body {
    background: url(images/tree.jpg) center center fixed;
    background-size: cover;
}

.container-fluid {
    color: #fff;
}

h1 {
    font-size: 6vw;
    text-align: center;
    color: #a9a9f3;
}

#laptime {
    text-align: right;
    font-size: 2vw;
}

#time {
    text-align: center;
    font-size: 8vw;
    margin-bottom: 0px;
}

.button {
    background-color: #4a4a81;
    height: 15vw;
    width: 15vw;
    border-radius: 100%;
    text-align: center;
    padding-top: 5vw;
    font-weight: bold;
    font-size: 3vw;
    cursor: pointer;
    color: aliceblue;
}

.button:hover {
    background-color: #4a4a81;
    opacity: 0.7;
}


#stop, #reset, #resume {
    display: none;
}

#lapRecord {
    margin-top: 20px;
    height: 40vw;
    overflow-y: scroll;
    display: none;
}



@media(max-width: 600px) {
    .button {
        background-color: #4a4a81;
        height: 20vw;
        width: 20vw;
        border-radius: 100%;
        text-align: center;
        padding-top: 7vw;
        font-weight: bold;
        font-size: 4vw;
        cursor: pointer;
        color: aliceblue;
        margin-right: 10vw;
    }
}