body {
  margin: 0;
  font-family: 'Helvetica Neue', sans-serif;
  background: #fff;
  color: #111;
}
header {
  background: rgba(0, 0, 0, 0.8);
  padding: 1rem 0;
  position: sticky;
  top: 0;
  z-index: 999;
}
.container {
  width: 90%;
  max-width: 1200px;
  margin: 0 auto;
}
.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.nav-links {
  list-style: none;
  display: flex;
  gap: 1rem;
  padding-left: 0;
}
.nav-links li {
  list-style: none;
}
.nav-links a {
  color: white;
  text-decoration: none;
  font-weight: bold;
}
.logo {
  color: white;
  font-size: 1.5rem;
}
.hero {
  height: 90vh;
  background: url('../img/hero.jpg') no-repeat center center/cover;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
}
.hero-content {
  color: white;
  background: rgba(0,0,0,0.5);
  padding: 2rem;
}
.hero .btn {
  display: inline-block;
  margin-top: 1rem;
  padding: 0.8rem 1.5rem;
  background: gold;
  color: #111;
  text-decoration: none;
  font-weight: bold;
  border-radius: 5px;
}
footer {
  background: #111;
  color: white;
  text-align: center;
  padding: 1rem 0;
  margin-top: 2rem;
}
.presentation-split {
  display: flex;
  flex-wrap: wrap;
  background: white;
  align-items: center;
  justify-content: center;
  padding: 2rem 0;
}
.presentation-split__image,
.presentation-split__content {
  flex: 1 1 500px;
  padding: 1.5rem;
  box-sizing: border-box;
}
.presentation-split__image img {
  width: 100%;
  border-radius: 8px;
  object-fit: cover;
}
.presentation-split__content {
  position: relative;
  padding-right: 3rem;
}
.presentation-split__content p {
  font-size: 1.1rem;
  line-height: 1.7;
  margin-bottom: 1rem;
  color: #111;
}
.presentation-split__content .highlight {
  font-style: italic;
  color: #8b0000;
  font-weight: bold;
}
.presentation-split__content .btn.full {
  display: inline-block;
  background-color: #8b0000;
  color: white;
  padding: 0.8rem 1.5rem;
  margin-top: 1rem;
  border-radius: 5px;
  text-decoration: none;
  font-weight: bold;
  border: none;
}
.ruban-icon {
  width: 80px;
  position: absolute;
  top: 0;
  right: 0;
}
@media (max-width: 768px) {
  .presentation-split {
    flex-direction: column;
  }
  .presentation-split__content {
    padding: 1.5rem;
  }
  .ruban-icon {
    position: static;
    margin: 0 auto 1rem;
    display: block;
  }
}


/* Fond vidéo plein écran */
.video-background {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  right: 0;
  z-index: -1;
  overflow: hidden;
}

.video-foreground {
  position: absolute;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  pointer-events: none;
}

.video-foreground iframe {
  width: 100vw;
  height: 100vh;
}

/* Texte centré sur la vidéo */
.hero-text {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  height: 100vh;
  color: white;
  text-align: center;
  z-index: 2;
  position: relative;
  padding: 0 1rem;
  background-color: rgba(0, 0, 0, 0.4); /* fondu noir en fond pour la lisibilité */
}

.hero-text h1 {
  font-size: 2.5rem;
  font-weight: bold;
  margin-bottom: 1rem;
}

.hero-text p {
  font-size: 1.2rem;
  margin-bottom: 1.5rem;
}

.btn-yellow {
  background-color: #ffd500;
  color: #000;
  padding: 0.8rem 1.5rem;
  border-radius: 8px;
  text-decoration: none;
  font-weight: bold;
}