/*section video du cours version 1*/

.contenu {
  display: flex;
  flex-wrap: wrap;              
  justify-content: center;      
  gap: 20px;                   
  padding: 20px;}

.video {
  width: 380px;                
  border: 2px solid #8e44ad;
  border-radius: 10px;
  padding: 10px;
  background-color: #fdfdfd;}

.titre-playlist {
  width: 100%;
  font-size: 20px;
  font-weight: bold;
  margin-bottom: 10px;
  color:#4460ad ;
}
h4{
    font-size: 18px;
    color: #448cad;
    text-align: center;
}

/* section video metabolisme cellulaire*/
.titre{
    padding: 20px;
    margin: 0 auto; 
    width: 80%;
    margin-top: 280px;
    text-align: center;
    line-height: 2rem;
}
.video-section {
      background: white;
      border-radius: 12px;
      overflow: hidden;
      box-shadow: 0px 4px 10px rgba(0,0,0,0.1);
      transition: transform 0.2s ease;
    }

.video-section {
  max-width: 900px;
  margin: 20px auto;
  background: #fff;
  border-radius: 16px;
  box-shadow: 0 4px 24px rgba(0,0,0,0.08);
  padding: 32px;
  text-align: justify;
}


.video-section h2 {
  font-size: 2rem;
  margin-bottom: 24px;
  padding-left: 20px;
  color: #4f709c;
  border-left: 3px solid #6e99d2;
  text-align: center;
}

.video-container {
  position: relative;
  width: 100%;
  padding-bottom: 56.25%; 
  height: 0;
  margin-bottom: 24px;}

.video-container video {
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 100%;
  border-radius: 12px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.12);
}

.video-description {
  font-size: 1.1rem;
  color: #4a5a6a;
  margin-top: 16px;
}