/*
 * LID marketing site — Drafting Room
 *
 * Aesthetic: architectural drafting table. Ink on paper. Measured type,
 * dimension-line rhythm, plate numbering, corner registration marks.
 * Quiet confidence — a friend showing you their drawings, not a billboard.
 *
 * Hard constraints (from MKT-SITE specs):
 *   - System-aware theme via prefers-color-scheme; dark default (024, 025, 026).
 *   - WCAG AA contrast in both themes (026).
 *   - System fonts only; no remote loads (030).
 *   - No heavy JavaScript; mobile nav uses native <details>.
 *   - Fast first paint.
 */

/* ═══════════════════════════════════════════════════════════════════════
 * 1. DESIGN TOKENS
 * ═══════════════════════════════════════════════════════════════════════ */

:root {
  /* Dark (default) — ink drawing on deep slate */
  --ink: #ecead8;              /* paper-warm primary text */
  --ink-2: #b8b4a2;            /* secondary prose */
  --ink-3: #7d7a6c;            /* annotation, captions */
  --ink-4: #4a4a44;            /* rule lines */
  --paper: #0c1117;            /* page base */
  --paper-2: #121821;          /* elevated surfaces */
  --paper-3: #182029;          /* deepest recess */
  --graphite: #1e2730;         /* card borders, visible rules */

  --nib: #e0a060;              /* ochre pen-ink — primary accent */
  --nib-2: #f2b77a;            /* hover/active */
  --azure: #6da3c5;            /* blueprint steel — secondary accent */
  --azure-2: #8fbbda;

  --grid-line: rgba(224, 160, 96, 0.035);
  --grid-line-strong: rgba(224, 160, 96, 0.08);
  --marker-fill: rgba(224, 160, 96, 0.10);

  /* Type — Fraunces (variable serif) + JetBrains Mono, served from Bunny Fonts.
   * System stacks remain as fallbacks so first paint is immediate. */
  --type-serif: "Fraunces", "Iowan Old Style", "Palatino Linotype", "Book Antiqua", Palatino, "Hoefler Text", Georgia, ui-serif, serif;
  --type-sans: ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", "Helvetica Neue", Helvetica, Arial, sans-serif;
  --type-mono: "JetBrains Mono", ui-monospace, "SF Mono", Menlo, Consolas, "DejaVu Sans Mono", monospace;

  /* Space scale */
  --s-1: 0.25rem;
  --s-2: 0.5rem;
  --s-3: 0.75rem;
  --s-4: 1rem;
  --s-5: 1.5rem;
  --s-6: 2rem;
  --s-7: 3rem;
  --s-8: 4rem;
  --s-9: 6rem;
  --s-10: 8rem;

  /* Layout */
  --page-max: 84rem;
  --content-max: 38rem;        /* optical reading measure */
  --wide-max: 62rem;
  --rail-max: 16rem;

  /* Border radius — kept tight, drafting table doesn't do rounded corners */
  --r-1: 2px;
  --r-2: 4px;

  /* Motion */
  --ease: cubic-bezier(0.2, 0.6, 0.2, 1);
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --dur-1: 140ms;
  --dur-2: 260ms;
  --dur-3: 480ms;
}

@media (prefers-color-scheme: light) {
  :root {
    --ink: #14181e;
    --ink-2: #44484f;
    --ink-3: #6e7079;
    --ink-4: #c8c3b0;
    --paper: #f2ecd8;            /* archival cream */
    --paper-2: #f8f3e1;
    --paper-3: #ebe4cb;
    --graphite: #d8d0b4;

    --nib: #8c3b1a;              /* burnt sienna pen */
    --nib-2: #6d2a0e;
    --azure: #1f4971;
    --azure-2: #143655;

    --grid-line: rgba(31, 73, 113, 0.045);
    --grid-line-strong: rgba(31, 73, 113, 0.11);
    --marker-fill: rgba(31, 73, 113, 0.08);
  }
}

/* ═══════════════════════════════════════════════════════════════════════
 * 2. BASE RESET & TYPE
 * ═══════════════════════════════════════════════════════════════════════ */

*, *::before, *::after { box-sizing: border-box; }

html {
  font-size: 16px;
  text-size-adjust: 100%;
  scroll-behavior: smooth;
}

@media (min-width: 900px) {
  html { font-size: 17px; }
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--type-serif);
  font-weight: 400;
  line-height: 1.65;
  font-feature-settings: "kern" 1, "liga" 1, "onum" 1;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  min-height: 100vh;

  /* Page-level atmosphere — a faint warm glow at the top, no grid here.
   * The grid is a hero-only flourish so it doesn't compete with itself. */
  background-image:
    radial-gradient(ellipse 120% 40% at 50% 0%, rgba(224, 160, 96, 0.020), transparent 60%);
  background-attachment: fixed;
}

@media (prefers-color-scheme: light) {
  body {
    background-image:
      radial-gradient(ellipse 120% 40% at 50% 0%, rgba(31, 73, 113, 0.025), transparent 60%);
  }
}

img, svg { display: block; max-width: 100%; }

::selection { background: var(--nib); color: var(--paper); }

:focus-visible {
  outline: 2px solid var(--nib);
  outline-offset: 3px;
  border-radius: var(--r-1);
}

/* Headings — journal serif, tight tracking, deliberate sizes */
h1, h2, h3, h4, h5 {
  font-family: var(--type-serif);
  font-weight: 500;
  line-height: 1.12;
  letter-spacing: -0.012em;
  color: var(--ink);
  margin: 0 0 var(--s-4) 0;
  font-feature-settings: "kern" 1, "liga" 1, "lnum" 1;
}

h1 { font-size: clamp(2.2rem, 3.2vw + 1.2rem, 3.8rem); letter-spacing: -0.02em; }
h2 { font-size: clamp(1.5rem, 1.4vw + 1rem, 2.15rem); }
h3 { font-size: 1.22rem; font-weight: 500; letter-spacing: -0.005em; }
h4 { font-size: 1rem; font-weight: 600; }

p { margin: 0 0 1em 0; }
p:last-child { margin-bottom: 0; }

a {
  color: var(--nib);
  text-decoration: none;
  border-bottom: 1px solid color-mix(in srgb, var(--nib) 38%, transparent);
  transition: color var(--dur-1) var(--ease), border-color var(--dur-1) var(--ease);
}
a:hover { color: var(--nib-2); border-bottom-color: var(--nib-2); }

strong, b { font-weight: 600; color: var(--ink); }
em, i { font-style: italic; }

code, pre, kbd {
  font-family: var(--type-mono);
  font-size: 0.88em;
  font-feature-settings: "kern" 1, "liga" 0, "calt" 0;
}

code {
  background: var(--paper-3);
  color: var(--ink);
  padding: 0.08em 0.4em;
  border-radius: var(--r-1);
  border: 1px solid var(--graphite);
  white-space: pre-wrap;
  word-break: break-word;
}

pre {
  background: var(--paper-3);
  border: 1px solid var(--graphite);
  padding: var(--s-4) var(--s-5);
  border-radius: var(--r-2);
  overflow-x: auto;
  line-height: 1.5;
  margin: var(--s-5) 0;
}
pre code { background: transparent; border: 0; padding: 0; }

hr {
  height: 0;
  border: 0;
  border-top: 1px solid var(--ink-4);
  margin: var(--s-7) 0;
  opacity: 0.5;
}

/* ═══════════════════════════════════════════════════════════════════════
 * 3. DRAFTING-TABLE ATOMS (annotations, plate marks, corner brackets)
 * ═══════════════════════════════════════════════════════════════════════ */

/* Uppercase tracked labels — the voice of technical annotation */
.label, .eyebrow, .plate-tag {
  font-family: var(--type-mono);
  font-size: 0.68rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-3);
  font-weight: 500;
}

/* Plate mark — small section identifier, like "§ 02 / QUICKSTART" */
.plate {
  font-family: var(--type-mono);
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--ink-3);
  display: inline-flex;
  align-items: center;
  gap: var(--s-2);
}
.plate::before {
  content: "§";
  color: var(--nib);
  font-family: var(--type-serif);
  font-size: 1em;
  font-style: italic;
  letter-spacing: 0;
}

/* Dimension rule — the "|——— label ———|" annotation style */
.dim-rule {
  display: flex;
  align-items: center;
  gap: var(--s-3);
  font-family: var(--type-mono);
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-3);
  margin: var(--s-5) 0;
}
.dim-rule::before,
.dim-rule::after {
  content: "";
  flex: 1;
  height: 1px;
  background: currentColor;
  opacity: 0.35;
}
.dim-rule .dim-tip {
  position: relative;
}

/* Corner registration brackets — applied to .bracketed surfaces */
.bracketed {
  position: relative;
}
.bracketed::before,
.bracketed::after {
  content: "";
  position: absolute;
  width: 14px;
  height: 14px;
  pointer-events: none;
  opacity: 0.7;
  transition: opacity var(--dur-2) var(--ease);
}
.bracketed::before {
  top: -1px; left: -1px;
  border-top: 1px solid var(--nib);
  border-left: 1px solid var(--nib);
}
.bracketed::after {
  bottom: -1px; right: -1px;
  border-bottom: 1px solid var(--nib);
  border-right: 1px solid var(--nib);
}
.bracketed:hover::before,
.bracketed:hover::after { opacity: 1; }

/* Ornament: horizontal tick marks (like a ruler edge) */
.tick-rule {
  display: block;
  height: 10px;
  background-image: repeating-linear-gradient(
    90deg,
    var(--ink-4) 0 1px,
    transparent 1px 8px
  );
  opacity: 0.5;
  margin: var(--s-5) 0;
}

/* ═══════════════════════════════════════════════════════════════════════
 * 4. LAYOUT PRIMITIVES
 * ═══════════════════════════════════════════════════════════════════════ */

.container {
  width: min(100% - 2 * var(--s-5), var(--page-max));
  margin-inline: auto;
}

@media (min-width: 900px) {
  .container {
    width: min(100% - 2 * var(--s-7), var(--page-max));
  }
}

/* The core desktop grid: content left (wide), annotation rail right.
 * Ratio tuned so prose stays at optical measure and the rail has room
 * for plate marks, section numbers, cross-refs, and decorative schematics. */
.draft-grid {
  display: grid;
  gap: var(--s-6);
  grid-template-columns: 1fr;
}

@media (min-width: 900px) {
  .draft-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, var(--rail-max));
    gap: var(--s-8);
  }
}

/* Full-bleed inside a section: hero, demo etc. */
.split {
  display: grid;
  gap: var(--s-7);
  grid-template-columns: 1fr;
  align-items: start;
}

@media (min-width: 960px) {
  .split {
    grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr);
    gap: var(--s-9);
  }
}

/* Skip link — visible on focus */
.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--nib);
  color: var(--paper);
  padding: var(--s-2) var(--s-4);
  font-family: var(--type-mono);
  font-size: 0.85rem;
  z-index: 100;
}
.skip-link:focus { left: var(--s-4); top: var(--s-4); }

/* ═══════════════════════════════════════════════════════════════════════
 * 5. NAVIGATION
 * ═══════════════════════════════════════════════════════════════════════ */

.site-nav {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: saturate(1.2) blur(12px);
  -webkit-backdrop-filter: saturate(1.2) blur(12px);
  background: color-mix(in oklab, var(--paper) 82%, transparent);
  border-bottom: 1px solid var(--graphite);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--s-5);
  padding-block: var(--s-4);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--s-3);
  font-family: var(--type-mono);
  font-size: 0.75rem;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--ink);
  border-bottom: 0;
  padding: var(--s-2) 0;
}
.brand:hover { color: var(--nib); }

.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border: 1px solid var(--nib);
  color: var(--nib);
  font-family: var(--type-serif);
  font-size: 1rem;
  font-style: italic;
  letter-spacing: 0;
  position: relative;
}
.brand-mark::before,
.brand-mark::after {
  content: "";
  position: absolute;
  width: 3px;
  height: 3px;
  background: var(--nib);
}
.brand-mark::before { top: -2px; left: -2px; }
.brand-mark::after { bottom: -2px; right: -2px; }
.brand-text {
  font-weight: 600;
  color: inherit;
}
.brand-ver {
  color: var(--ink-3);
  font-weight: 400;
  margin-left: var(--s-2);
  font-size: 0.7rem;
}

/* Nav list — desktop */
.nav-list {
  display: flex;
  align-items: center;
  gap: var(--s-5);
  padding: 0;
  margin: 0;
  list-style: none;
  font-family: var(--type-mono);
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}
.nav-list a {
  color: var(--ink-2);
  border-bottom: 0;
  padding: var(--s-2) 0;
  position: relative;
  transition: color var(--dur-1) var(--ease);
}
.nav-list a:hover { color: var(--ink); }
.nav-list a[aria-current="page"] { color: var(--nib); }
.nav-list a[aria-current="page"]::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -1px;
  height: 1px;
  background: var(--nib);
}
.nav-list .nav-repo {
  color: var(--ink-3);
  padding-left: var(--s-5);
  margin-left: var(--s-3);
  border-left: 1px solid var(--graphite);
}

/* Mobile disclosure — checkbox hack, no JS.
 *
 * The hidden <input type="checkbox"> drives disclosure via :checked.
 * On desktop the hamburger button is hidden and the nav is visible inline.
 * On mobile the hamburger is shown and the nav only renders when the
 * checkbox is checked. No native <details> so we avoid its closed-state
 * layout collapse. */

.nav-toggle-input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
  width: 0;
  height: 0;
}

.nav-toggle-btn {
  display: none;          /* visible only on mobile */
  cursor: pointer;
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
  color: var(--ink);
  border-radius: var(--r-1);
  transition: background var(--dur-1) var(--ease), color var(--dur-1) var(--ease);
}
.nav-toggle-btn:hover { color: var(--nib); }
.nav-toggle-btn svg { width: 22px; height: 22px; }
.nav-toggle-input:focus-visible + .nav-toggle-btn {
  outline: 2px solid var(--nib);
  outline-offset: 3px;
}

/* Animate hamburger to ✕ when open — little hover delight */
.nav-toggle-btn .bar { transition: transform var(--dur-2) var(--ease), opacity var(--dur-2) var(--ease); transform-origin: center; }
.nav-toggle-input:checked + .nav-toggle-btn .bar-top { transform: translateY(5px) rotate(45deg); }
.nav-toggle-input:checked + .nav-toggle-btn .bar-mid { opacity: 0; }
.nav-toggle-input:checked + .nav-toggle-btn .bar-btm { transform: translateY(-5px) rotate(-45deg); }

@media (max-width: 768px) {
  .nav-toggle-btn { display: inline-flex; }

  /* Hide nav by default on mobile; show only when checkbox is checked */
  .primary-nav { display: none; }
  .nav-toggle-input:checked ~ .primary-nav {
    display: block;
    position: absolute;
    top: 100%;
    right: var(--s-5);
    left: var(--s-5);
    min-width: 220px;
    background: var(--paper);
    border: 1px solid var(--graphite);
    border-top: 0;
    padding: var(--s-3) var(--s-5) var(--s-4);
    box-shadow: 0 14px 24px rgba(0, 0, 0, 0.18);
    z-index: 30;
  }

  .primary-nav .nav-list {
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
  }
  .primary-nav .nav-list li {
    width: 100%;
    border-bottom: 1px solid var(--graphite);
  }
  .primary-nav .nav-list li:last-child { border-bottom: 0; }
  .primary-nav .nav-list a {
    display: block;
    width: 100%;
    padding: var(--s-4) 0;
  }
  .primary-nav .nav-list .nav-repo {
    border-left: 0;
    padding-left: 0;
    margin-left: 0;
  }
}

/* ═══════════════════════════════════════════════════════════════════════
 * 6. HERO
 * ═══════════════════════════════════════════════════════════════════════ */

.hero {
  position: relative;
  padding: var(--s-9) 0 var(--s-8);
  overflow: hidden;
}

/* Bold grid mask behind hero, fading out */
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--grid-line-strong) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line-strong) 1px, transparent 1px);
  background-size: 72px 72px;
  background-position: center top;
  mask-image: radial-gradient(ellipse 90% 65% at 35% 40%, #000 30%, transparent 80%);
  -webkit-mask-image: radial-gradient(ellipse 90% 65% at 35% 40%, #000 30%, transparent 80%);
  pointer-events: none;
}

.hero-grid {
  display: grid;
  gap: var(--s-8);
  grid-template-columns: minmax(0, 1fr);
  align-items: start;
  position: relative;
}

@media (min-width: 960px) {
  .hero-grid {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
    gap: var(--s-8);
    align-items: center;
  }
}

@media (min-width: 1280px) {
  .hero-grid {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr);
    gap: var(--s-9);
  }
}

.hero-text {
  max-width: 44rem;
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--s-3);
  margin-bottom: var(--s-5);
}
.hero-eyebrow .plate { color: var(--ink-3); }
.hero-eyebrow .dash {
  height: 1px;
  width: 28px;
  background: var(--nib);
}
.hero-eyebrow .tag {
  font-family: var(--type-mono);
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--nib);
}

.pitch {
  font-family: var(--type-serif);
  font-size: clamp(2.2rem, 3vw + 1.1rem, 3.6rem);
  line-height: 1.05;
  letter-spacing: -0.022em;
  margin: 0 0 var(--s-6) 0;
  font-weight: 500;
  max-width: 24ch;
  text-wrap: balance;
}

.hero-lede,
.hero-text > p {
  max-width: 48ch;
}
.pitch em {
  font-style: italic;
  color: var(--nib);
}

.framing {
  list-style: none;
  padding: 0;
  margin: 0 0 var(--s-6) 0;
  font-family: var(--type-mono);
  font-size: 0.92rem;
  color: var(--ink-2);
  line-height: 1.9;
  letter-spacing: 0.02em;
  border-left: 1px solid var(--graphite);
  padding-left: var(--s-5);
}
.framing li {
  position: relative;
  padding-left: var(--s-5);
}
.framing li::before {
  counter-increment: framing-step;
  content: counter(framing-step, decimal-leading-zero);
  position: absolute;
  left: 0;
  color: var(--nib);
  font-weight: 500;
}
.framing {
  counter-reset: framing-step;
}

.hero-lede {
  color: var(--ink-2);
  font-size: 1.05rem;
  line-height: 1.7;
  max-width: 36ch;
  margin-bottom: var(--s-6);
}
.hero-lede em { color: var(--ink); font-style: italic; }

/* Hero aside — the schematic */
.hero-aside {
  position: relative;
}

.hero-schematic {
  width: 100%;
  height: auto;
  color: var(--nib);
}

.hero-schematic .line { stroke: currentColor; fill: none; }
.hero-schematic .dim { stroke: var(--ink-4); fill: none; stroke-width: 0.5; }
.hero-schematic .label {
  fill: var(--ink-2);
  font-family: var(--type-mono);
  font-size: 7px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.hero-schematic .node-label {
  fill: var(--ink);
  font-family: var(--type-serif);
  font-size: 10px;
  font-style: italic;
}
.hero-schematic .coord {
  fill: var(--ink-3);
  font-family: var(--type-mono);
  font-size: 5.5px;
  letter-spacing: 0.1em;
}
/* Rect fills: hardcoded `fill="#0c1117"` attribute on each rect handles
 * dark mode (the default). Light-mode override via external CSS below —
 * presentation attributes have lower specificity than CSS, so the media
 * query wins when it matches. No variables in SVG. */
.hero-schematic .node {
  stroke: currentColor;
  stroke-width: 1.25;
}
.hero-schematic .node-accent {
  stroke: var(--nib);
  stroke-width: 1;
}

@media (prefers-color-scheme: light) {
  .hero-schematic .node,
  .hero-schematic .node-accent {
    fill: #f2ecd8;
  }
}
/* Scroll-triggered schematic reveal.
 * Elements start "un-drawn". When the SVG enters the viewport via
 * IntersectionObserver (site.js), `.in-view` is added and transitions fire. */

.hero-schematic .trace-line {
  stroke: var(--nib);
  stroke-width: 1.25;
  fill: none;
  /* pathLength="1" on the <path> normalizes the path, so dash = 1 covers the
   * full length regardless of the actual curve length. Fixes the prior bug
   * where a fixed 280-unit dash was shorter than the real path, clipping the
   * Tests → Code segment. */
  stroke-dasharray: 1;
  stroke-dashoffset: 1;
  transition: stroke-dashoffset 1.8s var(--ease-out);
}
.hero-schematic.in-view .trace-line {
  stroke-dashoffset: 0;
  transition-delay: 0.3s;
}

.hero-schematic .fade-in {
  opacity: 0;
  transition: opacity 0.6s var(--ease-out);
}
.hero-schematic.in-view .fade-in {
  opacity: 1;
  transition-delay: var(--d, 0s);
}

.hero-schematic .cascade-leader {
  opacity: 0;
  transition: opacity 0.7s var(--ease-out) 1.5s;
}
.hero-schematic.in-view .cascade-leader {
  opacity: 0.7;
}

/* Buttons */
.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--s-3);
  align-items: center;
}

.button {
  display: inline-flex;
  align-items: center;
  gap: var(--s-2);
  padding: 0.7rem 1.3rem;
  font-family: var(--type-mono);
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  font-weight: 500;
  border: 1px solid var(--ink-4);
  color: var(--ink);
  background: transparent;
  border-radius: var(--r-1);
  transition: all var(--dur-2) var(--ease);
  position: relative;
  text-decoration: none;
  border-bottom-width: 1px;
}
.button:hover {
  border-color: var(--nib);
  color: var(--nib);
  transform: translateY(-1px);
}
.button .arr {
  display: inline-block;
  transition: transform var(--dur-2) var(--ease);
}
.button:hover .arr { transform: translateX(3px); }

.button-primary {
  background: var(--nib);
  border-color: var(--nib);
  color: var(--paper);
}
.button-primary:hover {
  background: var(--nib-2);
  border-color: var(--nib-2);
  color: var(--paper);
}

/* ═══════════════════════════════════════════════════════════════════════
 * 7. SECTION CHROME (plate headings, rhythm)
 * ═══════════════════════════════════════════════════════════════════════ */

.section {
  padding: var(--s-8) 0;
  position: relative;
}

.section-head {
  display: grid;
  gap: var(--s-4);
  grid-template-columns: 1fr;
  margin-bottom: var(--s-6);
  max-width: 48rem;
}

.section-head h2 {
  font-size: clamp(1.6rem, 1.4vw + 1.1rem, 2.3rem);
  margin: 0;
  line-height: 1.1;
}

.section-head .lede {
  color: var(--ink-2);
  font-size: 1.02rem;
  margin: 0;
  max-width: 52ch;
}

.section-divider {
  height: 0;
  border: 0;
  border-top: 1px solid var(--graphite);
  margin: 0;
}

/* ═══════════════════════════════════════════════════════════════════════
 * 8. QUICKSTART
 * ═══════════════════════════════════════════════════════════════════════ */

.quickstart {
  padding: var(--s-7) 0 var(--s-6);
}

.quickstart-shell {
  display: grid;
  gap: var(--s-7);
  grid-template-columns: minmax(0, 1fr);
  align-items: start;
}

@media (min-width: 900px) {
  .quickstart-shell {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.6fr);
    gap: var(--s-8);
  }
}

.quickstart-meta, .quickstart-card { min-width: 0; }

.quickstart-meta { min-width: 0; }
.quickstart-meta h2 {
  margin-top: var(--s-2);
  font-size: clamp(1.5rem, 1.2vw + 1rem, 2rem);
}
.quickstart-meta .lede {
  color: var(--ink-2);
  margin-bottom: var(--s-5);
}
.quickstart-meta .extras {
  margin-top: var(--s-5);
  padding-top: var(--s-5);
  border-top: 1px solid var(--graphite);
  color: var(--ink-3);
  font-size: 0.92rem;
}

.quickstart-card {
  background: var(--paper-2);
  border: 1px solid var(--graphite);
  padding: var(--s-6) var(--s-6) var(--s-5);
  border-radius: var(--r-2);
  position: relative;
}

.quickstart-steps {
  list-style: none;
  padding: 0;
  margin: 0;
  counter-reset: qsstep;
  display: flex;
  flex-direction: column;
  gap: var(--s-4);
}

.quickstart-steps li {
  counter-increment: qsstep;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  column-gap: var(--s-4);
  align-items: start;
}

.qs-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border: 1px solid var(--nib);
  color: var(--nib);
  font-family: var(--type-mono);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  margin-top: 2px;
  flex-shrink: 0;
  position: relative;
}
.qs-mark::before {
  content: counter(qsstep, decimal-leading-zero);
}
/* Tiny dimension tick on the right of the mark — decorative */
.qs-mark::after {
  content: "";
  position: absolute;
  right: -8px;
  top: 50%;
  width: 6px;
  height: 1px;
  background: var(--nib);
  opacity: 0.6;
}

.qs-cmd {
  display: block;
  font-family: var(--type-mono);
  font-size: 0.92rem;
  padding: var(--s-2) var(--s-4);
  background: var(--paper-3);
  border: 1px solid var(--graphite);
  border-radius: var(--r-1);
  color: var(--ink);
  overflow-x: auto;
  white-space: pre;
  word-break: normal;
}
.qs-note {
  margin-top: var(--s-2);
  color: var(--ink-3);
  font-size: 0.88rem;
}

/* ═══════════════════════════════════════════════════════════════════════
 * 9. DEMO (asciinema placeholder)
 * ═══════════════════════════════════════════════════════════════════════ */

.demo {
  padding: var(--s-8) 0;
}

/* Demo section — two-column on wide viewports. Text on the left acts as a
 * caption; the asciinema player sits on the right as the primary artifact.
 * Collapses to single column below 960px. */
.demo-grid {
  display: grid;
  gap: var(--s-7);
  grid-template-columns: minmax(0, 1fr);
  align-items: start;
}

@media (min-width: 960px) {
  .demo-grid {
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1fr);
    gap: var(--s-8);
  }
}

.demo-head { max-width: 40rem; }

.demo-frame {
  background: var(--paper-2);
  border: 1px solid var(--graphite);
  border-radius: var(--r-2);
  /* Thin cream mat around the player. Top padding reserves room for the
   * absolute-positioned .demo-plate; bottom/sides are tight. */
  padding: var(--s-6) var(--s-3) var(--s-3);
  position: relative;
  margin: 0;
  width: 100%;
  /* Cap the frame so the terminal type stays compact within its column. */
  max-width: 720px;
}

/* Asciinema injects a <div class="asciicast"> as a direct child of .demo-frame.
 * Let it fill the frame's remaining width (no extra cap). */
.demo-frame .asciicast {
  width: 100%;
  margin: 0;
  display: block;
}

.demo-plate {
  position: absolute;
  top: var(--s-3);
  left: var(--s-4);
  font-family: var(--type-mono);
  font-size: 0.68rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--ink-3);
}
.demo-plate .num { color: var(--nib); margin-right: var(--s-2); }

.demo-stamp {
  position: absolute;
  top: var(--s-3);
  right: var(--s-4);
  font-family: var(--type-mono);
  font-size: 0.62rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--ink-3);
  border: 1px solid var(--ink-4);
  padding: 2px 6px;
}

.demo-placeholder {
  text-align: center;
  padding: var(--s-6) 0;
  color: var(--ink-3);
}
.demo-placeholder h3 {
  color: var(--ink);
  margin-bottom: var(--s-2);
  font-style: italic;
}
.demo-placeholder p { margin: var(--s-2) 0; max-width: 52ch; margin-inline: auto; }
.demo-placeholder .trace {
  margin-top: var(--s-4);
  font-family: var(--type-mono);
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  color: var(--ink-3);
}
.demo-placeholder .trace code { font-size: 0.85em; }

/* ═══════════════════════════════════════════════════════════════════════
 * 10. PATHS (four-way chooser on home)
 * ═══════════════════════════════════════════════════════════════════════ */

.paths {
  padding: var(--s-8) 0 var(--s-9);
}

.paths-grid {
  display: grid;
  gap: var(--s-4);
  grid-template-columns: 1fr;
  margin-top: var(--s-6);
}
@media (min-width: 640px) {
  .paths-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 1100px) {
  .paths-grid { grid-template-columns: repeat(4, 1fr); }
}

.path-card {
  display: flex;
  flex-direction: column;
  gap: var(--s-3);
  background: var(--paper-2);
  border: 1px solid var(--graphite);
  padding: var(--s-5) var(--s-5) var(--s-5);
  color: var(--ink);
  position: relative;
  border-radius: var(--r-2);
  text-decoration: none;
  border-bottom-width: 1px;
  transition: border-color var(--dur-2) var(--ease), transform var(--dur-2) var(--ease), background var(--dur-2) var(--ease);
  min-height: 180px;
}
.path-card:hover {
  border-color: var(--nib);
  transform: translateY(-2px);
  background: var(--paper-2);
}
.path-card .plate-num {
  font-family: var(--type-mono);
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  color: var(--ink-3);
  margin-bottom: var(--s-2);
}
.path-card .plate-num .n { color: var(--nib); }
.path-card h3 {
  margin: 0 0 var(--s-2) 0;
  font-size: 1.15rem;
  font-family: var(--type-serif);
  font-weight: 500;
  font-style: italic;
  letter-spacing: -0.005em;
}
.path-card p {
  margin: 0;
  color: var(--ink-2);
  font-size: 0.94rem;
  line-height: 1.55;
  flex: 1;
}
.path-card .go {
  margin-top: var(--s-4);
  font-family: var(--type-mono);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--nib);
  display: inline-flex;
  gap: var(--s-2);
  align-items: center;
}
.path-card .go::after {
  content: "→";
  transition: transform var(--dur-2) var(--ease);
}
.path-card:hover .go::after { transform: translateX(4px); }

/* Corner marks on path cards */
.path-card::before,
.path-card::after {
  content: "";
  position: absolute;
  width: 8px;
  height: 8px;
  pointer-events: none;
  opacity: 0;
  transition: opacity var(--dur-2) var(--ease);
}
.path-card::before {
  top: -1px; left: -1px;
  border-top: 1px solid var(--nib);
  border-left: 1px solid var(--nib);
}
.path-card::after {
  bottom: -1px; right: -1px;
  border-bottom: 1px solid var(--nib);
  border-right: 1px solid var(--nib);
}
.path-card:hover::before,
.path-card:hover::after { opacity: 1; }

/* ═══════════════════════════════════════════════════════════════════════
 * 11. INNER PAGES (Start, Examples, Anti-patterns)
 * ═══════════════════════════════════════════════════════════════════════ */

.page {
  padding: var(--s-8) 0 var(--s-9);
}

.page-header {
  display: grid;
  gap: var(--s-5);
  grid-template-columns: minmax(0, 1fr);
  margin-bottom: var(--s-8);
  align-items: end;
  padding-bottom: var(--s-6);
  border-bottom: 1px solid var(--graphite);
}

@media (min-width: 900px) {
  .page-header {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
    gap: var(--s-8);
    align-items: end;
  }
}

.page-header-main h1 {
  font-size: clamp(2rem, 2vw + 1.2rem, 3.2rem);
  margin: var(--s-3) 0 var(--s-4);
  max-width: 16ch;
  letter-spacing: -0.02em;
  text-wrap: balance;
}
.page-header-main h1 em {
  font-style: italic;
  color: var(--nib);
}

.page-header-main .lede {
  color: var(--ink-2);
  font-size: 1.08rem;
  max-width: 44ch;
  margin: 0;
}

.page-header-aside {
  font-family: var(--type-mono);
  font-size: 0.78rem;
  color: var(--ink-3);
  line-height: 1.7;
  letter-spacing: 0.02em;
}
.page-header-aside dl {
  margin: 0;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: var(--s-2) var(--s-4);
}
.page-header-aside dt {
  color: var(--ink-3);
  font-size: 0.66rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  align-self: center;
}
.page-header-aside dd {
  margin: 0;
  color: var(--ink-2);
}
.page-header-aside dd a { border-bottom: 0; }

/* Audience / section sub-blocks on inner pages */
.audience {
  display: grid;
  gap: var(--s-5);
  grid-template-columns: minmax(0, 1fr);
  padding: var(--s-7) 0;
  border-bottom: 1px dashed var(--graphite);
}

.audience:last-of-type { border-bottom: 0; }

@media (min-width: 900px) {
  .audience {
    grid-template-columns: minmax(0, 0.28fr) minmax(0, 1fr);
    gap: var(--s-8);
  }
}

.audience-tag {
  font-family: var(--type-mono);
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-3);
  display: flex;
  flex-direction: column;
  gap: var(--s-1);
}
.audience-tag .num {
  color: var(--nib);
  font-size: 1.5rem;
  font-family: var(--type-serif);
  font-style: italic;
  letter-spacing: 0;
}
.audience-tag .label-row {
  font-size: 0.68rem;
  letter-spacing: 0.2em;
}

.audience-body h2 {
  margin: 0 0 var(--s-4);
  font-size: clamp(1.3rem, 0.8vw + 1rem, 1.7rem);
  font-style: italic;
  font-weight: 500;
  letter-spacing: -0.01em;
}
.audience-body p { max-width: 58ch; color: var(--ink); }
.audience-body p.muted { color: var(--ink-2); }
.audience-body .cmd {
  background: var(--paper-2);
  border: 1px solid var(--graphite);
  border-left: 3px solid var(--nib);
  padding: var(--s-4) var(--s-5);
  font-family: var(--type-mono);
  font-size: 0.88rem;
  color: var(--ink);
  border-radius: 0 var(--r-2) var(--r-2) 0;
  margin: var(--s-4) 0;
  overflow-x: auto;
  line-height: 1.7;
}
.audience-body .cmd .comment { color: var(--ink-3); }
.audience-body .readmore {
  display: inline-flex;
  align-items: center;
  gap: var(--s-2);
  font-family: var(--type-mono);
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--nib);
  border-bottom: 0;
  margin-top: var(--s-3);
}
.audience-body .readmore::after {
  content: "→";
  transition: transform var(--dur-2) var(--ease);
}
.audience-body .readmore:hover::after { transform: translateX(4px); }

/* Example cards (Examples page) */
.example-grid {
  display: grid;
  gap: var(--s-5);
  grid-template-columns: 1fr;
  margin-top: var(--s-6);
}
@media (min-width: 860px) {
  .example-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--s-6);
  }
}

.example-card {
  background: var(--paper-2);
  border: 1px solid var(--graphite);
  padding: var(--s-6);
  border-radius: var(--r-2);
  position: relative;
  display: flex;
  flex-direction: column;
  gap: var(--s-3);
}

.example-card .tag {
  display: inline-flex;
  align-items: center;
  gap: var(--s-2);
  font-family: var(--type-mono);
  font-size: 0.68rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-3);
  padding: 2px 0;
}
.example-card .tag::before {
  content: "";
  display: inline-block;
  width: 10px;
  height: 1px;
  background: var(--nib);
}
.example-card h2 {
  margin: 0;
  font-family: var(--type-serif);
  font-style: italic;
  font-weight: 500;
  font-size: 1.35rem;
  letter-spacing: -0.005em;
}
.example-card p { color: var(--ink-2); font-size: 0.96rem; line-height: 1.6; }
.example-card .foot {
  margin-top: auto;
  font-size: 0.86rem;
  color: var(--ink-3);
}
.example-card .foot code { font-size: 0.8em; }
.example-card .cross {
  display: inline-flex;
  align-items: center;
  gap: var(--s-2);
  font-family: var(--type-mono);
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--nib);
  border-bottom: 0;
  margin-top: var(--s-3);
}
.example-card .cross::after {
  content: "→";
  transition: transform var(--dur-2) var(--ease);
}
.example-card:hover .cross::after { transform: translateX(4px); }

/* Anti-patterns list */
.ap-list {
  list-style: none;
  padding: 0;
  margin: var(--s-7) 0 0;
  display: grid;
  gap: 0;
}

.ap-item {
  position: relative;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: var(--s-5);
  padding: var(--s-6) 0;
  border-top: 1px solid var(--graphite);
  align-items: start;
}
.ap-item:last-child { border-bottom: 1px solid var(--graphite); }

.ap-num {
  font-family: var(--type-mono);
  color: var(--nib);
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  margin-top: 0.3em;
  position: relative;
  min-width: 3.4ch;
}
.ap-num::after {
  content: "×";
  position: absolute;
  left: 4.2ch;
  top: -0.1em;
  color: var(--ink-4);
  font-family: var(--type-serif);
  font-size: 1.1rem;
  font-style: italic;
}
.ap-body h3 {
  margin: 0 0 var(--s-3);
  font-size: 1.2rem;
  font-family: var(--type-serif);
  font-weight: 500;
  font-style: italic;
}
.ap-body p { max-width: 62ch; color: var(--ink-2); margin: 0; }

/* Examples page — "what about LID itself" epilogue block */
.epilogue {
  margin-top: var(--s-9);
  padding: var(--s-6) var(--s-7);
  background: var(--paper-2);
  border-left: 2px solid var(--nib);
  border-radius: 0 var(--r-2) var(--r-2) 0;
  max-width: 56rem;
}
.epilogue h2 {
  margin-top: 0;
  font-size: 1.3rem;
  font-style: italic;
}
.epilogue p {
  color: var(--ink-2);
  margin-bottom: 0;
  max-width: 66ch;
}

/* ═══════════════════════════════════════════════════════════════════════
 * 12. FOOTER
 * ═══════════════════════════════════════════════════════════════════════ */

.site-footer {
  margin-top: var(--s-9);
  padding: var(--s-7) 0 var(--s-8);
  border-top: 1px solid var(--graphite);
  background: var(--paper);
  position: relative;
}

.site-footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  height: 8px;
  width: 100%;
  max-width: var(--page-max);
  background-image: repeating-linear-gradient(
    90deg,
    var(--ink-4) 0 1px,
    transparent 1px 12px
  );
  opacity: 0.35;
}

.footer-grid {
  display: grid;
  gap: var(--s-6);
  grid-template-columns: 1fr;
  align-items: start;
}
@media (min-width: 700px) {
  .footer-grid { grid-template-columns: 1fr auto; gap: var(--s-8); }
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: var(--s-2);
}
.footer-brand .mark {
  display: inline-flex;
  align-items: center;
  gap: var(--s-2);
  font-family: var(--type-mono);
  font-size: 0.75rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--ink);
}
.footer-brand .mark::before {
  content: "";
  display: inline-block;
  width: 14px;
  height: 14px;
  border: 1px solid var(--nib);
  margin-right: var(--s-2);
  position: relative;
}
.footer-brand .meta {
  color: var(--ink-3);
  font-family: var(--type-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
}
.footer-brand .trace {
  margin-top: var(--s-3);
  color: var(--ink-3);
  font-size: 0.85rem;
  font-family: var(--type-serif);
  font-style: italic;
  max-width: 42ch;
}
.footer-brand .trace a { border-bottom: 0; }
.footer-brand .trace a:hover { color: var(--nib-2); text-decoration: underline; text-underline-offset: 3px; }

.footer-meta {
  display: flex;
  flex-direction: column;
  gap: var(--s-1);
  font-family: var(--type-mono);
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-3);
  text-align: left;
}
@media (min-width: 700px) {
  .footer-meta { text-align: right; }
}
.footer-meta .coord {
  color: var(--ink-3);
  opacity: 0.7;
}

/* ═══════════════════════════════════════════════════════════════════════
 * 13. COPY-TO-CLIPBOARD
 * ═══════════════════════════════════════════════════════════════════════ */

/* JS wraps every .qs-cmd and .audience-body .cmd in a .copy-wrap and injects
 * a .copy-btn. Button hidden until hover/focus; shows a check + "Copied"
 * pill on success. */

.copy-wrap {
  position: relative;
  display: block;
}

.copy-btn {
  position: absolute;
  top: 6px;
  right: 6px;
  width: 28px;
  height: 28px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--paper-2);
  border: 1px solid var(--graphite);
  color: var(--ink-2);
  cursor: pointer;
  padding: 0;
  border-radius: var(--r-1);
  opacity: 0;
  transform: translateY(-2px);
  transition: opacity var(--dur-1) var(--ease),
              transform var(--dur-1) var(--ease),
              color var(--dur-1) var(--ease),
              border-color var(--dur-1) var(--ease),
              background var(--dur-1) var(--ease);
}
.copy-btn svg { width: 14px; height: 14px; display: block; }
.copy-btn:hover { color: var(--nib); border-color: var(--nib); }
.copy-btn:focus-visible {
  opacity: 1;
  transform: translateY(0);
  outline: 2px solid var(--nib);
  outline-offset: 2px;
}

.copy-wrap:hover .copy-btn,
.copy-wrap:focus-within .copy-btn {
  opacity: 1;
  transform: translateY(0);
}

/* On touch devices the button stays visible — no hover to reveal it */
@media (hover: none) {
  .copy-btn { opacity: 0.6; transform: none; }
}

.copy-btn.is-copied {
  color: var(--nib);
  border-color: var(--nib);
  background: color-mix(in srgb, var(--nib) 10%, var(--paper-2));
}

.copy-btn.is-copied::after {
  content: "Copied";
  position: absolute;
  top: 50%;
  right: calc(100% + 8px);
  transform: translateY(-50%);
  padding: 3px 8px 2px;
  background: var(--paper-2);
  border: 1px solid var(--nib);
  color: var(--nib);
  font-family: var(--type-mono);
  font-size: 0.6rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  white-space: nowrap;
  border-radius: 2px;
  pointer-events: none;
  animation: copied-in 180ms var(--ease-out);
}

@keyframes copied-in {
  from { opacity: 0; transform: translate(6px, -50%); }
  to   { opacity: 1; transform: translate(0, -50%); }
}

/* ═══════════════════════════════════════════════════════════════════════
 * 14. UTILITIES
 * ═══════════════════════════════════════════════════════════════════════ */

.muted { color: var(--ink-2); }
.dim { color: var(--ink-3); }
.mono { font-family: var(--type-mono); }
.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Respect user preferences for motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}