index.css

body {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    margin: 0;
    padding: 0;
    background-color: rgb(31, 28, 28);
    font-family: Verdana, Geneva, Tahoma, sans-serif;
    overflow-x: hidden;
}

body h1 {
    text-align: center;
    color: aqua;
    font-size: 70px;
    font-weight: bold;
}

body p,
span {
    font-weight: bold;
    color: white;
}

.hb-inputName {
    padding: 15px;
    font-size: 30px;
    font-weight: bold;
    margin-bottom: 70px;
    border: 4px solid rgb(248, 0, 0);
    border-radius: 15px;
    box-shadow: 0px 0px 45px rgb(255, 255, 255);
    width: 80vw;
}

.hb-button {
    border: 4px solid red;
    background-color: red;
    color: white;
    padding: 20px;
    font-size: 30px;
    margin-bottom: 40px;
    transition: all 0.8s ease;
}

.hb-button:hover {
    border-radius: 100px;
    background-color: white;
    color: red;
}

.hb-story {
    font-size: 25px;
    font-weight: bold;
    text-align: center;
}

.hb-card {
    display: none;
    margin-top: 50px;
    margin-bottom: 100px;
    width: 70vw;
    border: 3px solid white;
    padding: 40px;
    border-radius: 20px;
    box-shadow: 0px 0px 200px yellow;
}

.hb-open {
    margin-top: 50px;
    margin-bottom: 100px;
    width: 70vw;
    border: 3px solid white;
    padding: 40px;
    border-radius: 20px;
    box-shadow: 0px 0px 200px yellow;
}

.hb-name {
    text-transform: capitalize;
}

.hb-wrongTime {
    display: none;
    margin-top: 40px;
    font-size: 30px;
    text-align: center;
}