*{
    padding: 0;
    margin: 0;
    font-family: sans-serif;
}
.main{
    width: 100%;
    background: linear-gradient(to top, rgba(4,9,30,0.7),rgba(4,9,30,0.7)),url(img/banner.png);
    background-position: center;
    background-size: cover;
    height: 100vh;
}
.navbar{
    width: 1200px;
    height: 75px;
    margin: auto;
}
.icon{
    width: 200px;
    float: left;
    height: 70px;
    padding-top: 30px;
}
.navlink{
    width: 100px;
    float: right;
    height: 70px;
}
.logo img{
    max-width: 150px;
}
.menu{
    width: 400px;
    float: right;
    height: 70px;
}
ul{
    float: right;
    display: flex;
    justify-content: center;
    align-items: center;
}
.menu ul li{
    margin-top: 40px;
    margin-left: 60px;
    list-style: none;
    font-size: 15px;
    position: relative;
}
ul li a{
    text-decoration: none;
    font-weight: bold;
    font-style: arial;
    color: white;
    transition: 0.4s;
}
ul li::after{
    content: '';
    height: 3px;
    width: 0;
    background: #f44336;
    position: absolute;
    left: 0;
    bottom: -10px;
    transition: 0.5s;
}
ul li:hover:after{
    width: 100%;
}
.content{
    position: absolute;
    top: 50%;
    text-align: center;
    transform: translateY(-50%);
    width: 90%;
    color: white;
}
h1{
    font-size: 50px;
    margin-top: 80px;
}
p{
    margin: 20px auto;
    font-weight: 100;
    line-height: 25px;
}
button{
    width: 200px;
    padding: 15px 0;
    text-align: center;
    margin: 20px 10px;
    border-radius: 15px;
    font-weight: bold;
    border: 2px solid white;
    background: transparent;
    color: #fff;
    cursor: pointer;
    position: relative;
    overflow: hidden;
}
span{
    background: #f44336;
    height: 100%;
    width: 0;
    border-radius: 25px;
    position: absolute;
    left: 0;
    bottom: 0;
    z-index: -1;
    transition: 0.5s;
}
button:hover span{
    width: 100%;
}
button:hover{
    border: none;
}
@media(max-width: 700px){
    h1{
        font-size: 20px;
    }
    .menu ul li{
        display: block;
    }
    .menu{
        position: absolute;
        background: #f44336;
        height: 100vh;
        width: 200px;
        top: 0;
        right: 0;
        text-align: left;
        z-index: 2;
    }
}