/* Mingle2 additions on top of Source's built screen.css. Loaded unbuilt, after it.
   Sizes reuse Source's scale (1.4rem small, 1.5rem body UI, 1.8rem headings); colours use Source's neutral tokens. */

:root {
    --m2-small: 1.4rem;
    --m2-ui: 1.5rem;
    --m2-heading: 1.8rem;
    --m2-radius: 5px;
    --m2-shadow: 0 0 0 1px rgb(0 0 0 / 0.04), 0 7px 20px -5px rgb(0 0 0 / 0.15);
}

/* Top bar: main menu and social icons */

.m2-topbar {
    position: relative;
    z-index: 100;
    font-size: var(--m2-small);
    font-weight: 550;
    background-color: var(--color-lighter-gray);
    border-bottom: 1px solid var(--color-border);
}

.m2-topbar-inner {
    display: flex;
    gap: 24px;
    align-items: center;
    justify-content: space-between;
    min-height: 44px;
}

.m2-topbar .nav {
    display: flex;
    flex-wrap: wrap;
    gap: 4px 20px;
    margin: 0;
    padding: 8px 0;
    list-style: none;
}

.m2-topbar a,
.m2-social a {
    color: var(--color-darker-gray);
}

.m2-topbar a:hover {
    opacity: 0.7;
}

/* Dropdowns: mingle2.js moves each "- " item into a .m2-submenu under the item before it */

.nav .is-subitem {
    display: none;
}

.m2-has-submenu {
    position: relative;
}

.m2-has-submenu > a::after {
    content: "";
    width: 0.4em;
    height: 0.4em;
    margin-left: 0.15em;
    border-right: 1.5px solid currentColor;
    border-bottom: 1.5px solid currentColor;
    transform: translateY(-0.15em) rotate(45deg);
}

.m2-submenu {
    position: absolute;
    top: 100%;
    left: -16px;
    z-index: 90;
    display: grid;
    grid-template-columns: 1fr 1fr;
    column-gap: 32px;
    min-width: 360px;
    margin: 0;
    padding: 16px 24px;
    list-style: none;
    visibility: hidden;
    background-color: var(--color-white);
    border-radius: var(--m2-radius);
    box-shadow: var(--m2-shadow);
    opacity: 0;
    transition: opacity 0.2s, visibility 0.2s;
}

.m2-submenu .is-subitem {
    display: block;
}

.m2-submenu a {
    display: block;
    padding: 6px 0;
    white-space: nowrap;
    color: var(--color-darker-gray) !important;
}

.m2-has-submenu:hover > .m2-submenu,
.m2-has-submenu:focus-within > .m2-submenu {
    visibility: visible;
    opacity: 1;
}

/* Social icons */

.m2-social {
    display: flex;
    flex-shrink: 0;
    gap: 14px;
    align-items: center;
}

.m2-social svg {
    display: block;
    width: 16px;
    height: 16px;
}

/* Logo row: the mobile copy of the main menu shows only inside the burger menu */

.m2-mobile-menu {
    display: none;
}

.m2-sidebar-toggle svg {
    width: 22px;
    height: 22px;
}

@media (max-width: 767px) {
    .m2-topbar {
        display: none;
    }

    .is-open#gh-navigation .gh-navigation-menu {
        flex-direction: column;
        align-items: center;
    }

    .is-open#gh-navigation .m2-mobile-menu {
        display: flex;
        flex-direction: column;
        gap: 32px;
        align-items: center;
    }

    #gh-navigation .m2-mobile-menu .is-subitem,
    #gh-navigation .m2-submenu .is-subitem {
        display: block;
    }

    #gh-navigation .m2-submenu {
        position: static;
        display: flex;
        flex-direction: column;
        gap: 12px;
        min-width: 0;
        padding: 12px 0 0;
        visibility: visible;
        background: none;
        box-shadow: none;
        opacity: 1;
    }

    #gh-navigation .m2-submenu a {
        font-size: var(--m2-ui);
        font-weight: 400;
        text-align: center;
    }

    #gh-navigation .m2-has-submenu > a::after {
        display: none;
    }

    .m2-sidebar-toggle {
        display: none;
    }
}

/* Slide-out categories sidebar */

.m2-sidebar {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    z-index: 4000000;
    width: min(340px, 100%);
    padding: 64px 32px 32px;
    overflow-y: auto;
    font-size: var(--m2-ui);
    background-color: var(--background-color, var(--color-white));
    box-shadow: var(--m2-shadow);
}

.m2-sidebar[hidden] {
    display: none;
}

.m2-sidebar-close {
    position: absolute;
    top: 16px;
    right: 16px;
}

.m2-sidebar a {
    color: var(--color-darker-gray);
}

/* Widgets: footer columns and sidebar */

.m2-widget-title {
    margin: 0 0 16px;
    font-size: var(--m2-heading);
    font-weight: 700;
}

.m2-widget-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin: 0;
    padding: 0;
    list-style: none;
}

.m2-widget-list .m2-count {
    display: none;
    color: var(--color-secondary-text);
}

.m2-widget-list.has-count .m2-count {
    display: inline;
}

.m2-footer-widgets {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--grid-gap);
    padding-block: 48px;
    border-top: 1px solid var(--color-border);
}

.m2-footer-widgets p {
    margin: 0;
    line-height: 1.6;
    color: var(--color-secondary-text);
}

.m2-about-image {
    display: block;
    max-width: 120px;
    margin-bottom: 16px;
    border-radius: var(--m2-radius);
}

.gh-footer-bar {
    display: block;
    margin-bottom: 48px;
    text-align: center;
}

.gh-footer-copyright {
    text-align: center;
    white-space: normal;
    color: var(--color-secondary-text);
}

@media (max-width: 767px) {
    .m2-footer-widgets {
        grid-template-columns: 1fr;
    }
}

/* Post page */

.m2-article-categories {
    display: flex;
    flex-wrap: wrap;
    gap: 4px 16px;
}

.m2-toc {
    margin: 0 0 32px;
    padding: 16px 24px;
    font-size: var(--m2-ui);
    border: 1px solid var(--color-border);
    border-radius: var(--m2-radius);
}

.m2-toc summary {
    font-weight: 700;
    cursor: pointer;
}

.m2-toc ol {
    margin: 12px 0 0;
    padding-left: 20px;
}

.m2-toc li {
    margin: 6px 0;
}

.m2-toc .is-sub {
    margin-left: 16px;
}

.m2-toc a {
    color: inherit;
    text-decoration: none;
}

.m2-article-footer {
    display: flex;
    flex-direction: column;
    gap: 24px;
    margin-top: 48px;
}

.m2-article-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    font-size: var(--m2-small);
}

.m2-article-tags a {
    padding: 4px 12px;
    color: var(--color-darker-gray);
    background-color: var(--color-lighter-gray);
    border-radius: 999px;
}

.m2-article-tags:empty {
    display: none;
}

.m2-share {
    display: flex;
    gap: 16px;
    align-items: center;
    padding-block: 16px;
    border-block: 1px solid var(--color-border);
}

.m2-share-label {
    font-size: var(--m2-small);
    font-weight: 700;
}

.m2-share a {
    color: var(--color-darker-gray);
}

.m2-share svg {
    display: block;
    width: 20px;
    height: 20px;
}

.m2-author-box {
    display: grid;
    grid-template-columns: 72px 1fr;
    gap: 20px;
    align-items: start;
    margin-top: 48px;
}

.m2-author-image img,
.m2-author-image svg {
    display: block;
    width: 72px;
    height: 72px;
    object-fit: cover;
    border-radius: 50%;
}

.m2-author-name {
    margin: 0 0 8px;
    font-size: var(--m2-heading);
}

.m2-author-name a {
    color: inherit;
}

.m2-author-bio {
    margin: 0;
    white-space: pre-line;
    font-size: var(--m2-ui);
    line-height: 1.6;
    color: var(--color-secondary-text);
}

.m2-post-nav {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
    margin-top: 48px;
}

.m2-post-nav:empty {
    display: none;
}

.m2-post-nav-item {
    display: flex;
    flex-direction: column;
    gap: 6px;
    padding: 20px;
    color: var(--color-darker-gray);
    border: 1px solid var(--color-border);
    border-radius: var(--m2-radius);
}

.m2-post-nav-item.is-next {
    grid-column: 2;
    text-align: right;
}

.m2-post-nav-label {
    font-size: var(--m2-small);
    color: var(--color-secondary-text);
}

.m2-post-nav-title {
    font-size: var(--m2-ui);
    font-weight: 700;
    line-height: 1.4;
}

.m2-comments {
    margin-block: 64px;
}

@media (max-width: 767px) {
    .m2-post-nav {
        grid-template-columns: 1fr;
    }

    .m2-post-nav-item.is-next {
        grid-column: 1;
    }
}

/* 404 page */

.m2-error {
    padding-block: 64px 32px;
}

.m2-error-message {
    max-width: 640px;
    margin: 0 auto;
    text-align: center;
}

.m2-error-code {
    margin: 0 0 12px;
    font-size: var(--m2-small);
    font-weight: 700;
    letter-spacing: 0.1em;
    color: var(--color-secondary-text);
}

.m2-error-title {
    margin: 0;
    font-size: calc(clamp(3.4rem, 1.36vw + 2.85rem, 4.6rem) * var(--factor, 1));
    line-height: 1.1;
    letter-spacing: -0.022em;
}

.m2-error-text {
    margin: 16px 0 32px;
    font-size: var(--m2-heading);
    line-height: 1.5;
    color: var(--color-secondary-text);
}

.m2-error-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    justify-content: center;
}

.m2-error-search {
    display: inline-flex;
    gap: 0.4em;
    align-items: center;
    padding: 0.8em 1.4em;
    font-size: var(--m2-ui);
    font-weight: 600;
    line-height: 1;
    color: var(--color-darker-gray);
    cursor: pointer;
    background: none;
    border: 1px solid var(--color-border);
    border-radius: 100px;
}

.m2-error-search svg {
    width: 1em;
    height: 1em;
}

.m2-error-categories {
    max-width: 880px;
    margin: 64px auto 0;
    padding-top: 32px;
    text-align: center;
    border-top: 1px solid var(--color-border);
}

.m2-error-categories .m2-widget-list {
    flex-direction: row;
    flex-wrap: wrap;
    gap: 8px;
    justify-content: center;
}

.m2-error-categories .m2-widget-list a {
    display: inline-block;
    padding: 6px 14px;
    font-size: var(--m2-small);
    color: var(--color-darker-gray);
    background-color: var(--color-lighter-gray);
    border-radius: 100px;
}

/* Source lays .gh-container-inner out as a 16-column grid except on post pages; match the post-page layout here. */
.m2-error-latest .gh-container-inner {
    display: block;
}

.m2-error-latest .gh-container-title {
    display: block;
}

@media (min-width: 768px) {
    .m2-error-latest.is-grid .gh-feed {
        grid-template-columns: repeat(3, 1fr);
    }
}