/* ============================================================
   Architecture Log — single mobile-first stylesheet.
   No frameworks. Pure CSS: custom properties, Flexbox, Grid,
   clamp() fluid type, one breakpoint. Palette from the logo.
   ============================================================ */

:root {
    /* Brand palette (from logo) */
    --color-primary:   #0a7ea5;
    --color-primary-d: #015e7c;
    --color-deep:      #003348;
    --color-ink:       #001a2d;
    --color-ink-soft:  #2b4258;
    --color-bg:        #ffffff;
    --color-surface:   #f4f7f9;
    --color-border:    #dbe4ea;
    --color-on-deep:   #eaf3f7;

    /* Fluid type scale */
    --step--1: clamp(0.83rem, 0.80rem + 0.15vw, 0.92rem);
    --step-0:  clamp(1rem,    0.95rem + 0.25vw, 1.13rem);
    --step-1:  clamp(1.2rem,  1.10rem + 0.5vw,  1.5rem);
    --step-2:  clamp(1.45rem, 1.25rem + 1vw,    2rem);
    --step-3:  clamp(1.9rem,  1.45rem + 2.2vw,  3.25rem);

    /* Spacing & layout */
    --space:    1rem;
    --space-lg: clamp(2.5rem, 1.5rem + 4vw, 5rem);
    --maxw:     72rem;
    --measure:  68ch;
    --radius:   10px;

    --font-sans: system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

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

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

body {
    margin: 0;
    font-family: var(--font-sans);
    font-size: var(--step-0);
    line-height: 1.7;
    color: var(--color-ink);
    background: var(--color-bg);
    -webkit-font-smoothing: antialiased;
    /* Sticky footer: fill the viewport and let <main> grow */
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}
#main { flex: 1 0 auto; }
.site-footer { flex-shrink: 0; }

img, svg { max-width: 100%; height: auto; display: block; }

a { color: var(--color-primary); text-decoration: none; }
a:hover { color: var(--color-primary-d); text-decoration: underline; }

h1, h2, h3 { line-height: 1.2; color: var(--color-deep); margin: 0 0 0.5em; }

.container {
    width: 100%;
    max-width: var(--maxw);
    margin-inline: auto;
    padding-inline: 1.25rem;
}

.brand__accent { color: var(--color-primary); }

/* ---------- Header / nav ---------- */
.site-header {
    background: var(--color-bg);
    color: var(--color-ink);
    border-bottom: 1px solid var(--color-border);
    position: sticky;
    top: 0;
    z-index: 10;
}
/* Keyboard accessibility: jump straight to <main id="main">; visible only when focused. */
.skip-link {
    position: absolute;
    left: 0.75rem;
    top: 0.5rem;
    z-index: 100;
    background: var(--color-deep);
    color: #fff;
    padding: 0.55rem 1rem;
    border-radius: var(--radius);
    font-weight: 600;
    transform: translateY(-150%);
    transition: transform 0.15s ease;
}
.skip-link:focus { transform: translateY(0); outline: 2px solid #fff; outline-offset: 2px; }
.site-header__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    min-height: 64px;
}
.brand { display: inline-flex; align-items: center; flex: 0 0 auto; }
.brand:hover { text-decoration: none; }
.brand__logo { width: 44px; height: auto; }

/* ---------- Search ---------- */
.search {
    flex: 0 1 22rem;
    min-width: 0;
    margin-left: auto;       /* push search + nav to the right of the logo */
    position: relative;
    display: flex;
    align-items: center;
}
.search__input {
    width: 100%;
    font: inherit;
    font-size: var(--step--1);
    color: var(--color-ink);
    padding: 0.5rem 2.5rem 0.5rem 0.85rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    background: var(--color-surface);
    -webkit-appearance: none;
    appearance: none;
}
.search__input::placeholder { color: var(--color-ink-soft); }
.search__input:focus {
    outline: none;
    border-color: var(--color-primary);
    background: #fff;
    box-shadow: 0 0 0 3px rgba(10, 126, 165, 0.18);
}
.search__btn {
    position: absolute;
    right: 0.3rem;
    top: 50%;
    transform: translateY(-50%);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 1.9rem;
    height: 1.9rem;
    padding: 0;
    border: none;
    border-radius: 6px;
    background: transparent;
    color: var(--color-primary-d);
    cursor: pointer;
}
.search__btn:hover { color: var(--color-primary); background: var(--color-surface); }
/* Full-width variant used on the search-results page */
.search--page { flex: none; margin-left: 0; max-width: 32rem; margin-bottom: 1.5rem; }

.nav { position: relative; flex: 0 0 auto; }
.nav__checkbox {            /* visually hidden but still keyboard-focusable */
    position: absolute;
    width: 1px; height: 1px;
    opacity: 0;
    margin: 0;
}
.nav__toggle {
    display: inline-block;
    cursor: pointer;
    padding: 0.45rem 0.9rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    color: var(--color-deep);
    font-weight: 600;
    font-size: var(--step--1);
    user-select: none;
}
.nav__checkbox:focus-visible + .nav__toggle { outline: 3px solid var(--color-primary); outline-offset: 2px; }
.nav__menu {
    display: none;                       /* hidden on mobile until toggled */
    position: absolute;
    right: 0;
    top: calc(100% + 0.5rem);
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 0.5rem;
    min-width: 11rem;
    flex-direction: column;
    box-shadow: 0 10px 30px rgba(0, 26, 45, 0.12);
}
.nav__checkbox:checked ~ .nav__menu { display: flex; }   /* open dropdown */
.nav__menu a {
    color: var(--color-ink-soft);
    font-weight: 500;
    padding: 0.55rem 0.75rem;
    border-radius: 6px;
}
.nav__menu a:hover { background: var(--color-surface); text-decoration: none; color: var(--color-primary-d); }

/* ---------- Hero ---------- */
.hero {
    background:
        radial-gradient(120% 120% at 80% -10%, rgba(10, 126, 165, 0.18), transparent 60%),
        var(--color-surface);
    border-bottom: 1px solid var(--color-border);
}
.hero__inner { padding-block: var(--space-lg); max-width: var(--measure); }
.hero__eyebrow {
    text-transform: uppercase;
    letter-spacing: 0.12em;
    font-size: var(--step--1);
    font-weight: 600;
    color: var(--color-primary-d);
    margin: 0 0 0.5rem;
}
.hero__title { font-size: var(--step-3); margin: 0 0 0.25rem; }
.hero__lead { font-size: var(--step-2); color: var(--color-ink-soft); margin: 0 0 1rem; font-weight: 500; }
.hero__desc { font-size: var(--step-0); color: var(--color-ink-soft); margin: 0 0 1.75rem; }
.hero__actions { display: flex; flex-wrap: wrap; gap: 0.75rem; }

/* ---------- Buttons ---------- */
.btn {
    display: inline-block;
    padding: 0.7rem 1.3rem;
    border-radius: var(--radius);
    font-weight: 600;
    font-size: var(--step-0);
    border: 1px solid transparent;
    transition: background-color 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}
.btn:hover { text-decoration: none; }
.btn--primary { background: var(--color-primary); color: #fff; }
.btn--primary:hover { background: var(--color-primary-d); color: #fff; }
.btn--ghost { background: transparent; color: var(--color-primary-d); border-color: var(--color-border); }
.btn--ghost:hover { background: #fff; border-color: var(--color-primary); }

/* ---------- Sections ---------- */
.section { padding-block: var(--space-lg); }
.section--alt { background: var(--color-surface); border-block: 1px solid var(--color-border); }
.section__title { font-size: var(--step-2); margin-bottom: 1.5rem; }
.section__lead { color: var(--color-ink-soft); max-width: var(--measure); margin: 0 0 1.5rem; }
.search__summary { color: var(--color-ink-soft); margin: 0 0 1.5rem; }

/* ---------- Card grid (responsive, no breakpoints needed) ---------- */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(min(100%, 17rem), 1fr));
    gap: 1.25rem;
}
.card {
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 1.5rem;
    overflow: hidden;
}
/* Full-bleed featured cover at the top of an article card (vertical card) */
.card__cover-link { display: block; margin: -1.5rem -1.5rem 1.25rem; }
.card__cover {
    display: block;
    width: 100%;
    height: 180px;
    object-fit: cover;
    background: var(--color-surface);
}

/* Article list: stacked horizontal cards (image left, text right) */
.article-list { display: flex; flex-direction: column; gap: 1.5rem; }
.card--row {
    display: grid;
    grid-template-columns: minmax(0, 320px) 1fr;
    gap: 1.5rem;
    align-items: start;
}
.card__content { display: flex; flex-direction: column; }
.card--row .card__cover-link { margin: 0; }
.card--row .card__cover {
    height: auto;
    aspect-ratio: 1200 / 630;          /* matches the image — no cropping */
    border-radius: var(--radius);
}
@media (max-width: 40rem) {
    .card--row { grid-template-columns: 1fr; }   /* stack: image on top, full width */
}
.section--alt .card { background: #fff; }
.card__media {
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-surface);
    border-radius: var(--radius);
    padding: 1.25rem;
    margin-bottom: 1.25rem;
}
.card__img { display: block; width: auto; max-width: 100%; height: 130px; }
.card__kicker {
    text-transform: uppercase;
    letter-spacing: 0.12em;
    font-size: var(--step--1);
    font-weight: 600;
    color: var(--color-primary-d);
    margin: 0 0 0.25rem;
}
.card__title { font-size: var(--step-1); margin-bottom: 0.35rem; }
.card__title a { color: var(--color-deep); }
.card__title a:hover { color: var(--color-primary-d); text-decoration: none; }
.card__meta { color: var(--color-ink-soft); font-size: var(--step--1); margin: 0.1rem 0 0.5rem; display: flex; flex-wrap: wrap; gap: 0.4rem; }
.card__body { color: var(--color-ink-soft); margin: 0; }
.card__more { display: inline-block; margin-top: 0.75rem; font-weight: 600; }

.empty {
    border: 1px dashed var(--color-border);
    border-radius: var(--radius);
    padding: 2.5rem 1.5rem;
    text-align: center;
    color: var(--color-ink-soft);
    background: #fff;
}
.empty p { margin: 0; }

/* ---------- Article page ---------- */
.article { padding-block: var(--space-lg); }
.article__header { max-width: var(--measure); margin: 0 auto 2rem; }

/* Anchored headings clear the sticky site header when jumped to / scroll-spied. */
.prose h2[id], .prose h3[id] { scroll-margin-top: 5rem; }

/* ---- Table of contents ---- */
/* Shared list styling (mobile collapsible + desktop sidebar). */
.toc { font-size: 0.85rem; }
.toc__list { list-style: none; margin: 0; padding: 0; border-left: 1px solid var(--color-border); }
.toc__item a {
    display: block;
    padding: 0.28rem 0 0.28rem 0.9rem;
    margin-left: -1px;
    border-left: 2px solid transparent;
    color: var(--color-ink-soft);
    line-height: 1.35;
}
.toc__item a:hover { color: var(--color-primary-d); text-decoration: none; }
.toc__item--h3 a { padding-left: 1.9rem; font-size: 0.95em; }
.toc__item a.is-active {
    color: var(--color-primary-d);
    border-left-color: var(--color-primary);
    font-weight: 600;
}

/* Mobile-first: a collapsible "On this page" panel above the article (checkbox-hack). */
.toc {
    margin-bottom: 1.75rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    background: var(--color-surface);
}
.toc__toggle { position: absolute; width: 1px; height: 1px; opacity: 0; }  /* visually hidden, still focusable */
.toc__summary {
    display: flex; align-items: center; justify-content: space-between;
    cursor: pointer;
    padding: 0.7rem 1rem;
    font-weight: 700; font-size: 0.78rem; letter-spacing: 0.04em; text-transform: uppercase;
    color: var(--color-ink-soft);
}
.toc__summary::after {
    content: "";
    width: 0.5rem; height: 0.5rem;
    border-right: 2px solid currentColor; border-bottom: 2px solid currentColor;
    transform: translateY(-2px) rotate(45deg);
    transition: transform 0.15s ease;
}
.toc__toggle:checked ~ .toc__summary::after { transform: translateY(2px) rotate(-135deg); }
.toc__toggle:focus-visible ~ .toc__summary { outline: 2px solid var(--color-primary); outline-offset: -2px; }
.toc > nav { display: none; padding: 0 1rem 0.85rem; }
.toc__toggle:checked ~ nav { display: block; border-top: 1px solid var(--color-border); padding-top: 0.75rem; }

@media (min-width: 64rem) {
    .article-layout {
        display: grid;
        grid-template-columns: minmax(0, var(--measure)) 14rem;
        justify-content: center;
        gap: 3rem;
        align-items: start;
    }
    /* Explicit placement so source order (TOC first, for mobile) doesn't swap the columns. */
    .article-layout .article-main { grid-column: 1; grid-row: 1; }
    .article-layout .toc { grid-column: 2; grid-row: 1; }
    /* Content column is already the measure width, so drop the auto-centering margins. */
    .article-layout .article__header,
    .article-layout .prose,
    .article-layout .prevnext { margin-inline: 0; max-width: none; }

    /* Sidebar: sticky, always-expanded, no collapsible chrome.
       Reserve only ~top + small gap so the list isn't clipped unless it is genuinely
       taller than the viewport; padding-bottom keeps the last entry off the clip edge. */
    .toc {
        align-self: start;
        position: sticky;
        top: 4.5rem;
        max-height: calc(100vh - 5rem);
        overflow-y: auto;
        margin-bottom: 0;
        padding-bottom: 1rem;
        border: 0; border-radius: 0; background: none;
        font-size: 0.85rem;
    }
    .toc__toggle, .toc__summary::after { display: none; }
    .toc__summary {
        padding: 0 0 0.6rem 0.9rem;
        font-size: 0.7rem; letter-spacing: 0.06em;
        cursor: default;
    }
    /* Our own rule (not UA shadow behaviour) — desktop reliably forces the list visible. */
    .toc > nav { display: block; padding: 0; border-top: 0; }
}

html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
/* Article breadcrumb: (home) › [series ›] article */
.breadcrumb { margin-bottom: 1rem; }
.breadcrumb__list {
    display: flex; flex-wrap: wrap; align-items: center;
    gap: 0.5rem;
    list-style: none; margin: 0; padding: 0;
    font-size: var(--step--1);
}
.breadcrumb__item { display: inline-flex; align-items: center; gap: 0.5rem; min-width: 0; }
.breadcrumb__item:not(:first-child)::before {
    content: "›";
    color: var(--color-ink-soft);
    opacity: 0.7;
}
.breadcrumb__link { color: var(--color-ink-soft); font-weight: 600; display: inline-flex; align-items: center; }
.breadcrumb__link:hover { color: var(--color-primary-d); text-decoration: none; }
.breadcrumb__home { padding: 0.1rem; margin: -0.1rem; }
.breadcrumb__icon { width: 1.1rem; height: 1.1rem; display: block; }
.breadcrumb__current {
    color: var(--color-ink); font-weight: 600;
    min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
    max-width: min(100%, 32ch);
}
.article__back { display: inline-block; font-size: var(--step--1); font-weight: 600; margin-bottom: 1rem; }
.article__title { font-size: var(--step-3); margin: 0 0 0.6rem; }
.article__meta {
    color: var(--color-ink-soft);
    font-size: var(--step--1);
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
    margin: 0;
}
/* Error pages (404 / generic) */
.error-page { text-align: center; padding-block: var(--space-lg); }
.error-page__code {
    font-size: clamp(3.5rem, 2rem + 8vw, 7rem);
    font-weight: 800;
    line-height: 1;
    letter-spacing: -0.04em;
    color: var(--color-primary);
    margin: 0;
}
.error-page__title { font-size: var(--step-2); margin: 0.5rem 0 0.75rem; }
.error-page__lead { color: var(--color-ink-soft); max-width: 38rem; margin: 0 auto 1.75rem; }
.error-page__actions { justify-content: center; }

/* Published article figure images (caption + resize width + align + click-to-open) */
.prose figure.article-figure { display: block; margin: 1.75rem auto; max-width: 100%; }
.prose figure.article-figure.align-center { margin-left: auto; margin-right: auto; }
.prose figure.article-figure.align-left { margin-left: 0; margin-right: auto; }
.prose figure.article-figure.align-right { margin-left: auto; margin-right: 0; }
.prose figure.article-figure a { display: block; }
.prose figure.article-figure img { display: block; width: 100%; height: auto; border-radius: var(--radius); }
.prose figure.article-figure figcaption {
    margin-top: 0.5rem;
    text-align: center;
    font-size: var(--step--1);
    color: var(--color-ink-soft);
}

/* Draft preview banner */
.preview-banner {
    max-width: var(--measure);
    margin: 0 auto 1.5rem;
    padding: 0.6rem 1rem;
    background: #fff6e0;
    border: 1px solid #e6d28a;
    border-radius: var(--radius);
    color: #7a5c00;
    font-size: var(--step--1);
    font-weight: 600;
}

/* Series badge on the article page */
.series-badge {
    font-size: var(--step--1);
    color: var(--color-ink-soft);
    margin: 0 0 0.75rem;
}
.series-badge a { font-weight: 600; }

/* Prev / next article navigation */
.prevnext {
    max-width: var(--measure);
    margin: 2.5rem auto 0;
    padding-top: 1.5rem;
    border-top: 1px solid var(--color-border);
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}
.prevnext__link {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
    padding: 1rem 1.25rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
}
.prevnext__link:hover { border-color: var(--color-primary); text-decoration: none; background: var(--color-surface); }
.prevnext__next { text-align: right; }
.prevnext__dir { font-size: var(--step--1); font-weight: 600; color: var(--color-primary-d); }
.prevnext__title { color: var(--color-deep); font-weight: 600; }
.prevnext__spacer { display: block; }

/* Pager (article index) */
.pager {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1.25rem;
    margin: 2rem 0;     /* spacing above and below — works for top and bottom pagers */
}
.pager__status { color: var(--color-ink-soft); font-size: var(--step--1); }

/* "Browse all" link under the home article list */
.more-link { margin-top: 1.5rem; font-weight: 600; }

/* Series table-of-contents */
.series-parts { list-style: none; margin: 0; padding: 0; counter-reset: none; display: flex; flex-direction: column; gap: 1rem; }
.series-part__link {
    display: flex;
    gap: 1.25rem;
    align-items: flex-start;
    padding: 1.25rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    background: var(--color-bg);
}
.series-part__link:hover { border-color: var(--color-primary); text-decoration: none; background: var(--color-surface); }
.series-part__num {
    flex: 0 0 auto;
    width: 2.25rem;
    height: 2.25rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: var(--color-deep);
    color: #fff;
    font-weight: 700;
}
.series-part__body { display: flex; flex-direction: column; gap: 0.2rem; }
.series-part__title { font-size: var(--step-1); font-weight: 700; color: var(--color-deep); }
.series-part__meta { font-size: var(--step--1); color: var(--color-ink-soft); display: flex; flex-wrap: wrap; gap: 0.4rem; }
.series-part__desc { color: var(--color-ink-soft); }

@media (max-width: 40rem) {
    .prevnext { grid-template-columns: 1fr; }
    .prevnext__next { text-align: left; }
}

/* Prose: typographic styles for rendered article HTML */
.prose { max-width: var(--measure); margin-inline: auto; }
.prose > :first-child { margin-top: 0; }
.prose p { margin: 0 0 1.25rem; }
.prose h2 { font-size: var(--step-2); margin: 2.25rem 0 0.75rem; }
.prose h3 { font-size: var(--step-1); margin: 1.75rem 0 0.6rem; }
.prose ul, .prose ol { margin: 0 0 1.25rem; padding-left: 1.5rem; }
.prose li { margin-bottom: 0.4rem; }
.prose li::marker { color: var(--color-primary); }
.prose a { text-decoration: underline; text-underline-offset: 2px; }
.prose strong { color: var(--color-ink); }
.prose img { border-radius: var(--radius); margin: 1.5rem 0; }
.prose code {
    font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
    font-size: 0.88em;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    padding: 0.1em 0.4em;
    border-radius: 5px;
}
.prose pre {
    background: var(--color-ink);
    color: #e6edf3;
    padding: 1rem 1.2rem;
    border-radius: var(--radius);
    overflow-x: auto;
    margin: 0 0 1.5rem;
    font-size: 0.9rem;
    line-height: 1.6;
}
.prose pre code { background: none; border: none; padding: 0; color: inherit; font-size: inherit; }

/* ---- Highlighted code blocks (server-rendered: bar + copy + line numbers) ---- */
.prose .codeblock {
    margin: 0 0 1.5rem;
    border-radius: var(--radius);
    overflow: hidden;
    background: var(--color-ink);
    border: 1px solid var(--color-deep);
}
.codeblock__bar {
    display: flex; align-items: center; justify-content: space-between; gap: 1rem;
    padding: 0.4rem 0.5rem 0.4rem 0.85rem;
    background: rgba(255, 255, 255, 0.04);
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}
.codeblock__lang {
    font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
    font-size: 0.7rem; letter-spacing: 0.05em; text-transform: uppercase;
    color: #8aa0b3;
}
.codeblock__copy {
    font: inherit; font-size: 0.74rem; line-height: 1;
    color: #cfe0ec; background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.14); border-radius: 6px;
    padding: 0.32rem 0.6rem; cursor: pointer; transition: background 0.12s ease;
}
.codeblock__copy:hover { background: rgba(255, 255, 255, 0.18); }
.codeblock__copy.is-copied { color: #7ee2a8; border-color: rgba(126, 226, 168, 0.45); }
.prose .codeblock__pre {
    margin: 0; padding: 0.75rem 0; border: 0; border-radius: 0;
    background: transparent;
}
.codeblock__pre code { display: block; min-width: fit-content; counter-reset: ln; }
.codeblock .cl {
    display: block; position: relative;
    white-space: pre;
    padding: 0 1.1rem 0 3.7rem;
}
.codeblock .cl::before {
    counter-increment: ln;
    content: counter(ln);
    position: absolute; left: 0;
    width: 2.4rem; padding-right: 0.7rem;
    text-align: right;
    color: rgba(255, 255, 255, 0.28);
    border-right: 1px solid rgba(255, 255, 255, 0.08);
    user-select: none; -webkit-user-select: none;
}
/* GitHub-dark-style token palette on the navy background */
.codeblock .hljs-keyword  { color: #ff7b72; }
.codeblock .hljs-built_in { color: #ffa657; }
.codeblock .hljs-literal  { color: #79c0ff; }
.codeblock .hljs-number   { color: #79c0ff; }
.codeblock .hljs-string   { color: #a5d6ff; }
.codeblock .hljs-comment  { color: #8b949e; font-style: italic; }
.codeblock .hljs-name     { color: #7ee787; }
.codeblock .hljs-attr     { color: #79c0ff; }
.codeblock .hljs-title    { color: #d2a8ff; }
.codeblock .hljs-meta     { color: #d2a8ff; }
.codeblock .hljs-variable { color: #ffa657; }

/* Editor code-language picker */
.editor-toolbar__lang {
    font: inherit; font-size: 0.8rem;
    padding: 0.3rem 0.4rem;
    border: 1px solid var(--color-border); border-radius: 6px;
    background: #fff; color: var(--color-ink); cursor: pointer;
}
.editor-toolbar__lang:disabled { opacity: 0.45; cursor: not-allowed; }
.prose blockquote {
    margin: 0 0 1.5rem;
    padding: 0.75rem 1.25rem;
    border-left: 4px solid var(--color-primary);
    background: var(--color-surface);
    border-radius: 0 var(--radius) var(--radius) 0;
    color: var(--color-ink-soft);
}
.prose blockquote :last-child { margin-bottom: 0; }

/* Article tables */
.prose table {
    width: 100%;
    border-collapse: collapse;
    margin: 0 0 1.5rem;
    font-size: 0.95rem;
}
.prose th, .prose td {
    border: 1px solid var(--color-border);
    padding: 0.55rem 0.8rem;
    text-align: left;
    vertical-align: top;
}
.prose th {
    background: var(--color-surface);
    font-weight: 600;
    color: var(--color-deep);
}
.prose tbody tr:nth-child(even) td { background: #fafcfd; }
.prose table p { margin: 0; }
/* Mobile: let wide tables scroll horizontally instead of overflowing the viewport. */
@media (max-width: 640px) {
    .prose table { display: block; overflow-x: auto; white-space: nowrap; }
}

/* ---------- Footer ---------- */
.site-footer { background: var(--color-deep); color: var(--color-on-deep); }
.site-footer__inner { padding-block: 2.5rem; text-align: center; }
.site-footer__brand { font-weight: 700; font-size: var(--step-1); color: #fff; margin: 0 0 0.25rem; }
.site-footer__muted { color: rgba(234, 243, 247, 0.7); font-size: var(--step--1); margin: 0.15rem 0; }
.site-footer__links { display: flex; flex-wrap: wrap; justify-content: center; gap: 0.4rem 1.1rem; margin-top: 1rem; font-size: var(--step--1); }
.site-footer__links a { color: rgba(234, 243, 247, 0.85); }
.site-footer__links a:hover { color: #fff; }

/* ---------- Larger screens ---------- */
@media (min-width: 48rem) {
    .container { padding-inline: 2rem; }
    .nav__toggle { display: none; }            /* hide toggle on desktop */
    .nav__menu {                                /* always show menu inline on desktop */
        display: flex !important;
        position: static;
        flex-direction: row;
        background: transparent;
        border: none;
        box-shadow: none;
        padding: 0;
        gap: 0.25rem;
        min-width: 0;
    }
}

/* ============================================================
   Admin area (/al-admin) — not public, not indexed.
   ============================================================ */
.btn--sm { padding: 0.4rem 0.85rem; font-size: var(--step--1); }

.admin-header {
    background: var(--color-deep);
    color: #fff;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}
.admin-header__inner {
    max-width: 72rem;
    margin-inline: auto;
    padding: 0.75rem 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    flex-wrap: wrap;
}
.admin-brand { display: inline-flex; align-items: center; gap: 0.6rem; color: #fff; font-weight: 700; }
.admin-brand:hover { text-decoration: none; }
.admin-nav { display: flex; align-items: center; gap: 1.25rem; flex-wrap: wrap; }
.admin-nav a { color: var(--color-on-deep); font-weight: 500; }
.admin-nav a:hover { color: #fff; }
.admin-logout { margin: 0; }
.admin-header .btn--ghost { color: #fff; border-color: rgba(255, 255, 255, 0.4); }
.admin-header .btn--ghost:hover { background: rgba(255, 255, 255, 0.1); border-color: #fff; }

.admin { padding-block: 2rem 4rem; }
.admin__container { max-width: 72rem; margin-inline: auto; padding-inline: 1.5rem; }
.admin__head { display: flex; align-items: center; justify-content: space-between; gap: 1rem; margin-bottom: 1.5rem; flex-wrap: wrap; }
.admin__title { margin: 0; }
.admin__subtitle { margin: 2.5rem 0 1rem; font-size: var(--step-2); }
.admin__note { color: var(--color-ink-soft); font-size: var(--step--1); margin-top: 0.75rem; }
.admin-flash { background: #e3f3e8; color: #1d6b38; border: 1px solid #b6dcc2; border-radius: var(--radius); padding: 0.6rem 0.9rem; margin: 0 0 1.25rem; font-size: var(--step--1); font-weight: 600; }
.admin-hint { color: var(--color-ink-soft); font-size: var(--step--1); margin: 0 0 1.5rem; max-width: 48rem; }

/* Sign-in page (social SSO) */
.signin { max-width: 30rem; margin-inline: auto; text-align: center; }
.signin__error { background: #fdeaea; color: #a4222b; border: 1px solid #f3c2c5; border-radius: var(--radius); padding: 0.6rem 0.9rem; font-size: var(--step--1); }
.signin__providers { display: flex; flex-direction: column; gap: 0.75rem; margin-top: 1.5rem; }
.signin__btn {
    display: block; padding: 0.8rem 1rem; border-radius: var(--radius);
    font-weight: 600; border: 1px solid var(--color-border); background: #fff; color: var(--color-ink);
}
.signin__btn:hover { text-decoration: none; border-color: var(--color-primary); color: var(--color-primary-d); }
.signin__btn--github { background: var(--color-ink); color: #fff; border-color: var(--color-ink); }
.signin__btn--github:hover { background: #00121f; color: #fff; border-color: #00121f; }
.profile-row { display: flex; align-items: center; gap: 1.25rem; margin-bottom: 1rem; flex-wrap: wrap; }
.profile-row__fields { flex: 1; min-width: 14rem; }
.profile-avatar { width: 96px; height: 96px; border-radius: 50%; object-fit: cover; border: 1px solid var(--color-border); flex: 0 0 auto; background: var(--color-surface); }
.profile-avatar.is-empty { color: transparent; } /* no src yet: just a plain circle, hide alt text */

/* Tables */
.admin-table { width: 100%; border-collapse: collapse; background: #fff; border: 1px solid var(--color-border); border-radius: var(--radius); overflow: hidden; }
.admin-table th, .admin-table td { text-align: left; padding: 0.75rem 1rem; border-bottom: 1px solid var(--color-border); vertical-align: middle; }
.admin-table thead th { background: var(--color-surface); font-size: var(--step--1); text-transform: uppercase; letter-spacing: 0.05em; color: var(--color-ink-soft); }
.admin-table tr:last-child td { border-bottom: none; }
.admin-table__title { font-weight: 600; color: var(--color-deep); }
.admin-table__actions { white-space: nowrap; }
.admin-table__actions a, .admin-table__actions form { display: inline-block; margin-right: 0.75rem; }
.admin-table__actions form { margin: 0; }
.link-danger { background: none; border: none; padding: 0; color: #b3261e; cursor: pointer; font: inherit; }
.link-danger:hover { text-decoration: underline; }

.badge { display: inline-block; padding: 0.15rem 0.6rem; border-radius: 999px; font-size: var(--step--1); font-weight: 600; }
.badge--ok { background: #e3f3e8; color: #1d6b38; }
.badge--draft { background: var(--color-surface); color: var(--color-ink-soft); }

/* Forms */
.field { display: flex; flex-direction: column; gap: 0.35rem; margin-bottom: 1rem; }
.field__label { font-weight: 600; font-size: var(--step--1); color: var(--color-deep); }
.field__label small { font-weight: 400; color: var(--color-ink-soft); }
.field__count { align-self: flex-end; font-size: var(--step--1); color: var(--color-ink-soft); }
.field__count--over { color: #d9534f; font-weight: 600; }
.field__hint { font-size: var(--step--1); color: var(--color-ink-soft); }
.admin__head--sub { margin-top: 2.5rem; }
.admin__head--sub .admin__subtitle { margin: 0; }
.field__input {
    font: inherit;
    width: 100%;
    padding: 0.55rem 0.7rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    background: #fff;
    color: var(--color-ink);
}
.field__input:focus { outline: none; border-color: var(--color-primary); box-shadow: 0 0 0 3px rgba(10, 126, 165, 0.18); }

.admin-form__grid { display: grid; grid-template-columns: 1fr; gap: 2rem; }
.admin-form__seo { border: 1px solid var(--color-border); border-radius: var(--radius); padding: 1.25rem 1.5rem; margin: 1.5rem 0; }
.admin-form__seo legend { font-weight: 700; color: var(--color-deep); padding-inline: 0.4rem; }
.admin-form__row { display: grid; grid-template-columns: 1fr; gap: 1rem; }
.admin-form__actions { display: flex; gap: 0.75rem; }

@media (min-width: 60rem) {
    .admin-form__grid { grid-template-columns: 1fr 20rem; }
    .admin-form__row { grid-template-columns: 1fr 1fr; }
}

/* TipTap editor */
.editor-toolbar { display: flex; flex-wrap: wrap; gap: 0.35rem; padding: 0.5rem; border: 1px solid var(--color-border); border-bottom: none; border-radius: var(--radius) var(--radius) 0 0; background: var(--color-surface); }
.editor-toolbar button { font: inherit; font-size: var(--step--1); padding: 0.3rem 0.6rem; border: 1px solid var(--color-border); border-radius: 6px; background: #fff; cursor: pointer; }
.editor-toolbar button:hover { border-color: var(--color-primary); color: var(--color-primary-d); }
.editor-toolbar button.is-active { background: var(--color-primary); border-color: var(--color-primary); color: #fff; }
.editor-toolbar button:disabled { opacity: 0.4; cursor: not-allowed; }
.editor-toolbar button:disabled:hover { border-color: var(--color-border); color: inherit; }
.editor { border: 1px solid var(--color-border); border-radius: 0 0 var(--radius) var(--radius); background: #fff; }
.editor .ProseMirror { min-height: 22rem; padding: 1rem 1.2rem; outline: none; }
.editor .ProseMirror:focus { outline: none; }
.editor .ProseMirror > :first-child { margin-top: 0; }
.editor .ProseMirror p { margin: 0 0 1rem; }
.editor .ProseMirror h2 { font-size: var(--step-2); margin: 1.5rem 0 0.5rem; }
.editor .ProseMirror h3 { font-size: var(--step-1); margin: 1.25rem 0 0.5rem; }
.editor .ProseMirror ul, .editor .ProseMirror ol { padding-left: 1.4rem; margin: 0 0 1rem; }
.editor .ProseMirror blockquote { border-left: 4px solid var(--color-primary); padding-left: 1rem; color: var(--color-ink-soft); margin: 0 0 1rem; }
.editor .ProseMirror pre { background: var(--color-ink); color: #e6edf3; padding: 1rem; border-radius: var(--radius); overflow-x: auto; }
.editor .ProseMirror code {
    font-family: ui-monospace, Menlo, Consolas, monospace;
    font-size: 0.88em;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    padding: 0.1em 0.4em;
    border-radius: 5px;
}
.editor .ProseMirror pre code { background: none; border: none; padding: 0; font-size: inherit; }
.editor .ProseMirror img { max-width: 100%; height: auto; border-radius: var(--radius); }

/* In-editor tables */
.editor .ProseMirror table {
    border-collapse: collapse; table-layout: fixed; width: 100%; margin: 0.5rem 0 1rem;
    overflow: hidden;
}
.editor .ProseMirror th, .editor .ProseMirror td {
    border: 1px solid var(--color-border); padding: 0.4rem 0.6rem;
    min-width: 4em; vertical-align: top; position: relative;
}
.editor .ProseMirror th { background: var(--color-surface); font-weight: 600; text-align: left; }
.editor .ProseMirror table p { margin: 0; }
.editor .ProseMirror .selectedCell::after {
    content: ""; position: absolute; inset: 0;
    background: rgba(10, 126, 165, 0.12); pointer-events: none;
}

/* In-editor figure image (resizable, caption) */
.editor-figure { position: relative; margin: 1.25rem auto; max-width: 100%; }
.editor-figure img { display: block; width: 100%; height: auto; border-radius: var(--radius); }
.editor-figure figcaption { text-align: center; font-size: var(--step--1); color: var(--color-ink-soft); margin-top: 0.4rem; }
.editor-figure.ProseMirror-selectednode { outline: 2px solid var(--color-primary); outline-offset: 3px; }
.editor-figure.is-noalt img { outline: 2px dashed #d9534f; outline-offset: 2px; }
.editor-figure__handle {
    position: absolute; right: -7px; bottom: -7px;
    width: 16px; height: 16px;
    background: var(--color-primary); border: 2px solid #fff; border-radius: 50%;
    cursor: ew-resize; box-shadow: 0 0 0 1px rgba(0, 26, 45, 0.15);
}
.editor-figure__toolbar {
    position: absolute; left: 8px; top: 8px;
    display: flex; gap: 4px;
    opacity: 0; transition: opacity 0.12s ease;
}
.editor-figure:hover .editor-figure__toolbar,
.editor-figure.ProseMirror-selectednode .editor-figure__toolbar { opacity: 1; }
.editor-figure__toolbar button {
    font: inherit; font-size: 0.72rem; font-weight: 600; line-height: 1;
    padding: 0.3rem 0.5rem;
    background: rgba(0, 26, 45, 0.82); color: #fff;
    border: none; border-radius: 6px; cursor: pointer;
}
.editor-figure__toolbar button.is-active { background: var(--color-primary); }

/* Alignment (editor) — image keeps its own row, positioned within the column */
.editor-figure.align-center { margin-left: auto; margin-right: auto; }
.editor-figure.align-left { margin-left: 0; margin-right: auto; }
.editor-figure.align-right { margin-left: auto; margin-right: 0; }
.editor-labelrow { display: flex; align-items: center; justify-content: space-between; gap: 1rem; }
.autosave-status { font-size: var(--step--1); color: var(--color-ink-soft); }

/* Featured-image picker */
.media-picker { display: flex; gap: 1rem; align-items: flex-start; flex-wrap: wrap; }
.media-picker__preview { width: 240px; max-width: 100%; height: auto; border: 1px solid var(--color-border); border-radius: var(--radius); background: var(--color-surface); }
.media-picker__preview.is-empty { display: none; }
.media-picker__controls { display: flex; flex-direction: column; gap: 0.5rem; flex: 1; min-width: 12rem; }

/* Revisions */
.revisions { margin-top: 2.5rem; }
.revisions__list { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 0.4rem; max-width: 32rem; }
.revisions__list li { display: flex; align-items: center; justify-content: space-between; gap: 1rem; padding: 0.5rem 0.85rem; border: 1px solid var(--color-border); border-radius: 6px; font-size: var(--step--1); }
.revisions__list form { margin: 0; }
.link { background: none; border: none; padding: 0; color: var(--color-primary-d); cursor: pointer; font: inherit; font-weight: 600; }
.link:hover { text-decoration: underline; }

/* Login */
.admin-login { display: flex; align-items: center; justify-content: center; padding: 3rem 1.5rem; }
.admin-login__card { width: 100%; max-width: 22rem; background: #fff; border: 1px solid var(--color-border); border-radius: var(--radius); padding: 2rem; box-shadow: 0 10px 40px rgba(0, 26, 45, 0.08); }
.admin-login__brand { display: block; text-align: center; margin-bottom: 0.75rem; }
.admin-login__brand img { margin: 0 auto; }
.admin-login__title { font-size: var(--step-1); text-align: center; margin: 0 0 1.5rem; }
.admin-login__submit { width: 100%; }
.admin-login__error { background: #fde8e6; color: #b3261e; padding: 0.6rem 0.8rem; border-radius: var(--radius); font-size: var(--step--1); margin: 0 0 1rem; }
.admin-login__ok { background: #e3f3e8; color: #1d6b38; padding: 0.6rem 0.8rem; border-radius: var(--radius); font-size: var(--step--1); margin: 0 0 1rem; }

/* ---------- Accessibility ---------- */
:focus-visible { outline: 3px solid var(--color-primary); outline-offset: 2px; }
@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    * { transition: none !important; }
}
.visually-hidden {
    position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
    overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}

/* ---------- Comments ---------- */
.article-comments { border-top: 1px solid var(--color-border); }
.article-comments__title { font-size: var(--step-1); margin-bottom: 1rem; }
.article-comments__count { color: var(--color-ink-soft); font-weight: 400; }
.article-comments__cta { margin: 0; }

.comments { max-width: var(--measure); }
.comments__title { font-size: var(--step-1); margin-bottom: 1.25rem; }
.comments__count { color: var(--color-ink-soft); font-weight: 400; }
.comments__notice {
    background: #e3f3e8; color: #1d6b38; border-radius: var(--radius);
    padding: 0.7rem 1rem; margin: 0 0 1.25rem;
}
.comments__empty { color: var(--color-ink-soft); }
.comments__signin { display: flex; flex-wrap: wrap; align-items: center; gap: 0.6rem; }
.comments__signin-note { color: var(--color-ink-soft); font-size: var(--step--1); }
.comments-back { margin-bottom: 0.5rem; }
.comments-page__title { font-size: var(--step-2); }

.comment-form-wrap { margin-bottom: 2rem; }
.comment-form textarea {
    width: 100%; padding: 0.7rem 0.9rem; border: 1px solid var(--color-border);
    border-radius: var(--radius); font: inherit; resize: vertical; background: #fff;
}
.comment-form textarea:focus { outline: 2px solid var(--color-primary); border-color: var(--color-primary); }
.comment-form__actions {
    display: flex; align-items: center; gap: 0.8rem; margin-top: 0.6rem; flex-wrap: wrap;
}
.comment-form__as { color: var(--color-ink-soft); font-size: var(--step--1); margin-right: auto; }
.comment-form--reply, .comment-form--edit { margin: 0.8rem 0 0.4rem; }

.comment-list { list-style: none; padding: 0; margin: 0; display: grid; gap: 1.5rem; }
.comment-list--replies {
    margin-top: 1.25rem; padding-left: 1.1rem; gap: 1.25rem;
    border-left: 2px solid var(--color-border);
}
.comment { scroll-margin-top: 5rem; }
.comment__head { display: flex; align-items: center; gap: 0.55rem; flex-wrap: wrap; }
.comment__avatar {
    width: 36px; height: 36px; border-radius: 50%; overflow: hidden; flex: 0 0 auto;
    display: inline-flex; align-items: center; justify-content: center;
    background: var(--color-deep); color: var(--color-on-deep);
}
.comment__avatar img { width: 100%; height: 100%; object-fit: cover; }
.comment__initials { font-size: var(--step--1); font-weight: 700; }
.comment__author { font-weight: 700; }
.comment__badge {
    background: var(--color-primary); color: #fff; font-size: 0.7rem; font-weight: 700;
    text-transform: uppercase; letter-spacing: 0.04em; padding: 0.1rem 0.45rem; border-radius: 999px;
}
.comment__time, .comment__edited { color: var(--color-ink-soft); font-size: var(--step--1); }
.comment__body { margin: 0.5rem 0 0.4rem; white-space: pre-wrap; overflow-wrap: anywhere; }
.comment__actions { display: flex; align-items: center; gap: 1rem; }
.comment__action {
    background: none; border: 0; padding: 0; cursor: pointer; font: inherit;
    color: var(--color-ink-soft); font-size: var(--step--1);
}
.comment__action:hover { color: var(--color-primary); text-decoration: underline; }
.comment__action--danger:hover { color: #b3261e; }
.comment__action-form { display: inline; margin: 0; }

.comment-like { margin: 0; }
.comment-like__btn {
    background: none; border: 0; padding: 0; cursor: pointer; font: inherit;
    color: var(--color-ink-soft); font-size: var(--step--1);
    display: inline-flex; align-items: center; gap: 0.3rem;
}
.comment-like__icon { font-size: 1rem; line-height: 1; }
.comment-like__btn:hover { color: var(--color-primary); }
.comment-like__btn.is-liked { color: #d6336c; font-weight: 600; }

/* ---------- Admin: comments moderation ---------- */
.admin-badge {
    display: inline-block; min-width: 1.2em; padding: 0 0.4em; margin-left: 0.3em;
    background: #d6336c; color: #fff; border-radius: 999px; font-size: 0.72rem; font-weight: 700;
    line-height: 1.5; text-align: center;
}
.admin-tabs { display: flex; gap: 1.2rem; }
.admin-tabs a { color: var(--color-ink-soft); }
.admin-tabs a.is-active { color: var(--color-ink); font-weight: 700; border-bottom: 2px solid var(--color-primary); }
.admin-empty { color: var(--color-ink-soft); padding: 1.5rem 0; }
.admin-muted { color: var(--color-ink-soft); font-size: var(--step--1); }
.admin-comment-body { max-width: 32rem; white-space: pre-wrap; overflow-wrap: anywhere; }
.admin-inline-form { display: inline; margin: 0; }
.admin-table--comments td { vertical-align: top; }
.badge--pending { background: #fff4e0; color: #9a6700; }
.btn--danger { background: #b3261e; color: #fff; }
.btn--danger:hover { background: #8c1d17; color: #fff; }