/* ============================================
   BHG Autopartes — Landing page
   Sistema de diseño: cromo/grafito + acento "spark"
   ============================================ */

:root {
  --graphite: #14161A;
  --steel: #4B4F58;
  --chrome: #C9CCD1;
  --bone: #F6F5F3;
  --spark: #FF5A1F;
  --ember: #FFB020;

  --font-display: "Big Shoulders Display", sans-serif;
  --font-body: "IBM Plex Sans", system-ui, sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, monospace;

  --container-w: 1160px;
  --radius: 4px;

  --header-h: 76px;
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-h);
}
body {
  margin: 0;
  background: var(--bone);
  color: var(--graphite);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
ul, ol, dl, dd { margin: 0; padding: 0; list-style: none; }
h1, h2, h3, p { margin: 0; }
a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; border: none; background: none; color: inherit; }
input { font: inherit; }

.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;
}

.skip-link {
  position: absolute;
  top: -100px;
  left: 1rem;
  background: var(--spark);
  color: var(--graphite);
  padding: 0.75rem 1.25rem;
  font-weight: 600;
  border-radius: var(--radius);
  z-index: 200;
  transition: top 0.15s ease;
}
.skip-link:focus { top: 1rem; }

/* Focus visibility — kept consistent (graphite ring + spark glow) for AA-safe contrast on any background */
:focus-visible {
  outline: 3px solid var(--graphite);
  outline-offset: 3px;
  box-shadow: 0 0 0 6px rgba(255, 90, 31, 0.35);
  border-radius: 2px;
}
.site-header :focus-visible,
.site-footer :focus-visible {
  outline: 3px solid var(--chrome);
  box-shadow: 0 0 0 6px rgba(255, 90, 31, 0.45);
}

.container {
  max-width: var(--container-w);
  margin-inline: auto;
  padding-inline: 1.25rem;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.85rem 1.5rem;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.95rem;
  border-radius: var(--radius);
  white-space: nowrap;
  transition: transform 0.15s ease, background 0.15s ease, color 0.15s ease;
}

.btn--cta {
  background: var(--spark);
  color: var(--graphite);
}
.btn--cta:hover { background: var(--ember); }
.btn--cta:active { transform: translateY(1px); }

.btn--outline {
  background: transparent;
  color: var(--graphite);
  border: 1.5px solid var(--steel);
}
.btn--outline:hover {
  border-color: var(--spark);
  color: var(--spark);
}

.btn--lg {
  padding: 1.1rem 2rem;
  font-size: 1.05rem;
  width: 100%;
}
@media (min-width: 560px) {
  .btn--lg { width: auto; }
}

.btn-arrow { transition: transform 0.15s ease; }
.btn:hover .btn-arrow { transform: translateX(3px); }

/* Bearing spin — used on the primary quote button while "sending" */
.bearing-spin {
  display: none;
  width: 1.1em;
  height: 1.1em;
  border-radius: 50%;
  border: 2px solid rgba(20,22,26,0.25);
  border-top-color: var(--graphite);
}
.btn--lg.is-loading .bearing-spin {
  display: inline-block;
  animation: bearing-rotate 0.6s linear infinite;
}
.btn--lg.is-loading .btn-label,
.btn--lg.is-loading .btn-arrow { opacity: 0.6; }

@keyframes bearing-rotate {
  to { transform: rotate(360deg); }
}

/* ---------- Header ---------- */
.site-header {
  position: fixed;
  inset-inline: 0;
  top: 0;
  z-index: 100;
  height: var(--header-h);
  display: flex;
  align-items: center;
  background: transparent;
  transition: background 0.25s ease, box-shadow 0.25s ease;
}
.site-header.is-scrolled {
  background: var(--bone);
  box-shadow: 0 1px 0 var(--chrome);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.logo-link {
  display: inline-flex;
  align-items: center;
  background: var(--bone);
  border-radius: var(--radius);
  padding: 0.35rem 0.6rem;
}
.logo-img { height: 40px; width: auto; }

.header-cta {
  padding: 0.6rem 1.1rem;
  font-size: 0.85rem;
}
@media (min-width: 560px) {
  .logo-img { height: 48px; }
  .header-cta { padding: 0.75rem 1.4rem; font-size: 0.95rem; }
}

/* ---------- Hero ---------- */
.hero {
  padding-top: calc(var(--header-h) + 3rem);
  padding-bottom: 3.5rem;
  background:
    radial-gradient(circle at 85% 10%, rgba(255,90,31,0.10), transparent 45%),
    var(--graphite);
  color: var(--bone);
}

.hero-inner { max-width: 720px; }

.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--chrome);
  margin-bottom: 1rem;
}

.hero-title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2.75rem, 9vw, 5rem);
  line-height: 0.95;
  letter-spacing: -0.01em;
  text-transform: uppercase;
  margin-bottom: 2rem;
  color: #fff;
}

.quote-form {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
  margin-bottom: 1.25rem;
}
@media (min-width: 560px) {
  .quote-form { flex-direction: row; }
}

.quote-field {
  position: relative;
  flex: 1;
  display: flex;
  align-items: center;
  background: var(--bone);
  border-radius: var(--radius);
  border: 2px solid var(--steel);
  overflow: hidden;
}
.quote-field:focus-within {
  border-color: var(--spark);
}
.quote-field__tick {
  flex: none;
  width: 10px;
  align-self: stretch;
  background-image: repeating-linear-gradient(
    to bottom,
    var(--steel) 0,
    var(--steel) 2px,
    transparent 2px,
    transparent 7px
  );
  opacity: 0.6;
}
.quote-input {
  flex: 1;
  min-width: 0;
  border: none;
  background: transparent;
  padding: 1.1rem 1rem;
  font-family: var(--font-mono);
  font-size: 1.1rem;
  color: var(--graphite);
}
.quote-input::placeholder { color: var(--steel); opacity: 0.8; }
.quote-input:focus { outline: none; }

.hero-support {
  font-size: 0.9rem;
  color: var(--chrome);
}

/* ---------- Bearing divider (signature element, used sparingly) ---------- */
.bearing-divider {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: clamp(10px, 3vw, 22px);
  padding: 2.25rem 1rem;
  background: var(--graphite);
}
.bearing-divider span {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--steel);
  flex: none;
}
.bearing-divider span:nth-child(6n+1) { background: var(--spark); }

/* ---------- Brands strip ---------- */
.brands {
  background: var(--graphite);
  padding-bottom: 3.5rem;
}
.brands-list {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 2rem 2.5rem;
}
.brand-chip {
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bone);
  border-radius: var(--radius);
  padding: 0.75rem;
  width: 140px;
  height: 64px;
}
.brand-logo {
  width: 100%;
  height: 100%;
  object-fit: contain;
  filter: grayscale(1) contrast(1.6) brightness(0.7);
  transition: filter 0.2s ease, transform 0.2s ease;
}
.brand-chip:hover .brand-logo {
  filter: grayscale(0);
  transform: scale(1.04);
}
.brands-list__more {
  font-family: var(--font-body);
  font-weight: 500;
  font-size: 0.85rem;
  color: var(--steel);
}

/* ---------- Section titles ---------- */
.section-title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.9rem, 4.5vw, 2.6rem);
  text-transform: uppercase;
  letter-spacing: -0.01em;
  margin-bottom: 1.75rem;
  color: var(--graphite);
}

/* ---------- Pillars ---------- */
.pillars { padding-block: 4rem; }
.pillars-grid {
  display: grid;
  gap: 1.5rem;
  grid-template-columns: 1fr;
}
@media (min-width: 720px) {
  .pillars-grid { grid-template-columns: repeat(3, 1fr); }
}
.pillar-card {
  background: #fff;
  border: 1px solid var(--chrome);
  border-radius: var(--radius);
  padding: 1.75rem;
  transition: transform 0.2s ease, border-color 0.2s ease;
}
.pillar-card:hover {
  transform: rotate(-2deg);
  border-color: var(--spark);
}
.pillar-icon {
  width: 40px;
  height: 40px;
  color: var(--steel);
  margin-bottom: 1rem;
}
.pillar-card h3 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}
.pillar-card p {
  color: var(--steel);
  font-size: 0.92rem;
}

/* ---------- Segments (a quién atendemos) ---------- */
.segments {
  padding-block: 4rem;
  background: #fff;
}
.segments-grid {
  display: grid;
  gap: 1.25rem;
  grid-template-columns: 1fr;
}
@media (min-width: 640px) {
  .segments-grid { grid-template-columns: repeat(2, 1fr); }
}
.segment-card {
  border: 1px solid var(--chrome);
  border-left: 4px solid var(--graphite);
  padding: 1.5rem;
  background: var(--bone);
  transition: transform 0.2s ease, border-left-color 0.2s ease;
}
.segment-card:hover {
  transform: rotate(1.5deg);
  border-left-color: var(--spark);
}
.segment-card__tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--spark);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 0.6rem;
}
.segment-card h3 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}
.segment-card p {
  color: var(--steel);
  font-size: 0.92rem;
}

/* ---------- Process ---------- */
.process { padding-block: 4rem; background: #fff; }
.process-list {
  display: grid;
  gap: 1.5rem;
  grid-template-columns: 1fr;
}
@media (min-width: 640px) {
  .process-list { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 980px) {
  .process-list { grid-template-columns: repeat(4, 1fr); }
}
.process-step {
  border-top: 3px solid var(--graphite);
  padding-top: 1rem;
}
.process-step__num {
  display: block;
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: 0.9rem;
  color: var(--spark);
  margin-bottom: 0.5rem;
}
.process-step p {
  font-size: 0.98rem;
  color: var(--graphite);
}

/* ---------- Final CTA ---------- */
.final-cta {
  padding-block: 4rem;
  background: var(--bone);
  border-top: 1px solid var(--chrome);
}
.final-cta-inner {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 1.5rem;
}
@media (min-width: 720px) {
  .final-cta-inner {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }
}
.final-cta h2 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.6rem, 3.5vw, 2.1rem);
  text-transform: uppercase;
  max-width: 26ch;
}

/* ---------- Footer ---------- */
.site-footer {
  background: var(--graphite);
  color: var(--chrome);
  padding-block: 3rem;
}
.footer-inner {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}
.footer-logo-chip {
  display: inline-flex;
  align-self: flex-start;
  background: var(--bone);
  border-radius: var(--radius);
  padding: 0.5rem 0.75rem;
}
.footer-logo {
  height: 34px;
  width: auto;
}
.footer-details {
  display: grid;
  gap: 1.25rem;
  grid-template-columns: 1fr;
}
@media (min-width: 640px) {
  .footer-details { grid-template-columns: repeat(3, 1fr); }
}
.footer-details dt {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--steel);
  margin-bottom: 0.3rem;
}
.footer-details dd {
  font-size: 0.95rem;
}
.footer-details a:hover { color: var(--spark); }

.footer-copy {
  font-size: 0.8rem;
  color: var(--steel);
  border-top: 1px solid #2a2d33;
  padding-top: 1.5rem;
}
.footer-copy a { color: var(--steel); text-decoration: underline; }
.footer-copy a:hover { color: var(--spark); }

.ratio-1-1 { aspect-ratio: 1 / 1; }
.ratio-4-3 { aspect-ratio: 4 / 3; }

/* ---------- Categorías de producto ---------- */
.categories { padding-block: 4rem; background: var(--bone); }
.categories-lead {
  color: var(--steel);
  max-width: 60ch;
  margin-bottom: 2rem;
}
.categories-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1.5rem;
}
.category-card {
  width: 100%;
  max-width: 220px;
  margin: 0;
}
.category-photo {
  overflow: hidden;
  border-radius: var(--radius);
  background: #fff;
  border: 1px solid var(--chrome);
  padding: 0.75rem;
  transition: border-color 0.2s ease;
}
.category-card:hover .category-photo {
  border-color: var(--spark);
}
.category-photo img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
}
.category-card__tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--spark);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-top: 0.85rem;
}
.category-card h3 {
  margin-top: 0.25rem;
  font-size: 1.05rem;
  font-weight: 600;
}

/* ---------- Garantía de autenticidad ---------- */
.authenticity { padding-block: 4rem; background: #fff; }
.authenticity-grid {
  display: grid;
  gap: 2rem;
  grid-template-columns: 1fr;
  align-items: center;
}
@media (min-width: 780px) {
  .authenticity-grid { grid-template-columns: 1.1fr 0.9fr; }
}
.authenticity-copy p {
  color: var(--steel);
  font-size: 1rem;
  max-width: 58ch;
  margin-top: 1rem;
}
.authenticity-copy p + p { margin-top: 0.75rem; }
.authenticity-photo {
  overflow: hidden;
  border-radius: var(--radius);
}
.authenticity-photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

/* ---------- Entregas reales ---------- */
.deliveries {
  padding-block: 4rem;
  background: var(--graphite);
}
.deliveries .section-title { color: #fff; }
.deliveries-lead {
  color: var(--chrome);
  max-width: 60ch;
  margin-bottom: 2rem;
}
.deliveries-grid {
  display: grid;
  gap: 1.25rem;
  grid-template-columns: 1fr;
}
@media (min-width: 700px) {
  .deliveries-grid { grid-template-columns: repeat(3, 1fr); }
}
.delivery-photo {
  aspect-ratio: 4 / 3;
  overflow: hidden;
  border-radius: var(--radius);
}
.delivery-photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.3s ease;
}
.delivery-photo:hover img {
  transform: scale(1.04);
}

/* ---------- FAQ ---------- */
.faq { padding-block: 4rem; background: #fff; }
.faq-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  max-width: 780px;
}
.faq-item {
  border: 1px solid var(--chrome);
  border-radius: var(--radius);
  background: var(--bone);
}
.faq-item summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.1rem 1.25rem;
  cursor: pointer;
  font-weight: 600;
  list-style: none;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::marker { content: ""; }
.faq-item summary:hover { color: var(--spark); }
.faq-icon {
  flex: none;
  font-family: var(--font-mono);
  font-size: 1.2rem;
  color: var(--spark);
  transition: transform 0.2s ease;
}
.faq-item[open] .faq-icon { transform: rotate(45deg); }
.faq-item p {
  padding: 0 1.25rem 1.25rem;
  margin: 0;
  color: var(--steel);
  font-size: 0.95rem;
}

/* ---------- Floating WhatsApp button (sitewide) ---------- */
.whatsapp-float {
  position: fixed;
  right: 1.25rem;
  bottom: calc(1.25rem + env(safe-area-inset-bottom, 0px));
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--spark);
  color: var(--graphite);
  border-radius: 50%;
  box-shadow: 0 6px 18px rgba(20, 22, 26, 0.35);
  z-index: 90;
  transition: transform 0.15s ease, background 0.15s ease;
}
.whatsapp-float:hover {
  background: var(--ember);
  transform: scale(1.06);
}
.whatsapp-float svg { width: 26px; height: 26px; }

/* ---------- Legal page (aviso de privacidad) ---------- */
.legal-page {
  padding-top: calc(var(--header-h) + 3rem);
  padding-bottom: 4rem;
  background: var(--bone);
  min-height: 60vh;
}
.legal-page .container { max-width: 760px; }
.legal-page h1 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2rem, 5vw, 2.75rem);
  text-transform: uppercase;
  margin-bottom: 1.5rem;
}
.legal-page h2 {
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 1.15rem;
  margin-top: 2rem;
  margin-bottom: 0.5rem;
}
.legal-page p {
  color: var(--steel);
  margin: 0 0 1rem;
}
.legal-page .back-link {
  display: inline-block;
  margin-top: 2rem;
  font-weight: 600;
  color: var(--graphite);
}
.legal-page .back-link:hover { color: var(--spark); }