/* =============================================================
   ELEMENTAL TIRES — main.css
   Shared styles: tokens, reset, nav, footer, components
   ============================================================= */

/* =============================================================
   1. Tokens
   ============================================================= */
:root {
  --bg:        #0D0D0D;
  --bg-card:   #1A1A1A;
  --bg-card2:  #141414;
  --accent:    #E8650A;
  --accent-dim:#B54E08;
  --silver:    #C0C0C0;
  --text:      #F0F0F0;
  --text-muted:#888888;
  --border:    #2A2A2A;

  --font-head: 'Barlow Condensed', sans-serif;
  --font-body: 'IBM Plex Mono', monospace;
  --font-ui:   'Barlow', sans-serif;

  --ease-out:  cubic-bezier(0.16, 1, 0.3, 1);
  --ease-soft: cubic-bezier(0.25, 0.46, 0.45, 0.94);

  --nav-h: 112px;
  --gutter: clamp(1rem, 5vw, 4rem);
  --container: 1200px;
}

/* =============================================================
   2. Reset & Base
   ============================================================= */
*, *::before, *::after { box-sizing: border-box; margin: 0; }
html {
  -webkit-text-size-adjust: 100%;
  tab-size: 2;
  scroll-behavior: smooth;
  overflow-x: clip;
}
body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  background: var(--bg);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: clip;
  overscroll-behavior-y: none;
}
img, svg, video { display: block; max-width: 100%; }
img { height: auto; }
button { font: inherit; color: inherit; cursor: pointer; border: 0; background: none; }
a { color: inherit; text-decoration: none; }
p { text-wrap: pretty; }
h1, h2, h3, h4 {
  font-family: var(--font-head);
  text-wrap: balance;
  line-height: 1.0;
  letter-spacing: -0.01em;
  text-transform: uppercase;
}
::selection { background: var(--accent); color: #fff; }
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 4px;
}

/* =============================================================
   3. Utilities
   ============================================================= */
.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--gutter);
}
.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: fixed; top: -100px; left: 1rem;
  padding: .6rem 1rem; background: var(--text); color: var(--bg);
  z-index: 9999; border-radius: 4px; font-weight: 700;
}
.skip-link:focus { top: 1rem; }

/* =============================================================
   4. Scroll progress bar
   ============================================================= */
#scroll-bar {
  position: fixed;
  top: 0; left: 0;
  height: 3px;
  width: 0%;
  background: var(--accent);
  z-index: 9998;
  transition: width .1s linear;
}

/* =============================================================
   5. NAV
   ============================================================= */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--nav-h);
  background: rgba(13,13,13,.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  z-index: 900;
  display: flex;
  align-items: center;
}
.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--gutter);
}
.nav__logo {
  display: flex;
  align-items: center;
  flex-shrink: 0;
}
.nav__logo img {
  height: 96px;
  width: auto;
  display: block;
  /* Invert black logo → white on dark nav */
  filter: brightness(0) invert(1);
  transition: opacity .2s, transform .2s var(--ease-out);
}
.nav__logo:hover img {
  opacity: .85;
  transform: scale(1.04);
}

.nav__links {
  display: flex;
  align-items: center;
  gap: clamp(.8rem, 2vw, 1.8rem);
  list-style: none;
}
.nav__links a {
  font-family: var(--font-ui);
  font-size: .85rem;
  font-weight: 500;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--silver);
  transition: color .2s var(--ease-out);
}
.nav__links a:hover,
.nav__links a.active { color: var(--accent); }

.nav__right {
  display: flex;
  align-items: center;
  gap: .8rem;
  flex-shrink: 0;
}
.lang-toggle {
  display: flex;
  border: 1px solid var(--border);
  border-radius: 4px;
  overflow: hidden;
}
.lang-btn {
  font-family: var(--font-ui);
  font-size: .75rem;
  font-weight: 700;
  letter-spacing: .1em;
  padding: .3rem .6rem;
  background: transparent;
  color: var(--text-muted);
  transition: background .2s, color .2s;
}
.lang-btn.active {
  background: var(--accent);
  color: #fff;
}
.nav__cta {
  font-family: var(--font-ui);
  font-size: .82rem;
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
  padding: .55rem 1.2rem;
  background: var(--accent);
  color: #fff;
  border-radius: 4px;
  transition: background .2s var(--ease-out), transform .2s var(--ease-out);
  white-space: nowrap;
}
.nav__cta:hover {
  background: var(--accent-dim);
  transform: translateY(-1px);
}

/* Hamburger */
.nav__hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  cursor: pointer;
}
.nav__hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text);
  transition: transform .3s var(--ease-out), opacity .3s;
}
.nav__hamburger.is-open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav__hamburger.is-open span:nth-child(2) { opacity: 0; }
.nav__hamburger.is-open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Mobile nav drawer */
.nav__drawer {
  display: none;
  position: fixed;
  top: var(--nav-h); left: 0; right: 0;
  background: rgba(13,13,13,.97);
  border-bottom: 1px solid var(--border);
  padding: 1.5rem var(--gutter) 2rem;
  z-index: 899;
  flex-direction: column;
  gap: 1.2rem;
}
.nav__drawer.is-open { display: flex; }
.nav__drawer a {
  font-family: var(--font-head);
  font-size: 1.6rem;
  font-weight: 700;
  letter-spacing: .05em;
  text-transform: uppercase;
  color: var(--text);
  transition: color .2s;
}
.nav__drawer a:hover { color: var(--accent); }
.nav__drawer .nav__cta { align-self: flex-start; }

/* =============================================================
   6. FOOTER
   ============================================================= */
.footer {
  background: #0A0A0A;
  border-top: 1px solid var(--border);
  padding: 4rem var(--gutter) 2rem;
}
.footer__inner {
  max-width: var(--container);
  margin-inline: auto;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 3rem 2rem;
}
.footer__logo {
  margin-bottom: .8rem;
}
.footer__logo img {
  height: 63px;
  width: auto;
  filter: brightness(0) invert(1);
  opacity: .9;
}
.footer__tagline {
  font-size: .82rem;
  color: var(--text-muted);
  line-height: 1.6;
  max-width: 28ch;
}
.footer__col h4 {
  font-family: var(--font-ui);
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1rem;
}
.footer__col ul { list-style: none; display: flex; flex-direction: column; gap: .5rem; }
.footer__col a {
  font-size: .84rem;
  color: var(--text-muted);
  transition: color .2s;
}
.footer__col a:hover { color: var(--text); }
.footer__bottom {
  max-width: var(--container);
  margin-inline: auto;
  border-top: 1px solid var(--border);
  margin-top: 3rem;
  padding-top: 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}
.footer__copy {
  font-size: .78rem;
  color: var(--text-muted);
}
.footer__warranty {
  font-size: .78rem;
  color: var(--text-muted);
  white-space: nowrap;
}

/* =============================================================
   7. Reveal animations
   ============================================================= */
.reveal {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity .7s var(--ease-out), transform .7s var(--ease-out);
}
.reveal.is-visible {
  opacity: 1;
  transform: none;
}
.reveal[data-split] {
  opacity: 1;
  transform: none;
}

/* =============================================================
   8. Buttons
   ============================================================= */
.btn {
  display: inline-flex;
  align-items: center;
  gap: .6rem;
  font-family: var(--font-ui);
  font-size: .85rem;
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
  padding: .8rem 1.8rem;
  border-radius: 4px;
  transition: background .2s var(--ease-out), transform .2s var(--ease-out), box-shadow .2s;
  cursor: pointer;
}
.btn--primary {
  background: var(--accent);
  color: #fff;
  border: 2px solid var(--accent);
}
.btn--primary:hover {
  background: var(--accent-dim);
  border-color: var(--accent-dim);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(232,101,10,.3);
}
.btn--ghost {
  background: transparent;
  color: var(--text);
  border: 2px solid var(--border);
}
.btn--ghost:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-2px);
}
.btn--sm {
  font-size: .75rem;
  padding: .55rem 1.2rem;
}

/* =============================================================
   9. PR Badge
   ============================================================= */
.pr-badge {
  display: inline-block;
  font-family: var(--font-ui);
  font-size: .65rem;
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
  padding: .2rem .5rem;
  background: rgba(232,101,10,.15);
  border: 1px solid rgba(232,101,10,.4);
  color: var(--accent);
  border-radius: 3px;
}

/* =============================================================
   10. Spec Tables
   ============================================================= */
.spec-table-wrap {
  overflow-x: auto;
  margin-block: 1.5rem;
  border-radius: 6px;
  border: 1px solid var(--border);
}
.spec-table {
  width: 100%;
  border-collapse: collapse;
  font-size: .82rem;
}
.spec-table thead th {
  background: #111;
  padding: .75rem 1rem;
  text-align: left;
  font-family: var(--font-ui);
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--accent);
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}
.spec-table tbody tr {
  border-bottom: 1px solid var(--border);
  transition: background .15s;
}
.spec-table tbody tr:last-child { border-bottom: 0; }
.spec-table tbody tr:hover {
  background: #1F1F1F;
  border-left: 3px solid var(--accent);
}
.spec-table tbody td {
  padding: .65rem 1rem;
  color: var(--text-muted);
  white-space: nowrap;
}
.spec-table tbody td:first-child {
  font-weight: 700;
  color: var(--text);
  font-family: var(--font-ui);
}

/* =============================================================
   11. Search bar
   ============================================================= */
.search-wrap {
  display: flex;
  align-items: center;
  gap: .8rem;
  margin-bottom: 1.5rem;
}
.search-input {
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text);
  font-family: var(--font-body);
  font-size: .85rem;
  padding: .65rem 1rem;
  border-radius: 4px;
  width: 100%;
  max-width: 360px;
  transition: border-color .2s;
}
.search-input:focus {
  outline: none;
  border-color: var(--accent);
}
.search-input::placeholder { color: var(--text-muted); }
.search-label {
  font-family: var(--font-ui);
  font-size: .75rem;
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--text-muted);
  white-space: nowrap;
}

/* =============================================================
   12. Tabs
   ============================================================= */
.tabs-nav {
  display: flex;
  gap: .5rem;
  flex-wrap: wrap;
  border-bottom: 1px solid var(--border);
  margin-bottom: 2.5rem;
}
.tab-btn {
  font-family: var(--font-ui);
  font-size: .78rem;
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
  padding: .7rem 1.4rem;
  color: var(--text-muted);
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
  transition: color .2s, border-color .2s;
  cursor: pointer;
}
.tab-btn:hover { color: var(--text); }
.tab-btn.active {
  color: var(--accent);
  border-bottom-color: var(--accent);
}
.tab-panel { display: none; }
.tab-panel.active { display: block; }

/* =============================================================
   13. Product Card (for catalog items)
   ============================================================= */
.product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.5rem;
}
.product-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
  transition: border-color .25s var(--ease-out), transform .25s var(--ease-out), box-shadow .25s;
}
.product-card:hover {
  border-color: var(--accent);
  transform: translateY(-4px) scale(1.01);
  box-shadow: 0 12px 32px rgba(232,101,10,.15);
}
.product-card__img {
  aspect-ratio: 4/3;
  overflow: hidden;
  background: var(--bg-card2);
}
.product-card__img img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  padding: 1rem;
  transition: transform .4s var(--ease-out);
}
.product-card:hover .product-card__img img { transform: scale(1.05); }
.product-card__body {
  padding: 1.2rem 1.4rem;
}
.product-card__label {
  font-family: var(--font-ui);
  font-size: .68rem;
  font-weight: 700;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: .4rem;
}
.product-card__name {
  font-family: var(--font-head);
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: .5rem;
}
.product-card__desc {
  font-size: .82rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 1rem;
}
.product-card__meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: .5rem;
}

/* =============================================================
   14. Section headers
   ============================================================= */
.section-header {
  margin-bottom: 3rem;
}
.section-header .eyebrow {
  font-family: var(--font-ui);
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: .8rem;
  display: block;
}
.section-header h2 {
  font-size: clamp(2.4rem, 5vw, 4.8rem);
  font-weight: 900;
  line-height: .95;
  margin-bottom: 1rem;
}
.section-header p {
  font-size: .9rem;
  color: var(--text-muted);
  max-width: 60ch;
}

/* =============================================================
   15. Category Hero (sub-pages)
   ============================================================= */
.cat-hero {
  position: relative;
  height: clamp(280px, 45vh, 520px);
  display: flex;
  align-items: flex-end;
  overflow: hidden;
  margin-top: var(--nav-h);
}
.cat-hero__img {
  position: absolute;
  inset: 0;
}
.cat-hero__img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}
.cat-hero__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(13,13,13,.95) 0%, rgba(13,13,13,.5) 50%, rgba(13,13,13,.2) 100%);
}
.cat-hero__content {
  position: relative;
  z-index: 2;
  padding: 2.5rem var(--gutter) 2.5rem;
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
}
.cat-hero__content .eyebrow {
  font-family: var(--font-ui);
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: .5rem;
  display: block;
}
.cat-hero__content h1 {
  font-size: clamp(2.4rem, 6vw, 5.5rem);
  font-weight: 900;
  line-height: .92;
}

/* =============================================================
   16. Page layout
   ============================================================= */
.page-body {
  padding-top: 3rem;
  padding-bottom: 5rem;
}
.page-section {
  margin-bottom: 4rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border);
}
.page-section:first-child { border-top: 0; }

/* =============================================================
   17. Print styles
   ============================================================= */
@media print {
  .nav, .cat-hero, .tabs-nav, .btn, .search-wrap,
  #scroll-bar, .footer, .page-section > .section-header .section-img { display: none !important; }
  body { background: #fff; color: #000; }
  .spec-table { border: 1px solid #ccc; }
  .spec-table thead th { background: #f0f0f0; color: #000; }
  .spec-table tbody td { color: #333; }
  .product-card { break-inside: avoid; border: 1px solid #ccc; }
}

/* =============================================================
   18. Responsive
   ============================================================= */
@media (max-width: 960px) {
  .nav__links, .nav__cta { display: none; }
  .nav__hamburger { display: flex; }
  .footer__inner { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 540px) {
  .footer__inner { grid-template-columns: 1fr; }
  .footer__warranty { text-align: left; }
  .footer__bottom { flex-direction: column; align-items: flex-start; }
}

/* =============================================================
   19. Reduced motion — only intrusive effects
   ============================================================= */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}