@media screen and (max-width: 340px) {
  .about__title {
    padding-top: 1.5em;
  }
  /*** Navigation ***/
  .nav-menu__list {
    margin-left: -1em;
  }
  .nav-menu__text,
  .nav-menu__email {
    margin-left: 1.5em;
    font-size: 1em;
  }
  .nav-menu__separator {
    width: 82%;
  }
  .nav-menu__social-btn {
    margin-left: 1em;
  }
  .nav-menu .fa-2x {
    font-size: 1.9em;
  }
  /*** Header ***/
  .header {
    height: 450px;
  }
  .header__title {
    padding: 5px 10px;
    font-size: 2em;
    line-height: 1em;
  }
  .header__subtitle {
    width: 240px;
    top: 8em;
    font-size: 1.3em;
  }
  .header__btn {
    width: 180px;
    font-size: 1.1em;
    bottom: 7em;
  }
  /*** Main ***/
  .main-container {
    top: 0;
    overflow-x: hidden;
  }
  /*** About ***/
  .about__title,
  .portfolio__title,
  .contact__title {
    font-size: 2em;
  }
  .about__info__container {
    -webkit-box-orient: vertical;
    -webkit-box-direction: normal;
        -ms-flex-direction: column;
            flex-direction: column;
    padding-left: 0.5em;
    padding-right: 0.5em;
  }
  .about__title {
    -webkit-box-ordinal-group: 2;
        -ms-flex-order: 1;
            order: 1;
  }
  .about__img__container {
    background-color: rgb(142, 151, 240);
    max-width: 100%;
    margin-left: 0.5em;
    margin-right: 0.5em;
    -webkit-box-ordinal-group: 3;
        -ms-flex-order: 2;
            order: 2;
  }
  .about__img {
    box-sizing: border-box;
    margin: 0 auto;
    width: 100%;
    -webkit-box-ordinal-group: 3;
        -ms-flex-order: 2;
            order: 2;
    border-radius: 0;
  }
  .about__img__mobile {
    display: none;
  }
  .about__text {
    margin-left: 0.5em;
    margin-right: 0.5em;
    min-width: 200px;
    -webkit-box-ordinal-group: 4;
        -ms-flex-order: 3;
            order: 3;
    padding: 1em 1.5em 0;
    border-left: none;
  }
  .about__text__description:first-of-type {
    margin-top: 0.5em;
    padding-bottom: 0.8em;
    font-size: 1.3em;
    font-weight: 400;
    border-bottom: 1px solid #fff;
  }
  .about__text__description:last-of-type {
     font-size: 1.1em;
   }
   .about__btn {
     padding-bottom: 2px;
   }
   /*** Portfolio ***/
  .portfolio {
    padding-left: 0.5em;
    padding-right: 0.5em;
  }
  .portfolio__description {
    max-width: 90%;
    font-size: 1.2em;
  }
  .portfolio__nav__container {
    margin-left: 0.5em;
    margin-right: 0.5em;
    padding: 1em 0;
  }
  .portfolio__nav__btn {
    width: 116px;
    margin: 0.5em 0.3em;
    font-size: 1em;
  }
  .portfolio__nav__btn:before,
  .portfolio__nav__btn:after  {
    width: 116px;
  }
  .portfolio__items-container {
    min-height: auto;
  }
  .portfolio__item__info {
    font-size: 1.2em;
  }
  .portfolio__item__hover__title {
    margin-top: 0em;
    font-size: 1.8em;
  }
  .portfolio__item__hover__description {
    font-size: 1.2em;
  }
  .portfolio__item__hover__base-info {
    font-size: 1em;
  }
  .portfolio__item__hover:before {
    top: 1.5em;
    left: 1em;
  }
  .portfolio__item__hover:after {
    bottom: 4em;
    right: 1em;
  }
  .portfolio__item:hover .portfolio__item__hover:before,
  .portfolio__item:hover .portfolio__item__hover:after {
    width: 80%;
    height: 55%;
  }
  /*** Contact ***/
  .contact {
    padding-bottom: 2em;
    overflow-x: hidden;
  }
  .contact__envelope {
    background-image: url(../images/envelope.svg);
    background-size: 300px;
    height: 380px;
    background-position: 75% 15%;
    background-repeat: no-repeat;
  }
  .contact__description {
    max-width: 90%;
    font-size: 1.2em;
    text-align: center;
  }
  .contact__link {
    font-size: 1.4em;
  }
  .contact__social-btn__container {
    margin-left: -0.1em;
    width: 340px;
  }
  .contact__social-btn {
    margin-left: -1.6em;
    width: 20px;
    height: 18px;
  }
  .contact__social-btn__container .fa.fa-twitter,
  .contact__social-btn__container .fa.fa-codepen,
  .contact__social-btn__container .fa.fa-github,
  .contact__social-btn__container .fa.fa-youtube,
  .contact__social-btn__container .fa.fa-linkedin-square {
    top: -0.7em;
    left: 0.75em;
  }
  .contact__social-btn__container .fa.fa-codepen {
    left: 1em;
  }
  .contact__social-btn__container .fa.fa-codepen {
    left: 0.85em;
  }
  .contact__social-btn__container .fa-2x {
    font-size: 1.3em;
  }
  /*** Footer ***/
  .footer {
    top: 0;
    height: 150px;
  }
  .footer__info__container {
    margin: 1.5em 1em 1em;
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex;
    -webkit-box-orient: vertical;
    -webkit-box-direction: normal;
        -ms-flex-direction: column;
            flex-direction: column;
  }
  .footer__copyright {
    -webkit-box-flex: 4;
        -ms-flex: 4;
            flex: 4
  }
  .footer-menu__list {
    -webkit-box-flex: 4;
        -ms-flex: 4;
            flex: 4;
  }
  .footer__social-btn {
    -webkit-box-flex: 5;
        -ms-flex: 5;
            flex: 5;
  }
}