#body {
    margin: 0;
    height: 100vh;
    font-family: sans-serif;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    background-image: url(images/light-mode-bg.jpg);
    background-size: cover;
    background-position: bottom;
    overflow: hidden;
}

h1 {
    text-transform: uppercase;
    letter-spacing: 4px;
    font-size: 30px;
    text-align: center;
    color: wheat;
}

.clock {
    display: flex;
}

.clock div {
    margin: 5px;
    position: relative;
}

.clock span {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 100px;
    height: 80px;
    font-size: 50px;
    background-color:darksalmon;
    opacity: .8;
    color: white;
    text-shadow: 2px 2px 4px rgba(0,0,0,.3);
}

.clock .text {
    height: 30px;
    font-size: 15px;
    text-transform: uppercase;
    letter-spacing: 2px;
    background-color:indianred;
    opacity: .8;
}

.clock #ampm {
    bottom: 0;
    position: absolute;
    width: 60px;
    height: 30px;
    font-size: 25px;
    background-color: green;
}

#btn {
    border-width: 0;
    font-size: 15px;
    color: crimson;
    background-color: beige;
    cursor: pointer;
}