/* ==========================================================================
   HIFP Design System v1.0 · 2026-09-20
   Single source of truth for typography, palette, layout, and component
   styles across the v4 artifact kit and the docs site.
   Derived from HIFP-walking-deck-v4 (2026-09-14), formalized here.
   ========================================================================== */

/* ---------- Tokens ---------- */
:root {
  /* Palette */
  --bg:            #FAF8F3;   /* warm off-white ground */
  --bg-inset:     #F4F0E6;   /* softer inset panel */
  --ink:           #1A1A1A;   /* near-black text */
  --muted:         #5A5A5A;   /* secondary text */
  --muted-soft:    #8A8A8A;   /* tertiary / captions */
  --accent:        #0F4C3A;   /* deep forest — health+wealth "growth" */
  --accent-deep:   #0A3A2C;
  --accent-tint:   #E8F0EC;
  --accent-2:      #E37B2A;   /* warm orange — call-to-attention */
  --accent-2-tint: #FDF2E6;
  --gold:          #B8944D;   /* honest / adversarial marker */
  --gold-tint:     #F5EED9;
  --rule:          #D9D3C3;   /* warm gray divider */
  --rule-soft:     #EAE5D8;
  --card:          #FFFFFF;
  --warn-border:   #B45309;   /* draft-state indicator */
  --warn-bg:       #FDF2E6;
  --danger:        #8B2E2E;
  --danger-tint:   #F5E1E1;
  --pending:       #B0B0B0;
  --pending-tint:  #EFEDE7;
  --draft:         #7A4A1C;
  --draft-tint:    #F5E9D2;
  --code-bg:       #141414;
  --code-ink:      #E8F0EC;

  /* Typography */
  --font-serif: Charter, "Charter BT", "Iowan Old Style", "Iowan", Georgia, "Times New Roman", serif;
  --font-sans:  -apple-system, "Inter", BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-mono:  ui-monospace, "SF Mono", "Menlo", "Consolas", monospace;

  /* Scale */
  --fs-body:       17px;      /* [[hifp-design-for-gx-boomers]] · 17px+ minimum */
  --fs-small:      14px;
  --fs-caption:    12.5px;
  --fs-kicker:     11.5px;
  --fs-h3:         22px;
  --fs-h2:         32px;
  --fs-h1:         46px;
  --fs-hero:       88px;
  --fs-hero-lg:    104px;
  --lh-body:       1.55;
  --lh-tight:      1.05;

  /* Layout */
  --max-doc:       880px;     /* long-form reading column */
  --max-canvas:    1120px;    /* index + investor-facing pages */
  --max-slide:     1280px;    /* deck slide width */
  --pad-page:      24px;
  --gap:           16px;
  --radius:        4px;
  --radius-lg:     8px;

  color-scheme: light;
}

/* ---------- Base ---------- */
* { box-sizing: border-box; }

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

img { max-width: 100%; }
[hidden] { display: none !important; }

::selection { background: var(--accent-tint); color: var(--accent-deep); }

a { color: var(--accent); text-decoration: none; border-bottom: 1px solid var(--rule); }
a:hover { color: var(--accent-deep); border-bottom-color: var(--accent); }
a.plain, .plain a { border-bottom: none; }

strong { color: var(--ink); }
em { font-style: italic; }

/* ---------- Typography components ---------- */
h1, h2, h3, h4 {
  font-family: var(--font-serif);
  font-weight: 400;
  letter-spacing: -0.015em;
  color: var(--ink);
  margin: 32px 0 12px;
}
h1 { font-size: var(--fs-h1); line-height: 1.1; letter-spacing: -0.02em; }
h2 { font-size: var(--fs-h2); line-height: 1.15; letter-spacing: -0.015em; margin-top: 44px; }
h3 { font-size: var(--fs-h3); line-height: 1.25; margin-top: 32px; }
h4 { font-size: 17px; font-weight: 700; margin-top: 24px; font-family: var(--font-sans); letter-spacing: 0; }

h1.hero {
  font-family: var(--font-serif);
  font-size: var(--fs-hero); line-height: 0.98;
  letter-spacing: -0.025em; margin: 0 0 28px;
}
h1.hero em, h2.big em, h1 em { color: var(--accent); font-style: italic; }
h2.big {
  font-family: var(--font-serif); font-size: 56px; line-height: 1.05;
  letter-spacing: -0.02em; margin: 0 0 24px; font-weight: 400;
}

p { margin: 12px 0; }
p.lede {
  font-family: var(--font-serif); font-style: italic;
  font-size: 22px; line-height: 1.4; color: var(--muted);
  max-width: 780px; margin: 8px 0 24px;
}
p.body, .body { font-size: var(--fs-body); max-width: 780px; }

.kicker {
  font-size: var(--fs-kicker);
  letter-spacing: 0.16em; text-transform: uppercase;
  color: var(--accent); font-weight: 700;
  margin: 0 0 10px;
}

blockquote {
  font-family: var(--font-serif); font-style: italic;
  font-size: 20px; line-height: 1.45;
  border-left: 3px solid var(--accent);
  margin: 24px 0; padding: 8px 24px;
  color: var(--ink); max-width: 780px;
}
blockquote cite {
  display: block; font-style: normal; font-family: var(--font-sans);
  font-size: 13px; color: var(--muted); margin-top: 8px;
  letter-spacing: 0.06em; text-transform: uppercase;
}

ul, ol { margin: 12px 0; padding-left: 22px; }
li { margin: 6px 0; }
li > ul, li > ol { margin: 4px 0; }

code, pre { font-family: var(--font-mono); }
code {
  background: var(--accent-tint); color: var(--accent-deep);
  padding: 1px 6px; border-radius: 3px; font-size: 13px;
}
pre {
  background: var(--code-bg); color: var(--code-ink);
  padding: 14px 16px; border-radius: var(--radius);
  overflow-x: auto; font-size: 13px; line-height: 1.5;
  margin: 16px 0;
}
pre code { background: transparent; color: inherit; padding: 0; }

hr {
  border: 0; border-top: 1px solid var(--rule);
  margin: 40px 0;
}

/* ---------- Layout wrappers ---------- */
.wrap { max-width: var(--max-canvas); margin: 0 auto; padding: 40px var(--pad-page) 80px; }
.wrap.doc { max-width: var(--max-doc); }
.wrap.slide { max-width: var(--max-slide); }

/* ---------- Document header (long-form artifacts) ---------- */
.doc-header {
  background: var(--card);
  border-bottom: 2px solid var(--ink);
  padding: 48px var(--pad-page);
}
.doc-header .wrap { padding-top: 0; padding-bottom: 0; }
.doc-header h1 { margin: 0 0 12px; }
.doc-header .subtitle {
  font-size: 16px; color: var(--muted); margin: 0; max-width: 720px;
}
.doc-header .meta {
  font-size: 13px; color: var(--muted); line-height: 1.7; margin-top: 20px;
}
.doc-header .meta strong { color: var(--ink); }

/* ---------- Cards + panels ---------- */
.card {
  background: var(--card);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  padding: 22px;
}
.card.priority   { border-left: 4px solid var(--accent); }
.card.honest     { border-left: 4px solid var(--gold); }
.card.draft      { border-left: 4px solid var(--draft); }
.card.superseded { opacity: 0.55; background: var(--pending-tint); }
.card.pending    { opacity: 0.65; background: var(--pending-tint); cursor: default; }

.panel {
  background: var(--bg-inset);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  padding: 22px 26px; margin: 24px 0;
}

.callout {
  background: var(--accent-tint);
  border-left: 4px solid var(--accent);
  padding: 18px 24px; margin: 28px 0;
  border-radius: var(--radius);
}
.callout h3, .callout h4 { margin-top: 4px; }
.callout.warn {
  background: var(--warn-bg); border-left-color: var(--warn-border);
}
.callout.honest {
  background: var(--gold-tint); border-left-color: var(--gold);
}
.callout.danger {
  background: var(--danger-tint); border-left-color: var(--danger);
}

/* ---------- Badges + pills ---------- */
.badge {
  display: inline-block;
  font-size: 10.5px; letter-spacing: 0.08em; text-transform: uppercase;
  font-weight: 700; padding: 3px 8px; border-radius: 2px;
  vertical-align: middle;
}
.badge-accent    { background: var(--accent-tint); color: var(--accent); }
.badge-canonical { background: var(--accent); color: white; }
.badge-honest    { background: var(--gold); color: white; }
.badge-draft     { background: var(--draft-tint); color: var(--draft); }
.badge-new       { background: var(--draft); color: white; }
.badge-superseded{ background: var(--pending); color: white; }
.badge-pending   { background: var(--pending-tint); color: var(--muted); border: 1px solid var(--pending); }
.badge-html      { background: var(--gold-tint); color: var(--gold); }
.badge-md        { background: #F0F0F0; color: var(--muted); }
.badge-demo      { background: var(--accent); color: white; }

.pill {
  display: inline-block;
  padding: 4px 12px; border-radius: 999px;
  background: var(--accent-tint); color: var(--accent);
  font-size: 12.5px; font-weight: 600; letter-spacing: 0.02em;
}
.pill.warn { background: var(--warn-bg); color: var(--warn-border); border: 1px solid var(--warn-border); }
.pill.muted { background: var(--pending-tint); color: var(--muted); }

.draft-pill {
  display: inline-block; padding: 6px 14px; border-radius: 999px;
  background: var(--warn-bg); border: 1px solid var(--warn-border);
  color: var(--warn-border); font-size: 12px; font-weight: 700;
  letter-spacing: 0.08em; text-transform: uppercase;
}

/* ---------- Tables ---------- */
table {
  width: 100%; border-collapse: collapse;
  margin: 20px 0; font-size: 14.5px;
  background: var(--card);
}
th, td {
  padding: 10px 14px; text-align: left; vertical-align: top;
  border-bottom: 1px solid var(--rule);
}
th {
  font-family: var(--font-sans); font-weight: 700; font-size: 12.5px;
  letter-spacing: 0.06em; text-transform: uppercase;
  color: var(--accent); background: var(--accent-tint);
  border-bottom: 1px solid var(--accent);
}
tbody tr:hover { background: var(--bg-inset); }

/* ---------- Grids ---------- */
.grid { display: grid; gap: var(--gap); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

/* ---------- Status bar (index / dashboards) ---------- */
.status-bar { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin: 0 0 32px; }
.status-item {
  background: var(--card); border: 1px solid var(--rule);
  padding: 18px; border-radius: var(--radius);
}
.status-item .label {
  font-size: 11px; text-transform: uppercase; letter-spacing: 0.12em;
  color: var(--muted); font-weight: 600; margin-bottom: 6px;
}
.status-item .value {
  font-family: var(--font-serif); font-size: 22px;
  color: var(--accent); margin-bottom: 4px;
}
.status-item .sub { font-size: 12px; color: var(--muted); }

/* ---------- Section headers (index groupings) ---------- */
.group-title {
  font-family: var(--font-serif); font-size: 26px; font-weight: 400;
  letter-spacing: -0.008em; margin: 44px 0 4px;
}
.group-sub {
  color: var(--muted); font-size: 13px; margin: 0 0 20px;
  padding-bottom: 10px; border-bottom: 1px solid var(--rule);
}

/* ---------- Table of contents (long-form document sidebar TOC) ---------- */
.toc {
  background: var(--bg-inset); border: 1px solid var(--rule);
  border-radius: var(--radius); padding: 20px 24px; margin: 24px 0 32px;
}
.toc h3 { margin-top: 0; }
.toc ol, .toc ul { margin: 0; padding-left: 20px; }
.toc a { border-bottom: none; }
.toc a:hover { text-decoration: underline; }

/* Scope reset: a .toc inside a <nav> element is a slide-nav chip container,
   not a long-form TOC. Kill the boxed styling above so decks + any future
   nav pattern render clean without needing a per-file reset. */
nav .toc, .nav .toc {
  background: transparent; border: 0; border-radius: 0;
  padding: 0; margin: 0;
}

/* ---------- Sidebar draft indicator (small pill placed above companion links) ---------- */
.sidebar-draft {
  margin: 22px 0 0;
  padding: 6px 10px;
  background: var(--warn-bg);
  border: 1px solid var(--warn-border);
  color: var(--warn-border);
  font-size: 10.5px; font-weight: 700;
  letter-spacing: 0.09em; text-transform: uppercase;
  border-radius: 4px; text-align: center;
}

/* ---------- Home pill (fixed back-to-index nav on every artifact) ---------- */
.home-pill {
  position: fixed; top: 8px; right: 12px; z-index: 100;
  display: inline-flex; align-items: center; gap: 4px;
  background: rgba(255, 255, 255, 0.94);
  -webkit-backdrop-filter: blur(6px); backdrop-filter: blur(6px);
  color: var(--accent);
  border: 1px solid var(--rule);
  border-radius: 999px;
  padding: 4px 12px;
  font-family: var(--font-sans);
  font-size: 11.5px; font-weight: 600; letter-spacing: 0.02em;
  text-decoration: none;
  transition: background 0.15s, border-color 0.15s, color 0.15s;
}
.home-pill:hover, .home-pill:focus-visible {
  background: var(--accent-tint);
  border-color: var(--accent);
  color: var(--accent-deep);
}
@media print { .home-pill { display: none !important; } }

/* ---------- Footer ---------- */
.foot, .footer {
  margin-top: 60px; padding-top: 20px;
  border-top: 1px solid var(--rule);
  color: var(--muted); font-size: 12.5px;
  text-align: center;
}

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  .status-bar, .grid-3, .grid-4 { grid-template-columns: 1fr 1fr; }
  h1 { font-size: 36px; }
  h1.hero { font-size: 56px; }
  h2.big { font-size: 40px; }
}
@media (max-width: 600px) {
  :root { --fs-body: 16px; --pad-page: 18px; }
  .status-bar, .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .doc-header { padding: 32px var(--pad-page); }
  h1 { font-size: 28px; }
  h1.hero { font-size: 44px; }
  h2.big { font-size: 30px; }
  p.lede { font-size: 18px; }
}

/* ---------- Print ---------- */
@media print {
  html, body { background: white; color: black; font-size: 11pt; }
  .wrap { max-width: none; padding: 0; }
  a { color: black; border-bottom: none; }
  a[href]:after { content: " (" attr(href) ")"; font-size: 9pt; color: #555; }
  .doc-header { border-bottom: 1pt solid black; padding: 0 0 12pt; margin-bottom: 18pt; }
  h1, h2, h3 { page-break-after: avoid; }
  .card, .callout, .panel, table { page-break-inside: avoid; }
  .foot, .footer { border-top: 1pt solid #999; }
  pre { background: #f5f5f5; color: black; border: 1pt solid #ccc; }
}