.container1 {
  margin: 0;
  padding: 0;
  padding-top: 2em;
  margin-bottom: 20px;
}
.portfolio{
	display: flex;
	justify-content: flex-start;
}

.col-lg-4.col-md-6{
	margin-bottom: 20px;
}

.portfolio img {
  width: 400px;
	height: 260px;
	margin: 0 auto;
  object-fit: cover;
}

.portfolio-menu {
  text-align: center;
  margin-bottom: 25px;
}

.portfolio-menu ul li {
  display: inline-block;
  margin: 0;
  list-style: none;
  margin: 0 5px;
  padding: 5px 15px;
  cursor: pointer;
  border: 2px solid white;
  border-radius: 4px;
  -webkit-transition: all 0.5s ease;
  -moz-transition: all 0.5s ease;
  -o-transition: all 0.5s ease;
  transition: all 0.5s ease;
}

.portfolio-menu ul li:hover {
  border: 2px solid #ff3a46;
  color: #ff3a46;
  border-radius: 4px;
}

.portfolio-menu ul li.active {
  border: 2px solid #ff3a46;
  color: #ff3a46;
  border-radius: 4px;
}



@media only screen and (max-width: 1024px) {
  .portfolio-menu ul li {
    font-size: 22px;
  }
}

@media only screen and (max-width: 768px) {
  .portfolio-menu ul li {
    padding: 5px 15px;
    margin-left: 0px;
    font-size: 22px;
  }
}

@media only screen and (max-width: 600px) {
  ul {
    padding-left: 10px;
    padding-right: 10px;
  }
  .portfolio-menu ul li {
    padding: 5px 10px;
    margin-left: 0px;
    font-size: 13px;
  }
}