.certificates_main{
    padding: 120px 0 100px;
}
.certificates_main .head{
    margin-bottom: 24px;
}

.certificates_main .certi_nav ul{
    display: flex;
    gap: 13px;
}
.certificates_main .certi_nav ul li a{
    display: inline-block;
    line-height: 50px;
    padding: 0 23px;
    transition: all 0.3s;
    color: white;
    font-family: 'Saira', sans-serif;
    font-weight: 400;
    background-color: #0C0D11;
}
.certificates_main .certi_nav ul li a:hover{
    background-color: var(--primary);
}
.certificates_main .certi_nav ul li.active a{
    padding: 0 30px;
    background-color: var(--primary);
    clip-path: polygon(
        0 0,
        100% 0,
        100% 100%,
        9px 100%,
        0 calc(100% - 9px)
    );
}
.certificates_main .main{
    margin-top: 76px;
}
.certificates_main .main ul{
    display: grid;
    grid-template-columns: repeat(3,1fr);
    gap: 39px 24px;
}
.certificates_main .main ul .item{
    display: block;
    border: 1px solid #e4e4e7;
}
.certificates_main .main ul .item .img{
    aspect-ratio: 463/320;
    background-color: #F7F7F7;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}
.certificates_main .main ul .item .img img{
    width: 80%;
    height: 76%;
    object-fit: contain;
}
.certificates_main .main ul .item .img .icon{
    width: 40px;
    height: 40px;
    background: url('../img/lightbox.svg') no-repeat center/contain;
    position: absolute;
    right: 25px;
    bottom: 25px;
}
.certificates_main .main ul .item .info{
    padding: 27px 31px;
}
.certificates_main .main ul .item .info .title{
    font-size: 24px;
    line-height: 32px;
    font-family: 'Saira', sans-serif;
    font-weight: 500;
    color: #0d0d0d;
}
.certificates_main .main ul .item .info .title + span{
    color: var(--primary);
    font-size: 16px; 
    font-family: 'Saira', sans-serif;
    font-weight: 600;
    display: block;
    margin-bottom: 18px;
    text-transform: uppercase;
}
.certificates_main .main ul .item .info>p{
    font-size: 17px;
    line-height: 24px;
    color: #42454d;
    min-height: 72px;
}
.certificates_main .main ul .item .attrs{
    margin-top: 20px;
    padding-top: 26px;
    border-top: 1px solid #e4e4e4;
    justify-content: space-between;
}
.certificates_main .main ul .item .attrs>div{
    flex: 1;
}
.certificates_main .main ul .item .attrs>div span{
    font-size: 14px;
    color: #6b6b6b;
}
.certificates_main .main ul .item .attrs>div p{
    font-weight: 700;
    color: #0d0d0d;
    font-size: 18px;
}
.certificates_main .main ul .item:hover img{
    transform: scale(1.05);
}

/* AJAX filter / load-more transitions */
.certificates_main .main ul{
    transition: opacity 0.3s ease;
}
.certificates_main .main ul.is-loading{
    opacity: 0.35;
}
.certificates_main .main ul li{
    transition: opacity 0.5s ease, transform 0.5s ease;
    will-change: opacity, transform;
}
.certificates_main .main ul li.cert-enter{
    opacity: 0;
    transform: translateY(24px);
}

/* ------------------------------------------------------------------
   Responsive
   ------------------------------------------------------------------ */
@media screen and (max-width: 1024px) {
  .certificates_main {
    padding: 90px 0 70px;
  }
  .certificates_main .main {
    margin-top: 50px;
  }
  .certificates_main .main ul {
    grid-template-columns: repeat(2, 1fr);
  }
}
@media screen and (max-width: 768px) {
  .certificates_main {
    padding: 50px 0;
  }
  .certificates_main .head {
    margin-bottom: 20px;
  }
  /* Filter nav → horizontal scroll */
  .certificates_main .certi_nav ul {
    flex-wrap: nowrap;
    overflow-x: auto;
  }
  .certificates_main .certi_nav ul::-webkit-scrollbar {
    display: none;
  }
  .certificates_main .certi_nav ul li {
    flex-shrink: 0;
  }
  .certificates_main .certi_nav ul li a {
    line-height: 44px;
    padding: 0 20px;
  }
  .certificates_main .certi_nav ul li.active a {
    padding: 0 24px;
  }
  .certificates_main .main {
    margin-top: 30px;
  }
  .certificates_main .main ul {
    gap: 20px 16px;
  }
  .certificates_main .main ul .item .info {
    padding: 20px;
  }
  .certificates_main .main ul .item .info .title {
    font-size: 20px;
    line-height: 28px;
  }
  .certificates_main .main ul .item .info .title + span {
    font-size: 14px;
    margin-bottom: 12px;
  }
  .certificates_main .main ul .item .info > p {
    font-size: 15px;
    line-height: 22px;
    min-height: 0;
  }
  .certificates_main .main ul .item .attrs {
    margin-top: 16px;
    padding-top: 16px;
  }
  .certificates_main .main ul .item .attrs > div p {
    font-size: 16px;
  }
}
@media screen and (max-width: 576px) {
  .certificates_main .main ul {
    grid-template-columns: 1fr;
  }
}