::selection{
    background-color: transparent;
}

*{
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body{
    font-family: 'Lucida Sans', 'Lucida Sans Regular', 'Lucida Grande', 'Lucida Sans Unicode', Geneva, Verdana, sans-serif;
    background-color: black;
    color: white;
    margin: 1rem;
}

h1{
    text-align: center;
    margin-top: 2rem;

    /* ANIMATION */
    opacity: 0;
    transform: translateY(-100%);
    transition: 1s ease;
}

h1.show {
    opacity: 1;
    transform: translateY(0);
}

.card-container{
    max-width: 400px;
    height: 500px;
    background-color: rgba(0, 217, 255, 0.767);
    margin-inline: auto;
    margin-top: 5rem;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: space-evenly;
    flex-direction: column;
    padding: 10px;

    /* ANIMATION */
    opacity: 0;
    translate: -50%;
    transition: 1s ease;
}

.card-container.show {
    opacity: 1;
    translate: 0;
}


.show-output{
    width: 100%;
    text-align: center;
    font-size: 3rem;
}

.incr-decr{
    width: 100%;
    display: flex;
    justify-content: center;
    gap: 2rem;
}

.increment, .decrement{
    background-color: blue;
    padding: 10px 20px;
    border-radius: 10px;
    font-size: 1.5rem;
}

.increment-by{
    display: flex;
    align-items: center;
    gap: 1rem;
}

.increment-by input{
    width: 100px;
    height: 40px;
    border: none;
    border-radius: 5px;
    font-size: 1.5rem;
    outline: none;
}

.reset-btn{
    padding: 10px 20px;
    font-size: 1.3rem;
    border: none;
    border-radius: 5px;
    background-color: thistle;
}