/* ═══════════════════════════════════════════════════════════════
   S2S Motorsport — Shared Styles
   Each page sets --accent and --accent-light via inline <style>
   Default: brand red
   ═══════════════════════════════════════════════════════════════ */

:root {
  --accent: #D01200;
  --accent-light: #FF4422;
  --accent-rgb: 208, 18, 0;
}

* { box-sizing: border-box; }
html { font-family: 'Barlow', sans-serif; }

/* ── Grain overlay ── */
.grain::after {
  content: '';
  position: absolute;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='200' height='200'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='200' height='200' filter='url(%23n)' opacity='0.04'/%3E%3C/svg%3E");
  pointer-events: none;
  z-index: 1;
}

/* ── Nav ── */
.nav-blur {
  backdrop-filter: blur(16px) saturate(180%);
  -webkit-backdrop-filter: blur(16px) saturate(180%);
}
.nav-scrolled {
  box-shadow: 0 1px 0 rgba(255,255,255,0.06), 0 4px 24px -4px rgba(0,0,0,0.5);
}
.nav-link {
  position: relative;
  transition: color 0.2s ease;
}
.nav-link::after {
  content: '';
  position: absolute;
  bottom: -2px; left: 0;
  width: 0; height: 2px;
  background: var(--accent);
  transition: width 0.25s cubic-bezier(0.34,1.56,0.64,1);
}
.nav-link:hover::after,
.nav-link:focus-visible::after { width: 100%; }
.nav-link:hover { color: #F0F2FF; }
.nav-link:focus-visible { outline: 2px solid var(--accent); outline-offset: 4px; border-radius: 2px; }

/* ── Dropdown ── */
[data-dropdown]:hover .dropdown-panel,
[data-dropdown]:focus-within .dropdown-panel {
  opacity: 1; visibility: visible; transform: translateX(-50%) translateY(0);
}
[data-dropdown] .dropdown-panel { transform: translateX(-50%) translateY(4px); }
[data-dropdown]:hover .dropdown-chevron,
[data-dropdown]:focus-within .dropdown-chevron { transform: rotate(180deg); }
.dropdown-item:hover, .dropdown-item:focus-visible {
  background: rgba(255,255,255,0.06); color: #F0F2FF;
}
[data-mobile-dropdown] .dropdown-chevron.open { transform: rotate(180deg); }

/* ── Buttons ── */
.btn-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-light));
  color: #fff;
  font-family: 'Barlow Condensed', sans-serif;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  border: none;
  position: relative;
  overflow: hidden;
  transition: transform 0.2s cubic-bezier(0.34,1.56,0.64,1), box-shadow 0.2s ease;
  box-shadow: 0 4px 20px -4px rgba(var(--accent-rgb), 0.5);
}
.btn-primary::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255,255,255,0.15), transparent);
  opacity: 0;
  transition: opacity 0.2s ease;
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 30px -4px rgba(var(--accent-rgb), 0.65); }
.btn-primary:hover::before { opacity: 1; }
.btn-primary:active { transform: translateY(0); }
.btn-primary:focus-visible { outline: 2px solid var(--accent-light); outline-offset: 3px; }

.btn-outline {
  background: transparent;
  color: #F0F2FF;
  font-family: 'Barlow Condensed', sans-serif;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  border: 1px solid rgba(240,242,255,0.25);
  transition: border-color 0.2s ease, background 0.2s ease, transform 0.2s cubic-bezier(0.34,1.56,0.64,1);
}
.btn-outline:hover { border-color: rgba(240,242,255,0.6); background: rgba(240,242,255,0.06); transform: translateY(-2px); }
.btn-outline:active { transform: translateY(0); }
.btn-outline:focus-visible { outline: 2px solid #F0F2FF; outline-offset: 3px; }

/* ── Cards ── */
.card {
  background: linear-gradient(135deg, #10152E 0%, #0D1228 100%);
  border: 1px solid rgba(255,255,255,0.06);
  transition: transform 0.25s cubic-bezier(0.34,1.56,0.64,1), box-shadow 0.25s ease;
}
.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 16px 48px -8px rgba(0,0,0,0.7), 0 0 0 1px rgba(var(--accent-rgb), 0.2);
}

/* ── Section label ── */
.section-label {
  font-family: 'Barlow Condensed', sans-serif;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  font-size: 0.7rem;
  color: var(--accent);
}

/* ── Red/accent line ── */
.red-line, .accent-line {
  display: inline-block;
  width: 40px; height: 3px;
  background: linear-gradient(90deg, var(--accent), var(--accent-light));
  vertical-align: middle;
  margin-right: 12px;
  border-radius: 2px;
}

/* ── Mobile menu ── */
#mobile-menu { transition: opacity 0.2s ease, transform 0.2s ease; }
#mobile-menu.hidden { opacity: 0; transform: translateY(-8px); pointer-events: none; }
#mobile-menu:not(.hidden) { opacity: 1; transform: translateY(0); }

/* ── Social icon hover ── */
.social-icon {
  transition: color 0.2s ease, transform 0.2s cubic-bezier(0.34,1.56,0.64,1);
}
.social-icon:hover { transform: scale(1.15); }
.social-icon:active { transform: scale(1.05); }
.social-icon:focus-visible { outline: 2px solid currentColor; outline-offset: 4px; border-radius: 2px; }

/* ── Scroll-reveal system ── */
@keyframes reveal-up {
  from { opacity: 0; transform: translateY(24px); }
  to   { opacity: 1; transform: translateY(0); }
}
.reveal {
  opacity: 0;
  transform: translateY(24px);
}
.reveal.is-visible {
  animation: reveal-up 0.6s cubic-bezier(0.34,1.2,0.64,1) forwards;
}
.reveal-stagger .reveal:nth-child(1) { animation-delay: 0s; }
.reveal-stagger .reveal:nth-child(2) { animation-delay: 0.08s; }
.reveal-stagger .reveal:nth-child(3) { animation-delay: 0.16s; }
.reveal-stagger .reveal:nth-child(4) { animation-delay: 0.24s; }
.reveal-stagger .reveal:nth-child(5) { animation-delay: 0.32s; }
.reveal-stagger .reveal:nth-child(6) { animation-delay: 0.4s; }
.reveal-stagger .reveal:nth-child(7) { animation-delay: 0.48s; }
.reveal-stagger .reveal:nth-child(8) { animation-delay: 0.56s; }
.reveal-stagger .reveal:nth-child(9) { animation-delay: 0.64s; }
.reveal-stagger .reveal:nth-child(10) { animation-delay: 0.72s; }

/* ── Hero entrance choreography ── */
@keyframes hero-fade-up {
  from { opacity: 0; transform: translateY(24px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes hero-scale-in {
  from { opacity: 0; transform: scale(0.85); }
  to   { opacity: 1; transform: scale(1); }
}
.hero-enter {
  opacity: 0;
  animation: hero-fade-up 0.7s cubic-bezier(0.34,1.2,0.64,1) forwards;
}
.hero-enter-scale {
  opacity: 0;
  animation: hero-scale-in 0.8s cubic-bezier(0.34,1.2,0.64,1) forwards;
}
.hero-delay-1  { animation-delay: 0.1s; }
.hero-delay-2  { animation-delay: 0.25s; }
.hero-delay-3  { animation-delay: 0.4s; }
.hero-delay-4  { animation-delay: 0.55s; }
.hero-delay-5  { animation-delay: 0.7s; }
.hero-delay-6  { animation-delay: 0.85s; }
.hero-delay-7  { animation-delay: 0.95s; }
.hero-delay-8  { animation-delay: 1.05s; }
.hero-delay-9  { animation-delay: 1.15s; }
.hero-delay-10 { animation-delay: 1.25s; }

/* ── Checkered flag pattern ── */
.checkered {
  background-image:
    linear-gradient(45deg, rgba(255,255,255,0.03) 25%, transparent 25%),
    linear-gradient(-45deg, rgba(255,255,255,0.03) 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, rgba(255,255,255,0.03) 75%),
    linear-gradient(-45deg, transparent 75%, rgba(255,255,255,0.03) 75%);
  background-size: 20px 20px;
  background-position: 0 0, 0 10px, 10px -10px, -10px 0px;
}