.sub-header {
  height: 50vh;
  width: 100%;
  background-image: linear-gradient(to left top, hsla(0, 0%, 0%, 0.6), hsla(56, 94%, 48%, 0.6)),
  url(/images/img.jpg);
  background-position: center;
  background-size: cover;
  text-align: center;
  color: hsl(0, 0%, 100%);
}


.about-sec {
  font-family: sans-serif;
font-size: 16px;
height: 800px;
max-width: 850px;
display: grid;
grid-template-areas: 
'top top right'
'left bottom bottom'
;
margin: 100px auto;
grid-template-columns: 3fr 1fr 3fr;;
grid-template-rows: 1fr 1fr;
}

.topLeft {
  grid-area: top;
  padding: 100px 20px 0;
  background: #032D3C;
  color: white;
}
.topRight {
  grid-area: right;
  position: relative;
}
.bottomLeft {
  grid-area: left;
  position: relative;
}
.bottomRight {
  grid-area: bottom;
  background: #4BE3AC;
  padding: 100px 20px 0;
  color: white;
}

.topRight img, .bottomLeft img {
  position: absolute;
  height: 400px;
  bottom: 0;
  left: 0;
  width: 100%;
}

.about-sec h3 {
  margin-bottom: 30px;
}

.about-sec p {
  line-height: 1.3;
  letter-spacing: 1.2px;
}