body {
    display: flex;
    background-color: #f8f9fa;
}
.main-content {
    margin-left: 250px;
    width: calc(100% - 250px);
}

.box{
    background-image: url('assets/img/login_background.png');
    background-repeat: no-repeat;
    background-size: cover; /* couvre tout l'écran */
    background-position: center; /* centre l'image */
    background-attachment: fixed; /* image fixe lors du scroll */
}

/*===   section realisations   ===*/
.portfolio .portfolio-item {
  position: relative;
  overflow: hidden;
}

.portfolio .portfolio-item .portfolio-info {
  opacity: 0;
  position: absolute;
  left: 12px;
  right: 12px;
  bottom: -100%;
  z-index: 3;
  transition: all ease-in-out 0.5s;
  background: color-mix(in srgb, var(--surface-color), transparent 10%);
  padding: 15px;
}

.portfolio .portfolio-item .portfolio-info h4 {
  font-size: 18px;
  font-weight: 600;
  padding-right: 50px;
}

.portfolio .portfolio-item .portfolio-info p {
  color: color-mix(in srgb, var(--default-color), transparent 30%);
  font-size: 14px;
  margin-bottom: 0;
  padding-right: 50px;
}

.portfolio .portfolio-item .portfolio-info .preview-link,
.portfolio .portfolio-item .portfolio-info .details-link {
  position: absolute;
  right: 50px;
  font-size: 24px;
  top: calc(50% - 14px);
  color: color-mix(in srgb, var(--default-color), transparent 30%);
  transition: 0.3s;
  line-height: 0;
}

.portfolio .portfolio-item .portfolio-info .preview-link:hover,
.portfolio .portfolio-item .portfolio-info .details-link:hover {
  color: var(--accent-color);
}

.portfolio .portfolio-item .portfolio-info .details-link {
  right: 14px;
  font-size: 28px;
}

.portfolio .portfolio-item:hover .portfolio-info {
  opacity: 1;
  bottom: 0;
}