HTMLify

@import url("https://fonts.googleapis.com/css2?family=Fredoka:wght@300..700&family=Martel+Sans:wght@200;300;400;600;700;800;900&family=Roboto:ital,wght@0,300;0,400;0,700;1,300;1,400;1,700&display=swap");
* {
  margin: 0;
  padding: 0;
  font-family: "Poppins", sans-serif;
}
body {
  background-color: black;
}
.main {
  background-image: url("images/background.jpg");
  background-position: center center;
  background-size: max(1200px, 100vw);
  position: relative;
  background-repeat: no-repeat;
  height: 644px;
}
.main .box {
  background-color: black;
  height: 644px;
  width: 100%;
  opacity: 0.70;
  position: absolute;
  top: 0;
}
nav {
  max-width: 70vw;
  justify-content: space-between;
  margin: auto;
  display: flex;
  align-items: center;
  height: 100px;
}
nav img {
  color: red;
  width: 120px;
  position: relative;
  z-index: 10;
}
nav button {
  position: relative;
  z-index: 10;
}
.center {
  color: white;
  height: calc(100% - 100px);
  display: flex;
  align-items: center;
  padding:0 30px;
  justify-content: center;
  flex-direction: column;
  position: relative;
  gap: 20px;
  font-family: "Martel Sans", sans-serif;
}
.center > :nth-child(1) {
  font-family: "Poppins", sans-serif;
  font-weight: bolder;
  font-size: 48px;
  text-align: center;
}
.center > :nth-child(2) {
  font-weight: 400;
  font-size: 24px;
  text-align: center;
}
.center > :nth-child(3) {
  font-weight: 400;
  font-size: 20px;
  text-align: center;
}
.seprate{
    height: 7px;
    background-color: rgb(48, 46, 46);
    position: relative;
    z-index: 20;
}
.btn{
  padding:3px 8px;
  font-weight: bold;
  font-weight: 400;
  background-color: rgba(248,243,243,0.0021);
  color: white;
  border: 1px solid white;
  border-radius: 4px;
  cursor: pointer;
}
.main input{
  background-color: rgba(23,23,23,0.8);
  padding: 3px 24px;
  font-size: 20px;
  color: white;
  border-radius: 4px;
  border: 1px solid rgba(23,23,23,0.5);
}
.btn-log{
  background-color: red;
  color: white;
}
.btn-red{
  background-color: red;
  color: white;
  padding: 3px 24px;
  font-size: 20px;
  border-radius: 4px;
  font-weight: 400;
}
.cen-btn{
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
}
.main input{
  padding: 7px 101px 8px 14px;
  font-size: 12px;
  color: white;
  font-weight: 900;
  background-color: rgba(23,23,23,0.8);
  border: 1px solid rgba(246,238,238,0.5);
}
.first{
  display: flex;
  justify-content: center;
  color: white;
  max-width: 70vw;
  margin: auto;
  align-items: center;
}
.img{
  position: relative;
}
.img img{
  position: relative;
  width: 500px;
  z-index: 10;
}
.img video{
  position: absolute;
  top: 51px;
  right: 0;
  width: 500px;
}
section.first>div {
  display: flex;
  flex-direction: column;
  padding: 34px 0;
}
section.first>div :nth-child(1) {
  font-size: 50px;
  font-weight: bolder;
}
section.first>div :nth-child(2) {
  font-size: 25px;
  padding-top: 20px;
}