/* ============================================================================
   tachi-agent docs — "Terminal-brutalism × Japanese vermilion (朱)"
   One shared stylesheet. No build step, no frameworks.
   ============================================================================ */

:root {
  --bg: #0B0B0C;
  --bg-elev: #141417;
  --ink: #ECE7DE;
  --muted: #8A8F98;
  --accent: #E4572E;        /* 朱 vermilion — dominant accent */
  --accent-dim: #b8451f;
  --gold: #F2C14E;          /* warm gold — sparingly */
  --line: rgba(236, 231, 222, .14);
  --line-strong: rgba(236, 231, 222, .28);
  --maxw: 1180px;

  --font-display: "Syne", "Trebuchet MS", sans-serif;
  --font-body: "Spectral", Georgia, "Times New Roman", serif;
  --font-mono: "JetBrains Mono", "SF Mono", ui-monospace, Menlo, monospace;

  --ease: cubic-bezier(.22, 1, .36, 1);
}

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

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 18px;
  line-height: 1.7;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

/* ---------- film-grain overlay (fixed, full screen) ---------- */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 9999;
  pointer-events: none;
  opacity: .04;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='160' height='160'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/></filter><rect width='100%25' height='100%25' filter='url(%23n)'/></svg>");
  background-size: 160px 160px;
}

/* ---------- thick top border bar ---------- */
body::after {
  content: "";
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--accent);
  z-index: 1001;
}

/* ---------- links ---------- */
a { color: var(--accent); text-decoration: none; transition: color .2s var(--ease); }
a:hover { color: var(--gold); }

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

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

/* ---------- layout primitives ---------- */
.wrap {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 28px;
}

.section { padding: 96px 0; position: relative; }
.section + .section { border-top: 2px solid var(--accent); }

/* scroll-reveal */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity .7s var(--ease), transform .7s var(--ease);
}
.reveal.in { opacity: 1; transform: none; }

/* ============================================================================
   NAV
   ============================================================================ */
.nav {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(11, 11, 12, .82);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.nav-inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 16px 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.wordmark {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1rem;
  letter-spacing: .02em;
  color: var(--ink);
  white-space: nowrap;
  display: inline-flex;
  align-items: baseline;
  gap: .5ch;
}
.wordmark .kanji {
  font-family: var(--font-display);
  color: var(--accent);
  font-size: 1.3rem;
  font-weight: 800;
}
.wordmark:hover { color: var(--ink); }
.wordmark:hover .kanji { color: var(--gold); }

.nav-links {
  display: flex;
  align-items: center;
  gap: 26px;
  list-style: none;
  margin: 0;
  padding: 0;
}
.nav-links a {
  font-family: var(--font-mono);
  font-size: .82rem;
  font-weight: 500;
  letter-spacing: .03em;
  color: var(--muted);
  padding: 4px 0;
  position: relative;
  white-space: nowrap;
}
.nav-links a:hover { color: var(--ink); }
.nav-links a.active { color: var(--ink); }
.nav-links a.active::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -2px;
  height: 2px;
  background: var(--accent);
}
.nav-cta { color: var(--accent) !important; }

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--line-strong);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 1.1rem;
  width: 42px;
  height: 38px;
  cursor: pointer;
  line-height: 1;
}

/* ============================================================================
   HERO
   ============================================================================ */
.hero {
  position: relative;
  padding: 92px 0 80px;
  overflow: hidden;
}
/* scanlines — hero only */
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: repeating-linear-gradient(
    to bottom,
    rgba(236, 231, 222, .035) 0,
    rgba(236, 231, 222, .035) 1px,
    transparent 1px,
    transparent 4px
  );
  z-index: 0;
}
/* diagonal vermilion accent slash */
.hero::after {
  content: "";
  position: absolute;
  top: -120px;
  right: -160px;
  width: 520px;
  height: 1100px;
  background: var(--accent);
  opacity: .12;
  transform: rotate(18deg);
  pointer-events: none;
  z-index: 0;
}
.hero .wrap { position: relative; z-index: 1; }

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr .85fr;
  gap: 56px;
  align-items: start;
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: .8rem;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 20px;
}
.eyebrow .dim { color: var(--muted); }

.hero-wordmark {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2.4rem, 6vw, 4.4rem);
  line-height: 1;
  letter-spacing: -.02em;
  margin: 0 0 6px;
  display: flex;
  align-items: baseline;
  gap: .35ch;
  flex-wrap: wrap;
}
.hero-wordmark .kanji { color: var(--accent); }

.hero h1 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.9rem, 4.4vw, 3.1rem);
  line-height: 1.05;
  letter-spacing: -.015em;
  margin: 18px 0 0;
  max-width: 14ch;
}
.hero h1 .accent { color: var(--accent); }

.hero-sub {
  font-size: 1.15rem;
  color: var(--ink);
  line-height: 1.65;
  margin: 26px 0 0;
  max-width: 52ch;
}
.hero-sub strong { color: var(--accent); font-weight: 600; }
.hero-sub em { color: var(--gold); font-style: italic; }

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 34px;
}

.btn {
  font-family: var(--font-mono);
  font-size: .85rem;
  font-weight: 500;
  letter-spacing: .02em;
  padding: 13px 22px;
  border: 1.5px solid var(--line-strong);
  color: var(--ink);
  background: transparent;
  cursor: pointer;
  transition: all .22s var(--ease);
  display: inline-flex;
  align-items: center;
  gap: .6ch;
}
.btn:hover {
  border-color: var(--accent);
  color: var(--ink);
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(228, 87, 46, .18);
}
.btn-primary {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--bg);
  font-weight: 700;
}
.btn-primary:hover {
  background: var(--accent);
  color: var(--bg);
  box-shadow: 0 8px 34px rgba(228, 87, 46, .42);
}

/* hero staggered reveal */
.hero-anim {
  opacity: 0;
  transform: translateY(22px);
  animation: heroRise .8s var(--ease) forwards;
}
.hero-anim.d1 { animation-delay: .05s; }
.hero-anim.d2 { animation-delay: .22s; }
.hero-anim.d3 { animation-delay: .4s; }
.hero-anim.d4 { animation-delay: .58s; }
.hero-anim.d5 { animation-delay: .76s; }
@keyframes heroRise {
  to { opacity: 1; transform: none; }
}

/* ============================================================================
   TERMINAL
   ============================================================================ */
.terminal {
  background: var(--bg-elev);
  border: 1px solid var(--line-strong);
  font-family: var(--font-mono);
  font-size: .82rem;
  line-height: 1.7;
  box-shadow: 0 24px 60px rgba(0, 0, 0, .5);
  position: relative;
}
.term-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 11px 14px;
  border-bottom: 1px solid var(--line);
  background: rgba(0, 0, 0, .25);
}
.term-dot {
  width: 11px; height: 11px;
  border-radius: 50%;
  background: var(--line-strong);
}
.term-dot.red { background: var(--accent); }
.term-bar .term-title {
  margin-left: auto;
  color: var(--muted);
  font-size: .72rem;
  letter-spacing: .05em;
}
.term-body {
  padding: 18px 18px 22px;
  min-height: 230px;
  white-space: pre-wrap;
  word-break: break-word;
  color: var(--ink);
}
.term-body .prompt { color: var(--accent); }
.term-body .cmd { color: var(--ink); }
.term-body .step { color: var(--muted); }
.term-body .tool { color: var(--gold); }
.term-body .ok { color: #6fcf97; }
.term-body .ans { color: var(--ink); display: block; margin-top: 6px; }
.term-body .label-err { color: var(--muted); font-style: italic; }

.cursor {
  display: inline-block;
  width: .55ch;
  color: var(--accent);
  animation: blink 1.05s steps(1) infinite;
}
@keyframes blink { 50% { opacity: 0; } }

/* ============================================================================
   SECTION HEADERS w/ oversized outline numerals
   ============================================================================ */
.sec-head {
  position: relative;
  margin-bottom: 44px;
}
.sec-kicker {
  font-family: var(--font-mono);
  font-size: .8rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--accent);
  display: block;
  margin-bottom: 14px;
}
.sec-kicker .box { color: var(--muted); }
.sec-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  line-height: 1.05;
  letter-spacing: -.015em;
  margin: 0;
  max-width: 22ch;
}
.sec-lead {
  font-size: 1.12rem;
  color: var(--muted);
  max-width: 60ch;
  margin: 18px 0 0;
}
.sec-lead strong { color: var(--ink); font-weight: 600; }

.numeral {
  position: absolute;
  top: -54px;
  right: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(6rem, 16vw, 11rem);
  line-height: 1;
  color: transparent;
  -webkit-text-stroke: 1px var(--line);
  pointer-events: none;
  z-index: 0;
  user-select: none;
}

/* ============================================================================
   CARDS (the seams)
   ============================================================================ */
.cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}
.card {
  background: var(--bg-elev);
  border: 1px solid var(--line);
  padding: 30px 26px 32px;
  position: relative;
  transition: transform .26s var(--ease), border-color .26s var(--ease), box-shadow .26s var(--ease);
  overflow: hidden;
}
.card::before {
  content: attr(data-num);
  position: absolute;
  top: 14px;
  right: 18px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 3.4rem;
  line-height: 1;
  color: transparent;
  -webkit-text-stroke: 1px var(--line);
  pointer-events: none;
}
.card:hover {
  transform: translateY(-6px);
  border-color: var(--accent);
  box-shadow: 0 18px 44px rgba(228, 87, 46, .16);
}
.card h3 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.4rem;
  margin: 0 0 6px;
  letter-spacing: -.01em;
}
.card .card-tag {
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .06em;
  text-transform: uppercase;
  color: var(--accent);
  display: block;
  margin-bottom: 14px;
}
.card p { margin: 0; color: var(--muted); font-size: .98rem; line-height: 1.6; }
.card p code,
.card p strong { color: var(--ink); }
.card code {
  font-family: var(--font-mono);
  font-size: .85em;
  color: var(--gold);
  background: rgba(0, 0, 0, .3);
  padding: 1px 5px;
}
.cards-tagline {
  font-family: var(--font-body);
  font-style: italic;
  font-size: 1.15rem;
  color: var(--ink);
  margin: 36px 0 0;
  text-align: center;
}

/* ============================================================================
   PROSE blocks
   ============================================================================ */
.prose p { color: var(--ink); margin: 0 0 18px; max-width: 66ch; }
.prose p.lede { font-size: 1.2rem; }
.prose strong { color: var(--accent); font-weight: 600; }
.prose em { color: var(--gold); }
.prose code {
  font-family: var(--font-mono);
  font-size: .86em;
  color: var(--gold);
  background: rgba(0, 0, 0, .3);
  padding: 1px 5px;
  border: 1px solid var(--line);
}
.prose ul { padding-left: 0; list-style: none; margin: 0 0 18px; max-width: 70ch; }
.prose ul li {
  position: relative;
  padding-left: 26px;
  margin-bottom: 14px;
  color: var(--ink);
}
.prose ul li::before {
  content: "▍";
  position: absolute;
  left: 0;
  color: var(--accent);
}
.prose ul li strong { color: var(--accent); }

/* ============================================================================
   CODE BLOCKS w/ copy button
   ============================================================================ */
.code {
  position: relative;
  background: var(--bg-elev);
  border: 1px solid var(--line-strong);
  margin: 0 0 22px;
}
.code-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 9px 14px;
  border-bottom: 1px solid var(--line);
  background: rgba(0, 0, 0, .25);
}
.code-head .code-label {
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .06em;
  text-transform: uppercase;
  color: var(--muted);
}
.copy-btn {
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .05em;
  text-transform: uppercase;
  color: var(--muted);
  background: transparent;
  border: 1px solid var(--line);
  padding: 4px 10px;
  cursor: pointer;
  transition: all .18s var(--ease);
}
.copy-btn:hover { color: var(--accent); border-color: var(--accent); }
.copy-btn.copied { color: var(--gold); border-color: var(--gold); }
.code pre {
  margin: 0;
  padding: 18px;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: .84rem;
  line-height: 1.65;
  color: var(--ink);
}
.code pre .c { color: var(--muted); font-style: italic; }   /* comment */
.code pre .k { color: var(--accent); }                       /* keyword */
.code pre .s { color: var(--gold); }                         /* string */
.code pre .fn { color: var(--ink); }

/* ============================================================================
   TABLES
   ============================================================================ */
.table-wrap { overflow-x: auto; border: 1px solid var(--line); }
table {
  width: 100%;
  border-collapse: collapse;
  font-size: .92rem;
  min-width: 560px;
}
thead th {
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--accent);
  text-align: left;
  padding: 14px 18px;
  background: var(--bg-elev);
  border-bottom: 2px solid var(--accent);
}
tbody td {
  padding: 14px 18px;
  border-bottom: 1px solid var(--line);
  color: var(--ink);
  vertical-align: top;
}
tbody tr:last-child td { border-bottom: none; }
tbody tr:hover td { background: rgba(228, 87, 46, .05); }
td code, th code {
  font-family: var(--font-mono);
  font-size: .85em;
  color: var(--gold);
  background: rgba(0, 0, 0, .3);
  padding: 1px 5px;
}
td strong { color: var(--accent); }

/* ============================================================================
   ROADMAP timeline
   ============================================================================ */
.timeline {
  position: relative;
  margin: 0;
  padding: 0 0 0 36px;
  list-style: none;
  border-left: 2px solid var(--line-strong);
}
.timeline li {
  position: relative;
  padding: 0 0 36px 8px;
}
.timeline li:last-child { padding-bottom: 0; }
.timeline li::before {
  content: "";
  position: absolute;
  left: -45px;
  top: 4px;
  width: 14px;
  height: 14px;
  background: var(--bg);
  border: 2px solid var(--accent);
  border-radius: 50%;
}
.timeline li.done::before { background: var(--accent); }
.timeline li.new::before {
  background: var(--gold);
  border-color: var(--gold);
  box-shadow: 0 0 0 5px rgba(242, 193, 78, .18);
}
.timeline .tl-tag {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: .9rem;
  letter-spacing: .04em;
  color: var(--accent);
}
.timeline li.new .tl-tag { color: var(--gold); }
.timeline .tl-state {
  font-family: var(--font-mono);
  font-size: .72rem;
  color: var(--muted);
  margin-left: 6px;
}
.timeline h4 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.25rem;
  margin: 4px 0 6px;
}
.timeline p { color: var(--muted); margin: 0; font-size: .98rem; max-width: 64ch; }
.timeline a { font-family: var(--font-mono); font-size: .82rem; }

/* ============================================================================
   DIAGRAM wrappers
   ============================================================================ */
.diagram {
  background: var(--bg-elev);
  border: 1px solid var(--line);
  padding: 28px;
  overflow-x: auto;
  /* faint vermilion blueprint grid under the artwork */
  background-image:
    linear-gradient(rgba(228, 87, 46, .035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(228, 87, 46, .035) 1px, transparent 1px);
  background-size: 36px 36px, 36px 36px;
}
.diagram svg { display: block; margin: 0 auto; max-width: 100%; height: auto; }

/* svg theme tokens used inline */
.svg-node { fill: var(--bg); stroke: var(--line-strong); }
.svg-node-accent { fill: rgba(228, 87, 46, .12); stroke: var(--accent); }
.svg-label { fill: var(--ink); font-family: var(--font-mono); }
.svg-label-mono { fill: var(--muted); font-family: var(--font-mono); }
.svg-edge { stroke: var(--line-strong); }
.svg-edge-accent { stroke: var(--accent); }

.pulse { animation: pulse 2.4s ease-in-out infinite; transform-box: fill-box; transform-origin: center; }
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: .55; }
}

/* ----------------------------------------------------------------------------
   "nice graphs" — refined diagram primitives (scoped .diagram-*)
   ---------------------------------------------------------------------------- */

/* node depth + finish */
.diagram-svg .d-node {
  fill: var(--bg-elev);
  stroke: var(--line-strong);
  stroke-width: 1;
}
.diagram-svg .d-node-accent {
  fill: rgba(228, 87, 46, .10);
  stroke: var(--accent);
  stroke-width: 1.5;
}
.diagram-svg .d-node-gold {
  fill: rgba(242, 193, 78, .08);
  stroke: var(--gold);
  stroke-width: 1.5;
}
/* small mono chips (front-ends) */
.diagram-svg .d-chip {
  fill: var(--bg);
  stroke: var(--line-strong);
  stroke-width: 1;
}

/* typography inside diagrams */
.diagram-svg .d-title { fill: var(--ink); font-family: var(--font-mono); font-weight: 700; }
.diagram-svg .d-text  { fill: var(--ink); font-family: var(--font-mono); }
.diagram-svg .d-mono  { fill: var(--muted); font-family: var(--font-mono); }
.diagram-svg .d-accent { fill: var(--accent); font-family: var(--font-mono); }
.diagram-svg .d-gold  { fill: var(--gold); font-family: var(--font-mono); }

/* edges */
.diagram-svg .d-edge { stroke: var(--line-strong); fill: none; }
.diagram-svg .d-edge-accent { stroke: var(--accent); fill: none; }
.diagram-svg .d-edge-gold { stroke: var(--gold); fill: none; }
.diagram-svg .d-edge-dim { stroke: rgba(236, 231, 222, .22); fill: none; }

/* panel framing for side-by-side compare */
.diagram-svg .d-panel {
  fill: rgba(255, 255, 255, .015);
  stroke: var(--line);
  stroke-width: 1;
}
.diagram-svg .d-panel-accent {
  fill: rgba(228, 87, 46, .04);
  stroke: rgba(228, 87, 46, .45);
  stroke-width: 1;
}

/* gentle pulse on a key node (uses existing .pulse keyframes) */
.diagram-svg .d-pulse {
  animation: pulse 2.4s ease-in-out infinite;
  transform-box: fill-box;
  transform-origin: center;
}

/* halo behind the key node */
.diagram-svg .d-halo {
  fill: none;
  stroke: var(--accent);
  stroke-width: 1;
  opacity: 0;
  transform-box: fill-box;
  transform-origin: center;
}

/* draw-on-scroll: edges/strokes start hidden, draw in when section reveals.
   Hooks the EXISTING IntersectionObserver — it adds `.in` to the parent
   `.reveal`, which is the trigger here. No competing observer. */
.diagram-svg .d-draw {
  stroke-dasharray: var(--d-len, 600);
  stroke-dashoffset: var(--d-len, 600);
}
.reveal.in .diagram-svg .d-draw {
  animation: dDraw 1.05s var(--ease) forwards;
  animation-delay: var(--d-delay, 0s);
}
@keyframes dDraw { to { stroke-dashoffset: 0; } }

/* nodes/labels fade+rise after their edge draws */
.diagram-svg .d-fade { opacity: 0; }
.reveal.in .diagram-svg .d-fade {
  animation: dFade .55s var(--ease) forwards;
  animation-delay: var(--d-delay, 0s);
}
@keyframes dFade { to { opacity: 1; } }

/* key-node halo wakes up once the diagram is in view */
.reveal.in .diagram-svg .d-halo {
  animation: dHalo 2.8s ease-in-out 1.1s infinite;
}
@keyframes dHalo {
  0%, 100% { opacity: 0; transform: scale(1); }
  50% { opacity: .35; transform: scale(1.06); }
}

/* small caption strip under a diagram */
.diagram-caption {
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing: .04em;
  color: var(--muted);
  text-align: center;
  margin: 16px 0 0;
}
.diagram-caption .hot { color: var(--accent); }
.diagram-caption .warm { color: var(--gold); }

/* REDUCED MOTION: show the final, fully-drawn state, no animation.
   (The global reduced-motion rule already kills animation/transition;
   these reset the initial hidden states so nothing stays invisible.) */
@media (prefers-reduced-motion: reduce) {
  .diagram-svg .d-draw { stroke-dashoffset: 0 !important; }
  .diagram-svg .d-fade { opacity: 1 !important; }
  .diagram-svg .d-halo { opacity: .22 !important; }
}

/* ============================================================================
   FOOTER
   ============================================================================ */
.footer {
  border-top: 2px solid var(--accent);
  padding: 48px 0 60px;
}
.footer-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 22px;
}
.footer .footer-meta {
  font-family: var(--font-mono);
  font-size: .82rem;
  letter-spacing: .04em;
  color: var(--muted);
}
.footer .footer-meta span { color: var(--accent); }
.footer .footer-links {
  display: flex;
  gap: 22px;
  font-family: var(--font-mono);
  font-size: .82rem;
}
.footer .footer-links a { color: var(--muted); }
.footer .footer-links a:hover { color: var(--accent); }
.footer .footer-mark {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.7rem;
  color: var(--accent);
}

/* ============================================================================
   misc utilities
   ============================================================================ */
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; }
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; }
.mt-0 { margin-top: 0; }
.center { text-align: center; }
kbd {
  font-family: var(--font-mono);
  font-size: .8em;
  background: var(--bg-elev);
  border: 1px solid var(--line-strong);
  border-bottom-width: 2px;
  padding: 1px 7px;
  color: var(--ink);
}

/* ============================================================================
   RESPONSIVE
   ============================================================================ */
@media (max-width: 920px) {
  body { font-size: 17px; }
  .hero-grid { grid-template-columns: 1fr; gap: 40px; }
  .split { grid-template-columns: 1fr; gap: 28px; }
  .cards { grid-template-columns: 1fr; }
  .grid-2 { grid-template-columns: 1fr; }
  .section { padding: 72px 0; }

  .nav-toggle { display: inline-flex; align-items: center; justify-content: center; }
  .nav-links {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    background: var(--bg-elev);
    border-bottom: 1px solid var(--line);
    padding: 0 28px;
    max-height: 0;
    overflow: hidden;
    transition: max-height .3s var(--ease);
  }
  .nav-links.open { max-height: 460px; }
  .nav-links a {
    width: 100%;
    padding: 15px 0;
    border-bottom: 1px solid var(--line);
    font-size: .9rem;
  }
  .nav-links a.active::after { display: none; }
  .nav-links a.active { color: var(--accent); }
  .numeral { font-size: 6rem; top: -42px; opacity: .7; }
}

@media (max-width: 520px) {
  .wrap { padding: 0 18px; }
  .nav-inner { padding: 14px 18px; }
  .cta-row { flex-direction: column; align-items: stretch; }
  .btn { justify-content: center; }
  .footer-inner { flex-direction: column; align-items: flex-start; }
}

/* ============================================================================
   REDUCED MOTION
   ============================================================================ */
@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; scroll-behavior: auto !important; }
  .hero-anim { opacity: 1; transform: none; }
  .reveal { opacity: 1; transform: none; }
  .cursor { opacity: 1; }
}