/* style.css — Your Brain On FSD landing */

:root {
  --font-display: 'Fraunces', 'Cabinet Grotesk', Georgia, serif;
  --font-body: 'Inter Tight', 'Inter', system-ui, -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, 'SF Mono', monospace;
}

/* ------------------------------------------------------------ Layout */
.container {
  width: 100%;
  max-width: var(--content-wide);
  margin-inline: auto;
  padding-inline: clamp(var(--space-5), 4vw, var(--space-12));
}

.container-narrow {
  max-width: var(--content-default);
  margin-inline: auto;
  padding-inline: clamp(var(--space-5), 4vw, var(--space-12));
}

section {
  padding-block: clamp(var(--space-16), 9vw, var(--space-32));
  position: relative;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--color-primary);
  font-weight: 500;
  margin-bottom: var(--space-5);
}
.eyebrow::before {
  content: '';
  width: 28px;
  height: 1px;
  background: currentColor;
  opacity: 0.7;
}

/* ------------------------------------------------------------ Header / Nav */
.header {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  background: color-mix(in oklab, var(--color-bg) 78%, transparent);
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition-interactive),
              background var(--transition-interactive);
}
.header.is-scrolled {
  border-bottom-color: var(--color-divider);
}
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
  padding-block: var(--space-4);
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  color: var(--color-text);
  min-height: 44px;
}
.brand:hover { color: var(--color-primary); }
.brand-logo {
  width: 36px;
  height: 36px;
  flex-shrink: 0;
}
.brand-name {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: var(--text-base);
  letter-spacing: -0.01em;
  font-feature-settings: 'ss01';
}
.brand-name em {
  font-style: italic;
  color: var(--color-primary);
}

.nav-links {
  display: none;
  align-items: center;
  gap: var(--space-8);
}
@media (min-width: 720px) {
  .nav-links { display: flex; }
}
.nav-links a {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  text-decoration: none;
  font-weight: 500;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
}
.nav-links a:hover {
  color: var(--color-text);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.theme-toggle {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-full);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-muted);
  border: 1px solid var(--color-border);
}
.theme-toggle:hover {
  color: var(--color-primary);
  border-color: var(--color-primary);
}

/* ------------------------------------------------------------ Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  min-height: 44px;
  padding: 0 var(--space-6);
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  font-weight: 600;
  letter-spacing: -0.005em;
  text-decoration: none;
  white-space: nowrap;
  border: 1px solid transparent;
}
.btn-primary {
  background: var(--color-primary);
  color: var(--color-text-inverse);
  box-shadow: var(--shadow-glow);
}
.btn-primary:hover {
  background: var(--color-primary-hover);
  transform: translateY(-1px);
}
.btn-primary:active { transform: translateY(0); }

.btn-ghost {
  background: transparent;
  color: var(--color-text);
  border-color: var(--color-border);
}
.btn-ghost:hover {
  border-color: var(--color-text);
  background: var(--color-haze);
}

.btn-sm {
  min-height: 40px;
  padding: 0 var(--space-5);
  font-size: var(--text-xs);
}

.btn .arrow {
  transition: transform var(--transition-interactive);
}
.btn:hover .arrow { transform: translateX(3px); }

/* ------------------------------------------------------------ Hero */
.hero {
  position: relative;
  padding-block: clamp(var(--space-20), 14vw, var(--space-32));
  overflow: hidden;
  isolation: isolate;
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: -2;
  pointer-events: none;
}
.hero-bg::before {
  /* horizon glow */
  content: '';
  position: absolute;
  left: 50%;
  bottom: -20%;
  width: 110vw;
  height: 75vh;
  transform: translateX(-50%);
  background: radial-gradient(ellipse at center,
    var(--color-glow) 0%,
    transparent 60%);
  filter: blur(20px);
}
.hero-bg::after {
  /* soft moonlight */
  content: '';
  position: absolute;
  top: -10%;
  right: -10%;
  width: 60vmin;
  height: 60vmin;
  background: radial-gradient(circle,
    var(--color-haze) 0%,
    transparent 70%);
}

/* Road lane motif */
.road-lines {
  position: absolute;
  inset: auto 0 0 0;
  height: 220px;
  z-index: -1;
  opacity: 0.35;
  pointer-events: none;
  mask-image: linear-gradient(to top, black 20%, transparent 90%);
  -webkit-mask-image: linear-gradient(to top, black 20%, transparent 90%);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-12);
  align-items: end;
}
@media (min-width: 980px) {
  .hero-grid {
    grid-template-columns: 1.4fr 1fr;
    gap: var(--space-16);
  }
}

.hero-headline {
  font-family: var(--font-display);
  font-size: var(--text-hero);
  font-weight: 350;
  line-height: 0.96;
  letter-spacing: -0.025em;
  color: var(--color-text);
}
.hero-headline em {
  font-style: italic;
  font-weight: 350;
  color: var(--color-primary);
}
.hero-headline .accent-line {
  display: block;
  font-family: var(--font-body);
  font-style: normal;
  font-size: var(--text-sm);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.22em;
  color: var(--color-text-muted);
  margin-bottom: var(--space-5);
}

.hero-sub {
  margin-top: var(--space-8);
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  max-width: 56ch;
  line-height: 1.55;
}

.hero-actions {
  margin-top: var(--space-10);
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
}

/* Hero side panel — instrument cluster vibe */
.hero-panel {
  position: relative;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  background:
    linear-gradient(180deg,
      color-mix(in oklab, var(--color-surface) 92%, transparent),
      color-mix(in oklab, var(--color-surface-2) 88%, transparent));
  box-shadow: var(--shadow-md);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}
.panel-readout {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-4);
  padding-bottom: var(--space-4);
  border-bottom: 1px dashed var(--color-divider);
}
.panel-readout .label {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--color-text-faint);
}
.panel-readout .value {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  color: var(--color-primary);
  font-feature-settings: 'tnum';
}
.panel-meta {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-5);
  padding-top: var(--space-5);
}
.panel-meta dt {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--color-text-faint);
  margin-bottom: var(--space-1);
}
.panel-meta dd {
  font-size: var(--text-sm);
  color: var(--color-text);
}
.panel-tags {
  margin-top: var(--space-5);
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}
.tag {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  border: 1px solid var(--color-border);
  color: var(--color-text-muted);
  background: var(--color-haze);
}

/* ------------------------------------------------------------ Section heading */
.section-head {
  display: grid;
  gap: var(--space-4);
  margin-bottom: var(--space-12);
  max-width: 56ch;
}
.section-head h2 {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 350;
  letter-spacing: -0.02em;
  line-height: 1.05;
}
.section-head h2 em {
  font-style: italic;
  color: var(--color-primary);
  font-weight: 350;
}
.section-head p {
  color: var(--color-text-muted);
  font-size: var(--text-base);
  max-width: 60ch;
}

/* ------------------------------------------------------------ Offer */
.offer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: var(--space-5);
}
.offer-card {
  padding: var(--space-6);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  position: relative;
  overflow: hidden;
}
.offer-card::after {
  content: '';
  position: absolute;
  inset: auto 0 0 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--color-primary), transparent);
  opacity: 0;
  transition: opacity var(--transition-interactive);
}
.offer-card:hover::after { opacity: 1; }
.offer-card .num {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  letter-spacing: 0.18em;
  margin-bottom: var(--space-4);
}
.offer-card h3 {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 400;
  margin-bottom: var(--space-3);
  letter-spacing: -0.01em;
}
.offer-card p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* ------------------------------------------------------------ Modes */
.modes {
  background: linear-gradient(180deg, transparent, var(--color-surface) 30%, var(--color-surface) 70%, transparent);
}
.modes-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--space-4);
}
.mode {
  padding: var(--space-6);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  background: var(--color-surface-2);
  display: grid;
  gap: var(--space-3);
}
.mode-icon {
  width: 36px;
  height: 36px;
  color: var(--color-primary);
}
.mode h3 {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: var(--text-lg);
  letter-spacing: -0.01em;
}
.mode .pair {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.12em;
  color: var(--color-text-faint);
  text-transform: uppercase;
}
.mode p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

/* ------------------------------------------------------------ Collections */
.collections-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: var(--space-4);
}
.collection {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  min-height: 240px;
  padding: var(--space-6);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  text-decoration: none;
  color: var(--color-text);
  background: var(--color-surface);
  overflow: hidden;
  isolation: isolate;
}
.collection::before {
  content: '';
  position: absolute;
  inset: 0;
  z-index: -1;
  opacity: 0.55;
  transition: opacity var(--transition-interactive), transform var(--transition-interactive);
}
.collection:hover::before { opacity: 0.85; transform: scale(1.04); }
.collection:hover { border-color: var(--color-primary); }

.collection .scene-svg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  opacity: 0.85;
  transition: transform var(--transition-interactive);
}
.collection:hover .scene-svg { transform: scale(1.04); }

.collection h3 {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: var(--text-xl);
  letter-spacing: -0.015em;
  position: relative;
  z-index: 1;
}
.collection .meta {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  position: relative;
  z-index: 1;
}
.collection .arrow-link {
  position: relative;
  z-index: 1;
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-primary);
  margin-top: var(--space-4);
}
.collection:hover .arrow-link svg { transform: translateX(3px); }
.collection .arrow-link svg { transition: transform var(--transition-interactive); }

/* ------------------------------------------------------------ Latest drives */
.drives-list {
  display: grid;
  gap: var(--space-3);
  list-style: none;
}
.drive {
  position: relative;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: var(--space-5);
  padding: var(--space-5) var(--space-6);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  text-decoration: none;
  color: var(--color-text);
  transition: border-color var(--transition-interactive),
              background var(--transition-interactive),
              transform var(--transition-interactive);
}
.drive:hover {
  border-color: var(--color-primary);
  background: var(--color-surface-2);
  transform: translateX(4px);
}
.drive-num {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.16em;
  color: var(--color-text-faint);
  font-variant-numeric: tabular-nums;
}
.drive-title {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: var(--text-lg);
  letter-spacing: -0.01em;
  line-height: 1.25;
}
.drive-tags {
  display: flex;
  gap: var(--space-2);
  flex-wrap: wrap;
  margin-top: var(--space-2);
}
.drive-tags span {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-text-muted);
}
.drive-arrow {
  color: var(--color-text-faint);
  transition: color var(--transition-interactive), transform var(--transition-interactive);
  flex-shrink: 0;
}
.drive:hover .drive-arrow {
  color: var(--color-primary);
  transform: translateX(3px);
}
@media (max-width: 640px) {
  .drive {
    grid-template-columns: auto 1fr;
    gap: var(--space-4);
    padding: var(--space-4) var(--space-5);
  }
  .drive-arrow { display: none; }
}

/* ------------------------------------------------------------ Why it works */
.why {
  position: relative;
}
.why-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-12);
  align-items: start;
}
@media (min-width: 880px) {
  .why-grid { grid-template-columns: 1fr 1fr; gap: var(--space-16); }
}
.why-points {
  display: grid;
  gap: var(--space-6);
  list-style: none;
}
.why-point {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: var(--space-5);
  padding-bottom: var(--space-6);
  border-bottom: 1px dashed var(--color-divider);
}
.why-point:last-child { border-bottom: none; padding-bottom: 0; }
.why-point .idx {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.18em;
  color: var(--color-primary);
  padding-top: 4px;
}
.why-point h3 {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 400;
  margin-bottom: var(--space-2);
  letter-spacing: -0.01em;
}
.why-point p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.65;
}
.why-quote {
  position: sticky;
  top: 100px;
  padding: var(--space-8);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  background: var(--color-surface);
}
.why-quote blockquote {
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 350;
  font-size: var(--text-xl);
  line-height: 1.3;
  letter-spacing: -0.015em;
  color: var(--color-text);
}
.why-quote blockquote::before {
  content: '“';
  display: block;
  font-size: 4rem;
  line-height: 0.8;
  color: var(--color-primary);
  margin-bottom: var(--space-3);
}
.why-quote cite {
  display: block;
  margin-top: var(--space-5);
  font-style: normal;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-text-faint);
}

/* ------------------------------------------------------------ Final CTA */
.cta {
  position: relative;
  overflow: hidden;
  isolation: isolate;
}
.cta-card {
  position: relative;
  padding: clamp(var(--space-12), 8vw, var(--space-24));
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-border);
  background:
    radial-gradient(ellipse at top, var(--color-glow), transparent 60%),
    var(--color-surface);
  text-align: center;
  overflow: hidden;
  isolation: isolate;
}
.cta-card .road-lines {
  position: absolute;
  inset: 0;
  height: 100%;
  opacity: 0.3;
  z-index: -1;
}
.cta-card h2 {
  font-family: var(--font-display);
  font-weight: 350;
  font-size: var(--text-2xl);
  letter-spacing: -0.02em;
  line-height: 1.05;
  max-width: 18ch;
  margin-inline: auto;
}
.cta-card h2 em {
  font-style: italic;
  color: var(--color-primary);
  font-weight: 350;
}
.cta-card p {
  margin: var(--space-6) auto 0;
  font-size: var(--text-base);
  color: var(--color-text-muted);
  max-width: 50ch;
}
.cta-card .actions {
  margin-top: var(--space-10);
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-3);
}

/* ------------------------------------------------------------ Footer */
.footer {
  border-top: 1px solid var(--color-divider);
  padding-block: var(--space-12);
  margin-top: var(--space-16);
}
.footer-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-8);
  align-items: start;
}
@media (min-width: 720px) {
  .footer-row {
    grid-template-columns: 1.4fr auto;
    align-items: end;
  }
}
.footer-brand {
  display: grid;
  gap: var(--space-3);
  max-width: 50ch;
}
.footer-brand p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}
.footer-meta {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--color-text-faint);
  display: grid;
  gap: var(--space-2);
  text-align: left;
}
@media (min-width: 720px) {
  .footer-meta { text-align: right; }
}
.footer-meta a {
  color: inherit;
  text-decoration: none;
}
.footer-meta a:hover { color: var(--color-primary); }

/* ------------------------------------------------------------ Misc accents */
.divider-dot {
  display: inline-block;
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: currentColor;
  opacity: 0.4;
  margin-inline: var(--space-2);
  vertical-align: middle;
}

@media (prefers-reduced-motion: no-preference) {
  .fade-up {
    opacity: 0;
    transform: translateY(16px);
    transition: opacity 800ms ease, transform 800ms cubic-bezier(0.16, 1, 0.3, 1);
  }
  .fade-up.in {
    opacity: 1;
    transform: translateY(0);
  }
}