#billboard::before {
    content: ' ';
    display: block;
    background: linear-gradient( rgba(0, 0, 0, 0.5), rgba(0, 0, 0, 0.5) ), url('images/worship01.jpg');
    background-position: center;
    background-size: cover;
    background-repeat: no-repeat;
    height: 100%;
    width: 100%;
    top: 0;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: -10;  /* This is pretty important. */
} 

#billboard {
    height: 100vh;
    width: 100%;
}

#billboard h1 {
    position: absolute;
    text-align: center;
    top: 50%;
    transform: translateY(-50%);
    width: 80%;
    margin: auto 10%;
    z-index: 19;
}

.spacer {
    width: 60%;
    font-size: 2vw;
    text-align: center;
    padding: 10vh 20%;
}

.spacer p {
    font-size: 1.5vw;
}

.calendarTable {
    text-align: center;
    margin-left: auto;
    margin-right: auto;
    padding-bottom: 2vw;
    border-collapse: collapse;
}

.calendarTable th {
    color: var(--prussianBlue);
    background-color: var(--jonquil);
    padding: 1vw;
    border-bottom: 1px solid var(--prussianBlue)
}

.calendarTable td {
    border: 1px solid var(--jonquil);
    padding: 1vw;
}

#page {
    margin-bottom: 2vw;
}

@media screen and (max-width: 768px) {
    .spacer {
        font-size: 3vw;
    }
}