intro.css

*{
    margin: 0;
    padding: 0;
    font-family: sans-serif;
}
.hero{
    position: relative;
    width: 100%;
    height: 100vh;
    background: #fff;
}
.logo{
    position: relative;
    font-size: 50px;
    color: black;
    text-decoration: none;
    font-weight: 600;
}
nav{
    display: flex;
    width: 84%;
    margin: auto;
    padding: 20px;
    align-items: center;
    justify-content: space-between;
}
nav ul li{
    display: inline-block;
    list-style: none;
    margin: 10px 20px;
}nav ul li a{
    text-decoration: none;
    color: #000;
    font-weight: bold;
}
nav ul li a:hover{
    color: red;
}
.detel{
    margin-left: 8%;
    margin-top: 13%;
}
.detel h1{
    font-size: 50px;
    color: #212121;
    margin-bottom: 20px;
}
span{
    color: orange;
}
.detel p{
    color: #555;
    line-height: 22px;
    font-size: 20px;

}
.detel a{
    background: #212121;
    padding: 10px 18px;
    text-decoration: none;
    font-weight: bold;
    color: #fff;
    display: inline-block;
    margin: 30px 0;
    border-radius: 5px;
}
.images{
    width: 45%;
    height: 80%;
    position: absolute;
    bottom: 0;
    right: 100px;
}
.images img{
    height: 80%;
    position: relative;
    left: 50%;
    bottom: 0;
    transform: translateX(-50%);
    transition: bottom 1s, left 1s;
}
.images:hover .shape{
    bottom: 40px;    
}
.images:hover .girl{
    left: 45%;
}
.home-sci a{
    display: inline-flex;
    justify-content: center;
    align-items: center;
    width: 40px;
    height: 40px;
    background: transparent;
    border: 2px solid black;
    border-radius: 50%;
    font-size: 40px;
    color: black;
    text-decoration: none;
    margin: 40px 15px 30px 0;
}
.home-sci a:hover{
    background-color: black;
    color: yellowgreen;
    box-shadow: 0 0 30px black;
}
.btn-box{
    display: inline-block;
    padding: 12px 28px;
    background: black;
    border-radius: 40px;
    font-size: 16px;
    color: orange;
    letter-spacing: 1px;
    text-decoration: none;
    font-weight: 600;

}
.btn-box:hover{
    box-shadow: 0 0 5px black, 
    0 0 25px black, 0 0 black,
    0 0 100px black, 0 0 200px black;

}