* {
    margin: 0px;
    padding: 0px;
}

body {
    display: flex;
    position: absolute;
    justify-content: center;
    align-items: center;
    text-align: center;
    height: 100vh;
    width: 100vw;
    background-color: rgb(128, 205, 207);
}

.container {
    position: relative;
    background-color: whitesmoke;
    padding: 2em;
    border-radius: 0.5em;
    align-items: center;
    text-align: center;
    /* height: 50vh; */
    width: 40vw;
}

h1 {
    font-family: 'Lucida Sans', 'Lucida Sans Regular', 'Lucida Grande', 'Lucida Sans Unicode', Geneva, Verdana, sans-serif;
    font-weight: lighter;
    font-size: 2.1em;
}

#start-btn {
    background-color: rgb(120, 198, 120);
}

#stop-btn {
    display: none;
    background-color: rgb(149, 62, 62);
}