index.css

footer {
    position: absolute;
    bottom: 0;
}

footer > a {
    color: orange;
}

span {
    display: flex;
    align-items: center;
    padding: 0 0 0 10;
}

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

.suffix {
    font-size: 1.5rem;
    background-color: #444444;
    border-left: 0;
    padding-right: 1rem;
    white-space: nowrap; /* to prevent wrapping when zooming in */
    color: #aaaaaa;
    border-radius: 0 0.2em 0.2em 0;
}

body {
    color: lightgray;
    background-color: black;
    display: flex;
    justify-content: space-around;
    align-items: center;
}

#contForTxtInputs {
    display: flex;
    justify-content: center;
    gap: 5rem;
}

.contForEachSport {
    display: flex;
    flex-direction: column;
    gap: 1.1rem;
}

.incorrectInput { 
    /* Important is needed so that it overrides the border 0 in .paceInputs */
    border-left: 0.5em red solid !important;
}

.paceInputs {
    border: 0;
    font-size: 1.5em;
    color: white;
    border-radius: 0.2em 0 0 0.2em;
    text-align: right;
    border-right: 0;
    background-color: #444444;
}

.paceInputs:focus {
    outline: 0;
}

@media screen and (orientation:portrait) {    
    #contForTxtInputs {
        height: 100%;
        flex-direction: column;
    }

    #theSlider
    {
        -webkit-appearance: slider-vertical; /* Chromium needs just this to show input range vertically. Firefox sadly doesn't accept this.*/
        height: 95vh;
        width: 40vw; /* need this because owise firefox throw it too much to right*/
    }
 
    .paceInputs {
        width: 70%;
    }

    footer {
        font-size: 0.7rem;
        z-index: 0;
        left: 10;
    }
}

@media screen and (orientation:landscape) {
    #theSlider{
        width: 95vw;
        padding: 2rem 0 2rem 0;
    }

    body {
        height: 80%;
        flex-direction: column;
    }
}