/* =============================================================
   Theory Cloud Docs — GitHub Pages theme
   Extends Theory Cloud DS tokens with doc-specific layout.
   ============================================================= */

@import url("./colors_and_type.css");

* { box-sizing: border-box; }

html, body { margin: 0; padding: 0; }
html { background: var(--tc-bg); }
body {
  background: var(--tc-bg);
  color: var(--tc-fg);
  font-family: var(--tc-font-sans);
  font-size: var(--tc-fs-body);
  line-height: var(--tc-lh-body);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

a { color: inherit; text-decoration: none; }
button { font-family: inherit; background: none; border: none; color: inherit; cursor: pointer; }
input, textarea, select { font-family: inherit; color: inherit; }

::selection { background: rgba(46,167,255,0.32); color: var(--tc-ice-white); }

/* Scrollbar */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--tc-outline-variant); border-radius: 999px; }
::-webkit-scrollbar-thumb:hover { background: var(--tc-steel); }

/* =============================================================
   APP SHELL
   ============================================================= */
.docs-app {
  min-height: 100vh;
  min-width: 0;
  display: grid;
  grid-template-rows: 56px 1fr;
  background:
    radial-gradient(1200px 600px at 14% -10%, rgba(46,167,255,0.06), transparent 70%),
    radial-gradient(900px 500px at 100% 30%, rgba(122,92,255,0.05), transparent 70%),
    var(--tc-bg);
}
[data-surface="mcp"].docs-app {
  background:
    radial-gradient(1200px 600px at 86% -10%, rgba(122,92,255,0.10), transparent 70%),
    radial-gradient(700px 400px at 0% 110%, rgba(46,167,255,0.04), transparent 70%),
    var(--tc-bg);
}
[data-surface="auth"].docs-app {
  background:
    radial-gradient(1400px 700px at 50% 30%, rgba(111,125,149,0.06), transparent 70%),
    var(--tc-bg);
}

/* =============================================================
   PLATFORM HEADER
   ============================================================= */
.docs-header {
  height: 56px;
  min-width: 0;
  display: flex; align-items: center; gap: 16px;
  padding: 0 24px;
  border-bottom: 1px solid var(--tc-outline-variant);
  background: rgba(8,18,38,0.78);
  backdrop-filter: blur(10px) saturate(140%);
  -webkit-backdrop-filter: blur(10px) saturate(140%);
  position: sticky; top: 0; z-index: 50;
}
.docs-header > * { min-width: 0; }
.docs-header__brand { flex: 0 0 auto; }
.docs-header__wordmark { white-space: nowrap; }
.docs-header__repo { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; flex: 0 1 auto; }
.docs-header__nav { flex: 0 0 auto; }
.docs-search-trigger { flex: 0 1 280px; min-width: 0; }
.docs-search-trigger .label { min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.docs-version { flex: 0 0 auto; white-space: nowrap; }
.docs-header__brand {
  display: flex; align-items: center; gap: 10px;
  cursor: pointer;
}
.docs-header__brand img { width: 24px; height: 24px; display: block; }
.docs-header__wordmark {
  font-family: var(--tc-font-display);
  font-weight: 500; font-size: 15.5px;
  letter-spacing: -0.012em;
}
.docs-header__divider {
  width: 1px; height: 20px;
  background: var(--tc-outline-variant);
}
.docs-header__repo {
  display: flex; align-items: center; gap: 8px;
  font-family: var(--tc-font-mono);
  font-size: 12.5px;
  color: var(--tc-fg-muted);
}
.docs-header__repo .slash { color: var(--tc-fg-dim); }
.docs-header__repo .name { color: var(--tc-fg); font-weight: 500; }
.docs-header__nav {
  display: flex; align-items: center; gap: 2px;
  margin-left: 8px;
}
.docs-header__nav button {
  font-size: 13px;
  color: var(--tc-fg-muted);
  padding: 6px 12px;
  border-radius: var(--tc-radius-sm);
  font-weight: var(--tc-w-medium);
  transition: background var(--tc-dur-fast) var(--tc-ease-out), color var(--tc-dur-fast);
}
.docs-header__nav button:hover { color: var(--tc-fg); background: var(--tc-surface-2); }
.docs-header__nav button.active { color: var(--tc-fg); background: var(--tc-surface-2); }
.docs-header__spacer { flex: 1; }
.docs-header__right { display: flex; align-items: center; gap: 12px; }

/* Search trigger */
.docs-search-trigger {
  display: flex; align-items: center; gap: 10px;
  background: var(--tc-surface-2);
  border: 1px solid var(--tc-outline-variant);
  border-radius: var(--tc-radius-md);
  padding: 6px 10px 6px 12px;
  width: 280px;
  font-size: 13px;
  color: var(--tc-fg-dim);
  box-shadow: var(--tc-inner-edge);
  transition: border-color var(--tc-dur-fast) var(--tc-ease-out);
}
.docs-search-trigger:hover { border-color: var(--tc-steel); }
.docs-search-trigger svg { width: 14px; height: 14px; stroke-width: 1.85; flex: 0 0 auto; }
.docs-search-trigger .label { flex: 1; text-align: left; }
.docs-search-trigger kbd {
  font-family: var(--tc-font-mono);
  font-size: 10.5px;
  color: var(--tc-fg-dim);
  background: var(--tc-surface-3);
  border: 1px solid var(--tc-outline-variant);
  padding: 1px 5px;
  border-radius: var(--tc-radius-xs);
}

/* Version pill */
.docs-version {
  display: inline-flex; align-items: center; gap: 7px;
  font-family: var(--tc-font-mono);
  font-size: 11.5px;
  color: var(--tc-fg-muted);
  background: var(--tc-surface-2);
  border: 1px solid var(--tc-outline-variant);
  padding: 3px 10px 3px 8px;
  border-radius: 999px;
  cursor: pointer;
  transition: border-color var(--tc-dur-fast);
}
.docs-version:hover { border-color: var(--tc-steel); }
.docs-version svg { width: 11px; height: 11px; }
.docs-version .dot { width: 6px; height: 6px; border-radius: 50%; background: #46D397; box-shadow: 0 0 6px rgba(70,211,151,0.55); }

/* Surface chip */
.surface-chip {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 11.5px; font-weight: 600;
  padding: 3px 10px;
  border-radius: 999px;
  border: 1px solid transparent;
  letter-spacing: 0.005em;
}
.surface-chip .dot { width: 6px; height: 6px; border-radius: 50%; }
.surface-chip--core { background: rgba(46,167,255,0.12); color: var(--tc-core-blue-fixed); border-color: rgba(46,167,255,0.32); }
.surface-chip--core .dot { background: var(--tc-core-blue); box-shadow: 0 0 8px rgba(46,167,255,0.55); }
.surface-chip--mcp { background: rgba(122,92,255,0.14); color: var(--tc-violet-fixed); border-color: rgba(122,92,255,0.34); }
.surface-chip--mcp .dot { background: var(--tc-violet-signal); box-shadow: 0 0 8px rgba(122,92,255,0.6); }
.surface-chip--auth { background: rgba(111,125,149,0.18); color: var(--tc-mist); border-color: rgba(111,125,149,0.4); }
.surface-chip--auth .dot { background: var(--tc-steel); }

/* Icon buttons */
.icon-btn {
  width: 32px; height: 32px;
  display: inline-flex; align-items: center; justify-content: center;
  color: var(--tc-fg-muted);
  border-radius: var(--tc-radius-sm);
  transition: background var(--tc-dur-fast) var(--tc-ease-out), color var(--tc-dur-fast);
}
.icon-btn:hover { color: var(--tc-fg); background: var(--tc-surface-2); }
.icon-btn svg { width: 16px; height: 16px; stroke-width: 1.8; }

/* =============================================================
   BODY LAYOUT (sidebar + content + TOC)
   ============================================================= */
.docs-body {
  display: grid;
  grid-template-columns: 280px minmax(0, 1fr) 240px;
  gap: 0;
  max-width: 1480px;
  margin: 0 auto;
  width: 100%;
  min-height: calc(100vh - 56px);
}
.docs-body[data-width="wide"] {
  grid-template-columns: 280px minmax(0, 1fr) 280px;
  max-width: 1680px;
}
.docs-body[data-width="narrow"] {
  grid-template-columns: 280px minmax(0, 1fr) 220px;
  max-width: 1280px;
}

/* =============================================================
   SIDEBAR
   ============================================================= */
.docs-sidebar {
  border-right: 1px solid var(--tc-outline-variant);
  padding: 24px 14px 80px 24px;
  position: sticky;
  top: 56px;
  align-self: start;
  height: calc(100vh - 56px);
  overflow-y: auto;
}
.docs-sidebar__filter {
  display: flex; align-items: center; gap: 8px;
  background: var(--tc-surface-1);
  border: 1px solid var(--tc-outline-variant);
  border-radius: var(--tc-radius-md);
  padding: 7px 10px;
  margin-bottom: 18px;
  box-shadow: var(--tc-inner-edge);
}
.docs-sidebar__filter svg { width: 13px; height: 13px; color: var(--tc-fg-dim); }
.docs-sidebar__filter input {
  background: transparent; border: none; outline: none; flex: 1;
  font-size: 12.5px; color: var(--tc-fg);
}
.docs-sidebar__filter input::placeholder { color: var(--tc-fg-dim); }

.sidebar-group { margin-bottom: 18px; }
.sidebar-group__head {
  display: flex; align-items: center; gap: 8px;
  font-size: 10.5px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--tc-fg-dim);
  padding: 6px 8px;
  margin-bottom: 4px;
  cursor: pointer;
  user-select: none;
  transition: color var(--tc-dur-fast);
}
.sidebar-group__head:hover { color: var(--tc-fg-muted); }
.sidebar-group__head .caret {
  width: 10px; height: 10px;
  transition: transform var(--tc-dur-base) var(--tc-ease-out);
}
.sidebar-group__head.collapsed .caret { transform: rotate(-90deg); }
.sidebar-group__head .count {
  margin-left: auto;
  font-family: var(--tc-font-mono);
  font-size: 10px;
  color: var(--tc-fg-dim);
  background: var(--tc-surface-2);
  border: 1px solid var(--tc-outline-variant);
  padding: 0 6px;
  border-radius: 999px;
  letter-spacing: 0;
  text-transform: none;
}
.sidebar-group__body { display: flex; flex-direction: column; gap: 1px; }
.sidebar-group__body.collapsed { display: none; }

.sidebar-link {
  display: flex; align-items: center; gap: 9px;
  font-size: 13px;
  color: var(--tc-fg-muted);
  padding: 6px 10px 6px 8px;
  border-radius: var(--tc-radius-sm);
  cursor: pointer;
  line-height: 1.3;
  font-weight: var(--tc-w-regular);
  transition: background var(--tc-dur-fast) var(--tc-ease-out), color var(--tc-dur-fast);
  text-align: left;
  width: 100%;
}
.sidebar-link:hover { background: var(--tc-surface-2); color: var(--tc-fg); }
.sidebar-link.active {
  background: var(--tc-surface-2);
  color: var(--tc-fg);
  font-weight: var(--tc-w-medium);
  box-shadow: inset 2px 0 0 var(--tc-accent);
}
.sidebar-link__icon {
  width: 14px; height: 14px;
  color: var(--tc-fg-dim);
  flex: 0 0 auto;
}
.sidebar-link.active .sidebar-link__icon { color: var(--tc-accent); }
.sidebar-link__chip {
  margin-left: auto;
  font-family: var(--tc-font-mono);
  font-size: 9.5px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 1px 5px;
  border-radius: var(--tc-radius-xs);
  border: 1px solid var(--tc-outline-variant);
  color: var(--tc-fg-dim);
  background: var(--tc-surface-1);
}
.sidebar-link__chip[data-tag="new"] { color: var(--tc-core-blue-fixed); border-color: rgba(46,167,255,0.4); background: rgba(46,167,255,0.08); }
.sidebar-link__chip[data-tag="beta"] { color: var(--tc-violet-fixed); border-color: rgba(122,92,255,0.4); background: rgba(122,92,255,0.08); }
.sidebar-link__chip[data-tag="ga"] { color: #46D397; border-color: rgba(70,211,151,0.35); background: rgba(70,211,151,0.07); }

/* =============================================================
   CONTENT
   ============================================================= */
.docs-content {
  padding: 40px 56px 96px;
  min-width: 0;
  max-width: 880px;
  width: 100%;
}
.docs-body[data-density="compact"] .docs-content { padding: 28px 40px 72px; }
.docs-body[data-density="spacious"] .docs-content { padding: 56px 72px 120px; }

/* Breadcrumb */
.doc-breadcrumb {
  display: flex; align-items: center; gap: 6px;
  font-size: 12px;
  color: var(--tc-fg-dim);
  margin-bottom: 18px;
}
.doc-breadcrumb a:hover { color: var(--tc-fg-muted); }
.doc-breadcrumb .sep { opacity: 0.5; }
.doc-breadcrumb .current { color: var(--tc-fg-muted); }

/* Page eyebrow */
.doc-eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  font-weight: 600;
  color: var(--tc-accent);
  margin-bottom: 12px;
}
[data-surface="mcp"] .doc-eyebrow { color: var(--tc-violet-fixed); }

/* Doc meta row (under title) */
.doc-meta {
  display: flex; align-items: center; gap: 16px;
  margin-top: 16px;
  margin-bottom: 32px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--tc-outline-variant);
  font-size: 12.5px;
  color: var(--tc-fg-dim);
  flex-wrap: wrap;
}
.doc-meta__item { display: inline-flex; align-items: center; gap: 6px; }
.doc-meta__item svg { width: 13px; height: 13px; }
.doc-meta__item .mono { font-family: var(--tc-font-mono); color: var(--tc-fg-muted); }

/* Markdown prose */
.prose { color: var(--tc-fg); }
.prose h1 {
  font-family: var(--tc-font-display);
  font-size: var(--tc-fs-h1);
  line-height: var(--tc-lh-h1);
  letter-spacing: var(--tc-ls-h1);
  font-weight: var(--tc-w-semibold);
  margin: 0;
  text-wrap: balance;
}
.prose h2 {
  font-family: var(--tc-font-display);
  font-size: var(--tc-fs-h2);
  line-height: var(--tc-lh-h2);
  letter-spacing: var(--tc-ls-h2);
  font-weight: var(--tc-w-semibold);
  margin: 56px 0 16px;
  padding-top: 8px;
  scroll-margin-top: 80px;
}
.prose h2:first-child { margin-top: 0; padding-top: 0; }
.prose h3 {
  font-family: var(--tc-font-display);
  font-size: var(--tc-fs-h3);
  line-height: var(--tc-lh-h3);
  letter-spacing: var(--tc-ls-h3);
  font-weight: var(--tc-w-medium);
  margin: 36px 0 12px;
  scroll-margin-top: 80px;
}
.prose h4 {
  font-family: var(--tc-font-display);
  font-size: var(--tc-fs-h4);
  font-weight: var(--tc-w-medium);
  margin: 28px 0 8px;
  scroll-margin-top: 80px;
}

.prose h2 .anchor, .prose h3 .anchor, .prose h4 .anchor {
  opacity: 0;
  margin-left: 8px;
  color: var(--tc-fg-dim);
  font-weight: 400;
  font-family: var(--tc-font-mono);
  font-size: 0.7em;
  transition: opacity var(--tc-dur-fast);
}
.prose h2:hover .anchor,
.prose h3:hover .anchor,
.prose h4:hover .anchor { opacity: 1; }
.prose h2 .anchor:hover, .prose h3 .anchor:hover { color: var(--tc-accent); }

.prose p {
  font-size: var(--tc-fs-body-lg);
  line-height: var(--tc-lh-body-lg);
  color: var(--tc-fg-muted);
  margin: 14px 0;
  text-wrap: pretty;
}
.prose p strong { color: var(--tc-fg); font-weight: var(--tc-w-semibold); }
.prose a.inline-link {
  color: var(--tc-core-blue-fixed);
  border-bottom: 1px solid rgba(46,167,255,0.32);
  transition: border-color var(--tc-dur-fast), color var(--tc-dur-fast);
}
[data-surface="mcp"] .prose a.inline-link {
  color: var(--tc-violet-fixed);
  border-bottom-color: rgba(122,92,255,0.32);
}
.prose a.inline-link:hover { border-bottom-color: currentColor; }

.prose ul, .prose ol {
  font-size: var(--tc-fs-body-lg);
  line-height: 1.65;
  color: var(--tc-fg-muted);
  padding-left: 22px;
  margin: 14px 0;
}
.prose ul li, .prose ol li { margin: 6px 0; }
.prose ul li::marker { color: var(--tc-fg-dim); }
.prose ol li::marker { color: var(--tc-fg-dim); font-variant-numeric: tabular-nums; }

.prose blockquote {
  margin: 20px 0;
  padding: 14px 18px;
  border-left: 2px solid var(--tc-accent);
  background: var(--tc-surface-1);
  border-radius: 0 var(--tc-radius-md) var(--tc-radius-md) 0;
  color: var(--tc-fg-muted);
  font-size: var(--tc-fs-body);
}
.prose blockquote p { margin: 0; }

.prose hr {
  border: 0;
  border-top: 1px solid var(--tc-outline-variant);
  margin: 40px 0;
}

/* Inline code */
.prose :not(pre) > code {
  background: var(--tc-surface-2);
  border: 1px solid var(--tc-outline-variant);
  border-radius: var(--tc-radius-sm);
  padding: 1px 6px;
  font-family: var(--tc-font-mono);
  font-size: 0.86em;
  color: var(--tc-fg);
  font-weight: 500;
}

/* =============================================================
   CODE BLOCK
   ============================================================= */
.code-block {
  margin: 20px 0 24px;
  background: var(--tc-midnight-depth);
  border: 1px solid var(--tc-outline-variant);
  border-radius: var(--tc-radius-lg);
  overflow: hidden;
  box-shadow: var(--tc-inner-edge);
}
.code-block__head {
  display: flex; align-items: center;
  background: var(--tc-surface-1);
  border-bottom: 1px solid var(--tc-outline-variant);
  padding: 0 4px 0 14px;
  min-height: 36px;
}
.code-block__lang {
  font-family: var(--tc-font-mono);
  font-size: 11px;
  color: var(--tc-fg-dim);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
.code-block__tabs {
  display: flex; align-items: center; gap: 2px;
  margin-left: -10px;
}
.code-block__tab {
  font-family: var(--tc-font-mono);
  font-size: 11.5px;
  color: var(--tc-fg-dim);
  padding: 6px 10px;
  border-radius: var(--tc-radius-xs);
  letter-spacing: 0.02em;
  transition: color var(--tc-dur-fast), background var(--tc-dur-fast);
}
.code-block__tab:hover { color: var(--tc-fg-muted); background: var(--tc-surface-2); }
.code-block__tab.active {
  color: var(--tc-fg);
  background: var(--tc-surface-2);
  box-shadow: inset 0 -1px 0 var(--tc-accent);
}
.code-block__spacer { flex: 1; }
.code-block__actions {
  display: flex; align-items: center; gap: 2px;
  padding: 4px;
}
.code-block__btn {
  display: inline-flex; align-items: center; gap: 5px;
  font-family: var(--tc-font-mono);
  font-size: 10.5px;
  color: var(--tc-fg-dim);
  padding: 5px 8px;
  border-radius: var(--tc-radius-xs);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  transition: color var(--tc-dur-fast), background var(--tc-dur-fast);
}
.code-block__btn:hover { color: var(--tc-fg); background: var(--tc-surface-2); }
.code-block__btn svg { width: 12px; height: 12px; stroke-width: 2; }
.code-block__btn.copied { color: #46D397; }

.code-block pre {
  margin: 0;
  padding: 16px 18px;
  font-family: var(--tc-font-mono);
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--tc-fg);
  overflow-x: auto;
  background: transparent;
}
.code-block pre code { font-family: inherit; font-size: inherit; background: none; border: none; padding: 0; color: inherit; }

/* Syntax token colors — restrained, dark-first */
.tok-c  { color: var(--tc-fg-dim); font-style: italic; }      /* comment */
.tok-k  { color: var(--tc-violet-fixed); }                     /* keyword */
.tok-s  { color: #9BE3B2; }                                    /* string */
.tok-n  { color: var(--tc-phi-gold-fixed); }                   /* number */
.tok-t  { color: var(--tc-core-blue-fixed); }                  /* type */
.tok-f  { color: var(--tc-ice-white); font-weight: 500; }      /* function */
.tok-o  { color: var(--tc-mist); }                             /* operator */
.tok-p  { color: #FFB8BD; }                                    /* punctuation/special */
.tok-v  { color: var(--tc-mist); }                             /* variable */
.tok-l  { color: var(--tc-fg); }                               /* plain */

/* =============================================================
   TABLE
   ============================================================= */
.prose table {
  width: 100%;
  border-collapse: collapse;
  margin: 20px 0 24px;
  font-size: 13px;
  border: 1px solid var(--tc-outline-variant);
  border-radius: var(--tc-radius-md);
  overflow: hidden;
  display: table;
}
.prose thead {
  background: var(--tc-surface-1);
}
.prose th {
  text-align: left;
  font-weight: 600;
  font-size: 11px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--tc-fg-dim);
  padding: 10px 14px;
  border-bottom: 1px solid var(--tc-outline-variant);
}
.prose td {
  padding: 11px 14px;
  border-bottom: 1px solid var(--tc-outline-variant);
  color: var(--tc-fg-muted);
  vertical-align: top;
  line-height: 1.5;
}
.prose tbody tr:last-child td { border-bottom: none; }
.prose tbody tr:hover td { background: rgba(17,30,56,0.4); }
.prose td code, .prose th code {
  background: var(--tc-surface-2);
  border: 1px solid var(--tc-outline-variant);
  border-radius: var(--tc-radius-xs);
  padding: 1px 5px;
  font-size: 11.5px;
  color: var(--tc-fg);
}

/* Callouts */
.callout {
  display: flex; gap: 14px;
  margin: 20px 0;
  padding: 16px 18px;
  border-radius: var(--tc-radius-md);
  background: var(--tc-surface-1);
  border: 1px solid var(--tc-outline-variant);
  box-shadow: var(--tc-inner-edge);
}
.callout__icon {
  width: 22px; height: 22px;
  border-radius: 50%;
  display: inline-flex; align-items: center; justify-content: center;
  flex: 0 0 auto;
  margin-top: 1px;
}
.callout__icon svg { width: 13px; height: 13px; stroke-width: 2; }
.callout__body { flex: 1; min-width: 0; }
.callout__title { font-size: 13px; font-weight: 600; color: var(--tc-fg); margin: 0 0 4px; letter-spacing: -0.003em; }
.callout__body p { margin: 0; font-size: 14px; line-height: 1.55; color: var(--tc-fg-muted); }
.callout--info { border-color: rgba(46,167,255,0.32); background: rgba(46,167,255,0.05); }
.callout--info .callout__icon { background: rgba(46,167,255,0.18); color: var(--tc-core-blue-fixed); }
.callout--warn { border-color: rgba(201,169,107,0.34); background: rgba(201,169,107,0.05); }
.callout--warn .callout__icon { background: rgba(201,169,107,0.16); color: var(--tc-phi-gold-fixed); }
.callout--danger { border-color: rgba(255,90,101,0.32); background: rgba(255,90,101,0.05); }
.callout--danger .callout__icon { background: rgba(255,90,101,0.16); color: #FF8E96; }

/* =============================================================
   PAGER (prev / next)
   ============================================================= */
.doc-pager {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-top: 64px;
  padding-top: 32px;
  border-top: 1px solid var(--tc-outline-variant);
}
.doc-pager__btn {
  background: var(--tc-surface-2);
  border: 1px solid var(--tc-outline-variant);
  border-radius: var(--tc-radius-md);
  box-shadow: var(--tc-inner-edge);
  padding: 14px 16px;
  text-align: left;
  transition: border-color var(--tc-dur-fast), background var(--tc-dur-fast);
}
.doc-pager__btn:hover { border-color: var(--tc-steel); background: var(--tc-surface-3); }
.doc-pager__btn.next { text-align: right; }
.doc-pager__btn .label {
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--tc-fg-dim);
  display: flex; align-items: center; gap: 6px;
  font-weight: 500;
}
.doc-pager__btn.next .label { justify-content: flex-end; }
.doc-pager__btn .title {
  margin-top: 4px;
  font-family: var(--tc-font-display);
  font-size: 15px;
  color: var(--tc-fg);
  font-weight: 500;
}
.doc-pager__btn .empty { color: transparent; }

/* Feedback */
.doc-feedback {
  margin-top: 40px;
  padding: 20px 22px;
  background: var(--tc-surface-1);
  border: 1px solid var(--tc-outline-variant);
  border-radius: var(--tc-radius-lg);
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  box-shadow: var(--tc-inner-edge);
}
.doc-feedback__text { font-size: 13.5px; color: var(--tc-fg-muted); }
.doc-feedback__text strong { color: var(--tc-fg); }
.doc-feedback__actions { display: flex; gap: 8px; }
.doc-feedback__btn {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 13px;
  padding: 7px 12px;
  border-radius: var(--tc-radius-sm);
  background: var(--tc-surface-2);
  border: 1px solid var(--tc-outline-variant);
  color: var(--tc-fg);
  transition: border-color var(--tc-dur-fast), background var(--tc-dur-fast);
}
.doc-feedback__btn:hover { border-color: var(--tc-steel); background: var(--tc-surface-3); }
.doc-feedback__btn svg { width: 13px; height: 13px; }

/* =============================================================
   RIGHT TOC
   ============================================================= */
.docs-toc {
  position: sticky;
  top: 56px;
  align-self: start;
  height: calc(100vh - 56px);
  padding: 40px 24px 80px 16px;
  overflow-y: auto;
}
.docs-toc__title {
  font-size: 10.5px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--tc-fg-dim);
  margin: 0 0 12px;
  padding: 0 8px;
}
.docs-toc__list { display: flex; flex-direction: column; gap: 1px; border-left: 1px solid var(--tc-outline-variant); }
.docs-toc__item {
  font-size: 12.5px;
  color: var(--tc-fg-dim);
  padding: 5px 12px 5px 14px;
  cursor: pointer;
  border-left: 2px solid transparent;
  margin-left: -1px;
  line-height: 1.4;
  transition: color var(--tc-dur-fast), border-color var(--tc-dur-fast);
}
.docs-toc__item:hover { color: var(--tc-fg-muted); }
.docs-toc__item.active {
  color: var(--tc-fg);
  border-left-color: var(--tc-accent);
  font-weight: 500;
}
.docs-toc__item[data-level="3"] { padding-left: 26px; font-size: 12px; }
.docs-toc__item[data-level="4"] { padding-left: 38px; font-size: 11.5px; }

.docs-toc__meta {
  margin-top: 24px;
  padding: 14px 12px;
  background: var(--tc-surface-1);
  border: 1px solid var(--tc-outline-variant);
  border-radius: var(--tc-radius-md);
  font-size: 11.5px;
  color: var(--tc-fg-dim);
  line-height: 1.5;
  box-shadow: var(--tc-inner-edge);
}
.docs-toc__meta strong { color: var(--tc-fg-muted); display: block; margin-bottom: 4px; font-size: 11px; letter-spacing: 0.06em; text-transform: uppercase; font-weight: 600; }
.docs-toc__edit {
  display: inline-flex; align-items: center; gap: 6px;
  margin-top: 8px;
  font-size: 12px;
  color: var(--tc-fg-muted);
  transition: color var(--tc-dur-fast);
}
.docs-toc__edit:hover { color: var(--tc-accent); }
.docs-toc__edit svg { width: 12px; height: 12px; }

/* =============================================================
   LANDING / HOME
   ============================================================= */
.home {
  max-width: 1080px;
  min-width: 0;
  width: 100%;
  margin: 0 auto;
  padding: 56px 56px 96px;
}
.docs-body[data-density="compact"] .home { padding: 36px 40px 72px; }
.docs-body[data-density="spacious"] .home { padding: 72px 80px 120px; }

.hero {
  position: relative;
  padding: 8px 0 56px;
  margin-bottom: 56px;
  border-bottom: 1px solid var(--tc-outline-variant);
}
.hero__eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--tc-fg-dim);
  margin-bottom: 18px;
  font-weight: 600;
}
.hero__eyebrow .dot { width: 6px; height: 6px; border-radius: 50%; background: var(--tc-accent); box-shadow: 0 0 8px var(--tc-accent); }
.hero h1 {
  font-family: var(--tc-font-display);
  font-size: clamp(34px, 5.2vw, 56px);
  line-height: 1.04;
  font-weight: 600;
  letter-spacing: -0.026em;
  margin: 0 0 18px;
  text-wrap: balance;
  max-width: 18ch;
}
.hero h1 .grad {
  background: var(--tc-gradient-signature);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero p {
  font-size: 18px;
  line-height: 1.55;
  color: var(--tc-fg-muted);
  max-width: 56ch;
  margin: 0 0 28px;
  text-wrap: pretty;
}
.hero__actions {
  display: flex; gap: 10px; flex-wrap: wrap;
}
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--tc-font-sans);
  font-weight: 500;
  font-size: 14px;
  padding: 10px 16px;
  border-radius: var(--tc-radius-md);
  border: 1px solid transparent;
  transition: background var(--tc-dur-base) var(--tc-ease-out), border-color var(--tc-dur-base);
}
.btn svg { width: 14px; height: 14px; stroke-width: 1.85; }
.btn--primary { background: var(--tc-core-blue); color: var(--tc-midnight); font-weight: 600; }
.btn--primary:hover { background: var(--tc-core-blue-fixed-dim); }
[data-surface="mcp"] .btn--primary { background: var(--tc-violet-signal); color: var(--tc-ice-white); }
[data-surface="mcp"] .btn--primary:hover { background: var(--tc-violet-fixed-dim); }
.btn--ghost { background: var(--tc-surface-2); color: var(--tc-fg); border-color: var(--tc-outline-variant); box-shadow: var(--tc-inner-edge); }
.btn--ghost:hover { background: var(--tc-surface-3); border-color: var(--tc-steel); }

/* Hero diagram (right side) */
.hero__art {
  position: absolute;
  right: -20px; top: 0;
  width: 360px; height: 360px;
  pointer-events: none;
  opacity: 0.9;
}

/* Surface map (Core / MCP / Auth tiles) */
.surface-map {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin: 0 0 56px;
}
.surface-tile {
  position: relative;
  background: var(--tc-surface-2);
  border: 1px solid var(--tc-outline-variant);
  border-radius: var(--tc-radius-lg);
  padding: 20px 20px 18px;
  box-shadow: var(--tc-inner-edge);
  overflow: hidden;
  cursor: pointer;
  transition: border-color var(--tc-dur-base) var(--tc-ease-out), transform var(--tc-dur-base);
}
.surface-tile:hover { border-color: var(--tc-steel); transform: translateY(-1px); }
.surface-tile__head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 12px; }
.surface-tile__name {
  font-family: var(--tc-font-display);
  font-size: 18px; font-weight: 500;
  letter-spacing: -0.006em;
}
.surface-tile__domain {
  font-family: var(--tc-font-mono);
  font-size: 11px;
  color: var(--tc-fg-dim);
  margin: 4px 0 12px;
}
.surface-tile__desc {
  font-size: 13px;
  color: var(--tc-fg-muted);
  line-height: 1.55;
  margin: 0 0 14px;
}
.surface-tile__foot { display: flex; align-items: center; justify-content: space-between; font-size: 11.5px; color: var(--tc-fg-dim); }
.surface-tile__arc {
  position: absolute;
  right: -24px; bottom: -24px;
  width: 110px; height: 110px;
  opacity: 0.5;
  pointer-events: none;
}

/* Quick start grid */
.section-head {
  display: flex; align-items: flex-end; justify-content: space-between;
  margin-bottom: 18px;
  gap: 16px;
}
.section-head h2 {
  font-family: var(--tc-font-display);
  font-size: 22px;
  font-weight: 600;
  letter-spacing: -0.012em;
  margin: 0;
}
.section-head p { font-size: 13px; color: var(--tc-fg-muted); margin: 4px 0 0; }
.section-head__link {
  font-size: 13px;
  color: var(--tc-fg-muted);
  display: inline-flex; align-items: center; gap: 4px;
}
.section-head__link:hover { color: var(--tc-fg); }
.section-head__link svg { width: 12px; height: 12px; }

.qs-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-bottom: 56px;
}
.qs-card {
  background: var(--tc-surface-2);
  border: 1px solid var(--tc-outline-variant);
  border-radius: var(--tc-radius-md);
  padding: 16px 16px 18px;
  box-shadow: var(--tc-inner-edge);
  cursor: pointer;
  transition: border-color var(--tc-dur-fast), background var(--tc-dur-fast);
}
.qs-card:hover { border-color: var(--tc-steel); background: var(--tc-surface-3); }
.qs-card__icon {
  width: 28px; height: 28px;
  background: var(--tc-surface-3);
  border: 1px solid var(--tc-outline-variant);
  border-radius: var(--tc-radius-sm);
  display: inline-flex; align-items: center; justify-content: center;
  color: var(--tc-accent);
  margin-bottom: 12px;
}
.qs-card__icon svg { width: 14px; height: 14px; stroke-width: 1.85; }
[data-surface="mcp"] .qs-card__icon { color: var(--tc-violet-fixed); }
.qs-card__title {
  font-family: var(--tc-font-display);
  font-size: 14.5px; font-weight: 500;
  color: var(--tc-fg);
  letter-spacing: -0.003em;
  margin: 0 0 4px;
}
.qs-card__desc { font-size: 12.5px; color: var(--tc-fg-muted); line-height: 1.5; margin: 0; }

/* Runtime tabs (Go / TS / Python) on landing */
.runtime-block {
  margin: 0 0 56px;
}
.runtime-block__head {
  display: flex; align-items: center; gap: 4px;
  border-bottom: 1px solid var(--tc-outline-variant);
  margin-bottom: 16px;
  padding-bottom: 0;
}
.runtime-block__tab {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--tc-font-sans);
  font-size: 13px;
  color: var(--tc-fg-muted);
  padding: 10px 14px;
  margin-bottom: -1px;
  border-bottom: 2px solid transparent;
  transition: color var(--tc-dur-fast), border-color var(--tc-dur-fast);
}
.runtime-block__tab svg { width: 14px; height: 14px; }
.runtime-block__tab:hover { color: var(--tc-fg); }
.runtime-block__tab.active {
  color: var(--tc-fg);
  border-bottom-color: var(--tc-accent);
  font-weight: 500;
}

/* Stats strip */
.stats-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--tc-outline-variant);
  border: 1px solid var(--tc-outline-variant);
  border-radius: var(--tc-radius-lg);
  overflow: hidden;
  margin-bottom: 56px;
  box-shadow: var(--tc-inner-edge);
}
.stats-strip__cell {
  background: var(--tc-surface-1);
  padding: 18px 20px;
}
.stats-strip__label {
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--tc-fg-dim);
  font-weight: 600;
  margin-bottom: 6px;
}
.stats-strip__value {
  font-family: var(--tc-font-display);
  font-size: 24px;
  font-weight: 500;
  color: var(--tc-fg);
  letter-spacing: -0.014em;
}
.stats-strip__value .mono { font-family: var(--tc-font-mono); font-weight: 400; font-size: 18px; color: var(--tc-fg-muted); }
.stats-strip__sub { font-size: 11.5px; color: var(--tc-fg-dim); margin-top: 3px; font-family: var(--tc-font-mono); }

/* =============================================================
   SEARCH PALETTE
   ============================================================= */
.palette-scrim {
  position: fixed; inset: 0;
  background: rgba(5,10,26,0.6);
  backdrop-filter: blur(4px);
  z-index: 200;
  display: flex; align-items: flex-start; justify-content: center;
  padding-top: 12vh;
  animation: palette-fade 160ms var(--tc-ease-out);
}
@keyframes palette-fade { from { opacity: 0; } to { opacity: 1; } }
.palette {
  width: 640px;
  max-width: 92vw;
  background: var(--tc-surface-2);
  border: 1px solid var(--tc-outline-variant);
  border-radius: var(--tc-radius-xl);
  box-shadow: var(--tc-shadow-xl), var(--tc-inner-edge);
  overflow: hidden;
  animation: palette-rise 200ms var(--tc-ease-out);
}
@keyframes palette-rise { from { transform: translateY(-8px); opacity: 0; } to { transform: translateY(0); opacity: 1; } }
.palette__input {
  display: flex; align-items: center; gap: 12px;
  padding: 14px 18px;
  border-bottom: 1px solid var(--tc-outline-variant);
}
.palette__input svg { width: 16px; height: 16px; color: var(--tc-fg-dim); stroke-width: 1.85; }
.palette__input input {
  background: transparent; border: none; outline: none;
  flex: 1;
  font-size: 15px;
  color: var(--tc-fg);
}
.palette__input input::placeholder { color: var(--tc-fg-dim); }
.palette__input kbd {
  font-family: var(--tc-font-mono);
  font-size: 10.5px;
  color: var(--tc-fg-dim);
  background: var(--tc-surface-3);
  border: 1px solid var(--tc-outline-variant);
  padding: 1px 6px;
  border-radius: var(--tc-radius-xs);
}
.palette__list {
  max-height: 60vh; overflow-y: auto;
  padding: 6px;
}
.palette__group {
  font-size: 10.5px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  font-weight: 600;
  color: var(--tc-fg-dim);
  padding: 12px 12px 6px;
}
.palette__item {
  display: flex; align-items: center; gap: 12px;
  padding: 10px 12px;
  border-radius: var(--tc-radius-md);
  cursor: pointer;
  transition: background var(--tc-dur-fast);
  width: 100%;
  text-align: left;
}
.palette__item:hover, .palette__item.active { background: var(--tc-surface-3); }
.palette__item.active { box-shadow: inset 2px 0 0 var(--tc-accent); }
.palette__item__icon {
  width: 28px; height: 28px;
  background: var(--tc-surface-1);
  border: 1px solid var(--tc-outline-variant);
  border-radius: var(--tc-radius-sm);
  display: inline-flex; align-items: center; justify-content: center;
  color: var(--tc-fg-muted);
  flex: 0 0 auto;
}
.palette__item__icon svg { width: 13px; height: 13px; }
.palette__item__title { font-size: 14px; color: var(--tc-fg); font-weight: 500; }
.palette__item__path { font-family: var(--tc-font-mono); font-size: 11px; color: var(--tc-fg-dim); margin-top: 2px; }
.palette__item__main { flex: 1; min-width: 0; }
.palette__item__hint {
  font-family: var(--tc-font-mono);
  font-size: 10.5px;
  color: var(--tc-fg-dim);
}
.palette__empty {
  padding: 36px 18px;
  text-align: center;
  font-size: 13px;
  color: var(--tc-fg-dim);
}
.palette__foot {
  display: flex; align-items: center; gap: 14px;
  padding: 10px 16px;
  border-top: 1px solid var(--tc-outline-variant);
  background: var(--tc-surface-1);
  font-size: 11.5px;
  color: var(--tc-fg-dim);
}
.palette__foot__item { display: inline-flex; align-items: center; gap: 6px; }
.palette__foot__item kbd {
  font-family: var(--tc-font-mono);
  font-size: 10px;
  color: var(--tc-fg-muted);
  background: var(--tc-surface-3);
  border: 1px solid var(--tc-outline-variant);
  padding: 1px 5px;
  border-radius: var(--tc-radius-xs);
}

/* Tags inline mark */
mark.hl {
  background: rgba(46,167,255,0.22);
  color: var(--tc-fg);
  padding: 0 2px;
  border-radius: 2px;
}
[data-surface="mcp"] mark.hl { background: rgba(122,92,255,0.24); }

/* Responsive — keep prototype usable */
@media (max-width: 1320px) {
  .docs-header__nav button:nth-child(n+3) { display: none; }
}
@media (max-width: 1200px) {
  .docs-body { grid-template-columns: 260px minmax(0, 1fr); }
  .docs-toc { display: none; }
  .docs-header__repo { display: none; }
  .docs-search-trigger { flex: 0 1 220px; }
}
@media (max-width: 1024px) {
  .docs-header__nav { display: none; }
  .docs-search-trigger { flex: 0 1 200px; }
  .docs-search-trigger .label { display: none; }
  .docs-search-trigger kbd { display: none; }
}
@media (max-width: 1100px) {
  .home { padding: 40px 32px 80px; }
  .docs-content { padding: 32px 36px 80px; }
}
@media (max-width: 900px) {
  .docs-body { grid-template-columns: 1fr; }
  .docs-sidebar { display: none; }
  .docs-content, .home { padding: 28px 24px 80px; }
  .hero h1 { font-size: 40px; }
  .hero__art { display: none; }
  .surface-map { grid-template-columns: 1fr; }
  .qs-grid { grid-template-columns: 1fr; }
  .stats-strip { grid-template-columns: repeat(2, 1fr); }
}