.portfolio .banner {
  padding-top: 80px;
}

.portfolio .scroll-portfolio {
  position: relative;
 /* overflow: auto; */
  margin-bottom: 80px;
  z-index: 0;
}

.portfolio-list .navigate-portfolio {
  position: fixed;
  top: 25%;
  right: 0;
  text-align: right;
  z-index: 1;
  opacity: 0;
  width: 200px;
}

.portfolio .portfolio-list .navigate-portfolio ul {
  padding: 40px 0px 40px 40px;
  background-color: var(--dark-grey);
  list-style: none;
  margin: 0;
}

.navigation-row-mobile {
  display: none;
}

.portfolio .portfolio-list .navigate-portfolio ul .tab-link {
  margin-bottom: 25px;
  position: relative;
  padding-right: 32px;
}

.portfolio .portfolio-list .navigate-portfolio ul .tab-link a {
  font-size: 1.125rem; /*18px;*/
  font-weight: 600;
  font-stretch: normal;
  font-style: normal;
  line-height: 1.5rem; /*24px*/
  letter-spacing: normal;
  color: var(--four-grey);
  text-decoration: none;
  text-transform: uppercase;
}

.portfolio .portfolio-list .navigate-portfolio ul .tab-link::after {
  position: absolute;
  content: "";
  width: 26px;
  height: 2px;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  background-color: var(--four-grey);
}

.portfolio .portfolio-list .navigate-portfolio ul .tab-link::after {
  position: absolute;
  content: "";
  width: 26px;
  height: 2px;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  background-color: var(--four-grey);
}

.portfolio .portfolio-list .navigate-portfolio ul .tab-link:hover a {
  color: var(--white);
}

.portfolio .portfolio-list .navigate-portfolio ul .tab-link .active {
  color: var(--white);
  position: relative;
}

.portfolio .portfolio-list .navigate-portfolio ul .tab-link .active::after {
  position: absolute;
  content: "";
  width: 26px;
  height: 2px;
  right: -32px;
  top: 50%;
  transform: translateY(-50%);
  background-color: var(--yellow);
  z-index: 1000;
}

.portfolio .portfolio-block {
  padding-bottom: 80px;
  margin-bottom: 150px;
  position: relative;
  z-index: 0;
}

.portfolio .portfolio-block img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
}

.portfolio .portfolio-block .content {
  position: absolute;
  z-index: 1;
}

.portfolio .portfolio-block .content .portfolio-title {
  font-family: Poppins;
  font-size: 1rem;
  font-weight: 500;
  font-stretch: normal;
  font-style: normal;
  line-height: 1.375rem;
  letter-spacing: normal;
  text-align: left;
  color: var(--white);
  text-transform: uppercase;
  margin-top: 0;
  margin-bottom: 4px;
}

.portfolio .portfolio-block .content .portfolio-name {
  font-family: Poppins;
  font-size: 1.25rem; /*20px*/
  font-weight: normal;
  font-stretch: normal;
  font-style: normal;
  line-height: 1.75rem; /*28px*/
  letter-spacing: normal;
  text-align: left;
  color: var(--yellow);
  margin-top: 0;
  margin-bottom: 4px;
}

.portfolio .portfolio-block .content p {
  font-family: Poppins;
  font-size: 1rem; /*16px*/
  font-weight: normal;
  font-stretch: normal;
  font-style: normal;
  line-height: 1.5rem; /*24px*/
  letter-spacing: normal;
  text-align: left;
  color: var(--grey);
  margin-top: 0;
  margin-bottom: 20px;
}

.portfolio .portfolio-block:hover {
  cursor: pointer;
}

.portfolio .portfolio-block:hover .content {
  background-color: rgba(0, 0, 0, 0.3);
}

.portfolio .portfolio-block .content {
  width: 65%;
  margin-top: -30px;
}

/* for mobile devices */
@media screen and (max-width: 767px) {
  .portfolio .banner {
    padding-top: 40px;
  }

  .navigate-portfolio {
    display: none;
  }

  .portfolio-list .scroll-portfolio section {
    display: none;
  }

  .portfolio-list .scroll-portfolio section.active {
    display: block;
  }

  .portfolio .portfolio-block {
    padding-top: 40px;
    /* margin-bottom: 6px; */
    margin-bottom: 75px;
  }

  .portfolio .navigation-row-mobile {
    display: block;
  }

  .portfolio .navigation-row-mobile.sticky {
    position: fixed;
    z-index: 2;
    top: 50px;
    background-color: var(--black);
    width: 33.8vh;
    left: 50%;
    transform: translate(-50%, 0);
  }
  #portfolio_list{
    padding: 0;
  }
  .portfolio .portfolio-block .content {
    width: 100%;
  }
  .portfolio .portfolio-block .content p {
    min-height: 100px;
    margin-bottom: 10px;
  }
 
}
.second-picture{
  background-size:cover;
  min-height:265px;
  background-size:cover;
  background-position:center;
  opacity:0;
  transition:.2s;
}
.second-picture:hover{
  opacity:1;
}
.thumbnail-image {
  background-size:cover;
  min-height:265px;
}
@media screen and (max-width: 767px) {
  .second-picture{
    min-height: 179px;
  }
  .thumbnail-image {
    min-height: 179px;
  }
}
.category-title{
  padding-left: 10px;
  margin: 0;
  margin-bottom: 3rem;
  font-family: Poppins;
  font-size: 28px; /* 18px */
  font-weight: 600; /* semi bold */
  font-stretch: normal;
  font-style: normal;
  line-height: 1.375rem; /* 22px */
  letter-spacing: normal;
  text-align: left;
  color: var(--white);
  text-transform: uppercase;
}
section{
  scroll-margin-top: 75px;
}
@media screen and (max-width: 767px){
  .category-title{
    margin-bottom: 1rem;
    margin-top: 3rem;
    line-height: 1.3;
  }
}