.portfolio {
  position: relative;
  margin: 10px 10px;
  float: left;
  width: 248px;
  transition-duration: 0.4s;
  animation: winanim 0.5s;
  -webkit-backface-visibility: visible;
  backface-visibility: visible;
  box-shadow: 0 3px 5px -1px rgba(0, 0, 0, .2), 0 5px 8px 0 rgba(0, 0, 0, .14), 0 1px 14px 0 rgba(0, 0, 0, .12);
}

.portfolio:hover {
  box-shadow: 0 12px 16px 0 rgba(0, 0, 0, .24), 0 17px 50px 0 rgba(0, 0, 0, .19);
}

.portfolio img {
  width: 100%;
  height: auto;
  border-radius: 5px
}

.desc {
  padding: 10px 5px;
  text-align: center;
  font-size: 90%;
  background: #fff;
  color: #000;
  text-transform: capitalize;
  font-style: italic;
  font-weight: bold;
}

.nav {
  text-align: center;
  margin: 0 auto;
  padding-bottom: 3em;
}

.nav li a {
  margin: 5px;
  padding: 8px 34px;
  font-size: 15px;
  color: #1e2d3a;
  font-weight: 600;
  border: 1px solid #1e2d3a;
  box-sizing: content-box;
  transition-duration: 0.4s;
}

.nav a:hover {
  background: #1e2d3a !important;
  color: #fff;
}

.nav .active {
  background-color: #1e2d3a !important;
  border: 1px solid #1e2d3a;
  color: #fff;
}

@keyframes winanim {
  0% {
    opacity: 0;
    transform: scale3d(.3, .3, .3)
  }

  50% {
    opacity: 1
  }
}

/* //portfolio */

@media screen and (max-width: 1080px) {
  .portfolio {
    width: 280px;
  }
}

@media screen and (max-width: 991px) {
  .portfolio {
    width: 200px;
  }

}

@media screen and (max-width: 736px) {
  .nav li a {
    padding: 5px 28px;
    font-size: 14px;
  }
}

@media screen and (max-width: 736px) {

  .portfolio {
    width: 220px;
  }
}

@media screen and (max-width: 568px) {
  .nav {
    padding-bottom: 2em;
  }
}

@media screen and (max-width: 480px) {
  .nav li a {
    padding: 5px 24px;
    font-size: 13px;
  }

  .portfolio {
    width: 181px;
  }
}

@media screen and (max-width: 414px) {
  .nav li a {
    padding: 5px 19px;
    font-size: 14px;
  }

  .portfolio {
    width: 148px;
  }
}

@media screen and (max-width: 384px) {
  .portfolio {
    width: 93%;
    float: none;
  }

  .nav {
    padding-bottom: 1.5em;
  }

  .nav li a {
    padding: 5px 16px;
    font-size: 13px;
  }
}

@media screen and (max-width: 375px) {
  .nav li a {
    padding: 5px 15px;
  }
}

@media screen and (max-width: 320px) {
  .nav li a {
    padding: 3px 11px;
  }
}