.article__container {
  width: 60%;
  margin: 0 auto;
  padding: 4rem;
}
.hidden {
  display: none;
}

@keyframes move {
  0% {
    transform: translateY(15px);
    opacity: 0;
  }
  100% {
    transform: translateY(0px);
    opacity: 1;
  }
}
/* main__section */
header {
  background-color: #171616;
}

/* about */
.about {
  background-image: url(./imgs/1920x1300.jpeg);
  background-size: cover;
  background-position: bottom;
  text-align: center;
  padding: 5rem 0;
}
.about h1 {
  font-size: 4.5rem;
  font-weight: 500;
  color: #fff;
}
.about p {
  padding: 2rem;
  font-size: 2rem;
  color: #fff;
}

/* who__am__i */
.who__am__i {
  padding: 4rem;
}
.who__am__card,
.how__start__card {
  width: 50%;
  float: left;
  padding: 4rem;
}
.how__start__card {
  padding: 5rem;
}
.who__am__card__left,
.how__start__card__left {
  padding-left: 0;
}

.who__am__card h2 {
  font-size: 3rem;
  font-weight: 400;
  color: #fff;
}
.who__am__card p,
.how__start__card p {
  font-size: 1.6rem;
  color: #999;
  margin-bottom: 2rem;
  margin-top: 1rem;
}
.who__am__card span,
.how__start__card span {
  display: inline-block;
  height: 0.07rem;
  background-color: #383838;
  margin: 2rem 0;
  width: 5%;
}
.How__did__I__start {
  background-color: #1d1d1d;
  padding: 3rem 0;
}

.how__start__card h2 {
  font-size: 3rem;
  font-weight: 400;
  padding-top: 3rem;
  margin-top: 3rem;
  color: #fff;
}
.how__start__card p {
  margin-bottom: 3rem;
  margin-top: 2rem;
}
.about__icons {
  padding: 6rem 0;
  background-color: #161616;
}
.icon__card {
  width: calc((100% - 90px) / 4);
  text-align: center;
  float: left;
}
.icon__card:not(:last-child) {
  margin-right: 30px;
}
.icons {
  width: 8rem;
  height: 8rem;
  border-radius: 50%;
  background-color: #333333;
  text-align: center;
  margin: 0 auto;
}
.icons span {
  font-size: 3.5rem;
  line-height: 70px;
  color: #fff;
  margin-top: 0.5rem;
}
.icon__title {
  font-size: 1.7rem;
  margin: 1.5rem 0;
  color: #fff;
}
.icon__description {
  color: #888;
  font-size: 1.4rem;
}
.our__goal {
  background-color: #1d1d1d;
  padding: 4rem 0;
}
.our__goal__header {
  width: 40%;
  margin: 3rem auto;
  text-align: center;
}
.our__goal__header a {
  text-decoration: none;
  font-size: 1.4rem;
  color: #888;
  padding: 1.2rem 1.7rem;
  background-color: rgba(0, 0, 0, 0.12);
  transition: all 1s;
}
.our__goal__header :hover {
  color: #5b5959;
  background-color: rgba(0, 0, 0, 0.232);
}
.our__goal__header a:not(:last-child) {
  margin-right: 1rem;
}
.active-tab {
  background-color: #333333 !important;
  color: #fff !important;
}

.our__goal__card {
  width: 50%;
  float: left;
  color: #999;
  padding: 5rem;
  font-size: 1.4rem;
  line-height: 1.9;
}

@media screen and (max-width: 1200px) {
  .who__am__i {
    padding: 4rem 2rem;
  }
  .who__am__card,
  .how__start__card {
    padding: 2rem;
  }
  .how__start__card h2 {
    font-weight: 400;
    padding-top: 1rem;
    margin-top: 1rem;
  }
  .who__am__card p,
  .how__start__card p {
    margin-bottom: 0.8rem;
  }
  .who__am__card span,
  .how__start__card span {
    margin: 0;
  }
  .our__goal__card {
    padding: 3rem 2rem;
  }
}

@media screen and (max-width: 992px) {
  .who__am__i {
    padding: 4rem 1rem;
  }
  .who__am__card,
  .how__start__card {
    padding: 1rem;
  }
  .who__am__card p,
  .how__start__card p {
    margin-bottom: 0;
    margin-top: 0;
    font-size: 1.5rem;
  }

  .who__am__card img,
  .how__start__card img {
    margin-top: 3rem;
  }
  .our__goal .container {
    width: 95%;
  }
  .our__goal__header {
    width: 60%;
  }
  .our__goal__card {
    padding: 2rem 1rem;
  }
}

@media screen and (max-width: 768px) {
  .who__am__card,
  .how__start__card {
    width: 100%;
  }
  .our__goal__header {
    width: 80%;
  }
  .our__goal__card {
    width: 100%;
    padding: 2rem;
    text-align: center;
  }

  .icon__card {
    width: calc((100% - 30px) / 2);
    margin-right: 0 !important;
    margin-top: 2rem;
  }

  .icon__card:nth-child(1),
  .icon__card:nth-child(3) {
    margin-right: 30px !important;
  }
}
@media screen and (max-width: 481px) {
  .icon__card:nth-child(1),
  .icon__card:nth-child(3) {
    margin-right: auto !important;
  }
  .icon__card {
    float: none;
    display: block;
    width: 80%;
    margin-right: auto !important;
    margin-left: auto !important;
    margin-top: 3rem;
  }
  .icons span {
    font-size: 2.8rem;
  }
  .our__goal__header {
    width: 100%;
    margin: 3rem auto;
    /* text-align: center; */
  }
  .our__goal__header a {
    text-decoration: none;
    font-size: 1.4rem;
    color: #888;
    padding: 1.2rem 1.5rem;
  }
  .our__goal__header a:not(:last-child) {
    margin-right: 0.5rem;
  }
}