memory.css

body {
    background-color: #151b29;
}
.b {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: center;
    width:400px;
    height:100%;
}
.c {
    display:flex;
    justify-content: center;
}
h1 {
    text-align: center;
    text-decoration: underline;
    color: red;
}
h2 {
    text-align: center;
    color: red;
}

h3 {
    text-align: center;
    color: red;
}
h4 {
    text-align: center;
    color: red;
}
h5 {
    text-align: center;
    color: red;
}
button {
    color: #ffa260;
    border-color: yellow;
    border: 2px;
    border-style: solid;
    background-color: #151b29;
    padding: 1em 2em;
    font-size: 1em;
    transition: all 0.25s;

}
button:hover {
    border-color: yellow;
    color: white;
    box-shadow: 0em 0.5em 0.5em -0.4em #f1ff5c;
    transform: translateY(-0.5em);
    transform: scale(1.1);
    cursor: pointer;
}
.d {
    display: flex;
    justify-content: center;
}
a {
    text-decoration: none;
    color:inherit;
}