*{
    margin: 0;
    padding:0;
    font-family: sans-serif;

}

.hero{
    width:100%;
    height: 100vh;
    background-image: url(https://images.unsplash.com/photo-1497294815431-9365093b7331?ixid=MnwxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8&ixlib=rb-1.2.1&auto=format&fit=crop&w=750&q=80);
    background-size:cover;
    background-position: center;
    position:relative;
    overflow: hidden;
}

.logo {
    width: 200px;
    cursor: pointer;
    
}

.navbar{
    width:85%;
    height:15%;
    margin:auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

button{
    color: #fbfbfb;
    padding: 10px 25px;
    background: transparent;
    border:1px solid #fff;
    border-radius: 20px;
    outline:none;
    cursor: pointer;
}

.content{
    color: #fbfcfd;
    position: absolute;
    top: 50%;
    left:8%;
    transform: translateY(-50%);
    z-index: 2;
}

h1 {
    font-family: fantasy;
    font-size: 80px;
    margin: 10px 0 30px;
    line-height: 80px;
}

.side-bar {
    width: 50px;
    height: 100vh;
    background:linear linear-gradient(#00545d, #000729);
    position: absolute;
    right: 0;
    top: 0;
}

.menu{
    display: block;
    width: 25px;
    margin: 40px auto 0;
    cursor: pointer;
}

.social-links img, .useful-links img {
    width: 25px;
    margin:5px auto;
    cursor:pointer;
}

.social-links{
    width: 50px;
    text-align:center;
    position: absolute;
    top:50%;
    transform: translateY(-50%)
}

.useful-links{
    width: 50px;
    text-align:center;
    position: absolute;
    bottom:30px;
}

.stars img{
    animation: star 7s linear infinite;

}

.stars {
    width: 100%;
    display:flex;
    align-items: center;
    justify-content: space-around;
    position: absolute;
    bottom: -70px;
}

@keyframes star{
    0%{
        transform: translateY(0);
        opacity: 0;
    }
    50%{
        opacity: 1;
    } 
    70%{
        opacity: 1;
    }
     100%{
        transform: translateY(-80vh);
        opacity: 0;
    }
     
}
.stars img:nth-child(1){
    animation-delay: 2s;
    width: 25px;
}
.stars img:nth-child(2){
    animation-delay: 1s;

}
.stars img:nth-child(3){
    animation-delay: 3s;
    width: 20px;
}
.stars img:nth-child(4){
    animation-delay: 4.5s;
    width: 35px;
}
.stars img:nth-child(5){
    animation-delay: 3s;
    width: 15px;
}
.stars img:nth-child(6){
    animation-delay: 6s;
}
.stars img:nth-child(7){
    animation-delay: 7s;
    width: 27px;
}