@media (max-width: 768px) {
  header {
    /* position: sticky; */
    z-index: 9999;
    /* top: 0; */
    position: fixed;
    top: 0;
    width: 100%;
  }
  
  header #logo-img {
    width: 80px;
  }

  header .nav {
    min-height: 62px;
    display: none;
    position: absolute;
    top: 62px;
    right: 0;
    width: 100%;
    padding: 0;
    background: var(--darkBlueColor);
    transform: translate(0, -130%);
    transition: 300ms;
    z-index: 10;
    opacity: 0;
  }

  header .nav_open {
    opacity: 100%;
    transform: translate(0, 0);
  }

  header .container .row ul li {
    padding: 12px 0;
    text-align: center;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: none;
  }

  header .d-flex li:hover {
    background: var(--blueColor);
    transform: none;
  }

  header .nav a:hover::after {
    width: 100%;
  }

  header .burger {
    display: block;
  }

  main .container {
    padding-top: 3rem;
  }

  .strip .container .box {
    width: 45%;
  }

  .strip .container .box:nth-child(3) h4 {
    font-size: 18px;
  }
  section .container {
    padding-top: 2rem;
  }
  section .row .project,
  section .row .project-github {
    height: 320px;
    width: 320px;
  }

  /* article */
  article .container {
    padding-top: 2rem;
  }
  article .container .box .screenshot,
  article .container .box .screenshotThird {
    width: 80%;
  }
}

@media (max-width: 991px) {
  .strip .container .box {
    width: 40%;
  }
}