/* ==========================================================================
   OSW Import Fest 2027 — design tokens + public shell styles
   Direction (Phase 0 Rev 3 §10): dark-first, motorsport-grade.
   Lime is for CTAs and key data; chrome gradients for display headings only;
   one motif per screen; lime never carries text on light surfaces.
   ========================================================================== */

/* ---- Self-hosted fonts (SIL OFL — license files alongside) ---------------- */
@font-face {
  font-family: "Chakra Petch"; font-style: normal; font-weight: 600; font-display: swap;
  src: url("/assets/fonts/chakra-petch-latin-600-normal.woff2") format("woff2");
}
@font-face {
  font-family: "Chakra Petch"; font-style: italic; font-weight: 600; font-display: swap;
  src: url("/assets/fonts/chakra-petch-latin-600-italic.woff2") format("woff2");
}
@font-face {
  font-family: "Chakra Petch"; font-style: normal; font-weight: 700; font-display: swap;
  src: url("/assets/fonts/chakra-petch-latin-700-normal.woff2") format("woff2");
}
@font-face {
  font-family: "Chakra Petch"; font-style: italic; font-weight: 700; font-display: swap;
  src: url("/assets/fonts/chakra-petch-latin-700-italic.woff2") format("woff2");
}
@font-face {
  font-family: "Inter"; font-style: normal; font-weight: 400; font-display: swap;
  src: url("/assets/fonts/inter-latin-400-normal.woff2") format("woff2");
}
@font-face {
  font-family: "Inter"; font-style: normal; font-weight: 500; font-display: swap;
  src: url("/assets/fonts/inter-latin-500-normal.woff2") format("woff2");
}
@font-face {
  font-family: "Inter"; font-style: normal; font-weight: 600; font-display: swap;
  src: url("/assets/fonts/inter-latin-600-normal.woff2") format("woff2");
}

/* ---- Tokens -------------------------------------------------------------- */
:root {
  /* Color — measured from IF.pdf */
  --bg:           #0a0a0c;
  --bg-raise:     #121216;
  --bg-panel:     #17171c;
  --line:         #26262c;

  --lime:         #8fd808;
  --lime-bright:  #a0e810;
  --lime-glow:    #bef74f;
  --lime-deep:    #68b800;
  --lime-ink:     #101400;   /* text on lime */

  --chrome-hi:    #f0f0f0;
  --chrome:       #c0c0c0;
  --chrome-lo:    #909090;

  --text:         #e8e8ea;
  --text-dim:     #a8a8b0;

  /* Type */
  --font-display: "Chakra Petch", "Arial Narrow", sans-serif;
  --font-body:    "Inter", system-ui, -apple-system, sans-serif;

  /* Rhythm */
  --wrap:         72rem;
  --space-1: .5rem; --space-2: 1rem; --space-3: 1.75rem;
  --space-4: 3rem;  --space-5: 5rem;

  --radius: .375rem;
}

/* ---- Reset-ish ------------------------------------------------------------ */
*, *::before, *::after { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
.wrap { max-width: var(--wrap); margin-inline: auto; padding-inline: var(--space-2); }
.sr-only {
  position: absolute; width: 1px; height: 1px; overflow: hidden;
  clip: rect(0 0 0 0); white-space: nowrap;
}
.skip-link {
  position: absolute; left: -999px; top: 0; z-index: 99;
  background: var(--lime); color: var(--lime-ink); padding: .5rem 1rem;
  font-weight: 600; text-decoration: none;
}
.skip-link:focus { left: 0; }

/* ---- Type ----------------------------------------------------------------- */
h1, h2, h3 {
  font-family: var(--font-display);
  font-style: italic;
  text-transform: uppercase;
  letter-spacing: .02em;
  line-height: 1.12;
  margin: 0 0 var(--space-2);
}
h1 { font-size: clamp(2.2rem, 6vw, 4rem); }
h2 { font-size: clamp(1.5rem, 3.5vw, 2.2rem); }
h3 { font-size: 1.15rem; }
p  { margin: 0 0 var(--space-2); }
a  { color: var(--lime-bright); }
a:hover { color: var(--lime-glow); }
a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible {
  outline: 2px solid var(--lime-bright); outline-offset: 2px;
}

/* Chrome gradient — display headings only */
.chrome-text {
  background: linear-gradient(180deg, var(--chrome-hi) 0%, var(--chrome) 45%, var(--chrome-lo) 55%, var(--chrome-hi) 100%);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.lime-text { color: var(--lime-bright); }

/* ---- Buttons -------------------------------------------------------------- */
.btn {
  display: inline-block;
  font-family: var(--font-display); font-style: italic; font-weight: 700;
  text-transform: uppercase; letter-spacing: .04em; text-decoration: none;
  padding: .8rem 1.6rem; border-radius: var(--radius);
  border: 2px solid transparent; cursor: pointer; font-size: 1rem;
}
.btn-primary { background: var(--lime); color: var(--lime-ink); }
.btn-primary:hover { background: var(--lime-glow); color: var(--lime-ink); }
.btn-ghost { border-color: var(--chrome-lo); color: var(--chrome-hi); background: transparent; }
.btn-ghost:hover { border-color: var(--lime); color: var(--lime-bright); }

/* ---- Header --------------------------------------------------------------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(10,10,12,.92); backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.header-inner { display: flex; align-items: center; gap: var(--space-2); padding-block: .6rem; }
.brand { display: flex; align-items: center; gap: .6rem; text-decoration: none; }
/* Brand text: plain accessible label beside the supplied logo image —
   deliberately NOT a styled recreation of the logo wordmark. */
.brand-text {
  font-family: var(--font-body); font-weight: 600;
  color: var(--chrome-hi); font-size: 1rem; letter-spacing: .02em;
}
.primary-nav { margin-left: auto; }
.primary-nav ul { display: flex; gap: .25rem; list-style: none; margin: 0; padding: 0; }
.primary-nav a {
  display: block; padding: .55rem .8rem; text-decoration: none;
  font-family: var(--font-display); font-style: italic; font-weight: 600;
  text-transform: uppercase; font-size: .92rem; letter-spacing: .04em;
  color: var(--chrome); border-radius: var(--radius);
}
.primary-nav a:hover { color: var(--lime-bright); }
.primary-nav a[aria-current="page"] { color: var(--lime); }
.nav-toggle { display: none; }

@media (max-width: 47rem) {
  .nav-toggle {
    display: inline-flex; align-items: center; justify-content: center;
    margin-left: auto; width: 2.75rem; height: 2.75rem;
    background: none; border: 1px solid var(--line); border-radius: var(--radius);
  }
  .nav-toggle-bar, .nav-toggle-bar::before, .nav-toggle-bar::after {
    content: ""; display: block; width: 1.25rem; height: 2px; background: var(--chrome-hi); position: relative;
  }
  .nav-toggle-bar::before { position: absolute; top: -6px; }
  .nav-toggle-bar::after  { position: absolute; top: 6px; }
  .primary-nav { display: none; width: 100%; }
  .primary-nav.open { display: block; }
  .primary-nav ul { flex-direction: column; padding-block: .5rem; }
  .header-inner { flex-wrap: wrap; }
}

/* ---- Hero ------------------------------------------------------------------ */
.hero {
  position: relative; overflow: hidden;
  padding-block: var(--space-5) var(--space-4);
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(60rem 30rem at 70% -10%, rgba(143,216,8,.10), transparent 60%),
    var(--bg);
}
.hero-inner { display: grid; gap: var(--space-3); grid-template-columns: 1fr; align-items: center; }
@media (min-width: 56rem) { .hero-inner { grid-template-columns: 1.2fr .8fr; } }
.hero-logo { max-width: 20rem; margin-inline: auto; }
.hero-title { color: var(--chrome-hi); }   /* plain heading; logo image carries the brand */
.hero-kicker {
  font-family: var(--font-display); font-style: italic; font-weight: 600;
  text-transform: uppercase; letter-spacing: .14em; color: var(--lime);
  margin-bottom: var(--space-1); font-size: .95rem;
}
.hero-datebar {
  display: inline-flex; flex-wrap: wrap; gap: .4rem 1.2rem; align-items: baseline;
  font-family: var(--font-display); font-style: italic; font-weight: 700;
  text-transform: uppercase; letter-spacing: .05em;
  color: var(--chrome-hi); font-size: 1.15rem;
  border-left: 3px solid var(--lime); padding-left: .8rem; margin-block: var(--space-2);
}
.hero-datebar .sep { color: var(--chrome-lo); }
.hero-ctas { display: flex; flex-wrap: wrap; gap: var(--space-1); margin-top: var(--space-2); }

/* Speed-line divider — the one motif on most screens */
.speedline {
  height: 3px; border: 0; margin: 0;
  background: linear-gradient(90deg, transparent, var(--lime) 20%, var(--lime) 80%, transparent);
  opacity: .6;
}

/* ---- Sections -------------------------------------------------------------- */
.section { padding-block: var(--space-4); }
.section-alt { background: var(--bg-raise); border-block: 1px solid var(--line); }
.section-head { max-width: 46rem; margin-bottom: var(--space-3); }
.section-head p { color: var(--text-dim); }

/* Angled panel cards */
.card-grid { display: grid; gap: var(--space-2); grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr)); }
.card {
  background: var(--bg-panel); border: 1px solid var(--line); border-radius: var(--radius);
  padding: var(--space-3);
  clip-path: polygon(0 0, calc(100% - 14px) 0, 100% 14px, 100% 100%, 14px 100%, 0 calc(100% - 14px));
}
.card h3 { color: var(--chrome-hi); }
.card p { color: var(--text-dim); margin-bottom: 0; }
.card .card-cta { margin-top: var(--space-2); }

/* Status chip for TBA content */
.tba {
  display: inline-block; font-size: .78rem; font-weight: 600;
  text-transform: uppercase; letter-spacing: .08em;
  color: var(--lime-bright); border: 1px solid var(--lime-deep);
  padding: .15rem .55rem; border-radius: 999px; vertical-align: middle;
}

/* ---- Countdown ------------------------------------------------------------- */
.countdown { display: flex; gap: var(--space-2); flex-wrap: wrap; }
.countdown .unit {
  min-width: 5.2rem; text-align: center; background: var(--bg-panel);
  border: 1px solid var(--line); border-radius: var(--radius); padding: var(--space-2) var(--space-1);
}
.countdown .num {
  display: block; font-family: var(--font-display); font-style: italic; font-weight: 700;
  font-size: 2rem; color: var(--lime); line-height: 1;
}
.countdown .lbl { font-size: .75rem; text-transform: uppercase; letter-spacing: .1em; color: var(--text-dim); }

/* ---- Schedule table --------------------------------------------------------- */
.day-block { margin-bottom: var(--space-3); }
.day-block h3 { display: flex; align-items: baseline; gap: .8rem; }
.day-date { color: var(--lime); }

/* ---- Forms ------------------------------------------------------------------ */
.form-grid { display: grid; gap: var(--space-2); max-width: 34rem; }
label { font-weight: 600; font-size: .92rem; display: block; margin-bottom: .3rem; }
input[type="text"], input[type="email"], textarea {
  width: 100%; padding: .7rem .8rem; border-radius: var(--radius);
  border: 1px solid var(--line); background: var(--bg-panel); color: var(--text);
  font: inherit;
}
textarea { min-height: 9rem; resize: vertical; }
.hp-field { position: absolute; left: -9999px; }  /* honeypot */
.form-note { font-size: .85rem; color: var(--text-dim); }
.flash-ok {
  border: 1px solid var(--lime-deep); background: rgba(143,216,8,.08);
  color: var(--lime-glow); padding: var(--space-2); border-radius: var(--radius);
  margin-bottom: var(--space-2);
}
.flash-err {
  border: 1px solid #a04040; background: rgba(200,80,80,.08);
  color: #e8b0b0; padding: var(--space-2); border-radius: var(--radius);
  margin-bottom: var(--space-2);
}

/* ---- Update strip ------------------------------------------------------------ */
.updates { background: var(--bg-raise); border-block: 1px solid var(--line); }
.updates-inner { display: grid; gap: var(--space-2); align-items: center; }
@media (min-width: 48rem) { .updates-inner { grid-template-columns: 1fr auto; } }
.updates form { display: flex; gap: .5rem; flex-wrap: wrap; }
.updates input[type="email"] { min-width: 16rem; }

/* ---- Footer ------------------------------------------------------------------- */
.site-footer { border-top: 1px solid var(--line); background: #08080a; padding-top: var(--space-4); }
.footer-grid { display: grid; gap: var(--space-3); grid-template-columns: repeat(auto-fit, minmax(12rem, 1fr)); }
.site-footer h2 {
  font-size: .85rem; letter-spacing: .12em; color: var(--chrome-lo); margin-bottom: var(--space-1);
}
.site-footer ul { list-style: none; margin: 0; padding: 0; }
.site-footer li { margin-bottom: .35rem; }
.site-footer a { color: var(--chrome); text-decoration: none; }
.site-footer a:hover { color: var(--lime-bright); }
.footer-brand p { color: var(--text-dim); font-size: .92rem; }
.footer-legal { border-top: 1px solid var(--line); margin-top: var(--space-3); padding-block: var(--space-2); }
.footer-legal p { color: var(--chrome-lo); font-size: .82rem; margin: 0; }

/* ---- Content pages -------------------------------------------------------------- */
.page-head { padding-block: var(--space-4) 0; }
.page-head .hero-title { color: var(--chrome-hi); }   /* plain heading; logo image carries the brand */
.hero-kicker { margin-bottom: .25rem; }
.prose { max-width: 46rem; }
.prose h2 { margin-top: var(--space-3); }
.prose ul { color: var(--text-dim); }

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
}

/* ---- 2027 race classes + class rulebook ---------------------------------- */
.page-lead {
  max-width: 46rem;
  color: var(--text-dim);
  font-size: clamp(1rem, 2vw, 1.2rem);
}

.class-page-head,
.rules-page-head { padding-bottom: var(--space-3); }

.class-showcase {
  background:
    radial-gradient(45rem 22rem at 90% 0%, rgba(143,216,8,.075), transparent 60%),
    var(--bg);
}

.race-class-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-2);
}

.race-class-card {
  position: relative;
  min-height: 22rem;
  overflow: hidden;
  display: flex;
  align-items: flex-end;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background:
    linear-gradient(145deg, rgba(143,216,8,.08), transparent 42%),
    linear-gradient(180deg, #17181c 0%, #0e0f12 100%);
  clip-path: polygon(0 0, calc(100% - 20px) 0, 100% 20px, 100% 100%, 20px 100%, 0 calc(100% - 20px));
}

.race-class-card::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(115deg, transparent 58%, rgba(255,255,255,.035) 58.5%, transparent 59%);
}

.class-number {
  position: absolute;
  top: -.35rem;
  right: .7rem;
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 700;
  font-size: clamp(5rem, 9vw, 7.5rem);
  line-height: 1;
  color: rgba(255,255,255,.045);
}

.class-card-body {
  position: relative;
  z-index: 1;
  width: 100%;
  padding: var(--space-3);
}

.class-label,
.rule-class-index {
  margin: 0 0 .4rem;
  color: var(--lime);
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .12em;
  font-size: .78rem;
}

.race-class-card h2 {
  min-height: 2.4em;
  margin-bottom: var(--space-2);
  color: var(--chrome-hi);
  font-size: clamp(1.55rem, 3vw, 2.3rem);
}

.class-meta {
  display: flex;
  flex-wrap: wrap;
  gap: .55rem;
  margin-bottom: var(--space-2);
  color: var(--text-dim);
  font-size: .84rem;
  text-transform: uppercase;
  letter-spacing: .05em;
}
.class-meta span {
  padding: .3rem .55rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255,255,255,.025);
}

.class-bottom-cta,
.rules-notice {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
}
.class-bottom-cta > div,
.rules-notice > div { max-width: 46rem; }
.class-bottom-cta p:last-child,
.rules-notice p:last-child { color: var(--text-dim); margin-bottom: 0; }

.rules-jump {
  position: sticky;
  top: 4.2rem;
  z-index: 20;
  border-bottom: 1px solid var(--line);
  background: rgba(10,10,12,.94);
  backdrop-filter: blur(8px);
}
.rules-jump-inner {
  display: flex;
  gap: .55rem;
  align-items: center;
  flex-wrap: wrap;
  padding-block: .7rem;
  font-size: .84rem;
}
.rules-jump-inner > span {
  color: var(--chrome-lo);
  text-transform: uppercase;
  letter-spacing: .08em;
  font-weight: 600;
}
.rules-jump a {
  display: inline-flex;
  padding: .35rem .7rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  text-decoration: none;
  color: var(--chrome-hi);
  font-family: var(--font-display);
  font-style: italic;
  text-transform: uppercase;
}
.rules-jump a:hover { border-color: var(--lime); color: var(--lime); }

.rulebook-stack { display: grid; gap: var(--space-4); }
.rule-class {
  scroll-margin-top: 8.5rem;
  border-top: 3px solid var(--lime);
  background: linear-gradient(180deg, rgba(255,255,255,.025), transparent 9rem);
}
.rule-class-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: var(--space-2);
  padding: var(--space-3) 0 var(--space-2);
}
.rule-class-head h2 {
  margin: 0;
  color: var(--chrome-hi);
  font-size: clamp(2rem, 5vw, 3.4rem);
}
.back-to-top {
  flex: 0 0 auto;
  color: var(--text-dim);
  font-size: .78rem;
  text-decoration: none;
  text-transform: uppercase;
  letter-spacing: .07em;
}
.back-to-top:hover { color: var(--lime); }

.rule-section-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-2);
}
.rule-section-card {
  padding: var(--space-2);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--bg-panel);
}
.rule-section-card h3 {
  margin-bottom: .65rem;
  color: var(--lime);
  font-size: 1rem;
  letter-spacing: .07em;
}
.rule-section-card ul {
  margin: 0;
  padding-left: 1.15rem;
  color: var(--text);
}
.rule-section-card li { margin: .4rem 0; }
.rule-section-card li::marker { color: var(--lime); }
.rules-empty,
.rules-empty-inline {
  padding: var(--space-3);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--bg-panel);
  color: var(--text-dim);
}
.rules-empty h2 { color: var(--chrome-hi); }

@media (max-width: 58rem) {
  .race-class-grid { grid-template-columns: 1fr; }
  .race-class-card { min-height: 16rem; }
  .race-class-card h2 { min-height: 0; }
  .rule-section-grid { grid-template-columns: 1fr; }
}

@media (max-width: 42rem) {
  .class-bottom-cta,
  .rules-notice,
  .rule-class-head { align-items: flex-start; flex-direction: column; }
  .rules-jump { top: 3.9rem; }
  .rules-jump-inner { gap: .4rem; }
}

/* Dedicated class rule pages */
.class-detail-head { padding-bottom: var(--space-3); }
.class-detail-index {
  margin: 0 0 .45rem;
  color: var(--text-dim);
  font-family: var(--font-display);
  font-weight: 700;
  font-style: italic;
  text-transform: uppercase;
  letter-spacing: .12em;
}
.class-detail-actions { display: flex; flex-wrap: wrap; gap: .65rem; margin-top: var(--space-2); }
.class-detail-rulebook {
  background: radial-gradient(50rem 26rem at 85% 0%, rgba(143,216,8,.07), transparent 65%), var(--bg);
}
.class-rule-summary {
  display: grid;
  grid-template-columns: repeat(3, minmax(0,1fr));
  gap: 1px;
  margin-bottom: var(--space-3);
  border: 1px solid var(--line);
  background: var(--line);
}
.class-rule-summary > div { padding: 1rem 1.15rem; background: var(--bg-panel); }
.class-rule-summary-label {
  display: block;
  margin-bottom: .2rem;
  color: var(--text-dim);
  font-size: .72rem;
  text-transform: uppercase;
  letter-spacing: .09em;
}
.class-rule-summary strong { color: var(--chrome-hi); font-family: var(--font-display); font-size: 1.08rem; }
.class-rule-sections { display: grid; gap: 1rem; max-width: 58rem; }
.class-rule-section {
  position: relative;
  padding: clamp(1.15rem, 3vw, 1.75rem);
  border: 1px solid var(--line);
  border-left: 3px solid var(--lime);
  border-radius: var(--radius);
  background: linear-gradient(135deg, rgba(143,216,8,.035), transparent 45%), var(--bg-panel);
}
.class-rule-section h2 {
  margin: 0 0 .8rem;
  color: var(--lime);
  font-size: clamp(1.05rem, 2vw, 1.3rem);
  text-transform: uppercase;
  letter-spacing: .055em;
}
.class-rule-section ul { margin: 0; padding-left: 1.2rem; }
.class-rule-section li { margin: .5rem 0; line-height: 1.55; }
.class-rule-section li::marker { color: var(--lime); }
@media (max-width: 42rem) {
  .class-rule-summary { grid-template-columns: 1fr; }
  .class-detail-actions .btn { flex: 1 1 auto; text-align: center; }
}