/* ==========================================================================
   Smriti — landing page styles (v2.1 design pass)
   Pure HTML + CSS + a small amount of vanilla JS. No build step.
   Motif: braided agent lanes around hexagonal checkpoint stones.
   Palette: deep cool-black, ember (claude), indigo (codex), aurora (matches),
   warm off-white paper, hand-placed atmospheric warm spots, subtle grain.
   ========================================================================== */

/* ── Tokens ──────────────────────────────────────────────────────────────── */

:root {
  /* Surface */
  --ink-base: #070710;
  --ink-1: #0e0e1a;
  --ink-2: #16162a;
  --ink-3: #1d1d33;

  /* Type */
  --paper:        #e9e7e2;
  --paper-muted:  #8e8b96;
  --paper-dim:    #5a5764;
  --paper-faint:  #36343d;

  /* Signature */
  --ember:        #ffb663;
  --ember-2:      #ffd089;
  --ember-deep:   #d68a3a;
  --ember-soft:   rgba(255, 182, 99, 0.14);
  --ember-line:   rgba(255, 182, 99, 0.42);
  --ember-glow:   rgba(255, 182, 99, 0.22);

  /* Coordination — codex */
  --indigo:       #7c8cff;
  --indigo-2:     #a0adff;
  --indigo-soft:  rgba(124, 140, 255, 0.14);
  --indigo-line:  rgba(124, 140, 255, 0.42);
  --indigo-glow:  rgba(124, 140, 255, 0.18);

  /* Third pole — matches/done */
  --aurora:       #7be3b0;
  --aurora-soft:  rgba(123, 227, 176, 0.14);
  --aurora-line:  rgba(123, 227, 176, 0.42);

  /* Edges */
  --edge:         rgba(255, 255, 255, 0.05);
  --edge-strong:  rgba(255, 255, 255, 0.10);
  --edge-warm:    rgba(255, 182, 99, 0.10);

  /* Agent semantic */
  --agent-claude: var(--ember);
  --agent-codex:  var(--indigo);

  /* Type stack */
  --font-sans: -apple-system, BlinkMacSystemFont, "Inter", "Segoe UI", Roboto,
               Oxygen, Ubuntu, Cantarell, "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, "SF Mono", "JetBrains Mono", Menlo,
               "Cascadia Mono", "Roboto Mono", Consolas, monospace;
  --font-serif: ui-serif, "New York", "Iowan Old Style", Georgia, serif;

  /* Motion */
  --ease-out:    cubic-bezier(0.16, 1, 0.3, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
  --t-fast:  180ms;
  --t-base:  420ms;
  --t-slow:  820ms;
  --t-flow:  1400ms;

  /* Layout */
  --w-narrow:  720px;
  --w-default: 960px;
  --w-wide:    1180px;
  --r-sm: 3px;
  --r-md: 6px;
  --r-lg: 10px;
  --r-pill: 999px;
}

/* ── Reset + base ────────────────────────────────────────────────────────── */

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  background: var(--ink-base);
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 17px;
  line-height: 1.6;
  color: var(--paper);
  background: var(--ink-base);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  font-feature-settings: "ss01", "cv11", "kern", "liga";
  position: relative;
  overflow-x: hidden;
}

/* Grain texture — subtle SVG noise overlay, fixed-attached */
body::before {
  content: "";
  position: fixed;
  inset: -20%;
  pointer-events: none;
  z-index: 1;
  opacity: 0.05;
  mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 200 200'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/><feColorMatrix values='0 0 0 0 0.95  0 0 0 0 0.9  0 0 0 0 0.85  0 0 0 1 0'/></filter><rect width='200' height='200' filter='url(%23n)'/></svg>");
  background-size: 180px 180px;
}

/* Atmospheric ember anchors — hand-placed warm spots that signal hierarchy.
   Two regions: under the hero, around the centerpiece. */
body::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background-image:
    radial-gradient(ellipse 60% 35% at 22% 8%,   rgba(255, 182, 99, 0.12), transparent 65%),
    radial-gradient(ellipse 30% 18% at 75% 4%,   rgba(124, 140, 255, 0.06), transparent 70%),
    radial-gradient(ellipse 50% 24% at 50% 40%,  rgba(255, 182, 99, 0.05), transparent 75%),
    radial-gradient(ellipse 40% 22% at 50% 95%,  rgba(255, 182, 99, 0.07), transparent 75%);
}

main, header, footer, section { position: relative; z-index: 2; }

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

a { color: var(--ember); text-decoration: none; }
a:hover { color: var(--ember-2); }

code, pre {
  font-family: var(--font-mono);
  font-size: 0.92em;
}

code {
  color: var(--paper);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--edge);
  padding: 0.1em 0.4em;
  border-radius: var(--r-sm);
}

pre {
  background: var(--ink-1);
  border: 1px solid var(--edge);
  border-radius: var(--r-md);
  padding: 1rem 1.25rem;
  overflow-x: auto;
  line-height: 1.55;
  margin: 1rem 0;
}

pre code {
  background: transparent;
  border: none;
  padding: 0;
}

::selection {
  background: var(--ember-soft);
  color: var(--ember-2);
}

/* ── Container + section primitives ──────────────────────────────────────── */

.container {
  max-width: var(--w-default);
  margin: 0 auto;
  padding: 0 1.5rem;
}

.container-narrow { max-width: var(--w-narrow); }
.container-wide   { max-width: var(--w-wide);   }

.section {
  padding: 6.5rem 0;
  position: relative;
}

.section + .section { border-top: 1px solid var(--edge); }

.section-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  font-size: 0.74rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--paper-dim);
  margin: 0 0 1.2rem;
  font-weight: 600;
  font-family: var(--font-mono);
}

.section-eyebrow::before {
  content: "";
  width: 22px;
  height: 1px;
  background: var(--ember);
  flex-shrink: 0;
}

.section h2 {
  font-size: clamp(1.85rem, 3.6vw, 2.65rem);
  line-height: 1.08;
  letter-spacing: -0.025em;
  margin: 0 0 1.5rem;
  font-weight: 600;
  color: var(--paper);
}

.section h2 .accent { color: var(--ember); }
.section h2 .alt    { color: var(--indigo); }

.section h3 {
  font-size: 1.05rem;
  margin: 0 0 0.5rem;
  letter-spacing: -0.01em;
  font-weight: 600;
}

.section .lede {
  font-size: 1.12rem;
  color: var(--paper-muted);
  max-width: 640px;
  margin: 0 0 2.5rem;
  line-height: 1.55;
}

.section .lede strong { color: var(--paper); font-weight: 600; }

.section p { margin: 0 0 1rem; color: var(--paper-muted); }
.section p strong { color: var(--paper); }

.section .caption {
  font-size: 0.88rem;
  color: var(--paper-dim);
  margin-top: 2rem;
  max-width: 680px;
  line-height: 1.6;
  font-style: italic;
  font-family: var(--font-serif);
}

.section .caption code {
  font-style: normal;
  font-family: var(--font-mono);
}

/* ── Buttons ─────────────────────────────────────────────────────────────── */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.78rem 1.55rem;
  border-radius: var(--r-pill);
  font-weight: 500;
  font-size: 0.95rem;
  text-decoration: none;
  border: 1px solid transparent;
  transition: background var(--t-fast) var(--ease-out),
              color var(--t-fast) var(--ease-out),
              border-color var(--t-fast) var(--ease-out),
              transform var(--t-fast) var(--ease-out),
              box-shadow var(--t-fast) var(--ease-out);
  cursor: pointer;
  font-family: inherit;
  letter-spacing: -0.005em;
}

.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }

.btn-primary {
  background: var(--ember);
  color: #1a1004;
  box-shadow: 0 0 0 1px var(--ember-deep) inset,
              0 8px 24px -8px var(--ember-glow);
}

.btn-primary:hover {
  background: var(--ember-2);
  color: #1a1004;
  text-decoration: none;
  box-shadow: 0 0 0 1px var(--ember-deep) inset,
              0 12px 32px -8px var(--ember-glow);
}

.btn-secondary {
  background: transparent;
  color: var(--paper);
  border-color: var(--edge-strong);
  border-radius: var(--r-pill);
}

.btn-secondary:hover {
  border-color: var(--paper-muted);
  background: rgba(255, 255, 255, 0.03);
  text-decoration: none;
  color: var(--paper);
}

.btn-ghost {
  background: transparent;
  color: var(--paper-muted);
  border: none;
  padding: 0.45rem 0.85rem;
  font-size: 0.85rem;
  border-radius: var(--r-md);
}

.btn-ghost:hover {
  color: var(--paper);
  background: rgba(255, 255, 255, 0.04);
  text-decoration: none;
}

/* ── Header ──────────────────────────────────────────────────────────────── */

.site-header {
  border-bottom: 1px solid var(--edge);
  padding: 1rem 0;
  position: sticky;
  top: 0;
  background: rgba(7, 7, 16, 0.7);
  backdrop-filter: blur(14px) saturate(140%);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
  z-index: 50;
}

.header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-weight: 600;
  font-size: 1.05rem;
  letter-spacing: -0.015em;
  color: var(--paper);
}

.brand:hover { color: var(--paper); text-decoration: none; }

.brand-mark {
  width: 22px;
  height: 22px;
  flex-shrink: 0;
  position: relative;
}

.brand-mark .stone {
  fill: var(--ember);
  filter: drop-shadow(0 0 6px var(--ember-glow));
}

.brand-mark .pulse {
  transform-origin: center;
  transform-box: fill-box;
  animation: brand-pulse 5.4s var(--ease-out) infinite;
}

@keyframes brand-pulse {
  0%, 80%, 100% { opacity: 0; transform: scale(1); }
  10%           { opacity: 0.55; transform: scale(1); }
  30%           { opacity: 0; transform: scale(2.2); }
}

.site-header nav {
  display: flex;
  gap: 1.75rem;
  font-size: 0.92rem;
  align-items: center;
}

.site-header nav a {
  color: var(--paper-muted);
  transition: color var(--t-fast) var(--ease-out);
  position: relative;
}

.site-header nav a::after {
  content: "";
  position: absolute;
  left: 0; right: 0;
  bottom: -4px;
  height: 1px;
  background: var(--ember);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--t-base) var(--ease-out);
}

.site-header nav a:hover { color: var(--paper); text-decoration: none; }
.site-header nav a:hover::after { transform: scaleX(1); }

.site-header nav .nav-cta {
  color: var(--paper);
  border: 1px solid var(--edge-strong);
  padding: 0.45rem 0.9rem;
  border-radius: var(--r-pill);
  transition: border-color var(--t-fast) var(--ease-out),
              background var(--t-fast) var(--ease-out);
}

.site-header nav .nav-cta::after { display: none; }
.site-header nav .nav-cta:hover {
  border-color: var(--ember-line);
  background: var(--ember-soft);
  color: var(--paper);
}

/* ── Hero ────────────────────────────────────────────────────────────────── */

.hero {
  padding: 7rem 0 6rem;
  position: relative;
  overflow: visible;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
  gap: 3.5rem;
  align-items: center;
}

.hero-copy h1 {
  font-size: clamp(2.4rem, 6.2vw, 4.1rem);
  line-height: 1.02;
  letter-spacing: -0.035em;
  margin: 0 0 1.4rem;
  font-weight: 600;
  color: var(--paper);
}

.hero-copy h1 .l1,
.hero-copy h1 .l2 { display: block; }

.hero-copy h1 .l2 {
  color: var(--ember);
  background: linear-gradient(180deg, var(--ember) 0%, var(--ember-deep) 110%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-sub {
  font-size: 1.18rem;
  color: var(--paper-muted);
  max-width: 540px;
  margin: 0 0 2.25rem;
  line-height: 1.55;
}

.hero-sub strong {
  color: var(--paper);
  font-weight: 500;
  background: linear-gradient(180deg, transparent 65%, var(--ember-soft) 65%);
  padding: 0 0.15em;
}

.hero-cta {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  align-items: center;
}

.hero-meta {
  margin-top: 2rem;
  font-size: 0.84rem;
  color: var(--paper-dim);
  display: flex;
  gap: 1.5rem;
  flex-wrap: wrap;
  font-family: var(--font-mono);
}

.hero-meta span { display: inline-flex; align-items: center; gap: 0.5rem; }

.hero-meta .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--aurora);
  box-shadow: 0 0 0 3px var(--aurora-soft);
}

/* Hero braid — the establishing visual */
.hero-braid {
  position: relative;
  width: 100%;
  aspect-ratio: 600 / 380;
  max-width: 580px;
  margin-left: auto;
}

.hero-braid svg {
  width: 100%;
  height: 100%;
  overflow: visible;
}

/* Braid styling */
.braid .strand {
  fill: none;
  stroke-width: 1.6;
  stroke-linecap: round;
}

.braid .strand.claude {
  stroke: var(--ember);
  filter: drop-shadow(0 0 5px var(--ember-glow));
}

.braid .strand.codex {
  stroke: var(--indigo);
  filter: drop-shadow(0 0 5px var(--indigo-glow));
}

.braid .strand.faint {
  stroke-opacity: 0.35;
  filter: none;
}

/* Crossing patches — short over-segments redrawn on top of an under-segment
   to create proper braid over/under at the crossing midpoints. */
.braid .patch {
  fill: none;
  stroke-width: 2.4;
  stroke-linecap: round;
  stroke: var(--ink-base);
}

.braid .patch.claude { stroke: var(--ember); }
.braid .patch.codex  { stroke: var(--indigo); }

/* Animated sway on the strands — slow drift, very small amplitude */
.braid .sway {
  transform-origin: center center;
  animation: braid-sway 14s var(--ease-in-out) infinite alternate;
}

@keyframes braid-sway {
  0%   { transform: translateY(-1.5px) rotate(-0.2deg); }
  100% { transform: translateY(1.5px)  rotate(0.2deg);  }
}

/* Hexagonal checkpoint stones */
.braid .stone-group {
  cursor: default;
}

.braid .stone {
  fill: var(--ink-1);
  stroke: var(--edge-strong);
  stroke-width: 1;
  transition: fill var(--t-base) var(--ease-out);
}

.braid .stone.sealed { fill: var(--ink-2); stroke: var(--edge-strong); }
.braid .stone.wet {
  fill: var(--ink-2);
  stroke: var(--ember);
  filter: drop-shadow(0 0 12px var(--ember-glow));
}

.braid .stone-hash {
  font-family: var(--font-mono);
  font-size: 9.5px;
  fill: var(--paper-muted);
  letter-spacing: 0.04em;
}

.braid .stone.wet ~ .stone-hash,
.braid .stone-group.is-wet .stone-hash { fill: var(--ember); }

.braid .label {
  font-family: var(--font-mono);
  font-size: 10.5px;
  fill: var(--paper-dim);
  letter-spacing: 0.06em;
}

.braid .label.claude { fill: var(--ember); opacity: 0.85; }
.braid .label.codex  { fill: var(--indigo); opacity: 0.85; }

/* Hero wet stone pulse — only on the rightmost stone */
.braid .stone-pulse {
  fill: var(--ember);
  opacity: 0;
  transform-origin: center;
  transform-box: fill-box;
  animation: stone-pulse 3.4s var(--ease-out) infinite;
}

@keyframes stone-pulse {
  0%   { opacity: 0.4; transform: scale(1); }
  70%  { opacity: 0;   transform: scale(2.4); }
  100% { opacity: 0;   transform: scale(2.4); }
}

/* ── Section: Missing primitive (typographic glossary) ───────────────────── */

.glossary {
  margin: 2.5rem 0 0;
  max-width: 760px;
}

.glossary .gloss-header {
  display: grid;
  grid-template-columns: 1fr 1.6fr;
  gap: 2rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--edge);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--paper-dim);
  font-weight: 600;
}

.glossary .gloss-row {
  display: grid;
  grid-template-columns: 1fr 1.6fr;
  gap: 2rem;
  padding: 1.1rem 0;
  border-bottom: 1px solid var(--edge);
  align-items: baseline;
  position: relative;
}

.glossary .gloss-row:last-child { border-bottom: none; }

.glossary .gloss-row .git-term {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  color: var(--paper-muted);
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
}

.glossary .gloss-row .git-term::before {
  content: "";
  display: inline-block;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--ember);
  flex-shrink: 0;
}

.glossary .gloss-row.unmapped .git-term {
  color: var(--paper-dim);
  font-style: italic;
}

.glossary .gloss-row.unmapped .git-term::before {
  background: var(--indigo);
}

.glossary .gloss-row .smriti-block {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.glossary .gloss-row .smriti-term {
  font-family: var(--font-mono);
  font-size: 1rem;
  font-weight: 600;
  color: var(--paper);
  letter-spacing: -0.005em;
}

.glossary .gloss-row.unmapped .smriti-term { color: var(--indigo-2); }

.glossary .gloss-row .smriti-desc {
  color: var(--paper-muted);
  font-size: 0.95rem;
  line-height: 1.5;
}

.glossary-footnote {
  margin-top: 1.5rem;
  padding-top: 1rem;
  font-size: 0.88rem;
  color: var(--paper-dim);
  max-width: 720px;
  font-style: italic;
  font-family: var(--font-serif);
  line-height: 1.55;
}

.glossary-footnote .dot {
  display: inline-block;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--indigo);
  vertical-align: middle;
  margin: 0 0.4rem 2px;
}

/* ── Section: Markdown collapses vs structured ───────────────────────────── */

.collapse-pair {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  margin: 2.5rem 0 0;
  align-items: start;
}

.collapse-pair > * { min-width: 0; }

/* Left surface — markdown collapse */
.md-surface {
  position: relative;
  background: var(--ink-1);
  border: 1px solid var(--edge);
  border-radius: var(--r-md);
  overflow: hidden;
  font-family: var(--font-mono);
  font-size: 0.84rem;
  line-height: 1.7;
}

.md-surface .surface-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.55rem 1rem;
  border-bottom: 1px solid var(--edge);
  background: var(--ink-2);
  font-size: 0.72rem;
  color: var(--paper-dim);
  letter-spacing: 0.05em;
}

.md-surface .surface-bar .filename {
  font-family: var(--font-mono);
  color: var(--paper-muted);
}

.md-surface .surface-bar .badge {
  font-family: var(--font-mono);
  text-transform: uppercase;
  font-size: 0.65rem;
  letter-spacing: 0.12em;
  padding: 0.15rem 0.5rem;
  border-radius: var(--r-sm);
  background: rgba(217, 122, 114, 0.12);
  color: #d97a72;
}

.md-surface .surface-body {
  padding: 1.1rem 1.25rem 1.3rem;
  color: var(--paper-muted);
  min-height: 220px;
}

.md-surface .line { display: block; white-space: nowrap; overflow: hidden; }
.md-surface .line.h { color: var(--paper); font-weight: 600; margin-bottom: 0.25rem; }
.md-surface .line.claude { color: var(--ember); }
.md-surface .line.codex  { color: var(--indigo); }
.md-surface .line.struck { text-decoration: line-through; opacity: 0.5; }
.md-surface .indent-1 { padding-left: 1.1rem; }

.md-surface .typing-caret {
  display: inline-block;
  width: 7px;
  height: 1em;
  background: var(--ember);
  vertical-align: text-bottom;
  margin-left: 2px;
  animation: caret-blink 1.1s steps(2) infinite;
}

@keyframes caret-blink { 50% { opacity: 0; } }

.md-surface .surface-foot {
  padding: 0.85rem 1.25rem;
  border-top: 1px solid var(--edge);
  font-size: 0.84rem;
  color: var(--paper-muted);
  background: rgba(217, 122, 114, 0.05);
  font-family: var(--font-sans);
}

.md-surface .surface-foot strong { color: #d97a72; font-weight: 600; }

/* Right surface — structured checkpoint (notebook-flavored, no rounded chrome) */
.cp-surface {
  position: relative;
  background: var(--ink-1);
  border: 1px solid var(--edge);
  border-radius: var(--r-md);
  padding: 1.35rem 1.5rem 1.5rem;
  font-family: var(--font-mono);
  font-size: 0.86rem;
  line-height: 1.75;
  background-image:
    linear-gradient(180deg, transparent 0, transparent calc(1.75em - 1px), var(--edge) calc(1.75em - 1px), var(--edge) 1.75em, transparent 1.75em);
  background-size: 100% 1.75em;
  background-position: 0 1.7rem;
}

.cp-surface .cp-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.8rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--paper-dim);
  letter-spacing: 0.05em;
}

.cp-surface .cp-bar .filename { color: var(--ember); }

.cp-surface .cp-bar .badge {
  font-family: var(--font-mono);
  text-transform: uppercase;
  font-size: 0.65rem;
  letter-spacing: 0.12em;
  padding: 0.15rem 0.5rem;
  border-radius: var(--r-sm);
  background: var(--aurora-soft);
  color: var(--aurora);
}

.cp-surface .ln { display: block; color: var(--paper-muted); }
.cp-surface .ln .k { color: var(--paper); font-weight: 600; }
.cp-surface .ln .v { color: var(--ember); }
.cp-surface .ln .vi { color: var(--indigo); }
.cp-surface .ln .id { color: var(--paper-dim); font-style: italic; }
.cp-surface .ln.in-1 { padding-left: 1.2rem; }
.cp-surface .ln.in-2 { padding-left: 2.4rem; }

.cp-surface .cp-foot {
  margin-top: 0.85rem;
  padding-top: 0.85rem;
  border-top: 1px solid var(--edge);
  font-size: 0.84rem;
  color: var(--paper-muted);
  font-family: var(--font-sans);
  line-height: 1.55;
}

.cp-surface .cp-foot strong { color: var(--aurora); font-weight: 600; }

/* ── Section: What Smriti is ─────────────────────────────────────────────── */

.is-grid {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: 3.5rem;
  align-items: start;
  margin: 2rem 0 0;
}

.is-grid p { color: var(--paper-muted); font-size: 1.02rem; }
.is-grid p code { font-size: 0.9em; }

/* Structured tree visualization — parsed JSON/YAML feel */
.struct-tree {
  background: var(--ink-1);
  border: 1px solid var(--edge);
  border-radius: var(--r-md);
  font-family: var(--font-mono);
  font-size: 0.86rem;
  line-height: 1.75;
  overflow: hidden;
}

.struct-tree .tree-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.6rem 1.1rem;
  background: var(--ink-2);
  border-bottom: 1px solid var(--edge);
  font-size: 0.72rem;
  color: var(--paper-dim);
  letter-spacing: 0.06em;
}

.struct-tree .tree-bar .hash { color: var(--ember); font-family: var(--font-mono); }
.struct-tree .tree-bar .meta { display: flex; gap: 0.85rem; }

.struct-tree .tree-body {
  padding: 1.1rem 1.3rem 1.25rem;
  display: grid;
  gap: 0.45rem;
}

.struct-tree .tline {
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: 1rem;
  align-items: baseline;
  font-size: 0.85rem;
}

.struct-tree .tline .field {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--paper-dim);
  position: relative;
  padding-left: 1rem;
}

.struct-tree .tline .field::before {
  content: "·";
  position: absolute;
  left: 0;
  top: 0;
  color: var(--ember);
  font-weight: 600;
  font-size: 1rem;
  line-height: 1;
}

.struct-tree .tline .val {
  color: var(--paper);
  font-family: var(--font-sans);
  line-height: 1.5;
}

.struct-tree .tline .val .muted { color: var(--paper-muted); }

.struct-tree .tline .val ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.35rem;
}

.struct-tree .tline .val li {
  display: flex;
  gap: 0.55rem;
  align-items: baseline;
  flex-wrap: wrap;
}

.struct-tree .tag {
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.06em;
  padding: 0.12rem 0.45rem;
  border-radius: var(--r-sm);
  text-transform: lowercase;
  white-space: nowrap;
  flex-shrink: 0;
}

.struct-tree .tag.implement   { background: var(--ember-soft);  color: var(--ember); }
.struct-tree .tag.test        { background: var(--indigo-soft); color: var(--indigo); }
.struct-tree .tag.doc         { background: var(--aurora-soft); color: var(--aurora); }
.struct-tree .tag.investigate { background: rgba(216,163,90,0.14); color: #d8a35a; }
.struct-tree .tag.claude      { background: var(--ember-soft);  color: var(--ember); }
.struct-tree .tag.codex       { background: var(--indigo-soft); color: var(--indigo); }

.struct-tree .id-pill {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  color: var(--paper-dim);
  font-style: italic;
}

.struct-tree .repo-line {
  font-family: var(--font-mono);
  font-size: 0.84rem;
  color: var(--paper-muted);
}

.struct-tree .repo-line .ok { color: var(--aurora); }

/* ── Section: Multi-agent coordination — protocol theatre (rebuilt) ──────── */

.theatre {
  margin: 2.5rem 0 0;
  position: relative;
}

.theatre-frame {
  display: grid;
  grid-template-columns: 1fr 280px 1fr;
  gap: 1.5rem;
  align-items: start;
  position: relative;
  min-height: 320px;
}

/* Agent panel */
.agent-panel {
  background: var(--ink-1);
  border: 1px solid var(--edge);
  border-radius: var(--r-md);
  padding: 1.1rem 1.2rem 1.25rem;
  min-height: 280px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: border-color var(--t-base) var(--ease-out),
              box-shadow var(--t-base) var(--ease-out);
}

.agent-panel.claude {
  background-image: linear-gradient(180deg, var(--ember-soft) 0%, transparent 18%);
}

.agent-panel.codex {
  background-image: linear-gradient(180deg, var(--indigo-soft) 0%, transparent 18%);
}

.agent-panel.is-active.claude {
  border-color: var(--ember-line);
  box-shadow: 0 0 0 1px var(--ember-line) inset,
              0 24px 60px -24px var(--ember-glow);
}

.agent-panel.is-active.codex {
  border-color: var(--indigo-line);
  box-shadow: 0 0 0 1px var(--indigo-line) inset,
              0 24px 60px -24px var(--indigo-glow);
}

.agent-panel .panel-head {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding-bottom: 0.9rem;
  border-bottom: 1px solid var(--edge);
  margin-bottom: 0.9rem;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  letter-spacing: -0.005em;
}

.agent-panel.claude .panel-head { color: var(--ember); }
.agent-panel.codex  .panel-head { color: var(--indigo); }

.agent-panel .panel-head .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: currentColor;
  box-shadow: 0 0 0 0 currentColor;
  transition: box-shadow var(--t-base) var(--ease-out);
}

.agent-panel.is-active .panel-head .dot {
  box-shadow: 0 0 0 4px var(--ember-soft);
}
.agent-panel.codex.is-active .panel-head .dot {
  box-shadow: 0 0 0 4px var(--indigo-soft);
}

.agent-panel .panel-head .status {
  margin-left: auto;
  font-size: 0.72rem;
  color: var(--paper-dim);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-weight: 500;
}

.agent-panel .work-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--paper-dim);
  margin-bottom: 0.5rem;
  font-weight: 600;
}

.agent-panel .work-stack {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.5rem;
  min-height: 110px;
  flex: 1;
}

.agent-panel .work-stack:empty::before {
  content: "(no claims yet)";
  color: var(--paper-faint);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-style: italic;
}

/* Pool */
.pool {
  background: var(--ink-1);
  border: 1px solid var(--edge);
  border-radius: var(--r-md);
  padding: 1.1rem 1rem;
  min-height: 280px;
  position: relative;
  display: flex;
  flex-direction: column;
}

.pool::before, .pool::after {
  content: "";
  position: absolute;
  left: -1.5rem;
  right: -1.5rem;
  height: 1px;
  background: linear-gradient(90deg,
              transparent, var(--edge), var(--edge), var(--edge), transparent);
  pointer-events: none;
}

.pool::before { top: 50%; transform: translateY(-50%); opacity: 0.25; }
.pool::after  { display: none; }

.pool .pool-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--paper-dim);
  text-align: center;
  margin-bottom: 0.9rem;
  font-weight: 600;
}

.pool .pool-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.55rem;
  flex: 1;
}

/* Task packet — the unit of work that flies into agent panels */
.packet {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.55rem 0.75rem;
  background: var(--ink-2);
  border: 1px solid var(--edge-strong);
  border-radius: var(--r-md);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--paper);
  cursor: pointer;
  transition: transform var(--t-fast) var(--ease-out),
              border-color var(--t-fast) var(--ease-out),
              background var(--t-base) var(--ease-out),
              opacity var(--t-base) var(--ease-out);
  position: relative;
}

.packet:hover {
  transform: translateY(-1px);
  border-color: var(--paper-dim);
}

.packet .intent {
  font-size: 0.64rem;
  letter-spacing: 0.06em;
  padding: 0.12rem 0.42rem;
  border-radius: var(--r-sm);
  text-transform: lowercase;
  flex-shrink: 0;
  font-weight: 600;
}

.packet .intent.implement   { background: var(--ember-soft);  color: var(--ember); }
.packet .intent.test        { background: var(--indigo-soft); color: var(--indigo); }
.packet .intent.doc         { background: var(--aurora-soft); color: var(--aurora); }
.packet .intent.investigate { background: rgba(216,163,90,0.14); color: #d8a35a; }

.packet .name {
  flex: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-size: 0.8rem;
}

.packet .pid {
  font-size: 0.7rem;
  color: var(--paper-dim);
  flex-shrink: 0;
}

.packet.dimmed {
  opacity: 0.4;
  pointer-events: none;
}

.packet.claimed-claude {
  border-color: var(--ember-line);
  background: linear-gradient(180deg, var(--ember-soft), transparent);
  color: var(--ember-2);
}

.packet.claimed-codex {
  border-color: var(--indigo-line);
  background: linear-gradient(180deg, var(--indigo-soft), transparent);
  color: var(--indigo-2);
}

/* Flying packet — overlays absolute on top of the theatre while transitioning */
.packet-flying {
  position: absolute;
  pointer-events: none;
  z-index: 5;
  transition: transform var(--t-flow) var(--ease-spring),
              opacity var(--t-flow) var(--ease-out);
  will-change: transform, opacity;
}

/* Theatre controls */
.theatre-controls {
  margin-top: 1.25rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1.25rem;
  flex-wrap: wrap;
  padding: 1.1rem 1.4rem;
  background: var(--ink-1);
  border: 1px solid var(--edge);
  border-radius: var(--r-md);
}

.theatre-controls .step-text {
  color: var(--paper);
  font-size: 0.97rem;
  flex: 1;
  min-height: 1.4em;
  transition: opacity var(--t-base) var(--ease-out);
}

.theatre-controls .step-text .muted { color: var(--paper-muted); }

.theatre-controls .controls-right {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.theatre-controls .step-counter {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--paper-dim);
  letter-spacing: 0.06em;
}

.theatre-hint {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  color: var(--paper-dim);
  margin-top: 0.9rem;
  text-align: center;
  letter-spacing: 0.04em;
}

.theatre-hint .key {
  display: inline-block;
  padding: 0.1rem 0.4rem;
  background: var(--ink-2);
  border: 1px solid var(--edge-strong);
  border-radius: var(--r-sm);
  color: var(--paper-muted);
  margin: 0 0.15rem;
}

/* ── Section: Drift ──────────────────────────────────────────────────────── */

.drift-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  margin: 2.5rem 0 0;
  align-items: stretch;
}

.drift-canvas {
  background: var(--ink-1);
  border: 1px solid var(--edge);
  border-radius: var(--r-md);
  padding: 2.2rem 1.5rem 1.5rem;
  display: flex;
  flex-direction: column;
  justify-content: center;
  position: relative;
  min-height: 240px;
  overflow: hidden;
}

.drift-canvas .canvas-label {
  position: absolute;
  top: 0.9rem;
  left: 1.2rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--paper-dim);
  font-weight: 600;
}

.drift-canvas svg { width: 100%; height: auto; overflow: visible; }

.drift-canvas .timeline {
  stroke: var(--paper-faint);
  stroke-width: 1;
  stroke-dasharray: 2 4;
}

.drift-canvas .stone-base {
  fill: var(--ink-2);
  stroke: var(--ember);
  stroke-width: 1.5;
  filter: drop-shadow(0 0 6px var(--ember-glow));
}

.drift-canvas .stone-head {
  fill: var(--ink-2);
  stroke: var(--paper-muted);
  stroke-width: 1.5;
  transition: transform var(--t-flow) var(--ease-spring),
              stroke var(--t-base) var(--ease-out),
              filter var(--t-base) var(--ease-out);
  transform-origin: center;
  transform-box: fill-box;
}

.drift-canvas.is-drifted .stone-head {
  stroke: #d8a35a;
  filter: drop-shadow(0 0 8px rgba(216,163,90,0.42));
  transform: translateX(14px);
}

.drift-canvas .commit-dot {
  fill: var(--paper-faint);
  transition: fill var(--t-base) var(--ease-out);
}

.drift-canvas.is-drifted .commit-dot { fill: var(--paper-muted); }

.drift-canvas .braid-taut {
  fill: none;
  stroke-width: 1.4;
}

.drift-canvas .braid-taut.a { stroke: var(--ember); opacity: 0.85; }
.drift-canvas .braid-taut.b { stroke: var(--indigo); opacity: 0.85; }

.drift-canvas .drift-badge {
  opacity: 0;
  transition: opacity var(--t-slow) var(--ease-out) 300ms;
}

.drift-canvas.is-drifted .drift-badge { opacity: 1; }

.drift-canvas text {
  font-family: var(--font-mono);
}

.drift-state {
  background: var(--ink-1);
  border: 1px solid var(--edge);
  border-radius: var(--r-md);
  padding: 1.3rem 1.5rem 1.4rem;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  line-height: 1.75;
  background-image:
    linear-gradient(180deg, transparent 0, transparent calc(1.75em - 1px), var(--edge) calc(1.75em - 1px), var(--edge) 1.75em, transparent 1.75em);
  background-size: 100% 1.75em;
  background-position: 0 1.75rem;
}

.drift-state .ds-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.9rem;
  font-size: 0.72rem;
  color: var(--paper-dim);
  letter-spacing: 0.05em;
}

.drift-state .ds-bar .filename { color: var(--paper-muted); }

.drift-state .h { color: var(--paper); font-weight: 600; display: block; margin-bottom: 0.2rem; }
.drift-state .ln { display: block; color: var(--paper-muted); }
.drift-state .ln .k { color: var(--paper); }
.drift-state .ln .ok { color: var(--aurora); }
.drift-state .ln .warn { color: #d8a35a; }
.drift-state .ln .ahead { color: #d8a35a; font-weight: 600; }
.drift-state .ln.action { color: #d8a35a; margin-top: 0.4rem; }

/* ── Section: Built with Smriti ──────────────────────────────────────────── */

.terminal {
  margin: 2.5rem 0 0;
  background: var(--ink-1);
  border: 1px solid var(--edge);
  border-radius: var(--r-md);
  overflow: hidden;
  box-shadow: 0 24px 60px -28px rgba(0,0,0,0.6),
              0 0 0 1px var(--edge) inset;
}

.terminal .term-bar {
  display: flex;
  align-items: center;
  padding: 0.55rem 1rem;
  background: var(--ink-2);
  border-bottom: 1px solid var(--edge);
  font-family: var(--font-mono);
  font-size: 0.74rem;
  color: var(--paper-dim);
  letter-spacing: 0.05em;
}

.terminal .term-bar .dots {
  display: inline-flex;
  gap: 5px;
  margin-right: 0.85rem;
}

.terminal .term-bar .dots span {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--paper-faint);
}

.terminal .term-bar .dots span:nth-child(1) { background: #d97a72; }
.terminal .term-bar .dots span:nth-child(2) { background: #d8a35a; }
.terminal .term-bar .dots span:nth-child(3) { background: var(--aurora); }

.terminal .term-bar .title { margin-right: auto; }
.terminal .term-bar .space-tag { color: var(--ember); font-family: var(--font-mono); }

.terminal .term-body {
  padding: 1.3rem 1.5rem 1.5rem;
  font-family: var(--font-mono);
  font-size: 0.88rem;
  line-height: 1.8;
}

.terminal .cmd { color: var(--paper); }
.terminal .cmd .pr { color: var(--paper-dim); margin-right: 0.5rem; }
.terminal .cmd .verb { color: var(--ember); }
.terminal .cmd .arg { color: var(--paper); }
.terminal .caret {
  display: inline-block;
  width: 8px;
  height: 1em;
  background: var(--ember);
  vertical-align: text-bottom;
  margin-left: 4px;
  animation: caret-blink 1.1s steps(2) infinite;
}

.terminal .out-h {
  color: var(--paper);
  font-weight: 600;
  margin-top: 0.9rem;
}

.terminal .out-sec {
  color: var(--paper-dim);
  font-size: 0.74rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-top: 1.1rem;
  margin-bottom: 0.2rem;
  font-weight: 600;
}

.terminal .out {
  color: var(--paper-muted);
  font-family: var(--font-mono);
}

.terminal .out .n  { color: var(--ember); font-weight: 600; }
.terminal .out .ni { color: var(--indigo); font-weight: 600; }
.terminal .out .na { color: var(--aurora); font-weight: 600; }
.terminal .out .agent-c { color: var(--ember); }
.terminal .out .agent-x { color: var(--indigo); }
.terminal .out .highlight {
  position: relative;
}
.terminal .out .highlight::after {
  content: "";
  position: absolute;
  left: 0; right: 0;
  bottom: -2px;
  height: 2px;
  background: var(--ember);
  transform-origin: left;
  transform: scaleX(0);
  transition: transform var(--t-slow) var(--ease-out) 200ms;
}

.terminal.is-revealed .out .highlight::after { transform: scaleX(1); }

.built-note {
  margin-top: 1.75rem;
  font-size: 0.95rem;
  color: var(--paper-muted);
  text-align: center;
  max-width: 660px;
  margin-left: auto;
  margin-right: auto;
  line-height: 1.6;
}

.built-note em { color: var(--paper); font-style: normal; font-weight: 500; }

/* ── Section: Try it ─────────────────────────────────────────────────────── */

.try-stack {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  margin: 2.5rem 0 0;
  position: relative;
}

.try-term {
  background: var(--ink-1);
  border: 1px solid var(--edge);
  border-radius: var(--r-md);
  overflow: hidden;
  position: relative;
  transition: transform var(--t-base) var(--ease-out);
}

.try-term:nth-child(1) { transform: rotate(-0.4deg) translateY(2px); }
.try-term:nth-child(2) { transform: rotate(0.4deg);  }

.try-term:hover { transform: rotate(0) translateY(-2px); }

.try-term .tt-bar {
  display: flex;
  align-items: center;
  padding: 0.55rem 1rem;
  background: var(--ink-2);
  border-bottom: 1px solid var(--edge);
  font-family: var(--font-mono);
  font-size: 0.74rem;
  color: var(--paper-dim);
}

.try-term .tt-bar .ix {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--ember);
  margin-right: 0.6rem;
  letter-spacing: 0.08em;
}

.try-term .tt-bar h3 {
  margin: 0;
  font-size: 0.85rem;
  color: var(--paper);
  font-weight: 600;
  font-family: var(--font-sans);
}

.try-term .tt-bar .marker {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--paper-dim);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.try-term .tt-body {
  padding: 1.2rem 1.3rem 1.35rem;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  line-height: 1.75;
  color: var(--paper);
}

.try-term .tt-body pre {
  margin: 0;
  background: transparent;
  border: none;
  padding: 0;
  font-size: 0.85rem;
}

.try-term .tt-body .verb { color: var(--ember); }
.try-term .tt-body .arg { color: var(--paper); }
.try-term .tt-body .note { color: var(--paper-dim); font-style: italic; }

.try-term .tt-body .note-block {
  font-family: var(--font-sans);
  font-size: 0.85rem;
  color: var(--paper-muted);
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--edge);
  line-height: 1.55;
}

.try-foot {
  margin-top: 1.75rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
  font-size: 0.92rem;
  color: var(--paper-muted);
}

.try-foot .reqs {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--paper-dim);
}

/* ── CTA + footer ────────────────────────────────────────────────────────── */

.cta {
  text-align: center;
  padding: 7rem 0 6rem;
}

.cta h2 {
  font-size: clamp(1.95rem, 3.8vw, 2.7rem);
  margin-bottom: 1.25rem;
  font-weight: 600;
  letter-spacing: -0.025em;
}

.cta h2 .accent { color: var(--ember); }

.cta p {
  color: var(--paper-muted);
  max-width: 540px;
  margin: 0 auto 2.25rem;
  font-size: 1.05rem;
}

.cta-buttons {
  display: flex;
  gap: 0.75rem;
  justify-content: center;
  flex-wrap: wrap;
}

.site-footer {
  border-top: 1px solid var(--edge);
  padding: 2.5rem 0 3rem;
  font-size: 0.85rem;
  color: var(--paper-dim);
}

.site-footer .footer-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.site-footer p { margin: 0; }
.site-footer a { color: var(--paper-muted); }
.site-footer a:hover { color: var(--paper); }

.site-footer .footer-meta {
  display: flex;
  gap: 1.5rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--paper-dim);
}

/* ── Reveal-on-scroll ───────────────────────────────────────────────────── */

.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.85s var(--ease-out), transform 0.85s var(--ease-out);
}

.reveal.in { opacity: 1; transform: translateY(0); }

.reveal-stagger > * {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.7s var(--ease-out), transform 0.7s var(--ease-out);
}

.reveal-stagger.in > * { opacity: 1; transform: translateY(0); }
.reveal-stagger.in > *:nth-child(1) { transition-delay:  60ms; }
.reveal-stagger.in > *:nth-child(2) { transition-delay: 120ms; }
.reveal-stagger.in > *:nth-child(3) { transition-delay: 180ms; }
.reveal-stagger.in > *:nth-child(4) { transition-delay: 240ms; }
.reveal-stagger.in > *:nth-child(5) { transition-delay: 300ms; }
.reveal-stagger.in > *:nth-child(6) { transition-delay: 360ms; }
.reveal-stagger.in > *:nth-child(7) { transition-delay: 420ms; }
.reveal-stagger.in > *:nth-child(8) { transition-delay: 480ms; }

/* SVG path draw-in */
.draw-path {
  stroke-dasharray: 2000;
  stroke-dashoffset: 2000;
  transition: stroke-dashoffset 1.6s var(--ease-out);
}

.in .draw-path,
.reveal.in .draw-path { stroke-dashoffset: 0; }

/* ── Responsive ──────────────────────────────────────────────────────────── */

@media (max-width: 980px) {
  .section { padding: 5rem 0; }
  .hero { padding: 4.5rem 0 3.5rem; }
  .hero-grid { grid-template-columns: 1fr; gap: 2.5rem; }
  .hero-braid { margin-left: 0; max-width: 100%; }

  .is-grid { grid-template-columns: 1fr; gap: 2.5rem; }
  .collapse-pair { grid-template-columns: 1fr; }
  .drift-grid { grid-template-columns: 1fr; }
  .try-stack { grid-template-columns: 1fr; }

  .theatre-frame { grid-template-columns: 1fr; gap: 1rem; }
  .agent-panel { min-height: 200px; }
  .pool { min-height: 200px; }
}

@media (max-width: 720px) {
  body { font-size: 16px; }
  .section { padding: 3.5rem 0; }
  .cta { padding: 4.5rem 0 4rem; }

  .hero { padding: 3rem 0 2rem; }
  .hero-sub { font-size: 1.02rem; }

  .container { padding: 0 1.25rem; }

  .site-header nav { gap: 0.75rem; font-size: 0.86rem; }
  .site-header nav a:not(.nav-cta) { display: none; }
  .site-header nav .nav-cta { padding: 0.4rem 0.8rem; }

  .glossary .gloss-header,
  .glossary .gloss-row { grid-template-columns: 1fr; gap: 0.35rem; }
  .glossary .gloss-row { padding: 1rem 0; }
  .glossary .gloss-row .git-term { font-size: 0.82rem; color: var(--paper-dim); }

  .struct-tree .tline { grid-template-columns: 1fr; gap: 0.2rem; }

  .terminal .term-body { padding: 1rem 1.1rem 1.2rem; font-size: 0.82rem; }

  .try-term:nth-child(1),
  .try-term:nth-child(2) { transform: none; }

  .footer-row { flex-direction: column; align-items: flex-start; gap: 1rem; }
}

@media (max-width: 420px) {
  .hero-cta { flex-direction: column; align-items: stretch; }
  .hero-cta .btn { justify-content: center; }
}

/* ── Reduced motion ──────────────────────────────────────────────────────── */

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
  html { scroll-behavior: auto; }
  .reveal, .reveal-stagger > * { opacity: 1; transform: none; }
  .draw-path { stroke-dashoffset: 0; }
  .braid .sway { animation: none; transform: none; }
  .braid .stone-pulse { display: none; }
  .brand-mark .pulse { display: none; }
  .terminal .caret, .md-surface .typing-caret { animation: none; opacity: 0.6; }
}