/* =========================================================
   AUTORELIEVE — Hoja de estilos principal
   Estética: Corporate Professional (azul marino / grafito / dorado)
   ========================================================= */

/* ---------- 1. VARIABLES ---------- */
:root {
  --color-navy: #0F2A4A;
  --color-navy-light: #163A63;
  --color-graphite: #2E3A45;
  --color-gold: #C8A24B;
  --color-gold-dark: #B08F3C;
  --color-line: #D9DEE4;
  --color-bg: #FFFFFF;
  --color-bg-alt: #F5F7F9;
  --color-text: #1B2733;
  --color-text-muted: #5C6773;
  --color-success: #1E7A46;
  --color-success-bg: #E9F5EE;
  --color-error: #B3261E;
  --color-error-bg: #FBEAE9;

  --font-heading: 'Libre Franklin', 'Segoe UI', sans-serif;
  --font-body: 'Source Sans 3', 'Segoe UI', sans-serif;
  --font-mono: 'IBM Plex Mono', monospace;

  --radius: 4px;
  --shadow-card: 0 2px 8px rgba(15, 42, 74, 0.06);
  --shadow-card-hover: 0 6px 20px rgba(15, 42, 74, 0.12);
  --transition: 220ms ease;
  --container-width: 1200px;
}

/* ---------- 2. RESET ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body, h1, h2, h3, h4, p, ul, ol, figure { margin: 0; }
ul, ol { padding: 0; list-style: none; }
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; border: none; background: none; }
input, select, textarea { font: inherit; color: inherit; }
table { border-collapse: collapse; width: 100%; }

body {
  font-family: var(--font-body);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.65;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

/* ---------- 3. TYPOGRAPHY ---------- */
h1, h2, h3, h4 {
  font-family: var(--font-heading);
  color: var(--color-navy);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.01em;
}
h1 { font-size: 46px; }
h2 { font-size: 34px; }
h3 { font-size: 21px; }
p { color: var(--color-text-muted); }

.eyebrow {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-gold-dark);
  margin-bottom: 10px;
  display: block;
}

.section-heading { max-width: 640px; margin: 0 0 48px; }
.section-heading h2 { margin-top: 4px; }

/* ---------- 4. LAYOUT HELPERS ---------- */
.container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px;
}

main > section { padding: 88px 0; }
main > section + section { border-top: 1px solid var(--color-line); }

.reveal { opacity: 0; transform: translateY(16px); transition: opacity 600ms ease, transform 600ms ease; }
.reveal.is-visible { opacity: 1; transform: translateY(0); }

/* ---------- 5. BUTTONS ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 28px;
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 15px;
  border-radius: var(--radius);
  transition: background var(--transition), color var(--transition), border-color var(--transition), transform var(--transition);
  white-space: nowrap;
}
.btn--primary { background: var(--color-navy); color: #fff; }
.btn--primary:hover { background: var(--color-navy-light); }
.btn--gold { background: var(--color-gold); color: var(--color-navy); }
.btn--gold:hover { background: var(--color-gold-dark); }
.btn--outline { background: transparent; color: var(--color-navy); border: 1px solid var(--color-line); }
.btn--outline:hover { border-color: var(--color-navy); background: var(--color-bg-alt); }
.btn--small { padding: 9px 16px; font-size: 13px; }
.btn--full { width: 100%; }
.btn--nav { margin-left: 24px; }
.btn:active { transform: translateY(1px); }

/* ---------- 6. TOPBAR ---------- */
.topbar { background: var(--color-navy); color: #fff; font-size: 13px; }
.topbar__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 9px 24px;
  flex-wrap: wrap;
}
.topbar__text { display: flex; gap: 10px; flex-wrap: wrap; color: rgba(255,255,255,0.88); }
.topbar__sep { opacity: 0.4; }
.topbar__contact { display: flex; align-items: center; gap: 10px; white-space: nowrap; }
.topbar__contact a { font-weight: 600; color: #fff; }
.topbar__hours { color: rgba(255,255,255,0.7); font-family: var(--font-mono); font-size: 12px; }

/* ---------- 7. HEADER / NAV ---------- */
.site-header {
  background: #fff;
  border-bottom: 1px solid var(--color-line);
  position: sticky;
  top: 0;
  z-index: 100;
  transition: box-shadow var(--transition);
}
.site-header.is-scrolled { box-shadow: 0 4px 16px rgba(15,42,74,0.08); }
.site-header__inner {
  display: flex;
  align-items: center;
  padding: 16px 24px;
  gap: 32px;
}

.brand { display: flex; align-items: center; gap: 10px; }
.brand__mark {
  width: 38px; height: 38px;
  background: var(--color-navy);
  color: var(--color-gold);
  font-family: var(--font-heading);
  font-weight: 800;
  display: flex; align-items: center; justify-content: center;
  border-radius: var(--radius);
  font-size: 19px;
}
.brand__name {
  font-family: var(--font-heading);
  font-weight: 500;
  font-size: 18px;
  letter-spacing: 0.02em;
  color: var(--color-navy);
}
.brand__name strong { font-weight: 800; }

.main-nav { flex: 1; }
.main-nav ul { display: flex; gap: 30px; }
.main-nav a {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 15px;
  color: var(--color-graphite);
  padding: 8px 0;
  border-bottom: 2px solid transparent;
  transition: color var(--transition), border-color var(--transition);
}
.main-nav a:hover { color: var(--color-navy); }
.main-nav a.is-active { color: var(--color-navy); border-bottom-color: var(--color-gold); }

.hamburger { display: none; flex-direction: column; gap: 5px; padding: 8px; }
.hamburger span { width: 24px; height: 2px; background: var(--color-navy); transition: transform var(--transition), opacity var(--transition); }
.hamburger.is-open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.is-open span:nth-child(2) { opacity: 0; }
.hamburger.is-open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- 8. HERO ---------- */
.hero { padding: 72px 0 96px; background: var(--color-bg-alt); border-top: none; }
.hero__grid { display: grid; grid-template-columns: 1.05fr 0.95fr; gap: 56px; align-items: start; }
.hero__lead { font-size: 18px; margin: 20px 0 28px; max-width: 46ch; }
.hero__points { display: flex; flex-direction: column; gap: 12px; margin-bottom: 32px; }
.hero__points li { display: flex; align-items: center; gap: 10px; font-weight: 600; color: var(--color-graphite); }
.hero__points i { color: var(--color-gold-dark); font-size: 18px; }
.hero h1 { font-size: 44px; }

/* ---------- 9. FORMS / LEAD FORM ---------- */
.lead-form {
  background: #fff;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-card);
  padding: 36px;
}
.lead-form__title { margin-bottom: 8px; font-size: 22px; }
.lead-form__subtitle { margin-bottom: 24px; font-size: 14px; }

.form__row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-bottom: 16px; }
.form__row--vehicle { grid-template-columns: 1fr 1fr 1fr; }
.form__field { display: flex; flex-direction: column; gap: 6px; margin-bottom: 16px; }
.form__row .form__field { margin-bottom: 0; }
.form__field label { font-size: 13px; font-weight: 600; color: var(--color-graphite); }
.form__field input, .form__field select, .form__field textarea {
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 11px 12px;
  font-size: 15px;
  background: #fff;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.form__field input:focus, .form__field select:focus, .form__field textarea:focus {
  outline: none;
  border-color: var(--color-navy);
  box-shadow: 0 0 0 3px rgba(15,42,74,0.1);
}
.form__field input.is-invalid, .form__field select.is-invalid { border-color: var(--color-error); }
.form__field textarea { resize: vertical; min-height: 96px; }

.form__field--checkbox { flex-direction: row; align-items: flex-start; gap: 10px; margin: 20px 0; }
.form__field--checkbox input { margin-top: 3px; width: 16px; height: 16px; }
.form__field--checkbox label { font-weight: 400; font-size: 13px; color: var(--color-text-muted); }
.form__field--checkbox a { color: var(--color-navy); font-weight: 600; text-decoration: underline; }

.form__honeypot { position: absolute; left: -9999px; top: -9999px; }

.form-alert {
  display: flex; align-items: center; gap: 10px;
  padding: 12px 16px; border-radius: var(--radius);
  font-size: 14px; font-weight: 600; margin-bottom: 20px;
}
.form-alert--success { background: var(--color-success-bg); color: var(--color-success); }
.form-alert--error { background: var(--color-error-bg); color: var(--color-error); }

/* ---------- 10. TRUST STRIP ---------- */
.trust-strip__grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 32px; }
.trust-item { text-align: left; }
.trust-item i { font-size: 30px; color: var(--color-gold-dark); margin-bottom: 14px; display: block; }
.trust-item h3 { font-size: 17px; margin-bottom: 8px; }
.trust-item p { font-size: 14px; }

/* ---------- 11. CATEGORIES ---------- */
.categories { background: var(--color-bg-alt); }
.categories__grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.category-card {
  background: #fff; border: 1px solid var(--color-line); border-radius: var(--radius);
  overflow: hidden; box-shadow: var(--shadow-card); transition: box-shadow var(--transition), border-color var(--transition);
}
.category-card:hover { box-shadow: var(--shadow-card-hover); border-color: var(--color-navy); }
.category-card img { height: 170px; width: 100%; object-fit: cover; }
.category-card__body { padding: 20px; }
.category-card__body h3 { font-size: 17px; margin-bottom: 8px; }
.category-card__body p { font-size: 14px; margin-bottom: 14px; }
.category-card__body a { font-weight: 700; font-size: 14px; color: var(--color-navy); display: inline-flex; align-items: center; gap: 6px; }
.category-card__body a:hover { color: var(--color-gold-dark); }

/* ---------- 12. VEHICLE FINDER ---------- */
.vehicle-finder__grid { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: center; }
.vehicle-finder__figure img { border-radius: var(--radius); box-shadow: var(--shadow-card); }
.step-list { display: flex; flex-direction: column; gap: 14px; margin: 24px 0 28px; }
.step-list li { display: flex; align-items: center; gap: 14px; font-weight: 600; color: var(--color-graphite); }
.step-list span {
  font-family: var(--font-mono); font-weight: 500; font-size: 13px;
  width: 32px; height: 32px; border-radius: 50%; background: var(--color-navy); color: #fff;
  display: flex; align-items: center; justify-content: center; flex-shrink: 0;
}

/* ---------- 13. WHY US ---------- */
.why-us__grid { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: center; }
.why-us__figure img { border-radius: var(--radius); box-shadow: var(--shadow-card); }
.check-list { display: flex; flex-direction: column; gap: 12px; margin: 22px 0 28px; }
.check-list li { display: flex; align-items: flex-start; gap: 10px; color: var(--color-graphite); font-weight: 600; }
.check-list i { color: var(--color-success); margin-top: 3px; }

/* ---------- 14. PRODUCT CARDS / GRIDS ---------- */
.products-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.product-card {
  background: #fff; border: 1px solid var(--color-line); border-radius: var(--radius);
  overflow: hidden; box-shadow: var(--shadow-card); transition: box-shadow var(--transition), border-color var(--transition);
  scroll-margin-top: 120px;
}
.product-card:hover { box-shadow: var(--shadow-card-hover); border-color: var(--color-navy); }
.product-card img { height: 190px; width: 100%; object-fit: cover; }
.product-card__body { padding: 22px; }
.product-card__sku { font-family: var(--font-mono); font-size: 12px; color: var(--color-text-muted); margin-bottom: 6px; }
.product-card__body h3 { font-size: 18px; margin-bottom: 8px; }
.product-card__body p { font-size: 14px; margin-bottom: 10px; }
.product-card__compat { display: flex; align-items: center; gap: 6px; font-size: 13px; color: var(--color-success); font-weight: 600; margin-bottom: 16px; }
.product-card__footer { display: flex; align-items: center; justify-content: space-between; border-top: 1px solid var(--color-line); padding-top: 16px; }
.product-card__price { font-family: var(--font-mono); font-weight: 600; color: var(--color-navy); font-size: 15px; }

/* ---------- 15. TESTIMONIALS ---------- */
.testimonials__grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.testimonial-card {
  background: var(--color-bg-alt); border: 1px solid var(--color-line); border-radius: var(--radius);
  padding: 28px; border-top: 3px solid var(--color-gold);
}
.testimonial-card__quote { color: var(--color-text); font-size: 15px; margin-bottom: 18px; font-style: italic; }
.testimonial-card__author { font-family: var(--font-heading); font-weight: 700; color: var(--color-navy); font-size: 15px; }
.testimonial-card__role { font-size: 13px; margin-top: 2px; }

/* ---------- 16. PRE-FOOTER CTA ---------- */
.pre-footer-cta { background: var(--color-navy); }
.pre-footer-cta__inner {
  display: flex; align-items: center; justify-content: space-between; gap: 24px;
  padding: 56px 24px; flex-wrap: wrap;
}
.pre-footer-cta h2 { color: #fff; font-size: 28px; margin-bottom: 8px; }
.pre-footer-cta p { color: rgba(255,255,255,0.75); }

/* ---------- 17. FOOTER ---------- */
.site-footer { background: var(--color-graphite); color: rgba(255,255,255,0.75); }
.site-footer__grid {
  display: grid; grid-template-columns: 1.4fr 1fr 1fr 1.2fr 1fr; gap: 32px;
  padding: 64px 24px 40px;
}
.footer-col h3 { color: #fff; font-size: 14px; letter-spacing: 0.04em; text-transform: uppercase; margin-bottom: 18px; }
.footer-col ul { display: flex; flex-direction: column; gap: 10px; }
.footer-col a { font-size: 14px; color: rgba(255,255,255,0.75); transition: color var(--transition); }
.footer-col a:hover { color: var(--color-gold); }
.footer-col--brand p { font-size: 14px; margin-top: 14px; }
.brand--footer .brand__name { color: #fff; }
.footer-legal-name { font-family: var(--font-mono); font-size: 12px; margin-top: 12px; color: rgba(255,255,255,0.5); }
.footer-contact li { display: flex; align-items: flex-start; gap: 8px; font-size: 14px; }
.footer-contact i { margin-top: 3px; color: var(--color-gold); }

.site-footer__bottom { border-top: 1px solid rgba(255,255,255,0.12); }
.site-footer__bottom .container { padding: 20px 24px; }
.site-footer__bottom p { font-size: 13px; color: rgba(255,255,255,0.5); }

/* ---------- 18. PAGE HEADER (inner pages) ---------- */
.page-header { background: var(--color-bg-alt); padding: 64px 0; border-top: none; }
.page-header h1 { margin: 8px 0 14px; }
.page-header p { max-width: 60ch; font-size: 16px; }
.page-header--dark { background: var(--color-navy); }
.page-header--dark h1 { color: #fff; }
.page-header--dark p { color: rgba(255,255,255,0.75); }
.breadcrumb { font-family: var(--font-mono); font-size: 13px; color: var(--color-text-muted); margin-bottom: 4px; }
.breadcrumb a { color: var(--color-navy); font-weight: 600; }
.breadcrumb--light { color: rgba(255,255,255,0.6); }
.breadcrumb--light a { color: var(--color-gold); }

/* ---------- 19. CATALOG / FILTERS ---------- */
.catalog__grid { display: grid; grid-template-columns: 260px 1fr; gap: 40px; align-items: start; }
.catalog__filters h2 { font-size: 18px; margin-bottom: 20px; }
.filters-form fieldset { border: none; padding: 0; margin: 0 0 24px; }
.filters-form legend { font-family: var(--font-heading); font-weight: 700; font-size: 14px; color: var(--color-navy); margin-bottom: 10px; padding: 0; }
.filters-form label { display: flex; align-items: center; gap: 8px; font-size: 14px; margin-bottom: 8px; color: var(--color-graphite); }
.filters-form__reset { display: block; text-align: center; margin-top: 12px; font-size: 13px; color: var(--color-text-muted); text-decoration: underline; }

/* ---------- 20. MATERIALS TABLE ---------- */
.table-wrapper { overflow-x: auto; }
.compare-table { min-width: 560px; }
.compare-table th, .compare-table td { text-align: left; padding: 14px 18px; border-bottom: 1px solid var(--color-line); font-size: 14px; }
.compare-table th { font-family: var(--font-heading); color: var(--color-navy); background: var(--color-bg-alt); font-size: 13px; text-transform: uppercase; letter-spacing: 0.04em; }
.compare-table td:first-child { font-weight: 700; color: var(--color-navy); }

/* ---------- 21. PROCESS STEPS ---------- */
.process__grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.process-step { position: relative; padding: 28px 22px; border: 1px solid var(--color-line); border-radius: var(--radius); }
.process-step__number { position: absolute; top: 16px; right: 20px; font-family: var(--font-mono); font-size: 32px; font-weight: 500; color: var(--color-line); }
.process-step i { font-size: 26px; color: var(--color-gold-dark); margin-bottom: 16px; display: block; }
.process-step h3 { font-size: 16px; margin-bottom: 8px; }
.process-step p { font-size: 14px; }

/* ---------- 22. FLEET SERVICES ---------- */
.fleet-services { background: var(--color-bg-alt); }
.fleet-services__grid { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: center; }
.fleet-services__figure img { border-radius: var(--radius); box-shadow: var(--shadow-card); }

/* ---------- 23. WARRANTY ---------- */
.warranty__grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.warranty-item { text-align: center; padding: 32px 22px; border: 1px solid var(--color-line); border-radius: var(--radius); }
.warranty-item i { font-size: 32px; color: var(--color-gold-dark); margin-bottom: 16px; display: block; }
.warranty-item h3 { margin-bottom: 8px; }
.warranty-item p { font-size: 14px; }

/* ---------- 24. FAQ ---------- */
.faq__list { display: flex; flex-direction: column; gap: 12px; }
.faq-item { border: 1px solid var(--color-line); border-radius: var(--radius); padding: 18px 22px; }
.faq-item summary {
  cursor: pointer; list-style: none; font-family: var(--font-heading); font-weight: 700;
  color: var(--color-navy); display: flex; justify-content: space-between; align-items: center;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary i { transition: transform var(--transition); color: var(--color-gold-dark); }
.faq-item[open] summary i { transform: rotate(45deg); }
.faq-item p { margin-top: 14px; font-size: 14px; }

/* ---------- 25. HISTORY / ABOUT ---------- */
.history__grid { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 56px; align-items: center; }
.history p + p { margin-top: 16px; }
.history__figure img { border-radius: var(--radius); box-shadow: var(--shadow-card); }

/* ---------- 26. VALUES ---------- */
.values__grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.value-card { text-align: left; padding: 26px 22px; border: 1px solid var(--color-line); border-radius: var(--radius); }
.value-card i { font-size: 28px; color: var(--color-gold-dark); margin-bottom: 14px; display: block; }
.value-card h3 { font-size: 16px; margin-bottom: 8px; }
.value-card p { font-size: 14px; }

/* ---------- 27. STATS ---------- */
.stats { background: var(--color-navy); }
.stats__grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; text-align: center; }
.stat-item__number { display: block; font-family: var(--font-heading); font-weight: 800; font-size: 42px; color: var(--color-gold); }
.stat-item__label { display: block; font-size: 14px; color: rgba(255,255,255,0.75); margin-top: 8px; }

/* ---------- 28. CERTIFICATIONS ---------- */
.certifications__grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
.cert-badge {
  display: flex; align-items: center; gap: 12px; padding: 18px 22px;
  border: 1px solid var(--color-line); border-radius: var(--radius); font-weight: 600; color: var(--color-graphite); font-size: 14px;
}
.cert-badge i { color: var(--color-success); font-size: 22px; flex-shrink: 0; }

/* ---------- 29. CONTACT PAGE ---------- */
.contact__grid { display: grid; grid-template-columns: 0.9fr 1.1fr; gap: 56px; align-items: start; }
.contact-list { display: flex; flex-direction: column; gap: 16px; margin: 24px 0 28px; }
.contact-list li { display: flex; align-items: flex-start; gap: 12px; font-size: 15px; color: var(--color-graphite); }
.contact-list i { color: var(--color-gold-dark); font-size: 18px; margin-top: 2px; }
.contact-list a { font-weight: 700; color: var(--color-navy); }
.map-placeholder {
  border: 1px dashed var(--color-line); border-radius: var(--radius); background: var(--color-bg-alt);
  padding: 48px 24px; text-align: center; color: var(--color-text-muted);
}
.map-placeholder i { font-size: 32px; color: var(--color-navy); margin-bottom: 12px; display: block; }

/* ---------- 30. LEGAL PAGES ---------- */
.legal-content { max-width: 780px; }
.legal-content h2 { font-size: 20px; margin: 36px 0 12px; }
.legal-content h2:first-child { margin-top: 0; }
.legal-content p { margin-bottom: 12px; }
.legal-content ul { margin: 0 0 16px; display: flex; flex-direction: column; gap: 8px; }
.legal-content ul li { font-size: 15px; color: var(--color-text-muted); }
.legal-content ul li strong { color: var(--color-graphite); }
.legal-content .table-wrapper { margin-top: 12px; }

/* =========================================================
   RESPONSIVE BREAKPOINTS: 1200 / 992 / 768 / 576
   ========================================================= */

@media (max-width: 1200px) {
  .container { padding: 0 20px; }
}

@media (max-width: 992px) {
  h1 { font-size: 36px; }
  h2 { font-size: 28px; }
  .hero__grid, .vehicle-finder__grid, .why-us__grid, .fleet-services__grid,
  .history__grid, .contact__grid { grid-template-columns: 1fr; }
  .vehicle-finder__figure, .why-us__figure, .fleet-services__figure, .history__figure { order: -1; }
  .trust-strip__grid, .categories__grid, .products-grid, .testimonials__grid,
  .values__grid, .warranty__grid, .process__grid { grid-template-columns: repeat(2, 1fr); }
  .stats__grid { grid-template-columns: repeat(2, 1fr); gap: 32px; }
  .site-footer__grid { grid-template-columns: 1fr 1fr; }
  .catalog__grid { grid-template-columns: 1fr; }
  .main-nav { display: none; }
  .hamburger { display: flex; }
  main > section { padding: 64px 0; }
}

@media (max-width: 768px) {
  .site-header__inner { flex-wrap: wrap; }
  .main-nav {
    display: block; position: absolute; top: 100%; left: 0; right: 0;
    background: #fff; border-bottom: 1px solid var(--color-line);
    max-height: 0; overflow: hidden; transition: max-height var(--transition);
  }
  .main-nav.is-open { max-height: 400px; }
  .main-nav ul { flex-direction: column; gap: 0; padding: 12px 24px; }
  .main-nav a { display: block; padding: 12px 0; border-bottom: 1px solid var(--color-line); }
  .btn--nav { display: none; }
  .topbar__inner { flex-direction: column; align-items: flex-start; gap: 6px; }
  .topbar__contact { flex-wrap: wrap; }
  .form__row { grid-template-columns: 1fr; }
  .form__row--vehicle { grid-template-columns: 1fr; }
  .certifications__grid { grid-template-columns: 1fr; }
  .pre-footer-cta__inner { flex-direction: column; text-align: center; }
}

@media (max-width: 576px) {
  h1 { font-size: 30px; }
  h2 { font-size: 24px; }
  .lead-form { padding: 24px; }
  .trust-strip__grid, .categories__grid, .products-grid, .testimonials__grid,
  .values__grid, .warranty__grid, .process__grid, .stats__grid, .site-footer__grid {
    grid-template-columns: 1fr;
  }
  main > section { padding: 48px 0; }
  .hero { padding: 48px 0 64px; }
}