/* Spiritual Food: In Due Season
   Crafted with tactile precision, multi-voice typography, and interactive product-stage architecture,
   combined with Apple fluid interface principles. */

:root {
  /* Fonts */
  --font-display: "Manrope", -apple-system, BlinkMacSystemFont, "SF Pro Display", system-ui, sans-serif;
  --sans: "DM Sans", "Inter", -apple-system, BlinkMacSystemFont, "SF Pro Text", system-ui, sans-serif;
  --font-ui: var(--sans);
  --serif: "Newsreader", "New York", Georgia, "Times New Roman", serif;
  --mono: "JetBrains Mono", ui-monospace, "SF Mono", Menlo, monospace;
  --hand: "Caveat", cursive;

  /* Motion curves */
  --ease-out-soft: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --landing-space: clamp(88px, 10vw, 148px);

  /* Default Theme: Lamplight Dark */
  --black: #090807;
  --ink: #0f0d0b;
  --surface: #151310;
  --surface-elevated: #1c1915;
  --surface-glass: rgba(24, 21, 17, 0.76);
  --tile: #14120f;
  --line: rgba(255, 244, 218, 0.09);
  --line-strong: rgba(255, 244, 218, 0.16);
  --specular: rgba(255, 250, 240, 0.09);
  --paper: #f6f0e4;
  --paper-surface: #fffdf8;
  --paper-line: #e4d9c5;
  --gold: #dfb96c;
  --gold-bright: #f3d99f;
  --gold-deep: #8b651b;
  --gold-glow: rgba(223, 185, 108, 0.14);
  --gold-subtle: rgba(223, 185, 108, 0.1);
  --text: #f6f4ef;
  --text-soft: #d1cbc0;
  --grey: #9e978c;
  --grey-2: #b5aea2;
  --hero-muted: #c2ad82;
  --text-on-paper: #191714;
  --grey-on-paper: #524d45;
  --focus: #dfb96c;
  --shadow-card: 0 20px 56px rgba(0, 0, 0, 0.48), inset 0 1px 0 rgba(255, 255, 255, 0.08);
  --shadow-float: 0 24px 60px rgba(0, 0, 0, 0.65), inset 0 1px 0 rgba(255, 255, 255, 0.1);
  color-scheme: dark;
}

:root[data-theme="light"] {
  --black: #faf6ee;
  --ink: #f3ede0;
  --surface: #ffffff;
  --surface-elevated: #fffdf9;
  --surface-glass: rgba(250, 246, 238, 0.82);
  --tile: #ffffff;
  --line: rgba(28, 24, 18, 0.12);
  --line-strong: rgba(28, 24, 18, 0.2);
  --specular: rgba(255, 255, 255, 0.85);
  --gold: #855c12;
  --gold-bright: #a8761b;
  --gold-deep: #6b490b;
  --gold-glow: rgba(181, 131, 34, 0.11);
  --gold-subtle: rgba(181, 131, 34, 0.1);
  --text: #161412;
  --text-soft: #3d3831;
  --grey: #5c554b;
  --grey-2: #4a443c;
  --hero-muted: #786138;
  --focus: #8c6316;
  --shadow-card: 0 16px 40px -12px rgba(32, 24, 12, 0.09), 0 2px 6px rgba(32, 24, 12, 0.04), inset 0 1px 0 #ffffff;
  --shadow-float: 0 24px 54px -12px rgba(32, 24, 12, 0.16), 0 4px 12px rgba(32, 24, 12, 0.06);
  color-scheme: light;
}

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 76px;
  background: var(--black);
  color: var(--text);
  overflow-x: clip;
  max-width: 100%;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}

@media (prefers-reduced-motion: no-preference) {
  html { transition: background-color 0.35s var(--ease-out-soft), color 0.35s var(--ease-out-soft); }
}

body {
  margin: 0;
  background: var(--black);
  color: var(--text);
  font: 400 17px/1.55 var(--sans);
  letter-spacing: -0.014em;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: clip;
}

img, video, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }

:focus-visible {
  outline: 2.5px solid var(--focus);
  outline-offset: 3px;
  border-radius: 6px;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.wrap {
  width: min(100% - clamp(32px, 6vw, 88px), 1160px);
  margin-inline: auto;
}

.narrow { max-width: 740px; }

/* ---------- Typography ---------- */
h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 700;
  margin: 0;
  text-wrap: balance;
  color: var(--text);
}

h1 {
  font-size: clamp(42px, 5.4vw, 76px);
  line-height: 1.05;
  letter-spacing: -0.055em;
  font-weight: 700;
}

h2 {
  font-size: clamp(32px, 3.9vw, 54px);
  line-height: 1.1;
  letter-spacing: -0.045em;
  font-weight: 700;
}

h2.big {
  font-size: clamp(38px, 5.2vw, 68px);
  line-height: 1.06;
  letter-spacing: -0.05em;
}

h3 {
  font-size: clamp(21px, 2vw, 27px);
  line-height: 1.2;
  letter-spacing: -0.035em;
  font-weight: 600;
}

p { margin: 0 0 16px; }

.dim, .muted-span { color: var(--hero-muted); }

.gold-text {
  background: linear-gradient(105deg, var(--gold-bright) 0%, var(--gold) 48%, #b8893a 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
:root[data-theme="light"] .gold-text {
  background: linear-gradient(105deg, #6e4b0c 0%, #9e711b 52%, #7a5510 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-family: var(--font-ui);
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--gold);
  margin: 0 0 12px;
}

.eyebrow::before {
  content: "";
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--gold);
  opacity: 0.9;
}

.ref {
  font-family: var(--font-ui);
  font-size: 13px;
  font-weight: 600;
  color: var(--gold);
  letter-spacing: -0.01em;
  font-variant-numeric: tabular-nums;
}

strong { color: var(--text); font-weight: 600; }

/* ---------- Global Header (Modern Sticky Architectural Glass Navbar) ---------- */
.globalnav, .top {
  position: sticky;
  top: 0;
  z-index: 60;
  height: 60px;
  background: rgba(9, 8, 7, 0.72);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid var(--line);
  transition: background-color 0.25s var(--ease-out-soft), border-color 0.25s var(--ease-out-soft);
}

:root[data-theme="light"] .globalnav,
:root[data-theme="light"] .top {
  background: rgba(250, 246, 238, 0.82);
}

.globalnav .wrap, .top .wrap {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-size: 16.5px;
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--text);
  min-height: 40px;
  flex-shrink: 0;
}

.brand img { width: 26px; height: 26px; border-radius: 7px; }
.mark { width: 26px; height: 26px; flex-shrink: 0; }
.mark path { fill: var(--gold); }

/* Center section links — clean, understated, zero heavy pill clutter */
.nav-chapters {
  display: flex;
  align-items: center;
  gap: 4px;
  font-family: var(--font-ui);
  font-size: 13.5px;
  font-weight: 500;
}

.nav-chapters a, .top nav a {
  position: relative;
  display: inline-flex;
  align-items: center;
  min-height: 36px;
  padding: 0 12px;
  border-radius: 8px;
  color: var(--text-soft);
  transition: color 0.18s var(--ease-out-soft), background-color 0.18s var(--ease-out-soft);
}

.nav-chapters a:hover, .top nav a:hover, .top nav a[aria-current="page"] {
  color: var(--text);
}

/* Subtle active hairline indicator instead of dated chunky pill */
.nav-chapters a.is-on {
  color: var(--text);
  font-weight: 600;
}

.nav-chapters a.is-on::after {
  content: "";
  position: absolute;
  left: 12px;
  right: 12px;
  bottom: 4px;
  height: 1.5px;
  border-radius: 2px;
  background: var(--gold);
}

/* Right utility cluster */
.nav-utilities, .top nav {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-shrink: 0;
}

.nav-util-link {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  padding: 0 10px;
  border-radius: 8px;
  font-family: var(--font-ui);
  font-size: 13px;
  font-weight: 500;
  color: var(--grey-2);
  transition: color 0.18s;
}

.nav-util-link:hover {
  color: var(--text);
}

.theme-toggle {
  position: relative;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.04);
  color: var(--text-soft);
  display: grid;
  place-items: center;
  margin-left: 4px;
  transition: background-color 0.2s, border-color 0.2s, color 0.2s, transform 0.15s;
  flex-shrink: 0;
}

/* Expand touch target to >= 44x44px per UI/UX Pro Max touch target standard */
.theme-toggle::after {
  content: "";
  position: absolute;
  inset: -5px;
}

:root[data-theme="light"] .theme-toggle {
  background: rgba(0, 0, 0, 0.04);
}

.theme-toggle:hover {
  background: var(--surface-elevated);
  border-color: var(--line-strong);
  color: var(--text);
}

.theme-toggle:active { transform: scale(0.95); }
.theme-toggle svg { grid-area: 1 / 1; width: 15px; height: 15px; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; transition: opacity 0.25s, transform 0.35s var(--ease-out-soft); }
.theme-sun, .icon-sun { opacity: 1; transform: none; }
.theme-moon, .icon-moon { opacity: 0; transform: rotate(-35deg) scale(0.6); }
:root[data-theme="light"] .theme-sun, :root[data-theme="light"] .icon-sun { opacity: 0; transform: rotate(35deg) scale(0.6); }
:root[data-theme="light"] .theme-moon, :root[data-theme="light"] .icon-moon { opacity: 1; transform: none; }

@media (max-width: 860px) {
  .hide-mobile { display: none !important; }
  .nav-chapters { gap: 2px; }
  .nav-chapters a, .nav-util-link { padding: 0 8px; font-size: 13px; }
}

/* ---------- Hero Section (Product Stage + Editorial Polish) ---------- */
.hero {
  position: relative;
  isolation: isolate;
  padding-block: clamp(28px, 4vw, 52px) clamp(56px, 7vw, 96px);
  overflow: hidden;
}

.hero-intro {
  position: relative;
  z-index: 3;
  text-align: center;
  max-width: 780px;
  margin-inline: auto;
}

/* Shimmering pill badge */
.hero-badge {
  position: relative;
  isolation: isolate;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 4px 14px 4px 5px;
  border-radius: 999px;
  border: 1px solid var(--line-strong);
  background: var(--surface);
  color: var(--text-soft);
  font-size: 13px;
  font-weight: 500;
  line-height: 24px;
  margin: 0 0 24px;
  overflow: hidden;
  box-shadow: inset 0 1px 0 var(--specular);
}

.hero-badge .badge-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--gold-subtle);
  color: var(--gold);
  border: 1px solid rgba(223, 185, 108, 0.25);
  border-radius: 999px;
  padding: 1px 10px;
  font-weight: 600;
  font-size: 12px;
}

.hero-badge .badge-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--gold);
  animation: pulseDot 2.2s ease-in-out infinite;
}

@keyframes pulseDot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.45; transform: scale(0.85); }
}

.hero-badge::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(105deg, transparent 35%, rgba(223, 185, 108, 0.18) 50%, transparent 65%);
  background-size: 250% 100%;
  background-position: 150% 0;
}

@media (prefers-reduced-motion: no-preference) {
  .hero-badge::after { animation: badgeShimmer 6s ease-in-out infinite; }
}

@keyframes badgeShimmer {
  0% { background-position: 150% 0; }
  45%, 100% { background-position: -50% 0; }
}

.hero h1 {
  margin: 0 auto;
  font-size: clamp(44px, 5.8vw, 80px);
  letter-spacing: -0.055em;
  line-height: 1.04;
}

.hero h1 span {
  display: block;
  color: var(--hero-muted);
}

.hero h1 span.serif-hero {
  font-family: var(--serif);
  font-style: italic;
  font-weight: 400;
  letter-spacing: -0.02em;
  line-height: 1.08;
  padding-bottom: 0.04em;
}

.hero-lede {
  max-width: 580px;
  margin: 22px auto 0;
  font-size: clamp(17px, 1.8vw, 19.5px);
  line-height: 1.58;
  color: var(--text-soft);
  font-weight: 400;
}

.hero-actions {
  margin-top: 30px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 14px;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-height: 52px;
  padding: 0 26px;
  border-radius: 999px;
  background: var(--text);
  color: var(--black);
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: -0.02em;
  box-shadow: 0 12px 28px rgba(0, 0, 0, 0.25);
  transition: transform 0.15s var(--ease-out-soft), background-color 0.2s, box-shadow 0.2s;
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 16px 34px rgba(0, 0, 0, 0.32);
}

.btn-primary:active { transform: scale(0.97); }
.btn-primary svg {
  width: 18px;
  height: 18px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
  flex-shrink: 0;
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 52px;
  padding: 0 22px;
  border-radius: 999px;
  border: 1px solid var(--line-strong);
  background: var(--surface);
  color: var(--text);
  font-size: 15px;
  font-weight: 600;
  box-shadow: inset 0 1px 0 var(--specular);
  transition: background-color 0.2s, border-color 0.2s, transform 0.15s;
}

.btn-secondary:hover {
  background: var(--surface-elevated);
  border-color: var(--gold);
}
.btn-secondary:active { transform: scale(0.97); }
.btn-secondary svg {
  width: 16px;
  height: 16px;
  color: var(--gold);
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
  flex-shrink: 0;
}

.hero-meta {
  margin-top: 18px;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px 20px;
  font-size: 13px;
  color: var(--grey);
}

.hero-meta span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.hero-meta i {
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--gold);
}

/* Atmospheric Hero Stage */
.hero-stage {
  position: relative;
  margin-top: clamp(28px, 4vw, 44px);
  padding-block: 8px 24px;
}

.stage-sky {
  position: absolute;
  inset: -40px 0 -20px;
  z-index: -1;
  pointer-events: none;
  background:
    radial-gradient(54% 48% at 50% 42%, rgba(223, 185, 108, 0.22) 0%, rgba(168, 118, 42, 0.08) 52%, transparent 80%),
    radial-gradient(36% 36% at 22% 58%, rgba(217, 180, 106, 0.11) 0%, transparent 70%),
    radial-gradient(36% 36% at 78% 55%, rgba(217, 180, 106, 0.11) 0%, transparent 70%);
  -webkit-mask-image: linear-gradient(transparent, #000 18% 84%, transparent);
  mask-image: linear-gradient(transparent, #000 18% 84%, transparent);
}

/* Interactive Studio Toolbar (Visible on Desktop & Mobile) */
.hero-stage-toolbar {
  display: flex;
  justify-content: center;
  margin-bottom: 22px;
  position: relative;
  z-index: 12;
}

.hero-device-tabs {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px;
  border-radius: 999px;
  background: var(--surface-glass);
  border: 1px solid var(--line-strong);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  backdrop-filter: saturate(180%) blur(20px);
  box-shadow: 0 10px 28px rgba(0, 0, 0, 0.28), inset 0 1px 0 var(--specular);
}

.hero-device-tab {
  min-height: 34px;
  padding: 0 15px;
  border-radius: 999px;
  font-family: var(--font-ui);
  font-size: 13px;
  font-weight: 500;
  color: var(--text-soft);
  background: transparent;
  border: 1px solid transparent;
  transition: color 0.2s var(--ease-out-soft), background-color 0.2s var(--ease-out-soft), border-color 0.2s, box-shadow 0.2s;
}

.hero-device-tab:hover {
  color: var(--text);
}

.hero-device-tab.is-active {
  background: rgba(255, 255, 255, 0.14);
  color: var(--text);
  font-weight: 600;
  border-color: rgba(255, 255, 255, 0.22);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.28);
}

:root[data-theme="light"] .hero-device-tab.is-active {
  background: #ffffff;
  color: #161412;
  border-color: rgba(28, 24, 18, 0.12);
  box-shadow: 0 2px 8px rgba(32, 24, 12, 0.1);
}

.stage-composition {
  position: relative;
  max-width: 1120px;
  margin-inline: auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 24px;
}

/* The 3-device lineup in the center with distinct spatial zones & zero text occlusion */
.lineup {
  position: relative;
  aspect-ratio: 1.72;
  width: min(100%, 1060px);
  z-index: 2;
  isolation: isolate;
  margin: 0 auto;
}

/* Subtle studio floor plinth reflection */
.lineup::before {
  content: "";
  position: absolute;
  left: 8%;
  right: 8%;
  bottom: 0;
  height: 28px;
  border-radius: 50%;
  background: radial-gradient(50% 50% at 50% 50%, rgba(223, 185, 108, 0.18) 0%, rgba(0, 0, 0, 0.55) 65%, transparent 100%);
  filter: blur(10px);
  pointer-events: none;
  z-index: 0;
}

.lineup > div {
  position: absolute;
  transition:
    transform 0.55s var(--ease-out-expo),
    opacity 0.4s var(--ease-out-soft),
    left 0.55s var(--ease-out-expo),
    right 0.55s var(--ease-out-expo),
    width 0.55s var(--ease-out-expo),
    top 0.55s var(--ease-out-expo),
    bottom 0.55s var(--ease-out-expo);
}

.lineup img {
  transition: opacity 0.22s var(--ease-out-soft), transform 0.28s var(--ease-out-soft);
}

.lineup img.is-swapping {
  opacity: 0.35;
  transform: scale(0.985);
}

/* 1. Centerpiece: iPhone Duo Unfolded Spread */
.lineup-duo {
  left: 20.5%;
  width: 59%;
  top: 2.5%;
  z-index: 2;
  padding: 1.25%;
  border-radius: 26px;
  background: linear-gradient(165deg, #322d26 0%, #12100e 45%, #24201b 100%);
  transform: perspective(1400px) rotateX(3.5deg);
  box-shadow:
    inset 0 1.5px 0 rgba(255, 255, 255, 0.24),
    inset 0 0 0 1px rgba(255, 255, 255, 0.1),
    0 5px 0 #171411,
    0 6px 0 rgba(255, 255, 255, 0.08),
    0 34px 76px rgba(0, 0, 0, 0.72),
    0 12px 28px rgba(0, 0, 0, 0.45);
}

.lineup-duo::after {
  content: "";
  position: absolute;
  top: 1.5%;
  bottom: 1.5%;
  left: 50%;
  width: 3px;
  transform: translateX(-50%);
  background: linear-gradient(90deg, rgba(0,0,0,0.65), rgba(255,255,255,0.14) 50%, rgba(0,0,0,0.65));
  pointer-events: none;
}

.lineup-duo img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 2048 / 1440;
  border-radius: 18px;
}

/* 2. Left Flank: Tilted 3D iPhone (Framed cleanly beside Duo's left bezel) */
.lineup-phone {
  left: 0.5%;
  bottom: 4.5%;
  width: 20.5%;
  z-index: 5;
  padding: 0.95%;
  border-radius: 34px;
  background: linear-gradient(155deg, #3d372e 0%, #12100e 48%, #25211c 100%);
  transform: perspective(1100px) rotateY(15deg) rotateX(3deg) rotateZ(-1.8deg);
  transform-style: preserve-3d;
  box-shadow:
    inset 0 1.5px 0 rgba(255, 255, 255, 0.28),
    inset 0 0 0 1px rgba(255, 255, 255, 0.12),
    -3px 2px 0 #2b2620,
    -6px 4px 0 #1a1713,
    -7px 5px 0 rgba(255, 255, 255, 0.12),
    -18px 30px 54px rgba(0, 0, 0, 0.78);
}

.lineup-phone::after {
  content: "";
  position: absolute;
  inset: 1.05%;
  border-radius: 28px;
  background: linear-gradient(125deg, rgba(255, 255, 255, 0.14) 0%, rgba(255, 255, 255, 0.03) 34%, transparent 48%);
  pointer-events: none;
}

.lineup-phone img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 660 / 1434;
  border-radius: 28px;
}

/* 3. Right Flank: 3D Perspective Apple Watch */
.lineup-watch {
  right: 1.5%;
  bottom: 6.5%;
  width: 17.5%;
  z-index: 6;
  perspective: 950px;
}

.watch-hero-3d {
  transform: rotateY(-18deg) rotateX(7deg) rotateZ(2.5deg);
  transform-style: preserve-3d;
  transition: transform 0.55s var(--ease-out-expo);
}

.watch-hero-3d .watch-chassis {
  padding: 6.5%;
  box-shadow:
    inset 0 1.5px 1px rgba(255, 255, 255, 0.35),
    inset 0 -2px 3px rgba(0, 0, 0, 0.7),
    inset 0 0 0 1px rgba(255, 255, 255, 0.14),
    3px 2px 0 #3a332a,
    6px 4px 0 #26211b,
    9px 6px 0 #171410,
    10px 7px 0 rgba(255, 255, 255, 0.14),
    20px 32px 56px rgba(0, 0, 0, 0.82);
}

.watch-hero-3d .watch-strap {
  height: 26%;
}

/* Desktop Interactive Stage Modes (Duo / iPhone / Watch solo focus) */
@media (min-width: 760px) {
  .hero-stage[data-hero-device="duo"] .lineup-duo {
    left: 13%;
    width: 74%;
    top: 1%;
    transform: perspective(1400px) rotateX(2deg) scale(1.02);
    z-index: 8;
  }
  .hero-stage[data-hero-device="duo"] .lineup-phone,
  .hero-stage[data-hero-device="duo"] .lineup-watch {
    opacity: 0;
    pointer-events: none;
    transform: scale(0.88) translateY(18px);
  }

  .hero-stage[data-hero-device="iphone"] .lineup-phone {
    left: 37%;
    width: 26%;
    bottom: 2%;
    transform: perspective(1200px) rotateY(-6deg) rotateX(2deg) rotateZ(0.5deg);
    z-index: 8;
  }
  .hero-stage[data-hero-device="iphone"] .lineup-duo,
  .hero-stage[data-hero-device="iphone"] .lineup-watch {
    opacity: 0.14;
    filter: blur(2px);
    transform: scale(0.94);
    pointer-events: none;
  }

  .hero-stage[data-hero-device="watch"] .lineup-watch {
    right: 37%;
    width: 26%;
    bottom: 5%;
    z-index: 8;
  }
  .hero-stage[data-hero-device="watch"] .watch-hero-3d {
    transform: rotateY(-12deg) rotateX(5deg) rotateZ(1deg) scale(1.04);
  }
  .hero-stage[data-hero-device="watch"] .lineup-duo,
  .hero-stage[data-hero-device="watch"] .lineup-phone {
    opacity: 0.14;
    filter: blur(2px);
    transform: scale(0.94);
    pointer-events: none;
  }
}

/* Interactive Stage Callout Cards (3-Column Workflow Switcher) */
.stage-callouts {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  width: 100%;
  max-width: 1020px;
  margin: 0 auto;
  z-index: 10;
}

.stage-callout {
  width: 100%;
  padding: 0;
  text-align: left;
  background: none;
  border: 0;
  cursor: pointer;
  pointer-events: auto;
  display: flex;
}

.callout-card {
  width: 100%;
  background: var(--surface-glass);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 16px 18px;
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  backdrop-filter: blur(20px) saturate(180%);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2), inset 0 1px 0 var(--specular);
  transition: border-color 0.22s var(--ease-out-soft), background-color 0.22s var(--ease-out-soft), transform 0.22s var(--ease-out-soft), box-shadow 0.22s var(--ease-out-soft);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.stage-callout:hover .callout-card {
  border-color: var(--line-strong);
  background: var(--surface-elevated);
  transform: translateY(-2px);
}

.stage-callout.is-active .callout-card {
  border-color: var(--gold);
  background:
    radial-gradient(90% 90% at 50% 0%, var(--gold-glow), transparent 75%),
    var(--surface-elevated);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.32), 0 0 0 1px rgba(223, 185, 108, 0.28), inset 0 1px 0 var(--specular);
}

.callout-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 8px;
}

.callout-ref {
  font-family: var(--font-ui);
  font-size: 13.5px;
  font-weight: 600;
  color: var(--text);
  letter-spacing: -0.01em;
  font-variant-numeric: tabular-nums;
}

.callout-count {
  font-family: var(--font-ui);
  font-size: 12px;
  color: var(--gold);
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.callout-verse {
  font-family: var(--serif);
  font-size: 14px;
  line-height: 1.48;
  font-style: italic;
  color: var(--text-soft);
  margin: 0 0 10px;
}

.callout-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 5px;
  font-size: 12px;
  color: var(--grey);
  font-variant-numeric: tabular-nums;
}

.callout-meta .sep {
  opacity: 0.45;
}

.callout-action {
  color: var(--gold);
  font-weight: 500;
  font-size: 12px;
}

@media (max-width: 1180px) {
  .lineup { width: min(100%, 920px); }
}

@media (max-width: 900px) and (min-width: 760px) {
  .stage-callouts { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 10px; }
  .callout-card { padding: 13px 14px; }
}

/* ---------- Highlights & Metrics Strip ---------- */
.intro {
  padding-block: var(--landing-space);
  position: relative;
}

.intro-header {
  max-width: 780px;
}

.intro h2 {
  font-size: clamp(36px, 5.2vw, 64px);
  line-height: 1.06;
  letter-spacing: -0.05em;
}

.intro-text {
  margin-top: 24px;
  max-width: 640px;
  font-size: clamp(18px, 1.9vw, 21px);
  line-height: 1.55;
  color: var(--text-soft);
}

.stats {
  display: grid;
  gap: 18px;
  margin-top: clamp(44px, 6vw, 72px);
}

@media (min-width: 760px) {
  .stats { grid-template-columns: repeat(3, 1fr); }
}

.stat {
  position: relative;
  padding: 28px 30px;
  border-radius: 22px;
  background: var(--surface);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-card);
  overflow: hidden;
}

.stat::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: radial-gradient(circle at top left, var(--gold-glow), transparent 65%);
}

.stat b {
  position: relative;
  display: block;
  font-family: var(--font-display);
  font-size: clamp(52px, 6.2vw, 76px);
  line-height: 1;
  font-weight: 800;
  letter-spacing: -0.055em;
  background: linear-gradient(180deg, var(--gold-bright), var(--gold) 65%, #a77a2e);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  font-variant-numeric: tabular-nums;
}
:root[data-theme="light"] .stat b {
  background: linear-gradient(180deg, #724f0e, #a6761b 65%, #65450a);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.stat span {
  position: relative;
  display: block;
  margin-top: 12px;
  color: var(--text-soft);
  font-size: 16px;
  line-height: 1.45;
  font-weight: 500;
}

/* ---------- Interactive Bento Section ("How Spiritual Food Works") ---------- */
.bento-section {
  padding-block: var(--landing-space);
}

.section-intro, .bento-header {
  text-align: center;
  max-width: 680px;
  margin: 0 auto clamp(44px, 5vw, 64px);
}

.section-intro h2, .bento-header h2 {
  margin-top: 6px;
  margin-bottom: 14px;
}

.section-intro p.section-lede, .bento-header p.chapter-lede {
  margin: 18px auto 0;
  font-size: clamp(17px, 1.7vw, 19px);
  line-height: 1.55;
  color: var(--text-soft);
}

.bento-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.bento-tile {
  position: relative;
  isolation: isolate;
  border: 1px solid var(--line);
  background: var(--surface);
  border-radius: 24px;
  padding: clamp(24px, 3vw, 36px);
  display: flex;
  flex-direction: column;
  gap: 24px;
  overflow: hidden;
  box-shadow: var(--shadow-card);
}

.bento-tile::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.04) 0%, transparent 40%),
    radial-gradient(75% 60% at 50% 100%, var(--gold-glow), transparent 72%);
}

.bento-wide { grid-column: 1 / -1; }

.bento-caption, .bento-top {
  max-width: 640px;
}

.bento-tag {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--gold);
  margin-bottom: 10px;
}

.bento-tag .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--gold);
}

.bento-caption h3, .bento-top h3 {
  font-size: clamp(23px, 2.3vw, 29px);
  letter-spacing: -0.04em;
  margin-bottom: 8px;
}

.bento-top h3 .count {
  color: var(--gold);
  font-family: var(--mono);
}

.bento-caption p, .bento-top p {
  margin: 0 0 14px;
  font-size: 15.5px;
  line-height: 1.52;
  color: var(--text-soft);
}

/* Interactive Demo 1: Verse <-> Sermon Switcher inside Bento Wide Tile */
.verse-switcher {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 4px;
}

.verse-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 38px;
  padding: 6px 14px;
  border-radius: 999px;
  border: 1px solid var(--line-strong);
  background: var(--ink);
  color: var(--text-soft);
  font-size: 13px;
  font-weight: 600;
  transition: all 0.2s var(--ease-out-soft);
}

.verse-pill:hover {
  border-color: var(--gold);
  color: var(--text);
}

.verse-pill.is-active {
  background: var(--gold);
  color: #110e09;
  border-color: var(--gold);
  box-shadow: 0 6px 20px var(--gold-glow);
}

.verse-pill .pill-count {
  font-family: var(--mono);
  font-size: 11.5px;
  padding: 1px 7px;
  border-radius: 999px;
  background: rgba(0, 0, 0, 0.16);
  color: inherit;
}

.links-map {
  position: relative;
  display: grid;
  gap: 32px 72px;
  align-items: center;
  padding: 12px 0 4px;
}

@media (min-width: 860px) {
  .links-map { grid-template-columns: 0.92fr 1.08fr; }
}

.links-lines {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  overflow: visible;
  pointer-events: none;
}

.links-lines path {
  fill: none;
  stroke: var(--gold);
  stroke-width: 1.5;
  opacity: 0.6;
}

.links-verse {
  margin: 0;
  padding: 26px 28px;
  border-radius: 20px;
  background: var(--ink);
  border: 1px solid var(--line-strong);
  box-shadow: inset 0 1px 0 var(--specular), 0 16px 36px rgba(0, 0, 0, 0.25);
  position: relative;
  z-index: 1;
}

.links-verse-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 12px;
}

.links-verse-badge {
  font-family: var(--mono);
  font-size: 11.5px;
  padding: 3px 9px;
  border-radius: 999px;
  background: var(--gold-subtle);
  color: var(--gold);
  border: 1px solid rgba(223, 185, 108, 0.25);
}

.links-verse blockquote {
  margin: 8px 0 16px;
  font-family: var(--serif);
  font-size: clamp(20px, 2.2vw, 25px);
  line-height: 1.42;
  color: var(--text);
}

.verse-usages {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  border-top: 1px solid var(--line);
  padding-top: 12px;
  font-size: 12px;
  color: var(--text-soft);
}

.verse-usages span {
  padding: 3px 9px;
  border-radius: 7px;
  background: var(--surface);
  border: 1px solid var(--line);
}

.verse-usages b {
  font-family: var(--mono);
  color: var(--gold);
  margin-right: 3px;
}

.links-sermons {
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
  z-index: 1;
  background: var(--ink);
  border: 1px solid var(--line);
  border-radius: 18px;
  overflow: hidden;
}

.links-sermons li {
  padding: 11px 16px;
  border-bottom: 1px solid var(--line);
  font-size: 14.5px;
  display: flex;
  gap: 10px;
  align-items: center;
  transition: background-color 0.15s;
}

.links-sermons li:last-child { border-bottom: 0; }
.links-sermons li:hover { background: var(--surface-elevated); }

.links-sermons li .sermon-title,
.links-sermons li .stitle {
  font-weight: 500;
  color: var(--text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.links-sermons li .use-tag {
  margin-left: auto;
  font-size: 11px;
  font-weight: 600;
  padding: 2px 7px;
  border-radius: 6px;
  background: var(--surface);
  border: 1px solid var(--line);
  color: var(--text-soft);
  flex-shrink: 0;
}

.links-sermons li .para {
  color: var(--grey);
  font-family: var(--mono);
  font-size: 12px;
  font-variant-numeric: tabular-nums;
  flex-shrink: 0;
}

.links-sermons li.more {
  color: var(--grey);
  font-size: 13px;
  justify-content: space-between;
  background: rgba(223, 185, 108, 0.04);
}

/* Interactive Demo 2: Ask Mini-UI inside Bento Tile */
.ask-mini {
  background: var(--ink);
  border: 1px solid var(--line-strong);
  border-radius: 18px;
  padding: 18px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-top: auto;
}

.ask-prompts {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.ask-prompt-btn {
  font-size: 12px;
  font-weight: 600;
  padding: 6px 11px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--text-soft);
  transition: all 0.18s;
}

.ask-prompt-btn:hover { color: var(--text); border-color: var(--line-strong); }
.ask-prompt-btn.is-active {
  background: var(--gold-subtle);
  color: var(--gold);
  border-color: var(--gold);
}

.ask-answer-box {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 14px 16px;
}

.ask-answer-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--gold);
  margin-bottom: 8px;
}

.ask-answer-text {
  font-size: 14px;
  line-height: 1.52;
  color: var(--text);
  margin: 0 0 12px;
}

.ask-footnotes {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  border-top: 1px solid var(--line);
  padding-top: 10px;
}

.ask-fn, .cite-chip {
  font-family: var(--mono);
  font-size: 11px;
  padding: 3px 8px;
  border-radius: 6px;
  background: var(--ink);
  border: 1px solid var(--line);
  color: var(--gold);
}

/* Interactive Demo 3: Note Builder Mini-UI */
.note-mini {
  background: var(--ink);
  border: 1px solid var(--line-strong);
  border-radius: 18px;
  padding: 18px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: auto;
}

.note-mini-head, .note-card-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--line);
  padding-bottom: 10px;
}

.note-mini-head b, .note-card-title {
  font-family: var(--serif);
  font-size: 19px;
  font-weight: 500;
  margin: 0;
}

.note-mini-head span, .note-card-count {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--gold);
  background: var(--gold-subtle);
  padding: 2px 8px;
  border-radius: 999px;
}

.note-entries, .note-items {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.note-entry, .note-item {
  background: var(--surface);
  border: 1px solid var(--line);
  border-left: 2.5px solid var(--gold);
  border-radius: 10px;
  padding: 10px 12px;
  font-size: 13px;
  line-height: 1.45;
}

.note-entry b, .note-item-ref {
  display: flex;
  justify-content: space-between;
  font-family: var(--mono);
  font-size: 11px;
  color: var(--gold);
  margin-bottom: 4px;
}

.note-entry p, .note-item p {
  margin: 0;
  font-family: var(--serif);
  color: var(--text);
}

.note-add-bar, .note-actions-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  padding-top: 4px;
}

.note-add-btn {
  font-size: 11.5px;
  font-weight: 600;
  padding: 5px 10px;
  border-radius: 999px;
  border: 1px dashed var(--line-strong);
  color: var(--text-soft);
  transition: all 0.18s;
}

.note-add-btn:hover {
  border-style: solid;
  border-color: var(--gold);
  color: var(--gold);
  background: var(--gold-subtle);
}

.note-add-btn.is-added {
  border-style: solid;
  border-color: var(--line);
  opacity: 0.55;
  cursor: default;
}

@media (max-width: 820px) {
  .bento-grid { grid-template-columns: 1fr; }
}

/* ---------- Chapters (Read, Sermon, Ask) ---------- */
.chapter {
  padding-block: var(--landing-space);
  position: relative;
}

.chapter.light {
  background: var(--paper);
  color: var(--text-on-paper);
  border-top: 1px solid var(--paper-line);
  border-bottom: 1px solid var(--paper-line);
}

.chapter.light h1,
.chapter.light h2,
.chapter.light h3,
.chapter.light strong {
  color: var(--text-on-paper);
}

.chapter.light .eyebrow,
.chapter.light .ref {
  color: var(--gold-deep);
}

.chapter.light .eyebrow::before {
  background: var(--gold-deep);
  box-shadow: none;
}

.chapter-head {
  max-width: 720px;
  margin: 0 auto clamp(48px, 6vw, 72px);
  text-align: center;
}

.chapter-head h2 { margin-bottom: 18px; }

.chapter-lede {
  font-size: clamp(17.5px, 1.8vw, 20px);
  line-height: 1.55;
  color: var(--text-soft);
  margin: 0 auto;
  max-width: 36em;
}

.chapter.light .chapter-lede { color: var(--grey-on-paper); }

/* Studio Hardware Phone Frame with 3D Titanium Rail & Glass Glare */
.device-shot {
  display: flex;
  justify-content: center;
  position: relative;
  perspective: 1300px;
}

.phone {
  position: relative;
  width: 100%;
  max-width: 336px;
  margin: 0 auto;
  padding: 12px;
  border-radius: 56px;
  background: linear-gradient(155deg, #3c362e 0%, #14120f 45%, #28231d 100%);
  transform: rotateX(5deg) rotateY(-8deg) rotateZ(1deg);
  transform-style: preserve-3d;
  transition: transform 0.6s var(--ease-out-expo), box-shadow 0.6s var(--ease-out-expo);
  box-shadow:
    inset 0 1.5px 1px rgba(255, 255, 255, 0.32),
    inset 0 -2px 3px rgba(0, 0, 0, 0.7),
    inset 0 0 0 1.5px rgba(255, 255, 255, 0.12),
    4px 4px 0 #312b23,
    8px 8px 0 #1b1814,
    9px 9px 0 rgba(255, 255, 255, 0.12),
    24px 44px 88px -8px rgba(0, 0, 0, 0.68);
}

.split-grid:not(.flip) .phone {
  transform: rotateX(5deg) rotateY(12deg) rotateZ(-1.5deg);
  box-shadow:
    inset 0 1.5px 1px rgba(255, 255, 255, 0.32),
    inset 0 -2px 3px rgba(0, 0, 0, 0.7),
    inset 0 0 0 1.5px rgba(255, 255, 255, 0.12),
    -4px 4px 0 #312b23,
    -8px 8px 0 #1b1814,
    -9px 9px 0 rgba(255, 255, 255, 0.12),
    -24px 44px 88px -8px rgba(0, 0, 0, 0.72);
}

.split-grid.flip .phone {
  transform: rotateX(5deg) rotateY(-12deg) rotateZ(1.5deg);
}

.device-shot:hover .phone {
  transform: rotateX(2deg) rotateY(0deg) rotateZ(0deg) translateY(-6px);
}

/* Titanium side power/action button */
.phone::before {
  content: "";
  position: absolute;
  right: -4px;
  top: 24%;
  width: 4px;
  height: 68px;
  border-radius: 0 3px 3px 0;
  background: linear-gradient(180deg, #544b3e, #24201a, #433c31);
  box-shadow: 0 0 0 1px #14110e;
}

/* Screen glass reflection sweep */
.phone::after {
  content: "";
  position: absolute;
  inset: 12px;
  border-radius: 44px;
  pointer-events: none;
  background: linear-gradient(130deg, rgba(255, 255, 255, 0.14) 0%, rgba(255, 255, 255, 0.02) 34%, transparent 48%);
  box-shadow: inset 0 1px 1px rgba(255, 255, 255, 0.25);
}

.phone img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 660 / 1434;
  border-radius: 44px;
}

.chapter.light .phone {
  box-shadow:
    inset 0 1.5px 1px rgba(255, 255, 255, 0.34),
    inset 0 -2px 3px rgba(0, 0, 0, 0.7),
    inset 0 0 0 1.5px rgba(255, 255, 255, 0.12),
    4px 4px 0 #312b23,
    8px 8px 0 #1b1814,
    9px 9px 0 rgba(255, 255, 255, 0.14),
    22px 40px 80px -10px rgba(48, 34, 10, 0.36);
}

.trio {
  list-style: none;
  margin: clamp(48px, 6vw, 76px) auto 0;
  padding: 0;
  display: grid;
  gap: 20px;
  max-width: 1020px;
}

@media (min-width: 760px) {
  .trio { grid-template-columns: repeat(3, 1fr); gap: 24px; }
}

.trio.trio-stacked {
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
  margin: 28px 0 0;
  max-width: 34em;
}

.trio.trio-stacked li {
  padding: 15px 18px;
  border-radius: 15px;
}

.trio.trio-stacked b {
  font-size: 16.5px;
  margin-bottom: 3px;
}

.trio li {
  padding: 22px 24px;
  border-radius: 18px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.02);
  font-size: 15.5px;
  line-height: 1.5;
  color: var(--text-soft);
}

.chapter.light .trio li {
  background: rgba(255, 255, 255, 0.66);
  border-color: var(--paper-line);
  color: var(--grey-on-paper);
  box-shadow: 0 8px 24px rgba(50, 36, 12, 0.05);
}

.trio b {
  display: block;
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 6px;
  letter-spacing: -0.03em;
}

.chapter.light .trio b { color: var(--text-on-paper); }

/* Split Layout */
.split {
  background: var(--ink);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.split-grid {
  display: grid;
  gap: 52px;
  align-items: center;
}

@media (min-width: 900px) {
  .split-grid { grid-template-columns: 0.95fr 1.05fr; gap: 80px; }
  .split-grid.flip { grid-template-columns: 1.05fr 0.95fr; }
  .split-grid.flip .split-copy { order: -1; }
}

.split-copy h2 { margin-bottom: 20px; }
.split-copy .chapter-lede { margin: 0; }

.ticks {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  max-width: 32em;
}

.ticks li {
  position: relative;
  padding: 13px 0 13px 30px;
  border-top: 1px solid var(--line);
  font-size: 16px;
  color: var(--text-soft);
}

.chapter.light .ticks li {
  border-top-color: var(--paper-line);
  color: var(--grey-on-paper);
}

.ticks li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 20px;
  width: 11px;
  height: 6px;
  border-left: 2px solid var(--gold);
  border-bottom: 2px solid var(--gold);
  transform: rotate(-45deg);
}

.chapter.light .ticks li::before { border-color: var(--gold-deep); }

.requires {
  margin: 20px 0 0;
  padding: 12px 15px;
  border-radius: 12px;
  background: rgba(0, 0, 0, 0.04);
  border: 1px solid var(--paper-line);
  max-width: 34em;
  font-size: 13.5px;
  line-height: 1.5;
  color: var(--grey-on-paper);
}

/* ---------- Follow the Thread & Interactive Bookshelf (explore.js) ---------- */
.explore {
  padding-block: var(--landing-space);
  background: var(--black);
}

.explore-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 26px;
  padding: clamp(22px, 3.5vw, 40px);
  box-shadow: var(--shadow-card);
}

.shelf-head { margin-top: clamp(96px, 12vw, 148px); }

.thread {
  margin: 0;
  display: grid;
  gap: 28px;
}

.thread-map {
  width: 100%;
  height: auto;
  overflow: visible;
}

.thread-arc {
  fill: none;
  stroke: var(--gold);
  stroke-width: 2;
  stroke-linecap: round;
  transition: stroke-width 0.2s, stroke-opacity 0.2s;
}

.thread-arc.is-highlighted {
  stroke: var(--gold-bright);
  stroke-width: 3.2;
  stroke-opacity: 1 !important;
  filter: drop-shadow(0 0 8px rgba(243, 217, 159, 0.55));
}

.thread-dot, .thread-here { fill: var(--gold); }
.thread-here-ring { fill: none; stroke: var(--gold); stroke-width: 2; }
.thread-here-label { fill: var(--gold); font: 600 14px var(--mono); }
.thread-band-label { fill: var(--grey); font: 500 12.5px var(--sans); }

.thread-verses {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 310px), 1fr));
}

.thread-verses li {
  padding: 14px 16px;
  border-radius: 16px;
  border: 1px solid var(--line);
  background: var(--ink);
  display: grid;
  gap: 4px;
  align-content: start;
  cursor: pointer;
  transition: border-color 0.2s, transform 0.2s var(--ease-out-soft), background-color 0.2s;
}

.thread-verses li:hover,
.thread-verses li.is-hovered {
  border-color: var(--gold);
  background: var(--surface-elevated);
  transform: translateY(-2px);
}

.thread-verses li.is-current {
  background: var(--gold-subtle);
  border-color: rgba(223, 185, 108, 0.35);
}

.thread-verses b {
  font: 600 12.5px var(--mono);
  color: var(--gold);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.thread-verses b small {
  font-weight: 500;
  color: var(--grey);
  font-size: 11px;
}

.thread-verses span {
  font-family: var(--serif);
  font-size: 16px;
  line-height: 1.45;
  color: var(--text);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.thread-verses li.is-current span {
  -webkit-line-clamp: 4;
  font-size: 17.5px;
}

/* Interactive Bookshelf */
.shelf {
  margin: 0;
  display: grid;
  gap: 24px;
  justify-items: center;
}

.shelf-hint {
  font-size: 13px;
  color: var(--gold);
  font-weight: 500;
  margin-top: -8px;
}

.shelf-row {
  display: flex;
  align-items: flex-end;
  gap: clamp(2px, 0.35vw, 4px);
  padding: 16px 10px 8px;
  border-bottom: 3px solid var(--gold-deep);
  box-shadow: 0 6px 0 -1px rgba(217, 180, 106, 0.28);
  width: min(100%, 980px);
}

.spine {
  position: relative;
  flex: 1 1 0;
  min-width: 0;
  max-width: 36px;
  border-radius: 5px 5px 2px 2px;
  background: var(--c);
  box-shadow:
    inset 2px 0 0 rgba(255, 255, 255, 0.12),
    inset -2px 0 0 rgba(0, 0, 0, 0.32),
    0 4px 10px rgba(0, 0, 0, 0.35);
  display: flex;
  justify-content: center;
  cursor: pointer;
  transition: transform 0.25s var(--ease-out-soft), filter 0.2s;
  user-select: none;
}

.spine:hover {
  transform: translateY(-10px);
  filter: brightness(1.15);
}

.spine.is-selected {
  transform: translateY(-16px);
  outline: 2px solid var(--gold-bright);
  outline-offset: 1px;
  z-index: 2;
}

.spine::before, .spine::after {
  content: "";
  position: absolute;
  left: 3px;
  right: 3px;
  height: 2px;
  background: rgba(217, 180, 106, 0.78);
}

.spine::before { top: 10px; }
.spine::after { bottom: 10px; }

.spine span {
  writing-mode: vertical-rl;
  transform: rotate(180deg);
  padding: 18px 0;
  font: 600 clamp(8px, 1.5vw, 11.5px) var(--sans);
  color: #f5eddb;
  letter-spacing: 0.02em;
  white-space: nowrap;
}

.spine.is-out {
  position: absolute;
  visibility: hidden;
}

.spine-gap {
  flex: 1 1 0;
  min-width: 0;
  max-width: 36px;
  border: 1.5px dashed rgba(223, 185, 108, 0.5);
  border-radius: 5px;
  background: rgba(223, 185, 108, 0.05);
}

.shelf-card {
  width: min(100%, 540px);
  background: var(--ink);
  border: 1px solid var(--line-strong);
  border-radius: 24px;
  padding: 22px;
  box-shadow: var(--shadow-card);
}

.shelf-title {
  background: #52474d;
  border-radius: 14px;
  padding: 15px;
  text-align: center;
  display: grid;
  gap: 3px;
  border-left: 3px solid var(--gold);
  border-right: 3px solid var(--gold);
  transition: background-color 0.25s;
}

.shelf-title strong {
  font: 500 24px var(--serif);
  color: #f5eddb;
}

.shelf-title span {
  font-size: 13px;
  color: rgba(245, 237, 219, 0.78);
}

.shelf-chapters {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(42px, 1fr));
  gap: 8px;
  margin-top: 16px;
}

.shelf-chapters button {
  display: grid;
  place-items: center;
  height: 42px;
  border-radius: 10px;
  background: var(--surface);
  border: 1px solid var(--line);
  font-family: var(--mono);
  font-size: 14px;
  font-weight: 500;
  color: var(--text-soft);
  transition: all 0.15s;
}

.shelf-chapters button:hover {
  border-color: var(--gold);
  color: var(--text);
}

.shelf-chapters button.is-chosen {
  background: var(--gold);
  color: #120f0a;
  border-color: var(--gold);
  font-weight: 700;
}

.shelf-key {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  justify-content: center;
  font-size: 13px;
  color: var(--text-soft);
}

.shelf-key i {
  display: inline-block;
  width: 10px;
  height: 10px;
  border-radius: 3px;
  margin-right: 6px;
  vertical-align: -1px;
}

/* ---------- iPhone Duo Showcase ---------- */
.duo-band {
  padding-block: var(--landing-space);
  background:
    radial-gradient(60% 45% at 50% 38%, var(--gold-glow), transparent 70%),
    var(--black);
  overflow: hidden;
}

.duo { margin: 0 auto; }
.duo-grow { max-width: 1040px; transform-origin: 50% 30%; }

.duo-frame {
  position: relative;
  padding: 14px;
  border-radius: 44px;
  background: linear-gradient(165deg, #27241f 0%, #100f0d 50%, #1d1a16 100%);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.18),
    inset 0 0 0 1px rgba(255, 255, 255, 0.08),
    0 50px 110px rgba(0, 0, 0, 0.78);
}

.duo-frame img, .duo-frame video {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1426 / 1003;
  border-radius: 32px;
  background: #111;
  object-fit: cover;
}

.duo-frame::after {
  content: "";
  position: absolute;
  top: 14px;
  bottom: 14px;
  left: 50%;
  width: 2px;
  transform: translateX(-1px);
  background: linear-gradient(to bottom, transparent, rgba(255, 255, 255, 0.1) 12%, rgba(255, 255, 255, 0.1) 88%, transparent);
  pointer-events: none;
}

.duo-video-toggle {
  position: absolute;
  right: 24px;
  bottom: 24px;
  z-index: 4;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.22);
  background: rgba(15, 13, 11, 0.72);
  color: #f6f4ef;
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  display: grid;
  place-items: center;
  transition: background-color 0.18s, border-color 0.18s, transform 0.12s;
}

.duo-video-toggle::after {
  content: "";
  position: absolute;
  inset: -4px;
}

.duo-video-toggle:hover {
  background: rgba(28, 25, 21, 0.9);
  border-color: var(--gold);
}

.duo-video-toggle:active {
  transform: scale(0.95);
}

.duo-video-toggle svg {
  grid-area: 1 / 1;
  width: 16px;
  height: 16px;
  fill: currentColor;
}

.duo-video-toggle .icon-play {
  opacity: 0;
}

.duo-video-toggle.is-paused .icon-pause {
  opacity: 0;
}

.duo-video-toggle.is-paused .icon-play {
  opacity: 1;
}

.duo figcaption {
  margin: 22px auto 0;
  max-width: 44ch;
  text-align: center;
  font-size: 16px;
  color: var(--text-soft);
}

.duo-pair {
  display: grid;
  gap: 44px;
  margin-top: clamp(64px, 8vw, 108px);
}

@media (min-width: 860px) {
  .duo-pair {
    grid-template-columns: 1fr 1fr;
    gap: 36px;
    perspective: 1500px;
  }
  .duo-pair .duo-frame {
    padding: 10px;
    border-radius: 34px;
    transition: transform 0.55s var(--ease-out-expo), box-shadow 0.55s var(--ease-out-expo);
  }
  .duo-pair .duo:first-child .duo-frame {
    transform: rotateY(8deg) rotateX(4deg);
    box-shadow:
      inset 0 1px 0 rgba(255, 255, 255, 0.22),
      -5px 5px 0 #1c1915,
      -6px 6px 0 rgba(255, 255, 255, 0.08),
      -24px 44px 90px rgba(0, 0, 0, 0.72);
  }
  .duo-pair .duo:last-child .duo-frame {
    transform: rotateY(-8deg) rotateX(4deg);
    box-shadow:
      inset 0 1px 0 rgba(255, 255, 255, 0.22),
      5px 5px 0 #1c1915,
      6px 6px 0 rgba(255, 255, 255, 0.08),
      24px 44px 90px rgba(0, 0, 0, 0.72);
  }
  .duo-pair .duo:hover .duo-frame {
    transform: rotateY(0deg) rotateX(2deg) translateY(-6px);
  }
  .duo-pair .duo-frame img { border-radius: 25px; }
  .duo-pair .duo-frame::after { top: 10px; bottom: 10px; }
}

/* ---------- 3D Apple Watch Hardware & Showcase ---------- */
.watch-band {
  padding-block: var(--landing-space);
  background:
    radial-gradient(65% 55% at 50% 42%, rgba(223, 185, 108, 0.16), transparent 72%),
    var(--ink);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  overflow: hidden;
}

/* Interactive Perspective & Digital Crown Controls */
.watch-controls {
  margin-top: 26px;
  display: inline-flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 6px;
  border-radius: 999px;
  background: var(--surface);
  border: 1px solid var(--line-strong);
  box-shadow: inset 0 1px 0 var(--specular), 0 12px 28px rgba(0, 0, 0, 0.24);
}

.watch-ctrl-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 36px;
  padding: 0 16px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-soft);
  transition: all 0.2s var(--ease-out-soft);
}

.watch-ctrl-btn:hover {
  color: var(--text);
}

.watch-ctrl-btn.is-active {
  background: var(--gold);
  color: #120f0a;
  box-shadow: 0 4px 14px var(--gold-glow);
}

.watch-crown-trigger {
  border-left: 1px solid var(--line);
  border-radius: 999px;
  padding-left: 16px;
  color: var(--gold);
}

.watch-crown-trigger:hover {
  background: var(--gold-subtle);
  color: var(--gold-bright);
}

.crown-icon {
  width: 12px;
  height: 16px;
  border-radius: 3px;
  background: repeating-linear-gradient(
    180deg,
    var(--gold) 0px,
    var(--gold) 2px,
    rgba(0, 0, 0, 0.5) 2px,
    rgba(0, 0, 0, 0.5) 4px
  );
  border: 1px solid var(--gold);
  display: inline-block;
}

/* 3D Watch Stage Row */
.watch-row {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: clamp(28px, 5.5vw, 76px);
  flex-wrap: wrap;
  perspective: 1400px;
  padding-block: clamp(36px, 5vw, 64px) clamp(24px, 3vw, 40px);
}

.watch {
  margin: 0;
  text-align: center;
  position: relative;
  cursor: pointer;
  outline: none;
  perspective: 1200px;
}

/* Reusable 3D Apple Watch Hardware Assembly (used in Hero & Watch Section) */
.watch-3d {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  transform-style: preserve-3d;
  transition: transform 0.65s var(--ease-out-expo);
  will-change: transform;
}

/* Sculpted Fluoroelastomer / Alpine Watch Straps */
.watch-strap {
  position: relative;
  width: 58%;
  height: 54px;
  z-index: 0;
  background:
    repeating-linear-gradient(
      180deg,
      rgba(255, 255, 255, 0.035) 0px,
      rgba(255, 255, 255, 0.035) 3px,
      rgba(0, 0, 0, 0.18) 3px,
      rgba(0, 0, 0, 0.18) 7px
    ),
    linear-gradient(90deg, #1b1815 0%, #332e27 28%, #3c362e 50%, #2a251f 78%, #161310 100%);
  box-shadow:
    inset 0 0 0 1px rgba(255, 255, 255, 0.08),
    0 12px 24px rgba(0, 0, 0, 0.55);
  transform-style: preserve-3d;
}

.watch-strap-top {
  margin-bottom: -10px;
  border-radius: 18px 18px 4px 4px;
  transform-origin: bottom center;
  transform: perspective(360px) rotateX(28deg);
  -webkit-mask-image: linear-gradient(to bottom, rgba(0,0,0,0.2) 0%, #000 45%, #000 100%);
  mask-image: linear-gradient(to bottom, rgba(0,0,0,0.2) 0%, #000 45%, #000 100%);
}

.watch-strap-bottom {
  margin-top: -10px;
  border-radius: 4px 4px 18px 18px;
  transform-origin: top center;
  transform: perspective(360px) rotateX(-28deg);
  -webkit-mask-image: linear-gradient(to top, rgba(0,0,0,0.2) 0%, #000 45%, #000 100%);
  mask-image: linear-gradient(to top, rgba(0,0,0,0.2) 0%, #000 45%, #000 100%);
}

.strap-lug {
  position: absolute;
  left: -8%;
  right: -8%;
  height: 9px;
  border-radius: 4px;
  background: linear-gradient(90deg, #27221c, #594f41 35%, #3e372d 70%, #1e1a15);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.25), 0 2px 5px rgba(0, 0, 0, 0.6);
}

.watch-strap-top .strap-lug { bottom: 4px; }
.watch-strap-bottom .strap-lug { top: 4px; }

/* Sculpted Titanium Watch Case */
.watch-chassis {
  position: relative;
  z-index: 2;
  width: clamp(192px, 22vw, 248px);
  padding: 13px;
  border-radius: 29% / 25%;
  background:
    radial-gradient(120% 90% at 22% 14%, rgba(255, 246, 226, 0.24) 0%, transparent 48%),
    linear-gradient(148deg, #564d3f 0%, #2a251e 36%, #13110e 68%, #3d362c 100%);
  box-shadow:
    inset 0 2px 2px rgba(255, 255, 255, 0.36),
    inset 0 -2px 4px rgba(0, 0, 0, 0.75),
    inset 0 0 0 1.5px rgba(255, 255, 255, 0.14),
    0 6px 0 #2b251e,
    0 11px 0 #181511,
    0 12px 0 rgba(255, 255, 255, 0.1),
    0 38px 72px rgba(0, 0, 0, 0.72);
  transition: box-shadow 0.65s var(--ease-out-expo);
}

.lineup-watch .watch-chassis {
  width: 100%;
}

/* Inner metallic chamfer ring around the sapphire crystal */
.watch-chassis::before {
  content: "";
  position: absolute;
  inset: 9px;
  border-radius: 26% / 22.5%;
  border: 1px solid rgba(255, 238, 204, 0.22);
  box-shadow: inset 0 2px 5px rgba(0, 0, 0, 0.85);
  pointer-events: none;
  z-index: 2;
}

/* 3D Knurled Digital Crown */
.watch-crown {
  position: absolute;
  right: -11px;
  top: 21%;
  width: 12px;
  height: 17.5%;
  border-radius: 3px 5px 5px 3px;
  background:
    repeating-linear-gradient(
      180deg,
      rgba(255, 255, 255, 0.28) 0px,
      rgba(255, 255, 255, 0.28) 2px,
      rgba(20, 17, 14, 0.85) 2px,
      rgba(20, 17, 14, 0.85) 4.5px
    ),
    linear-gradient(90deg, #241f19 0%, #6b5f4e 45%, #473f34 85%, #2a241d 100%);
  box-shadow:
    inset -2px 0 0 #d99b38,
    inset 0 1px 1px rgba(255, 255, 255, 0.35),
    0 0 0 1px #14110e,
    3px 6px 12px rgba(0, 0, 0, 0.65);
  z-index: -1;
  transition: transform 0.25s, background-position 0.45s var(--ease-out-expo);
}

.watch-crown.is-turning {
  background-position: 0 18px, 0 0;
}

/* Flush Side Button */
.watch-side-btn {
  position: absolute;
  right: -6px;
  top: 49%;
  width: 7px;
  height: 21%;
  border-radius: 2px 4px 4px 2px;
  background: linear-gradient(180deg, #5c5243 0%, #2c2720 50%, #494135 100%);
  box-shadow:
    inset -1px 0 0 rgba(255, 255, 255, 0.3),
    0 0 0 1px #14110e,
    2px 4px 8px rgba(0, 0, 0, 0.55);
  z-index: -1;
}

/* Curved 2.5D Sapphire Crystal Screen */
.watch-screen {
  position: relative;
  border-radius: 24% / 20.5%;
  overflow: hidden;
  background: #000;
  box-shadow:
    0 0 0 2px #050505,
    inset 0 2px 4px rgba(255, 255, 255, 0.32),
    inset 0 -2px 4px rgba(0, 0, 0, 0.8);
}

.watch-screen img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 416 / 496;
  border-radius: 24% / 20.5%;
  transition: transform 0.35s var(--ease-out-soft), opacity 0.25s;
}

/* Curved Sapphire Crystal Edge Glare & Studio Softbox Reflection */
.watch-glare {
  position: absolute;
  inset: 0;
  border-radius: inherit;
  pointer-events: none;
  background:
    radial-gradient(90% 55% at 20% 8%, rgba(255, 255, 255, 0.24) 0%, rgba(255, 255, 255, 0.05) 36%, transparent 62%),
    linear-gradient(132deg, rgba(255, 255, 255, 0.16) 0%, rgba(255, 255, 255, 0.02) 32%, transparent 46%);
  box-shadow:
    inset 0 1.5px 2px rgba(255, 255, 255, 0.42),
    inset 1.5px 0 2px rgba(255, 255, 255, 0.2),
    inset 0 -1.5px 3px rgba(223, 185, 108, 0.16);
  transition: opacity 0.4s, transform 0.5s var(--ease-out-expo);
}

/* Ambient Floor Shadow Under Each 3D Watch */
.watch-floor-shadow {
  width: 78%;
  height: 22px;
  margin-top: 14px;
  border-radius: 50%;
  background: radial-gradient(closest-side, rgba(0, 0, 0, 0.72), transparent);
  filter: blur(6px);
  pointer-events: none;
  transition: transform 0.65s var(--ease-out-expo), opacity 0.65s;
}

/* 3D Perspective Angles for Left, Center, and Right Watches */
.watch-row[data-watch-stage="perspective"] .watch-left .watch-3d {
  transform: rotateY(26deg) rotateX(10deg) rotateZ(-4.5deg) translateZ(-12px);
}
.watch-row[data-watch-stage="perspective"] .watch-left .watch-chassis {
  box-shadow:
    inset 0 2px 2px rgba(255, 255, 255, 0.38),
    inset 0 -2px 4px rgba(0, 0, 0, 0.75),
    inset 0 0 0 1.5px rgba(255, 255, 255, 0.15),
    -4px 3px 0 #3f382e,
    -8px 6px 0 #2a251e,
    -12px 9px 0 #171410,
    -13px 10px 0 rgba(255, 255, 255, 0.14),
    -26px 42px 68px rgba(0, 0, 0, 0.78);
}

.watch-row[data-watch-stage="perspective"] .watch-center .watch-3d {
  transform: rotateY(-5deg) rotateX(7deg) translateZ(36px) scale(1.07);
}
.watch-row[data-watch-stage="perspective"] .watch-center .watch-chassis {
  box-shadow:
    inset 0 2px 2px rgba(255, 255, 255, 0.42),
    inset 0 -2px 4px rgba(0, 0, 0, 0.75),
    inset 0 0 0 1.5px rgba(223, 185, 108, 0.25),
    2px 4px 0 #3d362c,
    4px 8px 0 #26211b,
    6px 12px 0 #15120e,
    7px 13px 0 rgba(255, 255, 255, 0.15),
    0 48px 88px rgba(0, 0, 0, 0.82),
    0 0 48px rgba(223, 185, 108, 0.12);
}

.watch-row[data-watch-stage="perspective"] .watch-right .watch-3d {
  transform: rotateY(-26deg) rotateX(10deg) rotateZ(4.5deg) translateZ(-12px);
}
.watch-row[data-watch-stage="perspective"] .watch-right .watch-chassis {
  box-shadow:
    inset 0 2px 2px rgba(255, 255, 255, 0.38),
    inset 0 -2px 4px rgba(0, 0, 0, 0.75),
    inset 0 0 0 1.5px rgba(255, 255, 255, 0.15),
    4px 3px 0 #3f382e,
    8px 6px 0 #2a251e,
    12px 9px 0 #171410,
    13px 10px 0 rgba(255, 255, 255, 0.14),
    26px 42px 68px rgba(0, 0, 0, 0.78);
}

@media (min-width: 760px) {
  /* Interactive Hover & Focus State on Any Watch */
  .watch-row .watch:hover .watch-3d,
  .watch-row .watch:focus-visible .watch-3d {
    transform: rotateY(0deg) rotateX(3deg) rotateZ(0deg) translateZ(52px) scale(1.09) !important;
  }
  .watch-row .watch:hover .watch-chassis,
  .watch-row .watch:focus-visible .watch-chassis {
    box-shadow:
      inset 0 2px 2px rgba(255, 255, 255, 0.45),
      inset 0 -2px 4px rgba(0, 0, 0, 0.75),
      inset 0 0 0 1.5px rgba(223, 185, 108, 0.35),
      0 6px 0 #3a332a,
      0 11px 0 #1b1813,
      0 52px 92px rgba(0, 0, 0, 0.84),
      0 0 54px rgba(223, 185, 108, 0.18) !important;
  }
  .watch-row .watch:hover .watch-glare {
    transform: translateX(6px) translateY(-4px);
  }
}

.watch figcaption {
  margin-top: 14px;
  display: flex;
  flex-direction: column;
  gap: 3px;
  align-items: center;
}

.watch figcaption strong {
  font-family: var(--font-display);
  font-size: 16.5px;
  font-weight: 700;
  color: var(--text);
  letter-spacing: -0.02em;
}

.watch figcaption span {
  font-size: 13px;
  color: var(--grey);
}

/* ---------- Bento Feature Tiles (Everything for the study) ---------- */
.tiles-band {
  padding-block: var(--landing-space);
  background: var(--black);
}

.tiles-title {
  font-size: clamp(34px, 4.8vw, 58px);
  max-width: 15em;
  margin-bottom: clamp(36px, 5vw, 56px);
}

.tiles {
  display: grid;
  gap: 18px;
}

@media (min-width: 760px) {
  .tiles { grid-template-columns: repeat(6, 1fr); }
  .tile { grid-column: span 2; }
  .tile-tall { grid-column: span 3; }
}

.tile {
  position: relative;
  overflow: hidden;
  border-radius: 26px;
  background: var(--surface);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-card);
  min-height: 440px;
  display: flex;
  flex-direction: column;
  transition: border-color 0.25s, transform 0.25s var(--ease-out-soft);
}

.tile:hover {
  border-color: var(--line-strong);
  transform: translateY(-3px);
}

.tile::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: radial-gradient(80% 50% at 50% 100%, var(--gold-glow), transparent 70%);
}

.tile-tall { min-height: 580px; }

.tile-copy {
  padding: 32px 32px 0;
  position: relative;
  z-index: 1;
}

.tile-copy .eyebrow { margin-bottom: 8px; }
.tile-copy h3 { margin-bottom: 10px; }
.tile-copy p:not(.eyebrow) {
  color: var(--text-soft);
  font-size: 16px;
  line-height: 1.5;
  max-width: 26em;
}

.tile-shot {
  margin-top: auto;
  display: flex;
  justify-content: center;
  padding-top: 28px;
  height: 300px;
  overflow: hidden;
  position: relative;
  z-index: 1;
}

.tile-tall .tile-shot { height: 380px; }

.tile-shot img {
  display: block;
  width: 62%;
  max-width: 256px;
  height: auto;
  aspect-ratio: 660 / 1434;
  align-self: flex-start;
  border-radius: 34px 34px 0 0;
  box-shadow:
    0 0 0 8px #121110,
    0 0 0 9px rgba(255, 255, 255, 0.12),
    0 24px 48px rgba(0, 0, 0, 0.55);
}

.tile-tall .tile-shot img { width: 52%; max-width: 276px; }

/* ---------- Split FAQ Section ---------- */
.landing-faq {
  padding-block: var(--landing-space);
  border-top: 1px solid var(--line);
}

.faq-split {
  display: grid;
  gap: 40px 80px;
}

@media (min-width: 860px) {
  .faq-split { grid-template-columns: 0.72fr 1.28fr; }
}

.faq-intro h2 {
  font-size: clamp(32px, 3.4vw, 46px);
  line-height: 1.12;
  margin-bottom: 16px;
}

.faq-intro p {
  color: var(--text-soft);
  font-size: 16.5px;
  line-height: 1.55;
  margin-bottom: 20px;
}

/* ---------- Privacy & Closing ---------- */
.privacy .chapter-head { margin-bottom: 0; }

.more-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-weight: 600;
  font-size: 16px;
  color: var(--gold);
  margin-top: 16px;
}

.chapter.light .more-link { color: var(--gold-deep); }
.more-link:hover { text-decoration: underline; text-underline-offset: 4px; }
.more-link svg {
  width: 16px;
  height: 16px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.closing {
  position: relative;
  isolation: isolate;
  padding-block: clamp(104px, 13vw, 168px);
  text-align: center;
  background:
    radial-gradient(60% 60% at 50% 50%, var(--gold-glow), transparent 72%),
    var(--black);
  border-top: 1px solid var(--line);
}

.closing blockquote {
  margin: 0 auto 36px;
  max-width: 24em;
  font: italic 400 clamp(25px, 3.4vw, 40px)/1.32 var(--serif);
  letter-spacing: -0.005em;
  text-wrap: balance;
  color: var(--text);
}

.closing cite {
  display: block;
  margin-top: 18px;
  font: normal 600 13.5px var(--mono);
  color: var(--gold);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

/* ---------- Atmospheric Footer ---------- */
.foot {
  background: var(--ink);
  border-top: 1px solid var(--line);
  color: var(--grey);
  font-size: 13.5px;
  line-height: 1.55;
  padding-block: 48px 36px;
}

.foot-note {
  padding-bottom: 22px;
  border-bottom: 1px solid var(--line);
  margin: 0 0 22px;
  color: var(--text-soft);
  max-width: 780px;
}

.foot-row, .foot > .wrap:not(:has(.foot-row)) {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 28px;
  justify-content: space-between;
  align-items: center;
}

.foot nav { display: flex; flex-wrap: wrap; gap: 22px; }
.foot a { color: var(--text-soft); font-weight: 500; transition: color 0.15s; }
.foot a:hover { color: var(--gold); text-decoration: underline; text-underline-offset: 4px; }

/* ---------- Support and Privacy pages & FAQ Accordion ---------- */
.label { font: 600 14px/1.3 var(--sans); text-transform: uppercase; letter-spacing: 0.08em; color: var(--gold); margin: 0 0 12px; }
.lede { font-size: 20px; line-height: 1.48; color: var(--text-soft); }
.muted { color: var(--grey); }
.doc { padding-block: 64px 104px; }
.doc h1 { font-size: clamp(38px, 5.4vw, 60px); margin-bottom: 16px; }
.doc h2 { font-size: 26px; margin: 44px 0 12px; }
.doc p { color: var(--text-soft); }
.doc .updated { font-size: 13.5px; color: var(--grey); margin-bottom: 36px; font-family: var(--mono); }

.contact {
  margin: 32px 0 12px;
  padding: 24px 28px;
  border-radius: 20px;
  background: var(--surface);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-card);
}

.contact a { color: var(--gold); font-family: var(--font-display); font-weight: 700; font-size: 21px; }
.contact a:hover { text-decoration: underline; text-underline-offset: 4px; }

.faq {
  border-top: 1px solid var(--line);
}

.faq details {
  border-bottom: 1px solid var(--line);
}

.faq summary {
  cursor: pointer;
  list-style: none;
  padding: 22px 40px 22px 0;
  position: relative;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 18.5px;
  letter-spacing: -0.02em;
  color: var(--text);
  transition: color 0.15s;
}

.faq summary:hover { color: var(--gold); }
.faq summary::-webkit-details-marker { display: none; }

.faq summary::after {
  content: "+";
  position: absolute;
  right: 4px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 22px;
  font-weight: 400;
  color: var(--gold);
}

.faq details[open] summary::after { content: "\2212"; }

.faq details p {
  color: var(--text-soft);
  font-size: 16px;
  line-height: 1.6;
  margin: -2px 0 22px;
  max-width: 62ch;
}

/* ---------- Motion & Entrance Choreography (Instant First Paint, Never Blank) ---------- */

/* ---------- Mobile-Only Switchers (Hidden on Desktop; Hero Tabs stay visible on Desktop!) ---------- */
.bento-mobile-tabs,
.watch-mobile-picker {
  display: none;
}

/* ---------- Purpose-Built Mobile Landing Page Architecture ---------- */
@media (max-width: 859px) {
  .links-lines {
    display: none;
  }
  .links-map {
    grid-template-columns: minmax(0, 1fr);
    gap: 16px;
  }
  .links-verse {
    padding: 18px;
  }
  .links-verse::after {
    content: "";
    position: absolute;
    left: 28px;
    bottom: -17px;
    width: 2px;
    height: 17px;
    background: var(--gold);
    opacity: 0.65;
  }
}

@media (max-width: 759px) {
  :root {
    --landing-space: 52px;
  }

  .wrap {
    width: calc(100% - 28px);
    max-width: 100%;
  }

  /* Prevent any grid track from expanding past mobile viewport */
  .bento-grid,
  .split-grid,
  .faq-split,
  .thread,
  .shelf {
    grid-template-columns: minmax(0, 1fr);
  }

  /* 1. Compact Mobile Sticky Glass Top Bar */
  .hide-mobile {
    display: none !important;
  }
  .globalnav, .top {
    height: 54px;
    border-bottom: 1px solid var(--line);
  }
  .globalnav .wrap, .top .wrap {
    gap: 6px;
  }
  .brand {
    font-size: 15px;
    gap: 7px;
    white-space: nowrap;
    flex-shrink: 0;
  }
  .brand .mark, .brand img {
    width: 22px;
    height: 22px;
  }
  .nav-chapters {
    margin-left: auto;
    gap: 2px;
  }
  .nav-chapters a,
  .nav-util-link,
  .top nav a {
    padding: 0 7px;
    font-size: 12.5px;
    min-height: 32px;
    white-space: nowrap;
  }
  .nav-utilities {
    gap: 2px;
  }
  .theme-toggle {
    width: 32px;
    height: 32px;
    margin-left: 2px;
  }

  /* 2. Mobile Hero Section + Interactive Stage Switcher */
  .hero {
    padding-block: 20px 32px;
  }
  .hero-badge {
    font-size: 11.5px;
    gap: 8px;
    padding: 3px 12px;
    margin-bottom: 14px;
    max-width: 100%;
    border: 1px solid var(--line);
    background: var(--surface);
  }
  .hero h1 {
    font-size: clamp(32px, 8.8vw, 42px);
    line-height: 1.05;
    letter-spacing: -0.05em;
  }
  .hero-lede {
    font-size: 15px;
    line-height: 1.48;
    margin-top: 12px;
  }
  .hero-actions {
    margin-top: 18px;
    display: grid;
    grid-template-columns: minmax(0, 1fr);
    gap: 8px;
    max-width: 320px;
    margin-inline: auto;
  }
  .btn-primary, .btn-secondary {
    width: 100%;
    min-height: 44px;
    font-size: 14px;
    padding: 0 18px;
  }
  .hero-meta {
    margin-top: 14px;
    display: grid;
    grid-template-columns: repeat(2, max-content);
    justify-content: center;
    gap: 4px 14px;
    font-size: 11.5px;
  }

  .hero-stage {
    margin-top: 20px;
    padding-block: 4px 0;
  }

  /* Unified Native Apple Segmented Control Style on Mobile */
  .hero-stage-toolbar {
    margin-bottom: 14px;
  }
  .hero-device-tabs {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 2px;
    padding: 3px;
    width: 100%;
    max-width: 356px;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.12);
    box-shadow: inset 0 1px 2px rgba(0, 0, 0, 0.2);
    margin: 0 auto;
  }
  .bento-mobile-tabs,
  .watch-mobile-picker {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 3px;
    padding: 3px;
    width: 100%;
    max-width: 340px;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.12);
    box-shadow: inset 0 1px 2px rgba(0, 0, 0, 0.2);
    margin: 14px auto;
  }
  :root[data-theme="light"] .hero-device-tabs,
  :root[data-theme="light"] .bento-mobile-tabs,
  :root[data-theme="light"] .watch-mobile-picker {
    background: rgba(0, 0, 0, 0.06);
    border-color: rgba(0, 0, 0, 0.1);
    box-shadow: inset 0 1px 2px rgba(0, 0, 0, 0.05);
  }
  .hero-device-tab,
  .bento-mob-tab,
  .watch-pick-btn {
    min-height: 32px;
    padding: 0 8px;
    border-radius: 999px;
    font-family: var(--font-ui);
    font-size: 11.5px;
    font-weight: 500;
    color: var(--text-soft);
    background: transparent;
    border: none;
    white-space: nowrap;
    transition: all 0.2s var(--ease-out-soft);
  }
  .hero-device-tab.is-active,
  .bento-mob-tab.is-active,
  .watch-pick-btn.is-active {
    background: rgba(255, 255, 255, 0.18);
    color: var(--text);
    font-weight: 600;
    border: 0.5px solid rgba(255, 255, 255, 0.25);
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.3);
  }
  :root[data-theme="light"] .hero-device-tab.is-active,
  :root[data-theme="light"] .bento-mob-tab.is-active,
  :root[data-theme="light"] .watch-pick-btn.is-active {
    background: #ffffff;
    color: #111111;
    border: 0.5px solid rgba(0, 0, 0, 0.08);
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.12);
  }

  /* Purpose-Built Mobile Hero Stage Composition (All 4 Modes Supported) */
  .stage-composition {
    display: flex;
    flex-direction: column;
    gap: 14px;
    width: 100%;
    max-width: 100%;
    min-width: 0;
    min-height: 0;
  }
  .lineup {
    aspect-ratio: auto;
    height: 348px;
    width: 100%;
    max-width: 350px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: center;
  }

  /* Mode 1 (Default `ensemble`): Panoramic Duo upper stage + 3D iPhone & 3D Watch lower foreground flanks */
  .hero-stage[data-hero-device="ensemble"] .lineup-duo {
    position: absolute;
    left: 4%;
    width: 92%;
    top: 0;
    padding: 5px;
    border-radius: 15px;
    transform: perspective(900px) rotateX(4deg) !important;
    z-index: 2;
    opacity: 1 !important;
  }
  .hero-stage[data-hero-device="ensemble"] .lineup-duo img {
    border-radius: 11px;
  }
  .hero-stage[data-hero-device="ensemble"] .lineup-phone {
    position: absolute;
    left: 5%;
    bottom: 2px;
    width: 96px;
    padding: 4px;
    border-radius: 19px;
    transform: perspective(800px) rotateY(14deg) rotateX(3deg) rotateZ(-2deg) !important;
    z-index: 5;
    opacity: 1 !important;
  }
  .hero-stage[data-hero-device="ensemble"] .lineup-phone img {
    border-radius: 15px;
  }
  .hero-stage[data-hero-device="ensemble"] .lineup-watch {
    position: absolute;
    right: 7%;
    bottom: 6px;
    width: 84px;
    z-index: 6;
    opacity: 1 !important;
  }

  /* Mode 2 (`duo`): Full-Width Unfolded iPhone Duo Spread */
  .hero-stage[data-hero-device="duo"] .lineup {
    height: 252px;
  }
  .hero-stage[data-hero-device="duo"] .lineup-duo {
    position: relative;
    left: auto;
    right: auto;
    top: auto;
    width: 100%;
    padding: 6px;
    border-radius: 16px;
    transform: rotateX(3deg) !important;
    opacity: 1 !important;
  }
  .hero-stage[data-hero-device="duo"] .lineup-duo img {
    border-radius: 11px;
  }
  .hero-stage[data-hero-device="duo"] .lineup-phone,
  .hero-stage[data-hero-device="duo"] .lineup-watch {
    opacity: 0 !important;
    pointer-events: none;
  }

  /* Mode 3 (`iphone`): Focused 3D iPhone Studio View */
  .hero-stage[data-hero-device="iphone"] .lineup {
    height: 292px;
  }
  .hero-stage[data-hero-device="iphone"] .lineup-duo,
  .hero-stage[data-hero-device="iphone"] .lineup-watch {
    opacity: 0 !important;
    pointer-events: none;
  }
  .hero-stage[data-hero-device="iphone"] .lineup-phone {
    position: relative;
    left: auto;
    bottom: auto;
    width: 138px;
    padding: 6px;
    border-radius: 26px;
    transform: perspective(900px) rotateY(-8deg) rotateX(3deg) rotateZ(1deg) !important;
    opacity: 1 !important;
    z-index: 6;
  }
  .hero-stage[data-hero-device="iphone"] .lineup-phone img {
    border-radius: 21px;
  }

  /* Mode 4 (`watch`): Close-Up 3D Perspective Apple Watch */
  .hero-stage[data-hero-device="watch"] .lineup {
    height: 272px;
  }
  .hero-stage[data-hero-device="watch"] .lineup-duo,
  .hero-stage[data-hero-device="watch"] .lineup-phone {
    opacity: 0 !important;
    pointer-events: none;
  }
  .hero-stage[data-hero-device="watch"] .lineup-watch {
    position: relative;
    right: auto;
    bottom: auto;
    width: 144px;
    opacity: 1 !important;
  }

  /* Hero 3D Watch hardware proportions on mobile */
  .lineup-watch .watch-strap {
    height: 20px;
    border-radius: 7px;
  }
  .lineup-watch .watch-strap-top { margin-bottom: -4px; }
  .lineup-watch .watch-strap-bottom { margin-top: -4px; }
  .lineup-watch .strap-lug { height: 3.5px; }
  .lineup-watch .watch-chassis {
    padding: 6.5%;
    box-shadow:
      inset 0 1px 1px rgba(255, 255, 255, 0.35),
      inset 0 0 0 1px rgba(255, 255, 255, 0.14),
      3px 2px 0 #3a332a,
      6px 4px 0 #171410,
      14px 24px 40px rgba(0, 0, 0, 0.85);
  }
  .lineup-watch .watch-chassis::before { inset: 3px; }
  .lineup-watch .watch-crown {
    right: -5px;
    width: 5px;
    border-radius: 1px 3px 3px 1px;
  }
  .lineup-watch .watch-side-btn {
    right: -3px;
    width: 3px;
  }

  /* Interactive Mobile Stage Callout Cards (Compact 3-Row Tappable Stack — Zero Overflow) */
  .stage-callouts {
    display: grid;
    grid-template-columns: minmax(0, 1fr);
    gap: 8px;
    width: 100%;
    max-width: 100%;
  }
  .stage-callout {
    width: 100%;
    transform: none !important;
  }
  .callout-card {
    padding: 11px 13px;
    border-radius: 14px;
    height: 100%;
  }
  .callout-head {
    display: flex;
    flex-direction: row;
    align-items: baseline;
    justify-content: space-between;
    gap: 8px;
    margin-bottom: 4px;
  }
  .callout-ref {
    font-size: 12.5px;
  }
  .callout-count {
    font-size: 11px;
  }
  .callout-verse {
    font-size: 12px;
    line-height: 1.35;
    margin: 0 0 5px;
    display: -webkit-box;
    -webkit-line-clamp: 1;
    -webkit-box-orient: vertical;
    overflow: hidden;
  }
  .callout-meta {
    font-size: 10.5px;
    gap: 4px;
  }
  .callout-action {
    font-size: 11px;
  }

  /* 3. Editorial Intro + 3-Column Horizontal Metrics Strip */
  .intro h2 {
    font-size: clamp(26px, 7.2vw, 34px);
  }
  .intro-text {
    font-size: 15px;
    line-height: 1.5;
    margin-top: 12px;
  }
  .stats {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 8px;
    margin-top: 22px;
  }
  .stat {
    padding: 14px 8px;
    border-radius: 16px;
    text-align: center;
  }
  .stat b {
    font-size: 28px;
  }
  .stat span {
    font-size: 11px;
    line-height: 1.28;
    margin-top: 5px;
  }

  /* 5. Mobile Bento Workbench (Segmented 3-Tab Interactive View) */
  .bento-header {
    margin-bottom: 18px;
  }
  .bento-header p.chapter-lede {
    font-size: 14.5px;
    margin-top: 10px;
  }
  .bento-mobile-tabs {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 3px;
    padding: 3px;
    margin-top: 16px;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.12);
  }
  :root[data-theme="light"] .bento-mobile-tabs {
    background: rgba(0, 0, 0, 0.06);
    border-color: rgba(0, 0, 0, 0.1);
  }
  .bento-mob-tab {
    min-height: 34px;
    padding: 0 8px;
    border-radius: 999px;
    font-family: var(--font-ui);
    font-size: 12px;
    font-weight: 500;
    color: var(--text-soft);
    background: transparent;
    border: none;
    white-space: nowrap;
    transition: all 0.2s;
  }
  .bento-mob-tab.is-active {
    background: rgba(255, 255, 255, 0.18);
    color: var(--text);
    font-weight: 600;
    border: 0.5px solid rgba(255, 255, 255, 0.25);
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.3);
  }
  :root[data-theme="light"] .bento-mob-tab.is-active {
    background: #ffffff;
    color: #111111;
    border: 0.5px solid rgba(0, 0, 0, 0.08);
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.12);
  }
  .bento-tile {
    padding: 18px 15px;
    border-radius: 20px;
    gap: 14px;
  }
  .bento-tile:not(.is-bento-active) {
    display: none;
  }
  .bento-top h3 {
    font-size: 19px;
  }
  .bento-top p {
    font-size: 14px;
    margin-bottom: 10px;
  }
  .verse-switcher {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 6px;
  }
  .verse-pill {
    justify-content: space-between;
    padding: 5px 10px;
    font-size: 11.5px;
    min-height: 34px;
  }
  .verse-pill .pill-count {
    font-size: 10px;
    padding: 1px 5px;
  }
  .links-verse blockquote {
    font-size: 16.5px;
    margin: 6px 0 12px;
  }
  .links-sermons li {
    padding: 9px 11px;
    font-size: 12.5px;
    gap: 8px;
  }
  .links-sermons li .stitle {
    flex: 1;
    min-width: 0;
  }
  /* Show top 4 linked sermons + summary row on mobile to keep workbench compact */
  .links-sermons li[data-to]:nth-child(n+5) {
    display: none;
  }

  /* 6. Chapters (Read, Sermons, Ask) on Mobile */
  .chapter-head {
    margin-bottom: 24px;
  }
  .chapter-head h2, .split-copy h2 {
    font-size: clamp(26px, 7.2vw, 34px);
    margin-bottom: 12px;
  }
  .chapter-lede {
    font-size: 15px;
    line-height: 1.48;
  }
  .phone {
    max-width: 208px;
    padding: 8px;
    border-radius: 38px;
    transform: rotateX(3deg) rotateY(-5deg);
  }
  .phone::after {
    inset: 8px;
    border-radius: 31px;
  }
  .phone img {
    border-radius: 31px;
  }
  .trio {
    margin-top: 24px;
    gap: 8px;
  }
  .trio li {
    padding: 13px 15px;
    border-radius: 14px;
    font-size: 13.5px;
  }
  .trio b {
    font-size: 15.5px;
    margin-bottom: 2px;
  }
  .split-grid {
    gap: 24px;
  }
  .ticks {
    margin-top: 18px;
  }
  .ticks li {
    padding: 10px 0 10px 26px;
    font-size: 14px;
  }
  .ticks li::before {
    top: 16px;
  }

  /* 7. Explore: Follow the Thread (Horizontal Touch Carousel) & 66-Book Shelf */
  .explore-card {
    padding: 16px 12px;
    border-radius: 20px;
  }
  .thread {
    gap: 14px;
  }
  .thread-map {
    min-height: 108px;
  }
  .thread-here-label { font-size: 22px; }
  .thread-band-label { font-size: 19px; }
  .thread-verses {
    display: flex;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scroll-snap-type: x mandatory;
    gap: 10px;
    padding-bottom: 4px;
    scrollbar-width: none;
  }
  .thread-verses::-webkit-scrollbar { display: none; }
  .thread-verses li {
    flex: 0 0 248px;
    scroll-snap-align: start;
    padding: 12px 14px;
    border-radius: 14px;
  }
  .thread-verses span,
  .thread-verses li.is-current span {
    font-size: 13.5px;
    -webkit-line-clamp: 3;
  }

  .shelf-head {
    margin-top: 48px;
  }
  .shelf {
    gap: 16px;
  }
  .shelf-row {
    width: 100%;
    max-width: 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    justify-content: flex-start;
    gap: 4px;
    padding: 10px 4px 6px;
    scrollbar-width: none;
  }
  .shelf-row::-webkit-scrollbar { display: none; }
  .spine, .spine-gap {
    flex: 0 0 25px;
    min-width: 25px;
    max-width: 25px;
    max-height: 116px;
  }
  .spine span {
    font-size: 9.5px;
    padding: 12px 0;
  }
  .shelf-card {
    padding: 14px;
    border-radius: 16px;
  }
  .shelf-title {
    padding: 10px;
  }
  .shelf-title strong {
    font-size: 19px;
  }
  .shelf-chapters {
    grid-template-columns: repeat(auto-fill, minmax(34px, 1fr));
    gap: 5px;
    margin-top: 12px;
  }
  .shelf-chapters button {
    height: 34px;
    font-size: 12.5px;
    border-radius: 8px;
  }
  .shelf-key {
    gap: 6px 12px;
    font-size: 11.5px;
  }

  /* 8. iPhone Duo Section: Centerpiece Video + Horizontal Swipeable Pair */
  .duo-frame {
    padding: 6px;
    border-radius: 18px;
  }
  .duo-frame img, .duo-frame video {
    border-radius: 13px;
    aspect-ratio: 1426 / 1003;
  }
  .duo-frame::after {
    top: 6px;
    bottom: 6px;
  }
  .duo figcaption {
    font-size: 13px;
    margin-top: 10px;
  }
  .duo-pair {
    display: flex;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scroll-snap-type: x mandatory;
    gap: 12px;
    margin-top: 24px;
    padding-bottom: 4px;
    scrollbar-width: none;
    width: 100%;
    max-width: 100%;
  }
  .duo-pair::-webkit-scrollbar { display: none; }
  .duo-pair .duo {
    flex: 0 0 85%;
    min-width: 0;
    scroll-snap-align: center;
  }

  /* 9. 3D Apple Watch Stage on Mobile: Centerpiece 3D Hardware + Screen Picker */
  .watch-controls {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 5px;
    width: 100%;
    max-width: 320px;
    border-radius: 16px;
    padding: 5px;
    margin-top: 16px;
  }
  .watch-ctrl-btn {
    justify-content: center;
    padding: 0 10px;
    font-size: 12px;
    min-height: 34px;
  }
  .watch-crown-trigger {
    grid-column: 1 / -1;
    border-left: 0;
    border-top: 1px solid var(--line);
    border-radius: 10px;
    padding-top: 2px;
  }
  .watch-mobile-picker {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 3px;
    padding: 3px;
    max-width: 320px;
    margin: 10px auto 0;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.12);
  }
  :root[data-theme="light"] .watch-mobile-picker {
    background: rgba(0, 0, 0, 0.06);
    border-color: rgba(0, 0, 0, 0.1);
  }
  .watch-pick-btn {
    min-height: 32px;
    border-radius: 999px;
    font-family: var(--font-ui);
    font-size: 12px;
    font-weight: 500;
    color: var(--text-soft);
    background: transparent;
    border: none;
    transition: all 0.2s;
  }
  .watch-pick-btn.is-active {
    background: rgba(255, 255, 255, 0.18);
    color: var(--text);
    font-weight: 600;
    border: 0.5px solid rgba(255, 255, 255, 0.25);
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.3);
  }
  :root[data-theme="light"] .watch-pick-btn.is-active {
    background: #ffffff;
    color: #111111;
    border: 0.5px solid rgba(0, 0, 0, 0.08);
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.12);
  }
  .watch-row {
    display: flex;
    justify-content: center;
    align-items: center;
    padding-block: 16px 8px;
    perspective: 1100px;
  }
  .watch-row .watch {
    display: none;
    width: 100%;
    max-width: 196px;
    margin: 0 auto;
  }
  .watch-row[data-watch-active="0"] .watch-left,
  .watch-row[data-watch-active="1"] .watch-center,
  .watch-row[data-watch-active="2"] .watch-right {
    display: flex;
  }
  .watch-row .watch-chassis {
    width: 168px;
    padding: 11px;
  }
  .watch-row[data-watch-stage="perspective"] .watch .watch-3d {
    transform: rotateY(-16deg) rotateX(8deg) rotateZ(2.5deg) translateZ(12px);
  }
  .watch figcaption {
    margin-top: 12px;
  }
  .watch figcaption strong {
    font-size: 16px;
  }
  .watch figcaption span {
    font-size: 13px;
  }

  /* 10. Study Suite Tiles: Horizontal Touch-Snap Carousel on Mobile */
  .tiles-title {
    font-size: clamp(26px, 7.2vw, 34px);
    margin-bottom: 20px;
  }
  .tiles {
    display: flex;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scroll-snap-type: x mandatory;
    gap: 12px;
    padding-bottom: 6px;
    scrollbar-width: none;
    width: 100%;
    max-width: 100%;
  }
  .tiles::-webkit-scrollbar { display: none; }
  .tile, .tile-tall {
    flex: 0 0 80%;
    min-width: 0;
    min-height: 320px;
    max-height: 340px;
    border-radius: 20px;
    scroll-snap-align: start;
  }
  .tile-copy {
    padding: 18px 18px 0;
  }
  .tile-copy h3 {
    font-size: 18px;
    margin-bottom: 6px;
  }
  .tile-copy p:not(.eyebrow) {
    font-size: 13.5px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
  }
  .tile-shot, .tile-tall .tile-shot {
    height: 190px;
    padding-top: 14px;
  }
  .tile-shot img, .tile-tall .tile-shot img {
    width: 56%;
    max-width: 165px;
    border-radius: 22px 22px 0 0;
  }

  /* 11. FAQ & Closing on Mobile */
  .faq-split {
    gap: 20px;
  }
  .faq-intro h2 {
    font-size: 28px;
    margin-bottom: 10px;
  }
  .faq-intro p {
    font-size: 14.5px;
    margin-bottom: 12px;
  }
  .faq summary {
    font-size: 15.5px;
    padding: 15px 28px 15px 0;
  }
  .faq details p {
    font-size: 14px;
    margin-bottom: 16px;
  }
  .closing {
    padding-block: 56px;
  }
  .closing blockquote {
    font-size: 20px;
    margin-bottom: 24px;
  }
}