style.css

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

.container{
    width: 40%;
    min-width: 500px;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%,-50%);
    background: grey;
    padding-bottom: 60px;
    border-radius: 10px;
    box-shadow: rgb(0, 0, 0,0.4) 0px 2px 4px,
                    rgb(0,0,0,0.3)0px 7px 13px -3px,
                    rgb(0,0,0,0.2) 0px -3px 0px inset;
}

.timer-display{
    width: 100%;
    background: whitesmoke;
    padding: 40px 0;
    font-family: 'Roboto', sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 4rem;
    border-radius: 10px 10px 0px 0px ; 
}

.laps{
    text-align: center;
    color: white;
    margin-top: 10px;
    text-decoration: none;
}

.action{
    width: 85%;
    margin: 60px auto 0 auto;
    display: grid;
    grid-template-columns: repeat(3,1fr);
    grid-gap: 30px;
}

.action button{
    padding: 10px 20px;
    background-color: white;
    color: #141313;
    border: none;
    font-family: 'Roboto', sans-serif;
    font-weight: bolder;
    border-radius: 5px;
    font-size: 18px;
    cursor: pointer;
    box-shadow: rgb(0, 0, 0,0.4) 0px 2px 4px,
    rgb(0,0,0,0.3)0px 7px 13px -3px,
    rgb(0,0,0,0.2) 0px -3px 0px inset;
}

button:hover{
    background-color: black;
    color: white;
    border: 3px solid gold;
    padding: 7px 17px;
}