@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Mono:ital,wght@0,400;0,500;0,600;1,400&family=IBM+Plex+Sans:wght@400;500;600&family=IBM+Plex+Serif:ital,wght@0,400;0,600;1,400&family=Press+Start+2P&display=swap');

/* ============================================================================
   SAKADO — a dark, editorial theme for security research.
   Near-black canvas, a single red accent, IBM Plex for text, Press Start 2P
   reserved for the wordmark and a handful of display headings.
   ========================================================================== */

:root {
    --bg:            #0a0a0a;
    --bg-card:       #0c0c0c;
    --bg-code:       #0d0d0d;
    --bg-inline:     #151515;

    --text:          #e8e8e6;
    --text-strong:   #f2f2f0;
    --text-2:        #c8c8c4;
    --text-3:        #9a9a96;
    --text-muted:    #8a8a86;
    --text-dim:      #6f6f6c;
    --text-faint:    #5f5f5c;
    --hair:          #3a3a3a;

    --accent:        #c23a30;
    --accent-soft:   rgba(194, 58, 48, 0.10);

    --border:        #1a1a1a;
    --border-2:      #222222;
    --border-hair:   #171717;

    --font-sans:     'IBM Plex Sans', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono:     'IBM Plex Mono', ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
    --font-serif:    'IBM Plex Serif', Georgia, serif;
    --font-display:  'Press Start 2P', var(--font-mono);

    --content:       820px;
    --pad:           32px;
    --radius:        0;
}

* { box-sizing: border-box; }

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

body {
    margin: 0;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    background: var(--bg);
    color: var(--text);
    font-family: var(--font-sans);
    font-size: 16px;
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

main { flex: 1 0 auto; }

a {
    color: inherit;
    text-decoration: none;
    transition: color 0.15s ease;
}

::selection { background: var(--accent); color: #fff; }

img { max-width: 100%; height: auto; }

hr {
    border: 0;
    border-top: 1px solid var(--border);
    margin: 2.5rem 0;
}

/* Shared centered column ------------------------------------------------- */
.container,
.article--container,
.lesson-container {
    width: 100%;
    max-width: var(--content);
    margin: 0 auto;
    padding: 0 var(--pad);
}

.container { padding-bottom: 72px; }

/* ============================================================================
   NAVBAR
   ========================================================================== */
.navbar { background: var(--bg); }

.navbar-inner {
    max-width: var(--content);
    margin: 0 auto;
    padding: 0 var(--pad);
}
.navbar-row {
    padding: 34px 0 30px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    border-bottom: 1px solid var(--border);
}

.navbar-logo--link {
    font-family: var(--font-display);
    font-size: 13px;
    line-height: 1;
    letter-spacing: 0.02em;
    color: var(--text-strong);
    text-transform: uppercase;
}
.navbar-logo--link:hover { color: var(--accent); }

.navbar-items {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    align-items: center;
    gap: 26px;
}

.navbar-item { display: flex; }

.navbar-item--link {
    font-family: var(--font-mono);
    font-size: 13px;
    text-transform: lowercase;
    color: var(--text-dim);
    display: inline-flex;
    align-items: center;
}
.navbar-item--link:hover { color: var(--text); }
.navbar-item--link.active,
.navbar-item--link[aria-current="page"] { color: var(--text); }

.navbar-item--search .navbar-item--link { color: var(--text-dim); }
.navbar-item--search .navbar-item--link:hover { color: var(--accent); }

/* Language switcher — a minimal <details> dropdown styled to sit flush with
   the mono nav row (code toggle + chevron, panel drops below on click). */
.navbar-item--lang { font-family: var(--font-mono); font-size: 12.5px; }
.lang-switcher { position: relative; }
.lang-switcher summary {
    list-style: none;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--text-dim);
    text-transform: uppercase;
    letter-spacing: 0.02em;
    -webkit-tap-highlight-color: transparent;
}
.lang-switcher summary::-webkit-details-marker { display: none; }
.lang-switcher summary::marker { content: ""; }
.lang-switcher summary:hover,
.lang-switcher[open] summary { color: var(--text); }
.lang-switcher summary:focus-visible { outline: 1px solid var(--border-2); outline-offset: 4px; }
.lang-switcher summary svg { color: var(--text-faint); transition: transform 0.15s ease; }
.lang-switcher[open] summary svg { transform: rotate(180deg); }
.lang-switcher--menu {
    position: absolute;
    top: calc(100% + 12px);
    right: 0;
    z-index: 90;
    margin: 0;
    padding: 5px 0;
    list-style: none;
    min-width: 66px;
    background: var(--bg-card);
    border: 1px solid var(--border-2);
}
.lang-switcher--menu li { display: block; }
.lang-switcher--menu a {
    display: block;
    padding: 7px 16px;
    color: var(--text-dim);
    text-transform: uppercase;
    letter-spacing: 0.02em;
}
.lang-switcher--menu a:hover { color: var(--text); background: rgba(255,255,255,0.02); }

/* Hamburger (mobile only) */
.navbar-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 34px;
    height: 34px;
    padding: 0;
    background: none;
    border: 1px solid var(--border-2);
    cursor: pointer;
}
.navbar-toggle-bar {
    display: block;
    width: 16px;
    height: 1.5px;
    margin: 0 auto;
    background: var(--text-2);
    transition: transform 0.2s ease, opacity 0.2s ease;
}
.navbar-toggle.active .navbar-toggle-bar:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.navbar-toggle.active .navbar-toggle-bar:nth-child(2) { opacity: 0; }
.navbar-toggle.active .navbar-toggle-bar:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

/* ============================================================================
   FOOTER
   ========================================================================== */
footer { flex-shrink: 0; }

.footer-content {
    max-width: var(--content);
    margin: 0 auto;
    padding: 0 var(--pad);
}
.footer-row {
    padding: 40px 0 48px;
    border-top: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 10px 24px;
    font-family: var(--font-mono);
    font-size: 11.5px;
    color: var(--text-faint);
}
.footer-credits a { color: var(--text-dim); text-decoration: underline; text-decoration-color: var(--hair); text-underline-offset: 2px; }
.footer-credits a:hover { color: var(--accent); }
.footer-meta { display: flex; align-items: center; gap: 12px; }
.footer-meta a { color: var(--text-dim); }
.footer-meta a:hover { color: var(--accent); }
.footer-sep { color: var(--hair); }
/* legacy alias kept for any override that still targets it */
.footer-links { display: flex; gap: 18px; }
.footer-links a { color: var(--text-dim); }
.footer-links a:hover { color: var(--accent); }

/* ============================================================================
   HOME
   ========================================================================== */
.hero {
    position: relative;
    overflow: hidden;
    margin: 0 calc(50% - 50vw);
    min-height: 600px;
    display: flex;
    align-items: flex-end;
}
.hero--image {
    position: absolute;
    inset: 0;
    z-index: 0;
}
.hero--image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.9;
    display: block;
}
.hero::after {
    content: "";
    position: absolute;
    inset: 0;
    z-index: 1;
    pointer-events: none;
    background: linear-gradient(180deg,
        rgba(10,10,10,0.30) 0%,
        rgba(10,10,10,0.55) 45%,
        rgba(10,10,10,0.90) 82%,
        var(--bg) 100%);
}
.hero__inner {
    position: relative;
    z-index: 2;
    width: 100%;
    max-width: calc(var(--content) + 2 * var(--pad));
    margin: 0 auto;
    padding: 88px var(--pad) 76px;
}
.hero__eyebrow {
    font-family: var(--font-mono);
    font-size: 12px;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--accent);
    margin: 0 0 30px;
}
.hero h1 {
    margin: 0;
    font-family: var(--font-display);
    font-size: clamp(30px, 6vw, 46px);
    line-height: 1.2;
    letter-spacing: 0.02em;
    color: var(--text-strong);
    text-shadow: 0 2px 24px rgba(0,0,0,0.8);
    text-transform: uppercase;
}
.hero .subtitle {
    font-family: var(--font-mono);
    font-size: 15px;
    color: var(--text-2);
    margin: 26px 0 0;
}
.hero p:not(.subtitle):not(.hero__eyebrow) {
    max-width: 520px;
    margin: 16px 0 0;
    font-size: 15px;
    line-height: 1.7;
    color: var(--text-3);
}

/* Home section blocks (recent articles, writeups, projects) */
.home-section { padding: 64px 0 20px; }
.home-section:last-child { padding-bottom: 8px; }
.section-eyebrow {
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: var(--accent);
    margin: 0 0 8px;
}

/* Compact "recent" list rows: date | title | tag */
.recent-list { display: flex; flex-direction: column; }
.recent-row {
    display: flex;
    align-items: baseline;
    gap: 20px;
    padding: 22px 0;
    border-top: 1px solid var(--border);
}
.recent-list .recent-row:last-child { border-bottom: 1px solid var(--border); }
.recent-row__date {
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--text-faint);
    flex: 0 0 92px;
}
.recent-row__title {
    flex: 1;
    font-size: 17px;
    color: #e0e0dc;
    min-width: 0;
}
.recent-row:hover .recent-row__title { color: var(--text-strong); }
.recent-row__tag {
    font-family: var(--font-mono);
    font-size: 11px;
    color: var(--text-faint);
    white-space: nowrap;
}
.recent-row__tag--accent { color: var(--accent); }
.home-more {
    display: inline-block;
    padding: 20px 0;
    font-family: var(--font-mono);
    font-size: 12.5px;
    color: var(--text-dim);
}
.home-more:hover { color: var(--accent); }

/* Home links / profiles */
.about-section { max-width: var(--content); padding-top: 8px; }
.profiles {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
    align-items: center;
    font-family: var(--font-mono);
    font-size: 13px;
    padding-top: 8px;
}
.profile-link { color: var(--text-2); }
.profile-link:hover { color: var(--accent); }

/* ============================================================================
   PAGE HEADERS (list + generic pages)
   ========================================================================== */
.page-header { padding: 56px 0 34px; }
.page-header__eyebrow,
.tag-page__eyebrow {
    font-family: var(--font-mono);
    font-size: 12px;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--accent);
    margin: 0 0 22px;
}
.page-header h1 {
    margin: 0;
    font-family: var(--font-display);
    font-size: clamp(18px, 3.4vw, 22px);
    line-height: 1.6;
    color: var(--text-strong);
    text-transform: none;
}
.page-header p:not(.tag-page__eyebrow):not(.page-header__eyebrow) {
    max-width: 560px;
    margin: 28px 0 0;
    font-size: 16px;
    line-height: 1.7;
    color: var(--text-3);
}
/* Small mono meta line under a list header (e.g. cert count / date range) */
.page-header__note {
    margin-top: 26px;
    font-family: var(--font-mono);
    font-size: 12px;
    letter-spacing: 0.04em;
    color: var(--text-faint);
}
.page-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 8px 16px;
    margin-top: 22px;
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--text-faint);
}

/* Toolbar row inside some list headers (per-page + category selectors) */
.list-toolbar {
    display: flex;
    align-items: center;
    gap: 16px;
    flex-wrap: wrap;
}

/* Horizontal category filter + result count (articles / writeups list) */
.filter-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    flex-wrap: wrap;
    padding: 14px 0 6px;
    border-top: 1px solid var(--border);
}
.filter-bar__cats {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
    font-family: var(--font-mono);
    font-size: 12.5px;
}
.filter-bar__cat { color: #7a7a76; }
.filter-bar__cat:hover { color: var(--text); }
.filter-bar__cat.is-active { color: var(--text-strong); }
.filter-bar__count {
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--text-faint);
    white-space: nowrap;
}

/* ============================================================================
   POST ROWS (articles, writeups, tag/search results)
   The .articles-grid container is a vertical stack of editorial rows.
   ========================================================================== */
.articles-grid { display: flex; flex-direction: column; }

.article_card {
    display: block;
    padding: 30px 0;
    border-top: 1px solid var(--border);
}
.articles-grid > .article_card:last-child { border-bottom: 1px solid var(--border); }

.article_card--meta {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 10px;
    font-family: var(--font-mono);
    font-size: 11.5px;
    color: var(--text-dim);
    margin-bottom: 14px;
}
.article_card--category { color: var(--accent); }
.article_card--sep { color: var(--hair); }
.article_card--date,
.article_card--reading-time { color: var(--text-dim); }

.article_card--title {
    margin: 0;
    font-size: 22px;
    font-weight: 600;
    line-height: 1.3;
    color: var(--text-strong);
}
.article_card--description {
    margin: 10px 0 16px;
    font-size: 15px;
    line-height: 1.65;
    color: var(--text-3);
    max-width: 640px;
}
.article_card--tags {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    font-family: var(--font-mono);
    font-size: 12px;
    color: #7a7a76;
}
.article_card--tag::before { content: "#"; color: var(--accent); }

/* ============================================================================
   ARCHIVE (year-grouped lists)
   ========================================================================== */
.archive { display: flex; flex-direction: column; gap: 8px; }
.archive__year { padding-top: 8px; }
.archive__year-header {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 28px 0 2px;
}
.archive__year-label {
    font-family: var(--font-display);
    font-size: 13px;
    color: var(--text-strong);
}
.archive__year-rule {
    flex: 1;
    height: 1px;
    background: var(--border);
}
.archive__year-count {
    font-family: var(--font-mono);
    font-size: 11.5px;
    color: var(--text-faint);
}

/* ============================================================================
   ARTICLE / WRITEUP / LESSON DETAIL
   ========================================================================== */
.article--container { padding-bottom: 24px; }
.article--wrapper { min-width: 0; }

/* When the article/lesson sits inside an outer centered wrapper, don't
   re-apply the column max-width + padding (that would double-indent). */
.lesson-container .article--container {
    max-width: none;
    margin: 0;
    padding-left: 0;
    padding-right: 0;
}

.breadcrumb {
    padding: 26px 0 0;
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--text-faint);
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    align-items: center;
}
.breadcrumb a { color: var(--text-faint); }
.breadcrumb a:hover { color: var(--accent); }
.breadcrumb > span:last-child { color: var(--accent); }
.breadcrumb-separator { color: var(--hair); }

.article-header {
    padding: 26px 0 36px;
    border-bottom: 1px solid var(--border);
}
/* Lesson detail: the grid already supplies the 26px top gap, so the main
   column header sits flush with the sidebar (design: main header padding 0 0 30px). */
.lesson-detail-grid .article-header { padding: 0 0 30px; }
/* Course-tree headers (module_list / lesson_list / lesson_detail) use the
   34px / 16px sizes; post detail (article / writeup) bumps to 38px / 18px. */
.article-header h1 {
    margin: 0 0 20px;
    font-size: clamp(26px, 4.5vw, 34px);
    line-height: 1.2;
    font-weight: 600;
    letter-spacing: -0.01em;
    color: var(--text-strong);
}
.article--container .article-header h1 { font-size: clamp(28px, 5vw, 38px); }
.article-header > p:not(.content-header__label) {
    margin: 0 0 22px;
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-3);
}
.article--container .article-header > p:not(.content-header__label) { font-size: 18px; }
.article-header-meta {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px 14px;
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--text-dim);
}
.article-meta-item {
    display: inline-flex;
    align-items: baseline;
    gap: 6px;
}
.article-meta-item strong {
    font-weight: 500;
    color: var(--text-faint);
}
.article-meta-sep { color: var(--hair); }
.article-meta-badge { color: var(--accent); }
.reading-time { color: var(--text-dim); }

.article-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px 18px;
    margin-top: 22px;
}
.article-tag {
    font-family: var(--font-mono);
    font-size: 12.5px;
    color: #7a7a76;
}
.article-tag::before { content: "#"; color: var(--accent); }
.article-tag:hover { color: var(--text); }

.article--picture-wrapper {
    margin: 34px 0 0;
    border: 1px solid var(--border);
}
.article--picture-wrapper img { display: block; width: 100%; }

.article--content { padding-top: 34px; }

/* End-of-post footer */
.post-footer {
    margin-top: 20px;
    padding-top: 8px;
}
.post-footer__tags {
    display: flex;
    flex-wrap: wrap;
    align-items: baseline;
    gap: 10px 14px;
    padding: 26px 0;
    border-top: 1px solid var(--border);
}
.post-footer__label {
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--text-faint);
}
.post-footer__meta {
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--text-faint);
    margin: 0 0 4px;
}
.post-footer__meta time { color: var(--text-dim); }
.post-footer__related {
    margin-top: 30px;
    padding-top: 26px;
    border-top: 1px solid var(--border);
}
.post-footer__related-title {
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: var(--accent);
    margin: 0 0 18px;
}
.post-footer__related-list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
}
.post-footer__related-item { border-top: 1px solid var(--border-hair); }
.post-footer__related-item:first-child { border-top: 0; }
.post-footer__related-link {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 18px;
    flex-wrap: wrap;
    padding: 16px 0;
}
.post-footer__related-link-title { font-size: 15px; color: var(--text-2); }
.post-footer__related-link:hover .post-footer__related-link-title { color: var(--text-strong); }
.post-footer__related-link-meta {
    font-family: var(--font-mono);
    font-size: 11.5px;
    color: var(--text-faint);
    white-space: nowrap;
}

/* Simple prev/next after a post/lesson */
.lesson-navigation,
.post-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 40px;
    padding: 26px 0;
    border-top: 1px solid var(--border);
    font-family: var(--font-mono);
    font-size: 12.5px;
}
.lesson-nav-link { color: var(--text-dim); }
.lesson-nav-link:hover { color: var(--accent); }
.lesson-nav-link.disabled { color: var(--hair); pointer-events: none; }

.mark-read-btn {
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--text-2);
    background: none;
    border: 1px solid var(--border-2);
    padding: 8px 16px;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    transition: border-color 0.15s ease, color 0.15s ease;
}
.mark-read-btn:hover { border-color: var(--accent); color: var(--text-strong); }
.mark-read-btn .mark-read-icon { color: var(--text-faint); }
.mark-read-btn.is-read { border-color: var(--accent); color: var(--text-strong); }
.mark-read-btn.is-read .mark-read-icon { color: var(--accent); }

/* ============================================================================
   TABLE OF CONTENTS + READING AIDS
   ========================================================================== */
.article--container:has(.toc) {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 220px;
    gap: 48px;
    align-items: start;
}
.article--container:has(.toc) > .article--wrapper { grid-column: 1; }
/* The TOC script hides itself when a post has no headings; collapse back
   to a single column so the body doesn't leave an empty right rail. */
.article--container:has(.toc[style*="display: none"]) { display: block; }

.toc {
    position: sticky;
    top: 24px;
    border-left: 1px solid var(--border);
    padding-left: 24px;
}
.toc h3 {
    font-family: var(--font-mono);
    font-size: 10.5px;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--text-faint);
    margin: 6px 0 14px;
    font-weight: 500;
}
.toc ul { list-style: none; margin: 0; padding: 0; }
.toc li { margin: 0; }
.toc a {
    display: block;
    padding: 7px 0 7px 10px;
    font-size: 13.5px;
    line-height: 1.4;
    color: var(--text-muted);
    border-left: 2px solid transparent;
    margin-left: -2px;
    transition: color 0.15s ease, border-color 0.15s ease;
}
.toc a:hover { color: var(--text); }
.toc a.active { color: var(--text-strong); border-left-color: var(--accent); }

.reading-progress {
    position: fixed;
    top: 0; left: 0; right: 0;
    height: 2px;
    z-index: 60;
    background: transparent;
    pointer-events: none;
}
.reading-progress__bar {
    display: block;
    height: 100%;
    width: 100%;
    transform: scaleX(0);
    transform-origin: 0 50%;
    background: var(--accent);
}
.back-to-top {
    position: fixed;
    right: 24px;
    bottom: 24px;
    width: 40px;
    height: 40px;
    z-index: 55;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-card);
    color: var(--text-2);
    border: 1px solid var(--border-2);
    cursor: pointer;
    opacity: 0;
    transform: translateY(8px);
    pointer-events: none;
    transition: opacity 0.2s ease, transform 0.2s ease, border-color 0.15s ease, color 0.15s ease;
}
.back-to-top.is-visible { opacity: 1; transform: none; pointer-events: auto; }
.back-to-top:hover { border-color: var(--accent); color: var(--text-strong); }

/* Lesson detail: two-column body (content + sibling-lesson nav) */
.lesson-container { padding-bottom: 24px; }
.lesson-detail-grid {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 220px;
    gap: 48px;
    align-items: start;
    padding-top: 26px;
}
.lesson-detail-grid > .article--wrapper { grid-column: 1; }
.lesson-sidebar {
    position: sticky;
    top: 24px;
    border-left: 1px solid var(--border);
    padding-left: 24px;
}
.lesson-sidebar__more {
    margin-top: 22px;
    padding-top: 16px;
    border-top: 1px solid var(--border);
}
.lesson-sidebar__more a {
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--text-dim);
}
.lesson-sidebar__more a:hover { color: var(--accent); }
.lesson-sidebar__label {
    font-family: var(--font-mono);
    font-size: 10.5px;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--text-faint);
    margin-bottom: 14px;
}
.lesson-sidebar__list { display: flex; flex-direction: column; font-size: 13.5px; }
.lesson-sidebar__list a { padding: 7px 0; color: var(--text-muted); }
.lesson-sidebar__list a:hover { color: var(--text); }
.lesson-sidebar__list a.is-current {
    color: var(--text-strong);
    border-left: 2px solid var(--accent);
    margin-left: -2px;
    padding-left: 10px;
}

/* ============================================================================
   CERTIFICATIONS
   ========================================================================== */
.certifications-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: 16px;
    padding-top: 8px;
    /* default align-items: stretch → every card in a row is the same height */
}
.certification-card {
    border: 1px solid var(--border);
    background: var(--bg-card);
    padding: 24px;
    display: flex;
    flex-direction: column;
}
/* Whole-card link (when the cert points to an article or its official page) */
.certification-card--link { position: relative; transition: border-color 0.15s ease; }
.certification-card--link:hover { border-color: var(--border-2); }
.certification-card__stretched {
    position: absolute;
    inset: 0;
    z-index: 1;
    border: 0;
}
.certification-card__head {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 12px;
}
.certification-card__logo {
    width: 60px;
    height: 60px;
    border: 1px solid var(--border-2);
    background: var(--bg);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    flex-shrink: 0;
}
.certification-card__logo img { width: 100%; height: 100%; object-fit: contain; }
.certification-card__logo--empty span {
    font-family: var(--font-mono);
    font-size: 15px;
    color: var(--text-faint);
    letter-spacing: 0.04em;
}
.certification-card__year,
.certification-card__date {
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--text-faint);
}
.certification-card__code {
    margin-top: 22px;
    font-size: 18px;
    line-height: 1.35;
    color: var(--text-strong);
}
.certification-card__code h3 { margin: 0; font: inherit; font-weight: 600; }
/* Short codes (acronyms like OSCP / CRTO) get the display font; the
   template adds this modifier when the name is short enough to suit it. */
.certification-card__code--acronym {
    font-family: var(--font-display);
    font-size: 17px;
    letter-spacing: 0.02em;
}
.certification-card__issuer,
.certification-card__fullname {
    display: block;
    margin-top: 12px;
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--text-3);
    line-height: 1.5;
}
.certification-card__desc {
    margin: 16px 0 0;
    font-size: 14px;
    line-height: 1.6;
    color: #7a7a76;
    font-style: italic;
}
.certification-card__link {
    margin-top: 18px;
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--text-2);
    display: inline-flex;
    align-items: center;
    gap: 8px;
}
.certification-card__link:hover { color: var(--accent); }
.certification-card__link-arrow { color: var(--accent); }

/* ============================================================================
   CVE TABLE
   ========================================================================== */
.cve-table-wrap { overflow-x: auto; padding-top: 8px; }
.cve-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 14px;
}
.cve-table thead th {
    text-align: left;
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    font-weight: 500;
    color: var(--text-faint);
    padding: 0 16px 14px 0;
    border-bottom: 1px solid var(--border);
}
.cve-table__row { border-bottom: 1px solid var(--border-hair); }
.cve-table__row:hover { background: rgba(255,255,255,0.015); }
.cve-table td { padding: 16px 16px 16px 0; vertical-align: middle; }
.cve-table__id { font-family: var(--font-mono); font-size: 13px; color: var(--text-2); white-space: nowrap; }
.cve-table__id a { color: var(--text); text-decoration: underline; text-decoration-color: var(--hair); text-underline-offset: 3px; }
.cve-table__id a:hover { color: var(--accent); }
.cve-table__product { color: var(--text-3); }
.cve-table__date { font-family: var(--font-mono); font-size: 12.5px; color: var(--text-faint); white-space: nowrap; }
.cve-score {
    font-family: var(--font-mono);
    font-size: 12.5px;
    font-weight: 600;
    padding: 2px 8px;
    border: 1px solid var(--border-2);
    color: var(--text-2);
    display: inline-block;
}
.cve-score--critical { color: #e5675c; border-color: rgba(194,58,48,0.5); background: var(--accent-soft); }
.cve-score--high     { color: #d98a4a; border-color: rgba(217,138,74,0.4); }
.cve-score--medium   { color: #cbb26a; border-color: rgba(203,178,106,0.35); }
.cve-score--low      { color: #7fbf7f; border-color: rgba(127,191,127,0.35); }
.cve-score--none     { color: var(--text-faint); }

/* ============================================================================
   COURSES (list rows) — editorial rows, meta above the title (like posts)
   ========================================================================== */
.course-grid { display: flex; flex-direction: column; padding-top: 6px; }

.course-card {
    display: block;
    padding: 30px 0;
    border-top: 1px solid var(--border);
}
.course-grid > .course-card:last-child { border-bottom: 1px solid var(--border); }

.course-card__meta {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 14px;
    font-family: var(--font-mono);
    font-size: 11.5px;
    color: var(--text-dim);
    margin-bottom: 14px;
}
.course-card__meta-cat { color: var(--accent); }
.course-card__meta-sep { color: var(--hair); }
.course-card__title {
    margin: 0;
    font-size: 22px;
    font-weight: 600;
    line-height: 1.3;
    color: var(--text-strong);
}
.course-card__desc {
    margin: 10px 0 0;
    font-size: 15px;
    line-height: 1.65;
    color: var(--text-3);
    max-width: 640px;
}

/* ============================================================================
   MODULES (list rows) — order | title+desc | lesson count
   ========================================================================== */
.module-list { display: flex; flex-direction: column; padding-top: 8px; }
.module-item {
    display: grid;
    grid-template-columns: 52px 1fr auto;
    gap: 24px;
    align-items: baseline;
    padding: 26px 0;
    border-top: 1px solid var(--border);
}
.module-list > .module-item:last-child { border-bottom: 1px solid var(--border); }
.module-order {
    font-family: var(--font-mono);
    font-size: 15px;
    color: var(--accent);
}
.module-item-content h3 {
    margin: 0;
    font-size: 18px;
    font-weight: 500;
    line-height: 1.35;
    color: #efeaf2;
}
.module-item:hover .module-item-content h3 { color: var(--text-strong); }
.module-item-content p {
    margin: 6px 0 0;
    font-size: 14px;
    line-height: 1.55;
    color: var(--text-muted);
    max-width: 560px;
}
.module-lesson-count {
    font-family: var(--font-mono);
    font-size: 11.5px;
    color: var(--text-faint);
    white-space: nowrap;
}

/* ============================================================================
   LESSONS (list rows) — order | title+desc | reading time
   ========================================================================== */
.lesson-list { display: flex; flex-direction: column; padding-top: 8px; }
.lesson-item {
    display: grid;
    grid-template-columns: auto 1fr auto;
    gap: 22px;
    align-items: baseline;
    padding: 24px 0;
    border-top: 1px solid var(--border);
}
.lesson-list > .lesson-item:last-child { border-bottom: 1px solid var(--border); }
.lesson-order {
    font-family: var(--font-mono);
    font-size: 13px;
    color: var(--text-faint);
}
.lesson-item-content h4 {
    margin: 0;
    font-size: 17px;
    font-weight: 500;
    color: #efeaf2;
}
.lesson-item:hover .lesson-item-content h4 { color: var(--text-strong); }
.lesson-item-content p {
    margin: 5px 0 0;
    font-size: 13.5px;
    line-height: 1.5;
    color: var(--text-muted);
}
.lesson-item-aside {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 6px;
    text-align: right;
}
.lesson-reading-time {
    font-family: var(--font-mono);
    font-size: 11.5px;
    color: var(--text-faint);
    white-space: nowrap;
}
.lesson-read-badge {
    font-family: var(--font-mono);
    font-size: 11px;
    color: var(--accent);
    opacity: 0;
    white-space: nowrap;
}
.lesson-item.is-read .lesson-read-badge { opacity: 1; }
.lesson-item.is-read .lesson-order { color: var(--accent); }
.lessons-progress { color: var(--accent); }

/* ============================================================================
   PROJECTS + MEMBERS
   ========================================================================== */
.projects {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 16px;
    padding-top: 8px;
}
.project-card {
    display: block;
    border: 1px solid var(--border);
    background: var(--bg-card);
    padding: 24px;
    transition: border-color 0.15s ease;
}
.project-card:hover { border-color: var(--border-2); }
.project-card h3 {
    margin: 0 0 10px;
    font-size: 18px;
    font-weight: 600;
    color: var(--text-strong);
}
.project-card p {
    margin: 0;
    font-size: 14.5px;
    line-height: 1.6;
    color: var(--text-3);
}
.member-role {
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--accent);
    margin: 0 0 10px !important;
}
.member-links {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    margin-top: 16px;
    font-family: var(--font-mono);
    font-size: 12.5px;
}
.member-links a { color: var(--text-2); }
.member-links a:hover { color: var(--accent); }

/* ============================================================================
   SEARCH + TAG PAGES
   ========================================================================== */
.search-form { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 26px; }
.search-form__input {
    flex: 1;
    min-width: 240px;
    background: var(--bg-card);
    border: 1px solid var(--border-2);
    color: var(--text);
    font-family: var(--font-mono);
    font-size: 14px;
    padding: 12px 14px;
}
.search-form__input:focus { outline: none; border-color: var(--accent); }
.search-form__input::placeholder { color: var(--text-faint); }
.search-form__button {
    font-family: var(--font-mono);
    font-size: 13px;
    color: var(--text-strong);
    background: none;
    border: 1px solid var(--border-2);
    padding: 12px 22px;
    cursor: pointer;
    transition: border-color 0.15s ease, color 0.15s ease;
}
.search-form__button:hover { border-color: var(--accent); color: var(--accent); }
.search-summary {
    font-family: var(--font-mono);
    font-size: 12.5px;
    color: var(--text-dim);
    margin: 26px 0 8px;
}
.search-group__title,
.tag-page__group-title {
    display: flex;
    align-items: baseline;
    gap: 12px;
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: var(--accent);
    margin: 40px 0 8px;
    font-weight: 500;
}
.search-group__count,
.tag-page__group-count { color: var(--text-faint); letter-spacing: 0; }
.tag-page__group { margin-top: 8px; }

/* ============================================================================
   SELECTORS + PAGINATION
   ========================================================================== */
.category-selector,
.per-page-form__select {
    background: var(--bg-card);
    border: 1px solid var(--border-2);
    color: var(--text-2);
    font-family: var(--font-mono);
    font-size: 12.5px;
    padding: 8px 10px;
    cursor: pointer;
}
.category-selector:focus,
.per-page-form__select:focus { outline: none; border-color: var(--accent); }
.per-page-form {
    display: inline-flex;
    align-items: center;
    gap: 8px;
}
.per-page-form__label {
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--text-faint);
}
.per-page-form__submit {
    font-family: var(--font-mono);
    font-size: 12px;
    background: none;
    border: 1px solid var(--border-2);
    color: var(--text-2);
    padding: 7px 12px;
    cursor: pointer;
}

.pagination {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 40px;
    padding-top: 26px;
    border-top: 1px solid var(--border);
    font-family: var(--font-mono);
    font-size: 12.5px;
}
.pagination__link { color: var(--text-2); }
.pagination__link:hover { color: var(--accent); }
.pagination__disabled { color: var(--hair); pointer-events: none; }
.pagination__status { color: var(--text-faint); }

/* ============================================================================
   PASSWORD-PROTECTED + MAINTENANCE + MESSAGES
   ========================================================================== */
.password-form {
    max-width: 420px;
    margin: 60px auto;
    padding: 34px;
    border: 1px solid var(--border);
    background: var(--bg-card);
}
.password-form h2 {
    margin: 0 0 6px;
    font-family: var(--font-display);
    font-size: 15px;
    color: var(--text-strong);
    line-height: 1.6;
}
.password-form p { color: var(--text-3); }
.password-form input[type="password"] {
    width: 100%;
    background: var(--bg);
    border: 1px solid var(--border-2);
    color: var(--text);
    font-family: var(--font-mono);
    font-size: 14px;
    padding: 12px 14px;
    margin-bottom: 12px;
}
.password-form input[type="password"]:focus { outline: none; border-color: var(--accent); }
.password-form button {
    width: 100%;
    font-family: var(--font-mono);
    font-size: 13px;
    color: var(--text-strong);
    background: none;
    border: 1px solid var(--border-2);
    padding: 12px;
    cursor: pointer;
    transition: border-color 0.15s ease, color 0.15s ease;
}
.password-form button:hover { border-color: var(--accent); color: var(--accent); }

.message-wrapper {
    padding: 40px 0;
    font-family: var(--font-mono);
    font-size: 13.5px;
    color: var(--text-dim);
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}

.maintenance {
    max-width: var(--content);
    margin: 0 auto;
    padding: 120px var(--pad);
    text-align: center;
}
.maintenance h1 {
    font-family: var(--font-display);
    font-size: 22px;
    color: var(--text-strong);
    line-height: 1.6;
}
.maintenance p { color: var(--text-3); margin-top: 20px; }

/* ============================================================================
   CONTENT HEADER LABEL (small mono kicker above a detail h1)
   e.g. "Module 01", "Lesson 1.2 · 15 min"
   ========================================================================== */
.content-header__label {
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--text-dim);
    margin-bottom: 12px;
}

/* ============================================================================
   TALKS (page content — paste into a Page)
   ========================================================================== */
.talks-list { display: flex; flex-direction: column; padding-top: 8px; }
.talk-row {
    display: grid;
    grid-template-columns: 112px 1fr auto;
    gap: 24px;
    align-items: baseline;
    padding: 26px 0;
    border-top: 1px solid var(--border);
}
.talks-list > .talk-row:last-child { border-bottom: 1px solid var(--border); }
.talk-year {
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--text-faint);
}
.talk-title { font-size: 18px; color: #efeaf2; }
.talk-desc { font-size: 14px; color: var(--text-muted); margin-top: 6px; }
.talk-venue {
    font-family: var(--font-mono);
    font-size: 11.5px;
    color: var(--text-faint);
    margin-top: 12px;
}
.talk-link {
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--text-2);
    white-space: nowrap;
}
.talk-link:hover { color: var(--accent); }
.talk-link--muted { color: #4a4a47; pointer-events: none; }

/* ============================================================================
   WHOAMI (page content — paste into a Page)
   Only class-on-<div>/<span>/<p>/<a> is allowed through the HTML sanitizer,
   so this layout avoids dl/dt/dd/figure/figcaption entirely.
   ========================================================================== */
.whoami-banner {
    position: relative;
    overflow: hidden;
    margin: 0 calc(50% - 50vw);
    height: 240px;
}
.whoami-banner img {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    z-index: 0;
}
.whoami-banner::after {
    content: "";
    position: absolute;
    inset: 0;
    z-index: 1;
    pointer-events: none;
    background: linear-gradient(180deg, rgba(10,10,10,0.10) 0%, rgba(10,10,10,0.50) 70%, var(--bg) 100%);
}
.whoami-head { padding: 44px 0 40px; }
.whoami-eyebrow {
    font-family: var(--font-mono);
    font-size: 12px;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--text-dim);
    margin: 0 0 22px;
}
.whoami-name {
    margin: 0;
    font-family: var(--font-display);
    font-size: clamp(20px, 4vw, 26px);
    line-height: 1.5;
    color: var(--text-strong);
    text-transform: none;
}
.whoami-role {
    font-family: var(--font-mono);
    font-size: 13.5px;
    color: var(--text-muted);
    margin: 18px 0 0;
}
.whoami-sep { color: #2e2e2e; }
.whoami-figure { float: right; margin: 6px 0 20px 32px; width: 150px; }
.whoami-figure img { width: 150px; height: 150px; object-fit: cover; display: block; border: 1px solid var(--border); margin: 0; }
.whoami-figure__cap {
    font-family: var(--font-mono);
    font-size: 10.5px;
    color: var(--text-faint);
    margin-top: 9px;
}
.whoami-intro {
    max-width: 600px;
    margin: 30px 0 0;
    font-size: 16px;
    line-height: 1.8;
    color: var(--text-3);
}
.whoami-intro + .whoami-intro { margin-top: 20px; }
.whoami-focus,
.whoami-notes { padding: 6px 0 4px; border-top: 1px solid var(--border); }
.whoami-block-label {
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 0.16em;
    color: var(--accent);
    margin: 30px 0 4px;
}
.whoami-notes .whoami-block-label { margin-bottom: 20px; }
.whoami-focus__grid {
    display: grid;
    grid-template-columns: 200px 1fr;
    gap: 20px 32px;
    padding: 26px 0 30px;
}
.whoami-focus__term { font-size: 17px; color: var(--text-strong); }
.whoami-focus__desc {
    font-size: 15px;
    line-height: 1.7;
    color: var(--text-muted);
}
.whoami-focus__grid > .whoami-focus__rule { border-top: 1px solid var(--border-hair); padding-top: 26px; }
.whoami-notes__grid {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 14px 26px;
    align-items: baseline;
    padding-bottom: 34px;
}
.whoami-notes__term {
    font-family: var(--font-mono);
    font-size: 12.5px;
    color: var(--text-dim);
    white-space: nowrap;
}
.whoami-notes__desc { font-size: 15px; color: var(--text-2); }

@media (max-width: 680px) {
    .talk-row { grid-template-columns: 1fr auto; }
    .talk-year { grid-column: 1 / -1; }
    .whoami-focus__grid,
    .whoami-notes__grid { grid-template-columns: 1fr; gap: 6px 0; }
    .whoami-focus__grid > .whoami-focus__rule { border-top: 0; padding-top: 8px; }
}

/* ============================================================================
   ERROR PAGES
   ========================================================================== */
.error-page {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    justify-content: center;
    max-width: 560px;
    margin: 0 auto;
    padding: 100px var(--pad);
    width: 100%;
}
.error-status {
    font-family: var(--font-mono);
    font-size: 12px;
    letter-spacing: 0.16em;
    color: var(--accent);
    margin-bottom: 26px;
}
.error-code {
    font-family: var(--font-display);
    font-size: clamp(40px, 12vw, 52px);
    line-height: 1.2;
    color: var(--text-strong);
    margin: 0;
}
.error-lead {
    margin: 32px 0 0;
    font-size: 19px;
    line-height: 1.6;
    color: #d0d0cc;
}
.error-message {
    margin: 14px 0 0;
    font-size: 16px;
    line-height: 1.7;
    color: var(--text-3);
}
.error-links {
    display: flex;
    gap: 28px;
    flex-wrap: wrap;
    margin-top: 38px;
    font-family: var(--font-mono);
    font-size: 14px;
}
.error-links a { color: var(--text-3); }
.error-links a:first-child { color: #e0e0dc; }
.error-links a:hover { color: var(--accent); }

/* ============================================================================
   CODE-BLOCK FRAME (built by script.js around markdown <pre>)
   ========================================================================== */
.code-block-frame {
    margin: 0 0 24px;
    border: 1px solid #1c1c1c;
    background: var(--bg-code);
}
.code-block-frame__bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 8px 14px;
    border-bottom: 1px solid var(--border);
    font-family: var(--font-mono);
    font-size: 11px;
}
.code-block-frame__bar--no-lang { justify-content: flex-end; }
.code-block-frame__lang {
    color: var(--text-faint);
    text-transform: lowercase;
    letter-spacing: 0.04em;
}
.code-block-frame__copy {
    font-family: var(--font-mono);
    font-size: 11px;
    color: var(--text-dim);
    background: none;
    border: 0;
    cursor: pointer;
    padding: 0;
    transition: color 0.15s ease;
}
.code-block-frame__copy:hover { color: var(--text-2); }
.code-block-frame__copy.is-copied { color: var(--accent); }
.code-block-frame > pre { margin: 0 !important; border: 0 !important; }

/* Heading anchors (added by script.js) */
.heading-anchor {
    opacity: 0;
    margin-left: 10px;
    color: var(--text-faint);
    transition: opacity 0.15s ease, color 0.15s ease;
}
.heading-anchor::before { content: "#"; }
.markdown-body h2:hover .heading-anchor,
.markdown-body h3:hover .heading-anchor,
.markdown-body h4:hover .heading-anchor { opacity: 1; }
.heading-anchor:hover { color: var(--accent); }
.heading-anchor.is-copied { opacity: 1; color: var(--accent); }

/* ============================================================================
   RESPONSIVE
   ========================================================================== */
@media (max-width: 860px) {
    .article--container:has(.toc),
    .lesson-detail-grid {
        grid-template-columns: 1fr;
        gap: 0;
    }
    .toc, .lesson-sidebar { display: none; }
}

@media (max-width: 680px) {
    body { font-size: 15.5px; }

    .navbar-toggle { display: flex; }
    .navbar-items {
        position: fixed;
        inset: 0;
        z-index: 80;
        flex-direction: column;
        align-items: flex-start;
        justify-content: center;
        gap: 8px;
        padding: 32px;
        background: var(--bg);
        transform: translateX(100%);
        transition: transform 0.25s ease;
        border-bottom: 0;
    }
    .navbar-items.active { transform: none; }
    .navbar-item { width: 100%; padding: 6px 0; border-bottom: 1px solid var(--border); }
    .navbar-item--link { font-size: 16px; }

    .hero { min-height: 420px; }
    .hero__inner { padding: 64px var(--pad) 48px; }

    .recent-row { flex-wrap: wrap; gap: 6px 16px; }
    .recent-row__date { flex-basis: auto; }
    .recent-row__title { flex-basis: 100%; order: 3; }

    .lesson-item { grid-template-columns: auto 1fr; }
    .lesson-read-badge { grid-column: 2; }

    .error-page { padding: 72px var(--pad); }
}

@media (prefers-reduced-motion: reduce) {
    * { scroll-behavior: auto !important; }
    .reading-progress__bar, .back-to-top, .navbar-items { transition: none !important; }
}