:root {
    --banner-bg-top: light-dark(#444, #444);
    --banner-bg-center: light-dark(#0f0, #0f0);
    --banner-bg-bottom: light-dark(#222, #222);
    --banner-color: light-dark(#0f0, #0f0);
}

.banner {
    height: 400px;
    position: relative;
    background-image: -webkit-gradient(linear, left top, left bottom, from(var(--banner-bg-bottom)), color-stop(var(--banner-bg-center)), color-stop(90%, var(--banner-bg-bottom)));
    background-image: -o-linear-gradient(top, var(--banner-bg-bottom), var(--banner-bg-center), var(--banner-bg-bottom) 90%);
    background-image: linear-gradient(to bottom, var(--banner-bg-bottom), var(--banner-bg-center), var(--banner-bg-bottom) 90%);
    -webkit-clip-path: polygon(0% 0%,
            0% calc(100% - 30px),
            calc(50% - 75px) calc(100% - 30px),
            calc(50% - 50px) 100%,
            calc(50% + 50px) 100%,
            calc(50% + 75px) calc(100% - 30px),
            100% calc(100% - 30px),
            100% 0%);
    clip-path: polygon(0% 0%,
            0% calc(100% - 30px),
            calc(50% - 75px) calc(100% - 30px),
            calc(50% - 50px) 100%,
            calc(50% + 50px) 100%,
            calc(50% + 75px) calc(100% - 30px),
            100% calc(100% - 30px),
            100% 0%);
    z-index: 8;
    margin-bottom: -30px;
}

.banner::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-image: -webkit-gradient(linear, left top, right top, from(rgba(0, 0, 0, 0)), color-stop(rgba(0, 0, 0, .6)), to(rgba(0, 0, 0, 0)));
    background-image: -o-linear-gradient(left, rgba(0, 0, 0, 0), rgba(0, 0, 0, .6), rgba(0, 0, 0, 0));
    background-image: linear-gradient(to right, rgba(0, 0, 0, 0), rgba(0, 0, 0, .6), rgba(0, 0, 0, 0));
    z-index: -1
}

.banner .caption {
    position: absolute;
    left: 50%;
    top: 50%;
    -webkit-transform: translate(-50%, -50%);
    -ms-transform: translate(-50%, -50%);
    transform: translate(-50%, -50%);
    text-align: center;
    padding: 10px;
}

.banner .caption span {
    display: block;
    color: var(--banner-color);
}

.banner .caption span:first-of-type {
    font-size: 3rem;
    font-weight: bold;
}

.banner .caption span:last-of-type {
    font-style: italic;
}