/* =============================================
   MASTER 272 — Core Stylesheet
   Dark Theme · Glassmorphism · Premium
   ============================================= */

:root {
  --bg-primary: #0a0e17;
  --bg-secondary: #0f1419;
  --bg-card: rgba(20, 27, 36, 0.6);
  --blue: #1e88e5;
  --blue-light: #4da3ff;
  --blue-glow: rgba(30, 136, 229, 0.3);
  --red: #e63946;
  --red-glow: rgba(230, 57, 70, 0.25);
  --gold: #d4af37;
  --cyan: #00d4ff;
  --text-primary: #e8eaed;
  --text-secondary: #9ca3af;
  --text-muted: #6b7280;
  --border: rgba(255, 255, 255, 0.08);
  --border-light: rgba(255, 255, 255, 0.12);
  --glass-bg: rgba(20, 27, 36, 0.5);
  --glass-border: rgba(255, 255, 255, 0.08);
  --glass-blur: 20px;
  --container-width: 1200px;
  --ease: cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --font-display: 'Crimson Pro', Georgia, serif;
  --font-body: 'DM Sans', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
}

*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-body);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.65;
  overflow-x: hidden;
}

a { color: var(--blue-light); text-decoration: none; transition: color 0.3s var(--ease); }
a:hover { color: var(--text-primary); }
img { max-width: 100%; display: block; }
::selection { background: var(--blue); color: #fff; }

.container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 2rem;
}

/* Glass */
.glass {
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border: 1px solid var(--glass-border);
  border-radius: 16px;
}

/* Typography */
h1, h2, h3, h4 { font-family: var(--font-display); font-weight: 500; line-height: 1.2; }
h1 { font-size: clamp(2.5rem, 5vw, 4.5rem); }
h2 { font-size: clamp(1.8rem, 3.5vw, 2.8rem); }
h3 { font-size: 1.25rem; font-weight: 600; }

.section-title { text-align: center; margin-bottom: 1rem; letter-spacing: -0.02em; }
.section-intro { text-align: center; color: var(--text-secondary); max-width: 700px; margin: 0 auto 3rem; font-size: 1.05rem; }

.tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--blue-light);
  background: rgba(30, 136, 229, 0.1);
  border: 1px solid rgba(30, 136, 229, 0.2);
  padding: 0.35rem 1rem;
  border-radius: 100px;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 600;
  padding: 0.85rem 2rem;
  border-radius: 12px;
  cursor: pointer;
  transition: all 0.3s var(--ease);
  border: none;
  text-decoration: none;
  white-space: nowrap;
}
.btn--primary {
  background: var(--blue);
  color: #fff;
  box-shadow: 0 0 0 0 var(--blue-glow);
}
.btn--primary:hover {
  background: #2196f3;
  color: #fff;
  box-shadow: 0 0 30px 0 var(--blue-glow);
  transform: translateY(-2px);
}
.btn--outline {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border-light);
}
.btn--outline:hover {
  color: #fff;
  border-color: rgba(255,255,255,0.3);
  box-shadow: 0 0 20px 0 rgba(255,255,255,0.05);
  transform: translateY(-2px);
}
.btn--lg { padding: 1rem 2.5rem; font-size: 1.05rem; }
.btn--arrow svg { transition: transform 0.3s var(--ease); }
.btn--arrow:hover svg { transform: translateX(5px); }

.section { padding: 7rem 0; position: relative; }

/* ===== HEADER ===== */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  padding: 1rem 0;
  transition: all 0.4s var(--ease);
}
.site-header.scrolled {
  background: rgba(10, 14, 23, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  padding: 0.7rem 0;
}
.header-inner {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 2rem;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 1rem;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.logo {
  display: flex;
  align-items: baseline;
  gap: 0.4rem;
  text-decoration: none;
  transition: opacity 0.3s;
}
.logo:hover { opacity: 0.8; color: var(--text-primary); }
.logo-text {
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 400;
  color: var(--text-primary);
  letter-spacing: -0.01em;
}
.logo-number {
  font-family: var(--font-mono);
  font-size: 1.4rem;
  font-weight: 500;
  color: var(--blue-light);
}

.main-nav { display: flex; gap: 2.5rem; justify-content: center; }
.nav-link {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  text-decoration: none;
  letter-spacing: 0.01em;
  position: relative;
  padding: 0.3rem 0;
  transition: color 0.3s var(--ease);
}
.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0;
  width: 0;
  height: 1.5px;
  background: var(--blue-light);
  transition: width 0.3s var(--ease);
}
.nav-link:hover, .nav-link.active { color: var(--text-primary); }
.nav-link:hover::after, .nav-link.active::after { width: 100%; }

.btn-espace-eleves {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.85rem;
  font-weight: 600;
  color: #fff;
  background: var(--blue);
  padding: 0.5rem 1.2rem;
  border-radius: 10px;
  text-decoration: none;
  transition: all 0.3s var(--ease);
}
.btn-espace-eleves:hover {
  color: #fff;
  box-shadow: 0 0 20px var(--blue-glow);
  transform: translateY(-1px);
}

.burger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 5px;
  z-index: 1001;
}
.burger span {
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: all 0.3s var(--ease);
  transform-origin: center;
}
.burger.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.burger.active span:nth-child(2) { opacity: 0; }
.burger.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

.mobile-menu {
  display: none;
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(10, 14, 23, 0.97);
  backdrop-filter: blur(30px);
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2rem;
  z-index: 999;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.4s var(--ease);
}
.mobile-menu.open { opacity: 1; pointer-events: all; }
.mobile-link {
  font-family: var(--font-display);
  font-size: 2rem;
  color: var(--text-secondary);
  text-decoration: none;
  transition: color 0.3s;
}
.mobile-link:hover { color: var(--text-primary); }
.mobile-link--accent { color: var(--blue-light); font-size: 1.3rem; font-family: var(--font-body); }

/* ===== HERO ===== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  position: relative;
  overflow: hidden;
  padding: 6rem 2rem 4rem;
}
.hero-bg { position: absolute; inset: 0; z-index: 0; overflow: hidden; }

.hero-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(100px);
  opacity: 0.35;
}
.hero-orb--1 {
  width: 600px; height: 600px;
  background: radial-gradient(circle, var(--blue) 0%, transparent 70%);
  top: -20%; right: -10%;
  animation: orbFloat 15s ease-in-out infinite;
}
.hero-orb--2 {
  width: 500px; height: 500px;
  background: radial-gradient(circle, var(--red) 0%, transparent 70%);
  bottom: -15%; left: -10%;
  animation: orbFloat 18s ease-in-out infinite reverse;
}
.hero-orb--3 {
  width: 300px; height: 300px;
  background: radial-gradient(circle, var(--cyan) 0%, transparent 70%);
  top: 40%; left: 50%;
  transform: translateX(-50%);
  opacity: 0.15;
  animation: orbFloat 12s ease-in-out infinite 3s;
}
.hero-grid {
  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 at center, black 30%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 75%);
}

@keyframes orbFloat {
  0%, 100% { transform: translate(0, 0); }
  33% { transform: translate(30px, -20px); }
  66% { transform: translate(-20px, 15px); }
}

.hero-content { position: relative; z-index: 1; max-width: 860px; }

.hero-badge {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-secondary);
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--border);
  display: inline-block;
  padding: 0.4rem 1.2rem;
  border-radius: 100px;
  margin-bottom: 2rem;
}

.hero-title {
  font-size: clamp(3rem, 7vw, 5.5rem);
  font-weight: 300;
  letter-spacing: -0.03em;
  line-height: 1.05;
  margin-bottom: 1.5rem;
}
.hero-title span { display: block; }
.hero-title--accent { color: var(--blue-light); }

.hero-subtitle {
  font-size: clamp(1rem, 2vw, 1.2rem);
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 2.5rem;
  max-width: 560px;
  margin-left: auto;
  margin-right: auto;
}

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

.scroll-indicator {
  position: absolute;
  bottom: 2.5rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 1;
}
.scroll-mouse {
  width: 26px; height: 40px;
  border: 2px solid rgba(255,255,255,0.2);
  border-radius: 14px;
  display: flex;
  justify-content: center;
  padding-top: 8px;
}
.scroll-wheel {
  width: 3px; height: 8px;
  background: rgba(255,255,255,0.4);
  border-radius: 3px;
  animation: scrollBounce 2s ease-in-out infinite;
}
@keyframes scrollBounce {
  0%, 100% { transform: translateY(0); opacity: 1; }
  50% { transform: translateY(8px); opacity: 0.2; }
}

/* ===== STATS ===== */
.section--stats { padding-top: 4rem; padding-bottom: 6rem; }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.5rem; }
.stat-card {
  padding: 2.2rem 1.5rem;
  text-align: center;
  transition: all 0.3s var(--ease);
}
.stat-card:hover {
  transform: translateY(-5px);
  border-color: rgba(77, 163, 255, 0.2);
  box-shadow: 0 10px 40px rgba(30, 136, 229, 0.1);
}
.stat-number {
  font-family: var(--font-mono);
  font-size: 3rem;
  font-weight: 500;
  color: var(--blue-light);
  line-height: 1;
}
.stat-suffix { font-family: var(--font-mono); font-size: 1.8rem; color: var(--blue-light); }
.stat-label { display: block; margin-top: 0.75rem; font-size: 0.9rem; color: var(--text-secondary); }

/* ===== PARCOURS TEASER ===== */
.section--parcours-teaser { padding: 4rem 0 7rem; }
.parcours-teaser {
  max-width: 800px;
  margin: 0 auto;
  padding: 3.5rem 3rem;
  text-align: center;
  position: relative;
  transition: all 0.4s var(--ease);
  border-radius: 20px;
  border: 1px solid rgba(77, 163, 255, 0.2);
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
}
.parcours-teaser:hover {
  transform: translateY(-8px);
  border-color: rgba(77, 163, 255, 0.35);
  box-shadow: 0 0 40px rgba(30, 136, 229, 0.12), 0 0 80px rgba(230, 57, 70, 0.06);
}
.parcours-teaser .tag { margin-bottom: 1.5rem; }
.parcours-teaser .section-title { margin-bottom: 1.5rem; }

.parcours-badges { display: flex; align-items: center; justify-content: center; gap: 0.75rem; margin-bottom: 2.5rem; flex-wrap: wrap; }
.parcours-badge { font-family: var(--font-mono); font-size: 0.8rem; color: var(--text-secondary); letter-spacing: 0.02em; }
.parcours-sep { color: var(--text-muted); }

/* ===== WHY 272 ===== */
.section--why { background: var(--bg-secondary); }
.why-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 2rem; margin-top: 3rem; }
.why-item { text-align: center; padding: 1.5rem; transition: all 0.3s var(--ease); }
.why-item:hover .why-icon { transform: scale(1.1); }
.why-item:hover h3 { color: var(--blue-light); }
.why-icon {
  font-size: 2.5rem;
  width: 70px; height: 70px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1.2rem;
  background: rgba(30, 136, 229, 0.08);
  border-radius: 50%;
  transition: transform 0.3s var(--ease);
}
.why-item h3 { font-family: var(--font-body); font-size: 1.05rem; font-weight: 600; margin-bottom: 0.5rem; transition: color 0.3s var(--ease); }
.why-item p { font-size: 0.9rem; color: var(--text-secondary); }

/* ===== TESTIMONIAL ===== */
.section--testimonial { padding: 6rem 0 7rem; }
.testimonial-card { max-width: 800px; margin: 0 auto; padding: 3rem; position: relative; }
.quote-icon { position: absolute; top: 1.5rem; left: 2rem; color: var(--blue-light); }
.testimonial-quote p {
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 400;
  font-style: italic;
  line-height: 1.6;
  color: var(--text-primary);
  margin-bottom: 2rem;
  padding-left: 0.5rem;
}
.testimonial-author { display: flex; align-items: center; gap: 1rem; }
.testimonial-avatar {
  width: 50px; height: 50px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--blue), var(--red));
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 600;
  color: #fff;
  flex-shrink: 0;
}
.testimonial-info { display: flex; flex-direction: column; gap: 0.15rem; }
.testimonial-info strong { font-size: 1rem; color: var(--text-primary); }
.testimonial-info span { font-size: 0.85rem; color: var(--text-secondary); }
.testimonial-promo { font-family: var(--font-mono); font-size: 0.75rem !important; color: var(--text-muted) !important; }

/* ===== CTA FINAL ===== */
.section--cta-final { padding: 8rem 0; position: relative; overflow: hidden; }
.cta-final-bg { position: absolute; inset: 0; z-index: 0; }
.cta-final-content { position: relative; z-index: 1; text-align: center; }
.cta-final-title { font-size: clamp(2rem, 4vw, 3.5rem); font-weight: 300; letter-spacing: -0.02em; margin-bottom: 1rem; }
.cta-final-sub { font-size: 1.1rem; color: var(--text-secondary); margin-bottom: 2.5rem; }
.cta-final-buttons { display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap; }

/* ===== SPA Pages ===== */
.page { display: none; opacity: 0; }
.page--active { display: block; opacity: 1; }
.page-fade-in { animation: pageFadeIn 0.4s var(--ease-out) forwards; }
.page-fade-out { animation: pageFadeOut 0.25s var(--ease) forwards; }

@keyframes pageFadeIn {
  from { opacity: 0; transform: translateY(15px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes pageFadeOut {
  from { opacity: 1; transform: translateY(0); }
  to { opacity: 0; transform: translateY(-10px); }
}

/* ===== FOOTER ===== */
.site-footer {
  background: #050810;
  border-top: 1px solid var(--border);
  padding: 4rem 0 0;
}
.footer-inner {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 2rem 3rem;
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: 3rem;
}
.footer-logo { margin-bottom: 1rem; }
.footer-desc { font-size: 0.9rem; color: var(--text-secondary); margin-bottom: 0.75rem; }
.footer-address { font-style: normal; font-size: 0.85rem; color: var(--text-muted); line-height: 1.6; }

.footer-col h4 {
  font-family: var(--font-body);
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-primary);
  margin-bottom: 1.2rem;
}
.footer-col ul { list-style: none; }
.footer-col li { margin-bottom: 0.6rem; }
.footer-col a {
  font-size: 0.88rem;
  color: var(--text-muted);
  text-decoration: none;
  transition: color 0.3s;
}
.footer-col a:hover { color: var(--blue-light); }

.footer-contacts {
  border-top: 1px solid var(--border);
}
.footer-contacts-inner {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 2.5rem 2rem;
}
.footer-contacts-inner > h4 {
  font-family: var(--font-body);
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-primary);
  margin-bottom: 1.5rem;
}
.footer-contacts-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2.5rem;
}
.footer-contact-group h5 {
  font-family: var(--font-body);
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--blue-light);
  margin-bottom: 1rem;
}
.footer-contact-item {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  margin-bottom: 1rem;
}
.footer-contact-name {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-secondary);
}
.footer-contact-role {
  font-size: 0.8rem;
  color: var(--text-muted);
}
.footer-contact-email {
  font-size: 0.8rem;
  color: #7baec8;
  text-decoration: none;
  transition: color 0.3s;
}
.footer-contact-email:hover { color: #aed4ee; }

@media (max-width: 768px) {
  .footer-contacts-grid { grid-template-columns: 1fr; gap: 1.5rem; }
}

.footer-bottom {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 1.5rem 2rem;
  border-top: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.82rem;
  color: var(--text-muted);
}
.footer-socials { display: flex; gap: 1rem; }
.footer-socials a {
  color: var(--text-muted);
  transition: color 0.3s, transform 0.3s;
}
.footer-socials a:hover { color: var(--blue-light); transform: translateY(-2px); }

/* ===== RESPONSIVE ===== */
@media (max-width: 1024px) {
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .why-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-inner { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .header-inner { grid-template-columns: auto 1fr; }
  .main-nav { display: none; }
  .btn-espace-eleves span { display: none; }
  .btn-espace-eleves { padding: 0.5rem 0.7rem; }
  .burger { display: flex; }
  .mobile-menu { display: flex; }

  .hero-title { font-size: clamp(2.2rem, 8vw, 3.5rem); }
  .hero-subtitle br { display: none; }
  .hero-ctas { flex-direction: column; align-items: center; }

  .stats-grid { grid-template-columns: 1fr 1fr; gap: 1rem; }
  .stat-number { font-size: 2.2rem; }

  .parcours-teaser { padding: 2.5rem 2rem; }
  .parcours-badges { flex-direction: column; gap: 0.4rem; }
  .parcours-sep { display: none; }

  .why-grid { grid-template-columns: 1fr 1fr; gap: 1.5rem; }

  .testimonial-card { padding: 2rem 1.5rem; }
  .testimonial-quote p { font-size: 1.15rem; }

  .footer-inner { grid-template-columns: 1fr; gap: 2rem; }
  .footer-bottom { flex-direction: column; gap: 1rem; text-align: center; }
}

@media (max-width: 480px) {
  .stats-grid { grid-template-columns: 1fr; }
  .why-grid { grid-template-columns: 1fr; }
  .section { padding: 4rem 0; }
  .container { padding: 0 1.25rem; }
}