:root {
  --ink: #11120f;
  --muted: #6b6d65;
  --paper: #f4f4ef;
  --white: #ffffff;
  --acid: #d9ff42;
  --line: rgba(17, 18, 15, 0.14);
  --header-height: 82px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  -webkit-font-smoothing: antialiased;
}

body.is-loading { overflow: hidden; }
a { color: inherit; text-decoration: none; }
button, select { font: inherit; }

.noise {
  position: fixed;
  inset: 0;
  z-index: 100;
  pointer-events: none;
  opacity: .035;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 140 140' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.65'/%3E%3C/svg%3E");
}

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--header-height);
  z-index: 50;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  padding: 0 clamp(22px, 4vw, 72px);
  border-bottom: 1px solid transparent;
  transition: background .3s ease, border-color .3s ease, height .3s ease;
}
.site-header.is-scrolled {
  height: 68px;
  background: rgba(244,244,239,.9);
  border-color: var(--line);
  backdrop-filter: blur(18px);
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  width: max-content;
  font-size: 15px;
  font-weight: 850;
  letter-spacing: .16em;
}
.brand-mark {
  width: 24px;
  height: 24px;
  border: 6px solid var(--ink);
  border-radius: 50%;
  position: relative;
}
.brand-mark::after {
  content: "";
  position: absolute;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--acid);
  top: 3px;
  right: 3px;
}
.desktop-nav { display: flex; gap: 34px; font-size: 13px; font-weight: 650; }
.desktop-nav a { position: relative; }
.desktop-nav a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 100%;
  bottom: -7px;
  height: 2px;
  background: var(--ink);
  transition: right .25s ease;
}
.desktop-nav a:hover::after { right: 0; }
.header-cta {
  justify-self: end;
  padding: 12px 18px;
  border: 1px solid var(--ink);
  border-radius: 999px;
  font-size: 12px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: .08em;
  transition: color .2s ease, background .2s ease;
}
.header-cta:hover { color: var(--paper); background: var(--ink); }
.cta-arrow { display: none; }

.scroll-story { height: 365vh; position: relative; }
.story-viewport {
  position: sticky;
  top: 0;
  height: 100vh;
  min-height: 620px;
  overflow: hidden;
  background: #f7f7f4;
}
.tire-canvas,
.tire-poster {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  z-index: 0;
}

.sequence-loader {
  position: absolute;
  left: 50%;
  bottom: 76px;
  z-index: 8;
  width: min(220px, 60vw);
  transform: translateX(-50%);
  display: grid;
  gap: 8px;
  color: #44463f;
  font-size: 9px;
  font-weight: 800;
  letter-spacing: .14em;
  text-align: center;
  text-transform: uppercase;
  transition: opacity .35s ease, visibility .35s ease;
}
.sequence-loader > div {
  height: 2px;
  overflow: hidden;
  background: rgba(17,18,15,.14);
}
.sequence-loader i {
  display: block;
  width: 0;
  height: 100%;
  background: var(--ink);
  transition: width .18s ease;
}
.sequence-loader.is-ready {
  opacity: 0;
  visibility: hidden;
}

.video-wash {
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background:
    linear-gradient(90deg, rgba(247,247,244,.10), rgba(247,247,244,0) 32%, rgba(247,247,244,0) 72%, rgba(247,247,244,.08)),
    linear-gradient(180deg, rgba(247,247,244,.20), transparent 22%, transparent 78%, rgba(247,247,244,.28));
}
.story-grid {
  position: absolute;
  inset: 0;
  z-index: 2;
  pointer-events: none;
  opacity: .35;
  background-image:
    linear-gradient(to right, transparent calc(25% - .5px), rgba(17,18,15,.07) 25%, transparent calc(25% + .5px)),
    linear-gradient(to right, transparent calc(50% - .5px), rgba(17,18,15,.06) 50%, transparent calc(50% + .5px)),
    linear-gradient(to right, transparent calc(75% - .5px), rgba(17,18,15,.07) 75%, transparent calc(75% + .5px));
}
.chapter {
  position: absolute;
  z-index: 4;
  width: min(620px, 44vw);
  opacity: 0;
  transform: translateY(34px);
  pointer-events: none;
  isolation: isolate;
  text-shadow:
    0 1px 0 rgba(247,247,244,.92),
    0 0 18px rgba(247,247,244,.95),
    0 0 34px rgba(247,247,244,.8);
  transition: opacity .35s ease, transform .45s cubic-bezier(.2,.8,.2,1);
}
.chapter::before {
  content: "";
  position: absolute;
  z-index: -1;
  inset: -24px -42px;
  pointer-events: none;
  background: radial-gradient(ellipse at 42% 50%,
    rgba(247,247,244,.96) 0%,
    rgba(247,247,244,.82) 46%,
    rgba(247,247,244,.25) 72%,
    rgba(247,247,244,0) 100%);
  filter: blur(9px);
}
.chapter.is-active { opacity: 1; transform: translateY(0); pointer-events: auto; }
.chapter-one { top: 23%; right: clamp(28px, 7vw, 120px); }
.chapter-two { left: clamp(28px, 7vw, 120px); bottom: 17%; }
.chapter-three { top: 25%; left: clamp(28px, 7vw, 120px); }
.eyebrow {
  margin: 0 0 22px;
  font-size: 11px;
  font-weight: 850;
  letter-spacing: .18em;
  text-transform: uppercase;
}
h1, h2 { margin: 0; font-weight: 780; letter-spacing: -.055em; line-height: .98; }
h1 { font-size: clamp(52px, 6.2vw, 104px); }
h2 { font-size: clamp(45px, 5.1vw, 84px); }
h1 span, h2 span { font-weight: 360; }
.chapter-copy {
  max-width: 500px;
  margin: 28px 0 32px;
  color: #474942;
  font-size: clamp(15px, 1.2vw, 18px);
  line-height: 1.65;
}
.primary-button, .secondary-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 38px;
  min-height: 54px;
  padding: 0 22px;
  border: 1px solid var(--ink);
  border-radius: 999px;
  font-size: 13px;
  font-weight: 780;
  transition: transform .2s ease, background .2s ease, color .2s ease;
}
.primary-button { color: var(--paper); background: var(--ink); }
.primary-button:hover, .secondary-button:hover { transform: translateY(-2px); }
.primary-button:hover { color: var(--ink); background: var(--acid); }
.primary-button.dark { background: var(--ink); }
.text-link {
  display: inline-flex;
  gap: 16px;
  padding-bottom: 7px;
  border-bottom: 1px solid var(--ink);
  font-size: 14px;
  font-weight: 760;
}
.spec-row { display: flex; gap: 30px; margin-top: 34px; }
.spec-row div { padding-right: 30px; border-right: 1px solid var(--line); }
.spec-row div:last-child { border: 0; }
.spec-row strong { display: block; font-size: clamp(24px, 3vw, 42px); letter-spacing: -.05em; }
.spec-row span { display: block; margin-top: 6px; color: var(--muted); font-size: 11px; text-transform: uppercase; letter-spacing: .1em; }

.story-progress {
  position: absolute;
  right: clamp(26px, 4vw, 70px);
  top: 50%;
  z-index: 5;
  transform: translateY(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
}
.progress-number { font-size: 10px; font-weight: 800; }
.progress-track { width: 2px; height: 128px; background: rgba(17,18,15,.16); position: relative; overflow: hidden; }
.progress-track span { position: absolute; inset: 0 0 auto; height: 0; background: var(--ink); }
.scroll-cue {
  position: absolute;
  z-index: 5;
  left: 50%;
  bottom: 28px;
  transform: translateX(-50%);
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 11px;
  font-weight: 750;
  text-transform: uppercase;
  letter-spacing: .12em;
  transition: opacity .3s ease;
}
.scroll-icon { display: grid; place-items: center; width: 28px; height: 28px; border: 1px solid var(--ink); border-radius: 50%; animation: bounce 1.8s ease-in-out infinite; }
@keyframes bounce { 0%,100% { transform: translateY(0); } 50% { transform: translateY(5px); } }

.trust-strip {
  min-height: 94px;
  display: flex;
  align-items: center;
  justify-content: space-around;
  gap: 20px;
  padding: 20px clamp(20px, 4vw, 70px);
  color: var(--paper);
  background: var(--ink);
  font-size: 11px;
  font-weight: 750;
  letter-spacing: .11em;
  text-transform: uppercase;
}
.trust-strip span { width: 4px; height: 4px; border-radius: 50%; background: var(--acid); }

.section { padding: clamp(90px, 11vw, 170px) clamp(24px, 7vw, 120px); }
.section-heading { display: grid; grid-template-columns: .55fr 1.45fr; align-items: start; margin-bottom: 70px; }
.section-heading .eyebrow { padding-top: 10px; }
.section-heading h2 { max-width: 940px; }
.services { background: #e7e7e0; }
.service-grid { border-top: 1px solid var(--line); }
.service-card {
  min-height: 210px;
  display: grid;
  grid-template-columns: 100px 1fr 60px;
  gap: 30px;
  align-items: center;
  padding: 34px 10px;
  border-bottom: 1px solid var(--line);
  transition: padding .3s ease, background .3s ease;
}
.service-card:hover { padding-left: 28px; padding-right: 28px; background: rgba(255,255,255,.45); }
.service-number { align-self: start; font-size: 12px; font-weight: 850; }
.service-tag { margin: 0 0 8px; color: var(--muted); font-size: 10px; font-weight: 850; letter-spacing: .15em; }
.service-card h3 { margin: 0 0 13px; font-size: clamp(25px, 3vw, 44px); letter-spacing: -.04em; }
.service-card p:last-child { max-width: 690px; margin: 0; color: var(--muted); line-height: 1.6; }
.card-arrow { justify-self: end; display: grid; place-items: center; width: 48px; height: 48px; border: 1px solid var(--ink); border-radius: 50%; }
.service-card-featured .card-arrow { background: var(--acid); }

.tire-finder {
  display: grid;
  grid-template-columns: .9fr 1.1fr;
  gap: clamp(60px, 9vw, 150px);
  align-items: center;
  background: var(--paper);
}
.finder-copy h2 { margin-bottom: 28px; }
.finder-copy > p:last-child { max-width: 550px; color: var(--muted); line-height: 1.7; }
.finder-form {
  display: grid;
  grid-template-columns: 1fr auto 1fr auto 1fr;
  align-items: end;
  gap: 14px;
  padding: 38px;
  color: var(--paper);
  background: var(--ink);
  border-radius: 4px;
  box-shadow: 0 30px 70px rgba(17,18,15,.18);
}
.measure-group { display: flex; flex-direction: column; gap: 10px; }
.measure-group label { color: #a9aba3; font-size: 10px; font-weight: 800; letter-spacing: .12em; text-transform: uppercase; }
.measure-group select {
  width: 100%;
  appearance: none;
  border: 0;
  border-bottom: 1px solid rgba(255,255,255,.24);
  padding: 10px 0 14px;
  color: var(--paper);
  background: transparent;
  font-size: clamp(28px, 3vw, 48px);
  font-weight: 700;
  outline: none;
}
.measure-group select option { color: var(--ink); }
.measure-separator { padding-bottom: 17px; color: #73756e; font-size: 28px; }
.finder-form button {
  grid-column: 1 / -1;
  justify-self: start;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0;
  width: auto;
  min-height: 54px;
  margin-top: 20px;
  padding: 0 22px;
  border: 0;
  border-radius: 999px;
  color: var(--ink);
  background: var(--acid);
  font-weight: 800;
  cursor: pointer;
  overflow: hidden;
  transition: transform .22s ease, padding-right .28s ease, box-shadow .22s ease;
}
.finder-form button:hover,
.finder-form button:focus-visible {
  transform: translateY(-2px);
  padding-right: 7px;
  box-shadow: 0 16px 28px rgba(17,18,15,.18);
}
.finder-form .button-label { white-space: nowrap; }
.wheel-chip {
  display: inline-grid;
  place-items: center;
  border-radius: 50%;
  color: var(--paper);
  background: var(--ink);
}
.wheel-chip .wheel-icon {
  width: 62%;
  height: 62%;
}
.finder-form .button-wheel {
  width: 0;
  height: 40px;
  margin-left: 0;
  opacity: 0;
  transform: translateX(12px);
  transition:
    width .28s ease,
    margin-left .28s ease,
    opacity .2s ease,
    transform .28s ease;
}
.finder-form button:hover .button-wheel,
.finder-form button:focus-visible .button-wheel {
  width: 40px;
  margin-left: 14px;
  opacity: 1;
  transform: translateX(0);
}
.finder-form button:hover .button-wheel .wheel-icon,
.finder-form button:focus-visible .button-wheel .wheel-icon {
  animation: spinWheel .82s linear infinite;
}
.form-feedback { grid-column: 1 / -1; min-height: 1.2em; margin: 0; color: #cfd0ca; font-size: 12px; text-align: center; }

.proof {
  display: grid;
  grid-template-columns: .45fr 1.55fr;
  gap: 70px;
  align-items: start;
  color: var(--paper);
  background: #1c1d19;
}
.proof-stat strong { display: block; color: var(--acid); font-size: clamp(80px, 12vw, 180px); line-height: .8; letter-spacing: -.07em; }
.proof-stat span { display: block; margin-top: 24px; color: #989a93; font-size: 11px; text-transform: uppercase; letter-spacing: .15em; }
blockquote { margin: 0; font-size: clamp(30px, 4.2vw, 66px); line-height: 1.12; letter-spacing: -.04em; }
blockquote cite { display: block; margin-top: 40px; color: #9d9f98; font-size: 12px; font-style: normal; letter-spacing: .08em; text-transform: uppercase; }

.contact {
  position: relative;
  min-height: 760px;
  overflow: hidden;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}
.contact h2 { position: relative; z-index: 2; }
.contact > p:not(.eyebrow) { position: relative; z-index: 2; max-width: 650px; margin: 32px auto; color: var(--muted); font-size: 17px; line-height: 1.7; }
.contact-actions { position: relative; z-index: 2; display: flex; gap: 12px; }
.contact small { position: relative; z-index: 2; margin-top: 24px; color: #8a8c84; }
.contact-orbit { position: absolute; width: min(72vw, 950px); aspect-ratio: 1; border: 1px solid var(--line); border-radius: 50%; }
.contact-orbit::before, .contact-orbit::after { content: ""; position: absolute; inset: 13%; border: 1px solid var(--line); border-radius: 50%; }
.contact-orbit::after { inset: 28%; }
.contact-orbit .orbit-wheel {
  position: absolute;
  top: 50%;
  left: -25px;
  width: 50px;
  height: 50px;
  animation: orbit 14s linear infinite;
  transform-origin: calc(min(36vw, 475px) + 25px) 25px;
}
.contact-orbit .orbit-wheel .wheel-chip {
  width: 50px;
  height: 50px;
  box-shadow: 0 10px 24px rgba(17,18,15,.16);
}
.contact-orbit .orbit-wheel .wheel-icon {
  animation: spinWheel 1s linear infinite;
}
@keyframes orbit { to { transform: rotate(360deg); } }
@keyframes spinWheel { to { transform: rotate(360deg); } }

footer {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  min-height: 140px;
  padding: 30px clamp(24px, 7vw, 120px);
  color: var(--paper);
  background: var(--ink);
  border-top: 1px solid rgba(255,255,255,.1);
  font-size: 12px;
}
footer p:nth-child(2) { color: #8f918a; }
footer p:last-child { justify-self: end; }
.footer-brand .brand-mark { border-color: var(--paper); }

@media (max-width: 900px) {
  :root { --header-height: 70px; }
  .site-header { grid-template-columns: 1fr auto; }
  .desktop-nav { display: none; }
  .header-cta { font-size: 10px; padding: 10px 14px; }
  .scroll-story { height: 420vh; }
  .story-viewport { min-height: 590px; }
  .tire-canvas,
.tire-poster { object-fit: cover; object-position: 50% center; }
  .story-grid { display: none; }
  .chapter { width: calc(100% - 48px); left: 24px; right: auto; top: auto; bottom: 12%; padding: 24px; background: rgba(247,247,244,.86); backdrop-filter: blur(12px); border: 1px solid rgba(17,18,15,.08); }
  .chapter-one, .chapter-two, .chapter-three { left: 24px; right: auto; top: auto; bottom: 11%; }
  h1 { font-size: clamp(46px, 12vw, 70px); }
  h2 { font-size: clamp(40px, 10vw, 62px); }
  .chapter-copy { display: none; }
  .spec-row { gap: 12px; margin-top: 20px; }
  .spec-row div { padding-right: 12px; }
  .spec-row strong { font-size: 25px; }
  .spec-row span { font-size: 8px; }
  .story-progress { right: 10px; }
  .scroll-cue { display: none; }
  .trust-strip { flex-wrap: wrap; justify-content: center; min-height: 120px; }
  .trust-strip p { margin: 8px 0; }
  .section-heading, .tire-finder, .proof { grid-template-columns: 1fr; }
  .section-heading { gap: 20px; }
  .service-card { grid-template-columns: 50px 1fr; }
  .card-arrow { display: none; }
  .finder-form { padding: 24px; }
  .finder-form button { justify-self: stretch; }
  .proof { gap: 50px; }
  .proof-stat strong { font-size: 110px; }
  .contact { min-height: 680px; }
  .contact-actions { flex-direction: column; width: min(100%, 380px); }
  footer { grid-template-columns: 1fr; gap: 20px; text-align: center; }
  footer > * { justify-self: center !important; }
}

@media (max-width: 560px) {
  .site-header { padding-inline: 18px; }
  .brand { font-size: 13px; }
  .header-cta { padding: 9px 12px; }
  .chapter { width: calc(100% - 28px); left: 14px; bottom: 7%; padding: 18px; }
  .chapter-one, .chapter-two, .chapter-three { left: 14px; bottom: 7%; }
  .eyebrow { margin-bottom: 12px; }
  h1 { font-size: 43px; }
  h2 { font-size: 39px; }
  .primary-button { min-height: 46px; }
  .story-progress { display: none; }
  .section { padding: 84px 20px; }
  .service-card { grid-template-columns: 36px 1fr; gap: 12px; }
  .tire-finder { gap: 44px; }
  .finder-form { grid-template-columns: 1fr auto 1fr; }
  .finder-form .measure-group:nth-of-type(3) { grid-column: 1 / -1; margin-top: 10px; }
  .finder-form .measure-separator:nth-of-type(2) { display: none; }
  .contact-orbit { width: 130vw; }
}


/* =========================================================
   RESPONSIVE MÓVIL
   Estas reglas solo se aplican por debajo de 900 px.
   La composición y dimensiones de escritorio permanecen intactas.
   ========================================================= */

@media (max-width: 900px) {
  html,
  body {
    width: 100%;
    max-width: 100%;
    overflow-x: clip;
  }

  body {
    padding-bottom: env(safe-area-inset-bottom, 0);
  }

  :root {
    --mobile-safe-top: env(safe-area-inset-top, 0px);
    --mobile-safe-bottom: env(safe-area-inset-bottom, 0px);
    --header-height: calc(64px + var(--mobile-safe-top));
  }

  .noise {
    opacity: .022;
  }

  .site-header,
  .site-header.is-scrolled {
    height: var(--header-height);
    padding:
      var(--mobile-safe-top)
      16px
      0;
    grid-template-columns: minmax(0, 1fr) auto;
    background: rgba(244,244,239,.94);
    border-color: var(--line);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
  }

  .brand {
    gap: 8px;
    min-width: 0;
    font-size: 12px;
    letter-spacing: .14em;
  }

  .brand-mark {
    flex: 0 0 auto;
    width: 22px;
    height: 22px;
    border-width: 5px;
  }

  .brand-mark::after {
    width: 5px;
    height: 5px;
    top: 3px;
    right: 3px;
  }

  .desktop-nav {
    display: none;
  }

  .header-cta {
    min-height: 38px;
    padding: 0 14px;
    font-size: 9px;
    letter-spacing: .075em;
    white-space: nowrap;
  }

  /*
   * La secuencia conserva su proporción 16:9 en móvil.
   * Así se ve el cuadro completo del video en vez de recortarlo
   * como ocurriría al cubrir una pantalla vertical.
   */
  .scroll-story {
    height: 340svh;
  }

  .story-viewport {
    height: 100svh;
    min-height: 0;
    overflow: hidden;
  }

  .tire-canvas,
  .tire-poster {
    inset: auto;
    top: calc(var(--header-height) + 10px);
    left: 0;
    width: 100vw;
    height: 56.25vw;
    max-height: none;
    object-fit: contain;
    object-position: center;
    pointer-events: none;
  }

  .video-wash {
    top: var(--header-height);
    bottom: auto;
    height: calc(56.25vw + 28px);
    background:
      linear-gradient(90deg, rgba(247,247,244,.06), transparent 18%, transparent 82%, rgba(247,247,244,.06)),
      linear-gradient(180deg, rgba(247,247,244,.10), transparent 28%, rgba(247,247,244,.16));
  }

  .story-grid {
    display: none;
  }

  .sequence-loader {
    top: calc(var(--header-height) + 56.25vw - 4px);
    bottom: auto;
    width: min(220px, 64vw);
  }

  .chapter,
  .chapter-one,
  .chapter-two,
  .chapter-three {
    top: calc(var(--header-height) + 56.25vw + 22px);
    right: auto;
    left: 12px;
    bottom: auto;
    width: calc(100% - 24px);
    max-width: none;
    max-height: calc(100svh - var(--header-height) - 56.25vw - 40px);
    padding: 18px;
    overflow: hidden;
    border: 1px solid rgba(17,18,15,.10);
    border-radius: 22px;
    color: var(--ink);
    background: rgba(247,247,244,.94);
    box-shadow: 0 18px 46px rgba(17,18,15,.12);
    text-shadow: none;
    backdrop-filter: blur(18px) saturate(1.05);
    -webkit-backdrop-filter: blur(18px) saturate(1.05);
    /* Un solo capítulo visible: evita texto superpuesto al hacer scroll. */
    transition: none;
  }

  .chapter::before {
    display: none;
  }

  .chapter .eyebrow {
    margin-bottom: 10px;
    font-size: 9px;
    line-height: 1.35;
    letter-spacing: .16em;
  }

  .chapter h1,
  .chapter h2 {
    max-width: 100%;
    font-size: clamp(35px, 8.7vw, 62px);
    line-height: .96;
    letter-spacing: -.052em;
    text-wrap: balance;
  }

  .chapter-copy {
    display: none;
  }

  .chapter .primary-button,
  .chapter .text-link {
    margin-top: 18px;
  }

  .chapter .primary-button {
    width: 100%;
    min-height: 48px;
    gap: 18px;
  }

  .spec-row {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0;
    margin-top: 18px;
  }

  .spec-row div {
    min-width: 0;
    padding: 0 9px;
    border-right: 1px solid var(--line);
  }

  .spec-row div:first-child {
    padding-left: 0;
  }

  .spec-row div:last-child {
    padding-right: 0;
    border-right: 0;
  }

  .spec-row strong {
    font-size: clamp(24px, 7vw, 34px);
    white-space: nowrap;
  }

  .spec-row span {
    margin-top: 5px;
    font-size: 7px;
    line-height: 1.3;
    letter-spacing: .07em;
  }

  .story-progress {
    display: none;
  }

  .scroll-cue {
    display: none;
  }

  .trust-strip {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    min-height: 0;
    gap: 0;
    padding: 0 16px;
  }

  .trust-strip p {
    min-height: 78px;
    display: grid;
    place-items: center;
    margin: 0;
    padding: 14px 10px;
    text-align: center;
    font-size: 9px;
    line-height: 1.45;
    border-bottom: 1px solid rgba(255,255,255,.10);
  }

  .trust-strip p:nth-of-type(odd) {
    border-right: 1px solid rgba(255,255,255,.10);
  }

  .trust-strip span {
    display: none;
  }

  .section {
    padding: 76px 18px;
  }

  .section-heading,
  .tire-finder,
  .proof {
    grid-template-columns: minmax(0, 1fr);
  }

  .section-heading {
    gap: 16px;
    margin-bottom: 44px;
  }

  .section-heading .eyebrow {
    padding-top: 0;
  }

  .section-heading h2,
  .finder-copy h2 {
    font-size: clamp(39px, 10.5vw, 64px);
    line-height: .98;
    text-wrap: balance;
  }

  .service-card {
    min-height: 0;
    grid-template-columns: 34px minmax(0, 1fr);
    gap: 12px;
    padding: 26px 0;
  }

  .service-card:hover {
    padding-left: 0;
    padding-right: 0;
    background: transparent;
  }

  .service-card h3 {
    font-size: clamp(28px, 8vw, 40px);
  }

  .service-card p:last-child {
    font-size: 14px;
    line-height: 1.58;
  }

  .card-arrow {
    display: none;
  }

  .tire-finder {
    gap: 42px;
  }

  .finder-copy > p:last-child {
    font-size: 15px;
    line-height: 1.65;
  }

  .finder-form {
    grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr) auto minmax(0, 1fr);
    gap: 7px;
    padding: 22px 16px 18px;
    border-radius: 18px;
    box-shadow: 0 22px 48px rgba(17,18,15,.16);
  }

  .measure-group {
    min-width: 0;
    gap: 7px;
  }

  .measure-group label {
    font-size: 8px;
    letter-spacing: .10em;
  }

  .measure-group select {
    min-width: 0;
    padding: 8px 0 10px;
    font-size: clamp(28px, 8.5vw, 42px);
  }

  .measure-separator {
    display: block;
    padding-bottom: 12px;
    font-size: 20px;
  }

  .finder-form .measure-group:nth-of-type(3) {
    grid-column: auto;
    margin-top: 0;
  }

  .finder-form .measure-separator:nth-of-type(2) {
    display: block;
  }

  .finder-form button {
    justify-self: center;
    width: min(100%, 286px);
    min-height: 54px;
    margin-top: 18px;
  }

  /*
   * Los teléfonos no tienen hover fiable. La llanta queda
   * desplegada e integrada permanentemente en el botón.
   */
  .finder-form .button-wheel,
  .finder-form button:hover .button-wheel,
  .finder-form button:focus-visible .button-wheel {
    width: 40px;
    height: 40px;
    margin-left: 14px;
    opacity: 1;
    transform: translateX(0);
  }

  .finder-form button,
  .finder-form button:hover,
  .finder-form button:focus-visible {
    padding-right: 7px;
  }

  .finder-form .button-wheel .wheel-icon {
    animation: spinWheel 1.05s linear infinite;
  }

  .form-feedback {
    padding-inline: 8px;
    font-size: 11px;
    line-height: 1.45;
  }

  .proof {
    gap: 42px;
  }

  .proof-stat strong {
    font-size: clamp(88px, 28vw, 132px);
  }

  blockquote {
    font-size: clamp(29px, 8.3vw, 46px);
    line-height: 1.12;
  }

  blockquote cite {
    margin-top: 28px;
    font-size: 10px;
    line-height: 1.5;
  }

  .contact {
    --mobile-orbit-size: min(88vw, 520px);
    --mobile-orbit-radius: min(44vw, 260px);
    min-height: max(720px, 92svh);
    padding:
      88px
      18px
      calc(82px + var(--mobile-safe-bottom));
  }

  .contact .eyebrow,
  .contact h2,
  .contact > p:not(.eyebrow),
  .contact-actions,
  .contact small {
    position: relative;
    z-index: 2;
    width: 100%;
  }

  .contact::after {
    content: "";
    position: absolute;
    z-index: 1;
    top: 50%;
    left: 50%;
    width: min(94vw, 500px);
    height: 62%;
    transform: translate(-50%, -50%);
    pointer-events: none;
    background: radial-gradient(
      ellipse at center,
      rgba(244,244,239,.99) 0%,
      rgba(244,244,239,.97) 48%,
      rgba(244,244,239,.72) 68%,
      rgba(244,244,239,0) 100%
    );
  }

  .contact h2 {
    max-width: 660px;
    font-size: clamp(40px, 10.8vw, 62px);
    line-height: .98;
    text-wrap: balance;
  }

  .contact > p:not(.eyebrow) {
    max-width: 520px;
    margin: 24px auto;
    font-size: 15px;
    line-height: 1.62;
  }

  .contact-orbit {
    z-index: 0;
    top: 50%;
    left: 50%;
    width: var(--mobile-orbit-size);
    transform: translate(-50%, -50%);
  }

  .contact-orbit .orbit-wheel {
    top: 50%;
    left: -22px;
    width: 44px;
    height: 44px;
    transform-origin: calc(var(--mobile-orbit-radius) + 22px) 22px;
    animation-delay: -3.5s;
  }

  .contact-orbit .orbit-wheel .wheel-chip {
    width: 44px;
    height: 44px;
  }

  .contact-actions {
    flex-direction: column;
    align-items: stretch;
    gap: 10px;
    max-width: 340px;
  }

  .contact-actions .primary-button,
  .contact-actions .secondary-button {
    width: 100%;
    min-height: 52px;
  }

  .contact small {
    max-width: 360px;
    margin-top: 20px;
    font-size: 10px;
    line-height: 1.5;
  }

  footer {
    grid-template-columns: minmax(0, 1fr);
    gap: 18px;
    min-height: 0;
    padding:
      38px
      18px
      calc(38px + var(--mobile-safe-bottom));
    text-align: center;
  }

  footer > * {
    justify-self: center !important;
  }

  footer p {
    margin: 0;
  }
}

@media (max-width: 430px) {
  .site-header,
  .site-header.is-scrolled {
    padding-right: 12px;
    padding-left: 12px;
  }

  .header-cta {
    padding: 0 11px;
    font-size: 8px;
  }

  .chapter,
  .chapter-one,
  .chapter-two,
  .chapter-three {
    top: calc(var(--header-height) + 56.25vw + 18px);
    left: 10px;
    bottom: auto;
    width: calc(100% - 20px);
    padding: 16px;
    border-radius: 19px;
  }

  .chapter h1,
  .chapter h2 {
    font-size: clamp(33px, 9.2vw, 40px);
  }

  .chapter-two h2 {
    font-size: clamp(31px, 8.6vw, 38px);
  }

  .section {
    padding-right: 16px;
    padding-left: 16px;
  }

  .finder-form {
    padding-right: 13px;
    padding-left: 13px;
  }

  .measure-group select {
    font-size: clamp(26px, 8vw, 34px);
  }

  .contact {
    --mobile-orbit-size: 90vw;
    --mobile-orbit-radius: 45vw;
  }
}

/* Teléfonos en horizontal: video a la derecha y contenido a la izquierda. */
@media (max-width: 900px) and (orientation: landscape) and (max-height: 620px) {
  :root {
    --header-height: calc(58px + var(--mobile-safe-top));
  }

  .site-header,
  .site-header.is-scrolled {
    height: var(--header-height);
  }

  .scroll-story {
    height: 300svh;
  }

  .tire-canvas,
  .tire-poster {
    top: calc(var(--header-height) + 6px);
    left: 44vw;
    width: 56vw;
    height: 31.5vw;
  }

  .video-wash {
    display: none;
  }

  .sequence-loader {
    top: auto;
    right: 8vw;
    bottom: 22px;
    left: auto;
    transform: none;
  }

  .chapter,
  .chapter-one,
  .chapter-two,
  .chapter-three {
    top: auto;
    right: auto;
    bottom: calc(14px + var(--mobile-safe-bottom));
    left: 14px;
    width: calc(44vw - 24px);
    max-height: calc(100svh - var(--header-height) - 26px);
    padding: 15px;
  }

  .chapter h1,
  .chapter h2,
  .chapter-two h2 {
    font-size: clamp(27px, 4.3vw, 39px);
  }

  .chapter .eyebrow {
    margin-bottom: 7px;
    font-size: 7px;
  }

  .chapter .primary-button {
    min-height: 42px;
    margin-top: 12px;
  }

  .spec-row {
    margin-top: 12px;
  }

  .spec-row strong {
    font-size: 20px;
  }

  .spec-row span {
    font-size: 6px;
  }
}

@media (hover: none) and (pointer: coarse) and (max-width: 900px) {
  .header-cta:active,
  .primary-button:active,
  .secondary-button:active,
  .finder-form button:active {
    transform: scale(.98);
  }
}

/*
 * Hero vertical: canvas y copy forman una sola escena. El encuadre se dibuja
 * desde JavaScript para conservar el recorrido completo de la llanta sin el
 * recorte agresivo que produciría `cover` en una pantalla alta.
 */
@media (max-width: 900px) and (orientation: portrait) {
  :root {
    --header-height: calc(58px + var(--mobile-safe-top));
  }

  .site-header,
  .site-header.is-scrolled {
    height: var(--header-height);
    padding: var(--mobile-safe-top) 12px 0;
    background: rgba(247,247,244,.88);
    border-color: rgba(17,18,15,.09);
  }

  .scroll-story {
    height: 285svh;
  }

  .story-viewport {
    height: 100svh;
    min-height: 0;
    background: #f7f7f4;
  }

  .tire-canvas,
  .tire-poster {
    inset: var(--header-height) 0 0;
    width: 100vw;
    height: calc(100svh - var(--header-height));
    object-fit: contain;
    object-position: center top;
  }

  .video-wash {
    inset: var(--header-height) 0 0;
    height: auto;
    background:
      linear-gradient(180deg,
        rgba(247,247,244,.02) 0%,
        rgba(247,247,244,0) 36%,
        rgba(247,247,244,.50) 58%,
        rgba(247,247,244,.96) 76%,
        #f7f7f4 100%),
      linear-gradient(90deg,
        rgba(247,247,244,.10),
        transparent 24%,
        transparent 76%,
        rgba(247,247,244,.10));
  }

  .sequence-loader {
    top: 48%;
    bottom: auto;
  }

  .chapter,
  .chapter-one,
  .chapter-two,
  .chapter-three {
    top: auto;
    right: clamp(18px, 5vw, 34px);
    bottom: calc(clamp(28px, 5.5svh, 58px) + var(--mobile-safe-bottom));
    left: clamp(18px, 5vw, 34px);
    width: auto;
    max-height: none;
    padding: 0;
    overflow: visible;
    border: 0;
    border-radius: 0;
    color: var(--ink);
    background: transparent;
    box-shadow: none;
    text-shadow: none;
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
    visibility: hidden;
    transform: translateY(22px);
    transition:
      opacity .18s ease,
      transform .24s ease,
      visibility 0s linear .18s;
  }

  .chapter.is-active {
    visibility: visible;
    transform: translateY(0);
    transition:
      opacity .26s ease .07s,
      transform .32s cubic-bezier(.2,.8,.2,1) .07s,
      visibility 0s;
  }

  .chapter::before {
    display: block;
    inset: -28px -24px -22px;
    background: radial-gradient(
      ellipse at 38% 55%,
      rgba(247,247,244,.98) 0%,
      rgba(247,247,244,.89) 54%,
      rgba(247,247,244,.24) 82%,
      rgba(247,247,244,0) 100%);
    filter: blur(10px);
  }

  .chapter .eyebrow {
    margin-bottom: 12px;
    font-size: 9px;
    line-height: 1.35;
  }

  .chapter h1,
  .chapter h2 {
    max-width: 690px;
    font-size: clamp(38px, 11.2vw, 68px);
    line-height: .92;
    letter-spacing: -.058em;
    text-wrap: balance;
  }

  .chapter-copy {
    display: none;
  }

  .chapter .primary-button {
    width: auto;
    min-height: 48px;
    margin-top: 20px;
    padding: 0 20px;
    gap: 28px;
  }

  .chapter .text-link {
    margin-top: 22px;
  }

  .spec-row {
    max-width: 560px;
    margin-top: 21px;
  }

  .header-cta,
  .site-header.is-scrolled .header-cta {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex: 0 0 auto;
    gap: 8px;
    width: auto;
    min-width: 0;
    height: 38px;
    min-height: 38px;
    padding: 3px 3px 3px 13px;
    border: 0;
    border-radius: 999px;
    color: var(--paper);
    background: var(--ink);
    font-size: 9px;
    line-height: 1;
    letter-spacing: .10em;
    box-shadow: 0 7px 18px rgba(17,18,15,.13);
  }

  .header-cta > span {
    display: inline-flex;
    align-items: center;
    height: auto;
    line-height: 1;
  }

  .header-cta:hover {
    color: var(--paper);
    background: var(--ink);
  }

  .header-cta .cta-now {
    display: none;
  }

  .header-cta .cta-arrow {
    display: grid;
    place-items: center;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    color: var(--ink);
    background: var(--acid);
    font-size: 13px;
    line-height: 1;
  }
}

@media (max-width: 360px) and (orientation: portrait) {
  .site-header,
  .site-header.is-scrolled {
    padding-right: 9px;
    padding-left: 9px;
  }

  .brand {
    gap: 7px;
    font-size: 11px;
  }

  .brand-mark {
    width: 20px;
    height: 20px;
  }

  .chapter,
  .chapter-one,
  .chapter-two,
  .chapter-three {
    right: 16px;
    bottom: calc(22px + var(--mobile-safe-bottom));
    left: 16px;
  }

  .chapter h1,
  .chapter h2 {
    font-size: clamp(34px, 10.8vw, 40px);
  }

  .chapter .primary-button {
    width: 100%;
    min-height: 46px;
    margin-top: 16px;
  }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .001ms !important; animation-iteration-count: 1 !important; transition-duration: .001ms !important; }
}