pro-docs/libs/npm/docsify-themeable@0/src/scss/app/_cover.scss

// Cover
// =============================================================================
.cover {
    display: none;
    position: relative;
    z-index: map-get($z-index, coverpage);
    min-height: 100vh;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: calc(var(--cover-border-inset, 0px) + var(--cover-border-width, 0px));
    color: var(--cover-color);
    text-align: var(--cover-text-align);

    // Bug (IE 10/11): column & min-height
    @media screen and (-ms-high-contrast: active), screen and (-ms-high-contrast: none) {
        height: 100vh;
    }

    &:before,
    &:after {
        content: '';
        position: absolute;
    }

    &:before {
        top: 0;
        bottom: 0;
        left: 0;
        right: 0;
        background-blend-mode: var(--cover-background-blend-mode);
        background-color: var(--cover-background-color);
        background-image: var(--cover-background-image);
        background-position: var(--cover-background-position);
        background-repeat: var(--cover-background-repeat);
        background-size: var(--cover-background-size);
    }

    &:after {
        top: var(--cover-border-inset, 0);
        bottom: var(--cover-border-inset, 0);
        left: var(--cover-border-inset, 0);
        right: var(--cover-border-inset, 0);
        border-width: var(--cover-border-width, 0);
        border-style: solid;
        border-color: var(--cover-border-color);
    }

    a {
        border-bottom: var(--cover-link-border-bottom);
        color: var(--cover-link-color);
        text-decoration: var(--cover-link-text-decoration);
        text-decoration-color: var(--cover-link-text-decoration-color);

        &:hover {
            border-bottom: var(--cover-link-border-bottom--hover, var(--cover-link-border-bottom));
            color: var(--cover-link-color--hover, var(--cover-link-color));
            text-decoration: var(--cover-link-text-decoration--hover, var(--cover-link-text-decoration));
            text-decoration-color: var(--cover-link-text-decoration-color--hover, var(--cover-link-text-decoration-color));
        }
    }

    h1 {
        color: var(--cover-heading-color);
        position: relative;
        margin: 0;
        font-size: var(--cover-heading-font-size);
        font-weight: var(--cover-heading-font-weight);
        line-height: 1.2;

        a,
        a:hover {
            display: block;
            border-bottom: none;
            color: inherit;
            text-decoration: none;
        }

        small {
            position: absolute;
            bottom: 0;
            margin-left: 0.5em;
        }

        // Fluid
        span {
            font-size: calc(var(--cover-heading-font-size-min) * 1px);

            @include media(">=xsmall") {
                font-size: calc((var(--cover-heading-font-size-min) * 1px) + (var(--cover-heading-font-size-max) - var(--cover-heading-font-size-min)) * ((100vw - 420px) / (1024 - 420)));
            }

            @include media(">=large") {
                font-size: calc(var(--cover-heading-font-size-max) * 1px);
            }
        }
    }

    blockquote {
        margin: 0;
        color: var(--cover-blockquote-color);
        font-size: var(--cover-blockquote-font-size);

        a {
            color: inherit;
        }
    }

    ul {
        padding: 0;
        list-style-type: none;
    }

    .cover-main {
        position: relative;
        z-index: 1;
        max-width: var(--cover-max-width);
        margin: var(--cover-margin);
        padding: 0 45px;

        // Buttons
        > p:last-child {
            $button-margin: 0.25em;

            margin: 1.5em -$button-margin 0 -$button-margin;

            a {
                display: block;
                margin: ($button-margin * 1.5) $button-margin;
                padding: var(--cover-button-padding);
                border: var(--cover-button-border);
                border-radius: var(--cover-button-border-radius);
                box-shadow: var(--cover-button-box-shadow);
                background: var(--cover-button-background);
                text-align: center;
                text-decoration: var(--cover-button-text-decoration);
                text-decoration-color: var(--cover-button-text-decoration-color);
                color: var(--cover-button-color);
                white-space: nowrap;
                transition: var(--cover-button-transition);

                &:hover {
                    border: var(--cover-button-border--hover, var(--cover-button-border));
                    box-shadow: var(--cover-button-box-shadow--hover, var(--cover-button-box-shadow));
                    background: var(--cover-button-background--hover, var(--cover-button-background));
                    text-decoration: var(--cover-button-text-decoration--hover, var(--cover-button-text-decoration));
                    text-decoration-color: var(--cover-button-text-decoration-color--hover, var(--cover-button-text-decoration-color));
                    color: var(--cover-button-color--hover, var(--cover-button-color));
                }

                // Primary
                &:first-child {
                    border: var(--cover-button-primary-border, var(--cover-button-border));
                    box-shadow: var(--cover-button-primary-box-shadow, var(--cover-button-box-shadow));
                    background: var(--cover-button-primary-background, var(--cover-button-background));
                    text-decoration: var(--cover-button-primary-text-decoration, var(--cover-button-text-decoration));
                    text-decoration-color: var(--cover-button-primary-text-decoration-color, var(--cover-button-text-decoration-color));
                    color: var(--cover-button-primary-color, var(--cover-button-color));

                    &:hover {
                        border: var(--cover-button-primary-border--hover, var(--cover-button-border--hover, var(--cover-button-primary-border, var(--cover-button-border))));
                        box-shadow: var(--cover-button-primary-box-shadow--hover, var(--cover-button-box-shadow--hover, var(--cover-button-primary-box-shadow, var(--cover-button-box-shadow))));
                        background: var(--cover-button-primary-background--hover, var(--cover-button-background--hover, var(--cover-button-primary-background, var(--cover-button-background))));
                        text-decoration: var(--cover-button-primary-text-decoration--hover, var(--cover-button-text-decoration--hover, var(--cover-button-primary-text-decoration, var(--cover-button-text-decoration))));
                        text-decoration-color: var(--cover-button-primary-text-decoration-color--hover, var(--cover-button-text-decoration-color--hover, var(--cover-button-primary-text-decoration-color, var(--cover-button-text-decoration-color))));
                        color: var(--cover-button-primary-color--hover, var(--cover-button-color--hover, var(--cover-button-primary-color, var(--cover-button-color))));
                    }
                }

                @include media(">small") {
                    display: inline-block;
                }
            }
        }
    }

    .mask {
        visibility: var(--cover-background-mask-visibility, hidden);
        position: absolute;
        top: 0;
        bottom: 0;
        left: 0;
        right: 0;
        background-color: var(--cover-background-mask-color);
        opacity: var(--cover-background-mask-opacity);
    }


    // State
    // =========================================================================
    // Display mask with markdown background image
    &.has-mask {
        .mask {
            visibility: visible;
        }
    }

    &.show {
        display: flex;
    }
}