style.css

/* General Styles */
*{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Lato', sans-serif;
}

body{
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    text-align: center;
}
#halo {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 100%;
    height: 100vh;
}
#container {
    width: 550px;
    height: 450px;
}
.header {
    display: flex;
    font-size: 1.2rem;
    border: solid 2px white;
    color: white;
    background-color: black;
    padding: 10px;
    width: 80%;
    margin: 20px auto;
    border-radius: 4px;
    text-align: center;
    align-items: center;
    justify-content: center;
    height: 40px;
    transition: height 1s;
}
.header:hover {
    height: 100px;
}
.main-content {
    width: 100%;
    height: 300px;
    border-radius: 15px;
    padding: 50px 40px;
    box-shadow: 0 0 10px;
    background-color: white;
    transform-style: preserve-3d;
    transition: all 1s ;
}
.main-content:hover{
    opacity: .8;
}
.main-content .text-area {
    transform: translateZ(20px);
    color: black;
    text-shadow: 0 5px 5px rgba(0, 0, 0, 0.262);
    font-size: 1.5rem;
    line-height: 1.5;
}
.main-content .person {
    transform: translateZ(20px);
    font-size: 1.6rem;
    color: rgb(51, 0, 179);
    text-shadow: 0 5px 5px rgba(0, 0, 0, 0.262);
    font-weight: bold;
    text-transform: uppercase;
    margin-top: 20px;
}
.button-area button {

    background-color: rgb(72, 72, 72);
    color: white;
    font-size: 1.3rem;
    padding: 10px 15px;
    margin-top: 20px;
    border-radius: 5px;
    cursor: pointer;
}
.button-area button:active {
    background-color: rgb(200, 200, 200);
}
@media screen and (max-width: 550px) {
    .main-content, .header{
      font-size: 1rem;
      display: flex;
      flex-direction: column;
      height: auto;
      transition: all 1s;
    }
    .header{
        height: 40px;
    }
}