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

}

html{
    font-size: 62.5%;
}
body{
    background-image: url('https://media1.tenor.com/m/x9O4ak2OpJwAAAAd/cat-weird.gif');
    background-size: cover;
    font-size: 1rem;
    display: flex;
    gap: 2rem;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    flex-wrap: wrap;
    font-family: sans-serif;
    padding:0;
    margin:0;
}

.card{
    width: 40rem;
    height: 40rem;
    background: white;
    border-radius: 5rem;
    box-shadow: 0 1rem 2rem 0 black;
    flex-shrink: 0;
}

.card--buy{
    display: flex;
    align-items: center;
    flex-direction: column;
    padding: 2rem;
    gap: 2rem;
}

.card--buy img{
    height: 70%;
    width: 100%;
}

.card--buy p{
    height: 20%;
    font-size: 75%;
}

.card--slider{
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 4rem;
    padding: 4rem;
    
}

.card--slider > h2{
    font-size: 400%; 
} 

.card--slider > input{
    -webkit-appearance: none;
    width: 100%;
    height: 1.8rem;
    border-radius: 5rem;
    background: #283048;  /* fallback for old browsers */
    background: -webkit-linear-gradient(to right, #859398, #283048);  /* Chrome 10-25, Safari 5.1-6 */
    background: linear-gradient(to right, #859398, #283048); /* W3C, IE 10+/ Edge, Firefox 16+, Chrome 26+, Opera 12+, Safari 7+ */

}

.card--slider > input::-webkit-slider-thumb { 
    -webkit-appearance: none;
    appearance: none;
    width: 3rem;
    height: 3rem;
    border-radius: 50%;
    background: #283048;  /* fallback for old browsers */
    background: -webkit-linear-gradient(to right, #859398, #283048);  /* Chrome 10-25, Safari 5.1-6 */
    background: linear-gradient(to right, #859398, #283048); /* W3C, IE 10+/ Edge, Firefox 16+, Chrome 26+, Opera 12+, Safari 7+ */
    border: none;
    cursor: pointer; 
}

.card--slider > input::-moz-range-thumb {
    width: 3rem;
    height: 3rem;
    border-radius: 50%;
    background: #283048;  /* fallback for old browsers */
    background: -webkit-linear-gradient(to right, #859398, #283048);  /* Chrome 10-25, Safari 5.1-6 */
    background: linear-gradient(to right, #859398, #283048); /* W3C, IE 10+/ Edge, Firefox 16+, Chrome 26+, Opera 12+, Safari 7+ */
    border: none;
    cursor: pointer;
}

.card--stopwatch{
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
    gap: 4rem;
}

.timerText{
    font-size: 200%;
}

.button{
    padding: 1rem 2rem;
    font-size: 2rem;
    border-radius: 0.5rem;
    color: white;
}

.button--start{
    background: green;
}

.button--stop{
    background: red;
}

.button--reset{
    background: blueviolet;
}