style.css

* {
    box-sizing: border-box;
}
body {
    margin: 0;
    display: flex;
    flex-direction: column;
    justify-content: space-around;
    align-items: center;
    background-color: black;
    color: white;
    text-align: center;
    font-family: Verdana, Geneva, Tahoma, sans-serif;
    min-height: 100vh;
    border: 10px solid darkgray;
}
.win {
    border: 10px solid rgb(0, 255, 42);
}
.loss {
    border: 10px solid red;
}
.choices {
    width: 80%;
    display: flex;
    flex-direction: row;
    justify-content:center;
    align-items: center;
    gap: 30px;
}
.choices > button {
    padding: 30px;
    background-color:rgb(175, 175, 175);
    transition: all .17s ease;
    border-radius: 5px;
    border: 0;
    font-weight: bold;
}
.choices > button:hover {
    background-color:rgb(0, 255, 42);
    transform:scale(1.3);
}
.choices > button:disabled {
    background-color:gray;
}
.result {
    width: 80%;
    margin: 0 auto;
}
.reset {
    padding: 30px;
}
button {
    cursor:pointer;
}
.conclusion {
    font-size: 1.5rem;
}