body {
  margin: 0;
  background: #f6f8fa;
  flex-direction: column;
  display: flex;
  align-items: center;
  justify-content: center;
}

#studyachivelink p{
  font-family: 'Roboto Mono', monospace, serif, sans-serif;
  font-size: 1.5rem;
  color: #555;
  text-decoration: none;
  opacity: 0.9;
  scale: 0.9;
  transition-duration: 0.5s;
}
#studyachivelink p:hover{
  opacity: 1;
  scale: 1;
  transition-property: all;
}

#studyachivelink{
  text-decoration: none;
  margin-bottom: 20px;
}
#studyachivelink:hover {
  text-decoration: underline;
  transition-duration: 0.5s;
}
#studyachivelink:visited {
  color: #555;
}
header{
  display:  flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  margin-top: 315px;
  margin-bottom: 320px;
}

h1{
  font-family: 'Roboto Mono', monospace, serif, sans-serif;
  font-size: 5rem;
  color: #333;
  margin: 0;
}

#luffyGearFive{
  width: 300px;
  border-radius: 15px;
  position: absolute;
  z-index:-1;
  margin-left: 525px;
  opacity: 0.8;
  box-shadow: 20px 20px 2.5px rgba(32, 32, 32, 0.1);
}

h2{
  font-family: 'Tangerine', cursive, serif, sans-serif;
  font-size: 4rem;
  margin: 10px 0px 30px 0px;
}

#lang {
  font-size: 2rem;
  padding: 0.5rem 1rem;
  border-radius: 8px;
  box-shadow: 0 6px 18px rgba(0,0,0,0.06);
  background: white;
  opacity: 0;
  transition: opacity 300ms ease;
  margin: 0 ;
}

    /* classe contrôlant la visibilité (pour effet fondu) */
#lang.visible {
  opacity: 1;
}

    /* Box1 */
.box1{
  font-family: 'Roboto Mono', monospace, serif, sans-serif;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  width: 600px;
  border-radius: 15px;
  background: white;
  box-shadow: 0 6px 18px rgba(0,0,0,0.06);
  margin-bottom: 20px;
  padding: 25px;
}
#UniversitéLogo{
  position: absolute;
  width: 300px;
  opacity: 0.5;
  z-index: -1;
  margin-bottom: 340px;
}
.box1 img{
  width: 35px;
  margin-bottom: 15px;
  transition-duration: 0.3s;
  margin: 5px;
}
.box1 img:hover{
  scale: 1.2;
}

.certificatsBox{
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  margin-top: 15px;
}
.certificatsBox img{
  width: 200px;
  margin: 10px;
    
}

.projectbox{
  font-family: 'Roboto Mono', monospace, serif, sans-serif;
  margin-top: 25px;    
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}

footer{
  margin-top: 30px;
  height: 50px;
  width: 100%;
  background-color: #126fcc;
}


/* Styles pour les petits écrans */

@media (max-width: 960px) {
    #luffyGearFive{
    width: 250px;
    margin-left: 350px;
  }
}

@media (max-width: 725px) {
  h1 {
    font-size: 3re
  }

  #luffyGearFive{
    width: 200px;
    margin-left: 250px;
  }

  h2 {
    font-size: 2.5rem;
  }

  #lang {
    font-size: 1.5rem;
  }

  #studyachivelink p {
    font-size: 1.3rem;
  }

  .box1{
    width: 350px;
  }
  #UniversitéLogo{
    width: 200px;
    margin-bottom: 425px;
  }
  .box1 img{
    width: 30px;
  }

  .certificatsBox img{
    width: 150px;
  }

  .projectbox p{
    font-size: 1rem;
  }
}

/* Styles pour les très petits écrans */

@media (max-width: 430px) {

  header{
    margin-top: 150px;
    margin-bottom: 150px;
  }

  h1 {
    font-size: 2.7rem;
  }

  #luffyGearFive{
    width: 100px;
    margin-left:0;
    box-shadow: none;
  }

  h2 {
    font-size: 2.5rem;
  }

  #lang {
    font-size: 1.4rem;
  }

  #studyachivelink p{
    font-size: 1rem;
  }

  .box1{
    width: 250px;
  }
  #UniversitéLogo{
    width: 150px;
    margin-bottom: 495px;
  }
  .box1 img{
    width: 25p
  }

  .projectbox p{
    font-size: 0.9rem;
    text-align: center;
  }
}