.about-header {
  background-color: #171f20;
}

/* Section developers */
.section_developers {
  background-color:#171f20;
  padding: 0;
  color: #fff;
}

.about-headline {
  width: 75%;
  font-size: 65px;
  font-weight: 600;
  line-height: 75px;
  padding-top: 10px;
  padding-bottom: 10px;
}

.developers {
  display: flex;  
  flex-wrap: wrap;
  justify-content: space-between;
  padding: 10px ;
  background: #171f20;
}

.developers .box,
.developers .box2 {
  flex-basis: calc(50% - 20px);
  background: transparent;
  color: #fff;
  border-radius: 10px;
  margin: 10px;
  padding: 15px 20px;
  text-align: center;
}

.section_container_buttons_developers {
  display: flex;
  justify-content: center;
  align-items: center;
  flex-wrap:wrap;
  padding: 0px 0px;
  margin: 0px 0px;
}

.btn_developers {
  padding: 10px 20px;
  margin: 10px 10px 10px 10px;
  color: black;
  border-radius: 5px;
  text-decoration: none;
  font-size: 12px;
  background-color: #fff;
  border: 2px solid  #c5c8d9;
}

.btn_developers:hover {
  color: #fff;
  background-color: #c5c8d9;
  border: 2px solid #c5c8d9;
  text-decoration: none;
}

@media (max-width: 768px) {
  .about-headline {
    font-size: 40px;
    line-height: 50px;
  }

  .developers .box,
  .developers .box2 {
    flex-basis: calc(100% - 20px);
  }

  .section_container_buttons_developers {
    flex-direction: column;
    align-items: center;
  }

  .btn_developers {
    font-size: 14px;
    padding: 8px 16px;
    margin: 8px;
  }
}