* {
    text-decoration: none;
}
li {
    border: 2px solid blue;
    box-shadow: 1px 3px 3px 1px blue;
    padding: 5px 10px;
    display: inline-block;
    margin: 0 20px;
}
ul {
    font-size: 20px;
    margin: 0 auto;
    display: flex;
    justify-content: center;
}
.buttons-container {
    display: flex;
    justify-content: flex-end;
    align-items: center;
    margin-top: 20px;
    margin-right: 40px;
}
.btn1, .btn2 {
    border-radius: 15px;
    padding: 10px 35px;
    margin: 0 10px;
}
.btn1 {
    border-color: greenyellow;
    background-color: greenyellow;
    color: green;
}
.btn2 {
    border-color: rgb(91, 91, 241);
    background-color: white;
    color: rgb(91, 91, 241);
}
.img-a {
    margin: 0 auto;
}
.center {
    margin: 100px auto;
    text-align: center;
}
h1 {
    font-size: 50px;
}
.p1 {
    font-size: 20px;
    text-align: center;
    margin: 0 auto;
}
.img-center {
    margin: 50px auto;
    text-align: center;
}
.bio {
    text-align: center;
    background-color: rgb(158, 39, 243);
    height: 600px;
    width: 100%;
    color: white;
}
.p2 {
    font-size: 20px;
    margin: 100px 80px;
}
.btn1:hover{
    transform: scale(1.10);
    background-color: green;
    color: white;
}
.btn2:hover{
    transform: scale(1.10);
    background-color: blue;
    color: white;
}

@media (max-width: 768px) {
    li {
        margin-left: 40px;
    }
    ul {
        font-size: 18px;
        flex-direction: column;
        align-items: center;
    }
    .buttons-container {
        justify-content: center;
        margin-right: 0;
        margin-top: 40px;
    }
    .btn1, .btn2 {
        margin: 10px auto;
        display: block;
    }
    .bio {
        height: auto;
    }
    .p2 {
        margin: 50px 40px;
    }
}

@media (max-width: 480px) {
    h1 {
        font-size: 40px;
    }
    .p1 {
        font-size: 18px;
        margin: 0 20px;
    }
    .buttons-container {
        flex-direction: column;
        align-items: center;
    }
    .btn1, .btn2 {
        padding: 10px 25px;
        margin: 10px 0;
    }
    .p2 {
        font-size: 16px;
        margin: 30px 20px;
    }
}