/* ============================================================================
   Paxeer · Legal & Compliance — Standalone Stylesheet
   Derived from Paxeer Brand Identity System v3.0 (design tokens).
   No build step required: plain CSS + Google Fonts. Drop into any static host.
   ============================================================================ */

/* ——— Fonts ——————————————————————————————————————————————————————————————
   Inter + JetBrains Mono load from Google Fonts. Paxeer Grand Sans is the
   brand display face; its OTF/WOFF2 files live at /fonts on the Paxeer site,
   so the @font-face below picks them up when deployed there and falls back to
   Inter everywhere else. */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@200;300;400;500;600;700&family=JetBrains+Mono:wght@400;500;600&display=swap');

@font-face {
  font-family: 'Paxeer Grand Sans';
  src: url('/fonts/PPPangramSansRounded-Light.otf') format('opentype');
  font-weight: 200 300; font-style: normal; font-display: swap;
}
@font-face {
  font-family: 'Paxeer Grand Sans';
  src: url('/fonts/PPPangramSansRounded-Medium.otf') format('opentype');
  font-weight: 400 500; font-style: normal; font-display: swap;
}
@font-face {
  font-family: 'Paxeer Grand Sans';
  src: url('/fonts/PPPangramSansRounded-Semibold.otf') format('opentype');
  font-weight: 600; font-style: normal; font-display: swap;
}

:root {
  /* Brand accent — Sophisticated Ink Blue */
  --color-primary-brand: #2841B8;   /* Paxeer Ink */
  --color-black:         #04050A;

  /* Neutral scale — cool / slate-tinted */
  --color-neutral-800: #0A0C10;  /* Obsidian — page canvas */
  --color-neutral-700: #1A1E27;  /* Graphite */
  --color-neutral-600: #3A4151;  /* Storm */
  --color-neutral-500: #6F7686;  /* Slate */
  --color-neutral-400: #9DA3B2;  /* Mist */
  --color-neutral-300: #CFD3DB;  /* Smoke */
  --color-neutral-200: #EFF1F5;  /* Porcelain */
  --color-neutral-100: #FFFFFF;  /* Paper */

  /* System — Ink Blue */
  --color-blue-400: #2841B8;
  --color-blue-300: #1F3294;
  --color-blue-200: #8E9AE0;
  --color-blue-100: #E5E8F8;

  /* System — Green / Red / Amber */
  --color-green-300:  #2F9F75;
  --color-red-300:    #D14D5E;
  --color-orange-300: #CB7C25;

  /* Semantic roles (dark-first) */
  --bg:           var(--color-neutral-800);
  --bg-elevated:  #11141B;
  --bg-subtle:    #14171F;
  --bg-overlay:   rgba(10, 12, 16, 0.72);
  --border-hairline: rgba(255, 255, 255, 0.07);
  --border-strong:   rgba(255, 255, 255, 0.12);

  --fg:        #ECEEF4;
  --fg-muted:  var(--color-neutral-400);
  --fg-subtle: var(--color-neutral-500);
  --fg-inverse: var(--color-black);

  --accent-ink:   var(--color-primary-brand);
  --accent-hover: var(--color-blue-300);
  --accent-fore:  var(--color-blue-200);
  --accent-tint:  rgba(40, 65, 184, 0.14);

  --success: var(--color-green-300);
  --warning: var(--color-orange-300);
  --danger:  var(--color-red-300);

  /* Typography */
  --font-display: 'Paxeer Grand Sans', 'Inter', system-ui, sans-serif;
  --font-body:    'Inter', system-ui, -apple-system, sans-serif;
  --font-mono:    'JetBrains Mono', ui-monospace, 'SF Mono', monospace;

  --fw-thin: 200; --fw-light: 300; --fw-regular: 400; --fw-medium: 500; --fw-semi: 600;

  --track-display: -0.028em;
  --track-h1: -0.024em;
  --track-h2: -0.02em;
  --track-h3: -0.014em;
  --track-body: -0.008em;
  --track-meta: 0.14em;

  /* Spacing scale (4px base) */
  --space-1: 4px;  --space-2: 8px;  --space-3: 12px; --space-4: 16px;
  --space-5: 24px; --space-6: 32px; --space-7: 48px; --space-8: 64px;
  --space-9: 96px; --space-10: 128px;

  /* Radii */
  --radius-sm: 6px; --radius-md: 10px; --radius-lg: 14px;
  --radius-xl: 22px; --radius-2xl: 32px; --radius-pill: 999px;

  /* Shadows — cinematic depth */
  --shadow-02: 0 2px 6px rgba(0,0,0,0.22), inset 0 1px 0 rgba(255,255,255,0.05);
  --shadow-03: 0 6px 16px rgba(0,0,0,0.28), 0 1px 2px rgba(0,0,0,0.14), inset 0 1px 0 rgba(255,255,255,0.05);
  --shadow-04: 0 14px 32px rgba(0,0,0,0.36), 0 4px 10px rgba(0,0,0,0.18), inset 0 1px 0 rgba(255,255,255,0.06);
  --shadow-05: 0 28px 64px rgba(0,0,0,0.46), 0 10px 20px rgba(0,0,0,0.22), inset 0 1px 0 rgba(255,255,255,0.06);
  --shadow-glow-accent: 0 0 0 1px rgba(40,65,184,0.45), 0 0 48px rgba(40,65,184,0.30);
  --shadow-focus: 0 0 0 3px rgba(40, 65, 184, 0.42);

  /* Motion */
  --ease-standard: cubic-bezier(0.32, 0.72, 0, 1);
  --ease-emphasis: cubic-bezier(0.22, 1, 0.36, 1);
  --duration-snappy: 200ms;
  --duration-standard: 320ms;

  --backdrop-blur: blur(20px) saturate(140%);

  /* Reading measure for legal body copy */
  --measure: 70ch;
}

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

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
html { scroll-padding-top: 96px; } /* clears the sticky header on anchor jumps */

body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.68;
  letter-spacing: var(--track-body);
  font-weight: var(--fw-regular);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  min-height: 100vh;
  /* ambient ink glow, top-left — the only atmospheric flourish */
  background-image:
    radial-gradient(60rem 40rem at 12% -8%, rgba(40,65,184,0.10), transparent 60%),
    radial-gradient(50rem 36rem at 100% 0%, rgba(40,65,184,0.05), transparent 55%);
  background-attachment: fixed;
}

a { color: var(--accent-fore); text-decoration: none; }
a:hover { color: var(--color-neutral-100); }

::selection { background: var(--accent-tint); color: var(--color-neutral-100); }

:focus-visible {
  outline: none;
  box-shadow: var(--shadow-focus);
  border-radius: var(--radius-sm);
}

/* ——— Site header ————————————————————————————————————————————————————— */
.site-header {
  position: sticky; top: 0; z-index: 50;
  display: flex; align-items: center; justify-content: space-between;
  gap: var(--space-4);
  padding: var(--space-3) clamp(var(--space-4), 5vw, var(--space-8));
  background: rgba(10, 12, 16, 0.72);
  backdrop-filter: var(--backdrop-blur);
  -webkit-backdrop-filter: var(--backdrop-blur);
  border-bottom: 1px solid var(--border-hairline);
}
.brand { display: inline-flex; align-items: center; gap: var(--space-3); }
.brand .mark { width: 18px; height: 18px; display: block; flex: none; }
.brand .wordmark {
  font-family: var(--font-display);
  font-weight: var(--fw-medium);
  font-size: 17px;
  letter-spacing: var(--track-h3);
  color: var(--fg);
}
.brand .wordmark .ink { color: var(--accent-fore); }
.header-meta {
  font-family: var(--font-mono);
  font-size: 11px; letter-spacing: var(--track-meta);
  text-transform: uppercase; color: var(--fg-subtle);
}
.header-back {
  font-family: var(--font-mono);
  font-size: 12px; letter-spacing: 0.04em;
  color: var(--fg-muted);
  display: inline-flex; align-items: center; gap: var(--space-2);
  transition: color var(--duration-snappy) var(--ease-standard);
}
.header-back:hover { color: var(--fg); }
.header-back .arrow { transition: transform var(--duration-snappy) var(--ease-standard); }
.header-back:hover .arrow { transform: translateX(-3px); }

/* ——— Shared layout shell ————————————————————————————————————————————— */
.shell {
  max-width: 1240px;
  margin: 0 auto;
  padding: clamp(var(--space-6), 6vw, var(--space-9)) clamp(var(--space-4), 5vw, var(--space-8)) var(--space-10);
}

/* ============================================================================
   INDEX / HUB
   ============================================================================ */
.hub-eyebrow {
  font-family: var(--font-mono);
  font-size: 11px; letter-spacing: var(--track-meta);
  text-transform: uppercase; color: var(--accent-fore);
  display: inline-flex; align-items: center; gap: var(--space-2);
  margin-bottom: var(--space-5);
}
.hub-eyebrow::before {
  content: ""; width: 6px; height: 6px;
  background: var(--accent-ink);
  transform: rotate(45deg); display: inline-block;
}
.hub-title {
  font-family: var(--font-display);
  font-weight: var(--fw-light);
  font-size: clamp(40px, 7vw, 72px);
  line-height: 1.04;
  letter-spacing: var(--track-display);
  max-width: 16ch;
}
.hub-lede {
  margin-top: var(--space-5);
  max-width: 56ch;
  font-size: 19px; line-height: 1.6;
  color: var(--fg-muted);
  font-weight: var(--fw-light);
}
.hub-meta {
  margin-top: var(--space-6);
  display: flex; flex-wrap: wrap; gap: var(--space-3) var(--space-6);
  font-family: var(--font-mono);
  font-size: 12px; letter-spacing: 0.02em;
  color: var(--fg-subtle);
}
.hub-meta span { display: inline-flex; align-items: center; gap: var(--space-2); }
.hub-meta b { color: var(--fg); font-weight: var(--fw-medium); }

.hub-divider {
  margin: var(--space-8) 0 var(--space-7);
  height: 1px; border: 0;
  background: linear-gradient(90deg, var(--border-strong), transparent);
}

.doc-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: var(--space-4);
}
.doc-card {
  position: relative;
  display: flex; flex-direction: column;
  gap: var(--space-3);
  padding: var(--space-5);
  background: var(--bg-elevated);
  border: 1px solid var(--border-hairline);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-02);
  transition: transform var(--duration-standard) var(--ease-emphasis),
              border-color var(--duration-standard) var(--ease-standard),
              box-shadow var(--duration-standard) var(--ease-standard);
  overflow: hidden;
}
.doc-card::before {
  content: ""; position: absolute; inset: 0 auto 0 0; width: 2px;
  background: var(--accent-ink); opacity: 0; transform: scaleY(0.4);
  transform-origin: center;
  transition: opacity var(--duration-standard) var(--ease-standard),
              transform var(--duration-standard) var(--ease-emphasis);
}
.doc-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-strong);
  box-shadow: var(--shadow-04);
}
.doc-card:hover::before { opacity: 1; transform: scaleY(1); }
.doc-card .kicker {
  font-family: var(--font-mono);
  font-size: 11px; letter-spacing: var(--track-meta);
  text-transform: uppercase; color: var(--fg-subtle);
}
.doc-card h3 {
  font-family: var(--font-body);
  font-weight: var(--fw-medium);
  font-size: 20px; line-height: 1.25;
  letter-spacing: var(--track-h3);
  color: var(--fg);
}
.doc-card p {
  font-size: 14px; line-height: 1.6;
  color: var(--fg-muted); font-weight: var(--fw-light);
  flex: 1;
}
.doc-card .go {
  margin-top: var(--space-2);
  font-family: var(--font-mono);
  font-size: 12px; letter-spacing: 0.04em;
  color: var(--accent-fore);
  display: inline-flex; align-items: center; gap: var(--space-2);
}
.doc-card .go .arrow { transition: transform var(--duration-snappy) var(--ease-standard); }
.doc-card:hover .go .arrow { transform: translateX(3px); }
.doc-card a.stretch { position: absolute; inset: 0; }

/* ============================================================================
   DOCUMENT PAGE
   ============================================================================ */
.doc-layout {
  display: grid;
  grid-template-columns: 248px minmax(0, 1fr);
  gap: clamp(var(--space-6), 5vw, var(--space-9));
  align-items: start;
}

/* — Table of contents rail — */
.toc {
  position: sticky; top: 88px;
  max-height: calc(100vh - 112px);
  overflow-y: auto;
  padding-right: var(--space-3);
  scrollbar-width: thin;
  scrollbar-color: var(--border-strong) transparent;
}
.toc::-webkit-scrollbar { width: 6px; }
.toc::-webkit-scrollbar-thumb { background: var(--border-strong); border-radius: var(--radius-pill); }
.toc-label {
  font-family: var(--font-mono);
  font-size: 11px; letter-spacing: var(--track-meta);
  text-transform: uppercase; color: var(--fg-subtle);
  padding-bottom: var(--space-3);
  margin-bottom: var(--space-3);
  border-bottom: 1px solid var(--border-hairline);
}
/* Collapsible ToC — clean disclosure on every viewport */
details.toc-collapse > summary {
  cursor: pointer; list-style: none;
  font-family: var(--font-mono);
  font-size: 11px; letter-spacing: var(--track-meta);
  text-transform: uppercase; color: var(--fg-subtle);
  display: flex; align-items: center; justify-content: space-between;
  padding-bottom: var(--space-3);
  margin-bottom: var(--space-3);
  border-bottom: 1px solid var(--border-hairline);
}
details.toc-collapse > summary::-webkit-details-marker { display: none; }
details.toc-collapse > summary::marker { content: ""; }
details.toc-collapse > summary .chev {
  font-size: 14px; transition: transform var(--duration-snappy) var(--ease-standard);
}
details.toc-collapse[open] > summary .chev { transform: rotate(90deg); }
/* On the desktop rail the chevron is noise — the list is always visible. */
@media (min-width: 901px) {
  details.toc-collapse > summary .chev { display: none; }
  details.toc-collapse > summary { cursor: default; }
}
.toc ol { list-style: none; padding: 0; display: flex; flex-direction: column; gap: 2px; counter-reset: none; }
.toc a {
  display: flex; gap: var(--space-3);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-sm);
  font-size: 13.5px; line-height: 1.4;
  color: var(--fg-muted);
  border-left: 2px solid transparent;
  transition: color var(--duration-snappy) var(--ease-standard),
              background var(--duration-snappy) var(--ease-standard);
}
.toc a .n {
  font-family: var(--font-mono);
  font-size: 12px; color: var(--fg-subtle);
  flex: none; min-width: 1.5em;
}
.toc a:hover { color: var(--fg); background: var(--bg-subtle); }
.toc a.active {
  color: var(--accent-fore);
  background: var(--accent-tint);
  border-left-color: var(--accent-ink);
}
.toc a.active .n { color: var(--accent-fore); }

/* — Article column — */
.doc-article { min-width: 0; max-width: var(--measure); }

.doc-masthead { margin-bottom: var(--space-7); }
.doc-eyebrow {
  font-family: var(--font-mono);
  font-size: 11px; letter-spacing: var(--track-meta);
  text-transform: uppercase; color: var(--accent-fore);
  display: inline-flex; align-items: center; gap: var(--space-2);
  margin-bottom: var(--space-4);
}
.doc-eyebrow::before {
  content: ""; width: 6px; height: 6px;
  background: var(--accent-ink); transform: rotate(45deg);
  display: inline-block;
}
.doc-title {
  font-family: var(--font-display);
  font-weight: var(--fw-light);
  font-size: clamp(34px, 5.5vw, 56px);
  line-height: 1.06;
  letter-spacing: var(--track-display);
}

/* metadata card */
.doc-meta {
  margin-top: var(--space-6);
  border: 1px solid var(--border-hairline);
  border-radius: var(--radius-lg);
  background: var(--bg-elevated);
  box-shadow: var(--shadow-02);
  overflow: hidden;
}
.doc-meta .row {
  display: grid;
  grid-template-columns: minmax(120px, 200px) 1fr;
  gap: var(--space-4);
  padding: var(--space-3) var(--space-5);
  border-bottom: 1px solid var(--border-hairline);
}
.doc-meta .row:last-child { border-bottom: 0; }
.doc-meta .row dt {
  font-family: var(--font-mono);
  font-size: 11px; letter-spacing: var(--track-meta);
  text-transform: uppercase; color: var(--fg-subtle);
  padding-top: 2px;
}
.doc-meta .row dd { font-size: 14.5px; line-height: 1.55; color: var(--fg); font-weight: var(--fw-light); }
.doc-meta .row dd strong { font-weight: var(--fw-medium); }

/* — Body typography — */
.doc-body { font-size: 16.5px; }
.doc-body > * + * { margin-top: var(--space-4); }

.doc-body h2 {
  scroll-margin-top: 96px;
  margin-top: var(--space-8);
  padding-top: var(--space-5);
  border-top: 1px solid var(--border-hairline);
  font-family: var(--font-body);
  font-weight: var(--fw-regular);
  font-size: clamp(24px, 3.2vw, 30px);
  line-height: 1.22;
  letter-spacing: var(--track-h2);
  color: var(--fg);
  display: flex; gap: var(--space-4); align-items: baseline;
}
.doc-body h2 .sec-n {
  font-family: var(--font-mono);
  font-size: 0.62em;
  font-weight: var(--fw-medium);
  color: var(--accent-fore);
  letter-spacing: 0;
  flex: none;
  padding-top: 0.35em;
}
.doc-body h2:first-of-type { /* keep first section's top rule but tighten */ }

.doc-body h3 {
  margin-top: var(--space-6);
  font-family: var(--font-body);
  font-weight: var(--fw-semi);
  font-size: 17px; line-height: 1.4;
  letter-spacing: var(--track-h3);
  color: var(--fg);
}

.doc-body p { color: var(--color-neutral-300); font-weight: var(--fw-light); }
.doc-body p strong, .doc-body li strong {
  color: var(--fg); font-weight: var(--fw-medium);
}
.doc-body em { font-style: italic; color: var(--fg); }

/* defined-term emphasis: a bold span that is a quoted definition */
.doc-body .term { color: var(--accent-fore); font-weight: var(--fw-medium); }

/* enumerated (i)/(ii) lists rendered from inline roman/alpha markers */
.doc-body ul.enum {
  list-style: none; padding: 0;
  display: flex; flex-direction: column; gap: var(--space-3);
  margin-top: var(--space-4);
}
.doc-body ul.enum > li {
  display: grid;
  grid-template-columns: minmax(2.2em, auto) 1fr;
  gap: var(--space-3);
  color: var(--color-neutral-300);
  font-weight: var(--fw-light);
}
.doc-body ul.enum > li .marker {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--accent-fore);
  padding-top: 1px;
  white-space: nowrap;
}

/* horizontal rule between major blocks */
.doc-body hr.rule {
  margin: var(--space-7) 0;
  height: 1px; border: 0;
  background: linear-gradient(90deg, var(--border-strong), transparent);
}

/* tables */
.doc-body .table-wrap {
  margin-top: var(--space-5);
  border: 1px solid var(--border-hairline);
  border-radius: var(--radius-lg);
  background: var(--bg-elevated);
  box-shadow: var(--shadow-02);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}
.doc-body table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14.5px;
  min-width: 480px;
}
.doc-body thead th {
  text-align: left;
  font-family: var(--font-mono);
  font-size: 11px; letter-spacing: var(--track-meta);
  text-transform: uppercase; color: var(--fg-subtle);
  font-weight: var(--fw-medium);
  padding: var(--space-3) var(--space-4);
  background: var(--bg-subtle);
  border-bottom: 1px solid var(--border-strong);
  white-space: nowrap;
}
.doc-body tbody td {
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--border-hairline);
  color: var(--color-neutral-300);
  font-weight: var(--fw-light);
  line-height: 1.5;
  vertical-align: top;
}
.doc-body tbody tr:last-child td { border-bottom: 0; }
.doc-body tbody tr:hover td { background: rgba(255,255,255,0.018); }
.doc-body td strong, .doc-body th strong { color: var(--fg); font-weight: var(--fw-medium); }

/* bullet lists */
.doc-body ul.bullets {
  list-style: none; padding: 0;
  display: flex; flex-direction: column; gap: var(--space-3);
  margin-top: var(--space-4);
}
.doc-body ul.bullets > li {
  position: relative;
  padding-left: var(--space-5);
  color: var(--color-neutral-300);
  font-weight: var(--fw-light);
  line-height: 1.6;
}
.doc-body ul.bullets:not(.tasks) > li::before {
  content: "";
  position: absolute; left: 4px; top: 0.62em;
  width: 5px; height: 5px;
  background: var(--accent-ink);
  transform: rotate(45deg);
}
/* task checklist */
.doc-body ul.tasks > li.task {
  display: grid;
  grid-template-columns: 1.4em 1fr;
  gap: var(--space-3);
  padding-left: 0;
  align-items: start;
}
.doc-body ul.tasks > li.task::before { content: none; }
.doc-body .check {
  width: 18px; height: 18px;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  background: var(--bg-subtle);
  display: inline-flex; align-items: center; justify-content: center;
  font-size: 11px; color: var(--color-neutral-100);
  margin-top: 0.15em;
}
.doc-body .check.on {
  background: var(--accent-ink);
  border-color: var(--accent-ink);
}

/* document footer */
.doc-footer {
  margin-top: var(--space-9);
  padding-top: var(--space-5);
  border-top: 1px solid var(--border-hairline);
  display: flex; flex-wrap: wrap; gap: var(--space-4);
  align-items: center; justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 12px; letter-spacing: 0.02em;
  color: var(--fg-subtle);
}
.doc-footer a { color: var(--fg-muted); }
.doc-footer a:hover { color: var(--fg); }

/* back-to-top pill */
.to-top {
  position: fixed; right: clamp(16px, 4vw, 40px); bottom: clamp(16px, 4vw, 40px);
  z-index: 40;
  display: inline-flex; align-items: center; gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  background: rgba(17, 20, 27, 0.8);
  backdrop-filter: var(--backdrop-blur);
  -webkit-backdrop-filter: var(--backdrop-blur);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-pill);
  font-family: var(--font-mono);
  font-size: 11px; letter-spacing: var(--track-meta);
  text-transform: uppercase; color: var(--fg-muted);
  opacity: 0; pointer-events: none; transform: translateY(8px);
  transition: opacity var(--duration-standard) var(--ease-standard),
              transform var(--duration-standard) var(--ease-emphasis),
              color var(--duration-snappy) var(--ease-standard);
}
.to-top.show { opacity: 1; pointer-events: auto; transform: translateY(0); }
.to-top:hover { color: var(--fg); border-color: var(--accent-ink); }

/* ——— Mobile-first ToC handling ——————————————————————————————————————— */
@media (max-width: 900px) {
  .doc-layout { grid-template-columns: 1fr; gap: var(--space-6); }
  .toc {
    position: static; max-height: none; overflow: visible;
    padding: var(--space-4);
    background: var(--bg-elevated);
    border: 1px solid var(--border-hairline);
    border-radius: var(--radius-lg);
  }
  details.toc-collapse[open] > summary { margin-bottom: var(--space-3); }
}

@media (max-width: 560px) {
  body { font-size: 16px; }
  .doc-body h2 { flex-direction: column; gap: var(--space-1); }
  .doc-body h2 .sec-n { padding-top: 0; }
  .doc-meta .row { grid-template-columns: 1fr; gap: var(--space-1); padding: var(--space-3) var(--space-4); }
  .header-meta { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; scroll-behavior: auto !important; }
}