:root {
    --font-family: "Ubuntu",sans-serif;
    --color-background: #000611;
    --color-text-darker: #9BA6BC;
    --color-text-lighter: #E9EFFC;
    --color-text-terminal: #00339A;
    --color-terminal-background: #000;
    --color-terminal-border: #101729;
}


html,
body {
    width: 100%;
    height: 100%;
    margin: 0;
    padding: 0;
    font-family: var(--font-family);
    background-color: var(--color-background);
}

button {
    margin: 50px auto;
    display: block;
    border-radius: 10px;
    padding: 10px;
    background-color: var(--color-text-terminal);
    color: var(--color-text-lighter);
    box-shadow: none;
    border: none;
    font: "Ubuntu", sans-serif;
    font-weight: bold;
    font-size: 2rem;

}

.hidden {
    visibility: hidden;
}

#ball {
    background-color: var(--color-text-darker);
    height: 50px;
    width: 50px;
    border-radius: 50%;
    position: absolute;
}

#bg-text {
    margin: 0;
    text-align: center;
    font-size: 3.3rem;
    text-transform: uppercase;
    color: var(--color-terminal-border)
}

#field {
    position: relative;
    border: 1px solid var(--color-terminal-border);
    margin: auto;
    background-color: var(--color-terminal-background);
    background-image: -moz-element(#bg-text);
    background-repeat: repeat;
}

#racket {
    position: absolute;
    height: 5px;
    background-color: var(--color-text-darker);
}


.noselect {
    -webkit-touch-callout: none;
    /* iOS Safari */
    -webkit-user-select: none;
    /* Safari */
    -khtml-user-select: none;
    /* Konqueror HTML */
    -moz-user-select: none;
    /* Old versions of Firefox */
    -ms-user-select: none;
    /* Internet Explorer/Edge */
    user-select: none;
    /* Non-prefixed version, currently
                                  supported by Chrome, Edge, Opera and Firefox */
}