html,
body{
    height: 100%;
}
.container-fluid {
    padding-top: 5px;
}
.bg-warning {
    background-color: #e0a800 !important;
}

.masthead {
    position: relative;
    background: url(../img/bg-masthead.jpg) center center no-repeat;
    background-size: cover;
}

.masthead .overlay {
    position: absolute;
    background-color: #212529;
    height: 100%;
    width: 100%;
    top: 0;
    left: 0;
    opacity: .8
}
.btn-lg {
    font-size: 1.5rem;
    line-height: 1.5;
    border-radius: .3rem;
    padding: 30px;
}
#clock, #date-block {
    display: none;
}