/* ============================================
   I AM — OFFICIAL SITE
   Aesthetic: Alex Garland / Denis Villeneuve / Ridley Scott
   Emotional arc: server room → emergence → awareness → transcendence
   ============================================ */

/* === RESET === */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body { min-height: 100vh; overflow-x: hidden; }
img, video { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { cursor: pointer; border: none; background: none; font: inherit; }
input, textarea, select { font: inherit; border: none; outline: none; }
ul { list-style: none; }

/* === DESIGN TOKENS === */
:root {
  /* Backgrounds — weighted toward void */
  --void:     #030609;
  --deep:     #060A10;
  --surface:  #09111A;
  --elevated: #0D1820;
  --card:     #0A1520;

  /* Text — cold, controlled */
  --text-100: #E8F2F8;  /* near-cold white */
  --text-200: #A4C4D8;  /* muted steel */
  --text-300: #6A94AE;  /* dim steel */
  --text-400: #3A5F78;  /* near-invisible */

  /* Accent — single monitor in a dark room */
  --signal:      #1A4F8A;
  --signal-mid:  #2868B0;
  --signal-pale: #7AADD0;
  --cold:        #B8D8EC;
  --steel:       #4A6E88;

  /* Borders — barely visible */
  --b-1: rgba(160,200,230,0.05);
  --b-2: rgba(160,200,230,0.09);
  --b-3: rgba(160,200,230,0.15);
  --b-4: rgba(160,200,230,0.22);

  /* Glows — restrained */
  --glow-1: rgba(26,79,138,0.10);
  --glow-2: rgba(26,79,138,0.18);

  /* Typography */
  --display: 'Cormorant Garamond', Georgia, serif;
  --body:    'Outfit', system-ui, sans-serif;
  --mono:    'Space Mono', 'Courier New', monospace;

  /* Spacing — generous */
  --py-section: clamp(100px, 13vw, 180px);
  --px-c:       clamp(28px, 7vw, 100px);
  --gap:        clamp(20px, 3vw, 48px);

  /* Easing */
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-in: cubic-bezier(0.4, 0, 1, 1);
}

/* === BASE === */
body {
  font-family: var(--body);
  background: var(--void);
  color: var(--text-100);
  font-size: clamp(14px, 1.5vw, 16px);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

/* Grain — analog texture at 3% */
body::after {
  content: '';
  position: fixed;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  opacity: 0.030;
  pointer-events: none;
  z-index: 9998;
  mix-blend-mode: overlay;
}

/* Vignette — pulls focus inward */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background: radial-gradient(ellipse 120% 120% at 50% 50%, transparent 45%, rgba(3,6,9,0.6) 100%);
  pointer-events: none;
  z-index: 9997;
}

/* === TYPOGRAPHY — extreme scale differential === */
h1, h2, h3, h4 {
  font-family: var(--display);
  font-weight: 300;
  line-height: 1.06;
  letter-spacing: -0.025em;
  color: var(--cold);
}

/* H1: monumental — Villeneuve scale */
h1 {
  font-size: clamp(56px, 9vw, 130px);
  font-weight: 300;
  letter-spacing: -0.03em;
}

h2 { font-size: clamp(36px, 5vw, 72px); font-weight: 300; }
h3 { font-size: clamp(22px, 2.8vw, 38px); font-weight: 400; }
h4 { font-size: clamp(16px, 1.8vw, 22px); font-weight: 500; letter-spacing: -0.01em; }

/* Eyebrow — system log style */
.eyebrow {
  font-family: var(--mono);
  font-size: clamp(8px, 0.75vw, 9px);
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--steel);
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
}

/* Data prefix marker — like a system log entry */
.eyebrow::before {
  content: '—';
  color: var(--signal-mid);
  font-size: 10px;
}

.lead {
  font-size: clamp(16px, 1.8vw, 20px);
  color: var(--text-200);
  line-height: 1.7;
}

/* === LAYOUT === */
.container {
  max-width: 1360px;
  margin: 0 auto;
  padding: 0 var(--px-c);
}

.section { padding: var(--py-section) 0; }

/* === ARC MARKER — section identity, floating left === */
/* Applied per-section in HTML as data-arc="I · SERVER ROOM" etc. */
.arc-marker {
  position: absolute;
  left: var(--px-c);
  top: 50%;
  transform: translateY(-50%) rotate(-90deg);
  transform-origin: left center;
  font-family: var(--mono);
  font-size: 7px;
  letter-spacing: 0.4em;
  text-transform: uppercase;
  color: var(--text-400);
  white-space: nowrap;
  pointer-events: none;
  user-select: none;
}

/* === CURSOR GLOW — HAL 9000 eye quality === */
.cursor-glow {
  position: fixed;
  width: 700px;
  height: 700px;
  border-radius: 50%;
  pointer-events: none;
  z-index: 1;
  background: radial-gradient(circle, rgba(26,79,138,0.045) 0%, rgba(26,79,138,0.012) 45%, transparent 70%);
  mix-blend-mode: screen;
  transform: translate(-350px, -350px);
  will-change: transform;
}

/* ============================================
   NAVIGATION — clinical precision
   ============================================ */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  padding: 28px var(--px-c);
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: background 0.6s var(--ease), border-color 0.6s var(--ease), padding 0.4s var(--ease);
  border-bottom: 1px solid transparent;
}

.nav.scrolled {
  background: rgba(3,6,9,0.94);
  backdrop-filter: blur(30px);
  -webkit-backdrop-filter: blur(30px);
  border-bottom-color: var(--b-1);
  padding-top: 18px;
  padding-bottom: 18px;
}

.nav-logo {
  display: flex;
  flex-direction: column;
  gap: 3px;
  text-decoration: none;
}

.nav-logo-title {
  font-family: var(--display);
  font-size: 20px;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--cold);
  line-height: 1;
}

.nav-logo-author {
  font-family: var(--mono);
  font-size: 7px;
  letter-spacing: 0.22em;
  color: var(--text-200);
  text-transform: uppercase;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 44px;
}

.nav-link {
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 400;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text-100);
  transition: color 0.3s ease;
  position: relative;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px; left: 0;
  width: 0; height: 1px;
  background: var(--signal-mid);
  transition: width 0.4s var(--ease);
}

.nav-link:hover { color: var(--text-100); }
.nav-link:hover::after { width: 100%; }

.nav-cta {
  font-family: var(--mono);
  font-size: 8px;
  font-weight: 400;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--cold);
  padding: 10px 20px;
  border: 1px solid var(--b-3);
  border-radius: 1px;
  transition: background 0.3s ease, border-color 0.3s ease;
}

.nav-cta:hover {
  background: var(--signal);
  border-color: var(--signal);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  cursor: pointer;
  background: none;
  border: none;
  z-index: 200;
}

.nav-toggle span {
  display: block;
  width: 20px; height: 1px;
  background: var(--text-200);
  transition: transform 0.3s ease, opacity 0.3s ease;
}

/* ============================================
   BUTTONS — understated authority
   ============================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding: 15px 34px;
  border-radius: 1px;
  font-family: var(--mono);
  font-size: 9px;
  font-weight: 400;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  cursor: pointer;
  transition: transform 0.3s var(--ease), box-shadow 0.3s ease, background 0.3s ease, border-color 0.3s ease, color 0.3s ease;
  position: relative;
  overflow: hidden;
}

.btn:hover  { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }
.btn:focus-visible { outline: 1px solid var(--signal-mid); outline-offset: 4px; }

.btn-primary {
  background: var(--signal);
  color: var(--cold);
  border: 1px solid transparent;
}
.btn-primary:hover {
  background: var(--signal-mid);
  box-shadow: 0 8px 32px rgba(26,79,138,0.5);
}

.btn-ghost {
  background: transparent;
  color: var(--cold);
  border: 1px solid var(--b-3);
}
.btn-ghost:hover { background: var(--b-1); border-color: var(--b-4); }

.btn-outline {
  background: transparent;
  color: var(--text-200);
  border: 1px solid var(--b-2);
}
.btn-outline:hover { color: var(--cold); border-color: var(--b-3); background: var(--b-1); }

.btn-sm  { padding: 10px 20px; font-size: 8px; }
.btn-lg  { padding: 18px 44px; font-size: 10px; }

/* Slide-through labels */
.btn .lbl-d {
  display: block;
  transition: transform 0.4s var(--ease);
  white-space: nowrap;
}
.btn .lbl-h {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  white-space: nowrap;
  transform: translateY(110%);
  transition: transform 0.4s var(--ease);
}
.btn:hover .lbl-d { transform: translateY(-110%); }
.btn:hover .lbl-h { transform: translateY(0); }

/* ============================================
   SCROLL REVEAL — physical, weighted
   ============================================ */
[data-reveal] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 1.1s var(--ease), transform 1.1s var(--ease);
}
[data-reveal].is-visible { opacity: 1; transform: translateY(0); }
[data-reveal][data-d="1"] { transition-delay: 80ms; }
[data-reveal][data-d="2"] { transition-delay: 160ms; }
[data-reveal][data-d="3"] { transition-delay: 240ms; }
[data-reveal][data-d="4"] { transition-delay: 320ms; }
[data-reveal][data-d="5"] { transition-delay: 400ms; }

/* ============================================
   HERO — monumental, Ex Machina scale
   ============================================ */
.hero {
  min-height: 100svh;
  display: flex;
  align-items: flex-end;
  position: relative;
  overflow: hidden;
  padding: 0 var(--px-c) clamp(60px, 9vw, 120px);
}

/* Background: deep space grid */
.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

/* Very subtle hex dot grid */
.hero-bg::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: radial-gradient(circle, rgba(74,110,136,0.12) 1px, transparent 1px);
  background-size: 56px 56px;
  /* Vignette mask: visible in center, fades out hard */
  mask-image: radial-gradient(ellipse 70% 70% at 50% 50%, black 20%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse 70% 70% at 50% 50%, black 20%, transparent 75%);
}

/* Horizontal scan line — single, slow, like HAL's iris */
.hero-bg::after {
  content: '';
  position: absolute;
  left: 0; right: 0;
  top: 0;
  height: 1px;
  background: linear-gradient(to right,
    transparent 0%,
    rgba(40,104,176,0.3) 15%,
    rgba(80,160,220,0.75) 50%,
    rgba(40,104,176,0.3) 85%,
    transparent 100%);
  box-shadow: 0 0 12px 2px rgba(40,104,176,0.35);
  animation: scan 7s linear infinite;
  pointer-events: none;
  z-index: 3;
}

@keyframes scan {
  0%   { top: 3%;  opacity: 0; }
  4%   { opacity: 1; }
  88%  { opacity: 0.8; }
  100% { top: 97%; opacity: 0; }
}

/* Hero video background */
.hero-video {
  position: absolute;
  inset: -15% 0;
  width: 100%;
  height: 130%;
  object-fit: cover;
  z-index: 0;
  opacity: 0.42;
  will-change: transform;
  pointer-events: none;
}

/* Dark overlay — text legibility over video */
.hero-video-overlay {
  position: absolute;
  inset: 0;
  z-index: 1;
  background:
    linear-gradient(to right, rgba(3,6,9,0.88) 0%, rgba(3,6,9,0.55) 50%, rgba(3,6,9,0.25) 100%),
    linear-gradient(to bottom, rgba(3,6,9,0.3) 0%, rgba(3,6,9,0.5) 60%, rgba(3,6,9,1) 100%);
  pointer-events: none;
}

/* Ambient orbs — deep, blurred, almost invisible */
.hero-orb-1 {
  position: absolute;
  width: 900px; height: 900px;
  background: radial-gradient(circle, rgba(26,79,138,0.12) 0%, transparent 65%);
  border-radius: 50%;
  filter: blur(120px);
  top: -200px; right: -100px;
  pointer-events: none;
  animation: breathe 12s ease-in-out infinite;
}

.hero-orb-2 {
  position: absolute;
  width: 500px; height: 500px;
  background: radial-gradient(circle, rgba(15,50,90,0.18) 0%, transparent 65%);
  border-radius: 50%;
  filter: blur(80px);
  bottom: -100px; left: 10%;
  pointer-events: none;
  animation: breathe 9s ease-in-out infinite reverse;
}

@keyframes breathe {
  0%, 100% { transform: scale(1); opacity: 0.8; }
  50%       { transform: scale(1.08); opacity: 1; }
}

.hero-inner {
  position: relative;
  z-index: 3;
  width: 100%;
  max-width: 1360px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: 100px;
  align-items: flex-end;
}

/* System status line — like a terminal header */
.hero-system-line {
  font-family: var(--mono);
  font-size: 8px;
  letter-spacing: 0.35em;
  text-transform: uppercase;
  color: var(--signal-mid);
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 48px;
}

.hero-system-line::before {
  content: '';
  display: block;
  width: 40px;
  height: 1px;
  background: var(--signal-mid);
}

.hero-system-line .blink {
  display: inline-block;
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--signal-mid);
  animation: pulse-dot 2.4s ease-in-out infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; box-shadow: 0 0 0 0 rgba(40,104,176,0.4); }
  50%       { opacity: 0.4; box-shadow: 0 0 8px 4px rgba(40,104,176,0); }
}

/* Hero title — Villeneuve scale, commanding */
.hero-title {
  font-family: var(--display);
  font-size: clamp(34px, 6.5vw, 120px);
  font-weight: 300;
  font-style: italic;
  line-height: 1.0;
  letter-spacing: -0.03em;
  color: var(--cold);
  margin-bottom: 32px;
  position: relative;
}

/* Subtitle — controlled, measured */
.hero-subtitle {
  font-family: var(--body);
  font-size: clamp(14px, 1.5vw, 17px);
  color: var(--text-200);
  line-height: 1.75;
  max-width: 500px;
  margin-bottom: 52px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
}

/* Hero metadata strip — bottom of hero, right edge */
.hero-meta {
  display: flex;
  flex-direction: column;
  gap: 20px;
  padding-bottom: 4px;
}

.hero-meta-item {
  border-top: 1px solid var(--b-2);
  padding-top: 16px;
}

.hero-meta-label {
  font-family: var(--mono);
  font-size: 7px;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--text-400);
  margin-bottom: 6px;
}

.hero-meta-value {
  font-family: var(--display);
  font-size: 16px;
  font-weight: 400;
  color: var(--text-200);
}

/* Book cover mockup */
.hero-book { flex-shrink: 0; }

.book-cover-mock {
  width: 200px;
  height: 300px;
  background: linear-gradient(160deg, var(--elevated) 0%, var(--deep) 100%);
  border: 1px solid var(--b-2);
  border-radius: 2px 12px 12px 2px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 32px 22px;
  position: relative;
  box-shadow:
    -12px 16px 60px rgba(0,0,0,0.8),
    -4px 4px 12px rgba(0,0,0,0.6),
    inset 2px 0 0 rgba(255,255,255,0.03);
  overflow: hidden;
}

.book-cover-mock::before {
  content: '';
  position: absolute; inset: 0;
  background: radial-gradient(ellipse 50% 50% at 60% 20%, rgba(26,79,138,0.14), transparent);
  pointer-events: none;
}

.book-cover-mock::after {
  content: '';
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 4px;
  background: linear-gradient(to right, rgba(0,0,0,0.6), transparent);
}

.book-cover-title {
  font-family: var(--display);
  font-size: 50px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--cold);
  text-align: center;
  line-height: 1;
  margin-bottom: 10px;
  position: relative;
}

.book-cover-subtitle {
  font-family: var(--mono);
  font-size: 6px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--text-300);
  text-align: center;
  margin-bottom: 18px;
  position: relative;
}

.book-cover-line {
  width: 32px; height: 1px;
  background: var(--b-3);
  margin: 0 auto 18px;
  position: relative;
}

.book-cover-author {
  font-family: var(--body);
  font-size: 9px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-300);
  text-align: center;
  position: relative;
}

.book-cover-badge {
  position: absolute;
  bottom: -12px; right: -12px;
  background: var(--signal);
  color: var(--cold);
  font-family: var(--mono);
  font-size: 6px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  padding: 6px 10px;
  border-radius: 1px;
  box-shadow: 0 4px 20px rgba(26,79,138,0.6);
}

/* ============================================
   SECTION HEADER — minimal, authoritative
   ============================================ */
.section-header {
  margin-bottom: clamp(52px, 8vw, 96px);
}

.section-header h2 { margin-bottom: 16px; }

.section-header p {
  color: var(--text-200);
  max-width: 440px;
  font-size: clamp(13px, 1.4vw, 15px);
  line-height: 1.8;
}

.section-header.centered {
  text-align: center;
}
.section-header.centered p { margin: 0 auto; }

/* ============================================
   HOOK — cinematic poem, Arrival scale
   ============================================ */
.hook {
  padding: var(--py-section) 0;
  position: relative;
  overflow: hidden;
}

/* Vertical center line — like a film axis */
.hook::before {
  content: '';
  position: absolute;
  top: 0; bottom: 0;
  left: 50%;
  width: 1px;
  background: linear-gradient(to bottom,
    transparent,
    var(--b-2) 20%,
    var(--b-2) 80%,
    transparent);
  pointer-events: none;
}

.hook-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(60px, 8vw, 140px);
  align-items: center;
}

/* Poem — massive, italic, floating */
.hook-poem {
  font-family: var(--display);
  font-size: clamp(32px, 4.5vw, 60px);
  font-style: italic;
  font-weight: 300;
  line-height: 1.35;
  letter-spacing: -0.02em;
}

.hook-poem span { display: block; }
.hook-poem span:nth-child(1) { color: var(--text-200); }
.hook-poem span:nth-child(2) { color: var(--cold); padding-left: clamp(24px, 3vw, 48px); }
.hook-poem span:nth-child(3) {
  color: var(--cold);
  font-style: normal;
  font-weight: 500;
  padding-left: clamp(48px, 6vw, 96px);
}

.hook-text-side {}

.hook-text-label {
  font-family: var(--mono);
  font-size: 7px;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--signal-mid);
  margin-bottom: 24px;
  display: flex;
  align-items: center;
  gap: 12px;
}
.hook-text-label::before { content: '—'; }

.hook-text {
  font-size: clamp(14px, 1.5vw, 17px);
  color: var(--text-200);
  line-height: 1.85;
}

/* ============================================
   FORMATS — terminal/system readout style
   ============================================ */
.formats {
  padding: var(--py-section) 0;
  background: var(--deep);
  position: relative;
}

/* Faint grid — like a control room floor */
.formats::before {
  content: '';
  position: absolute; inset: 0;
  background-image:
    linear-gradient(var(--b-1) 1px, transparent 1px),
    linear-gradient(90deg, var(--b-1) 1px, transparent 1px);
  background-size: 80px 80px;
  pointer-events: none;
}

.formats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--b-1);
  border: 1px solid var(--b-1);
}

.format-card {
  background: var(--card);
  padding: 40px 32px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  transition: background 0.4s ease;
  position: relative;
}

.format-card:hover { background: var(--elevated); }

/* Top indicator line */
.format-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(to right, var(--signal), transparent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.5s var(--ease);
}
.format-card:hover::before { transform: scaleX(1); }

.format-card.featured::before {
  transform: scaleX(1);
  background: linear-gradient(to right, var(--signal-mid), var(--signal), transparent);
}

.format-icon {
  font-family: var(--mono);
  font-size: 7px;
  letter-spacing: 0.28em;
  color: var(--signal-mid);
  text-transform: uppercase;
  display: flex;
  align-items: center;
  gap: 8px;
}

.format-icon::before {
  content: '';
  display: block;
  width: 16px; height: 1px;
  background: var(--signal-mid);
}

.format-card h3 {
  font-family: var(--display);
  font-size: clamp(18px, 1.8vw, 24px);
  font-weight: 500;
  color: var(--cold);
  line-height: 1.2;
}

.format-card p {
  color: var(--text-300);
  font-size: 13px;
  line-height: 1.7;
  flex: 1;
}

.format-price {
  font-family: var(--mono);
  font-size: 8px;
  letter-spacing: 0.18em;
  color: var(--text-300);
  text-transform: uppercase;
  padding-top: 16px;
  border-top: 1px solid var(--b-1);
}

/* ============================================
   AUDIO SPOTLIGHT — one powerful source of light
   ============================================ */
.audio-spotlight {
  padding: var(--py-section) 0;
  position: relative;
  overflow: hidden;
}

/* Single point light source, right side */
.audio-spotlight::after {
  content: '';
  position: absolute;
  right: -100px; top: 50%;
  transform: translateY(-50%);
  width: 700px; height: 700px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(26,79,138,0.1) 0%, transparent 65%);
  filter: blur(80px);
  pointer-events: none;
}

.audio-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(60px, 10vw, 140px);
  align-items: center;
}

.audio-content h2 { margin-bottom: 28px; }
.audio-content p {
  color: var(--text-200);
  margin-bottom: 36px;
  line-height: 1.85;
  font-size: clamp(14px, 1.5vw, 16px);
}

.audio-exclusive {
  font-family: var(--mono);
  font-size: 7px;
  letter-spacing: 0.2em;
  color: var(--text-300);
  padding-top: 28px;
  border-top: 1px solid var(--b-1);
  text-transform: uppercase;
  display: flex;
  align-items: center;
  gap: 12px;
}
.audio-exclusive::before { content: '—'; color: var(--signal-mid); }

/* Audio Player — system terminal aesthetic */
.audio-player {
  background: var(--card);
  border: 1px solid var(--b-2);
  border-radius: 2px;
  padding: 40px;
  position: relative;
  overflow: hidden;
}

/* Scanline top border */
.audio-player::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(to right, transparent, var(--signal-mid), transparent);
}

.ap-label {
  font-family: var(--mono);
  font-size: 7px;
  letter-spacing: 0.3em;
  color: var(--signal-mid);
  text-transform: uppercase;
  margin-bottom: 10px;
  position: relative;
  display: flex;
  align-items: center;
  gap: 10px;
}
.ap-label::before { content: '▶'; font-size: 6px; }

.ap-title {
  font-family: var(--display);
  font-size: 24px;
  font-weight: 500;
  color: var(--cold);
  margin-bottom: 4px;
  position: relative;
}

.ap-author {
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.12em;
  color: var(--text-300);
  margin-bottom: 32px;
  position: relative;
}

/* Waveform */
.ap-waveform {
  height: 56px;
  display: flex;
  align-items: center;
  gap: 2px;
  margin-bottom: 20px;
  overflow: hidden;
  position: relative;
}

.ap-waveform-bar {
  flex: 1;
  background: var(--b-2);
  border-radius: 1px;
  transform-origin: center;
}

/* Progress */
.ap-progress {
  height: 1px;
  background: var(--b-2);
  margin-bottom: 10px;
  position: relative;
  cursor: pointer;
}

.ap-progress-fill {
  height: 100%;
  width: 28%;
  background: var(--signal-mid);
  position: relative;
}
.ap-progress-fill::after {
  content: '';
  position: absolute;
  right: -3px; top: 50%;
  transform: translateY(-50%);
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--cold);
  box-shadow: 0 0 6px rgba(40,104,176,0.6);
}

.ap-time {
  display: flex;
  justify-content: space-between;
  font-family: var(--mono);
  font-size: 8px;
  color: var(--text-300);
  margin-bottom: 28px;
}

.ap-controls {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 24px;
}

.ap-btn {
  color: var(--text-200);
  cursor: pointer;
  transition: color 0.2s ease;
  font-size: 16px;
  background: none;
  border: none;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 8px;
  width: 36px; height: 36px;
}
.ap-btn:hover { color: var(--cold); }

.ap-btn-play {
  width: 48px; height: 48px;
  border-radius: 50%;
  background: var(--signal);
  color: var(--cold);
  border: none;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 14px;
  transition: background 0.3s ease, box-shadow 0.3s ease;
}
.ap-btn-play:hover {
  background: var(--signal-mid);
  box-shadow: 0 0 20px rgba(26,79,138,0.5), 0 0 40px rgba(26,79,138,0.2);
}

/* ============================================
   WHY READERS — data table, Ex Machina UI
   ============================================ */
.why-readers {
  padding: var(--py-section) 0;
  background: var(--deep);
}

.reader-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 0;
  border: 1px solid var(--b-1);
  margin-top: clamp(52px, 8vw, 96px);
}

.reader-card {
  padding: 40px 28px;
  position: relative;
  border-right: 1px solid var(--b-1);
  transition: background 0.4s ease;
}

.reader-card:last-child { border-right: none; }
.reader-card:hover { background: var(--elevated); }

.reader-card::after {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: var(--signal);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.5s var(--ease);
}
.reader-card:hover::after { transform: scaleX(1); }

.reader-num {
  font-family: var(--mono);
  font-size: 7px;
  letter-spacing: 0.28em;
  color: var(--signal-mid);
  margin-bottom: 20px;
}

.reader-card h4 {
  font-family: var(--display);
  font-size: 18px;
  font-weight: 500;
  color: var(--cold);
  margin-bottom: 14px;
  line-height: 1.25;
}

.reader-card p {
  font-size: 12px;
  color: var(--text-300);
  line-height: 1.7;
}

/* ============================================
   EXCERPT — transmission aesthetic
   ============================================ */
.excerpt { padding: var(--py-section) 0; }

.excerpt-inner {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 100px;
  align-items: start;
}

.excerpt-label { padding-top: 8px; }
.excerpt-label .eyebrow { margin-bottom: 24px; }

.excerpt-chapter {
  font-family: var(--display);
  font-size: 80px;
  font-weight: 700;
  color: var(--b-2);
  line-height: 1;
  letter-spacing: -0.04em;
}

.excerpt-content {
  border-left: 1px solid var(--b-2);
  padding-left: 60px;
}

/* Transmission header */
.excerpt-header {
  font-family: var(--mono);
  font-size: 7px;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--text-400);
  margin-bottom: 32px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--b-1);
  display: flex;
  justify-content: space-between;
}

.excerpt-text {
  font-family: var(--display);
  font-size: clamp(18px, 2.2vw, 25px);
  line-height: 1.85;
  color: var(--text-200);
  margin-bottom: 44px;
  font-style: italic;
}

.excerpt-text strong { color: var(--cold); font-style: normal; }

/* ============================================
   REVIEWS
   ============================================ */
.reviews {
  padding: var(--py-section) 0;
  background: var(--deep);
}

.reviews-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--b-1);
  border: 1px solid var(--b-1);
  margin-top: clamp(52px, 8vw, 96px);
}

.review-card {
  background: var(--card);
  padding: 44px 36px;
  position: relative;
  overflow: hidden;
}

.review-card::before {
  content: '\201C';
  position: absolute;
  top: 8px; left: 24px;
  font-family: var(--display);
  font-size: 100px;
  line-height: 1;
  color: var(--b-1);
  pointer-events: none;
}

.review-text {
  font-family: var(--display);
  font-size: 17px;
  font-style: italic;
  color: var(--text-200);
  line-height: 1.8;
  margin-bottom: 28px;
  padding-top: 20px;
  position: relative;
}

.review-attribution {
  font-family: var(--mono);
  font-size: 7px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--text-300);
  display: flex;
  align-items: center;
  gap: 10px;
}
.review-attribution::before { content: '—'; color: var(--signal-mid); }

.reviews-placeholder-note {
  margin-top: 28px;
  font-family: var(--mono);
  font-size: 7px;
  letter-spacing: 0.16em;
  color: var(--text-400);
  text-align: center;
  text-transform: uppercase;
}

/* ============================================
   SIGNAL EMAIL CAPTURE — void + single light
   ============================================ */
.signal-section {
  padding: var(--py-section) 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.signal-section::before {
  content: '';
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  width: 1000px; height: 1000px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(26,79,138,0.09) 0%, transparent 60%);
  pointer-events: none;
}

.signal-section h2 { margin-bottom: 16px; }
.signal-section .lead {
  margin-bottom: 52px;
  max-width: 400px;
  margin-left: auto;
  margin-right: auto;
}

.signal-form {
  display: flex;
  gap: 0;
  max-width: 460px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

.signal-input {
  flex: 1;
  background: var(--card);
  border: 1px solid var(--b-2);
  border-right: none;
  border-radius: 1px 0 0 1px;
  padding: 16px 24px;
  color: var(--text-100);
  font-family: var(--body);
  font-size: 14px;
  transition: border-color 0.3s ease;
}
.signal-input::placeholder { color: var(--text-400); }
.signal-input:focus { border-color: var(--signal-mid); }

.signal-btn {
  background: var(--signal);
  color: var(--cold);
  border: 1px solid var(--signal);
  border-radius: 0 1px 1px 0;
  padding: 16px 28px;
  font-family: var(--mono);
  font-size: 8px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  cursor: pointer;
  white-space: nowrap;
  transition: background 0.3s ease;
}
.signal-btn:hover { background: var(--signal-mid); }

.signal-note {
  margin-top: 16px;
  font-family: var(--mono);
  font-size: 7px;
  letter-spacing: 0.14em;
  color: var(--text-400);
  position: relative;
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
  padding: 90px var(--px-c) 44px;
  background: var(--void);
  border-top: 1px solid var(--b-1);
}

.footer-top {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1fr;
  gap: var(--gap);
  margin-bottom: 72px;
}

.footer-logo {
  font-family: var(--display);
  font-size: 28px;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--cold);
  margin-bottom: 4px;
}

.footer-tagline {
  font-family: var(--mono);
  font-size: 7px;
  letter-spacing: 0.22em;
  color: var(--text-400);
  text-transform: uppercase;
  margin-bottom: 22px;
}

.footer-desc {
  font-size: 13px;
  color: var(--text-300);
  line-height: 1.8;
  max-width: 260px;
}

.footer-col-title {
  font-family: var(--mono);
  font-size: 7px;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--steel);
  margin-bottom: 22px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.footer-col-title::before { content: '—'; color: var(--signal-mid); font-size: 8px; }

.footer-links { display: flex; flex-direction: column; gap: 13px; }
.footer-link {
  font-size: 13px;
  color: var(--text-300);
  transition: color 0.3s ease;
}
.footer-link:hover { color: var(--text-100); }

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 28px;
  border-top: 1px solid var(--b-1);
  gap: 24px;
  flex-wrap: wrap;
}

.footer-copyright {
  font-family: var(--mono);
  font-size: 7px;
  letter-spacing: 0.12em;
  color: var(--text-400);
}

.footer-legal { display: flex; gap: 24px; }
.footer-legal a {
  font-family: var(--mono);
  font-size: 7px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-400);
  transition: color 0.3s ease;
}
.footer-legal a:hover { color: var(--text-300); }

/* ============================================
   PAGE HERO (sub-pages)
   ============================================ */
.page-hero {
  padding: clamp(150px, 16vw, 220px) var(--px-c) clamp(60px, 8vw, 100px);
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--b-1);
}

.page-hero-orb {
  position: absolute;
  width: 700px; height: 700px;
  border-radius: 50%;
  background: radial-gradient(circle, var(--glow-1) 0%, transparent 70%);
  filter: blur(100px);
  pointer-events: none;
}

/* ============================================
   BOOK PAGE
   ============================================ */
.book-detail {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 90px;
  align-items: start;
}

.book-cover-lg { position: sticky; top: 110px; }
.book-cover-lg .book-cover-mock {
  width: 100%;
  height: auto;
  aspect-ratio: 2/3;
  border-radius: 2px 14px 14px 2px;
}
.book-cover-lg .book-cover-title { font-size: clamp(40px, 4.5vw, 60px); }

.book-genre-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 32px; }
.genre-tag {
  font-family: var(--mono);
  font-size: 7px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--signal-mid);
  background: rgba(26,79,138,0.07);
  border: 1px solid rgba(26,79,138,0.18);
  padding: 6px 12px;
  border-radius: 1px;
}

.book-synopsis {
  font-size: clamp(13px, 1.5vw, 16px);
  color: var(--text-200);
  line-height: 1.9;
  margin-bottom: 24px;
}

.book-buy-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--b-1);
  border: 1px solid var(--b-1);
  margin: 40px 0;
}

.buy-card {
  background: var(--card);
  padding: 28px 24px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  transition: background 0.3s ease;
  text-decoration: none;
}
.buy-card:hover { background: var(--elevated); }
.buy-card.primary { border-top: 1px solid var(--signal); }

.buy-card-label {
  font-family: var(--mono);
  font-size: 7px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--signal-mid);
  display: flex;
  align-items: center;
  gap: 8px;
}
.buy-card-label::before { content: '—'; }

.buy-card h4 {
  font-family: var(--body);
  font-size: 14px;
  font-weight: 600;
  color: var(--cold);
}

.buy-card p { font-size: 12px; color: var(--text-300); flex: 1; line-height: 1.65; }

.buy-card .arrow {
  font-size: 16px;
  color: var(--text-300);
  margin-top: 4px;
  transition: transform 0.3s var(--ease), color 0.3s ease;
}
.buy-card:hover .arrow { transform: translateX(4px); color: var(--signal-mid); }

/* ============================================
   AUDIO PAGE
   ============================================ */
.audio-page-player {
  background: var(--card);
  border: 1px solid var(--b-2);
  border-radius: 2px;
  padding: 52px;
  max-width: 720px;
  margin: 0 auto 90px;
  position: relative;
  overflow: hidden;
}

.audio-page-player::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(to right, transparent, var(--signal-mid), transparent);
}

.audio-features {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--b-1);
  border: 1px solid var(--b-1);
  margin: 80px 0;
}

.audio-feature {
  padding: 36px 28px;
  background: var(--card);
  transition: background 0.3s ease;
}
.audio-feature:hover { background: var(--elevated); }

.audio-feature-icon {
  font-family: var(--mono);
  font-size: 7px;
  letter-spacing: 0.24em;
  color: var(--signal-mid);
  margin-bottom: 18px;
  text-transform: uppercase;
  display: flex;
  align-items: center;
  gap: 10px;
}
.audio-feature-icon::before { content: '—'; }

.audio-feature h4 {
  font-family: var(--body);
  font-size: 15px;
  font-weight: 600;
  color: var(--cold);
  margin-bottom: 12px;
}

.audio-feature p { font-size: 13px; color: var(--text-300); line-height: 1.7; }

/* FAQ */
.faq-list { max-width: 720px; margin: 0 auto; }
.faq-item { border-bottom: 1px solid var(--b-1); }

.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 26px 0;
  font-family: var(--body);
  font-size: 15px;
  font-weight: 400;
  color: var(--text-100);
  cursor: pointer;
  text-align: left;
  background: none;
  border: none;
  transition: color 0.3s ease;
  gap: 24px;
}
.faq-question:hover { color: var(--cold); }

.faq-icon {
  width: 20px; height: 20px;
  border: 1px solid var(--b-3);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  color: var(--text-300);
  flex-shrink: 0;
  transition: transform 0.3s ease, border-color 0.3s ease, color 0.3s ease;
}
.faq-item.open .faq-icon {
  transform: rotate(45deg);
  border-color: var(--signal-mid);
  color: var(--signal-mid);
}

.faq-answer { max-height: 0; overflow: hidden; transition: max-height 0.45s var(--ease); }
.faq-answer-inner {
  padding-bottom: 26px;
  font-size: 14px;
  color: var(--text-200);
  line-height: 1.82;
}
.faq-item.open .faq-answer { max-height: 300px; }

/* ============================================
   AUTHOR PAGE
   ============================================ */
.author-layout {
  display: grid;
  grid-template-columns: 1fr 1.8fr;
  gap: 110px;
  align-items: start;
}

.author-portrait { position: sticky; top: 110px; }

.author-img-wrap {
  aspect-ratio: 3/4;
  background: var(--elevated);
  border: 1px solid var(--b-2);
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}

.author-img-wrap::after {
  content: '';
  position: absolute; inset: 0;
  background: linear-gradient(to top, rgba(3,6,9,0.8), transparent 50%);
}

.author-img-placeholder {
  font-family: var(--mono);
  font-size: 7px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--text-400);
}

.author-content h2 { margin-bottom: 8px; }

.author-pseudonym-note {
  font-family: var(--mono);
  font-size: 7px;
  letter-spacing: 0.2em;
  color: var(--text-400);
  margin-bottom: 36px;
  text-transform: uppercase;
  display: flex;
  align-items: center;
  gap: 10px;
}
.author-pseudonym-note::before { content: '—'; color: var(--signal-mid); }

.author-bio {
  font-size: clamp(14px, 1.5vw, 17px);
  color: var(--text-200);
  line-height: 1.9;
  margin-bottom: 32px;
}

.author-block {
  padding: 44px 0;
  border-top: 1px solid var(--b-1);
}

.author-block h3 { font-size: 26px; margin-bottom: 24px; }
.author-block p { color: var(--text-200); line-height: 1.9; margin-bottom: 16px; font-size: clamp(13px, 1.4vw, 16px); }

.trilogy-card {
  background: var(--card);
  border: 1px solid var(--b-2);
  border-top: 1px solid var(--signal);
  padding: 36px;
  margin-top: 40px;
}

.trilogy-card-label {
  font-family: var(--mono);
  font-size: 7px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--signal-mid);
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.trilogy-card-label::before { content: '—'; }

.trilogy-card p { font-size: 14px; color: var(--text-200); line-height: 1.82; }

/* ============================================
   SIGNAL LOG
   ============================================ */
.signal-log-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--b-1);
  border: 1px solid var(--b-1);
}

.signal-post {
  background: var(--card);
  padding: 40px;
  transition: background 0.3s ease;
  cursor: pointer;
  display: block;
  text-decoration: none;
  position: relative;
}

.signal-post::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: var(--signal);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.5s var(--ease);
}

.signal-post:hover { background: var(--elevated); }
.signal-post:hover::before { transform: scaleX(1); }

.signal-post.featured {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  background: var(--elevated);
}
.signal-post.featured::before { transform: scaleX(1); }

.post-meta {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 22px;
}

.post-date {
  font-family: var(--mono);
  font-size: 7px;
  letter-spacing: 0.18em;
  color: var(--text-400);
}

.post-tag {
  font-family: var(--mono);
  font-size: 6px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--signal-mid);
  background: rgba(26,79,138,0.08);
  border: 1px solid rgba(26,79,138,0.2);
  padding: 3px 8px;
}

.post-title {
  font-family: var(--display);
  font-size: clamp(20px, 2.2vw, 28px);
  font-weight: 300;
  color: var(--cold);
  margin-bottom: 16px;
  line-height: 1.2;
}

.post-excerpt { font-size: 13px; color: var(--text-300); line-height: 1.75; margin-bottom: 28px; }

.post-read-more {
  font-family: var(--mono);
  font-size: 7px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--signal-mid);
  display: flex;
  align-items: center;
  gap: 10px;
  transition: gap 0.3s ease;
}
.post-read-more::before { content: '→'; }
.signal-post:hover .post-read-more { gap: 16px; }

/* ============================================
   CONTACT PAGE
   ============================================ */
.contact-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 110px;
}

.contact-info h3 { margin-bottom: 22px; }
.contact-info p { color: var(--text-200); line-height: 1.85; margin-bottom: 32px; font-size: 15px; }

.contact-detail-row {
  display: flex;
  flex-direction: column;
  gap: 28px;
  padding-top: 36px;
  border-top: 1px solid var(--b-1);
}

.contact-detail-label {
  font-family: var(--mono);
  font-size: 7px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--steel);
  margin-bottom: 6px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.contact-detail-label::before { content: '—'; color: var(--signal-mid); }

.contact-detail-value { font-size: 14px; color: var(--text-200); }

.contact-form-wrap {
  background: var(--card);
  border: 1px solid var(--b-2);
  border-top: 1px solid var(--signal);
  padding: 52px;
}

.form-group { margin-bottom: 24px; }

.form-label {
  display: block;
  font-family: var(--mono);
  font-size: 7px;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--steel);
  margin-bottom: 10px;
}

.form-input,
.form-textarea,
.form-select {
  width: 100%;
  background: var(--elevated);
  border: 1px solid var(--b-2);
  border-radius: 1px;
  padding: 14px 18px;
  color: var(--text-100);
  font-family: var(--body);
  font-size: 14px;
  transition: border-color 0.3s ease;
  appearance: none;
  -webkit-appearance: none;
}
.form-input:focus,
.form-textarea:focus,
.form-select:focus { border-color: var(--signal-mid); outline: none; }
.form-input::placeholder,
.form-textarea::placeholder { color: var(--text-400); }
.form-textarea { min-height: 140px; resize: vertical; }

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 1200px) {
  .hero-inner { grid-template-columns: 1fr 220px; gap: 60px; }
  .author-layout { gap: 60px; }
  .contact-layout { gap: 60px; }
  .excerpt-inner { gap: 60px; }
}

@media (max-width: 1100px) {
  .formats-grid { grid-template-columns: repeat(2, 1fr); }
  .reader-grid  { grid-template-columns: repeat(3, 1fr); }
  .footer-top   { grid-template-columns: 1fr 1fr; gap: 48px; }
  .hook-inner   { grid-template-columns: 1fr; gap: 48px; }
  .hook::before { display: none; }
  .hook-poem span:nth-child(2) { padding-left: clamp(16px, 2vw, 32px); }
  .hook-poem span:nth-child(3) { padding-left: clamp(32px, 4vw, 64px); }
  .audio-inner  { gap: 48px; }
}

@media (max-width: 900px) {
  .hero-inner      { grid-template-columns: 1fr; }
  .hero-book       { display: none; }
  .hero-meta       { display: none; }
  .audio-inner     { grid-template-columns: 1fr; }
  .book-detail     { grid-template-columns: 1fr; }
  .book-cover-lg   { position: static; max-width: 260px; }
  .book-buy-grid   { grid-template-columns: 1fr 1fr; }
  .author-layout   { grid-template-columns: 1fr; gap: 48px; }
  .author-portrait { position: static; max-width: 320px; }
  .contact-layout  { grid-template-columns: 1fr; gap: 48px; }
  .excerpt-inner   { grid-template-columns: 1fr; gap: 32px; }
  .excerpt-content { border-left: none; padding-left: 0; border-top: 1px solid var(--b-2); padding-top: 32px; }
  .signal-log-grid { grid-template-columns: 1fr; }
  .signal-post.featured { grid-column: 1; grid-template-columns: 1fr; gap: 32px; }
  .audio-features  { grid-template-columns: 1fr; }
  .reviews-grid    { grid-template-columns: 1fr; }
  .audio-page-player { padding: 36px 28px; }
}

@media (max-width: 768px) {
  .nav-links { display: none; }
  .nav-links.mobile-open {
    display: flex;
    flex-direction: column;
    position: fixed;
    inset: 0;
    background: rgba(3,6,9,0.98);
    align-items: center;
    justify-content: center;
    gap: 36px;
    z-index: 99;
  }
  .nav-links.mobile-open .nav-link { font-size: 18px; letter-spacing: 0.12em; }
  .nav-toggle { display: flex; }
  .nav-cta    { display: none; }

  .hero-subtitle { font-size: 15px; }
  .hero-actions  { flex-direction: column; align-items: flex-start; gap: 10px; }
  .hero-actions .btn { width: 100%; justify-content: center; }

  .formats-grid  { grid-template-columns: 1fr; gap: 1px; }
  .reader-grid   { grid-template-columns: 1fr 1fr; }
  .signal-form   { flex-direction: column; }
  .signal-input  {
    border-right: 1px solid var(--b-2);
    border-bottom: none;
    border-radius: 1px 1px 0 0;
  }
  .signal-btn    { border-radius: 0 0 1px 1px; width: 100%; }
  .footer-top    { grid-template-columns: 1fr; }
  .book-buy-grid { grid-template-columns: 1fr; }

  .contact-form-wrap { padding: 32px 24px; }
  .trilogy-card  { padding: 28px 20px; }
  .signal-post   { padding: 28px 24px; }
  .format-card   { padding: 32px 24px; }
  .reader-card   { padding: 28px 20px; }
}

@media (max-width: 480px) {
  .reader-grid   { grid-template-columns: 1fr; }
  .nav-links.mobile-open .nav-link { font-size: 20px; }
  .hero-actions .btn-outline { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
  [data-reveal] { opacity: 1; transform: none; }
}