body{
    background-image: url("background.jpg");
    background-size: cover;
    background-attachment: fixed;
}
*{
    padding: 0;
    margin: 0;
    text-decoration: none;
    list-style: none;
    box-sizing: border-box;
}
nav{
    height: 80px;
    margin-top: 20px;
    background-color: rgba(244, 162, 255, 0.5);
}
label.logo{
    font-size: 3vw;
    line-height: 80px;
    padding: 0 100px;
    font-weight: bold;
    color: white;
}
nav ul{
    float: right;
    margin-right: 50px;
    margin-top: 30px;
    
}
nav ul li{
    display: inline-block;
    line height: 80px;
    margin: 0 30px;
    position: relative;
}
nav ul li a{
    font-size: 2vw;
    text-transform: uppercase;
    font-weight: bold;
    color: white;
}
nav ul li:after{
    content: '';
    height: 3px;
    width: 0%;
    background: #009688;
    position: absolute;
    left: 0;
    bottom: 0px;
    transition: 0.5s;

}
nav ul li:hover:after{
    width: 100%;
}
.banner{
    width: 100%;
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    text-align: center;
    color: white;

}
.banner h1{
    font-size: 70px;
    magrin-top: 80px;

}
.banner p {
    font-size: 30px;
    margin: 20px auto;
    font weight: 100;
    line-height: 25px;
}
#btn1{
    font-family: 'Times New Roman', Times, serif;
    font-weight: bold;
    width: 200px;
    height: 50px;
    border: none;
    color: white;
    background-color: crimson;
    border-radius: 4px;
    font-size: 20px;
    letter-spacing: 4px;
    box-shadow: inset 0 0 0 0 yellow;
    transition: ease-out 0.5s;
    outline: none;
}
#btn1:hover{
    box-shadow: inset 300px 0 0 0 yellow;
    cursor: pointer;
    color: black;

}