================================================================
   Code blocks
   ===================================================================== */
.code {
  position: relative; margin: var(--s-4) 0 var(--s-6);
  background: var(--bg-dark); border-radius: var(--r-lg);
  border: 1px solid rgba(27,27,27,0.4); overflow: hidden;
  box-shadow: var(--shadow-2);
}
.code-head {
  display: flex; align-items: center; gap: var(--s-3);
  padding: 9px 14px; border-bottom: 1px solid var(--border-on-dark-1);
}
.code-head .lang {
  font-family: var(--font-mono); font-size: 10px; letter-spacing: 0.14em;
  text-transform: uppercase; color: var(--fg-on-dark-3); font-weight: var(--w-medium);
}
.code-head .file { font-family: var(--font-mono); font-size: 12px; color: var(--fg-on-dark-2); }
.code-head .resp {
  font-family: var(--font-mono); font-size: 11px; color: var(--fence-green);
  display: inline-flex; align-items: center; gap: 6px;
}
.code-head .resp .dot { width: 6px; height: 6px; border-radius: 999px; background: currentColor; }
.code-head .copy { margin-left: auto; }
.code pre {
  margin: 0; padding: var(--s-5) var(--s-5); overflow-x: auto;
  font-family: var(--font-mono); font-size: 13px; line-height: 1.65;
  color: var(--fg-on-dark); tab-size: 2;
}
.code pre code { font-family: inherit; white-space: pre; }

/* syntax tokens (set by docs.js) */
.t-key   { color: #DEB483; }
.t-str   { color: #A8C3A0; }
.t-num   { color: #C9B0E0; }
.t-bool  { color: #A3B8C8; }
.t-null  { color: var(--fg-on-dark-3); }
.t-punct { color: var(--fg-on-dark-2); }
.t-method{ color: #DEB483; font-weight: var(--w-medium); }
.t-path  { color: #FFFCF8; }
.t-pp    { color: #A8C3A0; }
.t-header{ color: #A3B8C8; }
.t-hval  { color: var(--fg-on-dark-2); }
.t-comment { color: var(--fg-on-dark-3); font-style: italic; }

/* copy button (shared) */
.copy {
  font-family: var(--font-mono); font-size: 10px; letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--fg-on-dark-2); background: rgba(255,252,248,0.06);
  border: 1px solid var(--border-on-dark-1); border-radius: var(--r-sm);
  padding: 4px 9px; cursor: pointer; display: inline-flex; align-items: center; gap: 6px;
  transition: all var(--dur-fast) var(--ease-out); flex: none;
}
.copy:hover { color: var(--fg-on-dark); border-color: var(--border-on-dark-2); background: rgba(255,252,248,0.1); }
.copy .ic { width: 13px; height: 13px; }
.copy.light { color: var(--fg-3); background: rgba(27,27,27,0.03); border-color: var(--border-1); }
.copy.light:hover { color: var(--fg-1); border-color: var(--border-2); background: rgba(27,27,27,0.06); }
.copy.copied { color: var(--fence-green); border-color: rgba(107,143,113,0.5); }

/* =====================================================================
   Tables
   ===================================================================== */
.table-wrap {
  margin: var(--s-4) 0 var(--s-6); border: 1px solid var(--border-1);
  border-radius: var(--r-lg); overflow: hidden; background: var(--bg-elevated);
  box-shadow: var(--shadow-card);
}
table.fence-table { width: 100%; border-collapse: collapse; font-size: var(--fs-sm); }
.fence-table th {
  text-align: left; font-size: 10px; letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--fg-3); font-weight: var(--w-medium);
  padding: 11px 18px; border-bottom: 1px solid var(--border-1); background: var(--bg-tinted);
  white-space: nowrap;
}
.fence-table td {
  padding: 14px 18px; border-bottom: 1px solid var(--border-1);
  vertical-align: top; color: var(--fg-1); line-height: var(--lh-snug);
}
.fence-table tr:last-child td { border-bottom: none; }
.fence-table tbody tr { transition: background var(--dur-fast) var(--ease-out); }
.fence-table tbody tr:hover td { background: rgba(27,27,27,0.018); }
.fence-table td.mono, .fence-table td .mono { font-family: var(--font-mono); font-size: 12.5px; color: #5a4632; }
.fence-table td .desc { color: var(--fg-2); }
.fence-table td.nowrap { white-space: nowrap; }
.req {
  font-size: 10px; font-weight: var(--w-medium); letter-spacing: 0.06em; text-transform: uppercase;
  padding: 2px 8px; border-radius: var(--r-pill);
}
.req.yes { color: #8B5E2F; background: var(--fence-gold-accent); }
.req.no { color: var(--fg-3); background: rgba(27,27,27,0.04); }
.type-pill {
  font-family: var(--font-mono); font-size: 11.5px; color: var(--fg-2);
  background: rgba(27,27,27,0.04); border: 1px solid var(--border-1);
  border-radius: var(--r-sm); padding: 1px 7px; white-space: nowrap;
}

/* status badge in tables */
.sbadge {
  display: inline-flex; align-items: center; gap: 7px;
  font-family: var(--font-mono); font-size: 11.5px; font-weight: var(--w-medium);
  padding: 3px 10px; border-radius: var(--r-pill); white-space: nowrap; letter-spacing: 0;
}
.sbadge .dot { width: 6px; height: 6px; border-radius: 999px; background: currentColor; }
.sbadge.ok { color: #41684A; background: var(--fence-green-accent); }
.sbadge.warn { color: #8B5E2F; background: var(--fence-gold-accent); }
.sbadge.info { color: #41607A; background: var(--fence-blue-accent); }
.sbadge.danger { color: var(--danger); background: var(--danger-accent); }
.sbadge.neutral { color: var(--fg-2); background: rgba(27,27,27,0.05); }

/* http code */
.httpcode { font-family: var(--font-mono); font-weight: var(--w-medium); font-size: 13px; }
.httpcode.s2 { color: #41684A; }
.httpcode.s4 { color: #8B5E2F; }
.httpcode.s5 { color: var(--danger); }

/* =====================================================================
   Callouts
   ===================================================================== */
.callout {
  display: flex; gap: var(--s-3); margin: var(--s-5) 0;
  border: 1px solid var(--border-1); border-radius: var(--r-lg);
  padding: var(--s-4) var(--s-5); background: var(--bg-elevated);
  position: relative; overflow: hidden; max-width: 78ch;
}
.callout .ic-wrap {
  flex: none; width: 30px; height: 30px; border-radius: var(--r-sm);
  display: grid; place-items: center;
}
.callout .ic-wrap .ic { width: 17px; height: 17px; }
.callout .body { font-size: var(--fs-sm); line-height: var(--lh-body); color: var(--fg-1); }
.callout .body strong { font-weight: var(--w-medium); }
.callout.tip { background: var(--fence-gold-accent); border-color: rgba(222,180,131,0.5); }
.callout.tip .ic-wrap { background: var(--fence-gold); color: var(--fence-black); }
.callout.note { background: var(--fence-blue-accent); border-color: rgba(163,184,200,0.5); }
.callout.note .ic-wrap { background: var(--fence-blue); color: var(--fence-black); }
.callout.warn { background: var(--fence-gold-accent); border-color: rgba(222,180,131,0.6); }
.callout.warn .ic-wrap { background: #8B5E2F; color: var(--fence-white); }

/* =====================================================================
   Approach / state cards
   ===================================================================== */
.card-grid { display: grid; grid-template-columns: 1fr 1fr; gap: var(--s-4); margin: var(--s-5) 0 var(--s-6); }
.fcard {
  border: 1px solid var(--border-1); border-radius: var(--r-lg);
  background: var(--bg-elevated); padding: var(--s-5); box-shadow: var(--shadow-card);
  position: relative; overflow: hidden;
}
.fcard .leaf-bg { position: absolute; right: -22px; bottom: -22px; width: 76px; height: 76px; border-radius: 0 50% 0 0; background: var(--fence-gold-accent); opacity: 0.5; }
.fcard > * { position: relative; }
.fcard .tag { font-size: 10px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--fg-3); font-weight: var(--w-medium); margin-bottom: var(--s-2); }
.fcard h5 { margin: 0 0 var(--s-2); font-size: var(--fs-md); font-weight: var(--w-medium); }
.fcard p { font-size: var(--fs-sm); color: var(--fg-2); margin: 0 0 var(--s-3); line-height: var(--lh-snug); }
.fcard .ep-mini { font-family: var(--font-mono); font-size: 12px; color: #5a4632; background: rgba(27,27,27,0.04); border-radius: var(--r-sm); padding: 6px 9px; display: inline-block; }

/* =====================================================================
   Currency grid
   ===================================================================== */
.cur-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(58px, 1fr)); gap: 8px; margin: var(--s-4) 0 var(--s-3); max-width: 78ch; }
.cur {
  font-family: var(--font-mono); font-size: 12.5px; text-align: center;
  color: var(--fg-2); background: var(--bg-elevated); border: 1px solid var(--border-1);
  border-radius: var(--r-sm); padding: 7px 4px; transition: all var(--dur-fast) var(--ease-out);
}
.cur:hover { color: var(--fg-1); border-color: var(--border-2); background: var(--bg-tinted); }
.cur.hl { color: #8B5E2F; background: var(--fence-gold-accent); border-color: rgba(222,180,131,0.5); font-weight: var(--w-medium); }

/* =====================================================================
   Schema blocks
   ===================================================================== */
.schema {
  margin: var(--s-4) 0 var(--s-6); border: 1px solid var(--border-1);
  border-radius: var(--r-lg); overflow: hidden; background: var(--bg-elevated); box-shadow: var(--shadow-card);
}
.schema-head {
  padding: 11px 16px; border-bottom: 1px solid var(--border-1); background: var(--bg-tinted);
  font-family: var(--font-mono); font-size: 13px; color: var(--fg-1); font-weight: var(--w-medium);
  display: flex; align-items: center; gap: 9px;
}
.schema-head .ic { width: 15px; height: 15px; color: var(--fence-gold); }
.schema-body { padding: 6px 0; }
.field { display: flex; gap: var(--s-4); padding: 10px 18px; align-items: baseline; border-bottom: 1px solid var(--border-1); }
.field:last-child { border-bottom: none; }
.field .name { font-family: var(--font-mono); font-size: 13px; color: var(--fg-1); flex: none; min-width: 168px; }
.field .meta { display: flex; flex-direction: column; gap: 3px; }
.field .ftype { font-family: var(--font-mono); font-size: 12px; color: var(--fence-green); }
.field .fnote { font-size: 12.5px; color: var(--fg-3); }
.field .badge-req { font-size: 9px; color: #8B5E2F; letter-spacing: 0.08em; text-transform: uppercase; }

/* =====================================================================
   Right rail — on this page
   ===================================================================== */
.toc {
  position: sticky; top: 64px; height: calc(100vh - 64px); overflow-y: auto;
  padding: var(--s-8) var(--s-6) var(--s-8) var(--s-4);
}
.toc-title { font-size: 10px; letter-spacing: 0.16em; text-transform: uppercase; color: var(--fg-3); font-weight: var(--w-medium); margin: 0 0 var(--s-4); }
.toc a {
  display: block; font-size: 13px; color: var(--fg-3); line-height: 1.4;
  padding: 5px 0 5px 14px; border-left: 2px solid var(--border-1);
  transition: color var(--dur-fast) var(--ease-out), border-color var(--dur-fast) var(--ease-out);
}
.toc a:hover { color: var(--fg-1); }
.toc a.active { color: var(--fg-1); border-left-color: var(--fence-gold); font-weight: var(--w-medium); }
.toc a.deep { padding-left: 26px; font-size: 12.5px; }

.toc-foot { margin-top: var(--s-6); padding-top: var(--s-5); border-top: 1px solid var(--border-1); }
.toc-foot a { display: inline-flex; align-items: center; gap: 7px; font-size: 13px; color: var(--fg-2); border: none; padding: 0; }
.toc-foot a:hover { color: var(--fg-1); }
.toc-foot a .ic { width: 14px; height: 14px; }

/* =====================================================================
   Footer
   ===================================================================== */
.foot {
  grid-column: 1 / -1; border-top: 1px solid var(--border-1);
  background: var(--bg-dark); color: var(--fg-on-dark);
  padding: var(--s-8) var(--s-9);
  display: flex; align-items: center; gap: var(--s-5); flex-wrap: wrap;
}
.foot img { height: 24px; }
.foot .txt { font-size: var(--fs-sm); color: var(--fg-on-dark-2); line-height: var(--lh-body); }
.foot .txt b { color: var(--fg-on-dark); font-weight: var(--w-medium); }
.foot .spacer { flex: 1; }
.foot .copy-mark { font-size: var(--fs-sm); color: var(--fg-on-dark-3); white-space: nowrap; }

/* =====================================================================
   Responsive
   ===================================================================== */
@media (max-width: 1180px) {
  .layout { grid-template-columns: 264px minmax(0,1fr); }
  .toc { display: none; }
}
@media (max-width: 880px) {
  .layout { grid-template-columns: 1fr; }
  .nav {
    position: fixed; top: 64px; left: 0; bottom: 0; width: 300px; z-index: 50;
    background: var(--bg-page); transform: translateX(-100%);
    transition: transform var(--dur-base) var(--ease-out); box-shadow: var(--shadow-4);
  }
  body.nav-open .nav { transform: translateX(0); }
  .nav-scrim { position: fixed; inset: 64px 0 0 0; background: rgba(27,27,27,0.3); z-index: 49; opacity: 0; pointer-events: none; transition: opacity var(--dur-base); }
  body.nav-open .nav-scrim { opacity: 1; pointer-events: auto; }
  .topbar-burger { display: grid; place-items: center; width: 36px; height: 36px; border: 1px solid var(--border-1); border-radius: var(--r-md); background: var(--bg-elevated); cursor: pointer; color: var(--fg-1); }
  .topbar-search { display: none; }
  .content { padding: var(--s-7) var(--s-5) var(--s-9); }
  .card-grid { grid-template-columns: 1fr; }
  .topbar-brand .doc-name { display: none; }
}
@media (min-width: 881px) { .nav-scrim { display: none; } }

/* (entrance animation intentionally omitted — content is always visible) */