site/_src/_assets/styles/bigchain/_hero.scss

//
// Hero
// ---
// bigchain.io
//

$menu-height-md: 73px;

.hero {
    text-align: center;
    overflow: hidden;
    position: relative;
    text-shadow: 0 1px 0 rgba(0,0,0,.1);

    .section {
        @media ($screen-md) {
            min-height: calc(100vh - #{$menu-height-md});
        }
    }

    // background
    background: url('../img/photo1.jpg') no-repeat center bottom;
    background-size: cover;

    // color overlay
    &:before {
        content: "";
        width: 100%;
        height: 100%;
        position: absolute;
        left: 0;
        top: 0;
        bottom: 0;
        right: 0;
        background: linear-gradient(to top left, $brand-main-blue 0%, $brand-main-brown 100%);
        opacity: .7;
        z-index: 0;
    }

    .logo--full {
        fill: #fff;
        fill-opacity: .8;
        margin: auto;
        max-width: 31em;

        @media ($screen-sm) {
            margin-top: -$menu-height-md;
            margin-bottom: ($spacer * 2);
        }
    }

    .section-title {
        color: #fff;
        margin-bottom: $spacer;

        &:after { display: none }
    }

    .btn {
        color: #fff;
        margin-top: ($spacer * 4);
        opacity: .8;

        &:hover,
        &:focus { opacity: 1; }

        // the caret
        .icon {
            width: 12px;
            height: 12px;
            stroke: #fff;
            display: block;
            margin: auto;
        }
    }

    // intro animation
    .logo--full,
    .section-title,
    .btn {
        @extend .animation-slide-in-from-bottom;
        animation-duration: 1s;
        animation-fill-mode: backwards;
    }

    .logo--full {
        animation-timing-function: $timing-default;
    }

    .section-title,
    .btn {
        @extend .animation-slide-in-from-bottom;
        animation-play-state: paused;
    }

    .btn { animation-delay: .2s; }

    &.is-ready {
        .section-title,
        .btn {
            animation-play-state: running;
        }
    }
}

.hero__content {
    position: relative;
    z-index: 1;
}