:root {
  --bg: #05060d;
  --bg-2: #0a0c18;
  --ink: #f4f1ea;
  --ink-2: rgba(244, 241, 234, 0.72);
  --ink-3: rgba(244, 241, 234, 0.5);
  --line: rgba(255, 255, 255, 0.1);
  --glass: rgba(255, 255, 255, 0.06);
  --glass-2: rgba(255, 255, 255, 0.1);
  --cool: #6fc5ff;
  --violet: #9f89ff;
  --coral: #ff8bc1;
  --peach: #ffb678;
  --gold: #ffc46b;
  --spectrum: linear-gradient(100deg, var(--cool), var(--violet) 35%, var(--coral) 68%, var(--peach));
  --conic: conic-gradient(from 0deg, #6fc5ff, #9f89ff, #ff8bc1, #ffb678, #ffe27a, #7ff0c4, #6fc5ff);
  --radius: 28px;
  --gutter: clamp(16px, 4vw, 48px);
  --max: 1200px;
  --sans: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", "Inter", "Helvetica Neue", Arial, sans-serif;
  --serif: "Instrument Serif", "New York", Georgia, serif;
  color-scheme: dark;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 400 17px/1.55 var(--sans);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
h1, h2, h3 { margin: 0; font-weight: 600; letter-spacing: -0.025em; }
em { font-family: var(--serif); font-style: italic; font-weight: 400; letter-spacing: -0.01em; }
h1 em, h2 em {
  background: var(--spectrum);
  -webkit-background-clip: text; background-clip: text;
  color: transparent;
  padding-right: 0.06em;
}
:focus-visible { outline: 2px solid var(--cool); outline-offset: 3px; border-radius: 8px; }

/* ---------- Aurora background ---------- */
.aurora { position: fixed; inset: 0; z-index: -1; overflow: hidden; pointer-events: none; }
.aurora span {
  position: absolute; width: 70vmax; height: 70vmax; border-radius: 50%;
  opacity: 0.5; will-change: transform;
  animation: drift 28s ease-in-out infinite alternate;
}
.aurora span:nth-child(1) { background: radial-gradient(closest-side, rgba(27, 92, 255, 0.55), transparent); top: -30vmax; left: -20vmax; }
.aurora span:nth-child(2) { background: radial-gradient(closest-side, rgba(139, 61, 255, 0.45), transparent); top: 5vmax; right: -30vmax; animation-duration: 34s; }
.aurora span:nth-child(3) { background: radial-gradient(closest-side, rgba(255, 94, 154, 0.28), transparent); bottom: -35vmax; left: 5vmax; animation-duration: 40s; }
.aurora span:nth-child(4) { background: radial-gradient(closest-side, rgba(255, 154, 61, 0.22), transparent); bottom: -40vmax; right: -15vmax; animation-duration: 31s; }
@keyframes drift {
  0% { transform: translate3d(0, 0, 0) scale(1); }
  100% { transform: translate3d(8vmax, 6vmax, 0) scale(1.15); }
}

/* ---------- Nav ---------- */
.nav {
  position: fixed; top: 12px; left: 50%; transform: translateX(-50%);
  z-index: 50; width: min(var(--max), calc(100% - 24px));
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  padding: 8px 8px 8px 14px; border-radius: 999px;
  background: rgba(12, 14, 26, 0.5);
  border: 1px solid var(--line);
  backdrop-filter: blur(24px) saturate(160%); -webkit-backdrop-filter: blur(24px) saturate(160%);
  transition: background 0.3s;
}
.nav.scrolled { background: rgba(12, 14, 26, 0.78); }
.nav-brand { display: flex; align-items: center; gap: 8px; }
.nav-brand img:first-child { width: 32px; height: 32px; border-radius: 50%; }
.nav-word { height: 22px; width: auto; }
.nav-links { display: flex; gap: 4px; }
.nav-links a { padding: 8px 14px; border-radius: 999px; font-size: 14px; color: var(--ink-2); transition: color 0.2s, background 0.2s; }
.nav-links a:hover { color: var(--ink); background: var(--glass); }
.nav-actions { display: flex; align-items: center; gap: 6px; }


/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 15px 26px; border-radius: 999px;
  font: 600 16px/1 var(--sans); letter-spacing: -0.01em;
  transition: transform 0.2s ease, background 0.2s, box-shadow 0.3s;
}
.btn:active { transform: scale(0.97); }
.btn svg { width: 20px; height: 20px; fill: currentColor; margin-top: -2px; }
.btn-primary { background: var(--ink); color: #07080f; box-shadow: 0 10px 40px -10px rgba(159, 137, 255, 0.6); }
.btn-primary:hover { box-shadow: 0 14px 50px -8px rgba(255, 139, 193, 0.65); }
.btn-ghost { background: var(--glass); border: 1px solid var(--line); backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px); }
.btn-ghost:hover { background: var(--glass-2); }
.btn-small { padding: 10px 16px; font-size: 14px; background: var(--ink); color: #07080f; }

/* ---------- Layout ---------- */
.section { position: relative; padding: clamp(90px, 13vw, 170px) var(--gutter) 0; max-width: calc(var(--max) + 2 * var(--gutter)); margin: 0 auto; }
.section-head { max-width: 760px; margin: 0 auto 56px; text-align: center; }
.section-head h2, .final h2, .design-copy h2 { font-size: clamp(38px, 6vw, 72px); line-height: 1.02; }
.kicker {
  margin: 0 0 18px; font-size: 13px; font-weight: 600; letter-spacing: 0.18em; text-transform: uppercase;
  background: var(--spectrum); -webkit-background-clip: text; background-clip: text; color: transparent;
}
.sub { color: var(--ink-2); font-size: clamp(17px, 1.6vw, 20px); margin: 22px auto 0; max-width: 640px; }
.fine { color: var(--ink-3); font-size: 13.5px; text-align: center; max-width: 680px; margin: 36px auto 0; }
.glass {
  background: linear-gradient(160deg, rgba(255, 255, 255, 0.09), rgba(255, 255, 255, 0.03));
  border: 1px solid var(--line);
  border-radius: var(--radius);
  backdrop-filter: blur(20px) saturate(150%); -webkit-backdrop-filter: blur(20px) saturate(150%);
}

/* ---------- iPhone frame ----------
   Sized from its own width (container units): titanium edge, black screen
   border, screen corners matching iPhone, and real side buttons. */
.phone {
  --ti: linear-gradient(90deg, #5b5e66, #c7cad1 6%, #8a8d95 14%, #3b3d43 50%, #8a8d95 86%, #c7cad1 94%, #5b5e66);
  position: relative; container-type: inline-size;
  aspect-ratio: 1260 / 2736;
  border-radius: 14.6% / 6.7%;
  background: var(--ti);
  box-shadow: 0 50px 100px -30px rgba(0, 0, 0, 0.85), 0 18px 40px -18px rgba(80, 90, 255, 0.28);
}
.phone > img {
  position: absolute; inset: 0.9cqw; width: calc(100% - 1.8cqw); height: calc(100% - 1.8cqw); object-fit: cover; box-sizing: border-box;
  border: 2.4cqw solid #050506; border-radius: 13.4cqw; background: #000;
}
/* Side button (right) */
.phone::before {
  content: ""; position: absolute; right: -0.9cqw; top: 26%; width: 1cqw; height: 9.5%;
  border-radius: 0 1cqw 1cqw 0; background: linear-gradient(90deg, #2c2e33, #9a9da5);
}
/* Action button + volume up/down (left) */
.phone::after {
  content: ""; position: absolute; left: -0.9cqw; top: 16%; width: 1cqw; height: 3.6%;
  border-radius: 1cqw 0 0 1cqw; background: linear-gradient(90deg, #9a9da5, #2c2e33);
  box-shadow: 0 12cqw 0 0.05cqw #7c7f87, 0 25cqw 0 0.05cqw #7c7f87;
}
.phone-stack > img { opacity: 0; transform: scale(1.03); transition: opacity 0.7s ease, transform 0.9s ease; }
.phone-stack > img.is-on { opacity: 1; transform: none; }

/* ---------- Hero ---------- */
.hero {
  min-height: 100svh; display: grid; grid-template-columns: 1.05fr 1fr; align-items: center; gap: 40px;
  max-width: calc(var(--max) + 2 * var(--gutter)); margin: 0 auto;
  padding: 110px var(--gutter) 50px;
}
.eyebrow {
  display: inline-flex; align-items: center; gap: 10px; margin: 0 0 26px;
  padding: 8px 14px 8px 10px; border-radius: 999px; font-size: 13.5px; color: var(--ink-2);
  background: var(--glass); border: 1px solid var(--line);
}
.dot { width: 10px; height: 10px; border-radius: 50%; background: var(--conic); animation: spin 4s linear infinite; box-shadow: 0 0 12px rgba(159, 137, 255, 0.8); }
.hero h1 { font-size: clamp(46px, 7.4vw, 96px); line-height: 0.98; }
.lead { font-size: clamp(18px, 1.7vw, 21px); color: var(--ink-2); max-width: 540px; margin: 28px 0 36px; }
.hero-ctas { display: flex; flex-wrap: wrap; gap: 12px; }
.hero-points { display: flex; flex-wrap: wrap; gap: 8px 22px; list-style: none; padding: 0; margin: 34px 0 0; color: var(--ink-3); font-size: 14px; }
.hero-points li::before { content: ""; display: inline-block; width: 6px; height: 6px; border-radius: 50%; background: var(--spectrum); margin: 0 9px 2px 0; }

.hero-stage { position: relative; height: min(720px, 78svh); display: grid; place-items: center; --pw: min(320px, calc(min(720px, 78svh) * 0.42)); }
.phone-hero { width: var(--pw); z-index: 3; animation: float 7s ease-in-out infinite; }
.phone-side { position: absolute; width: calc(var(--pw) * 0.82); z-index: 1; opacity: 0.5; filter: saturate(0.9) blur(0.5px); }
.phone-left { transform: translateX(-62%) rotate(-7deg); }
.phone-right { transform: translateX(62%) rotate(7deg); }
.pill-float { position: absolute; z-index: 5; bottom: 17%; left: 50%; transform: translateX(-62%); width: min(400px, 100%); }
@keyframes float { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-12px); } }

/* ---------- Magic Pill ---------- */
.pill {
  display: flex; align-items: center; gap: 12px; padding: 10px 18px 10px 10px;
  border-radius: 999px; position: relative; isolation: isolate;
  background: linear-gradient(100deg, rgba(111, 197, 255, 0.24), rgba(159, 137, 255, 0.22) 40%, rgba(255, 139, 193, 0.22) 75%, rgba(255, 182, 120, 0.2));
  border: 1px solid rgba(255, 255, 255, 0.22);
  backdrop-filter: blur(22px) saturate(180%); -webkit-backdrop-filter: blur(22px) saturate(180%);
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.25) inset, 0 20px 50px -15px rgba(0, 0, 0, 0.7);
  font-size: 15px; line-height: 1.35;
}
.pill-orb { position: relative; flex: none; width: 40px; height: 40px; border-radius: 50%; display: grid; place-items: center; }
.pill-orb::before {
  content: ""; position: absolute; inset: -5px; border-radius: 50%; background: var(--conic);
  filter: blur(6px); opacity: 0.9; animation: spin 6s linear infinite, breathe 2.6s ease-in-out infinite;
  z-index: -1;
}
.pill-orb img { width: 100%; height: 100%; border-radius: 50%; border: 1px solid rgba(255, 255, 255, 0.3); }
.pill-text { min-height: 1.35em; transition: opacity 0.35s; }
.pill-text.fade { opacity: 0; }
@keyframes spin { to { transform: rotate(360deg); } }
@keyframes breathe { 0%, 100% { scale: 1; } 50% { scale: 1.12; } }

/* ---------- Marquee ---------- */
.marquee { overflow: hidden; border-block: 1px solid var(--line); padding: 22px 0; margin-top: 30px; mask-image: linear-gradient(90deg, transparent, #000 10%, #000 90%, transparent); -webkit-mask-image: linear-gradient(90deg, transparent, #000 10%, #000 90%, transparent); }
.marquee-track { display: flex; gap: 28px; width: max-content; animation: marquee 40s linear infinite; align-items: center; }
.marquee span { font-size: clamp(22px, 3vw, 34px); font-weight: 600; letter-spacing: -0.02em; color: var(--ink-2); white-space: nowrap; }
.marquee i { font-style: normal; font-weight: 700; background: var(--spectrum); -webkit-background-clip: text; background-clip: text; color: transparent; font-size: 20px; }
@keyframes marquee { to { transform: translateX(-50%); } }

/* ---------- Intelligence ---------- */
.ai-stage { display: grid; place-items: center; margin-bottom: 64px; }
.ai-pill-wrap { width: min(720px, 100%); text-align: center; }
.pill-xl { padding: 14px 26px 14px 14px; font-size: clamp(16px, 2vw, 21px); text-align: left; min-height: 82px; }
.pill-xl .pill-orb { width: 54px; height: 54px; }
.caret { width: 2px; height: 1.2em; background: var(--ink); margin-left: -8px; animation: blink 1s steps(1) infinite; flex: none; }
@keyframes blink { 50% { opacity: 0; } }
.ai-context { margin: 16px 0 0; font-size: 13px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--ink-3); }
.ai-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.card { padding: 28px; }
.card h3 { font-size: 20px; margin-bottom: 10px; }
.card p { margin: 0; color: var(--ink-2); font-size: 15.5px; }

/* ---------- Tour ---------- */
.tour-grid { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(30px, 6vw, 90px); }
.tour-sticky { position: sticky; top: 0; height: 100svh; display: grid; place-items: center; }
.phone-tour { width: min(360px, calc(80svh * 0.46)); }

.chapter { min-height: 100svh; display: flex; flex-direction: column; justify-content: center; max-width: 480px; opacity: 0.35; transition: opacity 0.5s; }
.chapter.is-active { opacity: 1; }
.ch-num { font-family: var(--serif); font-style: italic; font-size: 64px; line-height: 1; background: var(--spectrum); -webkit-background-clip: text; background-clip: text; color: transparent; margin-bottom: 14px; }
.chapter .kicker { margin-bottom: 10px; }
.chapter h3 { font-size: clamp(30px, 3.6vw, 46px); line-height: 1.05; margin-bottom: 18px; }
.chapter p { color: var(--ink-2); margin: 0; font-size: 17.5px; }
.tags { list-style: none; padding: 0; margin: 24px 0 0; display: flex; flex-wrap: wrap; gap: 8px; }
.tags li, .chips li { padding: 7px 13px; border-radius: 999px; font-size: 13.5px; color: var(--ink-2); background: var(--glass); border: 1px solid var(--line); }
.phone-inline { display: none; }

/* ---------- Big screen rail ---------- */
.bigscreen { max-width: none; padding-inline: 0; }
.bigscreen .section-head { padding-inline: var(--gutter); }
.rail {
  display: flex; gap: 22px; overflow-x: auto; scroll-snap-type: x mandatory; scrollbar-width: none;
  padding: 10px max(var(--gutter), calc((100vw - var(--max)) / 2)) 30px;
  scroll-padding-inline: max(var(--gutter), calc((100vw - var(--max)) / 2));
}
.rail::-webkit-scrollbar { display: none; }
.slide { flex: none; width: min(860px, 86vw); margin: 0; scroll-snap-align: start; }
.fold {
  position: relative; display: block; container-type: inline-size;
  border-radius: 4.4cqw;
  background: linear-gradient(90deg, #5b5e66, #c7cad1 3%, #8a8d95 8%, #3b3d43 50%, #8a8d95 92%, #c7cad1 97%, #5b5e66);
  box-shadow: 0 50px 100px -40px rgba(0, 0, 0, 0.9), 0 20px 50px -25px rgba(80, 90, 255, 0.25);
}
.fold img {
  display: block; width: calc(100% - 1.1cqw); margin: 0.55cqw; aspect-ratio: 2853 / 2007; object-fit: cover; box-sizing: border-box;
  border: 1.5cqw solid #050506; border-radius: 4cqw; background: #000;
}
/* Top button on the Duo's edge */
.fold::before {
  content: ""; position: absolute; top: -0.45cqw; right: 12%; width: 7%; height: 0.5cqw;
  border-radius: 0.5cqw 0.5cqw 0 0; background: linear-gradient(180deg, #9a9da5, #2c2e33);
}
.slide figcaption { margin-top: 14px; color: var(--ink-3); font-size: 14px; padding-left: 4px; }
.rail-ctrl { display: flex; justify-content: center; gap: 10px; }
.round { width: 46px; height: 46px; border-radius: 50%; border: 1px solid var(--line); background: var(--glass); color: var(--ink); font-size: 24px; line-height: 1; cursor: pointer; backdrop-filter: blur(12px); }
.round:hover { background: var(--glass-2); }

/* ---------- Sources ---------- */
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.step { padding: 32px 28px; position: relative; }
.step-n { display: grid; place-items: center; width: 38px; height: 38px; border-radius: 50%; background: var(--spectrum); color: #07080f; font-weight: 700; margin-bottom: 22px; }
.step h3 { font-size: 22px; margin-bottom: 10px; }
.step p { color: var(--ink-2); margin: 0; font-size: 15.5px; }
.chips { list-style: none; padding: 0; margin: 22px 0 0; display: flex; flex-wrap: wrap; gap: 6px; }

/* ---------- Features ---------- */
.feat-grid { display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid var(--line); border-left: 1px solid var(--line); counter-reset: feat; }
.feat { padding: 30px 26px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); counter-increment: feat; transition: background 0.3s; }
.feat:hover { background: rgba(255, 255, 255, 0.03); }
.ico { display: grid; place-items: center; width: 34px; height: 34px; border-radius: 50%; margin-bottom: 20px; position: relative; font: italic 17px/1 var(--serif); }
.ico::before { content: ""; position: absolute; inset: 0; border-radius: 50%; padding: 1.5px; background: var(--conic); -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0); -webkit-mask-composite: xor; mask-composite: exclude; }
.ico::after { content: counter(feat, decimal-leading-zero); color: var(--ink-2); font-size: 13px; font-family: var(--sans); font-style: normal; font-weight: 600; }
.feat h3 { font-size: 18px; margin-bottom: 8px; }
.feat p { margin: 0; color: var(--ink-2); font-size: 15px; }

/* ---------- Design ---------- */
.design-wrap { display: grid; grid-template-columns: 1.1fr 1fr; gap: 60px; align-items: center; }
.design-copy .sub { margin-left: 0; }
.principles { margin: 40px 0 0; display: grid; grid-template-columns: 1fr 1fr; gap: 26px 30px; }
.principles dt { font-weight: 600; margin-bottom: 6px; }
.principles dd { margin: 0; color: var(--ink-2); font-size: 15px; }
.design-shots { position: relative; display: flex; justify-content: center; gap: 18px; }
.design-shots .phone { width: 46%; }
.design-shots .phone:last-child { transform: translateY(70px); }

/* ---------- Plans ---------- */
.plans { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; max-width: 900px; margin: 0 auto; }
.plan { padding: 36px 32px; position: relative; }
.plan h3 { font-size: 28px; }
.price { margin: 6px 0 24px; color: var(--ink-2); font-size: 17px; }
.plan ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 12px; }
.plan li { padding-left: 28px; position: relative; color: var(--ink-2); font-size: 15.5px; }
.plan li::before { content: "✓"; position: absolute; left: 0; top: 0; font-weight: 700; color: var(--cool); }
.plan-plus { border-color: transparent; background: linear-gradient(160deg, rgba(159, 137, 255, 0.2), rgba(255, 139, 193, 0.1) 60%, rgba(255, 182, 120, 0.1)); }
.plan-plus::after { content: ""; position: absolute; inset: 0; border-radius: inherit; padding: 1px; background: var(--spectrum); -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0); -webkit-mask-composite: xor; mask-composite: exclude; pointer-events: none; }
.plan-plus h3 { background: var(--spectrum); -webkit-background-clip: text; background-clip: text; color: transparent; display: inline-block; }
.plan-plus li { color: var(--ink); }
.badge { position: absolute; top: 22px; right: 22px; font-size: 12px; font-weight: 600; padding: 6px 11px; border-radius: 999px; background: var(--ink); color: #07080f; }

/* ---------- FAQ ---------- */
.faq-list { max-width: 820px; margin: 0 auto; display: grid; gap: 10px; }
.faq details { border-radius: 20px; padding: 0 24px; }
.faq summary { cursor: pointer; padding: 22px 30px 22px 0; font-weight: 600; font-size: 17px; list-style: none; position: relative; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; position: absolute; right: 0; top: 50%; transform: translateY(-50%); font-size: 24px; font-weight: 300; color: var(--ink-3); transition: transform 0.3s; }
.faq details[open] summary::after { transform: translateY(-50%) rotate(45deg); }
.faq details p { margin: 0 0 22px; color: var(--ink-2); }

/* ---------- Final ---------- */
.final { text-align: center; padding: clamp(120px, 16vw, 200px) var(--gutter) clamp(90px, 12vw, 140px); position: relative; }
.final-mark { width: 120px; height: 120px; margin: 0 auto 36px; border-radius: 50%; box-shadow: 0 0 80px 10px rgba(159, 137, 255, 0.35), 0 0 160px 40px rgba(255, 139, 193, 0.15); animation: float 7s ease-in-out infinite; }
.final .hero-ctas { justify-content: center; margin-top: 36px; }

/* ---------- Footer ---------- */
.foot { border-top: 1px solid var(--line); padding: 40px var(--gutter) 50px; max-width: calc(var(--max) + 2 * var(--gutter)); margin: 0 auto; display: grid; grid-template-columns: auto 1fr; gap: 20px 40px; align-items: center; }
.foot-brand { display: flex; align-items: center; gap: 10px; font-weight: 600; }
.foot-brand img { border-radius: 50%; }
.foot-links { display: flex; flex-wrap: wrap; gap: 8px 24px; justify-content: flex-end; font-size: 14px; color: var(--ink-2); }
.foot-links a:hover { color: var(--ink); }
.foot-legal { grid-column: 1 / -1; margin: 0; font-size: 12.5px; color: var(--ink-3); max-width: 900px; }

/* ---------- Reveal ---------- */
.reveal { opacity: 0; transform: translateY(26px); transition: opacity 0.9s cubic-bezier(.2, .7, .2, 1), transform 0.9s cubic-bezier(.2, .7, .2, 1); }
.reveal.in { opacity: 1; transform: none; }
.no-js .reveal { opacity: 1; transform: none; }

/* ---------- Responsive ---------- */
@media (max-width: 980px) {
  .nav-links { display: none; }
  .hero { grid-template-columns: 1fr; text-align: center; padding-top: 130px; gap: 50px; min-height: 0; }
  .lead { margin-inline: auto; }
  .hero-ctas, .hero-points { justify-content: center; }
  .hero-stage { height: auto; padding-bottom: 40px; --pw: min(320px, 70vw); }
  .ai-grid, .steps { grid-template-columns: 1fr 1fr; }
  .feat-grid { grid-template-columns: 1fr 1fr; }
  .design-wrap { grid-template-columns: 1fr; }
  .design-shots { max-width: 520px; margin: 0 auto 70px; }
  .tour-grid { grid-template-columns: 1fr; }
  .tour-sticky { display: none; }
  .chapter { min-height: 0; opacity: 1; max-width: 560px; margin: 0 auto 90px; text-align: center; align-items: center; }
  .chapter .tags { justify-content: center; }
  .phone-inline { display: block; width: min(300px, 74vw); margin-top: 36px; }
}
@media (max-width: 640px) {
  body { font-size: 16px; }
  .nav-word { display: none; }
  .hero-stage { --pw: min(290px, 72vw); }
  .phone-side { display: none; }
  .pill-float { bottom: 12%; transform: translateX(-50%); width: calc(100vw - 32px); max-width: 380px; font-size: 14px; }
  .ai-grid, .steps, .plans, .feat-grid { grid-template-columns: 1fr; }
  .principles { grid-template-columns: 1fr; }
  .pill-xl { border-radius: 30px; }
  .foot { grid-template-columns: 1fr; }
  .foot-links { justify-content: flex-start; }
  .badge { position: static; display: inline-block; margin-bottom: 14px; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
  .reveal { opacity: 1; transform: none; }
  html { scroll-behavior: auto; }
}