/* ==========================================================================
   The Automotive Collective — base styles
   Structure: tokens → base → layout → components → sections → responsive
   Marketplace pages (auctions, listing detail, sell) should reuse the
   tokens + components here (.btn, .chip, .card, .tag, .field).
   ========================================================================== */

/* ---------- Tokens ---------- */
:root {
  --black: #0a0a0a;
  --ink: #141414;
  --gray-700: #3a3a3a;
  --gray-500: #6b6b6b;
  --gray-300: #c9c9c9;
  --gray-150: #e8e8e8;
  --gray-50: #f6f6f5;
  --white: #ffffff;
  --accent: #ff6b4a;          /* coral — use sparingly */

  --font: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --font-display: "Inter Tight", var(--font);

  --radius: 4px;
  --radius-lg: 10px;
  --container: 1200px;
  --gutter: clamp(20px, 4vw, 40px);
  --section-y: clamp(80px, 11vw, 150px);
  --ease: cubic-bezier(.2, .7, .2, 1);
}

/* ---------- Base ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 76px; }
body {
  margin: 0;
  font-family: var(--font);
  font-size: 17px;
  line-height: 1.6;
  color: var(--ink);
  background: var(--white);
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; }
h1, h2, h3, h4 { font-family: var(--font-display); line-height: 1.08; margin: 0; letter-spacing: -0.02em; }
p { margin: 0; }
button, input, select { font: inherit; color: inherit; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }

.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.skip-link { position: absolute; left: -9999px; top: 8px; background: var(--black); color: var(--white); padding: 8px 14px; z-index: 100; }
.skip-link:focus { left: 8px; }

/* ---------- Layout ---------- */
.container { width: 100%; max-width: var(--container); margin: 0 auto; padding: 0 var(--gutter); }
.section { padding: var(--section-y) 0; }
.section--dark { background: var(--black); color: var(--white); }
.section--muted { background: var(--gray-50); }
.section__head { display: flex; justify-content: space-between; align-items: end; gap: 24px; }
.section__title { font-size: clamp(34px, 5vw, 60px); font-weight: 800; max-width: 16ch; margin-bottom: 20px; }
.section__lede { color: var(--gray-500); font-size: 19px; max-width: 58ch; margin-bottom: 32px; }
.section--dark .section__lede { color: var(--gray-300); }
.split { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(40px, 6vw, 90px); align-items: center; }

.eyebrow {
  display: flex; align-items: center; gap: 12px;
  font-size: 12px; font-weight: 700; letter-spacing: .18em; text-transform: uppercase;
  color: var(--gray-500); margin-bottom: 20px;
}
.eyebrow::before { content: ""; width: 28px; height: 2px; background: var(--accent); }
.eyebrow--light { color: var(--gray-300); }

/* ---------- Components ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 15px 26px; border-radius: var(--radius); border: 1.5px solid transparent;
  font-size: 15px; font-weight: 600; letter-spacing: .01em; text-decoration: none;
  cursor: pointer; transition: background .2s var(--ease), color .2s var(--ease), border-color .2s var(--ease), transform .2s var(--ease);
}
.btn:hover { transform: translateY(-1px); }
.btn--sm { padding: 9px 16px; font-size: 14px; }
.btn--dark { background: var(--black); color: var(--white); }
.btn--dark:hover { background: var(--gray-700); }
.btn--light { background: var(--white); color: var(--black); }
.btn--light:hover { background: var(--gray-150); }
.btn--ghost { border-color: var(--black); color: var(--black); background: transparent; }
.btn--ghost:hover { background: var(--black); color: var(--white); }

.tag {
  display: inline-block; padding: 4px 10px; border-radius: 999px;
  font-size: 11px; font-weight: 700; letter-spacing: .1em; text-transform: uppercase;
  border: 1px solid var(--gray-300); color: var(--gray-500); background: var(--white);
}
.tag--live { border-color: var(--black); color: var(--black); }
.tag--accent { border-color: var(--accent); color: var(--accent); letter-spacing: .08em; }

.chip {
  padding: 9px 18px; border-radius: 999px; border: 1.5px solid var(--gray-150);
  background: var(--white); font-size: 14px; font-weight: 600; cursor: pointer;
  transition: all .15s var(--ease);
}
.chip:hover { border-color: var(--black); }
.chip.is-selected { background: var(--black); border-color: var(--black); color: var(--white); }

.field input, .field select {
  height: 44px; padding: 0 14px; border: 1.5px solid var(--gray-150); border-radius: var(--radius);
  background: var(--white); min-width: 180px;
}
.field input:focus, .field select:focus { border-color: var(--black); outline: none; }
.field select:disabled { color: var(--gray-300); cursor: not-allowed; }

.link-arrow { font-weight: 600; text-decoration: none; border-bottom: 1.5px solid var(--accent); padding-bottom: 2px; }

/* ---------- Header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255,255,255,.88); backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid transparent; transition: border-color .2s;
}
.site-header.is-scrolled { border-bottom-color: var(--gray-150); }
.nav { display: flex; align-items: center; justify-content: space-between; height: 72px; }
.nav__brand { display: flex; align-items: center; gap: 12px; text-decoration: none; font-weight: 800; font-size: 13px; letter-spacing: .14em; text-transform: uppercase; }
.nav__brand img { width: 40px; height: auto; }
.nav__menu { display: flex; align-items: center; gap: 32px; }
.nav__menu a:not(.btn) { text-decoration: none; font-size: 15px; font-weight: 500; color: var(--gray-700); }
.nav__menu a:not(.btn):hover { color: var(--black); }
.nav__toggle { display: none; background: none; border: 0; width: 40px; height: 40px; cursor: pointer; position: relative; }
.nav__toggle span { position: absolute; left: 9px; right: 9px; height: 2px; background: var(--black); transition: transform .2s; }
.nav__toggle span:first-child { top: 15px; }
.nav__toggle span:last-child { top: 23px; }
.nav__toggle[aria-expanded="true"] span:first-child { transform: translateY(4px) rotate(45deg); }
.nav__toggle[aria-expanded="true"] span:last-child { transform: translateY(-4px) rotate(-45deg); }

/* ---------- Hero ---------- */
.hero { padding: clamp(60px, 9vw, 120px) 0 clamp(80px, 11vw, 150px); text-align: center; border-bottom: 1px solid var(--gray-150); }
.hero__inner { display: flex; flex-direction: column; align-items: center; }
.hero__logo { width: min(440px, 78vw); margin-bottom: clamp(48px, 7vw, 80px); }
.hero__title { font-size: clamp(38px, 6.4vw, 80px); font-weight: 800; letter-spacing: -0.035em; }
.hero__title span { color: var(--gray-500); }
.hero__lede { max-width: 56ch; margin: 28px auto 40px; font-size: clamp(17px, 1.6vw, 20px); color: var(--gray-500); }
.hero__ctas { display: flex; flex-wrap: wrap; gap: 14px; justify-content: center; }

/* ---------- Roadmap (About) ---------- */
.roadmap { list-style: none; padding: 0; margin: 56px 0 0; display: grid; grid-template-columns: repeat(3, 1fr); gap: 0; border-top: 2px solid var(--black); }
.roadmap__step { padding: 32px 32px 8px 0; position: relative; }
.roadmap__step + .roadmap__step { padding-left: 32px; border-left: 1px solid var(--gray-150); }
.roadmap__num { display: block; font-family: var(--font-display); font-size: 14px; font-weight: 700; color: var(--gray-300); margin-bottom: 18px; }
.roadmap__step.is-active .roadmap__num { color: var(--accent); }
.roadmap__step h3 { font-size: 28px; margin-bottom: 12px; }
.roadmap__step p { color: var(--gray-500); margin-bottom: 20px; }

/* ---------- Instagram grid ---------- */
.ig-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; }
.ig-tile {
  aspect-ratio: 1; border-radius: var(--radius); display: flex; align-items: flex-end; padding: 14px;
  background: linear-gradient(155deg, #262626 0%, #121212 70%); border: 1px solid #222;
  font-size: 12px; font-weight: 600; letter-spacing: .1em; text-transform: uppercase; color: var(--gray-300);
  transition: transform .3s var(--ease);
}
.ig-tile:hover { transform: scale(1.02); }
.ig-tile--mark { align-items: center; justify-content: center; background: var(--accent); border-color: var(--accent); }
.ig-tile--mark img { width: 46%; }

/* ---------- Marketplace ---------- */
.filters { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 16px; padding: 20px 0; margin: 24px 0 32px; border-top: 1px solid var(--gray-150); border-bottom: 1px solid var(--gray-150); }
.filters__tabs, .filters__controls { display: flex; flex-wrap: wrap; gap: 10px; }

.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.cards__empty { color: var(--gray-500); padding: 40px 0; text-align: center; }
.card { display: flex; flex-direction: column; border-radius: var(--radius-lg); overflow: hidden; background: var(--white); border: 1px solid var(--gray-150); transition: transform .3s var(--ease), box-shadow .3s var(--ease); }
.card:hover { transform: translateY(-4px); box-shadow: 0 18px 40px -20px rgba(0,0,0,.25); }
.card__media {
  position: relative; aspect-ratio: 4 / 3; display: flex; align-items: center; justify-content: center;
  background:
    repeating-linear-gradient(135deg, transparent 0 22px, rgba(0,0,0,.025) 22px 44px),
    linear-gradient(160deg, var(--gray-50), var(--gray-150));
}
.card__media img { width: 22%; opacity: .14; }
.card__badge { position: absolute; top: 14px; left: 14px; }
.card__type { position: absolute; top: 14px; right: 14px; background: var(--black); color: var(--white); border-color: var(--black); }
.card__body { padding: 20px 22px 22px; display: flex; flex-direction: column; gap: 6px; flex: 1; }
.card__meta { font-size: 12px; font-weight: 700; letter-spacing: .12em; text-transform: uppercase; color: var(--gray-500); }
.card__title { font-size: 21px; font-weight: 700; }
.card__desc { color: var(--gray-500); font-size: 15px; }
.card__foot { margin-top: auto; padding-top: 16px; border-top: 1px solid var(--gray-150); display: flex; justify-content: space-between; font-size: 14px; color: var(--gray-500); }
.card__foot strong { color: var(--ink); }

.cta-band { margin-top: 64px; padding: clamp(28px, 4vw, 48px); border-radius: var(--radius-lg); background: var(--black); color: var(--white); display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; gap: 24px; }
.cta-band h3 { font-size: 28px; margin-bottom: 8px; }
.cta-band p { color: var(--gray-300); max-width: 52ch; }
.cta-band__actions { display: flex; flex-wrap: wrap; gap: 12px; }
.cta-band .btn--dark { background: var(--white); color: var(--black); }
.cta-band .btn--ghost { border-color: var(--white); color: var(--white); }
.cta-band .btn--ghost:hover { background: var(--white); color: var(--black); }

/* ---------- Events ---------- */
.events { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; margin-top: 48px; }
.event { background: var(--white); padding: 32px; border-radius: var(--radius-lg); display: flex; flex-direction: column; gap: 12px; align-items: flex-start; border: 1px solid var(--gray-150); }
.event__kicker { font-size: 12px; font-weight: 700; letter-spacing: .14em; text-transform: uppercase; color: var(--accent); }
.event h3 { font-size: 24px; }
.event p:not(.event__kicker) { color: var(--gray-500); flex: 1; }

/* ---------- Footer ---------- */
.site-footer { background: var(--black); color: var(--white); padding: 80px 0 32px; }
.footer { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 48px; }
.footer__brand img { width: 240px; }
.footer__cols { display: flex; flex-wrap: wrap; gap: clamp(32px, 6vw, 80px); }
.footer__cols h4 { font-size: 12px; letter-spacing: .16em; text-transform: uppercase; color: var(--gray-500); margin-bottom: 16px; font-family: var(--font); }
.footer__cols a { display: block; text-decoration: none; color: var(--gray-300); margin-bottom: 10px; font-size: 15px; }
.footer__cols a:hover { color: var(--white); }
.footer__legal { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 12px; margin-top: 64px; padding-top: 24px; border-top: 1px solid #222; font-size: 13px; color: var(--gray-500); }

/* ---------- Reveal-on-scroll (progressive; no-JS shows everything) ---------- */
.js .reveal { opacity: 0; transform: translateY(18px); transition: opacity .7s var(--ease), transform .7s var(--ease); }
.js .reveal.is-visible { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .js .reveal { opacity: 1; transform: none; transition: none; }
}

/* ---------- Responsive ---------- */
@media (max-width: 980px) {
  .cards, .events { grid-template-columns: repeat(2, 1fr); }
  .split { grid-template-columns: 1fr; }
}
@media (max-width: 760px) {
  body { font-size: 16px; }
  .nav__toggle { display: block; }
  .nav__brand span { display: none; }
  .nav__menu {
    position: absolute; top: 72px; left: 0; right: 0; flex-direction: column; align-items: stretch; gap: 0;
    background: var(--white); border-bottom: 1px solid var(--gray-150); padding: 8px var(--gutter) 20px;
    display: none;
  }
  .nav__menu.is-open { display: flex; }
  .nav__menu a:not(.btn) { padding: 14px 0; border-bottom: 1px solid var(--gray-150); font-size: 17px; }
  .nav__menu .btn { margin-top: 16px; }
  .roadmap { grid-template-columns: 1fr; }
  .roadmap__step, .roadmap__step + .roadmap__step { padding: 28px 0 12px; border-left: 0; border-bottom: 1px solid var(--gray-150); }
  .cards, .events { grid-template-columns: 1fr; }
  .filters__controls, .field, .field input, .field select { width: 100%; }
  .hero__ctas .btn, .cta-band__actions .btn { width: 100%; }
}