body {
    background-color: #ddd;
    margin: 24px;
    background-image: url('https://static01.nyt.com/images/2020/11/02/arts/30mandlorian-recap/30mandlorian-recap-superJumbo.jpg');
    background-repeat: no-repeat;
    background-attachment: fixed;
    background-size: cover;
    
}
.timer {
    font-family: 'Roboto', sans-serif;
    display: inline-block;
    padding: 24px 32px; 
    border-radius: 30px; 
    background-color: #fff;
}

.timer__part {
    font-size: 36px;
    font-weight: bolder;
}

.timer__btn {
    width: 50px;
    height: 50px;
    margin-left: 16px; 
    border-radius: 50%;
    border: none;
    color: white;
    background-color: rgb(111, 36, 231);
    cursor: pointer;
}

.timer__btn--start {
    background-color: rgb(34, 173, 16);
}

.timer__btn--stop {
    background-color: rgb(152, 15, 15);
}