/* 🔝 Navigation */
nav {
  background: white;
  padding: 12px;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}
.navbutton {
  background: #0077ff;
  color: white;
  font-weight: 600;
  border: none;
  margin: 5px;
  padding: 8px 15px;
  border-radius: 20px;
  transition: 0.3s;
}
.navbutton a {
  text-decoration: none;
  color: white;
}
.navbutton:hover {
  background: #005fcc;
  transform: translateY(-2px);
}
#certificats {
  padding: 50px 20px;
  background-color: #f9f9f9;
  text-align: center;
}

.certificats-container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 20px;
  margin-top: 30px;
}

.certificat {
  background: #fff;
  padding: 20px;
  border-radius: 15px;
  box-shadow: 0 0 10px rgba(0,0,0,0.1);
}

.certificat img {
  width: 100%;
  height: auto;
  border-radius: 10px;
  margin-bottom: 15px;
}