@media (max-width: 1024px) {
  :root { --shell: min(100% - 48px, 940px); }
  .nav-links { gap: 18px; }
  .nav-links a:nth-last-child(-n+2) { display: none; }
  .hero-layout { grid-template-columns: .9fr 1.1fr; }
  .hero-stage { min-height: 570px; }
  .phone-main { width: 46%; }
  .phone-secondary { width: 39%; }
  .difference-grid, .editorial-grid, .trust-grid { gap: 54px; }
  .phone-insight { width: 270px; }
  .training-phone { left: 9%; }
  .watch-frame { right: 10%; }
  .faq-grid { gap: 54px; }
}

@media (max-width: 768px) {
  :root { --shell: calc(100% - 40px); }
  .section { padding: 96px 0; }
  .narrow { width: calc(100% - 40px); }
  .nav { gap: 18px; }
  .nav-links { display: none; }
  .launch-status { margin-left: auto; }
  .hero-layout { min-height: auto; grid-template-columns: 1fr; padding-block: 76px 30px; }
  .hero-copy { max-width: 620px; }
  .hero-stage { min-height: 610px; width: min(620px, 100%); margin: 0 auto; }
  .phone-main { width: 44%; right: 12%; }
  .phone-secondary { width: 39%; left: 12%; }
  .split-heading { grid-template-columns: 1fr; gap: 16px; }
  .section-heading { margin-bottom: 52px; }
  .section-heading > p:last-child { margin-top: 10px; }
  .loop-list { grid-template-columns: repeat(2, 1fr); }
  .difference-grid, .editorial-grid, .trust-grid, .faq-grid { grid-template-columns: 1fr; gap: 56px; }
  .insight-visual { min-height: 630px; }
  .day-timeline { grid-template-columns: repeat(2, 1fr); gap: 34px 0; }
  .day-timeline li:nth-child(3), .day-timeline li:nth-child(4) { border-top: 1px solid var(--line-dark); padding-top: 28px; }
  .day-timeline li:nth-child(3)::before, .day-timeline li:nth-child(4)::before { top: -5px; }
  .training-stage { min-height: 650px; }
  .training-phone { width: 285px; left: 7%; }
  .watch-frame { width: 260px; right: 7%; top: 17%; }
  .evidence-card { min-height: 580px; }
  .evidence-phone { width: 230px; }
  .trust-points article { grid-template-columns: 44px 140px 1fr; }
  .compatibility { grid-template-columns: 120px 1fr; }
  .compatibility p:last-child { grid-column: 2; }
  .footer-inner { grid-template-columns: 1fr auto; padding-top: 42px; }
  .footer-inner > p:not(.copyright) { grid-column: 1 / -1; }
}

@media (max-width: 560px) {
  :root { --shell: calc(100% - 32px); }
  html { scroll-padding-top: 72px; }
  .section { padding: 78px 0; }
  .narrow { width: calc(100% - 32px); }
  h1 { font-size: clamp(49px, 14vw, 66px); }
  h2 { font-size: clamp(36px, 10vw, 48px); }
  .large-copy { font-size: 20px; }
  .site-header { height: 64px; }
  .brand { font-size: 17px; }
  .brand img { width: 32px; height: 32px; }
  .launch-status { font-size: 12px; }
  .hero { min-height: auto; }
  .hero-layout { padding-top: 64px; }
  .hero-lead { font-size: 18px; }
  .hero-actions { align-items: stretch; flex-direction: column; }
  .hero-actions > * { width: 100%; }
  .hero-stage { min-height: 500px; }
  .phone { border-width: 4px; border-radius: 34px; }
  .phone-main { width: 49%; right: 6%; }
  .phone-secondary { width: 43%; left: 4%; bottom: 2%; }
  .hero-stage figcaption { right: 0; bottom: 0; }
  .problem { text-align: left; }
  .difference-flow { grid-template-columns: 1fr; gap: 16px; }
  .difference-flow article { min-height: 0; }
  .difference-flow article > span { margin-bottom: 32px; }
  .flow-arrow { transform: rotate(90deg); justify-self: center; }
  .loop-list { grid-template-columns: 1fr; }
  .loop-list li { min-height: 210px; padding: 28px; }
  .loop-list li > span { margin-bottom: 36px; }
  .insight-visual { min-height: 570px; }
  .phone-insight { width: 245px; right: -3%; }
  .insight-quote { left: 26px; top: 30px; }
  .day-timeline { grid-template-columns: 1fr; gap: 0; }
  .scenario-signal { grid-template-columns: 1fr; gap: 18px; padding: 26px; }
  .signal-arrow { transform: rotate(90deg); justify-self: center; }
  .day-timeline li, .day-timeline li:nth-child(3), .day-timeline li:nth-child(4) { padding: 24px 0; border-top: 1px solid var(--line-dark); }
  .day-timeline li::before, .day-timeline li:nth-child(3)::before, .day-timeline li:nth-child(4)::before { display: none; }
  .training-stage { min-height: 560px; }
  .training-phone { width: 200px; left: -1%; bottom: -8%; }
  .watch-frame { width: 180px; right: 1%; top: 20%; }
  .training-stage figcaption { right: 16px; bottom: 16px; width: 180px; text-align: right; }
  .evidence-grid, .plan-grid { grid-template-columns: 1fr; }
  .evidence-card { min-height: 540px; padding: 28px; }
  .evidence-card h3 { font-size: 27px; }
  .evidence-nutrition { grid-column: auto; min-height: 420px; align-items: start; }
  .nutrition-lines { right: 7%; bottom: 9%; width: 86%; height: 42%; }
  .plan-card { min-height: 400px; padding: 30px; }
  .trust-points article { grid-template-columns: 38px 1fr; }
  .trust-points article p { grid-column: 2; }
  .compatibility { grid-template-columns: 1fr; gap: 16px; }
  .compatibility p:last-child { grid-column: auto; }
  .faq-grid { gap: 40px; }
  .faq-list summary { font-size: 17px; }
  .final-section { padding: 110px 0; }
  .final-section::after { left: 20%; }
  .footer-inner { display: flex; min-height: 0; flex-direction: column; align-items: flex-start; padding: 48px 0 0; }
  .footer-links { flex-wrap: wrap; }
  .footer-legal { width: 100%; align-items: flex-start; flex-direction: column; }
  .filing-records { justify-content: flex-start; }
  .legal-page { padding: 72px 0 96px; }
  .legal-content { width: calc(100% - 32px); }
  .legal-content h2 { margin-top: 42px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
}

@media (prefers-reduced-motion: no-preference) {
  .hero-copy { animation: enter .75s ease-out both; }
  .hero-stage { animation: enter .9s .12s ease-out both; }
  @keyframes enter { from { opacity: 0; transform: translateY(18px); } to { opacity: 1; transform: translateY(0); } }
}