Biotech.css

*{
    margin: 0;
    padding: 0;
}
.header{
    min-height: 100vh;
    width: 100%;
    background-image: linear-gradient(rgba(4,9,30,0.7),rgba(4,9,30,0.7)),url(images/b1.png);
    background-position:center;
    background-size:cover;
    position: relative;
}
nav{
    display: flex;
    padding: 2% 6%;
    justify-content: space-between;
    align-items: center;
}
nav img{
    width: 150px;
}
.nav-links{ 
    flex: 1;
    text-align: right;
}
.nav-links ul li{
    list-style: none;
    display:inline-block;
    padding: 8px 12px;
    position: relative;
}
.nav-links ul li a{
    color: #fff;
    text-decoration: none;
    font-size: 13px;
}
.nav-links ul li::after{
    content:'';
    width:0%;
    height:2px;
    background:#fff;
    display:block;
    margin:auto;
    transition: 0.5s;
}
.nav-links ul li:hover::after{
    width: 100%;
}

.container{
    width: 100%;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;

}
h1{
    color: rgb(255, 255, 255);
    margin-bottom: 20px;
}
iframe{
    width: 80%;
    height: 400px;
}
p{
    margin: 15px 0 15px;
    font-size: 16px;
    color: #fff;
}



nav .fa{
    display: none;
}
@media(max-width: 700px){
    .text-box h1{
        font-size: 30px;
    }
    .nav-links ul li{
        display: block;
    }
    .nav-links{
        position: absolute;
        background: #f44336;
        height: 100vh;
        width: 200px;
        top: 0;
        right: -200px;
        text-align: left;
        z-index: 2;
        transition: 1s;
    }

    nav .fa{
        display: block;
        color: #fff;
        margin: 10px;
        font-size: 22px;
        cursor: pointer;
    }
    .nav-links ul{
        padding: 30px;
    }
}