/* Chataway developer docs.
   Tokens follow the landing page (src/views/landing.html) — Carbon, the
   app's default palette. Light mode follows the visitor's OS. */

:root {
  --bg:        #0b0b0c;
  --bg-raised: #111113;
  --card:      #141416;
  --card-hi:   #1a1a1d;
  --border:    #26262a;
  --border-hi: #35353a;
  --ink:       #f4f3f0;
  --muted:     #a5a29c;
  --dim:       #6f6c67;
  --primary:   #ff7a2f;
  --primary-hi:#ff9459;
  --teal:      #5ec08c;
  --rust:      #f0563d;
  --amber:     #f2b33d;
  --bg-rgb:     11, 11, 12;
  --accent-rgb: 255, 122, 47;
  --teal-rgb:   94, 192, 140;
  --rust-rgb:   240, 86, 61;
  --amber-rgb:  242, 179, 61;
  --code-bg:   #111113;
  --code-ink:  #e6e4df;
  --tok-comment: #6f6c67;
  --tok-string:  #9fd08a;
  --tok-number:  #f2b33d;
  --tok-keyword: #ff9459;
  --tok-key:     #8cc7f0;
  --tok-fn:      #f4f3f0;
  --tok-literal: #d59cf5;
  --brand-gradient: linear-gradient(90deg, #ffd41c, #ffa419, #ff3f16, #ff2a50, #ee2975, #b027a3, #6b27c1);
  --mono: 'JetBrains Mono', 'Fira Code', ui-monospace, 'SF Mono', Menlo, Consolas, monospace;
  --sans: -apple-system, BlinkMacSystemFont, 'Inter', 'Segoe UI', Helvetica, Arial, sans-serif;
  --topbar-h: 58px;
  --sidebar-w: 256px;
  --toc-w: 220px;
  color-scheme: dark;
}

@media (prefers-color-scheme: light) {
  :root {
    --bg:        #ffffff;
    --bg-raised: #fafaf8;
    --card:      #fafaf8;
    --card-hi:   #f1f0ed;
    --border:    #e5e4df;
    --border-hi: #d3d1cb;
    --ink:       #101011;
    --muted:     #5b5852;
    --dim:       #8c8983;
    --primary:   #e2560f;
    --primary-hi:#c2470b;
    --teal:      #1f8a5b;
    --rust:      #c33d22;
    --amber:     #9a6a00;
    --bg-rgb:     255, 255, 255;
    --accent-rgb: 226, 86, 15;
    --teal-rgb:   31, 138, 91;
    --rust-rgb:   195, 61, 34;
    --amber-rgb:  190, 135, 0;
    --code-bg:   #f6f5f2;
    --code-ink:  #1d1d1f;
    --tok-comment: #8c8983;
    --tok-string:  #2f7a2a;
    --tok-number:  #9a5b00;
    --tok-keyword: #c2470b;
    --tok-key:     #1c5f99;
    --tok-fn:      #101011;
    --tok-literal: #8a3fb5;
    color-scheme: light;
  }
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-padding-top: calc(var(--topbar-h) + 16px); -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--sans);
  background: var(--bg);
  color: var(--ink);
  line-height: 1.65;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; }

.brand-rail { position: fixed; top: 0; left: 0; right: 0; height: 3px; background: var(--brand-gradient); z-index: 60; }

/* ── Top bar ─────────────────────────────────────────────────────── */
.topbar {
  position: sticky; top: 0; z-index: 50;
  height: var(--topbar-h);
  display: flex; align-items: center; gap: 1rem;
  padding: 3px 1.25rem 0;
  background: rgba(var(--bg-rgb), 0.86);
  backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
}
.brand { display: flex; align-items: center; gap: 0.55rem; font-family: var(--mono); font-weight: 700; font-size: 0.93rem; flex-shrink: 0; }
.brand .mark { width: 26px; height: 26px; display: block; }
.brand-sub { color: var(--muted); font-weight: 500; padding-left: 0.55rem; border-left: 1px solid var(--border-hi); }
.menu-btn {
  display: none; align-items: center; justify-content: center;
  width: 38px; height: 38px; margin-left: -0.4rem;
  background: none; border: 0; color: var(--ink); border-radius: 8px; cursor: pointer;
}
.menu-btn:hover { background: var(--card); }
.top-links { display: flex; gap: 1.3rem; margin-left: auto; font-family: var(--mono); font-size: 0.78rem; color: var(--muted); flex-shrink: 0; }
.top-links a:hover { color: var(--ink); }

/* Search */
.search { position: relative; flex: 0 1 340px; margin-left: 1.25rem; }
.search input {
  width: 100%; height: 36px;
  padding: 0 2.2rem 0 2.1rem;
  font: inherit; font-size: 0.86rem; color: var(--ink);
  background: var(--card); border: 1px solid var(--border); border-radius: 9px; outline: none;
  -webkit-appearance: none; appearance: none;
}
.search input::-webkit-search-cancel-button { display: none; }
.search input:focus { border-color: rgba(var(--accent-rgb), 0.6); box-shadow: 0 0 0 3px rgba(var(--accent-rgb), 0.15); }
.search-icon { position: absolute; left: 0.7rem; top: 50%; transform: translateY(-50%); color: var(--dim); pointer-events: none; }
.search-kbd {
  position: absolute; right: 0.55rem; top: 50%; transform: translateY(-50%);
  font-family: var(--mono); font-size: 0.7rem; color: var(--dim);
  border: 1px solid var(--border-hi); border-radius: 5px; padding: 0 0.35rem; line-height: 1.4;
}
.search input:focus ~ .search-kbd { display: none; }
.search-results {
  position: absolute; top: calc(100% + 6px); left: 0; right: 0; min-width: 320px;
  max-height: min(70vh, 520px); overflow-y: auto;
  background: var(--bg-raised); border: 1px solid var(--border-hi); border-radius: 12px;
  box-shadow: 0 24px 60px -20px rgba(0,0,0,0.55); padding: 0.35rem;
}
.search-results a { display: block; padding: 0.5rem 0.7rem; border-radius: 8px; }
.search-results a[aria-selected="true"], .search-results a:hover { background: var(--card-hi); }
.search-results .sr-title { font-size: 0.86rem; font-weight: 600; color: var(--ink); }
.search-results .sr-page { font-family: var(--mono); font-size: 0.68rem; color: var(--primary); text-transform: uppercase; letter-spacing: 0.08em; }
.search-results .sr-text { font-size: 0.78rem; color: var(--muted); display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.search-results mark { background: rgba(var(--accent-rgb), 0.22); color: inherit; border-radius: 2px; }
.search-empty { padding: 0.8rem; font-size: 0.85rem; color: var(--muted); }

/* ── Shell ───────────────────────────────────────────────────────── */
.shell {
  display: grid;
  grid-template-columns: var(--sidebar-w) minmax(0, 1fr) var(--toc-w);
  max-width: 1440px; margin: 0 auto;
}
.sidebar {
  position: sticky; top: var(--topbar-h);
  height: calc(100vh - var(--topbar-h));
  overflow-y: auto; overscroll-behavior: contain;
  padding: 1.6rem 1rem 3rem 1.25rem;
  border-right: 1px solid var(--border);
}
.nav-group + .nav-group { margin-top: 1.5rem; }
.nav-heading {
  font-family: var(--mono); font-size: 0.68rem; text-transform: uppercase; letter-spacing: 0.13em;
  color: var(--dim); margin: 0 0 0.45rem 0.65rem;
}
.sidebar ul { list-style: none; }
.sidebar li a {
  display: block; padding: 0.3rem 0.65rem; border-radius: 7px;
  font-size: 0.88rem; color: var(--muted); line-height: 1.45;
}
.sidebar li a:hover { color: var(--ink); background: var(--card); }
.sidebar li a.active { color: var(--ink); background: var(--card-hi); font-weight: 600; position: relative; }
.sidebar li a.active::before { content: ''; position: absolute; left: 0; top: 7px; bottom: 7px; width: 2px; border-radius: 2px; background: var(--primary); }

.content { min-width: 0; padding: 2.4rem clamp(1.25rem, 4vw, 3.5rem) 4rem; }
.doc { max-width: 760px; margin: 0 auto; }
.doc-footer, .pager { max-width: 760px; margin-left: auto; margin-right: auto; }

.toc {
  position: sticky; top: var(--topbar-h);
  height: calc(100vh - var(--topbar-h)); overflow-y: auto;
  padding: 2.5rem 1.25rem 3rem 0.5rem;
  font-size: 0.8rem;
}
.toc-title { font-family: var(--mono); font-size: 0.68rem; text-transform: uppercase; letter-spacing: 0.13em; color: var(--dim); margin-bottom: 0.6rem; }
.toc ul { list-style: none; border-left: 1px solid var(--border); }
.toc li a { display: block; padding: 0.22rem 0 0.22rem 0.8rem; margin-left: -1px; color: var(--muted); border-left: 1px solid transparent; line-height: 1.4; }
.toc li.toc-l3 a { padding-left: 1.6rem; font-size: 0.77rem; }
.toc li a:hover { color: var(--ink); }
.toc li a.active { color: var(--primary); border-left-color: var(--primary); }
.toc code { font-size: 0.92em; }

/* ── Typography ──────────────────────────────────────────────────── */
.eyebrow { font-family: var(--mono); font-size: 0.7rem; text-transform: uppercase; letter-spacing: 0.14em; color: var(--primary); margin-bottom: 0.6rem; }
.doc h1, .doc h2, .doc h3, .doc h4 { font-family: var(--mono); font-weight: 700; letter-spacing: -0.025em; line-height: 1.2; position: relative; }
.doc h1 { font-size: clamp(1.8rem, 4vw, 2.4rem); margin-bottom: 0.7rem; }
.doc h2 { font-size: 1.42rem; margin: 2.8rem 0 0.9rem; padding-top: 0.6rem; }
.doc h3 { font-size: 1.08rem; margin: 2rem 0 0.6rem; letter-spacing: -0.01em; }
.doc h4 { font-size: 0.95rem; margin: 1.5rem 0 0.5rem; letter-spacing: 0; }
.doc h2 + h3 { margin-top: 1.2rem; }
.anchor {
  position: absolute; left: -1.1em; width: 1em; color: var(--dim); opacity: 0; font-weight: 500;
  transition: opacity 0.15s;
}
.doc h2:hover .anchor, .doc h3:hover .anchor, .doc h4:hover .anchor, .anchor:focus { opacity: 1; }
.lede { font-size: 1.1rem; color: var(--muted); margin-bottom: 2rem; max-width: 62ch; }
.doc p { margin: 0 0 1.05rem; }
.doc ul, .doc ol { margin: 0 0 1.1rem 1.4rem; }
.doc li { margin: 0.28rem 0; }
.doc li > ul, .doc li > ol { margin-top: 0.3rem; margin-bottom: 0.3rem; }
.doc li > p { margin-bottom: 0.5rem; }
.doc a { color: var(--primary); text-decoration: underline; text-decoration-color: rgba(var(--accent-rgb), 0.35); text-underline-offset: 3px; }
.doc a:hover { text-decoration-color: currentColor; }
.doc a.anchor { text-decoration: none; color: var(--dim); }
.doc strong { font-weight: 650; }
.doc hr { border: 0; border-top: 1px solid var(--border); margin: 2.5rem 0; }
.doc blockquote { border-left: 3px solid var(--border-hi); padding: 0.1rem 0 0.1rem 1rem; color: var(--muted); margin: 0 0 1.1rem; }
.doc img { border-radius: 10px; border: 1px solid var(--border); }
kbd {
  font-family: var(--mono); font-size: 0.78em;
  padding: 0.05rem 0.4rem; border-radius: 5px;
  border: 1px solid var(--border-hi); border-bottom-width: 2px; background: var(--card);
}

/* Task lists */
.doc li.task-item { list-style: none; position: relative; }
.doc ul:has(> li.task-item) { margin-left: 0.4rem; }
.doc li.task-item .task {
  display: inline-block; width: 0.95em; height: 0.95em; margin: 0 0.55em -0.12em 0;
  border: 1.5px solid var(--border-hi); border-radius: 4px; vertical-align: baseline;
}
.doc li.task-item .task.done { background: var(--teal); border-color: var(--teal); }

/* Inline code */
.doc code {
  font-family: var(--mono); font-size: 0.84em;
  background: var(--card-hi); border: 1px solid var(--border);
  padding: 0.08em 0.35em; border-radius: 5px;
  overflow-wrap: anywhere;
}
.doc a code { color: var(--primary); }
.doc h1 code, .doc h2 code, .doc h3 code, .doc h4 code { font-size: 0.9em; background: none; border: 0; padding: 0; }

/* Code blocks */
.code-block {
  position: relative; margin: 0 0 1.3rem;
  background: var(--code-bg); border: 1px solid var(--border); border-radius: 11px;
}
.code-block pre { overflow-x: auto; padding: 1rem 1.1rem; font-family: var(--mono); font-size: 0.8rem; line-height: 1.6; color: var(--code-ink); tab-size: 2; }
.code-block pre code { background: none; border: 0; padding: 0; font-size: inherit; overflow-wrap: normal; white-space: pre; }
.code-title {
  font-family: var(--mono); font-size: 0.72rem; color: var(--muted);
  padding: 0.5rem 1.1rem; border-bottom: 1px solid var(--border);
}
.code-lang {
  position: absolute; top: 0.55rem; right: 4.3rem;
  font-family: var(--mono); font-size: 0.64rem; text-transform: uppercase; letter-spacing: 0.1em; color: var(--dim);
  pointer-events: none;
}
/* Untitled blocks: the label would sit on top of the first line. */
.code-block:not(.has-title) .code-lang { display: none; }
.copy {
  position: absolute; top: 0.4rem; right: 0.45rem;
  font-family: var(--mono); font-size: 0.68rem; color: var(--muted);
  background: var(--card-hi); border: 1px solid var(--border-hi); border-radius: 6px;
  padding: 0.2rem 0.55rem; cursor: pointer; opacity: 0; transition: opacity 0.15s, color 0.15s;
}
.code-block:hover .copy, .copy:focus-visible, .copy.done { opacity: 1; }
.copy:hover { color: var(--ink); }
.copy.done { color: var(--teal); }
@media (hover: none) { .copy { opacity: 1; } .code-lang { display: none; } }
.code-block:not(.has-title) pre { padding-right: 4rem; }
.tok-comment { color: var(--tok-comment); font-style: italic; }
.tok-string { color: var(--tok-string); }
.tok-number { color: var(--tok-number); }
.tok-keyword { color: var(--tok-keyword); }
.tok-key { color: var(--tok-key); }
.tok-fn { color: var(--tok-fn); font-weight: 600; }
.tok-literal { color: var(--tok-literal); }
.tok-dim { color: var(--dim); user-select: none; }

/* Tables */
.table-wrap { overflow-x: auto; margin: 0 0 1.3rem; border: 1px solid var(--border); border-radius: 11px; }
.doc table { border-collapse: collapse; width: 100%; font-size: 0.86rem; line-height: 1.5; }
.doc th, .doc td { text-align: left; padding: 0.55rem 0.8rem; vertical-align: top; border-bottom: 1px solid var(--border); }
.doc th { font-family: var(--mono); font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.07em; color: var(--muted); font-weight: 600; background: var(--bg-raised); white-space: nowrap; }
.doc tbody tr:last-child td { border-bottom: 0; }
.doc td code { white-space: nowrap; }
.doc td:first-child code { color: var(--ink); }

/* Callouts */
.callout {
  margin: 0 0 1.3rem; padding: 0.85rem 1.05rem 0.2rem;
  border: 1px solid; border-radius: 11px; font-size: 0.93rem;
}
.callout-title { font-family: var(--mono); font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.1em; font-weight: 700; margin-bottom: 0.35rem; }
.callout p, .callout ul, .callout ol { margin-bottom: 0.65rem; }
.callout-note, .callout-tip { background: rgba(var(--teal-rgb), 0.07); border-color: rgba(var(--teal-rgb), 0.3); }
.callout-note .callout-title, .callout-tip .callout-title { color: var(--teal); }
.callout-important { background: rgba(var(--accent-rgb), 0.07); border-color: rgba(var(--accent-rgb), 0.3); }
.callout-important .callout-title { color: var(--primary); }
.callout-warning { background: rgba(var(--amber-rgb), 0.08); border-color: rgba(var(--amber-rgb), 0.35); }
.callout-warning .callout-title { color: var(--amber); }
.callout-caution { background: rgba(var(--rust-rgb), 0.07); border-color: rgba(var(--rust-rgb), 0.3); }
.callout-caution .callout-title { color: var(--rust); }

/* Diagrams (inline SVG in content) */
.diagram { margin: 0.4rem 0 1.5rem; padding: 1.1rem; background: var(--bg-raised); border: 1px solid var(--border); border-radius: 12px; overflow-x: auto; }
.diagram svg { display: block; width: 100%; height: auto; min-width: 560px; font-family: var(--mono); }
.diagram figcaption, .diagram .caption { font-size: 0.8rem; color: var(--muted); margin-top: 0.7rem; }
.diagram .box { fill: var(--card-hi); stroke: var(--border-hi); }
.diagram .box-accent { fill: rgba(var(--accent-rgb), 0.1); stroke: rgba(var(--accent-rgb), 0.55); }
.diagram .box-teal { fill: rgba(var(--teal-rgb), 0.1); stroke: rgba(var(--teal-rgb), 0.55); }
.diagram .zone { fill: none; stroke: var(--border-hi); stroke-dasharray: 5 5; }
.diagram .t { fill: var(--ink); font-size: 13px; font-weight: 600; }
.diagram .s { fill: var(--muted); font-size: 11px; }
.diagram .z { fill: var(--dim); font-size: 10.5px; text-transform: uppercase; letter-spacing: 0.1em; }
.diagram .line { stroke: var(--muted); stroke-width: 1.4; fill: none; }
.diagram .line-accent { stroke: var(--primary); stroke-width: 1.6; fill: none; }
.diagram .arrow { fill: var(--muted); }
.diagram .arrow-accent { fill: var(--primary); }
.diagram .num { fill: var(--primary); font-size: 11px; font-weight: 700; }
.diagram .lbl { paint-order: stroke; stroke: var(--bg-raised); stroke-width: 6px; stroke-linejoin: round; }

/* Card grid (overview) */
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(210px, 1fr)); gap: 0.8rem; margin: 0 0 1.6rem; }
.cards a.card, .cards div.card {
  display: block; padding: 1rem 1.05rem; border: 1px solid var(--border); border-radius: 12px; background: var(--card);
  text-decoration: none; color: var(--ink); transition: border-color 0.15s, background 0.15s;
}
.cards a.card:hover { border-color: rgba(var(--accent-rgb), 0.5); background: var(--card-hi); }
.card-title { font-family: var(--mono); font-weight: 700; font-size: 0.9rem; margin-bottom: 0.25rem; }
.card-text { font-size: 0.84rem; color: var(--muted); line-height: 1.5; }

/* Mock UI snippets in prose */
.mock {
  margin: 0.4rem 0 1.5rem; padding: 1rem 1.1rem; border: 1px solid var(--border-hi); border-radius: 12px;
  background: var(--card); font-size: 0.88rem; max-width: 460px;
}
.mock-head { display: flex; align-items: center; gap: 0.55rem; font-weight: 650; margin-bottom: 0.45rem; }
.mock-icon { width: 22px; height: 22px; border-radius: 6px; background: var(--accent, #E2231A); flex-shrink: 0; }
.mock-app { font-family: var(--mono); font-size: 0.7rem; color: var(--dim); font-weight: 500; margin-left: auto; }
.mock-body { color: var(--muted); margin-bottom: 0.8rem; }
.mock-thumbs { display: flex; gap: 0.4rem; margin-bottom: 0.8rem; }
.mock-thumbs span { width: 46px; height: 46px; border-radius: 7px; background: var(--card-hi); border: 1px solid var(--border); }
.mock-actions { display: flex; gap: 0.5rem; flex-wrap: wrap; }
.mock-btn { font-family: var(--mono); font-size: 0.75rem; padding: 0.35rem 0.8rem; border-radius: 8px; border: 1px solid var(--border-hi); color: var(--ink); }
.mock-btn.primary { background: var(--ink); color: var(--bg); border-color: var(--ink); }
.mock-field { display: block; margin-bottom: 0.6rem; }
.mock-field span { display: block; font-size: 0.75rem; color: var(--muted); margin-bottom: 0.2rem; }
.mock-field i { display: block; height: 30px; border: 1px solid var(--border-hi); border-radius: 7px; background: var(--bg); font-style: normal; font-size: 0.8rem; padding: 0.3rem 0.55rem; color: var(--ink); }

/* Pager + footer */
.pager { display: grid; grid-template-columns: 1fr 1fr; gap: 0.8rem; margin-top: 3.2rem; }
.pager a { display: flex; flex-direction: column; gap: 0.15rem; padding: 0.85rem 1rem; border: 1px solid var(--border); border-radius: 11px; }
.pager a:hover { border-color: rgba(var(--accent-rgb), 0.5); }
.pager-next { text-align: right; }
.pager-label { font-family: var(--mono); font-size: 0.7rem; color: var(--dim); }
.pager-title { font-weight: 600; font-size: 0.93rem; }
.doc-footer {
  display: flex; justify-content: space-between; gap: 1rem; flex-wrap: wrap;
  margin-top: 2.2rem; padding-top: 1.2rem; border-top: 1px solid var(--border);
  font-family: var(--mono); font-size: 0.72rem; color: var(--dim);
}
.doc-footer a:hover { color: var(--ink); }

.scrim { position: fixed; inset: 0; background: rgba(0,0,0,0.45); z-index: 40; }

/* ── Responsive ──────────────────────────────────────────────────── */
@media (max-width: 1200px) {
  .shell { grid-template-columns: var(--sidebar-w) minmax(0, 1fr); }
  .toc { display: none; }
}
@media (max-width: 960px) {
  .top-links { display: none; }
  .search { margin-left: auto; }
}
@media (max-width: 860px) {
  .menu-btn { display: inline-flex; }
  .shell { grid-template-columns: minmax(0, 1fr); }
  .sidebar {
    position: fixed; top: var(--topbar-h); left: 0; bottom: 0; height: auto; width: min(300px, 84vw);
    background: var(--bg); z-index: 45; transform: translateX(-102%); transition: transform 0.2s ease;
    box-shadow: 20px 0 40px -20px rgba(0,0,0,0.5);
  }
  body.nav-open .sidebar { transform: none; }
  body.nav-open { overflow: hidden; }
  .content { padding-top: 1.6rem; }
}
@media (max-width: 560px) {
  :root { --topbar-h: 54px; }
  .topbar { gap: 0.5rem; padding-left: 0.9rem; padding-right: 0.9rem; }
  .brand-sub { display: none; }
  .search { flex: 1 1 auto; margin-left: 0.4rem; }
  .search-kbd { display: none; }
  .search-results { position: fixed; top: calc(var(--topbar-h) + 4px); left: 0.6rem; right: 0.6rem; min-width: 0; }
  .content { padding-left: 1rem; padding-right: 1rem; }
  .doc h2 { font-size: 1.25rem; }
  .lede { font-size: 1rem; }
  .pager { grid-template-columns: 1fr; }
  .anchor { display: none; }
  .doc ul, .doc ol { margin-left: 1.15rem; }
}
@media (prefers-reduced-motion: reduce) { * { transition: none !important; } }