main.css

/* general */
html, body {
    font-family: 'Press Start 2P', cursive;
    height: 100%;
    background-color: black;
    user-select: none;
}

body {
    margin: 6vh 12vw;
}

body,
a {
    color: white;
}

/* div we write into */
#output {
    padding: 0;
    margin: 0 0 10rem 0;
    display: flex;
    align-items: center;
    flex-direction: column;
    word-spacing: .2rem;
    line-height: 3rem;
}

/* container for the slide */
.slide {
    padding: 2rem 1rem;
    margin-bottom: 1rem;
    width: 100%;
    font-size: large;
}

/* intro scene */
.intro {
    font-size: xx-large;
    background-color: red;
    text-align: center;
    vertical-align: middle;
    height: 15rem;
    line-height: 15rem;
}

.slide-0 .option {
    text-align: center;
    animation: blinker 2s linear infinite;
}

.slide-0 .option:hover,
.slide-0 .option:active {
    font-weight: bolder;
    animation: none;
}

/* slide containers by type */
.match {
    background-color: blue;
}

.scene {
    background-color: white;
    color: black;
}

.decision {
    background-color: #673ab7;
}

.win {
    background-color: green;
}

.loss {
    background-color: darkorchid;
}

/* option blocks */
.option {
    color: #00BCD4;
    border: 2px solid #000;
    outline: .2rem dashed #fff;
    outline-offset: 10px;
    margin: 1rem 1rem 2rem;
    width: 100%;
    cursor: pointer;
    letter-spacing: .2rem;
}

.option:focus, 
.option:hover {
    font-weight: bolder;
    color:yellow;
}

footer {
    text-align: center;
    line-height: 2rem;
}

/* responsive */
@media only screen and (max-width: 900px) {
    .slide,
    .option {
        font-size: small;
        line-height: 2rem;
    }
}

/* animation */
@keyframes blinker {
    50% {
      opacity: 0;
    }
}