main.css

* {
    padding: 0;
    margin: 0;
    box-sizing: border-box;
    font-size: 30px;
}

.keyboard {
    display: flex;
    flex-direction: column;
    margin: 5rem auto 1rem;
    width: 80%;
}

.line {
    display: flex;
    justify-content: center;
}

.key {
    line-height: 2rem;
    border: 1px black solid;
    border-right: 2px black solid;
    border-bottom: 2px black solid;
    width: 2rem;
    text-align: center;
    margin: .2rem;
}

.spacebar {
    width: 10rem;
    height: 2rem;
}

.blank {
    border: none;
}

.textBoxContainer {
    width: 100%;
    margin: 1rem auto 1rem;
    text-align: center;
}

.textBox {
    border: 1px black solid;
    width: 25rem;
    resize: none;
    scrollbar-color: black;
    padding: 0.5rem;
    height: 2.4rem;
    text-transform: uppercase;
}

.crypTitle {
    margin: 0 auto 0.75rem;
    width: 100%;
}

.cryptic {
    cursor: default;
}

.cryptic:focus {
    outline: none;
}

.pressed {
    background-color: yellow;
}

@keyframes flash {
    0% {}
    50% {background: yellow;}
    100% {}
}

@media screen and (max-width: 750px) {
    *  {
        font-size: 15px;
    }
}