*{
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
.header{
  position: relative;
  width: 100%;
  height: 80vh;
  background: url(bg.jpg);
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  display: flex;
  justify-content: center;
  align-items: center;
}
.header #text{
  position: relative;
  font-size: 12em;
  color: #fff;
  transition: .3s;
}
@media(max-width:767px){
  .header #text{
    font-size: 6em;
  }
}
.header .clouds{
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  pointer-events: none;
}
.header .clouds img{
  position: absolute;
  bottom: 0;
  max-width: 100%;
  animation: animate calc(10s * var(--i)) linear infinite;
}

@keyframes animate{
  0%{
    transform: translateX(-100%);
  }

  100%{
    transform: translateX(100%);
  }
}

section{
  position: relative;
  padding: 75px 100px
}
section h2{
  position: relative;
  font-size: 2.5em;
  margin-bottom: 20px;
}