/*
 * Styles for the modified Pure theme.
 *
 * This file used to be layered on top of Pure 0.3.0 and FontAwesome 4.1.0, both
 * loaded from cdnjs. It is now self-contained: the handful of Pure classes the
 * templates used (.pure-g-r, .pure-u, .pure-u-1) have been replaced by the layout
 * rules below, and the three social icons are inlined SVG. The site makes no
 * third-party requests from its own markup.
 *
 * .pure-img is kept because a few articles reference it in raw HTML.
 */

:root {
    color-scheme: light dark;

    --text:        light-dark(#333332, #d8d8d4);
    --text-strong: light-dark(#000000, #f4f4f2);
    --muted:       light-dark(#6f6f6d, #9a9a96);
    --bg:          light-dark(#ffffff, #16161a);
    --link:        light-dark(#5a5ab0, #a9a9e8);
    --rule:        light-dark(#f2f2f0, #303038);
    --rule-strong: light-dark(#dededc, #3c3c46);
    --on-cover:    #ffffff;

    --sidebar-width: 25%;
    --font: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto,
            "Helvetica Neue", Arial, sans-serif;
}

*, *::before, *::after {
    box-sizing: border-box;
}

html {
    -webkit-text-size-adjust: 100%;
}

body {
    margin: 0;
    font-family: var(--font);
    background: var(--bg);
    color: var(--text);
}

img, svg, iframe {
    max-width: 100%;
}

a {
    text-decoration: none;
    color: var(--link);
}
a:hover,
a:focus {
    text-decoration: underline;
}

/* Visible keyboard focus. The old theme had none. */
a:focus-visible {
    outline: 2px solid currentColor;
    outline-offset: 2px;
    border-radius: 2px;
}

pre {
    padding: 15px;
    font-size: 90%;
    overflow-x: auto;
    background: light-dark(#f7f7f5, #1e1e24);
    border: 1px solid var(--rule);
}

.highlight pre {
    font-size: 75%;
}

/* ---------------------------------------------------------------- layout */

#layout {
    padding-left: var(--sidebar-width);
    position: relative;
}

.sidebar {
    position: fixed;
    inset: 0 auto 0 0;
    width: var(--sidebar-width);
}

.content {
    padding: 2em 3em 0;
    max-width: 1000px;
    font-size: 110%;
    line-height: 1.45;
}

/* --------------------------------------------------------------- sidebar */

.cover-img {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    background-position: center;
    background-repeat: no-repeat;
    background-size: cover;
    box-shadow: inset -1px 0 0 rgb(0 0 0 / 0.3);
}

.cover-body {
    position: absolute;
    bottom: 0;
    max-width: 100%;
    padding-top: 100px;
    background-image: linear-gradient(to top,
        rgb(0 0 0 / 0.5) 0, rgb(0 0 0 / 0.3) 70%, rgb(0 0 0 / 0) 100%);
}

.header {
    text-align: left;
    width: 767px;
    max-width: 100%;
}

.brand-main {
    margin: 0;
}

.brand-main a {
    text-transform: uppercase;
    margin-left: 15px;
    font-size: 25px;
    color: var(--on-cover);
    border-bottom: 1px solid rgb(255 255 255 / 0.3);
    text-shadow: 0 1px 3px rgb(0 0 0 / 0.3);
}

.tagline {
    margin-left: 15px;
    margin-top: -15px;
    line-height: 15px;
    font-size: 80%;
    text-shadow: 0 1px 3px rgb(0 0 0 / 0.3);
    color: var(--on-cover);
}

.links a {
    font-size: 15px;
    padding-left: 15px;
    letter-spacing: 2px;
    text-shadow: 0 1px 3px rgb(0 0 0 / 0.3);
    color: var(--on-cover);
}

.social {
    display: flex;
    gap: 15px;
    margin-left: 15px;
    align-items: center;
}

.social a {
    color: var(--on-cover);
    display: inline-flex;
    filter: drop-shadow(0 1px 3px rgb(0 0 0 / 0.4));
}

.social .icon {
    width: 32px;
    height: 32px;
}

/* ------------------------------------------------------- article sidebar */

.header-article {
    width: 767px;
    max-width: 100%;
    text-align: right;
    padding-top: 4em;
}

.article-info {
    padding-top: 15px;
    clear: right;
    font-weight: 300;
    color: var(--text-strong);
    word-wrap: break-word;
}

.published-label {
    clear: both;
    font-size: 0.83em;
    margin: 1em 0 0;
}

.about-author {
    display: block;
    width: 85%;
    float: right;
    margin-bottom: 35px;
}

.avatar {
    float: right;
    border-radius: 50%;
    margin-left: 16px;
    margin-top: 7px;
    width: 70px;
    height: 70px;
}

/* ----------------------------------------------------------------- posts */

.content-subhead {
    text-transform: uppercase;
    color: var(--muted);
    border-bottom: 1px solid var(--rule);
    padding: 0.4em 0;
    font-size: 80%;
    font-weight: 500;
    letter-spacing: 0.1em;
}

.post {
    padding-bottom: 1em;
    border-bottom: 1px solid var(--rule);
}

.post-title {
    font-size: 1.5em;
    color: var(--text-strong);
    letter-spacing: -1px;
}

.post-meta {
    color: var(--muted);
    font-size: 90%;
    margin-top: -10px;
}

.post-category {
    margin: 0 0.1em;
    padding: 0.2em 0.6em;
    color: #fff;
    background: #6f6f6d;
    font-size: 90%;
}

/* Colourful post categories: https://coolors.co/app/518aa0-f2c43c-75626f-77aa7d-f25c84 */
.post-category:nth-child(5n+1) { background: #45788c; }
.post-category:nth-child(5n+2) { background: #8a6d10; }
.post-category:nth-child(5n+3) { background: #75626f; }
.post-category:nth-child(5n+4) { background: #4f7d56; }
.post-category:nth-child(5n+5) { background: #c22f5c; }

.hr {
    border-top: 1px solid var(--rule);
    width: 10%;
    margin-top: 20px;
}

.comments {
    padding: 50px 0 0;
}

/* -------------------------------------------------------------- archives */

.archive-item {
    padding: 10px 0;
    border-bottom: 1px solid var(--rule);
}

.archive-date {
    margin: 0;
}

.archive-post {
    line-height: 130%;
}

.archive-meta {
    color: var(--muted);
    font-size: 80%;
    margin: -1px 0 0 0;
}

/* ------------------------------------------------- tag/category/author index */

.term-list {
    list-style: none;
    padding: 0;
    display: flex;
    flex-wrap: wrap;
    gap: 0.5em 1.5em;
}

.term-count {
    color: var(--muted);
    font-size: 85%;
}

/* ------------------------------------------------------------ navigation */

.footer {
    text-align: center;
    padding: 2em 0;
    font-size: 75%;
    color: var(--muted);
}

.pagination-wrapper {
    padding-top: 6px;
}

.pagination {
    font-size: 80%;
    text-align: center;
    position: relative;
    width: 450px;
    margin: 0 auto;
    max-width: 100%;
}

.pagination-left,
.pagination-right {
    position: absolute;
    top: 0;
}
.pagination-left  { left: 0; }
.pagination-right { right: 0; }

.go-top {
    position: fixed;
    bottom: 2em;
    right: 2em;
    color: #fff;
    background-color: rgb(0 0 0 / 0.4);
    font-size: 12px;
    padding: 1em;
    opacity: 0;
    visibility: hidden;
    transition: opacity 200ms ease, visibility 200ms ease;
}

.go-top.is-visible {
    opacity: 1;
    visibility: visible;
}

.go-top:hover {
    background-color: rgb(0 0 0 / 0.7);
}

/* -------------------------------------------------------- content extras */

/* Referenced from raw HTML inside a few articles. */
.pure-img   { max-width: 100%; height: auto; }
.centered   { display: block; margin-inline: auto; }
.float-left { float: left; }
.float-right{ float: right; }

/*
 * Video embeds. fitVids used to do this with jQuery; aspect-ratio does it in CSS.
 * Browsers do not infer a ratio for iframes the way they do for images, so the ratio
 * is explicit -- 16/9 by default, overridden per embed with
 * style="--embed-ratio: 4 / 3" where the source is a different shape.
 */
.embed {
    display: block;
    width: 100%;
    height: auto;
    aspect-ratio: var(--embed-ratio, 16 / 9);
    border: 0;
}

/* ----------------------------------------------------------- small screens */

@media (max-width: 767px) {
    #layout {
        padding: 0;
    }

    .sidebar {
        position: static;
        width: 100%;
        height: 325px;
    }

    .sidebar.sidebar-article {
        height: auto;
        border-bottom: 1px solid var(--rule-strong);
        padding-bottom: 35px;
    }

    .content {
        padding: 1em 1.5em 0;
        font-size: 85%;
    }

    .cover-img {
        background-position: 0;
    }

    .cover-body {
        padding-bottom: 5%;
        padding-top: 0;
    }

    .avatar {
        width: 45px;
        height: 45px;
    }

    .about-author {
        width: 100%;
        float: none;
    }

    .header,
    .header-article {
        text-align: center;
        position: static;
    }

    .social {
        justify-content: center;
        margin-left: 0;
    }

    .hr {
        width: auto;
        margin: 25px auto;
    }
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}