/* ============================================================
   VBO COLLAB — design premium
   Palette héritée du site d'origine : bleu nuit / bleu électrique
   ============================================================ */
:root {
  --nuit: #0d141a;
  --nuit-2: #101a26;
  --marine: #1B263B;
  --bleu: #006cff;
  --cyan: #00d4ff;
  --gris-bleu: #B8C0CC;
  --fond-clair: #F4F8FB;
  --texte: #46505c;
  --blanc: #ffffff;
  --radius: 18px;
  --gradient: linear-gradient(100deg, var(--bleu), var(--cyan));
}

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

html { scroll-behavior: smooth; }

body {
  font-family: "Inter", sans-serif;
  color: var(--texte);
  line-height: 1.75;
  background: var(--blanc);
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  font-family: "Space Grotesk", sans-serif;
  color: var(--marine);
  line-height: 1.15;
  letter-spacing: -0.02em;
}

img { max-width: 100%; display: block; }

.container { max-width: 1160px; margin: 0 auto; padding: 0 24px; }
.container-narrow { max-width: 720px; }

.gradient-text {
  background: var(--gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.eyebrow {
  display: inline-block;
  font-family: "Space Grotesk", sans-serif;
  font-size: 0.82rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--bleu);
  margin-bottom: 14px;
}

.eyebrow-light { color: var(--cyan); }

/* ============ Header ============ */
.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 100;
  transition: background 0.3s, box-shadow 0.3s;
}

.site-header.scrolled {
  background: rgba(13, 20, 26, 0.85);
  backdrop-filter: blur(14px);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.25);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 16px;
  padding-bottom: 16px;
}

.brand { display: flex; align-items: center; gap: 12px; text-decoration: none; }
.brand-logo { height: 42px; filter: drop-shadow(0 2px 8px rgba(0, 108, 255, 0.4)); }

.brand-name {
  font-family: "Space Grotesk", sans-serif;
  font-weight: 700;
  font-size: 1.35rem;
  color: var(--blanc);
  letter-spacing: 0.02em;
}

.brand-accent { color: var(--cyan); }

.site-nav { display: flex; align-items: center; gap: 32px; }

.site-nav a {
  text-decoration: none;
  color: rgba(255, 255, 255, 0.85);
  font-weight: 500;
  font-size: 0.95rem;
  transition: color 0.2s;
}

.site-nav a:hover, .site-nav a.active { color: var(--cyan); }

.btn-nav {
  background: var(--gradient);
  color: var(--blanc) !important;
  padding: 10px 22px;
  border-radius: 100px;
  font-weight: 600;
}

.btn-nav:hover { opacity: 0.9; }

.nav-toggle { display: none; background: none; border: none; cursor: pointer; }
.nav-toggle span {
  display: block;
  width: 26px; height: 2px;
  background: var(--blanc);
  margin: 6px 0;
  transition: transform 0.3s, opacity 0.3s;
}
.nav-toggle.open span:nth-child(1) { transform: translateY(8px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-8px) rotate(-45deg); }

/* ============ Hero ============ */
.hero, .page-hero {
  position: relative;
  background: radial-gradient(ellipse at 50% -20%, #16283f 0%, var(--nuit) 60%);
  color: var(--blanc);
  overflow: hidden;
  text-align: center;
}

.hero { padding: 190px 0 130px; }
.page-hero { padding: 170px 0 90px; }

.hero-bg { position: absolute; inset: 0; pointer-events: none; }

.blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(90px);
  opacity: 0.5;
  animation: flotte 14s ease-in-out infinite alternate;
}

.blob-1 { width: 480px; height: 480px; background: rgba(0, 108, 255, 0.45); top: -160px; left: -120px; }
.blob-2 { width: 420px; height: 420px; background: rgba(0, 212, 255, 0.28); bottom: -180px; right: -100px; animation-delay: -5s; }
.blob-3 { width: 300px; height: 300px; background: rgba(0, 108, 255, 0.3); top: 30%; right: 15%; animation-delay: -9s; }

@keyframes flotte {
  from { transform: translate(0, 0) scale(1); }
  to   { transform: translate(60px, 40px) scale(1.15); }
}

.grid-overlay {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.035) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse at 50% 30%, black 30%, transparent 75%);
}

.hero-inner { position: relative; z-index: 1; }

.hero-badge {
  display: inline-block;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--cyan);
  background: rgba(0, 212, 255, 0.09);
  border: 1px solid rgba(0, 212, 255, 0.3);
  padding: 7px 18px;
  border-radius: 100px;
  margin-bottom: 30px;
  animation: pulse-badge 2.6s ease-in-out infinite;
}

@keyframes pulse-badge {
  0%, 100% { box-shadow: 0 0 0 0 rgba(0, 212, 255, 0.25); }
  50% { box-shadow: 0 0 0 9px rgba(0, 212, 255, 0); }
}

.hero h1, .page-hero h1 {
  color: var(--blanc);
  font-size: clamp(2.4rem, 6vw, 4.3rem);
  font-weight: 700;
  margin-bottom: 26px;
}

.hero-sub {
  color: var(--gris-bleu);
  font-size: 1.22rem;
  font-weight: 300;
  max-width: 680px;
  margin: 0 auto 42px;
}

.hero-sub strong { color: var(--blanc); font-weight: 500; }

.hero-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 72px;
}

.hero-stats {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 44px;
  flex-wrap: wrap;
}

.stat { text-align: center; }

.stat-num {
  display: block;
  font-family: "Space Grotesk", sans-serif;
  font-size: 2.5rem;
  font-weight: 700;
  background: var(--gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.stat-label { font-size: 0.88rem; color: var(--gris-bleu); }

.stat-sep { width: 1px; height: 48px; background: rgba(255, 255, 255, 0.12); }

.hero-fade {
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 90px;
  background: linear-gradient(transparent, var(--blanc));
}

/* ============ Sections ============ */
.section { padding: 100px 0; }

.section-head { text-align: center; margin-bottom: 64px; }

.section-head h2, .split-text h2 {
  font-size: clamp(1.8rem, 3.6vw, 2.7rem);
  font-weight: 700;
}

.section-dark {
  background:
    radial-gradient(ellipse at 80% 0%, rgba(0, 108, 255, 0.12) 0%, transparent 55%),
    var(--nuit-2);
}

.on-dark { color: var(--blanc); }

.lead { font-size: 1.18rem; margin-bottom: 22px; }
.lead-left { font-size: 1.12rem; color: var(--marine); font-weight: 500; margin-bottom: 16px; }

.section p + p { margin-top: 16px; }

/* ============ Apparition au scroll ============ */
.reveal {
  opacity: 0;
  transform: translateY(34px);
  transition: opacity 0.7s cubic-bezier(0.2, 0.6, 0.2, 1), transform 0.7s cubic-bezier(0.2, 0.6, 0.2, 1);
}

.reveal.visible { opacity: 1; transform: none; }

.reveal:nth-child(2) { transition-delay: 0.1s; }
.reveal:nth-child(3) { transition-delay: 0.2s; }
.reveal:nth-child(4) { transition-delay: 0.3s; }

/* ============ Cartes services ============ */
.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 28px;
}

.service-card {
  position: relative;
  background: var(--blanc);
  border: 1px solid #e4eaf2;
  border-radius: var(--radius);
  padding: 38px 32px;
  transition: transform 0.3s, box-shadow 0.3s, border-color 0.3s;
  overflow: hidden;
}

.service-card::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(420px circle at var(--mx, 50%) var(--my, 50%), rgba(0, 108, 255, 0.07), transparent 45%);
  opacity: 0;
  transition: opacity 0.3s;
}

.service-card:hover::before { opacity: 1; }

.service-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 24px 50px rgba(13, 20, 26, 0.12);
  border-color: rgba(0, 108, 255, 0.35);
}

.service-icon {
  width: 58px; height: 58px;
  display: grid;
  place-items: center;
  border-radius: 14px;
  background: linear-gradient(135deg, rgba(0, 108, 255, 0.12), rgba(0, 212, 255, 0.12));
  color: var(--bleu);
  margin-bottom: 24px;
}

.service-icon svg { width: 28px; height: 28px; }

.service-card h3 { font-size: 1.28rem; margin-bottom: 14px; }
.service-card p { font-size: 0.97rem; }

.card-link {
  display: inline-block;
  margin-top: 18px;
  color: var(--bleu);
  font-weight: 600;
  font-size: 0.95rem;
  text-decoration: none;
}

.card-link:hover { text-decoration: underline; }

/* ============ Méthode (étapes) ============ */
.steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 28px;
}

.step {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.09);
  border-radius: var(--radius);
  padding: 32px 28px;
  transition: transform 0.3s, background 0.3s;
}

.step:hover { transform: translateY(-6px); background: rgba(255, 255, 255, 0.07); }

.step-num {
  font-family: "Space Grotesk", sans-serif;
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  background: var(--gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.step h3 { color: var(--blanc); font-size: 1.2rem; margin: 12px 0 10px; }
.step p { color: var(--gris-bleu); font-size: 0.94rem; }

/* ============ Deux colonnes ============ */
.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 70px;
  align-items: center;
}

.split-text h2 { margin-bottom: 20px; }

.media-frame {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: 0 30px 70px rgba(13, 20, 26, 0.22);
}

.media-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(160deg, rgba(0, 108, 255, 0.18), transparent 55%);
}

.checklist { list-style: none; margin: 24px 0 30px; }

.checklist li {
  position: relative;
  padding: 8px 0 8px 36px;
  font-size: 1rem;
}

.checklist li::before {
  content: "";
  position: absolute;
  left: 0; top: 12px;
  width: 22px; height: 22px;
  border-radius: 50%;
  background: linear-gradient(135deg, rgba(0,108,255,0.15), rgba(0,212,255,0.15));
}

.checklist li::after {
  content: "✓";
  position: absolute;
  left: 5px; top: 8px;
  color: var(--bleu);
  font-weight: 700;
  font-size: 0.85rem;
}

/* ============ Qualifications ============ */
.quali-cards { display: grid; gap: 16px; margin-top: 28px; }

.quali {
  display: flex;
  align-items: center;
  gap: 20px;
  background: var(--fond-clair);
  border-radius: 14px;
  padding: 18px 22px;
}

.quali-annee {
  font-family: "Space Grotesk", sans-serif;
  font-weight: 700;
  font-size: 1.15rem;
  background: var(--gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  flex-shrink: 0;
}

.quali p { font-size: 0.95rem; }

/* ============ Compétences (grille sombre) ============ */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
}

.skill-card {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.09);
  border-radius: var(--radius);
  padding: 30px 28px;
  transition: transform 0.3s, border-color 0.3s;
}

.skill-card:hover { transform: translateY(-5px); border-color: rgba(0, 212, 255, 0.4); }

.skill-card h3 { color: var(--blanc); font-size: 1.12rem; margin-bottom: 10px; }
.skill-card p { color: var(--gris-bleu); font-size: 0.93rem; }

.skill-card-accent {
  background: linear-gradient(135deg, rgba(0, 108, 255, 0.18), rgba(0, 212, 255, 0.09));
  border-color: rgba(0, 212, 255, 0.35);
}

/* ============ Événement ============ */
.event-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
  margin-bottom: 56px;
}

.event-item {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.09);
  border-radius: var(--radius);
  padding: 28px;
  text-align: center;
}

.event-icon {
  width: 52px; height: 52px;
  display: grid;
  place-items: center;
  margin: 0 auto 16px;
  border-radius: 14px;
  background: linear-gradient(135deg, rgba(0, 108, 255, 0.16), rgba(0, 212, 255, 0.16));
  color: var(--cyan);
}

.event-icon svg { width: 26px; height: 26px; }
.event-item h3 { color: var(--blanc); font-size: 1.05rem; margin-bottom: 6px; }
.event-item p { color: var(--gris-bleu); font-size: 0.93rem; }

.event-complet { text-align: center; max-width: 680px; margin: 0 auto; }

.event-complet > p:first-child {
  font-family: "Space Grotesk", sans-serif;
  font-size: 1.5rem;
  color: var(--cyan);
  margin-bottom: 14px;
}

.event-note { color: var(--gris-bleu); font-size: 0.94rem; margin-bottom: 28px; }

/* ============ CTA final ============ */
.cta-final {
  position: relative;
  background:
    radial-gradient(ellipse at 50% 120%, rgba(0, 108, 255, 0.25) 0%, transparent 60%),
    var(--nuit);
  text-align: center;
  overflow: hidden;
}

.cta-final h2 { color: var(--blanc); font-size: clamp(2rem, 4.5vw, 3.2rem); margin-bottom: 22px; }
.cta-final p { color: var(--gris-bleu); max-width: 660px; margin: 0 auto 38px; font-size: 1.1rem; }

/* ============ Boutons ============ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 32px;
  border: none;
  border-radius: 100px;
  font-family: "Inter", sans-serif;
  font-size: 1rem;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  transition: transform 0.2s, box-shadow 0.2s, opacity 0.2s;
}

.btn-lg { padding: 17px 40px; font-size: 1.05rem; }

.btn .arrow { transition: transform 0.2s; }
.btn:hover .arrow { transform: translateX(5px); }

.btn-primary {
  background: var(--gradient);
  color: var(--blanc);
  box-shadow: 0 10px 30px rgba(0, 108, 255, 0.35);
}

.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 16px 38px rgba(0, 108, 255, 0.45); }

.btn-ghost {
  background: rgba(255, 255, 255, 0.06);
  color: var(--blanc);
  border: 1px solid rgba(255, 255, 255, 0.25);
  backdrop-filter: blur(6px);
}

.btn-ghost:hover { background: rgba(255, 255, 255, 0.12); }

/* ============ Contact ============ */
.contact-layout {
  display: grid;
  grid-template-columns: 1fr 1.3fr;
  gap: 60px;
  align-items: start;
}

.contact-aside h2 { font-size: 1.7rem; margin-bottom: 8px; }

.card-form {
  background: var(--blanc);
  border: 1px solid #e4eaf2;
  border-radius: var(--radius);
  padding: 40px;
  box-shadow: 0 24px 60px rgba(13, 20, 26, 0.09);
}

.contact-form { display: flex; flex-direction: column; }

.contact-form label {
  font-weight: 600;
  font-size: 0.92rem;
  margin: 18px 0 8px;
  color: var(--marine);
}

.contact-form label:first-child { margin-top: 0; }

.contact-form input, .contact-form textarea {
  padding: 14px 16px;
  border: 1.5px solid #dde5ee;
  border-radius: 12px;
  font: inherit;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.contact-form input:focus, .contact-form textarea:focus {
  outline: none;
  border-color: var(--bleu);
  box-shadow: 0 0 0 4px rgba(0, 108, 255, 0.12);
}

.contact-form .btn { margin-top: 28px; align-self: flex-start; }

/* ============ Flashes ============ */
.flashes { position: relative; z-index: 5; padding-top: 100px; margin-bottom: -70px; }

.flash { padding: 15px 20px; border-radius: 12px; margin-bottom: 10px; font-weight: 500; }
.flash-succes { background: #e6f7ec; color: #176639; border: 1px solid #b5e6c8; }
.flash-erreur { background: #fdecea; color: #93261c; border: 1px solid #f5c4bf; }

/* ============ Footer ============ */
.site-footer { background: var(--nuit); color: var(--gris-bleu); padding: 70px 0 0; }

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 50px;
  padding-bottom: 50px;
}

.footer-logo { height: 44px; margin-bottom: 18px; }
.footer-brand p { font-size: 0.95rem; }

.footer-col h4 {
  color: var(--blanc);
  font-size: 0.95rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin-bottom: 18px;
}

.footer-col a, .footer-col span {
  display: block;
  color: var(--gris-bleu);
  text-decoration: none;
  font-size: 0.93rem;
  padding: 4px 0;
}

.footer-col a:hover { color: var(--cyan); }

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding-top: 24px;
  padding-bottom: 24px;
  font-size: 0.88rem;
}

/* ============ Responsive ============ */
@media (max-width: 900px) {
  .split, .contact-layout { grid-template-columns: 1fr; gap: 44px; }
  .footer-grid { grid-template-columns: 1fr; gap: 34px; }
  .section { padding: 70px 0; }
  .hero { padding: 150px 0 100px; }

  .nav-toggle { display: block; }

  .site-nav {
    position: fixed;
    top: 74px; left: 0; right: 0;
    flex-direction: column;
    background: rgba(13, 20, 26, 0.97);
    backdrop-filter: blur(14px);
    padding: 30px 24px;
    gap: 22px;
    transform: translateY(-130%);
    transition: transform 0.35s cubic-bezier(0.2, 0.6, 0.2, 1);
  }

  .site-nav.open { transform: none; }

  .site-header { background: rgba(13, 20, 26, 0.9); backdrop-filter: blur(14px); }

  .stat-sep { display: none; }
  .hero-stats { gap: 30px; }
}