styles.css

body {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
    background-color: #F5FDC6;
}

.container {
    background: #D0B17A;
    width: 450px;
    height: 450px;
    border-radius: 50%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    box-sizing: border-box;
    padding: 20px;
    position: relative;
}

#time {
    width: 255px;
    height: 80px;
    background: #F5FDC6;
    font-size: 72px;
    color: #0E131F;
    margin: 20px;
    letter-spacing: 11px;
    text-align: center;
    border-radius: 7px;
    cursor: pointer;
}

.buttons {
    width: 255px;
    display: flex;
    justify-content: space-between;
}

#pause,
#play {
    font-size: 20px;
    padding: 10px 20px;
    cursor: pointer;
}

button {
    background-color: white;
    border-radius: 5px;
    width: 110px;
}

#pause {
    border: 2px solid #FF1654;
    color: #FF1654;
}

#play {
    border: 2px solid #41521F;
    color: #41521F;
}

#pause:hover {
    background-color: #FF1654;
    color: white;
}

#play:hover {
    background-color: #41521F;
    color: white;
}

@media screen and (max-width: 450px) {
    .container {
        width: 320px;
        height: 320px;
    }

    #time {
        width: 230px;
        height: 55px;
        letter-spacing: 9px;
        border-radius: 7px;
        font-size: 48px;
    }

    .buttons {
        width: 230px;
    }

    button {
        width: 100px;
    }
}