/* Hallmark · genre: editorial · macrostructure: Index-First · theme: Almanac (warm OKLCH)
 * nav: N6 masthead · footer: Ft4 colophon · design-system: design.md · designed-as-app
 * pre-emit critique: P5 H5 E4 S5 R5 V5
 * A warm editorial "almanac" reskin of the shared Drafting Table system:
 * Fraunces + Newsreader + IBM Plex Mono, ivory paper, oxblood ink accent.
 * Every class name is preserved — this is a token + component reskin, not a rewrite. */
@import url("print.css") print; /* shared black-on-white print / PDF rules */
@import url("prism.css");       /* Prism.js syntax highlighting (theme + slab override) */

/* ============================================================================
   DRAFTING TABLE — shared design system for the study notes
   ----------------------------------------------------------------------------
   A cool blueprint-paper aesthetic for code-dense reference reading.
   Link this from any note page and set <body data-cat="java|sql|dsa|react">.
   Everything is driven by the variables in :root, so a new subject is one
   accent swap. Legacy class aliases at the bottom let older pages adopt the
   system without rewriting their markup first.
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Fraunces:ital,opsz,wght@0,9..144,400;0,9..144,500;0,9..144,600;0,9..144,700;1,9..144,400;1,9..144,500&family=Newsreader:ital,opsz,wght@0,6..72,400;0,6..72,500;0,6..72,600;0,6..72,700;1,6..72,400;1,6..72,500&family=IBM+Plex+Mono:ital,wght@0,400;0,500;0,600;1,400&display=swap');

/* ── Tokens ───────────────────────────────────────────────────────────── */
:root {
  /* type — an editorial trio: serif display, serif text, mono for labels + code */
  --font-display: 'Fraunces', ui-serif, Georgia, 'Times New Roman', serif;
  --font-body:    'Newsreader', ui-serif, Georgia, 'Times New Roman', serif;
  --font-mono:    'IBM Plex Mono', ui-monospace, 'SFMono-Regular', Menlo, monospace;

  /* paper + ink — warm ivory stock, sepia-black ink */
  --paper:        oklch(96.5% 0.015 85);
  --paper-2:      oklch(93.8% 0.019 82);   /* recessed wells */
  --card:         oklch(98.4% 0.010 88);   /* raised surfaces */
  --ink:          oklch(27% 0.022 55);     /* primary text */
  --ink-soft:     oklch(43% 0.024 52);     /* secondary text */
  --ink-faint:    oklch(57% 0.022 58);     /* captions, meta */
  --hairline:     oklch(86% 0.018 78);
  --hairline-2:   oklch(90% 0.015 82);
  --grid:         oklch(50% 0.02 60 / 0.05);

  /* the ink slab used for code — warm espresso, not cold navy */
  --slab:         oklch(26% 0.020 55);
  --slab-line:    oklch(21% 0.018 52);
  --slab-text:    oklch(90% 0.014 82);

  /* per-subject accent — overridden by [data-cat] below (default: oxblood) */
  --accent:       oklch(47% 0.13 30);
  --accent-soft:  oklch(47% 0.13 30 / 0.12);
  --accent-line:  oklch(47% 0.13 30 / 0.30);

  /* semantic callout hues (stable across subjects) */
  --note:    oklch(50% 0.09 235);  --note-bg:    oklch(50% 0.09 235 / 0.10);
  --tip:     oklch(48% 0.10 150);  --tip-bg:     oklch(48% 0.10 150 / 0.10);
  --warn:    oklch(56% 0.11 62);   --warn-bg:    oklch(56% 0.11 62 / 0.12);
  --danger:  oklch(51% 0.15 28);   --danger-bg:  oklch(51% 0.15 28 / 0.10);
  --muse:    oklch(52% 0.13 300);  --muse-bg:    oklch(52% 0.13 300 / 0.10);

  /* code tokens (on the espresso slab) */
  --tk-com:  oklch(62% 0.02 60);   --tk-kw:   oklch(70% 0.13 28);   --tk-type: oklch(74% 0.09 185);
  --tk-str:  oklch(76% 0.12 128);  --tk-fn:   oklch(80% 0.12 74);   --tk-num:  oklch(74% 0.13 45);
  --tk-punc: oklch(70% 0.02 60);

  /* surface highlights + inline code (flip in dark mode) */
  --vignette:  oklch(100% 0 0 / 0.55);
  --edge-hi:   oklch(100% 0 0 / 0.5);
  --inline-bg: oklch(45% 0.03 55 / 0.09);

  --maxw: 940px;
  --rail: 232px;
  --radius: 8px;
  --radius-sm: 5px;
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

/* per-subject inks — retuned as printed almanac inks in the warm palette */
[data-cat="java"]  { --accent:oklch(56% 0.11 66);  --accent-soft:oklch(56% 0.11 66 / 0.13);  --accent-line:oklch(56% 0.11 66 / 0.30); }
[data-cat="sql"]   { --accent:oklch(52% 0.085 205); --accent-soft:oklch(52% 0.085 205 / 0.13); --accent-line:oklch(52% 0.085 205 / 0.30); }
[data-cat="dsa"]   { --accent:oklch(50% 0.11 150); --accent-soft:oklch(50% 0.11 150 / 0.13);  --accent-line:oklch(50% 0.11 150 / 0.30); }
[data-cat="react"] { --accent:oklch(53% 0.10 245); --accent-soft:oklch(53% 0.10 245 / 0.13);  --accent-line:oklch(53% 0.10 245 / 0.30); }
[data-cat="fsd"]   { --accent:oklch(49% 0.12 353); --accent-soft:oklch(49% 0.12 353 / 0.13);  --accent-line:oklch(49% 0.12 353 / 0.30); }
[data-cat="js"]    { --accent:oklch(58% 0.11 82);  --accent-soft:oklch(58% 0.11 82 / 0.14);   --accent-line:oklch(58% 0.11 82 / 0.32); }
[data-cat="projects"] { --accent:oklch(55% 0.15 45); --accent-soft:oklch(55% 0.15 45 / 0.13); --accent-line:oklch(55% 0.15 45 / 0.30); }
[data-cat="ai"]    { --accent:oklch(52% 0.14 300); --accent-soft:oklch(52% 0.14 300 / 0.13);  --accent-line:oklch(52% 0.14 300 / 0.32); }
[data-cat="sd"]    { --accent:oklch(51% 0.085 190); --accent-soft:oklch(51% 0.085 190 / 0.13); --accent-line:oklch(51% 0.085 190 / 0.30); }
[data-cat="python"] { --accent:oklch(51% 0.095 255); --accent-soft:oklch(51% 0.095 255 / 0.13); --accent-line:oklch(51% 0.095 255 / 0.30); }
[data-cat="bbg"]   { --accent:oklch(48% 0.13 285); --accent-soft:oklch(48% 0.13 285 / 0.13); --accent-line:oklch(48% 0.13 285 / 0.30); }
[data-cat="finance"] { --accent:oklch(50% 0.10 195); --accent-soft:oklch(50% 0.10 195 / 0.13); --accent-line:oklch(50% 0.10 195 / 0.30); }

/* ── Dark mode — remap the surface tokens; everything else inherits ────── */
[data-theme="dark"] {
  --paper:oklch(22% 0.014 62); --paper-2:oklch(19% 0.013 60); --card:oklch(26% 0.015 62);
  --ink:oklch(91% 0.014 85); --ink-soft:oklch(74% 0.016 78); --ink-faint:oklch(60% 0.016 72);
  --hairline:oklch(35% 0.015 60); --hairline-2:oklch(31% 0.014 58);
  --grid:oklch(80% 0.02 80 / 0.05);
  --slab:oklch(17% 0.012 55); --slab-line:oklch(13% 0.010 52); --slab-text:oklch(90% 0.014 82);
  --vignette:oklch(75% 0.06 70 / 0.08);
  --edge-hi:oklch(100% 0 0 / 0.04);
  --inline-bg:oklch(85% 0.03 80 / 0.10);
  --accent:oklch(67% 0.14 38); --accent-soft:oklch(67% 0.14 38 / 0.16); --accent-line:oklch(67% 0.14 38 / 0.34);
}
/* brightened per-subject inks for legibility on dark stock */
[data-theme="dark"][data-cat="java"]     { --accent:oklch(78% 0.12 74);  --accent-soft:oklch(78% 0.12 74 / 0.16);  --accent-line:oklch(78% 0.12 74 / 0.34); }
[data-theme="dark"][data-cat="sql"]      { --accent:oklch(74% 0.10 200); --accent-soft:oklch(74% 0.10 200 / 0.16); --accent-line:oklch(74% 0.10 200 / 0.34); }
[data-theme="dark"][data-cat="dsa"]      { --accent:oklch(76% 0.14 150); --accent-soft:oklch(76% 0.14 150 / 0.16); --accent-line:oklch(76% 0.14 150 / 0.34); }
[data-theme="dark"][data-cat="react"]    { --accent:oklch(74% 0.11 245); --accent-soft:oklch(74% 0.11 245 / 0.16); --accent-line:oklch(74% 0.11 245 / 0.34); }
[data-theme="dark"][data-cat="fsd"]      { --accent:oklch(74% 0.13 350); --accent-soft:oklch(74% 0.13 350 / 0.16); --accent-line:oklch(74% 0.13 350 / 0.34); }
[data-theme="dark"][data-cat="js"]       { --accent:oklch(82% 0.13 85);  --accent-soft:oklch(82% 0.13 85 / 0.16);  --accent-line:oklch(82% 0.13 85 / 0.34); }
[data-theme="dark"][data-cat="projects"] { --accent:oklch(74% 0.15 48);  --accent-soft:oklch(74% 0.15 48 / 0.16);  --accent-line:oklch(74% 0.15 48 / 0.34); }
[data-theme="dark"][data-cat="ai"]       { --accent:oklch(76% 0.14 300); --accent-soft:oklch(76% 0.14 300 / 0.16); --accent-line:oklch(76% 0.14 300 / 0.34); }
[data-theme="dark"][data-cat="sd"]       { --accent:oklch(74% 0.10 190); --accent-soft:oklch(74% 0.10 190 / 0.16); --accent-line:oklch(74% 0.10 190 / 0.34); }
[data-theme="dark"][data-cat="python"]   { --accent:oklch(73% 0.11 255); --accent-soft:oklch(73% 0.11 255 / 0.16); --accent-line:oklch(73% 0.11 255 / 0.34); }
[data-theme="dark"][data-cat="bbg"]      { --accent:oklch(75% 0.13 285); --accent-soft:oklch(75% 0.13 285 / 0.16); --accent-line:oklch(75% 0.13 285 / 0.34); }
[data-theme="dark"][data-cat="finance"]  { --accent:oklch(74% 0.11 195); --accent-soft:oklch(74% 0.11 195 / 0.16); --accent-line:oklch(74% 0.11 195 / 0.34); }

/* ── Theme toggle (injected by notes.js into the top bar / masthead) ───── */
.theme-toggle {
  display:inline-flex; align-items:center; justify-content:center; flex:none;
  width:34px; height:34px; padding:0; cursor:pointer;
  color:var(--ink-soft); background:var(--card);
  border:1px solid var(--hairline); border-radius:8px;
  transition:color .2s var(--ease), border-color .2s var(--ease), background .2s var(--ease), transform .2s var(--ease);
}
.theme-toggle:hover { color:var(--accent); border-color:var(--accent-line); transform:translateY(-1px); }
.theme-toggle svg { width:16px; height:16px; }

/* ── Bookmark: pin button (topbar), one global pinned spot ─────────────── */
.pin-toggle {
  display:inline-flex; align-items:center; justify-content:center; flex:none;
  width:34px; height:34px; padding:0; cursor:pointer;
  color:var(--ink-soft); background:var(--card);
  border:1px solid var(--hairline); border-radius:8px;
  transition:color .2s var(--ease), border-color .2s var(--ease), background .2s var(--ease), transform .2s var(--ease);
}
.pin-toggle:hover { color:var(--accent); border-color:var(--accent-line); transform:translateY(-1px); }
.pin-toggle svg { width:16px; height:16px; }
.pin-toggle.active { color:var(--accent); background:var(--accent-soft); border-color:var(--accent-line); }
.pin-toggle.active svg path, .pin-toggle.active svg circle { fill:currentColor; }

/* ── Bookmark: floating resume chip (auto last-visit / manual pin) ─────── */
.resume-chip {
  position:fixed; left:16px; bottom:18px; z-index:59;
  display:inline-flex; align-items:center; gap:9px;
  max-width:min(80vw, 360px);
  padding:8px 9px 8px 13px;
  background:var(--card); border:1px solid var(--hairline); border-radius:999px;
  box-shadow:0 14px 30px -18px rgba(0,0,0,0.35);
  text-decoration:none; color:var(--ink);
  animation:resume-in .32s var(--ease);
}
.resume-chip:hover { border-color:var(--accent-line); transform:translateY(-2px); }
.resume-chip svg { width:15px; height:15px; flex:none; color:var(--accent); }
.resume-chip .rc-text { min-width:0; overflow:hidden; }
.resume-chip .rc-kind { display:block; font:600 0.6rem/1 var(--font-mono); letter-spacing:0.08em; text-transform:uppercase; color:var(--ink-faint); margin-bottom:2px; }
.resume-chip .rc-label { display:block; font:500 0.82rem/1.3 var(--font-body); overflow:hidden; text-overflow:ellipsis; white-space:nowrap; }
.resume-chip .rc-close {
  flex:none; width:22px; height:22px; display:inline-flex; align-items:center; justify-content:center;
  color:var(--ink-faint); border-radius:50%; margin-left:2px; background:none; border:0; cursor:pointer;
}
.resume-chip .rc-close:hover { color:var(--ink); background:var(--paper-2); }
.resume-chip .rc-close svg { width:12px; height:12px; color:inherit; }
@keyframes resume-in { from { opacity:0; transform:translateY(8px); } to { opacity:1; transform:none; } }
@media print { .resume-chip, .pin-toggle { display:none !important; } }

/* ── Bookmark: bigger inline "continue reading" card (index page) ──────── */
.resume-card {
  display:flex; align-items:center; gap:16px; flex-wrap:wrap;
  padding:18px 22px; background:var(--card); border:1px solid var(--accent-line);
  border-radius:var(--radius); text-decoration:none; color:inherit;
  transition:border-color .2s var(--ease), transform .2s var(--ease), box-shadow .2s var(--ease);
}
.resume-card + .resume-card { margin-top:12px; }
.resume-card:hover { transform:translateY(-2px); box-shadow:0 16px 36px -26px rgba(52,38,26,0.55); }
.resume-card .rc-ico { flex:none; display:inline-flex; align-items:center; justify-content:center; width:38px; height:38px; border-radius:9px; background:var(--accent-soft); color:var(--accent); }
.resume-card .rc-ico svg { width:18px; height:18px; }
.resume-card .rc-body { flex:1; min-width:0; }
.resume-card .rc-kind { display:block; font:600 0.68rem/1 var(--font-mono); letter-spacing:0.1em; text-transform:uppercase; color:var(--accent); margin-bottom:4px; }
.resume-card .rc-title { font-family:var(--font-display); font-weight:600; font-size:1.05rem; color:var(--ink); }
.resume-card .rc-go { flex:none; display:inline-flex; align-items:center; gap:6px; font:500 0.78rem/1 var(--font-mono); color:var(--accent); }
.resume-card .rc-go svg { width:13px; height:13px; }
#resume-slot:empty { display:none; }
#resume-slot { margin-bottom:clamp(28px,5vw,40px); }

/* ── Reset ────────────────────────────────────────────────────────────── */
*, *::before, *::after { margin:0; padding:0; box-sizing:border-box; }

html { scroll-behavior:smooth; scroll-padding-top:84px; }

body {
  font-family:var(--font-body);
  color:var(--ink);
  background-color:var(--paper);
  /* warm paper stock + a soft top-light — no cold blueprint grid */
  background-image:
    radial-gradient(125% 78% at 50% -8%, var(--vignette), transparent 62%);
  background-attachment: fixed;
  font-size:1.02rem;
  line-height:1.72;
  font-optical-sizing:auto;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  text-rendering:optimizeLegibility;
}

/* ── Top bar (the bound edge) ─────────────────────────────────────────── */
.topbar {
  position:sticky; top:0; z-index:50;
  display:flex; align-items:center; gap:14px;
  /* keep the bar full-bleed, but align its contents to the centered reading
     column so the back-link sits directly above the body text */
  padding-block:13px;
  padding-inline:calc(max((100% - var(--maxw)) / 2, 0px) + clamp(18px, 5vw, 40px));
  background:color-mix(in srgb, var(--paper) 86%, transparent);
  backdrop-filter:saturate(1.4) blur(10px);
  -webkit-backdrop-filter:saturate(1.4) blur(10px);
  border-bottom:1px solid var(--hairline);
  box-shadow:0 1px 0 var(--edge-hi) inset, 0 -3px 0 var(--accent) inset;
}
.topbar a.home {
  display:inline-flex; align-items:center; gap:7px;
  font:500 0.82rem/1 var(--font-body);
  color:var(--ink-soft); text-decoration:none;
  padding:6px 11px 6px 8px; border-radius:8px;
  border:1px solid transparent;
  transition:background .2s var(--ease), border-color .2s var(--ease), color .2s var(--ease), transform .2s var(--ease);
}
.topbar a.home:hover { background:var(--card); border-color:var(--hairline); color:var(--ink); }
.topbar a.home svg { width:14px; height:14px; transition:transform .2s var(--ease); }
.topbar a.home:hover svg { transform:translateX(-2px); }

.crumb {
  display:flex; align-items:center; gap:8px;
  font:500 0.74rem/1 var(--font-mono);
  letter-spacing:0.02em; color:var(--ink-faint);
  text-transform:uppercase; overflow:hidden; white-space:nowrap;
}
.crumb .sep { opacity:0.45; }
.crumb .here { color:var(--ink); }
.crumb .tab {
  color:var(--accent); border:1px solid var(--accent-line);
  background:var(--accent-soft); border-radius:5px; padding:3px 7px;
  letter-spacing:0.08em;
}
.topbar .spacer { flex:1; }

/* ── Page frame ───────────────────────────────────────────────────────── */
.sheet { position:relative; z-index:1; }

.doc {
  max-width:var(--maxw);
  margin:0 auto;
  padding:clamp(40px, 7vw, 76px) clamp(18px, 5vw, 40px) 120px;
}

/* ── Document header ──────────────────────────────────────────────────── */
.doc-head { margin-bottom:clamp(34px, 6vw, 56px); }
.eyebrow {
  display:inline-flex; align-items:center; gap:8px;
  font:600 0.7rem/1 var(--font-mono);
  letter-spacing:0.18em; text-transform:uppercase; color:var(--accent);
  margin-bottom:18px;
}
.eyebrow::before { content:""; width:22px; height:1.5px; background:var(--accent); display:inline-block; }
.doc-head h1, h1.title {
  font-family:var(--font-display); font-weight:600;
  font-size:clamp(2rem, 4.6vw, 3.1rem); line-height:1.08;
  letter-spacing:-0.02em; color:var(--ink); text-wrap:balance;
}
.doc-head .sub, p.dek {
  margin-top:16px; font-size:1.02rem; color:var(--ink-soft);
  max-width:66ch; line-height:1.6;
}
.doc-head .meta {
  margin-top:22px; display:flex; flex-wrap:wrap; gap:8px 18px;
  font:500 0.74rem/1 var(--font-mono); color:var(--ink-faint);
}
.doc-head .meta b { color:var(--ink-soft); font-weight:600; }

/* ── Typographic flow ─────────────────────────────────────────────────── */
.doc p { margin:0 0 1.1em; max-width:74ch; }
.doc h2, .doc h3, .doc h4 { font-family:var(--font-display); letter-spacing:-0.01em; color:var(--ink); scroll-margin-top:84px; }
.doc h2 { font-size:1.55rem; font-weight:600; margin:2.4em 0 0.7em; line-height:1.2; }
.doc h3 { font-size:1.2rem;  font-weight:600; margin:1.9em 0 0.5em; }
.doc h4 { font-size:1.02rem; font-weight:600; margin:1.5em 0 0.4em; }
.doc a { color:var(--accent); text-underline-offset:3px; text-decoration-thickness:1px; }
.doc strong, .doc b { color:var(--ink); font-weight:600; }
.doc em { color:var(--ink-soft); }
.doc ul, .doc ol { margin:0 0 1.2em 1.3em; }
.doc li { margin:0.35em 0; padding-left:0.2em; }
.doc li::marker { color:var(--accent); }
.doc hr, .divider {
  border:0; height:1px; background:var(--hairline);
  margin:3em 0; position:relative;
}
.doc hr::after, .divider::after {
  content:""; position:absolute; left:0; top:-0.5px; width:48px; height:2px; background:var(--accent);
}

/* lede paragraph */
.lede, p.lede { font-size:1.08rem; color:var(--ink-soft); line-height:1.6; max-width:68ch; }

/* ── Drafting section marker ──────────────────────────────────────────── */
/* <div class="sec-head"><span class="sec-num">1.2</span><h4>Title</h4></div> */
.sec-head { display:flex; align-items:center; gap:14px; margin:2.4em 0 0.8em; }
.sec-head h2, .sec-head h3, .sec-head h4 { margin:0; }
.sec-num {
  flex-shrink:0; position:relative;
  display:inline-flex; align-items:center; justify-content:center;
  min-width:2.3em; height:2.3em; padding:0 0.5em;
  font:600 0.82rem/1 var(--font-mono);
  color:var(--accent); background:var(--card);
  border:1.5px solid var(--accent-line); border-radius:999px;
}
.sec-num::after { /* leader line into the title */
  content:""; position:absolute; right:-12px; top:50%;
  width:10px; height:1.5px; background:var(--accent-line);
}

/* ── Code: ink slab on paper ──────────────────────────────────────────── */
.doc pre, pre.code, .code-block {
  position:relative;
  background:var(--slab); color:var(--slab-text);
  border:1px solid var(--slab-line); border-radius:var(--radius);
  padding:18px 20px; margin:1.4em 0; overflow:auto;
  font-family:var(--font-mono); font-size:0.86rem; line-height:1.7;
  box-shadow:0 1px 0 rgba(255,255,255,0.4), 0 14px 30px -22px rgba(40,28,18,0.55);
  tab-size:4;
}
.doc pre::before { /* drafting label on the slab */
  content:attr(data-lang); position:absolute; top:10px; right:14px;
  font-size:0.62rem; letter-spacing:0.12em; text-transform:uppercase;
  color:var(--tk-com); pointer-events:none;
}
.doc pre code { background:none; border:0; padding:0; color:inherit; font-size:inherit; }

/* inline code */
.doc :not(pre) > code, code.inl, .inline {
  font-family:var(--font-mono); font-size:0.86em;
  background:var(--inline-bg); color:var(--ink);
  border:1px solid var(--hairline-2); border-radius:5px; padding:0.08em 0.4em;
  overflow-wrap:anywhere;   /* long inline code wraps instead of blowing out mobile width */
}

/* code token colors */
.tok-com, .c, .comment { color:var(--tk-com); font-style:italic; }
.tok-kw,  .kw, .k, .keyword { color:var(--tk-kw); }
.tok-type,.t, .type  { color:var(--tk-type); }
.tok-str, .s, .str, .string { color:var(--tk-str); }
.tok-fn,  .fn, .m, .func { color:var(--tk-fn); }
.tok-num, .n, .num   { color:var(--tk-num); }
.tok-punc,.p, .punc  { color:var(--tk-punc); }

/* copy button injected by notes.js */
.copy-btn {
  position:absolute; top:8px; right:10px;
  font:500 0.66rem/1 var(--font-mono); letter-spacing:0.04em;
  color:var(--tk-com); background:rgba(255,255,255,0.06);
  border:1px solid rgba(255,255,255,0.12); border-radius:6px;
  padding:5px 9px; cursor:pointer; opacity:0; transform:translateY(-2px);
  transition:opacity .18s var(--ease), color .18s var(--ease), background .18s var(--ease), transform .18s var(--ease);
}
.doc pre:hover .copy-btn { opacity:1; transform:none; }
.copy-btn:hover { color:#fff; background:rgba(255,255,255,0.14); }
.copy-btn.copied { color:var(--tk-str); }
.doc pre[data-lang] .copy-btn { top:30px; }

/* ── Callouts ─────────────────────────────────────────────────────────── */
.callout, .note, .tip, .warn, .danger, .analogy, .gotcha {
  position:relative; margin:1.5em 0; padding:16px 18px 16px 20px;
  background:var(--card); border:1px solid var(--hairline);
  border-left:3px solid var(--accent); border-radius:10px;
}
.callout > :last-child, .note > :last-child, .tip > :last-child,
.warn > :last-child, .danger > :last-child, .analogy > :last-child, .gotcha > :last-child { margin-bottom:0; }
.callout .k, .note .k, .tip .k, .warn .k, .danger .k, .analogy .k, .gotcha .k,
.callout[data-tag]::before {
  display:block; font:600 0.68rem/1 var(--font-mono);
  letter-spacing:0.1em; text-transform:uppercase; margin-bottom:8px; color:var(--accent);
}
.callout[data-tag]::before { content:attr(data-tag); }
.note   { border-left-color:var(--note);   background:var(--note-bg); }   .note .k   { color:var(--note); }
.tip    { border-left-color:var(--tip);    background:var(--tip-bg); }    .tip .k    { color:var(--tip); }
.warn   { border-left-color:var(--warn);   background:var(--warn-bg); }   .warn .k   { color:var(--warn); }
.danger { border-left-color:var(--danger); background:var(--danger-bg); } .danger .k { color:var(--danger); }
.analogy{ border-left-color:var(--muse);   background:var(--muse-bg); }   .analogy .k{ color:var(--muse); }

/* the headline takeaway */
.crux {
  margin:1.8em 0; padding:22px 24px;
  background:linear-gradient(180deg, var(--card), var(--paper-2));
  border:1px solid var(--hairline); border-radius:var(--radius);
  box-shadow:0 1px 0 var(--edge-hi) inset;
  font-size:1.06rem; line-height:1.6;
}
.crux[data-tag]::before {
  content:attr(data-tag); display:block;
  font:600 0.68rem/1 var(--font-mono); letter-spacing:0.1em;
  text-transform:uppercase; color:var(--accent); margin-bottom:10px;
}
.crux b { color:var(--accent); }
.grn { color:var(--tip); font-weight:600; }

/* ── Card grids ───────────────────────────────────────────────────────── */
.grid { display:grid; gap:14px; margin:1.5em 0; }
.grid.two   { grid-template-columns:repeat(2, 1fr); }
.grid.three { grid-template-columns:repeat(3, 1fr); }
@media (max-width:640px){ .grid.two, .grid.three { grid-template-columns:1fr; } }
.card {
  background:var(--card); border:1px solid var(--hairline);
  border-radius:10px; padding:16px 18px;
  transition:border-color .2s var(--ease), transform .2s var(--ease), box-shadow .2s var(--ease);
}
.card:hover { border-color:var(--accent-line); transform:translateY(-2px); box-shadow:0 10px 26px -20px rgba(52,38,26,0.5); }
.card .k { font:600 0.66rem/1 var(--font-mono); letter-spacing:0.1em; text-transform:uppercase; color:var(--accent); margin-bottom:9px; display:block; }
.card h5 { font-family:var(--font-display); font-size:1rem; font-weight:600; margin-bottom:6px; color:var(--ink); }
.card p { font-size:0.9rem; color:var(--ink-soft); margin:0; }

/* ── Versus / compare ─────────────────────────────────────────────────── */
.vs { display:grid; grid-template-columns:1fr 1fr; gap:14px; margin:1.5em 0; align-items:stretch; position:relative; }
@media (max-width:640px){ .vs { grid-template-columns:1fr; } }
.vs > * { background:var(--card); border:1px solid var(--hairline); border-radius:10px; padding:16px 18px; }
.vs > :first-child { border-top:2px solid var(--note); }
.vs > :last-child  { border-top:2px solid var(--warn); }

/* ── Flow / pipeline ──────────────────────────────────────────────────── */
.flow { display:flex; flex-wrap:wrap; align-items:center; gap:8px; margin:1.4em 0; }
.flow > span {
  font:500 0.84rem/1.3 var(--font-mono);
  background:var(--card); border:1px solid var(--hairline);
  border-radius:8px; padding:8px 12px; color:var(--ink);
}
.flow > span:not(:last-child)::after { content:"→"; margin-left:10px; color:var(--accent); }

/* ── Tables ───────────────────────────────────────────────────────────── */
.doc table, table.data-table {
  width:100%; border-collapse:collapse; margin:1.5em 0;
  font-size:0.9rem; background:var(--card);
  border:1px solid var(--hairline); border-radius:10px; overflow:hidden;
}
.doc th, .doc td, .data-table th, .data-table td { text-align:left; padding:10px 14px; border-bottom:1px solid var(--hairline-2); }
.doc thead th, .data-table thead th {
  font:600 0.72rem/1.2 var(--font-mono); letter-spacing:0.06em;
  text-transform:uppercase; color:var(--ink-soft);
  background:var(--paper-2); border-bottom:1.5px solid var(--accent-line);
}
.doc tbody tr:last-child td { border-bottom:0; }
.doc tbody tr:hover td { background:rgba(52,38,26,0.025); }

/* ── Pills (one-line recall) ──────────────────────────────────────────── */
.pill-row { display:flex; flex-wrap:wrap; gap:8px; margin:1.4em 0; }
.pill {
  font:500 0.76rem/1 var(--font-mono);
  color:var(--ink-soft); background:var(--card);
  border:1px solid var(--hairline); border-radius:999px; padding:7px 13px;
}
.pill:hover { border-color:var(--accent-line); color:var(--ink); }

/* ── Q&A ──────────────────────────────────────────────────────────────── */
.qa-head { display:flex; align-items:center; gap:14px; margin:2.4em 0 1em; }
.qa-head h4 { margin:0; }
details.qa {
  background:var(--card); border:1px solid var(--hairline);
  border-radius:10px; margin:10px 0; overflow:hidden;
  transition:border-color .2s var(--ease);
}
details.qa[open] { border-color:var(--accent-line); }
details.qa summary {
  list-style:none; cursor:pointer; padding:14px 18px;
  display:flex; gap:10px; align-items:flex-start;
  font-weight:500; color:var(--ink);
}
details.qa summary::-webkit-details-marker { display:none; }
details.qa summary::after {
  content:"+"; margin-left:auto; color:var(--accent);
  font-family:var(--font-mono); font-size:1.1rem; line-height:1;
  transition:transform .2s var(--ease);
}
details.qa[open] summary::after { transform:rotate(45deg); }
.qmark { color:var(--accent); font:600 0.84rem/1.5 var(--font-mono); flex-shrink:0; }
details.qa .ans { padding:0 18px 16px 40px; color:var(--ink-soft); }
details.qa .ans > :last-child { margin-bottom:0; }

/* ── Quick-nav: always-in-view section jumper (built by notes.js) ─────── */
.quicknav { position:fixed; z-index:60; }
.qn-toggle { display:none; }
.qn-item { text-decoration:none; }
.qn-label { color:var(--ink-soft); }

/* Wide: a draughtsman's tick-rail pinned to the right edge.
   Current section is labelled; hovering the rail reveals every label. */
@media (min-width:1240px) {
  .quicknav { top:50%; right:20px; transform:translateY(-50%); max-height:82vh; }
  .qn-list { list-style:none; margin:0; padding:6px 0; display:flex; flex-direction:column; gap:4px;
             align-items:flex-end; max-height:82vh; overflow:auto; scrollbar-width:none; }
  .qn-list::-webkit-scrollbar { display:none; }
  .qn-item { display:flex; align-items:center; justify-content:flex-end; gap:11px; height:18px; }
  .qn-label {
    font:500 0.76rem/1 var(--font-mono); letter-spacing:-0.01em;
    max-width:0; opacity:0; overflow:hidden; white-space:nowrap; text-overflow:ellipsis;
    background:var(--card); border:1px solid transparent; border-radius:7px; padding:0;
    transition:max-width .26s var(--ease), opacity .2s var(--ease), padding .2s var(--ease),
               color .2s var(--ease), border-color .2s var(--ease);
  }
  /* a quiet column of ticks; the label is revealed only for the active
     section and for whichever tick you point at — never the whole stack */
  .qn-tick { flex-shrink:0; width:14px; height:2px; border-radius:2px; background:var(--hairline);
             opacity:0.7; transition:width .2s var(--ease), background .2s var(--ease), opacity .2s var(--ease); }
  .qn-item.lvl-3 .qn-tick { width:8px; }
  .quicknav:hover .qn-tick { opacity:1; }
  .qn-item:hover .qn-tick { background:var(--accent); opacity:1; }
  .qn-item:hover .qn-label { max-width:230px; opacity:1; padding:5px 9px; color:var(--ink);
    border-color:var(--hairline); box-shadow:0 8px 22px -14px rgba(52,38,26,0.45); }
  .qn-item.active .qn-tick { width:24px; background:var(--accent); opacity:1; }
  .qn-item.active .qn-label { max-width:210px; opacity:1; padding:5px 9px; color:var(--ink); border-color:var(--hairline); }
}

/* Narrow: a floating "Sections" button that opens a jump panel. */
@media (max-width:1239px) {
  .quicknav { right:16px; bottom:18px; display:flex; flex-direction:column; align-items:flex-end; gap:10px; }
  .qn-toggle {
    display:inline-flex; align-items:center; gap:8px; cursor:pointer;
    font:600 0.78rem/1 var(--font-body); color:#fff;
    background:var(--accent); border:0; border-radius:999px; padding:11px 16px;
    box-shadow:0 10px 26px -10px var(--accent-line), 0 2px 6px rgba(52,38,26,0.2);
  }
  .qn-ico { font-size:1rem; line-height:1; }
  .qn-list {
    order:-1; list-style:none; margin:0; display:none; flex-direction:column; gap:1px;
    background:var(--card); border:1px solid var(--hairline); border-radius:14px; padding:8px;
    min-width:210px; max-width:76vw; max-height:60vh; overflow:auto;
    box-shadow:0 20px 48px -18px rgba(52,38,26,0.55);
  }
  .quicknav.open .qn-list { display:flex; }
  .qn-item { display:flex; align-items:center; gap:10px; padding:9px 11px; border-radius:9px; }
  .qn-item:hover { background:var(--paper-2); }
  .qn-tick { order:-1; flex-shrink:0; width:8px; height:8px; border-radius:50%; background:var(--hairline); }
  .qn-item.lvl-3 { padding-left:24px; }
  .qn-label { font:500 0.86rem/1.3 var(--font-body); }
  .qn-item.active .qn-tick { background:var(--accent); }
  .qn-item.active .qn-label { color:var(--accent); font-weight:600; }
}

@media print { .quicknav { display:none !important; } }

/* ── Footer ───────────────────────────────────────────────────────────── */
.doc-foot {
  max-width:var(--maxw); margin:0 auto; padding:28px clamp(18px,5vw,40px) 64px;
  border-top:1px solid var(--hairline);
  display:flex; flex-wrap:wrap; gap:14px; align-items:center; justify-content:space-between;
  font:500 0.76rem/1.5 var(--font-mono); color:var(--ink-faint);
}
.doc-foot a { color:var(--ink-soft); text-decoration:none; }
.doc-foot a:hover { color:var(--accent); }

/* ── Quality floor ────────────────────────────────────────────────────── */
:focus-visible { outline:2px solid var(--accent); outline-offset:2px; border-radius:4px; }
::selection { background:var(--accent-soft); }
/* overflow-x:hidden on body only — setting it on html too makes both html
   and body overflow containers, which breaks position:sticky (topbar,
   quick-nav, pin button, resume chip) as soon as the page scrolls */
body { overflow-x:hidden; max-width:100%; }
html { max-width:100%; }
.eyebrow { flex-wrap:wrap; max-width:100%; }
@media (max-width:560px) {
  .eyebrow { letter-spacing:0.1em; font-size:0.64rem; }
  .eyebrow::before { width:16px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior:auto; }
  *, *::before, *::after { animation-duration:0.001ms !important; transition-duration:0.001ms !important; }
}

@media print {
  body { background:#fff; }
  .topbar, .toc, .copy-btn { display:none !important; }
  .doc, .doc.has-toc { display:block; max-width:none; padding:0; }
  .doc pre { background:#f4f6f7; color:#15212e; border:1px solid #ccc; box-shadow:none; }
  .tok-com,.c{color:#5a6b78}.tok-kw,.kw,.k{color:#1f4e79}.tok-type,.t{color:#0f6f63}
  .tok-str,.s{color:#3d6b1f}.tok-fn,.fn,.m{color:#9a6a12}.tok-num,.n{color:#a4502f}
}

/* ============================================================================
   LEGACY ALIASES — let pre-existing pages adopt the system before their
   markup is normalized. Safe to delete a block once a page is converted.
   ========================================================================== */

/* SQL page (was light/serif) */
.topic { margin-top:2.6em; }
.hl { background:var(--accent-soft); color:var(--ink); padding:0.05em 0.35em; border-radius:4px; font-weight:600; }
.result-wrap { margin:1.2em 0; }
.result-label { font:600 0.68rem/1 var(--font-mono); letter-spacing:0.1em; text-transform:uppercase; color:var(--ink-faint); margin-bottom:6px; display:block; }
.result { background:var(--card); border:1px solid var(--hairline); border-radius:8px; overflow:auto; }
.hw-subtitle { color:var(--ink-soft); font-style:italic; }
.section-header { display:flex; align-items:center; gap:14px; margin:2.6em 0 0.9em; }
.section-header h2 { margin:0; }
.section-num {
  flex-shrink:0; display:inline-flex; align-items:center; justify-content:center;
  width:2.3em; height:2.3em; border-radius:999px; border:1.5px solid var(--accent-line);
  background:var(--card); color:var(--accent); font:600 0.9rem/1 var(--font-mono);
}
.code-block { padding:0; overflow:hidden; }
.code-block .code-label {
  display:block; background:var(--slab-line); color:var(--tk-com);
  font:600 0.66rem/1 var(--font-mono); letter-spacing:0.08em; text-transform:uppercase;
  padding:9px 16px;
}
.code-block code, .code-block > code {
  display:block; white-space:pre; overflow:auto; padding:14px 16px; margin:0;
  font-family:var(--font-mono); font-size:0.84rem; line-height:1.6;
  color:var(--slab-text); background:none; border:0;
}
.null { color:var(--tk-com); font-style:italic; }
.code-block .keyword { color:var(--tk-kw); }
.source { color:var(--ink-faint); font-size:0.85rem; font-style:italic; }
/* SQL inner contents card */
#typedView > .toc { background:var(--card); border:1px solid var(--hairline); border-radius:12px; padding:18px 22px; margin:0 0 2.4em; }
.toc-part-label { font:600 0.66rem/1 var(--font-mono); letter-spacing:0.1em; text-transform:uppercase; color:var(--accent); margin:16px 0 8px; }
.toc-part-label:first-child { margin-top:0; }
.toc-list { list-style:none; margin:0; padding:0; display:grid; grid-template-columns:repeat(auto-fill,minmax(230px,1fr)); gap:1px 18px; }
.toc-item { cursor:pointer; padding:5px 0; color:var(--ink-soft); font-size:0.9rem; display:flex; align-items:center; gap:9px; }
.toc-item:hover { color:var(--accent); }
.toc-tag { flex-shrink:0; display:inline-flex; align-items:center; justify-content:center; min-width:21px; height:21px; border-radius:6px; background:var(--accent-soft); color:var(--accent); border:1px solid var(--accent-line); font:600 0.66rem/1 var(--font-mono); }
/* collapsible sample data */
.sample-data-toggle { display:flex; align-items:center; justify-content:space-between; gap:12px; width:100%; cursor:pointer; background:var(--card); border:1px solid var(--hairline); border-radius:10px; padding:12px 16px; font:600 0.92rem/1.3 var(--font-body); color:var(--ink); margin:1.2em 0; text-align:left; }
.sample-data-toggle:hover { border-color:var(--accent-line); }
.sample-data-toggle .arrow { color:var(--accent); transition:transform .2s var(--ease); }
.sample-data-toggle.open .arrow { transform:rotate(180deg); }
.sample-data-content { display:none; margin-bottom:1.6em; }
.sample-data-content.open { display:block; }

/* JDBC page (parts, roman numerals, framed code, output) */
.part { margin-top:3.5em; }
.part-head { display:flex; align-items:center; gap:16px; margin-bottom:0.5em; padding-bottom:14px; border-bottom:1px solid var(--hairline); position:relative; }
.part-head::after { content:""; position:absolute; left:0; bottom:-1px; width:60px; height:2px; background:var(--accent); }
.part-head h2 { margin:0; font-size:clamp(1.5rem,3vw,1.85rem); }
.roman {
  flex-shrink:0; display:inline-flex; align-items:center; justify-content:center;
  min-width:2.4em; height:2.4em; border-radius:999px;
  border:1.5px solid var(--accent-line); background:var(--card);
  color:var(--accent); font:600 0.95rem/1 var(--font-mono);
}
.part-desc { color:var(--ink-soft); font-size:1.02rem; max-width:66ch; margin:0 0 1.6em; }
.num { color:var(--accent); font:600 0.92em var(--font-mono); margin-right:7px; }
.claim { color:var(--ink-soft); }
.added { display:inline-block; color:var(--accent); background:var(--accent-soft); border:1px solid var(--accent-line); border-radius:4px; padding:0 5px; font:600 0.72em/1.5 var(--font-mono); }
.toc-note { color:var(--ink-faint); font-size:0.92rem; font-style:italic; }
.toc-note .xlink, .xlink { font-weight:500; }
.doodle { color:var(--muse); font:600 0.85em var(--font-mono); }
.check { color:var(--tip); font-weight:700; margin-right:6px; }
.lbl { display:inline-block; font:600 0.66rem/1 var(--font-mono); letter-spacing:0.08em; text-transform:uppercase; color:var(--ink-faint); }
.ascii {
  background:var(--slab); color:var(--slab-text);
  border:1px solid var(--slab-line); border-radius:var(--radius);
  padding:16px 18px; margin:1.4em 0; overflow:auto;
  font-family:var(--font-mono); font-size:0.82rem; line-height:1.55;
  white-space:pre-line; tab-size:4;
}
.ascii pre { margin:0; background:none; border:0; padding:0; box-shadow:none; color:inherit; white-space:pre; }
.ascii pre::before { content:none; }
.code { margin:1.4em 0; }
.code .code-head {
  display:flex; align-items:center; justify-content:space-between; gap:12px;
  background:var(--slab-line); border:1px solid var(--slab-line); border-bottom:0;
  border-radius:var(--radius) var(--radius) 0 0; padding:9px 14px;
  font:500 0.74rem/1 var(--font-mono);
}
.code .fname { color:var(--slab-text); }
.code .lang { color:var(--tk-com); text-transform:uppercase; letter-spacing:0.12em; font-size:0.62rem; }
.code .run { background:var(--slab); color:var(--tk-str); border:1px solid var(--slab-line); border-top:0; border-bottom:0; padding:8px 14px; font:0.78rem/1.5 var(--font-mono); }
.code .run::before { content:"$ "; color:var(--tk-com); }
.code pre { margin:0; border-top:0; border-radius:0 0 var(--radius) var(--radius); }
.olbl { display:block; font:600 0.66rem/1 var(--font-mono); letter-spacing:0.1em; text-transform:uppercase; color:var(--ink-faint); margin:1.2em 0 6px; }
.out { background:var(--card); border:1px solid var(--hairline); border-radius:8px; padding:12px 14px; font:0.82rem/1.6 var(--font-mono); color:var(--ink-soft); white-space:pre-wrap; overflow:auto; }

/* ============================================================================
   ROLLOUT ALIASES — map the older pages' bespoke vocabulary onto the system.
   Best-effort; anything unmapped still inherits clean semantic styling.
   ========================================================================== */

/* extra code-token schemes (Jackson/http/threads/etc.) */
.cmt, .cm, .com { color:var(--tk-com); font-style:italic; }
.kw { color:var(--tk-kw); }
.ty, .type { color:var(--tk-type); }
.st { color:var(--tk-str); }
.nm, .name, .var { color:var(--tk-fn); }
.nu { color:var(--tk-num); }
.pn, .op { color:var(--tk-punc); }

/* inline code spans used as .inl across React/Java pages */
.inl {
  font-family:var(--font-mono); font-size:0.86em;
  background:var(--inline-bg); color:var(--ink);
  border:1px solid var(--hairline-2); border-radius:5px; padding:0.08em 0.4em;
}

/* hero variants */
.subtitle, .sub, .dek { color:var(--ink-soft); }
.topic-desc { margin-top:14px; font-size:1.02rem; color:var(--ink-soft); max-width:64ch; line-height:1.6; }
h1.title, .hero h1 { font-family:var(--font-display); font-weight:600; letter-spacing:-0.02em; }

/* section heading helpers */
.sec-title { font-family:var(--font-display); font-weight:600; }
.sec-lead, .sec-sub, .sec-desc, .section-sub, .part-sub, .part-lead, .lead { color:var(--ink-soft); }
.sec-label, .part-tag, .part-eyebrow, .ep, .kicker, .k {
  font:600 0.68rem/1 var(--font-mono); letter-spacing:0.1em; text-transform:uppercase; color:var(--accent);
}

/* ledes & insight lists */
ul.insights, .insights { list-style:none; margin:1.2em 0; padding:0; }
ul.insights li, .insights li { position:relative; padding-left:20px; margin:0.5em 0; }
ul.insights li::before, .insights li::before { content:""; position:absolute; left:2px; top:0.62em; width:7px; height:7px; border-radius:50%; background:var(--accent); }

/* callout family → tinted boxes */
.matter, .note-card, .note-mini, .note-why, .why, .trade, .enrich, .think, .call {
  position:relative; margin:1.4em 0; padding:14px 16px;
  background:var(--card); border:1px solid var(--hairline); border-left:3px solid var(--accent); border-radius:10px;
}
.trick, .m-trick { color:var(--tip); }
.pit, .pitfall, .m-pit { color:var(--warn); }
.note-why .lbl, .why .lbl { color:var(--note); }

/* small inline badges / markers */
.plus, .add-marker, .tag-added, .added, .badge, .chip, .tag, .marker, .part-tag {
  display:inline-block; font:600 0.68rem/1.5 var(--font-mono); letter-spacing:0.04em;
  color:var(--accent); background:var(--accent-soft); border:1px solid var(--accent-line);
  border-radius:5px; padding:1px 7px;
}
.m-trick { color:var(--tip); background:var(--tip-bg); border-color:var(--tip); }
.m-pit { color:var(--warn); background:var(--warn-bg); border-color:var(--warn); }
.m-tip { color:var(--note); background:var(--note-bg); border-color:var(--note); }
.plus, .add-marker, .tag-added { color:var(--accent); }

/* code-block chrome variants */
.codewrap, .codecard, .code-card, .codecard, .src-wrap { margin:1.4em 0; }
.codehead, .codebar, .fhead, .fhdr, .ex-head, .exhead, .out-head, .nb-head, .code-head {
  display:flex; align-items:center; justify-content:space-between; gap:12px;
  background:var(--slab-line); border:1px solid var(--slab-line); border-bottom:0;
  border-radius:var(--radius) var(--radius) 0 0; padding:9px 14px;
  font:500 0.72rem/1 var(--font-mono); color:var(--tk-com);
}
.fname, .file { color:var(--slab-text); }
.runcmd { background:var(--slab); color:var(--tk-str); border:1px solid var(--slab-line); border-top:0; border-bottom:0; padding:8px 14px; font:0.78rem/1.5 var(--font-mono); }
.runcmd::before { content:"$ "; color:var(--tk-com); }
.codewrap pre, .codecard pre, .code-card pre, pre.src { margin:0; }
.out-card, .olab { }
.olab { display:block; font:600 0.66rem/1 var(--font-mono); letter-spacing:0.1em; text-transform:uppercase; color:var(--ink-faint); margin:1.2em 0 6px; }

/* React session blocks */
.session { margin:2.2em 0; }
.session-banner { display:flex; flex-wrap:wrap; align-items:center; gap:12px; margin-bottom:0.6em; padding-bottom:14px; border-bottom:1px solid var(--hairline); position:relative; }
.session-banner::after { content:""; position:absolute; left:0; bottom:-1px; width:54px; height:2px; background:var(--accent); }
.session-banner h2 { margin:0; }
.tl { width:100%; color:var(--ink-soft); font-style:italic; font-size:0.96rem; }

/* lab / exercise blocks */
.exercise, .ex, .ex-body, .lab, .rubric, .grade, .ex-grade {
  background:var(--card); border:1px solid var(--hairline); border-radius:10px; padding:14px 16px; margin:1.2em 0;
}
.ex-lbl, .ex-grade, .goal, .predict, .expected, .expect {
  font:600 0.68rem/1 var(--font-mono); letter-spacing:0.08em; text-transform:uppercase; color:var(--ink-faint);
}
.yes { color:var(--tip); } .nb { color:var(--ink-soft); }

/* cross links + utilities */
.xref, .inlink, .back, .next, .xlink { color:var(--accent); text-decoration:none; }
.xref:hover, .inlink:hover, .back:hover, .next:hover, .xlink:hover { text-decoration:underline; }
.muted, .dim, .soft { color:var(--ink-faint); }
.fw, .strong { font-weight:600; color:var(--ink); }
.legend { color:var(--ink-faint); font-size:0.85rem; }
.pillbar { display:flex; flex-wrap:wrap; gap:8px; margin:1em 0; }
.atom { width:34px; height:34px; margin-bottom:14px; }

/* ── Frontend System Design notebook (v2) extras ─────────────────────── */
/* beginner "Start here" on-ramp */
.onramp {
  font-size:1.02rem; color:var(--ink); background:var(--card);
  border:1px solid var(--hairline); border-left:3px solid var(--note);
  border-radius:10px; padding:16px 18px; margin:0 0 1.4em;
}
.onramp .k { display:block; font:600 0.68rem/1 var(--font-mono); letter-spacing:0.12em; text-transform:uppercase; color:var(--note); margin-bottom:7px; }
/* sessions overview nav */
.doc nav.toc { display:block; background:var(--card); border:1px solid var(--hairline); border-radius:12px; padding:16px 20px; margin:0 0 2.4em; }
.doc nav.toc h2 { font:600 0.7rem/1 var(--font-mono); letter-spacing:0.12em; text-transform:uppercase; color:var(--ink-faint); margin:0 0 10px; font-family:var(--font-mono); }
.doc nav.toc a { display:flex; gap:11px; align-items:baseline; padding:6px 0; color:var(--ink-soft); text-decoration:none; font-size:0.94rem; }
.doc nav.toc a:hover { color:var(--accent); }
.doc nav.toc a b { color:var(--accent); font:600 0.8rem/1 var(--font-mono); }
/* vs with a middle separator */
.vs:has(.mid) { grid-template-columns:1fr auto 1fr; }
.vs .side { background:var(--card); border:1px solid var(--hairline); border-radius:10px; padding:15px 16px; }
.vs .side .k { display:block; font:600 0.66rem/1 var(--font-mono); letter-spacing:0.1em; text-transform:uppercase; color:var(--accent); margin-bottom:6px; }
.vs .mid { display:flex; align-items:center; justify-content:center; background:none; border:0; padding:0 4px; font-family:var(--font-mono); color:var(--accent); }
/* flow with step cards */
.flow .step { flex:1 1 130px; min-width:120px; position:relative; background:var(--card); border:1px solid var(--hairline); border-radius:10px; padding:12px 13px; }
.flow .step::after { content:none; }
.flow .step .n { font:500 0.7rem/1 var(--font-mono); color:var(--accent); }
.flow .step h5 { margin:3px 0 4px; font-size:0.92rem; }
.flow .step p { margin:0; font-size:0.84rem; color:var(--ink-soft); }
/* ASCII / box diagram (ink slab with caption) */
.diagram {
  background:var(--slab); border:1px solid var(--slab-line); border-radius:var(--radius);
  padding:18px 20px; margin:1.5em 0; overflow:auto; color:var(--slab-text);
}
.diagram pre { background:none; border:0; padding:0; margin:0; box-shadow:none; color:var(--slab-text); font-size:0.82rem; line-height:1.5; white-space:pre; }
.diagram pre::before { content:none; }
.diagram .cap { display:block; font:600 0.66rem/1 var(--font-mono); letter-spacing:0.1em; text-transform:uppercase; color:var(--tk-com); margin-bottom:12px; }
.diagram b { color:var(--tk-fn); }
.diagram .grn { color:var(--tk-str); }
.diagram .bl { color:var(--tk-kw); }
.bl { color:var(--tk-kw); }
.cap { color:var(--ink-faint); }
.range { font-family:var(--font-mono); color:var(--ink-soft); font-size:0.82rem; }
