style.css

*{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'poppins',sans-serif;
}
.header{
    width: 100%;
    height: 100vh;
 background-image: url(background.png);
    background-position: center;
    color: #fff;
    padding: 0 7%;
    position: relative;
}
nav{
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 30px 0 10px;
}
nav ul li{
    display: inline-block;
    list-style: none;
    margin: 10px 30px;
}
.logo{
    width: 160px;
    cursor: pointer;
}
nav ul li a{
    text-decoration: none;
    color: white;
    font-size: 17px;
    letter-spacing: 1px;
}
nav ul li a :hover{
    color: #ff3e3b;
}
.text-box{
    margin-top: 16%;
    font-size: 22px;
}
.text-box h1{
    font-weight: 600;
    line-height: 100px;
    margin-bottom: 10px;
    font-size: 85px;
}
.text-box .btn{
    outline: none;
    border: none;
    font-size: 16px;
    margin-top: 30px;
    background: #ff3e3b;
    color: white;
    padding: 14px 40px;
    cursor: pointer;
}
.download{
    position: absolute;
    right: 7%;
    bottom: 60px;
    display: flex;
    align-items: center;
    text-decoration: none;
    color: white;
    padding: 20px 40px;
    border-radius: 40px;
    transition: background 0.3s;
    
}
.download img{
    width: 25px;
    margin-left: 15px;
    animation: move 2s linear infinite;
}
@keyframes move{
    0%{
    transform: translateY(-10px);
}
50%{
    transform: translateY(10px);
}
100%{
    transform: translateY(-10px);
}
}
.download:hover{
    background: #ff3e3b;

}