.pstandard{
    font-size: 0.9em;
}

.illustration {
  width: 250px;
}

.animation {
  width: 700px;
}


.horizontal-box {
    display: flex;
    align-items: center;
}

.box {
    border: 2px solid black;
    padding: 5px;
    text-align: center;
    width: 200px;
  }

.pbox { font-size: 0.3em;

}

.horizontal-arrow {
    display: flex;
    align-items: center; 
    
}

.horizontal-line {
    width: 150px;
    height: 2px;
    background-color: black;
    margin: 10px 0;
  }

.arrow {
    border-top: 10px solid transparent;
    border-bottom: 10px solid transparent;
    border-left: 10px solid black;
    width: 0;
    height: 0;
    
  }

  .vertical-line {
    height: 110px;
    width: 2px;
    background-color: black;
  }

  .bottom-box {
    margin-top: -20px;
    border: 2px solid black;
    padding: 5px;
    text-align: center;
    width: 200px;
    margin-left: 575px;
  }

  .vertical-arrow {
    border-left: 10px solid transparent;
    border-right: 10px solid transparent;
    border-bottom: 10px solid black;
    margin: 0 auto;
  }

  .verticalarrow {
    display: flex;
    flex-direction: column;
    align-items: center;
    margin-left: 670px;
    margin-top: 120px;
    position: absolute;
  }

  .image {
    width: 300px;
  }

  .schema {
    display: flex;
    flex-direction: row;
    align-items: center;
    
  }

  .exemple {
    display: flex;
    flex-direction: row;
    align-items: center;
  }

  .exemple2 {
    margin-left: 130px;
    flex-direction: column;
    align-items: center;
  }

  .exercice {
    border: black solid 1px;
    border-radius: 6px;
    background-color: rgb(123, 194, 216);
  }
  
  ol { 
    font-size: 0.5em;
  }

  .btnValidateAnswer {
    background: #93c9be;
      background-image: -webkit-linear-gradient(top, #93c9be,#3ea38f);
      background-image: -moz-linear-gradient(top,#93c9be,#3ea38f);
      background-image: -ms-linear-gradient(top,#93c9be,#3ea38f);
      background-image: -o-linear-gradient(top,#93c9be,#3ea38f);
      background-image: linear-gradient(to bottom,#93c9be,#3ea38f);
      font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
      color: #ffffff;
      font-size: 1rem;
      padding: 10px 20px 10px 20px;
      margin: 20px;
      text-decoration: none;
      border:none;
      border-radius: 50px;
      margin-bottom: 20px;
  }
  
  .btnValidateAnswer:hover {
    background: #3cb0fd;
      background-image: -webkit-linear-gradient(top, #709a91,#2d7869);
      background-image: -moz-linear-gradient(top, #709a91,#2d7869);
      background-image: -ms-linear-gradient(top, #709a91,#2d7869);
      background-image: -o-linear-gradient(top, #709a91,#2d7869);
      background-image: linear-gradient(to bottom, #709a91,#2d7869);
      text-decoration: none;
  }