/* Style appliqué au conteneur, pas au canvas */
.chart-container {
  margin-top: 20px !important;
  background-color: #ddd;
  border: 4px solid #a48b6d ;
  border-radius: 10px;
  padding: 10px;
  margin: 0 auto;
  width: 100%;
  max-width: 800px;
  /*height: 350px;*/
}

/* Le canvas garde ses dimensions automatiques */
#visitorsChart {
  display: block;
  width: 100% !important;
  /*height: 300px !important;*/
}

.title_chart {
  margin-top: 20px;
  text-align: center;
  font-size: 24px;
}

@media screen and (max-width: 768px) {
  .chart-container {
    width:110%;
    padding: 1px;
    margin-left:-20px;
    margin-right: -20px;
  }
}