/* ================================================================
   APEX KARTING — Ultra Pro Design System
   ================================================================ */

:root {
  --red:       #e63b2e;
  --red-dark:  #b52e23;
  --orange:    #ff6b00;
  --gold:      #f5c518;
  --bg:        #080808;
  --bg2:       #0e0e0e;
  --bg3:       #141414;
  --surface:   #1a1a1a;
  --border:    #222222;
  --text:      #f0f0f0;
  --muted:     #666666;
  --font-head: 'Bebas Neue', sans-serif;
  --font-body: 'Inter', sans-serif;
  --ease:      cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in:   cubic-bezier(0.4, 0, 1, 1);
}

/* ── RESET ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html {
  scroll-behavior: smooth;
  /* Base fluide : 14px @1280px → 16px @1920px → 18px @2560px */
  font-size: clamp(14px, 0.833vw + 3.33px, 18px);
}
body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  overflow-x: hidden;
  cursor: none;
}
a { text-decoration: none; color: inherit; }
ul { list-style: none; }
img { display: block; max-width: 100%; }
input, select, textarea, button { font-family: inherit; }

/* ── SCROLLBAR ── */
::-webkit-scrollbar { width: 4px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--red); border-radius: 2px; }

/* ── SELECTION ── */
::selection { background: var(--red); color: #fff; }

/* ── CUSTOM CURSOR ── */
.cursor {
  position: fixed; top: 0; left: 0; z-index: 9999;
  width: 12px; height: 12px;
  background: var(--red);
  border-radius: 50%;
  pointer-events: none;
  transform: translate(-50%, -50%);
  transition: transform 0.08s var(--ease), background 0.2s;
  mix-blend-mode: difference;
}
.cursor-trail {
  position: fixed; top: 0; left: 0; z-index: 9998;
  width: 36px; height: 36px;
  border: 1.5px solid rgba(230, 59, 46, 0.4);
  border-radius: 50%;
  pointer-events: none;
  transform: translate(-50%, -50%);
  transition: transform 0.22s var(--ease);
}
body:has(a:hover) .cursor,
body:has(button:hover) .cursor { transform: translate(-50%, -50%) scale(2.5); }
body:has(a:hover) .cursor-trail,
body:has(button:hover) .cursor-trail { transform: translate(-50%, -50%) scale(0.5); opacity: 0; }

/* ── LAYOUT ── */
.container { max-width: 1200px; margin: 0 auto; padding: 0 clamp(1rem, 4vw, 3rem); }

/* ── BUTTONS ── */
.btn-primary {
  display: inline-flex; align-items: center; gap: 8px;
  padding: clamp(11px, 1.2vh, 14px) clamp(20px, 1.8vw, 28px);
  background: var(--red);
  color: #fff;
  font-weight: 600; font-size: clamp(0.8rem, 0.85vw, 0.9rem);
  letter-spacing: 0.04em;
  border: none; border-radius: 4px;
  cursor: none;
  position: relative;
  overflow: hidden;
  transition: transform 0.25s var(--ease), box-shadow 0.25s var(--ease);
}
.btn-primary::before {
  content: '';
  position: absolute; inset: 0;
  background: linear-gradient(90deg, transparent 0%, rgba(255,255,255,0.15) 50%, transparent 100%);
  transform: translateX(-100%);
  transition: transform 0.5s var(--ease);
}
.btn-primary:hover::before { transform: translateX(100%); }
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 40px rgba(230, 59, 46, 0.4);
}
.btn-primary.full { width: 100%; justify-content: center; }

.btn-ghost {
  display: inline-flex; align-items: center;
  padding: clamp(11px, 1.2vh, 14px) clamp(20px, 1.8vw, 28px);
  color: var(--text);
  font-weight: 500; font-size: clamp(0.8rem, 0.85vw, 0.9rem);
  letter-spacing: 0.04em;
  border: 1.5px solid rgba(255,255,255,0.12);
  border-radius: 4px;
  cursor: none;
  transition: border-color 0.25s, color 0.25s, background 0.25s;
}
.btn-ghost:hover { border-color: var(--red); color: var(--red); background: rgba(230,59,46,0.06); }

.btn-outline {
  display: inline-flex; align-items: center; justify-content: center;
  width: 100%; padding: 14px;
  color: var(--text);
  font-weight: 600; font-size: 0.9rem;
  border: 1.5px solid var(--border);
  border-radius: 4px;
  cursor: none;
  transition: border-color 0.25s, color 0.25s, background 0.25s;
}
.btn-outline:hover { border-color: var(--red); color: var(--red); }

/* ── SECTION LABELS ── */
.section-label {
  font-size: clamp(0.65rem, 0.7vw, 0.75rem);
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--red);
  margin-bottom: 0.8rem;
}
.section-title {
  font-family: var(--font-head);
  font-size: clamp(1.8rem, 3.2vw, 3.4rem);
  line-height: 1;
  letter-spacing: 0.02em;
  margin-bottom: 1.2rem;
}
.section-body {
  color: var(--muted);
  font-size: clamp(0.85rem, 0.9vw, 1rem);
  line-height: 1.7;
  max-width: 480px;
}
.section-header { text-align: center; margin-bottom: 4rem; }
.section-header .section-body { margin: 0 auto; }

/* ================================================================
   NAVIGATION
   ================================================================ */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  display: flex; align-items: center; justify-content: space-between;
  padding: clamp(0.8rem, 1.2vh, 1.2rem) clamp(1.2rem, 2.5vw, 3rem);
  transition: background 0.4s var(--ease), backdrop-filter 0.4s, padding 0.3s;
}
.nav.scrolled {
  background: rgba(8, 8, 8, 0.9);
  backdrop-filter: blur(20px);
  padding: clamp(0.6rem, 0.9vh, 0.9rem) clamp(1.2rem, 2.5vw, 3rem);
  border-bottom: 1px solid var(--border);
}
.nav-logo {
  display: flex; align-items: center; gap: 10px;
  font-family: var(--font-head);
  font-size: clamp(1.2rem, 1.4vw, 1.6rem);
  letter-spacing: 0.08em;
  color: var(--text);
}
.logo-icon { color: var(--red); font-size: 1.2rem; }
.nav-links {
  display: flex; gap: clamp(1.2rem, 2vw, 2.5rem);
}
.nav-links a {
  font-size: clamp(0.68rem, 0.7vw, 0.8rem);
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
  transition: color 0.2s;
  position: relative;
}
.nav-links a::after {
  content: '';
  position: absolute; bottom: -4px; left: 0; right: 0;
  height: 1.5px;
  background: var(--red);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s var(--ease);
}
.nav-links a:hover { color: var(--text); }
.nav-links a:hover::after { transform: scaleX(1); }
.nav-cta {
  padding: clamp(8px, 1vh, 10px) clamp(14px, 1.4vw, 22px);
  background: var(--red);
  color: #fff;
  font-size: clamp(0.68rem, 0.7vw, 0.8rem);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  border-radius: 3px;
  transition: background 0.2s, box-shadow 0.2s;
}
.nav-cta:hover { background: var(--red-dark); box-shadow: 0 4px 20px rgba(230,59,46,0.4); }

.burger {
  display: none;
  flex-direction: column; gap: 5px;
  background: none; border: none; cursor: none; padding: 4px;
}
.burger span {
  display: block; width: 24px; height: 2px;
  background: var(--text);
  transition: transform 0.3s, opacity 0.3s;
}

/* ================================================================
   HERO
   ================================================================ */
.hero {
  position: relative;
  height: 100vh; min-height: 600px;
  display: flex; align-items: center; justify-content: center;
  overflow: hidden;
}

.hero-parallax-bg {
  position: absolute; inset: -20%;
  background:
    radial-gradient(ellipse 80% 60% at 60% 40%, rgba(230,59,46,0.12) 0%, transparent 60%),
    radial-gradient(ellipse 60% 40% at 80% 80%, rgba(255,107,0,0.06) 0%, transparent 50%),
    linear-gradient(135deg, #080808 0%, #0f0a0a 100%);
  will-change: transform;
}

.hero-grid-overlay {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.02) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, black, transparent);
}

.speed-lines {
  position: absolute; inset: 0;
  overflow: hidden;
  pointer-events: none;
}
.speed-line {
  position: absolute;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(230,59,46,0.5), transparent);
  animation: speedLine 1.5s linear infinite;
  opacity: 0;
}
@keyframes speedLine {
  0%   { transform: translateX(-100%); opacity: 0; }
  10%  { opacity: 1; }
  90%  { opacity: 1; }
  100% { transform: translateX(100vw); opacity: 0; }
}

.hero-content {
  position: relative; z-index: 2;
  text-align: center;
  padding: 0 1rem;
}

.hero-badge {
  display: inline-flex; align-items: center; gap: 8px;
  padding: clamp(4px, 0.6vh, 6px) clamp(10px, 1.2vw, 16px);
  background: rgba(230,59,46,0.1);
  border: 1px solid rgba(230,59,46,0.25);
  border-radius: 100px;
  font-size: clamp(0.65rem, 0.75vw, 0.75rem);
  font-weight: 500;
  letter-spacing: 0.08em;
  color: #ff8a7a;
  margin-bottom: clamp(1rem, 2.5vh, 2rem);
}
.badge-dot {
  width: 6px; height: 6px;
  background: var(--red);
  border-radius: 50%;
  animation: pulse 2s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50%       { opacity: 0.5; transform: scale(1.4); }
}

.hero-title {
  font-family: var(--font-head);
  /* Tient compte de la largeur ET de la hauteur du viewport */
  font-size: clamp(3.5rem, min(11vw, 17vh), 10rem);
  line-height: 0.88;
  letter-spacing: -0.01em;
  margin-bottom: clamp(1rem, 2.5vh, 1.8rem);
}
.title-line { display: block; }
.title-line.accent { color: var(--red); -webkit-text-stroke: 0; }
.title-line:not(.accent) {
  -webkit-text-stroke: 1.5px rgba(255,255,255,0.15);
  color: transparent;
}

.hero-sub {
  font-size: clamp(0.82rem, 1vw, 1rem);
  color: var(--muted);
  max-width: 520px;
  margin: 0 auto clamp(1.2rem, 2.5vh, 2.5rem);
  line-height: 1.6;
}

.hero-actions {
  display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap;
}

/* Ticker */
.hero-ticker {
  position: absolute; bottom: clamp(60px, 8vh, 80px); left: 0; right: 0;
  overflow: hidden;
  border-top: 1px solid rgba(255,255,255,0.05);
  border-bottom: 1px solid rgba(255,255,255,0.05);
  padding: 10px 0;
  background: rgba(230,59,46,0.04);
}
.ticker-track {
  display: flex; gap: 2rem;
  white-space: nowrap;
  animation: ticker 18s linear infinite;
  font-family: var(--font-head);
  font-size: clamp(0.72rem, 0.8vw, 0.85rem);
  letter-spacing: 0.15em;
  color: var(--muted);
}
.ticker-track .sep { color: var(--red); }
@keyframes ticker { from { transform: translateX(0); } to { transform: translateX(-50%); } }

/* Scroll indicator */
.scroll-indicator {
  position: absolute; bottom: clamp(1rem, 2vh, 2rem); left: 50%; transform: translateX(-50%);
  display: flex; flex-direction: column; align-items: center; gap: 8px;
  font-size: 0.62rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  color: var(--muted);
  z-index: 2;
}
.scroll-line {
  width: 1px; height: 40px;
  background: linear-gradient(to bottom, var(--red), transparent);
  animation: scrollBob 1.8s ease-in-out infinite;
}
@keyframes scrollBob {
  0%, 100% { opacity: 1; transform: scaleY(1); }
  50%       { opacity: 0.3; transform: scaleY(0.6); }
}

/* ================================================================
   ABOUT
   ================================================================ */
.about {
  padding: clamp(4rem, 8vh, 8rem) 0;
  background: var(--bg2);
  position: relative;
}
.about::before {
  content: '';
  position: absolute; top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border), transparent);
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(2.5rem, 5vw, 6rem);
  align-items: center;
}

.track-diagram {
  position: relative;
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
  padding: 2rem;
}
.track-diagram::before {
  content: 'CIRCUIT MAP';
  position: absolute; top: 1rem; left: 50%; transform: translateX(-50%);
  font-size: 0.65rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  color: var(--muted);
}
.track-svg { width: 100%; height: auto; }
.track-line-anim {
  stroke-dashoffset: 0;
  animation: dashFlow 6s linear infinite;
}
@keyframes dashFlow {
  from { stroke-dashoffset: 0; }
  to   { stroke-dashoffset: -280; }
}

.about-tags {
  display: flex; gap: 0.6rem; margin-top: 1rem; flex-wrap: wrap;
}
.tag {
  padding: 5px 12px;
  background: rgba(230,59,46,0.08);
  border: 1px solid rgba(230,59,46,0.2);
  border-radius: 100px;
  font-size: 0.75rem;
  font-weight: 500;
  color: #ff8a7a;
}

.features-list { display: flex; flex-direction: column; gap: 1.5rem; margin-top: 2rem; }
.feature-item {
  display: flex; gap: 1.2rem; align-items: flex-start;
  padding: 1.2rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  transition: border-color 0.3s, transform 0.3s var(--ease);
}
.feature-item:hover {
  border-color: rgba(230,59,46,0.3);
  transform: translateX(6px);
}
.feature-icon {
  font-size: 1.4rem;
  flex-shrink: 0;
  width: 44px; height: 44px;
  display: flex; align-items: center; justify-content: center;
  background: rgba(230,59,46,0.08);
  border-radius: 8px;
}
.feature-item strong {
  display: block;
  font-size: clamp(0.82rem, 0.85vw, 0.9rem);
  font-weight: 600;
  margin-bottom: 0.3rem;
}
.feature-item p { font-size: clamp(0.75rem, 0.78vw, 0.82rem); color: var(--muted); line-height: 1.5; }

/* ================================================================
   STATS
   ================================================================ */
.stats {
  position: relative;
  padding: clamp(3.5rem, 7vh, 7rem) 0;
  overflow: hidden;
}
.stats-parallax-bg {
  position: absolute; inset: -20%;
  background:
    radial-gradient(ellipse 100% 80% at 50% 50%, rgba(230,59,46,0.08) 0%, transparent 60%),
    linear-gradient(180deg, #080808, #0e0e0e);
  will-change: transform;
}
.stats-overlay {
  position: absolute; inset: 0;
  background-image: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 2px,
    rgba(255,255,255,0.012) 2px,
    rgba(255,255,255,0.012) 4px
  );
}
.stats-grid {
  position: relative; z-index: 1;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
}
.stat-card {
  background: var(--bg2);
  padding: clamp(1.8rem, 3vh, 3rem) clamp(1rem, 2vw, 2rem);
  text-align: center;
  position: relative;
  overflow: hidden;
  transition: background 0.3s;
}
.stat-card::before {
  content: '';
  position: absolute; top: 0; left: 0; right: 0;
  height: 2px;
  background: var(--red);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s var(--ease);
}
.stat-card:hover::before { transform: scaleX(1); }
.stat-card:hover { background: var(--bg3); }
.stat-number {
  font-family: var(--font-head);
  font-size: clamp(2.2rem, 4vw, 4rem);
  line-height: 1;
  color: var(--red);
  margin-bottom: 0.6rem;
  letter-spacing: -0.02em;
}
.stat-number .unit {
  font-size: clamp(1.1rem, 2vw, 1.7rem);
  color: var(--muted);
}
.stat-label {
  font-size: clamp(0.65rem, 0.75vw, 0.78rem);
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
}

/* ================================================================
   SESSIONS
   ================================================================ */
.sessions {
  padding: clamp(4rem, 8vh, 8rem) 0;
  background: var(--bg2);
  position: relative;
}
.sessions::before {
  content: '';
  position: absolute; top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border), transparent);
}

.sessions-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.session-card {
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: clamp(1.2rem, 2vh, 2rem);
  position: relative;
  overflow: hidden;
  transition: border-color 0.3s, transform 0.3s var(--ease), box-shadow 0.3s;
}
.session-card::after {
  content: '';
  position: absolute; bottom: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--red), var(--orange));
  transform: scaleX(0);
  transition: transform 0.4s var(--ease);
}
.session-card:hover {
  border-color: rgba(230,59,46,0.25);
  transform: translateY(-6px);
  box-shadow: 0 24px 60px rgba(0,0,0,0.4);
}
.session-card:hover::after { transform: scaleX(1); }

.session-card.featured {
  background: linear-gradient(135deg, #1a0e0e 0%, #120808 100%);
  border-color: rgba(230,59,46,0.25);
}

.session-header {
  display: flex; justify-content: space-between; align-items: center;
  margin-bottom: 1.5rem;
}
.session-icon { font-size: 1.8rem; }
.session-badge {
  padding: 4px 10px;
  background: rgba(255,255,255,0.06);
  border: 1px solid var(--border);
  border-radius: 100px;
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--muted);
}
.session-badge.gold {
  background: rgba(245,197,24,0.1);
  border-color: rgba(245,197,24,0.25);
  color: var(--gold);
}
.session-card h3 {
  font-family: var(--font-head);
  font-size: clamp(1.5rem, 1.8vw, 2rem);
  letter-spacing: 0.04em;
  margin-bottom: 0.3rem;
}
.session-duration {
  font-size: clamp(0.68rem, 0.75vw, 0.78rem);
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--red);
  margin-bottom: 1rem;
}
.session-desc {
  font-size: clamp(0.78rem, 0.85vw, 0.88rem);
  color: var(--muted);
  line-height: 1.6;
  margin-bottom: 1.5rem;
}
.session-features {
  display: flex; flex-direction: column; gap: 0.5rem;
}
.session-features li {
  font-size: clamp(0.72rem, 0.78vw, 0.82rem);
  color: var(--muted);
  padding-left: 1.2rem;
  position: relative;
}
.session-features li::before {
  content: '✓';
  position: absolute; left: 0;
  color: var(--red);
  font-weight: 700;
}

/* ================================================================
   PRICING
   ================================================================ */
.pricing {
  padding: clamp(4rem, 8vh, 8rem) 0;
  background: var(--bg);
}
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
}
.pricing-card {
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: clamp(1.2rem, 2vh, 2rem) clamp(1rem, 1.5vw, 1.5rem);
  display: flex; flex-direction: column;
  gap: 1.5rem;
  position: relative;
  overflow: hidden;
  transition: border-color 0.3s, transform 0.3s var(--ease);
}
.pricing-card:hover {
  border-color: rgba(230,59,46,0.2);
  transform: translateY(-4px);
}
.pricing-card.highlight {
  background: linear-gradient(135deg, #1c0d0d 0%, #130909 100%);
  border-color: rgba(230,59,46,0.3);
}
.pricing-card.group { grid-column: span 1; }

.pricing-ribbon {
  position: absolute; top: 0; right: 0;
  padding: 6px 16px;
  background: var(--red);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  border-bottom-left-radius: 8px;
}
.pricing-top h3 {
  font-family: var(--font-head);
  font-size: clamp(1.2rem, 1.5vw, 1.6rem);
  letter-spacing: 0.04em;
  margin-bottom: 0.8rem;
}
.price {
  display: flex; align-items: baseline; gap: 2px;
  margin-bottom: 0.4rem;
}
.amount {
  font-family: var(--font-head);
  font-size: clamp(2.2rem, 3vw, 3.5rem);
  line-height: 1;
  color: var(--red);
  letter-spacing: -0.02em;
}
.currency {
  font-family: var(--font-head);
  font-size: clamp(1rem, 1.3vw, 1.5rem);
  color: var(--muted);
}
.currency.small { font-size: clamp(0.85rem, 1vw, 1.1rem); }
.pricing-top > p {
  font-size: clamp(0.7rem, 0.75vw, 0.78rem);
  color: var(--muted);
}

/* ================================================================
   RACE BANNER
   ================================================================ */
.race-banner {
  background: var(--red);
  overflow: hidden;
  padding: 14px 0;
}
.race-track { overflow: hidden; }
.race-inner {
  display: flex; gap: 2.5rem;
  white-space: nowrap;
  animation: raceTicker 14s linear infinite;
  font-family: var(--font-head);
  font-size: clamp(0.75rem, 0.9vw, 1rem);
  letter-spacing: 0.18em;
  color: rgba(255,255,255,0.9);
}
.race-inner .flag { font-size: 1rem; }
@keyframes raceTicker {
  from { transform: translateX(0); }
  to   { transform: translateX(-50%); }
}

/* ================================================================
   CONTACT
   ================================================================ */
.contact {
  padding: clamp(4rem, 8vh, 8rem) 0;
  background: var(--bg2);
  position: relative;
}
.contact::before {
  content: '';
  position: absolute; top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border), transparent);
}
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: clamp(2rem, 5vw, 6rem);
  align-items: start;
}
.contact-details {
  display: flex; flex-direction: column; gap: 1rem;
  margin-top: 2rem;
}
.contact-item {
  display: flex; align-items: center; gap: 1rem;
  font-size: clamp(0.8rem, 0.88vw, 0.9rem);
  color: var(--muted);
}
.c-icon {
  width: 38px; height: 38px;
  display: flex; align-items: center; justify-content: center;
  background: rgba(230,59,46,0.08);
  border: 1px solid rgba(230,59,46,0.15);
  border-radius: 8px;
  font-size: 1rem;
  flex-shrink: 0;
}

/* Form */
.contact-form {
  display: flex; flex-direction: column; gap: clamp(0.8rem, 1.2vh, 1.2rem);
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: clamp(1.5rem, 2.5vh, 2.5rem);
}
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.form-group { display: flex; flex-direction: column; gap: 0.4rem; }
.form-group label {
  font-size: clamp(0.65rem, 0.72vw, 0.75rem);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}
.form-group input,
.form-group select,
.form-group textarea {
  padding: clamp(9px, 1.1vh, 12px) clamp(10px, 1.2vw, 14px);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  font-size: clamp(0.8rem, 0.88vw, 0.9rem);
  transition: border-color 0.2s, box-shadow 0.2s;
  outline: none;
  appearance: none;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--red);
  box-shadow: 0 0 0 3px rgba(230,59,46,0.1);
}
.form-group textarea { resize: vertical; min-height: 100px; }
.form-group select { cursor: none; }
.form-group input::placeholder,
.form-group textarea::placeholder { color: #333; }

/* ================================================================
   FOOTER
   ================================================================ */
.footer {
  background: var(--bg);
  border-top: 1px solid var(--border);
  padding: 3rem 0;
}
.footer-inner {
  display: flex; flex-direction: column; align-items: center;
  gap: 1rem; text-align: center;
}
.footer-logo {
  display: flex; align-items: center; gap: 8px;
  font-family: var(--font-head);
  font-size: 1.4rem;
  letter-spacing: 0.1em;
}
.footer-tagline {
  font-size: 0.8rem; color: var(--muted);
  letter-spacing: 0.1em;
}
.footer-links {
  display: flex; gap: 2rem;
}
.footer-links a {
  font-size: 0.78rem;
  color: var(--muted);
  transition: color 0.2s;
}
.footer-links a:hover { color: var(--red); }
.footer-copy { font-size: 0.72rem; color: #333; }

/* ================================================================
   ANIMATIONS — INTERSECTION OBSERVER
   ================================================================ */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.8s var(--ease), transform 0.8s var(--ease);
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}
.reveal-left {
  opacity: 0;
  transform: translateX(-50px);
  transition: opacity 0.8s var(--ease), transform 0.8s var(--ease);
}
.reveal-left.visible { opacity: 1; transform: translateX(0); }
.reveal-right {
  opacity: 0;
  transform: translateX(50px);
  transition: opacity 0.8s var(--ease), transform 0.8s var(--ease);
}
.reveal-right.visible { opacity: 1; transform: translateX(0); }

/* stagger delays */
.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }

/* ================================================================
   RESPONSIVE
   ================================================================ */

/* ── 1440px : laptop standard ── */
@media (max-width: 1440px) {
  .sessions-grid { gap: 1rem; }
  .pricing-grid  { gap: 0.8rem; }
}

/* ── 1280px : laptop 1080p petit écran ── */
@media (max-width: 1280px) {
  .pricing-grid { grid-template-columns: repeat(2, 1fr); }
  .pricing-card.group { grid-column: span 1; }
}

/* ── 1100px ── */
@media (max-width: 1100px) {
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .about-grid { gap: clamp(2rem, 4vw, 4rem); }
}

/* ── 900px : tablette paysage ── */
@media (max-width: 900px) {
  .about-grid       { grid-template-columns: 1fr; gap: 2.5rem; }
  .sessions-grid    { grid-template-columns: 1fr; max-width: 500px; margin: 0 auto; }
  .contact-grid     { grid-template-columns: 1fr; gap: 2.5rem; }
  .nav-links, .nav-cta { display: none; }
  .burger           { display: flex; }
}

/* ── 640px : mobile ── */
@media (max-width: 640px) {
  .container        { padding: 0 1rem; }
  .hero-title       { font-size: clamp(3rem, min(14vw, 14vh), 6rem); }
  .pricing-grid     { grid-template-columns: 1fr; max-width: 360px; margin: 0 auto; }
  .stats-grid       { grid-template-columns: 1fr 1fr; }
  .form-row         { grid-template-columns: 1fr; }
  .section-header   { margin-bottom: 2.5rem; }
}

/* ── 420px : petits mobiles ── */
@media (max-width: 420px) {
  .hero-actions     { flex-direction: column; align-items: center; }
  .hero-badge       { font-size: 0.62rem; }
  .stats-grid       { grid-template-columns: 1fr 1fr; }
}

/* ── Très grands écrans (4K+) ── */
@media (min-width: 2560px) {
  .container        { max-width: 1600px; }
  html              { font-size: 20px; }
}

/* ================================================================
   NOISE TEXTURE OVERLAY
   ================================================================ */
body::after {
  content: '';
  position: fixed; inset: 0; z-index: 9000;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)' opacity='0.04'/%3E%3C/svg%3E");
  opacity: 0.025;
  pointer-events: none;
}