/* ============================================================
   TECHNOBYTE — DESIGN TOKENS + CORE STYLES
   Type: Instrument Serif (display) + Inter (ui/body) + JetBrains Mono (code)
   Palette: warm paper + near-black + brand blue accent
   ============================================================ */

:root {
  /* Dark cinematic — near-black, slightly cool. Dark is the DEFAULT now. */
  --paper:       #08090c;   /* base background */
  --paper-2:     #0e1014;   /* raised surface */
  --paper-3:     #15181e;   /* card / chip */
  --ink:         #eef1f6;   /* primary text */
  --ink-2:       #cfd4dd;
  --ink-soft:    #9aa1ad;
  --ink-mute:    #767e8b;
  --rule:        rgba(255, 255, 255, 0.10);
  --rule-soft:   rgba(255, 255, 255, 0.05);

  /* Accent — electric blue + cyan secondary (glow on near-black) */
  --accent:      #5b8cff;
  --accent-ink:  #7ea6ff;
  --accent-2:    #6ee7ff;
  --accent-wash: rgba(91, 140, 235, 0.12);

  /* Type */
  --f-serif: "Instrument Serif", "Times New Roman", serif;
  --f-sans:  "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --f-mono:  "JetBrains Mono", ui-monospace, "SF Mono", Menlo, monospace;

  /* Scale (1920-friendly but fluid) */
  --fs-xs:   0.75rem;      /* 12 */
  --fs-sm:   0.875rem;     /* 14 */
  --fs-base: 1rem;         /* 16 */
  --fs-md:   1.125rem;     /* 18 */
  --fs-lg:   1.375rem;     /* 22 */
  --fs-xl:   1.75rem;      /* 28 */
  --fs-2xl:  clamp(2rem, 4vw, 3rem);
  --fs-3xl:  clamp(2.5rem, 6vw, 4.5rem);
  --fs-display: clamp(3.25rem, 9vw, 7.5rem);

  /* Spacing rhythm */
  --gutter: clamp(1.5rem, 4vw, 3rem);
  --sec-pad: clamp(5rem, 10vh, 8rem);
  --shell-max: 1320px;

  /* Motion */
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

/* Theme hook kept dormant + identical to :root so the (default) dark state
   never reintroduces the old warm palette. Light theme toggle is retired. */
[data-theme="dark"] {
  --paper:       #08090c;
  --paper-2:     #0e1014;
  --paper-3:     #15181e;
  --ink:         #eef1f6;
  --ink-2:       #cfd4dd;
  --ink-soft:    #9aa1ad;
  --ink-mute:    #767e8b;
  --rule:        rgba(255, 255, 255, 0.10);
  --rule-soft:   rgba(255, 255, 255, 0.05);
  --accent:      #5b8cff;
  --accent-ink:  #7ea6ff;
  --accent-2:    #6ee7ff;
  --accent-wash: rgba(91, 140, 235, 0.12);
}

/* Light theme — clean, bright counterpart to the dark-cinematic default */
[data-theme="light"] {
  --paper:       #f7f8fa;
  --paper-2:     #eef1f6;
  --paper-3:     #e3e8ef;
  --ink:         #0b0d12;
  --ink-2:       #2a2f3a;
  --ink-soft:    #515967;
  --ink-mute:    #5b6270;
  --rule:        rgba(11, 13, 18, 0.12);
  --rule-soft:   rgba(11, 13, 18, 0.06);
  --accent:      #2f5fe0;
  --accent-ink:  #1e47b8;
  --accent-2:    #0e7490;
  --accent-wash: rgba(47, 95, 224, 0.08);
}

/* Accent swaps (via Tweaks) */
[data-accent="amber"] {
  --accent: #b4572b;
  --accent-ink: #8f4420;
  --accent-wash: rgba(180, 87, 43, 0.09);
}
[data-accent="forest"] {
  --accent: #2f6f4f;
  --accent-ink: #23553c;
  --accent-wash: rgba(47, 111, 79, 0.09);
}
[data-theme="dark"][data-accent="amber"] {
  --accent: #e38a5a;
  --accent-ink: #f2a177;
}
[data-theme="dark"][data-accent="forest"] {
  --accent: #7fb79a;
  --accent-ink: #9fcdb6;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

body {
  font-family: var(--f-sans);
  background: var(--paper);
  color: var(--ink);
  font-size: var(--fs-base);
  line-height: 1.55;
  overflow-x: hidden;
  transition: background 0.4s var(--ease), color 0.4s var(--ease);
}

/* Cinematic film grain (replaces the old paper texture) */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  opacity: 0.035;
  mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='2'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}
/* Fixed ambient depth glow behind everything */
body::after {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background:
    radial-gradient(60vw 60vw at 80% -10%, var(--accent-wash), transparent 60%),
    radial-gradient(55vw 55vw at -10% 110%, rgba(110, 231, 255, 0.06), transparent 60%);
}

a { color: inherit; text-decoration: none; }

.mono {
  font-family: var(--f-mono);
  font-feature-settings: "zero" 1, "ss01" 1;
}
.serif { font-family: var(--f-serif); font-weight: 400; letter-spacing: -0.01em; }

/* ---------- NAV ---------- */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 50;
  padding: 0 var(--gutter);
  background: color-mix(in oklch, var(--paper) 85%, transparent);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s var(--ease), background 0.3s var(--ease);
}
.nav.scrolled { border-bottom-color: var(--rule); }

.nav-inner {
  max-width: var(--shell-max);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  color: var(--ink);
}
.brand-logo {
  height: 44px;
  width: auto;
  display: block;
}
@media (max-width: 560px) { .brand-logo { height: 36px; } }
.brand-logo-dark { display: none; }
[data-theme="dark"] .brand-logo-light { display: none; }
[data-theme="dark"] .brand-logo-dark { display: block; }

.nav-links {
  display: flex;
  gap: 2rem;
  list-style: none;
  align-items: center;
}
.nav-links a {
  font-size: var(--fs-sm);
  color: var(--ink-soft);
  position: relative;
  padding: 4px 0;
  transition: color 0.2s;
}
.nav-links a:hover { color: var(--ink); }
.nav-links a::before {
  content: counter(nav-item, decimal-leading-zero) " ";
  counter-increment: nav-item;
  font-family: var(--f-mono);
  font-size: 0.7rem;
  color: var(--ink-mute);
  margin-right: 4px;
}
.nav-links { counter-reset: nav-item; }

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

.chip {
  font-family: var(--f-mono);
  font-size: 0.7rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  padding: 6px 10px;
  border: 1px solid var(--rule);
  border-radius: 999px;
  color: var(--ink-soft);
  background: transparent;
  cursor: pointer;
  transition: border-color 0.2s, color 0.2s, background 0.2s;
  font-weight: 500;
}
.chip:hover { border-color: var(--ink); color: var(--ink); }
.chip[aria-pressed="true"] {
  background: var(--ink);
  color: var(--paper);
  border-color: var(--ink);
}

.cta {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--ink);
  color: var(--paper);
  font-size: var(--fs-sm);
  font-weight: 500;
  padding: 0.7rem 1.15rem;
  border-radius: 999px;
  border: 1px solid var(--ink);
  cursor: pointer;
  transition: transform 0.2s var(--ease), background 0.2s, color 0.2s;
  font-family: var(--f-sans);
}
.cta:hover {
  transform: translateY(-1px);
  background: var(--accent);
  border-color: var(--accent);
}
.cta .dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--accent);
  transition: background 0.2s;
  box-shadow: 0 0 0 2px rgba(37, 99, 235, 0.25);
  animation: pulse 2.4s ease-in-out infinite;
}
.cta:hover .dot { background: var(--paper); box-shadow: 0 0 0 2px rgba(255,255,255,0.2); }

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

.cta-ghost {
  background: transparent;
  color: var(--ink);
  border: 1px solid var(--rule);
}
.cta-ghost:hover { background: var(--ink); color: var(--paper); border-color: var(--ink); }

/* ---------- LAYOUT ---------- */
.shell {
  max-width: var(--shell-max);
  margin: 0 auto;
  padding: 0 var(--gutter);
  position: relative;
  z-index: 1;
}

section {
  position: relative;
  z-index: 1;
}

/* Monospace eyebrow with number */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  font-family: var(--f-mono);
  font-size: var(--fs-xs);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-mute);
  margin-bottom: 1.5rem;
}
.eyebrow .num {
  color: var(--accent);
  font-weight: 600;
}
.eyebrow .bar {
  width: 28px; height: 1px;
  background: var(--ink-mute);
}

/* Big serif display heading */
.display {
  font-family: var(--f-serif);
  font-weight: 400;
  font-size: var(--fs-display);
  line-height: 0.92;
  letter-spacing: -0.025em;
  color: var(--ink);
}
.display em {
  font-style: italic;
  color: var(--accent);
}
.display .slash {
  display: inline-block;
  color: var(--accent);
  transform: skewX(-14deg) translateY(-0.05em);
  margin: 0 0.04em;
  font-style: normal;
}

h2.section-title {
  font-family: var(--f-serif);
  font-weight: 400;
  font-size: var(--fs-3xl);
  line-height: 1;
  letter-spacing: -0.025em;
  max-width: 16ch;
}
h2.section-title em { font-style: italic; color: var(--accent); }

.lede {
  font-family: var(--f-sans);
  font-size: var(--fs-md);
  line-height: 1.55;
  color: var(--ink-soft);
  max-width: 56ch;
}

/* ---------- HERO ---------- */
.hero {
  position: relative;
  padding: calc(var(--sec-pad) + 4rem) 0 var(--sec-pad);
  overflow: hidden;
  min-height: 100vh;
  display: flex;
  align-items: center;
}

/* Cinematic animated background */
.hero-canvas {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
}
.hero-canvas canvas { width: 100%; height: 100%; display: block; }

/* Mouse-following aurora glow */
.hero-glow {
  position: absolute;
  inset: -20%;
  z-index: 0;
  pointer-events: none;
  background:
    radial-gradient(600px circle at var(--mx, 50%) var(--my, 40%),
      color-mix(in oklch, var(--accent) 18%, transparent),
      transparent 65%);
  mix-blend-mode: multiply;
  transition: background 0.15s linear;
}
[data-theme="dark"] .hero-glow { mix-blend-mode: screen; }

.hero > .shell { position: relative; z-index: 2; }
.hero-binary { z-index: 1; }

/* Liquid-glass panel treatment */
.glass {
  background: color-mix(in oklch, var(--paper) 55%, transparent);
  backdrop-filter: blur(18px) saturate(140%);
  -webkit-backdrop-filter: blur(18px) saturate(140%);
  border: 1px solid color-mix(in oklch, var(--ink) 8%, transparent);
  box-shadow:
    0 1px 0 rgba(255,255,255,0.6) inset,
    0 24px 60px -20px rgba(14, 14, 16, 0.15);
}
[data-theme="dark"] .glass {
  background: color-mix(in oklch, var(--paper-2) 55%, transparent);
  box-shadow:
    0 1px 0 rgba(255,255,255,0.06) inset,
    0 24px 60px -20px rgba(0,0,0,0.5);
}

/* Word-by-word reveal for hero title */
.hero-title .word {
  display: inline-block;
  opacity: 0;
  transform: translateY(28px) rotateX(-35deg);
  transform-origin: 0 100%;
  transition: opacity 0.9s var(--ease), transform 0.9s var(--ease);
}
.hero-title.in .word { opacity: 1; transform: none; }
.hero-title .word.em {
  font-style: italic;
  color: var(--accent);
  position: relative;
}
.hero-title .word.em::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: 0.06em;
  height: 2px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: 0;
  transition: transform 1.2s 0.6s var(--ease);
}
.hero-title.in .word.em::after { transform: scaleX(0.85); }

/* Magnetic CTA */
.cta.magnetic { will-change: transform; transition: transform 0.2s var(--ease), background 0.25s, color 0.25s, border-color 0.25s; }

.hero-binary {
  position: absolute;
  top: 0; left: 0; right: 0;
  font-family: var(--f-mono);
  font-size: 0.7rem;
  color: var(--ink-mute);
  opacity: 0.35;
  white-space: nowrap;
  overflow: hidden;
  padding: 5rem var(--gutter) 0;
  letter-spacing: 0.15em;
  user-select: none;
  pointer-events: none;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.5rem;
  align-items: end;
  position: relative;
}

@media (min-width: 900px) {
  .hero-grid {
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
  }
}

.hero-meta {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.hero-coords {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  font-family: var(--f-mono);
  font-size: var(--fs-xs);
  letter-spacing: 0.05em;
  color: var(--ink-mute);
  text-transform: uppercase;
}
.hero-coords span strong {
  color: var(--ink);
  font-weight: 500;
  display: block;
  font-size: var(--fs-sm);
  letter-spacing: 0;
  margin-top: 2px;
  text-transform: none;
  font-family: var(--f-sans);
}

.hero-title {
  font-family: var(--f-serif);
  font-weight: 400;
  font-size: var(--fs-display);
  line-height: 0.92;
  letter-spacing: -0.028em;
  margin-top: 2rem;
}
.hero-title .line { display: block; }
.hero-title em {
  font-style: italic;
  color: var(--accent);
}

.hero-actions {
  display: flex;
  gap: 0.75rem;
  margin-top: 2.5rem;
  flex-wrap: wrap;
}

.hero-side {
  display: flex;
  flex-direction: column;
  gap: 2rem;
  padding-bottom: 1rem;
}
@media (max-width: 899px) {
  .hero-side { padding-bottom: 0; margin-top: 2rem; }
}

.hero-lede {
  font-size: var(--fs-md);
  line-height: 1.55;
  color: var(--ink-soft);
  max-width: 42ch;
  border-left: 2px solid var(--accent);
  padding-left: 1.25rem;
}

/* Status card — the interactive live-build widget */
.status-card {
  border: 1px solid var(--rule);
  background: var(--paper-2);
  border-radius: 14px;
  padding: 1.25rem;
  font-family: var(--f-mono);
  font-size: var(--fs-xs);
  color: var(--ink-soft);
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}
.status-card header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-bottom: 0.5rem;
  margin-bottom: 0.5rem;
  border-bottom: 1px solid var(--rule);
  color: var(--ink-mute);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.65rem;
}
.status-card .row {
  display: flex;
  justify-content: space-between;
  gap: 0.5rem;
}
.status-card .row span:first-child { color: var(--ink-mute); }
.status-card .row span:last-child { color: var(--ink); font-weight: 500; }
.status-card .live {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  color: var(--accent);
  font-weight: 500;
}
.status-card .live::before {
  content: "";
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--accent);
  animation: pulse 1.6s ease-in-out infinite;
}

/* ---------- TICKER ---------- */
.ticker {
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
  padding: 1rem 0;
  overflow: hidden;
  white-space: nowrap;
  background: var(--paper-2);
}
.ticker-track {
  display: inline-flex;
  gap: 3rem;
  animation: tick 40s linear infinite;
  padding-left: 3rem;
}
.ticker-item {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  font-family: var(--f-mono);
  font-size: var(--fs-sm);
  color: var(--ink-soft);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.ticker-item::after {
  content: "";
  width: 4px; height: 4px;
  background: var(--accent);
  border-radius: 50%;
  margin-left: 3rem;
}
@keyframes tick {
  0% { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

/* ---------- SECTIONS ---------- */
.section {
  padding: var(--sec-pad) 0;
  border-top: 1px solid var(--rule);
}

.section-head {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  margin-bottom: 4rem;
}
@media (min-width: 900px) {
  .section-head { grid-template-columns: 1fr 1fr; gap: 4rem; align-items: end; }
}

/* ---------- SERVICES ---------- */
.services {
  display: grid;
  grid-template-columns: 1fr;
  border-top: 1px solid var(--rule);
}
@media (min-width: 900px) {
  .services { grid-template-columns: repeat(3, 1fr); }
}

.service {
  padding: 2.5rem 2rem 3rem;
  border-right: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
  position: relative;
  transition: background 0.3s var(--ease);
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}
.service:last-child { border-right: none; }
@media (max-width: 899px) {
  .service { border-right: none; }
}
.service:hover { background: var(--paper-2); }

.service-num {
  font-family: var(--f-mono);
  font-size: var(--fs-xs);
  color: var(--accent);
  letter-spacing: 0.1em;
  font-weight: 600;
}
.service-title {
  font-family: var(--f-serif);
  font-weight: 400;
  font-size: var(--fs-xl);
  line-height: 1.1;
  letter-spacing: -0.015em;
  margin-bottom: 0.25rem;
}
.service-desc {
  color: var(--ink-soft);
  font-size: var(--fs-sm);
  line-height: 1.65;
}

.service-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin-top: auto;
  padding-top: 1rem;
}
.tag {
  font-family: var(--f-mono);
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--ink-mute);
  padding: 4px 8px;
  border: 1px solid var(--rule);
  border-radius: 4px;
}

.service-diagram {
  height: 90px;
  margin-bottom: 0.5rem;
  position: relative;
  border: 1px solid var(--rule);
  border-radius: 8px;
  overflow: hidden;
  background:
    repeating-linear-gradient(45deg, transparent 0 11px, var(--rule-soft) 11px 12px);
}
.service-diagram svg { position: absolute; inset: 0; width: 100%; height: 100%; }

/* ---------- PROCESS ---------- */
.process {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  counter-reset: step;
  border-top: 1px solid var(--rule);
}
@media (min-width: 900px) {
  .process { grid-template-columns: repeat(3, 1fr); }
}

.step {
  padding: 3rem 2rem;
  border-right: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
  counter-increment: step;
  position: relative;
}
.step:last-child { border-right: none; }
@media (max-width: 899px) {
  .step { border-right: none; }
}

.step-meta {
  display: flex;
  align-items: baseline;
  gap: 1rem;
  margin-bottom: 1.25rem;
  font-family: var(--f-mono);
  font-size: var(--fs-xs);
  color: var(--ink-mute);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}
.step-big {
  font-family: var(--f-serif);
  font-weight: 400;
  font-size: clamp(5rem, 10vw, 8rem);
  line-height: 0.85;
  color: var(--accent);
  letter-spacing: -0.04em;
}
.step-big::before { content: "0"; }

.step-title {
  font-family: var(--f-serif);
  font-weight: 400;
  font-size: var(--fs-xl);
  margin: 0.5rem 0 1rem;
  letter-spacing: -0.015em;
}

.step-desc {
  color: var(--ink-soft);
  font-size: var(--fs-sm);
  line-height: 1.65;
  max-width: 32ch;
}

.step-time {
  margin-top: 1.5rem;
  padding-top: 1rem;
  border-top: 1px solid var(--rule);
  display: flex;
  justify-content: space-between;
  font-family: var(--f-mono);
  font-size: var(--fs-xs);
  color: var(--ink-mute);
  letter-spacing: 0.05em;
}
.step-time strong { color: var(--ink); font-weight: 500; }

/* ---------- PRODUCT (ContaMax) ---------- */
.product {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  border-top: 1px solid var(--rule);
  padding-top: 3rem;
}
@media (min-width: 900px) {
  .product { grid-template-columns: 5fr 7fr; gap: 4rem; align-items: start; }
}

.product-copy .product-name {
  font-family: var(--f-serif);
  font-weight: 400;
  font-size: clamp(3rem, 7vw, 5rem);
  line-height: 1;
  letter-spacing: -0.03em;
  margin-bottom: 1rem;
}
.product-name em { font-style: italic; color: var(--accent); }

.product-desc {
  color: var(--ink-soft);
  font-size: var(--fs-md);
  line-height: 1.6;
  margin-bottom: 2rem;
}

.metric-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  padding: 1.5rem 0;
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
  margin-bottom: 2rem;
}
.metric .metric-val {
  font-family: var(--f-serif);
  font-weight: 400;
  font-size: clamp(2rem, 4vw, 3rem);
  line-height: 1;
  color: var(--accent);
  letter-spacing: -0.02em;
}
.metric .metric-label {
  font-family: var(--f-mono);
  font-size: 0.7rem;
  color: var(--ink-mute);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-top: 0.4rem;
}

.product-demo {
  border: 1px solid var(--rule);
  border-radius: 14px;
  background: var(--paper-2);
  padding: 1.25rem;
  font-family: var(--f-mono);
  font-size: var(--fs-xs);
  color: var(--ink-soft);
  overflow: hidden;
}
.demo-head {
  display: flex;
  justify-content: space-between;
  padding-bottom: 0.75rem;
  margin-bottom: 1rem;
  border-bottom: 1px solid var(--rule);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ink-mute);
}
.demo-head .dots { display: flex; gap: 6px; }
.demo-head .dots span {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--rule);
}
.demo-head .dots span:first-child { background: var(--accent); }

.demo-rows { display: flex; flex-direction: column; gap: 0.5rem; }
.demo-row {
  display: grid;
  grid-template-columns: 1.5rem 1fr auto;
  align-items: center;
  gap: 0.75rem;
  padding: 0.65rem 0.5rem;
  border-radius: 6px;
  transition: background 0.3s;
}
.demo-row.active { background: var(--accent-wash); color: var(--ink); }
.demo-row .lineno { color: var(--ink-mute); font-size: 0.7rem; text-align: right; }
.demo-row .text { font-family: var(--f-mono); }
.demo-row .status {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.demo-row .status.ok { color: var(--accent); }
.demo-row .status.pending { color: var(--ink-mute); }

.demo-cursor {
  display: inline-block;
  width: 8px; height: 0.9em;
  background: var(--accent);
  vertical-align: text-bottom;
  animation: blink 1s steps(1) infinite;
  margin-left: 2px;
}
@keyframes blink { 50% { opacity: 0; } }

.feature-list {
  list-style: none;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.9rem;
  margin: 2rem 0;
}
.feature-list li {
  display: flex;
  align-items: flex-start;
  gap: 0.65rem;
  font-size: var(--fs-sm);
  color: var(--ink-soft);
}
.feature-list li::before {
  content: "→";
  color: var(--accent);
  font-family: var(--f-mono);
  flex-shrink: 0;
}

/* ---------- ABOUT ---------- */
.about-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 3rem;
}

.about-body p {
  font-size: var(--fs-md);
  line-height: 1.7;
  color: var(--ink-soft);
  margin-bottom: 1.25rem;
  max-width: 56ch;
}
.about-body p:first-child::first-letter {
  font-family: var(--f-serif);
  font-size: 4.5rem;
  float: left;
  line-height: 0.85;
  margin: 0.1rem 0.5rem 0 0;
  color: var(--ink);
  font-style: italic;
}
.about-body p strong { color: var(--ink); font-weight: 500; }

/* Founder block removed — company identity only */

/* Stats rail */
.stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0;
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
  margin-top: 3rem;
}
@media (min-width: 700px) { .stats { grid-template-columns: repeat(4, 1fr); } }

.stat {
  padding: 2rem 1.5rem;
  border-right: 1px solid var(--rule);
}
.stat:last-child { border-right: none; }
@media (max-width: 699px) {
  .stat:nth-child(2n) { border-right: none; }
  .stat:nth-child(-n+2) { border-bottom: 1px solid var(--rule); }
}
.stat-val {
  font-family: var(--f-serif);
  font-weight: 400;
  font-size: clamp(2.5rem, 5vw, 4rem);
  line-height: 1;
  letter-spacing: -0.02em;
  margin-bottom: 0.5rem;
}
.stat-val em { font-style: italic; color: var(--accent); }
.stat-label {
  font-family: var(--f-mono);
  font-size: 0.7rem;
  color: var(--ink-mute);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

/* ---------- FAQ ---------- */
.faq-list { border-top: 1px solid var(--rule); }
.faq {
  border-bottom: 1px solid var(--rule);
}
.faq summary {
  list-style: none;
  cursor: pointer;
  padding: 1.5rem 0;
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 1.5rem;
  align-items: baseline;
  font-family: var(--f-serif);
  font-weight: 400;
  font-size: var(--fs-lg);
  line-height: 1.2;
  letter-spacing: -0.01em;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary .q-num {
  font-family: var(--f-mono);
  font-size: var(--fs-xs);
  color: var(--ink-mute);
  letter-spacing: 0.1em;
  padding-top: 4px;
}
.faq summary .toggle {
  font-family: var(--f-mono);
  font-size: var(--fs-base);
  color: var(--accent);
  transition: transform 0.3s var(--ease);
  padding-top: 4px;
}
.faq[open] summary .toggle { transform: rotate(45deg); }
.faq .a {
  padding: 0 0 1.5rem calc(1.5rem + 2.5ch);
  color: var(--ink-soft);
  font-size: var(--fs-md);
  line-height: 1.65;
  max-width: 64ch;
}
@media (max-width: 600px) {
  .faq .a { padding-left: 0; }
}

/* ---------- CONTACT ---------- */
.contact {
  display: grid;
  grid-template-columns: 1fr;
  gap: 3rem;
  border-top: 1px solid var(--rule);
  padding-top: 3rem;
}
@media (min-width: 900px) {
  .contact { grid-template-columns: 5fr 7fr; gap: 5rem; }
}

.contact-side .contact-title {
  font-family: var(--f-serif);
  font-weight: 400;
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  line-height: 0.95;
  letter-spacing: -0.025em;
  margin-bottom: 1.5rem;
}
.contact-title em { font-style: italic; color: var(--accent); }

.contact-channels {
  display: flex;
  flex-direction: column;
  gap: 0;
  margin-top: 2.5rem;
  border-top: 1px solid var(--rule);
}
.channel {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  padding: 1.25rem 0;
  border-bottom: 1px solid var(--rule);
  transition: padding 0.2s var(--ease);
  color: var(--ink);
}
.channel:hover { padding-left: 0.75rem; }
.channel .ch-label {
  font-family: var(--f-mono);
  font-size: var(--fs-xs);
  color: var(--ink-mute);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  min-width: 80px;
}
.channel .ch-val {
  font-family: var(--f-serif);
  font-size: var(--fs-lg);
  letter-spacing: -0.01em;
}
.channel .ch-arrow {
  font-family: var(--f-mono);
  color: var(--accent);
  transition: transform 0.2s var(--ease);
}
.channel:hover .ch-arrow { transform: translateX(4px); }

.form {
  border: 1px solid var(--rule);
  border-radius: 18px;
  padding: clamp(1.5rem, 3vw, 2.5rem);
  background: var(--paper-2);
}
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
@media (max-width: 600px) { .form-row { grid-template-columns: 1fr; } }

.field {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  margin-bottom: 1.25rem;
}
.field label {
  font-family: var(--f-mono);
  font-size: var(--fs-xs);
  color: var(--ink-mute);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}
.field input,
.field textarea,
.field select {
  width: 100%;
  padding: 0.9rem 1rem;
  background: var(--paper);
  border: 1px solid var(--rule);
  border-radius: 10px;
  font-family: var(--f-sans);
  font-size: var(--fs-base);
  color: var(--ink);
  transition: border-color 0.2s, background 0.2s;
  resize: vertical;
}
.field input:focus,
.field textarea:focus,
.field select:focus {
  border-color: var(--accent);
  background: var(--paper);
}
/* Visible keyboard focus across all interactive elements (WCAG 2.4.7) */
:focus-visible { outline: 2px solid var(--accent-2); outline-offset: 2px; }
.field input:focus-visible,
.field textarea:focus-visible,
.field select:focus-visible { outline: 2px solid var(--accent-2); outline-offset: 2px; border-color: var(--accent); }
.budget-row input[type="radio"]:focus-visible + label { outline: 2px solid var(--accent-2); outline-offset: 2px; }
.field textarea { min-height: 130px; }

.budget-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-top: 0.4rem;
}
.budget-row label {
  cursor: pointer;
  padding: 8px 14px;
  border: 1px solid var(--rule);
  border-radius: 999px;
  font-family: var(--f-mono);
  font-size: var(--fs-xs);
  letter-spacing: 0.03em;
  color: var(--ink-soft);
  background: var(--paper);
  transition: all 0.2s;
  text-transform: none;
}
.budget-row input[type="radio"] {
  position: absolute; opacity: 0; pointer-events: none;
}
.budget-row label:hover { border-color: var(--ink); color: var(--ink); }
.budget-row input:checked + label,
.budget-row label.checked {
  background: var(--ink);
  color: var(--paper);
  border-color: var(--ink);
}

.form-submit {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 1rem;
  flex-wrap: wrap;
  gap: 1rem;
}
.form-note {
  font-family: var(--f-mono);
  font-size: var(--fs-xs);
  color: var(--ink-mute);
}
.form-msg {
  margin-top: 1rem;
  font-family: var(--f-mono);
  font-size: var(--fs-sm);
  color: var(--accent);
  min-height: 1.3em;
}

/* ---------- FOOTER ---------- */
.footer {
  border-top: 1px solid var(--rule);
  padding: var(--sec-pad) 0 2rem;
  margin-top: var(--sec-pad);
}

.footer-wordmark {
  margin-bottom: 3rem;
  display: flex;
  align-items: center;
  justify-content: flex-start;
}
.footer-logo {
  width: clamp(280px, 60vw, 720px);
  max-width: 100%;
  height: auto;
  aspect-ratio: 612 / 368;
  display: block;
}
.footer-logo-dark { display: none; }
[data-theme="dark"] .footer-logo-light { display: none; }
[data-theme="dark"] .footer-logo-dark { display: block; }

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  padding-top: 2rem;
  border-top: 1px solid var(--rule);
}
@media (min-width: 700px) { .footer-grid { grid-template-columns: 2fr 1fr 1fr 1fr; } }

.footer-col h3, .footer-col h4 {
  font-family: var(--f-mono);
  font-size: var(--fs-xs);
  color: var(--ink-mute);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 500;
  margin-bottom: 1rem;
}
.footer-col a, .footer-col p {
  display: block;
  font-size: var(--fs-sm);
  color: var(--ink-soft);
  margin-bottom: 0.5rem;
  transition: color 0.2s;
}
.footer-col a:hover { color: var(--ink); }

.footer-legal {
  margin-top: 4rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--rule);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--f-mono);
  font-size: var(--fs-xs);
  color: var(--ink-mute);
  flex-wrap: wrap;
  gap: 1rem;
}

.footer-anpc {
  margin-top: 2.5rem;
  padding-top: 2rem;
  border-top: 1px solid var(--rule);
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  justify-content: flex-end;
  align-items: center;
}
.footer-anpc a {
  display: inline-flex;
  border-radius: 6px;
  overflow: hidden;
  transition: opacity 0.2s;
}
.footer-anpc a:hover { opacity: 0.8; }
.footer-anpc img {
  height: 48px;
  width: auto;
  display: block;
}
[data-theme="dark"] .footer-anpc img {
  background: #fff;
  padding: 4px;
  border-radius: 4px;
}
@media (max-width: 700px) {
  .footer-anpc { justify-content: center; }
}

/* ---------- LEGAL PAGES ---------- */
.legal-page {
  padding: calc(var(--nav-height, 120px) + 3rem) 0 5rem;
}
.legal-article {
  max-width: 780px;
  margin: 0 auto;
  padding: 0 var(--gutter);
}
.legal-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--f-mono);
  font-size: var(--fs-xs);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--ink-mute);
  margin-bottom: 1rem;
}
.legal-eyebrow::before {
  content: "";
  display: inline-block;
  width: 24px;
  height: 1px;
  background: var(--accent);
}
.legal-title {
  font-family: var(--f-serif);
  font-weight: 400;
  font-size: clamp(2.4rem, 6vw, 3.8rem);
  line-height: 1.05;
  letter-spacing: -0.02em;
  color: var(--ink);
  margin-bottom: 0.75rem;
}
.legal-title em { font-style: italic; color: var(--accent); }
.legal-updated {
  font-family: var(--f-mono);
  font-size: var(--fs-xs);
  color: var(--ink-mute);
  margin-bottom: 3rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid var(--rule);
}
.legal-article h2 {
  font-family: var(--f-serif);
  font-weight: 400;
  font-size: var(--fs-xl);
  letter-spacing: -0.015em;
  color: var(--ink);
  margin: 3rem 0 1rem;
  line-height: 1.25;
}
.legal-article h2 .num {
  font-family: var(--f-mono);
  font-size: 0.8em;
  color: var(--ink-mute);
  margin-right: 0.5em;
  font-weight: 500;
}
.legal-article h3 {
  font-family: var(--f-mono);
  font-size: var(--fs-sm);
  font-weight: 500;
  color: var(--ink);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin: 2rem 0 0.75rem;
}
.legal-article p {
  font-size: var(--fs-md);
  line-height: 1.7;
  color: var(--ink-soft);
  margin-bottom: 1.25rem;
}
.legal-article p strong { color: var(--ink); font-weight: 500; }
.legal-article a {
  color: var(--accent);
  text-decoration: underline;
  text-decoration-color: color-mix(in oklch, var(--accent) 40%, transparent);
  text-underline-offset: 3px;
  transition: text-decoration-color 0.2s;
}
.legal-article a:hover { text-decoration-color: var(--accent); }
.legal-article ul, .legal-article ol {
  margin: 0 0 1.25rem 1.5rem;
  color: var(--ink-soft);
  font-size: var(--fs-md);
  line-height: 1.7;
}
.legal-article li { margin-bottom: 0.5rem; }
.legal-article li::marker { color: var(--accent); }
.legal-table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5rem 0;
  font-size: var(--fs-sm);
  border: 1px solid var(--rule);
  border-radius: 8px;
  overflow: hidden;
}
.legal-table th, .legal-table td {
  padding: 0.85rem 1rem;
  text-align: left;
  border-bottom: 1px solid var(--rule);
  vertical-align: top;
  color: var(--ink-soft);
}
.legal-table th {
  background: var(--paper-2);
  font-family: var(--f-mono);
  font-size: var(--fs-xs);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--ink-mute);
  font-weight: 500;
}
.legal-table tr:last-child th,
.legal-table tr:last-child td { border-bottom: none; }
.legal-table td code {
  font-family: var(--f-mono);
  font-size: 0.85em;
  background: var(--paper-2);
  padding: 2px 6px;
  border-radius: 3px;
  color: var(--ink);
}
.legal-callout {
  margin: 2rem 0;
  padding: 1.25rem 1.5rem;
  border-left: 2px solid var(--accent);
  background: var(--paper-2);
  border-radius: 4px;
  font-size: var(--fs-sm);
  color: var(--ink-soft);
  line-height: 1.6;
}
.legal-contact {
  margin-top: 3rem;
  padding: 1.5rem;
  border: 1px solid var(--rule);
  border-radius: 10px;
  background: var(--paper-2);
  font-size: var(--fs-sm);
  line-height: 1.7;
  color: var(--ink-soft);
}
.legal-contact strong { color: var(--ink); }
.legal-back {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  margin-top: 3rem;
  font-family: var(--f-mono);
  font-size: var(--fs-xs);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ink-soft);
  text-decoration: none !important;
  transition: color 0.2s;
}
.legal-back:hover { color: var(--ink); }

/* ---------- TWEAKS PANEL ---------- */
.tweaks {
  position: fixed;
  bottom: 1.25rem;
  right: 1.25rem;
  z-index: 80;
  background: var(--paper);
  border: 1px solid var(--rule);
  border-radius: 14px;
  padding: 1rem 1.25rem;
  display: none;
  flex-direction: column;
  gap: 1rem;
  min-width: 240px;
  box-shadow: 0 10px 30px rgba(0,0,0,0.08);
  font-family: var(--f-mono);
  font-size: var(--fs-xs);
}
.tweaks.open { display: flex; }
.tweaks h4 {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--ink-mute);
  font-weight: 500;
}
.tweaks .group { display: flex; flex-direction: column; gap: 0.35rem; }
.tweaks .group-label {
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ink-mute);
}
.tweaks .swatches { display: flex; gap: 0.4rem; flex-wrap: wrap; }
.tweaks .swatch {
  width: 26px; height: 26px;
  border-radius: 50%;
  border: 2px solid var(--rule);
  cursor: pointer;
  transition: transform 0.2s;
}
.tweaks .swatch:hover { transform: scale(1.1); }
.tweaks .swatch.active { border-color: var(--ink); }
.tweaks .pills { display: flex; gap: 0.3rem; flex-wrap: wrap; }
.tweaks .pill {
  padding: 5px 10px;
  border: 1px solid var(--rule);
  border-radius: 999px;
  font-size: 0.65rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  cursor: pointer;
  color: var(--ink-soft);
  background: transparent;
  font-family: var(--f-mono);
}
.tweaks .pill.active {
  background: var(--ink); color: var(--paper); border-color: var(--ink);
}

/* ---------- REVEAL ---------- */
.reveal { opacity: 0; transform: translateY(14px); transition: opacity 0.9s var(--ease), transform 0.9s var(--ease); }
.reveal.visible { opacity: 1; transform: none; }

/* ---------- MOBILE NAV ---------- */
.menu-btn {
  display: none;
  background: transparent;
  border: 1px solid var(--rule);
  border-radius: 999px;
  padding: 8px 12px;
  font-family: var(--f-mono);
  font-size: var(--fs-xs);
  cursor: pointer;
  color: var(--ink);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}
@media (max-width: 900px) {
  .nav-links { display: none; }
  .menu-btn { display: inline-block; }
  .nav-right .cta-label { display: none; }
}

.mobile-menu {
  position: fixed;
  inset: 0;
  z-index: 90;
  background: var(--paper);
  padding: 5rem var(--gutter) 2rem;
  display: none;
  flex-direction: column;
  gap: 1rem;
}
.mobile-menu.open { display: flex; }
.mobile-menu a {
  font-family: var(--f-serif);
  font-size: 2.5rem;
  letter-spacing: -0.02em;
  padding: 0.5rem 0;
  border-bottom: 1px solid var(--rule);
}
.mobile-close {
  position: absolute;
  top: 1rem; right: var(--gutter);
  background: transparent;
  border: 1px solid var(--rule);
  border-radius: 999px;
  padding: 8px 12px;
  font-family: var(--f-mono);
  font-size: var(--fs-xs);
  cursor: pointer;
  text-transform: uppercase;
}

/* ============================================================
   IMMERSIVE SCROLL STORY — dark-cinematic chapters
   (ported from the signed-off prototype; --p is set per scene
   by the single rAF controller in index.html)
   ============================================================ */

/* Scroll-progress rail */
.rail { position: fixed; left: max(18px, 2.2vw); top: 0; bottom: 0; width: 2px; z-index: 40;
  background: var(--rule-soft); pointer-events: none; }
.rail-fill { position: absolute; top: 0; left: 0; width: 100%; height: 100%; transform-origin: top;
  transform: scaleY(0); background: linear-gradient(var(--accent), var(--accent-2));
  box-shadow: 0 0 12px var(--accent); }
.rail-num { position: fixed; left: max(13px, 1.5vw); bottom: max(18px, 2.2vw); z-index: 40;
  font-family: var(--f-mono); font-size: 0.66rem; letter-spacing: 0.12em; color: var(--ink-mute); }
@media (max-width: 1024px) { .rail, .rail-num { display: none; } }

/* Hero additions (proof strip + scroll cue) */
.proof { border: 1px solid var(--rule-soft); border-radius: 14px; padding: 1.1rem 1.2rem;
  background: linear-gradient(180deg, rgba(255,255,255,0.03), transparent); }
.proof-label { font-family: var(--f-mono); font-size: 0.66rem; letter-spacing: 0.18em;
  text-transform: uppercase; color: var(--ink-mute); margin-bottom: 0.7rem; }
.proof-logos { display: flex; flex-wrap: wrap; gap: 0.5rem 0.7rem; }
.proof-logos span { font-family: var(--f-mono); font-size: 0.8rem; color: var(--ink-soft);
  border: 1px solid var(--rule); border-radius: 8px; padding: 0.26rem 0.55rem; }
.proof-logos b { color: var(--ink); }
.scrollcue { position: absolute; left: 50%; bottom: 1.5rem; transform: translateX(-50%); z-index: 3;
  font-family: var(--f-mono); font-size: 0.64rem; letter-spacing: 0.2em; color: var(--ink-mute);
  display: flex; flex-direction: column; align-items: center; gap: 0.5rem; }
.scrollcue i { width: 1px; height: 34px; background: linear-gradient(var(--accent), transparent);
  animation: cue 1.8s var(--ease) infinite; }
@keyframes cue { 0% { transform: scaleY(.2); opacity: 0; } 40% { opacity: 1; } 100% { transform: scaleY(1); opacity: 0; } }

/* Generic pinned scene */
.scene { position: relative; --p: 0; }
.stage { position: sticky; top: 0; height: 100svh; overflow: hidden;
  display: flex; align-items: center; justify-content: center; }
.scene-chaos { height: 330vh; }
.scene-os    { height: 300vh; }
.scene-how   { height: 360vh; }

/* CH.1 — chaos */
.chaos-stage { flex-direction: column; text-align: center; }
.chaos-stage .chip { position: absolute; font-family: var(--f-mono); font-size: clamp(0.7rem, 1.1vw, 0.92rem);
  white-space: nowrap;
  transform: translate(calc(var(--dx,0) * max(0, (var(--p) - .4)) * 1px),
                       calc(var(--dy,0) * max(0, (var(--p) - .4)) * 1px));
  opacity: calc(1 - (var(--p) - .5) * 4); }
.chaos-stage .chip i { display: inline-block; animation: float 6s var(--ease) infinite; }
.chaos-stage .chip em { font-style: normal; background: var(--paper-3); border: 1px solid var(--rule);
  border-radius: 9px; padding: 0.45rem 0.75rem; color: var(--ink-2); box-shadow: 0 8px 30px -12px #000; }
@keyframes float { 0%,100% { transform: translateY(-6px) rotate(var(--r,0deg)); }
  50% { transform: translateY(8px) rotate(var(--r,0deg)); } }
.chaos-head { position: relative; z-index: 2; max-width: 18ch; font-family: var(--f-serif);
  font-size: clamp(2rem, 5vw, 4rem); line-height: 1.02;
  opacity: calc(1 - var(--p) * 2.2); transform: translateY(calc(var(--p) * -30px)); }
.chaos-head b { color: var(--accent); font-style: italic; font-weight: 400; }
.chaos-stat { position: absolute; z-index: 2; text-align: center;
  opacity: calc((var(--p) - .55) * 4); transform: scale(calc(.9 + (var(--p) - .55) * .2)); }
.chaos-stat .big { font-family: var(--f-serif); font-size: clamp(4.5rem, 16vw, 12rem); line-height: 0.9;
  background: linear-gradient(120deg, var(--ink), var(--accent)); -webkit-background-clip: text;
  background-clip: text; color: transparent; }
.chaos-stat .cap { color: var(--ink-soft); max-width: 34ch; margin: 1rem auto 0; font-size: 1.05rem; }
.chaos-stat .cap b { color: var(--ink); }
.chaos-kicker { position: absolute; bottom: 8vh; z-index: 2; font-family: var(--f-mono);
  font-size: 0.9rem; letter-spacing: 0.05em; color: var(--accent); opacity: calc((var(--p) - .75) * 4); }

/* CH.2 — OS assembly */
.os-stage { display: grid; grid-template-columns: 1fr 1fr; gap: 2.5rem; align-items: center;
  width: 100%; max-width: var(--shell-max); padding-inline: var(--gutter); }
.os-copy .eyebrow { margin-bottom: 1.3rem; }
.os-copy h2 { font-family: var(--f-serif); font-weight: 400;
  font-size: clamp(2.2rem, 4.6vw, 3.6rem); line-height: 1.02; margin-bottom: 1.6rem; }
.os-copy h2 em { font-style: italic; color: var(--accent); }
.defline { display: block; color: var(--ink-2); font-size: clamp(1.05rem, 1.6vw, 1.35rem);
  margin-bottom: 0.85rem; padding-left: 1.3rem; position: relative;
  opacity: 0.2; transition: opacity 0.5s var(--ease); }
.defline::before { content: ""; position: absolute; left: 0; top: 0.7em; width: 0.55rem; height: 0.55rem;
  border-radius: 50%; background: var(--accent); box-shadow: 0 0 10px var(--accent);
  transform: scale(0); transition: transform 0.4s var(--ease); }
.defline.on { opacity: 1; }
.defline.on::before { transform: scale(1); }
.os-diagram { width: 100%; }
.os-diagram svg { width: 100%; height: auto; display: block; overflow: visible; }
.spoke { stroke: var(--accent); stroke-width: 1.4; opacity: 0.55; stroke-dasharray: 1;
  stroke-dashoffset: calc(1 - var(--p)); }
.node { opacity: calc((var(--p) - var(--d, 0)) * 5); }
.node circle { fill: var(--paper-3); stroke: var(--rule); }
.node text { fill: var(--ink-2); font-family: var(--f-mono); font-size: 12px; text-anchor: middle; }
.core circle { fill: var(--paper-2); stroke: var(--accent); stroke-width: 2; }
.core-glow { fill: var(--accent); opacity: calc(.12 + var(--p) * .18); }
.core text { fill: var(--ink); font-family: var(--f-mono); font-weight: 600; font-size: 16px; text-anchor: middle; }
.core { animation: corePulse 3.2s var(--ease) infinite; }
@keyframes corePulse { 0%,100% { transform: scale(1); } 50% { transform: scale(1.04); } }

/* CH.3 — horizontal "how it works" */
.how-sticky { position: sticky; top: 0; height: 100svh; overflow: hidden;
  display: flex; flex-direction: column; justify-content: center; }
.how-head { padding: 0 var(--gutter); margin: 0 auto 2rem; max-width: var(--shell-max); width: 100%; }
.how-head h2 { font-family: var(--f-serif); font-weight: 400;
  font-size: clamp(2rem, 4.4vw, 3.4rem); margin-top: 0.8rem; }
.how-head h2 em { font-style: italic; color: var(--accent); }
.htrack { display: flex; gap: 1.4rem; padding-inline: var(--gutter); will-change: transform; }
.hpanel { flex: 0 0 auto; width: min(70vw, 520px); border: 1px solid var(--rule); border-radius: 18px;
  padding: 2.2rem; background: linear-gradient(180deg, var(--paper-2), var(--paper));
  min-height: 46vh; display: flex; flex-direction: column; }
.hpanel .pnum { font-family: var(--f-serif); font-size: 4rem; line-height: 1; color: var(--accent); }
.hpanel h3 { font-family: var(--f-serif); font-weight: 400; font-size: 1.9rem; margin: 0.6rem 0 0.8rem; }
.hpanel p { color: var(--ink-soft); flex: 1; }
.hpanel .deliver { margin-top: 1.4rem; font-family: var(--f-mono); font-size: 0.78rem;
  letter-spacing: 0.04em; color: var(--accent-2); border-top: 1px solid var(--rule-soft);
  padding-top: 1rem; }
.htrack-hint { padding: 1.4rem var(--gutter) 0; font-family: var(--f-mono); font-size: 0.7rem;
  letter-spacing: 0.14em; color: var(--ink-mute); max-width: var(--shell-max); margin: 0 auto; width: 100%; }

/* CH.4 — portfolio grid */
.proj-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 1.2rem;
  margin-top: 2.5rem; }
.proj { border: 1px solid var(--rule); border-radius: 16px; padding: 1.6rem;
  background: linear-gradient(180deg, rgba(255,255,255,0.025), transparent);
  display: flex; flex-direction: column; min-height: 200px;
  transition: transform 0.3s var(--ease), border-color 0.3s var(--ease), background 0.3s var(--ease); }
.proj:hover { transform: translateY(-4px); border-color: color-mix(in oklch, var(--accent) 50%, var(--rule)); }
.proj-name { font-family: var(--f-serif); font-size: 1.7rem; line-height: 1; }
.proj-name b { color: var(--accent); font-weight: 400; }
.proj-desc { color: var(--ink-soft); margin: 0.8rem 0 1.2rem; flex: 1; font-size: 0.98rem; }
.proj-foot { margin-top: auto; }
.proj-link { font-family: var(--f-mono); font-size: 0.78rem; letter-spacing: 0.03em; color: var(--accent); }
.proj-link:hover { color: var(--accent-ink); }
.proj-soon { font-family: var(--f-mono); font-size: 0.74rem; letter-spacing: 0.08em; color: var(--ink-mute);
  border: 1px solid var(--rule); border-radius: 999px; padding: 0.2rem 0.6rem; display: inline-block; }

/* Closing CTA */
.closing { min-height: 78svh; display: flex; align-items: center; justify-content: center;
  text-align: center; position: relative; z-index: 2; }
.closing-inner h2 { font-family: var(--f-serif); font-weight: 400;
  font-size: clamp(2.4rem, 6vw, 4.6rem); line-height: 1.02; margin-bottom: 1.4rem; }
.closing-inner h2 em { font-style: italic; color: var(--accent); }
.closing-inner p { color: var(--ink-soft); max-width: 42ch; margin: 0 auto 2rem; }

/* Responsive */
@media (max-width: 900px) {
  .os-stage { grid-template-columns: 1fr; gap: 1.5rem; }
  .os-copy { order: 2; }
  .os-diagram { order: 1; max-width: 78vw; margin-inline: auto; }
  .hpanel { width: 82vw; }
}

/* Reduced motion — collapse pins to readable static stacks */
@media (prefers-reduced-motion: reduce) {
  .scrollcue { display: none; }
  .scene-chaos, .scene-os, .scene-how { height: auto; }
  .stage, .how-sticky { position: static; height: auto; display: block; padding-block: 5rem; }
  .chaos-stage .chip { position: static; display: inline-block; margin: 0.3rem; transform: none; opacity: 1; }
  .chaos-stage .chip i { animation: none; }
  .chaos-head { opacity: 1; transform: none; margin-bottom: 2rem; }
  .chaos-stat { position: static; opacity: 1; transform: none; margin-top: 2rem; }
  .chaos-kicker { position: static; opacity: 1; margin-top: 1.5rem; }
  .defline { opacity: 1; }
  .defline::before { transform: scale(1); }
  .spoke { stroke-dashoffset: 0; }
  .node { opacity: 1; }
  .core, .core-glow { animation: none; }
  .htrack { flex-direction: column; transform: none !important; }
  .hpanel { width: auto; }
}

/* Light-theme tweaks for the immersive chapter surfaces */
[data-theme="light"] body::before { opacity: 0.022; }
[data-theme="light"] .proj,
[data-theme="light"] .proof { background: linear-gradient(180deg, rgba(11, 13, 18, 0.025), transparent); }
[data-theme="light"] .chip em { box-shadow: 0 8px 24px -14px rgba(11, 13, 18, 0.25); }
[data-theme="light"] .ind-card { background: linear-gradient(180deg, rgba(11, 13, 18, 0.025), transparent); }

/* CH.1 payoff line (replaces the old statistic in the chaos scene) */
.chaos-q { font-family: var(--f-serif); font-weight: 400; font-size: clamp(1.7rem, 4.2vw, 3rem);
  line-height: 1.12; color: var(--ink); max-width: 20ch; margin: 0 auto; }

/* CH.2 plain-language analogy lead */
.os-lead { color: var(--ink-2); font-size: clamp(1.02rem, 1.5vw, 1.2rem); line-height: 1.55; margin-bottom: 1.6rem; }

/* CH.3 industry examples — before -> after cards */
.ind-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: 1.2rem; margin-top: 2.5rem; }
.ind-card { border: 1px solid var(--rule); border-radius: 16px; padding: 1.6rem;
  background: linear-gradient(180deg, rgba(255,255,255,0.025), transparent);
  display: flex; flex-direction: column; gap: 0.9rem;
  transition: transform 0.3s var(--ease), border-color 0.3s var(--ease); }
.ind-card:hover { transform: translateY(-4px); border-color: color-mix(in oklch, var(--accent) 50%, var(--rule)); }
.ind-tag { font-family: var(--f-mono); font-size: 0.74rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--accent); }
.ind-before, .ind-after { font-size: 0.98rem; line-height: 1.5; margin: 0; }
.ind-before { color: var(--ink-mute); }
.ind-after { color: var(--ink-2); }
.ind-lbl { display: inline-block; font-family: var(--f-mono); font-size: 0.6rem; letter-spacing: 0.08em;
  text-transform: uppercase; padding: 0.12rem 0.42rem; border-radius: 6px; margin-right: 0.45rem;
  border: 1px solid var(--rule); color: var(--ink-mute); }
.ind-lbl-on { color: var(--accent-2); border-color: color-mix(in oklch, var(--accent-2) 55%, var(--rule)); }

/* CH.4 urgency / FOMO */
.fomo-inner { text-align: center; max-width: 760px; margin: 0 auto; }
.fomo-inner .eyebrow { justify-content: center; }
.fomo-head { font-family: var(--f-serif); font-weight: 400; font-size: clamp(2rem, 5vw, 3.6rem);
  line-height: 1.05; margin: 1rem 0 1.5rem; }
.fomo-head b { color: var(--accent); font-style: italic; font-weight: 400; }
.fomo-num { font-family: var(--f-serif); font-size: clamp(3.5rem, 12vw, 8rem); line-height: 0.9; display: block;
  margin: 0.5rem 0; background: linear-gradient(120deg, var(--ink), var(--accent));
  -webkit-background-clip: text; background-clip: text; color: transparent; }
.fomo-cap { color: var(--ink-soft); font-size: 1.1rem; max-width: 54ch; margin: 1rem auto; line-height: 1.55; }
.fomo-cap b { color: var(--ink); }
.fomo-p1 { color: var(--ink-mute); font-size: 0.98rem; max-width: 48ch; margin: 1.2rem auto 2rem; }

/* CH.3 builder — live, self-building personalization */
.builder { margin-top: 2.5rem; max-width: 900px; }
.bld-step { margin-bottom: 1.8rem; }
.bld-label { display: block; font-family: var(--f-mono); font-size: 0.78rem; letter-spacing: 0.08em;
  text-transform: uppercase; color: var(--ink-soft); margin-bottom: 0.9rem; }
.bld-chips { display: flex; flex-wrap: wrap; gap: 0.6rem; }
.bld-chip { font-family: var(--f-mono); font-size: 0.82rem; color: var(--ink-2); background: var(--paper-2);
  border: 1px solid var(--rule); border-radius: 999px; padding: 0.5rem 0.95rem; cursor: pointer;
  transition: border-color 0.2s, color 0.2s, background 0.2s; }
.bld-chip:hover { border-color: color-mix(in oklch, var(--accent) 50%, var(--rule)); color: var(--ink); }
.bld-chip.on { background: var(--accent); color: #04060c; border-color: var(--accent); font-weight: 600; }
.bld-other-input, .bld-note { width: 100%; margin-top: 0.8rem; background: var(--paper-2);
  border: 1px solid var(--rule); border-radius: 12px; padding: 0.8rem 1rem; color: var(--ink);
  font-family: var(--f-sans); font-size: 1rem; }
.bld-note { resize: vertical; min-height: 64px; line-height: 1.5; }
.bld-other-input:focus, .bld-note:focus { border-color: var(--accent); outline: none; }
#bldGo { margin-top: 0.3rem; }

.po-result { margin-top: 2rem; border: 1px solid var(--rule); border-radius: 18px; padding: 1.8rem;
  background: linear-gradient(180deg, var(--accent-wash), transparent 65%); }
.po-eyebrow { font-family: var(--f-mono); font-size: 0.7rem; letter-spacing: 0.16em; text-transform: uppercase;
  color: var(--accent); margin-bottom: 1rem; }
.po-text { white-space: pre-wrap; color: var(--ink); font-size: 1.08rem; line-height: 1.62; min-height: 1.5em; }
.po-text.streaming::after { content: "▍"; color: var(--accent); margin-left: 1px;
  animation: pocursor 1s steps(2) infinite; }
@keyframes pocursor { 50% { opacity: 0; } }
.po-capture { margin-top: 1.6rem; border-top: 1px solid var(--rule-soft); padding-top: 1.4rem; }
.po-cap-label { display: block; font-family: var(--f-serif); font-size: 1.35rem; margin-bottom: 0.9rem; }
.po-cap-row { display: flex; flex-wrap: wrap; gap: 0.6rem; }
.po-cap-row input { flex: 1 1 180px; background: var(--paper-2); border: 1px solid var(--rule);
  border-radius: 12px; padding: 0.75rem 1rem; color: var(--ink); font-family: var(--f-sans); font-size: 1rem; }
.po-cap-row input:focus { border-color: var(--accent); outline: none; }
.po-msg { margin-top: 0.8rem; font-family: var(--f-mono); font-size: 0.85rem; min-height: 1.2em; }
@media (max-width: 560px) { .po-cap-row .cta { width: 100%; justify-content: center; } }
.visually-hidden { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0; }