*{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    list-style: none;
    text-decoration: none;
}

body{
    background: white;
    background-image: url('https://wallpapercave.com/uwp/uwp3536518.jpeg');
    background-size: cover;
}

.topic{
    text-align: center;
    font-family: sans-serif;
    font-variant: small-caps;
    text-decoration: solid;
    text-shadow: 4px 1px 3px green;
    color: white;
}


.about{
    text-align: center;
}

.about .b1{
    border: 1px solid black;
    width: 300px;
    margin: 1rem auto;
    height: 50vh;
    background: whitesmoke;
    color: black;
    border: none;
    padding: 2rem;
    border-radius: 2rem;


}

.b1:hover{
    background: green;
    color: white;
    font-style: oblique;
    transition: 0.5s;
}

.about .b1 h1{
    font-size: 1rem;
    font-family: Arial, Helvetica, sans-serif;
}

.about .b1 h2{
    font-size: 1.2rem;
    font-style: oblique;
    font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;

}



.about .b2{
    border: 1px solid black;
    width: 300px;
    margin: 1rem auto;
    height: 40vh;
    background: whitesmoke;
    color: black;
    border: none;
    padding: 2rem;
    border-radius: 2rem;


}

.about .b2 h1{
    font-size: 1rem;
    font-family: Arial, Helvetica, sans-serif;
}

.about .b2 h2{
    font-size: 1.2rem;
    font-style: oblique;
}

.b2:hover{
    background: green;
    color: white;
    font-style: oblique;
    transition: 0.5s;
}







.about .b3{
    border: 1px solid black;
    width: 300px;
    margin: 1rem auto;
    height: 40vh;
    background: whitesmoke;
    color: black;
    border: none;
    padding: 2rem;
    border-radius: 2rem;

}

.about .b3 h1{
    font-size: 1rem;
    font-family: Arial, Helvetica, sans-serif;
}

.about .b3 h2{
    font-size: 1.2rem;
    font-style: oblique;
}

.b3:hover{
    background: green;
    color: white;
    font-style: oblique;
    transition: 0.5s;
}