/**
 * Component Styles
 * Premium Editorial Design System
 *
 * @package Editorial
 */

/* ========================================
   STATS BOX (shared) — mono label/value rows in a white box.
   Home (numbers / currently), Blog (total/span/tags), Papers (papers/venues/since).
   ======================================== */

.stats-box {
    background-color: var(--surface);
    border: 1px solid var(--border-strong);
    border-radius: var(--radius-sm);
    min-width: 190px;
}

.stats-box__row {
    display: flex;
    justify-content: space-between;
    gap: var(--space-10);
    padding: 9px 14px;
    font-family: var(--font-mono);
    font-size: 0.72rem; /* ~11.5px */
    line-height: 1.4;
}

.stats-box__row + .stats-box__row {
    border-top: 1px solid var(--border-light);
}

.stats-box__label {
    color: var(--text-light);
    text-transform: lowercase;
    letter-spacing: 0.04em;
}

.stats-box__value {
    color: var(--text);
    font-weight: 500;
    text-align: right;
    white-space: nowrap;
}

/* ========================================
   HOMEPAGE — CREDIBILITY ANCHOR
   Credentials strip, featured work, index sections, about teaser.
   ======================================== */

.home-template .container {
    max-width: var(--width-index);
}

/* Credentials eyebrow — mono, accent, uppercase. */
.credentials-strip {
    font-family: var(--font-mono);
    font-size: 11px;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--accent);
    margin: 0 0 var(--space-8);
    line-height: 1.6;
}

.credentials-strip__sep {
    color: var(--accent);
    font-weight: 600;
}

/* ---- Home hero: 2-col (intro | Currently card) ---- */
.home-hero {
    display: grid;
    grid-template-columns: 1fr minmax(0, 340px);
    gap: var(--space-16);
    align-items: start;
    padding: var(--space-8) 0 var(--space-16);
    margin-bottom: var(--space-8);
    border-bottom: 1px solid var(--border);
}

.home-hero__intro {
    min-width: 0;
}

.home-hero__statement {
    font-family: var(--font-serif);
    font-size: var(--text-hero);
    font-weight: 500;
    line-height: 1.08;
    letter-spacing: -0.01em;
    color: var(--text);
    margin: 0 0 var(--space-6);
    max-width: 16ch;
}

.home-hero__currently {
    font-family: var(--font-sans);
    font-size: var(--text-base);
    color: var(--text-muted);
    line-height: 1.6;
    margin: 0 0 var(--space-6);
    max-width: 52ch;
}

.home-hero__actions {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-3);
    margin-bottom: var(--space-8);
}

.home-hero__aside {
    position: sticky;
    top: calc(var(--header-height) + var(--space-6));
}

.currently-card__head {
    font-family: var(--font-mono);
    font-size: 11px;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--accent);
    padding: 10px 14px;
    border-bottom: 1px solid var(--border-light);
}

/* Currently card holds prose-length values (unlike the numeric stats box),
   so its rows wrap and align to the top instead of forcing one line. */
.currently-card .stats-box__row {
    gap: var(--space-4);
    align-items: baseline;
}

.currently-card .stats-box__label {
    flex-shrink: 0;
}

.currently-card .stats-box__value {
    white-space: normal;
    overflow-wrap: anywhere;
    max-width: 62%;
}

@media (max-width: 860px) {
    .home-hero {
        grid-template-columns: 1fr;
        gap: var(--space-8);
    }

    .home-hero__aside {
        position: static;
        max-width: 300px;
    }

    .home-hero__statement {
        font-size: var(--text-4xl);
        max-width: none;
    }
}

/* Currently line — italic editorial sentence under credentials.
   Leading word ("Currently") carries the accent for quiet emphasis. */
.currently-line {
    font-family: var(--font-serif);
    font-style: italic;
    font-size: var(--text-base);
    color: var(--text-muted);
    line-height: var(--leading-relaxed);
    margin: 0 0 var(--space-4);
}

.currently-line__lead {
    color: var(--accent);
    font-style: normal;
    font-family: var(--font-sans);
    font-weight: 600;
    font-size: var(--text-xs);
    text-transform: uppercase;
    letter-spacing: var(--tracking-widest);
    margin-right: var(--space-2);
    vertical-align: 0.05em;
}

/* By-the-numbers row — quiet stats inline. Numerals in accent, units muted. */
.numbers-row {
    font-size: var(--text-sm);
    color: var(--text-light);
    margin: 0 0 var(--space-10);
    font-variant-numeric: tabular-nums;
    line-height: var(--leading-relaxed);
}

.numbers-row__num {
    color: var(--accent);
    font-weight: 600;
    margin-right: 0.2em;
}

.numbers-row__sep {
    color: var(--accent);
    margin: 0 var(--space-2);
}

/* Selected essays — curated list, larger than index cards.
   Each entry has a title and an annotation. */
.selected-essays {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: var(--space-1);
}

.selected-essays__item {
    padding: var(--space-5) 0 var(--space-5) var(--space-3);
    margin-left: calc(-1 * var(--space-3));
    border-bottom: 1px solid var(--border-light);
    border-left: 2px solid transparent;
    transition: background-color var(--transition-fast), border-color var(--transition-fast);
}

.selected-essays__item:first-child {
    border-top: 1px solid var(--border-light);
}

.selected-essays__item:hover {
    background-color: var(--surface);
    border-left-color: var(--accent);
}

.selected-essays__title {
    font-family: var(--font-sans);
    font-size: var(--text-lg);
    font-weight: 600;
    line-height: var(--leading-snug);
    letter-spacing: var(--tracking-tight);
    margin: 0 0 var(--space-2);
}

.selected-essays__title a {
    color: var(--text);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.selected-essays__title a:hover {
    color: var(--link);
}

.selected-essays__note {
    font-family: var(--font-serif);
    font-style: italic;
    font-size: var(--text-sm);
    color: var(--text-muted);
    line-height: var(--leading-relaxed);
    margin: 0;
}

/* Talks & press — quiet list, smaller than essays. */
.talks-press {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: var(--space-1);
}

.talks-press__item {
    padding: var(--space-4) 0;
    border-bottom: 1px solid var(--border-light);
}

.talks-press__item:first-child {
    border-top: 1px solid var(--border-light);
}

.talks-press__title {
    font-family: var(--font-sans);
    font-size: var(--text-base);
    font-weight: 600;
    line-height: var(--leading-snug);
    margin: 0 0 var(--space-1);
}

.talks-press__title a {
    color: var(--text);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.talks-press__title a:hover {
    color: var(--link);
}

.talks-press__context {
    font-size: var(--text-sm);
    color: var(--text-muted);
    margin: 0;
    line-height: var(--leading-relaxed);
}

/* Featured work — quiet but unmissable. Accent left rail = paper-margin marker. */
.featured-work {
    margin: 0 0 var(--space-16);
    padding: var(--space-8) var(--space-8) var(--space-10) calc(var(--space-8) - 3px);
    background-color: var(--surface);
    border: 1px solid var(--border);
    border-left: 3px solid var(--accent);
    border-bottom-width: 2px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-card);
}

.featured-work__eyebrow {
    display: inline-block;
    font-size: var(--text-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: var(--tracking-widest);
    color: var(--accent);
    margin-bottom: var(--space-3);
}

.featured-work__title {
    font-family: var(--font-serif);
    font-size: var(--text-3xl);
    font-weight: 500;
    line-height: var(--leading-tight);
    letter-spacing: var(--tracking-tight);
    margin: 0 0 var(--space-4);
}

.featured-work__title a {
    color: var(--text);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.featured-work__title a:hover {
    color: var(--link);
}

.featured-work__dek {
    font-size: var(--text-lg);
    color: var(--text-muted);
    line-height: var(--leading-relaxed);
    margin: 0 0 var(--space-6);
}

.featured-work__meta {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-4);
}

.featured-work__doi {
    font-family: var(--font-mono);
    font-size: var(--text-xs);
    color: var(--accent);
    background-color: var(--accent-soft);
    border: 1px solid var(--accent-muted);
    padding: var(--space-1) var(--space-3);
    border-radius: var(--radius-sm);
    letter-spacing: 0;
}

.featured-work__cta {
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--accent);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.featured-work__cta:hover {
    color: var(--accent-hover);
}

/* Home section spacing */
.home-section,
.about-teaser {
    margin-bottom: var(--space-12);
}

/* Section head row: mono eyebrow + "All →" link, split. */
.home-section__head {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: var(--space-6);
}

.home-section__head .section-header {
    margin-bottom: var(--space-8);
}

.home-section__all {
    flex-shrink: 0;
    font-family: var(--font-mono);
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-light);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.home-section__all:hover {
    color: var(--accent);
}

.home-section__more {
    margin: var(--space-6) 0 0;
}

.home-section__more a {
    font-family: var(--font-mono);
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-light);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.home-section__more a:hover {
    color: var(--accent);
}

/* About teaser — bio block below the fold */
.about-teaser__content {
    font-size: var(--text-base);
    color: var(--text);
    line-height: var(--leading-loose);
}

.about-teaser__content p:last-child {
    margin-bottom: 0;
}

/* ========================================
   POST CARD INDEX — "THE JOURNAL" LIST ROW
   Full:    [num] [thumb] [title+dek] [chip] [date]   (Blog index)
   Compact: [title] [chip] [date]                     (Home lists)
   ======================================== */

.posts-index-list {
    display: flex;
    flex-direction: column;
}

.post-card-index {
    display: grid;
    grid-template-columns: 52px 92px 1fr auto auto;
    gap: var(--space-6);
    align-items: center;
    padding: var(--space-6) 0;
    border-top: 1px solid var(--border-light);
    transition: background-color var(--transition-fast);
}

.posts-index-list .post-card-index:last-child {
    border-bottom: 1px solid var(--border-light);
}

.post-card-index--compact {
    grid-template-columns: 1fr auto auto;
    align-items: baseline;
    padding: var(--space-5) 0;
}

.post-card-index__num {
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--text-light);
}

.post-card-index__thumb {
    display: block;
    width: 92px;
    aspect-ratio: 3 / 2; /* matches the 3:2 illustrations so they fill with no mat gap */
    background-color: var(--surface-2);
    border: 1px solid var(--border);
    overflow: hidden;
}

.post-card-index__thumb img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    border-radius: 0;
}

.post-card-index__body {
    min-width: 0;
}

.post-card-index__title {
    font-family: var(--font-serif);
    font-size: var(--text-2xl);
    font-weight: 500;
    line-height: 1.18;
    letter-spacing: -0.01em;
    margin: 0;
}

.post-card-index__title a {
    color: var(--text);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.post-card-index__title a:hover {
    color: var(--link);
}

.post-card-index__dek {
    font-family: var(--font-sans);
    font-size: var(--text-sm);
    color: var(--text-light);
    line-height: 1.5;
    margin: var(--space-2) 0 0;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.post-card-index__chip {
    justify-self: end;
    font-family: var(--font-mono);
    font-size: 11px;
    color: var(--accent);
    background-color: var(--accent-soft);
    border: 1px solid color-mix(in srgb, var(--accent) 30%, transparent);
    border-radius: var(--radius-sm);
    padding: 4px 9px;
    text-decoration: none;
    white-space: nowrap;
    transition: background-color var(--transition-fast);
}

.post-card-index__chip:hover {
    background-color: var(--accent-muted);
}

.post-card-index__chip--empty {
    background: none;
    border-color: transparent;
    padding: 0;
}

.post-card-index__date {
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--text-light);
    font-variant-numeric: tabular-nums;
    white-space: nowrap;
}

/* Mobile — collapse number/thumb columns */
@media (max-width: 640px) {
    .post-card-index {
        grid-template-columns: 1fr auto;
        gap: var(--space-3) var(--space-4);
    }

    .post-card-index__num {
        display: none;
    }

    .post-card-index__thumb {
        display: none;
    }

    .post-card-index__body {
        grid-column: 1 / -1;
    }

    .post-card-index__date {
        grid-row: 1;
        grid-column: 2;
        justify-self: end;
    }

    .featured-work__title {
        font-size: var(--text-2xl);
    }

    .featured-work__dek {
        font-size: var(--text-base);
    }
}

/* ========================================
   FEATURED LEAD — 2-col hero (image left, editorial text right)
   Home (featured paper) + Blog index (newest post).
   ======================================== */

.featured-lead {
    display: grid;
    grid-template-columns: minmax(0, 46%) 1fr;
    gap: var(--space-12);
    align-items: center;
    margin-bottom: var(--space-16);
}

.featured-lead__media {
    display: flex;
    align-items: center;
    justify-content: center;
    aspect-ratio: 3 / 2;
    padding: var(--space-4);
    background-color: var(--surface-2);
    border: 1px solid var(--border);
    box-shadow: var(--shadow-card);
    overflow: hidden;
}

/* Show the whole illustration (matted on the paper well), not a cropped fill. */
.featured-lead__media img {
    max-width: 100%;
    max-height: 100%;
    width: auto;
    height: auto;
    object-fit: contain;
    border-radius: 0;
}

.featured-lead__media-empty {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100%;
    font-family: var(--font-mono);
    font-size: 11px;
    color: var(--text-light);
    text-transform: uppercase;
    letter-spacing: 0.12em;
}

.featured-lead__eyebrow {
    display: block;
    font-family: var(--font-mono);
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--accent);
    margin-bottom: var(--space-4);
}

.featured-lead__title {
    font-family: var(--font-serif);
    font-weight: 500;
    font-size: var(--text-4xl);
    line-height: 1.1;
    letter-spacing: -0.01em;
    margin: 0 0 var(--space-4);
}

.featured-lead__title a {
    color: var(--text);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.featured-lead__title a:hover {
    color: var(--link);
}

.featured-lead__dek {
    font-family: var(--font-sans);
    font-size: var(--text-base);
    color: var(--text-muted);
    line-height: 1.6;
    margin: 0 0 var(--space-5);
    max-width: 48ch;
}

.featured-lead__meta {
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--text-light);
    margin: 0;
}

.featured-lead__meta-sep {
    margin: 0 var(--space-2);
    color: var(--accent);
}

.featured-lead__cta {
    display: inline-block;
    margin-top: var(--space-5);
    font-family: var(--font-mono);
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--accent);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.featured-lead__cta:hover {
    color: var(--accent-hover);
}

@media (max-width: 768px) {
    .featured-lead {
        grid-template-columns: 1fr;
        gap: var(--space-6);
    }

    .featured-lead__title {
        font-size: var(--text-3xl);
    }
}

/* ========================================
   MASTHEAD — page opener band (Blog "The Journal", Papers)
   ======================================== */

.masthead {
    margin: 0 0 var(--space-12);
    padding: var(--space-4) 0 0;
}

.masthead__head {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: var(--space-10);
}

.masthead__eyebrow {
    display: block;
    font-family: var(--font-mono);
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.14em;
    color: var(--accent);
    margin-bottom: var(--space-4);
}

.masthead__title {
    font-family: var(--font-serif);
    font-style: italic;
    font-weight: 500;
    font-size: var(--text-6xl);
    line-height: 1;
    letter-spacing: -1px;
    color: var(--text);
    margin: 0;
}

.masthead__desc {
    font-family: var(--font-sans);
    font-size: var(--text-base);
    color: var(--text-muted);
    margin: var(--space-4) 0 0;
    max-width: 52ch;
}

.masthead .stats-box {
    flex-shrink: 0;
    margin-top: var(--space-2);
}

@media (max-width: 640px) {
    .masthead__head {
        flex-direction: column;
        gap: var(--space-6);
    }

    .masthead__title {
        font-size: var(--text-5xl);
    }
}

/* ========================================
   FILTER ROW — topic chips (blog + papers)
   ======================================== */

.filter-row {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: var(--space-2);
    margin-bottom: var(--space-10);
}

.filter-row__label {
    font-family: var(--font-mono);
    font-size: 10px;
    text-transform: uppercase;
    letter-spacing: 0.14em;
    color: var(--text-light);
    margin-right: var(--space-3);
}

.filter-chip {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    font-family: var(--font-mono);
    font-size: 11px;
    color: var(--text-muted);
    background-color: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 5px 10px;
    text-decoration: none;
    transition: border-color var(--transition-fast), color var(--transition-fast), background-color var(--transition-fast);
}

.filter-chip:hover {
    border-color: var(--border-strong);
    color: var(--text);
}

.filter-chip.active {
    background-color: var(--text);
    border-color: var(--text);
    color: var(--text-invert);
}

.filter-chip__count {
    color: var(--text-light);
    font-size: 10px;
}

.filter-chip.active .filter-chip__count {
    color: color-mix(in srgb, var(--text-invert) 65%, transparent);
}

/* ========================================
   PAPERS — year groups + structured rows
   ======================================== */

.paper-year {
    margin-bottom: var(--space-12);
}

.paper-year__label {
    font-family: var(--font-mono);
    font-size: 11px;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.14em;
    color: var(--text-light);
    margin: 0 0 var(--space-2);
    padding-bottom: var(--space-3);
}

.paper-list {
    display: flex;
    flex-direction: column;
}

.paper-row {
    display: grid;
    grid-template-columns: 56px 1fr;
    gap: var(--space-6);
    padding: var(--space-8) 0;
    border-top: 1px solid var(--border-light);
}

.paper-list .paper-row:last-child {
    border-bottom: 1px solid var(--border-light);
}

.paper-row__num {
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--text-light);
    padding-top: 6px;
}

.paper-row__body {
    min-width: 0;
}

.paper-row__title {
    font-family: var(--font-serif);
    font-size: var(--text-2xl);
    font-weight: 500;
    line-height: 1.2;
    letter-spacing: -0.01em;
    margin: 0 0 var(--space-2);
}

.paper-row__title a {
    color: var(--text);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.paper-row__title a:hover {
    color: var(--link);
}

.paper-row__authors {
    font-family: var(--font-sans);
    font-size: var(--text-sm);
    color: var(--text-muted);
    margin: 0 0 var(--space-3);
}

.paper-row__abstract {
    font-family: var(--font-sans);
    font-size: var(--text-sm);
    color: var(--text-light);
    line-height: 1.6;
    margin: 0 0 var(--space-4);
    max-width: 720px;
}

.paper-row__links {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
}

.paper-chip {
    font-family: var(--font-mono);
    font-size: 11px;
    color: var(--text-muted);
    background-color: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 4px 9px;
    text-decoration: none;
    transition: border-color var(--transition-fast), color var(--transition-fast);
}

.paper-chip:hover {
    border-color: var(--border-strong);
    color: var(--text);
}

.paper-chip--venue {
    color: var(--accent);
    background-color: var(--accent-soft);
    border-color: color-mix(in srgb, var(--accent) 30%, transparent);
}

@media (max-width: 640px) {
    .paper-row {
        grid-template-columns: 1fr;
        gap: var(--space-2);
    }

    .paper-row__num {
        padding-top: 0;
    }
}

/* ========================================
   BLOG LAYOUT - TWO COLUMN (legacy, category archive)
   ======================================== */

.blog-layout {
    display: grid;
    grid-template-columns: 220px 1fr;
    gap: var(--space-16);
    align-items: start;
}

.blog-sidebar {
    position: sticky;
    top: calc(var(--header-height) + var(--space-8));
}

.blog-sidebar__header {
    position: relative;
    margin-bottom: var(--space-6);
}

.blog-sidebar__header::before {
    content: "";
    position: absolute;
    top: 50%;
    left: -40px;
    width: 30px;
    height: 1px;
    background-color: var(--border);
}

.blog-sidebar__title {
    font-size: var(--text-3xl);
    font-weight: 400;
    margin: 0;
    font-style: italic;
    font-family: var(--font-serif);
    letter-spacing: var(--tracking-tight);
}

.blog-sidebar__stats {
    font-size: var(--text-sm);
    color: var(--text-muted);
    line-height: var(--leading-relaxed);
    font-style: italic;
    margin: 0;
}

.blog-sidebar__stats strong {
    color: var(--text);
    font-weight: 500;
}

.blog-sidebar__description {
    font-size: var(--text-sm);
    color: var(--text-muted);
    line-height: var(--leading-relaxed);
    margin: var(--space-5) 0 0;
    font-style: italic;
    font-family: var(--font-serif);
}

.blog-content {
    min-width: 0;
}

.blog-intro {
    margin-bottom: var(--space-10);
    font-size: var(--text-lg);
    color: var(--text-muted);
    font-style: italic;
    font-family: var(--font-serif);
    line-height: var(--leading-relaxed);
}

.blog-intro p {
    margin: 0;
}

/* ========================================
   SECTION HEADER - Editorial structure cue
   ======================================== */

.section-header {
    font-family: var(--font-mono);
    font-size: 11px;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--text-light);
    margin: 0 0 var(--space-8);
    padding-bottom: var(--space-4);
    position: relative;
}

/* Short accent tick under the section eyebrow. */
.section-header::after {
    content: "";
    position: absolute;
    bottom: 0;
    left: 0;
    width: 28px;
    height: 2px;
    background-color: var(--accent);
}

/* ========================================
   POSTS LIST
   ======================================== */

.posts-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-6);
}

/* ========================================
   POST CARD - EDITORIAL INDEX ENTRY
   Cards that feel anchored, resting on paper
   ======================================== */

.post-card {
    display: grid;
    grid-template-columns: 160px 1fr;
    gap: var(--space-6);
    padding: var(--space-5) var(--space-6);
    background-color: var(--surface);
    border: 1px solid var(--border);
    border-bottom-width: 2px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-card);
    transition: all var(--transition-fast);
    will-change: transform;
}

.post-card:hover {
    border-color: var(--border-strong);
    box-shadow: var(--shadow-md);
    transform: translateY(-1px);
}

/* Thumbnail - paper-framed image tile */
.post-card__thumbnail {
    aspect-ratio: 1;
    overflow: hidden;
    border-radius: var(--radius-lg);
    background-color: var(--surface-2);
    border: 1px solid var(--border-light);
    flex-shrink: 0;
}

.post-card__thumbnail img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: opacity var(--transition-slow);
}

.post-card:hover .post-card__thumbnail img {
    opacity: 0.95;
}

.post-card__placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-light);
    background-color: var(--surface-2);
    text-decoration: none;
}

.post-card__placeholder svg {
    opacity: 0.35;
}

/* Body */
.post-card__body {
    display: flex;
    justify-content: space-between;
    gap: var(--space-5);
    min-width: 0;
}

.post-card__main {
    flex: 1;
    min-width: 0;
}

/* Title - PRIMARY hierarchy: prominent, immediately draws eye */
.post-card__title {
    font-size: var(--text-xl);
    font-weight: 600;
    font-family: var(--font-sans);
    margin: 0 0 var(--space-2);
    line-height: var(--leading-snug);
    letter-spacing: var(--tracking-tight);
}

.post-card__title a {
    color: var(--text);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.post-card__title a:hover {
    color: var(--link);
}

/* Excerpt - SECONDARY hierarchy: clearly subordinate */
.post-card__excerpt {
    font-size: var(--text-base);
    color: var(--text-muted);
    margin: 0 0 var(--space-3);
    line-height: 1.6;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.post-card__excerpt a {
    color: inherit;
    text-decoration: none;
}

/* Tags */
.post-card__tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
}

.post-card__tag {
    font-family: var(--font-mono);
    font-size: 11px;
    color: var(--accent);
    background-color: var(--accent-soft);
    border: 1px solid color-mix(in srgb, var(--accent) 30%, transparent);
    border-radius: var(--radius-sm);
    padding: 3px 8px;
    text-decoration: none;
    transition: background-color var(--transition-fast);
}

.post-card__tag:hover {
    background-color: var(--accent-muted);
}

/* Meta - TERTIARY hierarchy: ambient, clearly secondary */
.post-card__meta {
    flex-shrink: 0;
    text-align: right;
    padding-top: var(--space-1);
}

.post-card__date {
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--text-light);
    white-space: nowrap;
    font-variant-numeric: tabular-nums;
}

/* ========================================
   CATEGORY FILTERS - TACTILE CHIPS
   Visible states with accent highlighting
   ======================================== */

.category-filters {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
    margin-bottom: var(--space-10);
}

.category-filter {
    display: inline-flex;
    align-items: center;
    gap: var(--space-1);
    padding: var(--space-2) var(--space-4);
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--chip-text);
    background-color: var(--chip-bg);
    border: 1px solid var(--chip-border);
    border-radius: var(--radius-full);
    text-decoration: none;
    transition: all var(--transition-fast);
    /* Tactile depth */
    box-shadow: inset 0 -1px 0 rgba(0, 0, 0, 0.04);
}

.category-filter:hover {
    color: var(--chip-hover-text);
    border-color: var(--chip-hover-border);
    background-color: var(--chip-hover-bg);
    box-shadow: inset 0 1px 2px rgba(0, 0, 0, 0.06);
}

.category-filter:focus {
    outline: 2px solid var(--focus-ring);
    outline-offset: 2px;
}

.category-filter:focus:not(:focus-visible) {
    outline: none;
}

/* ACTIVE state - accent colored, obvious without blur test */
.category-filter.active,
.category-filter.current-cat a {
    color: var(--chip-active-text);
    background-color: var(--chip-active-bg);
    border-color: var(--chip-active-border);
    font-weight: 600;
    box-shadow: inset 0 1px 2px rgba(0, 0, 0, 0.08);
}

.category-filter .category-count {
    font-size: var(--text-xs);
    opacity: 0.6;
    margin-left: var(--space-1);
}

/* ========================================
   BUTTONS
   ======================================== */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-6);
    font-size: var(--text-sm);
    font-weight: 500;
    text-decoration: none;
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    cursor: pointer;
}

.btn:focus {
    outline: 2px solid var(--focus-ring);
    outline-offset: 2px;
}

.btn:focus:not(:focus-visible) {
    outline: none;
}

.btn--primary {
    color: var(--text-invert);
    background-color: var(--text);
    border: 1px solid var(--text);
}

.btn--primary:hover {
    background-color: var(--accent);
    border-color: var(--accent);
    color: var(--text-invert);
}

.btn--secondary {
    color: var(--text);
    background-color: transparent;
    border: 1px solid var(--border);
}

.btn--secondary:hover {
    background-color: var(--surface);
    border-color: var(--border-strong);
}

.btn--ghost {
    color: var(--text-muted);
    background-color: transparent;
    border: 1px solid transparent;
}

.btn--ghost:hover {
    color: var(--text);
    background-color: var(--surface);
}

/* ========================================
   SHARE BUTTONS
   ======================================== */

.share-buttons {
    display: flex;
    gap: var(--space-3);
    margin-top: var(--space-10);
    padding-top: var(--space-8);
    border-top: 1px solid var(--border-light);
}

.share-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    color: var(--text-muted);
    background-color: var(--surface);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.share-btn:hover {
    color: var(--text);
    background-color: var(--surface-2);
    border-color: var(--border);
}

.share-btn:focus {
    outline: 2px solid var(--focus-ring);
    outline-offset: 2px;
}

.share-btn:focus:not(:focus-visible) {
    outline: none;
}

.copy-link-btn.copy-success {
    color: var(--accent);
}

.copy-link-btn.copy-success svg,
.copy-link-btn.copy-fail svg {
    display: none;
}

.copy-link-btn.copy-success::after {
    content: "\2713";
    font-size: 1.125rem;
    line-height: 1;
}

.copy-link-btn.copy-fail::after {
    content: "\2717";
    font-size: 1.125rem;
    line-height: 1;
}

/* ========================================
   BIO SECTION - Reading width
   ======================================== */

.bio-section {
    max-width: var(--width-reading);
    margin: 0 auto var(--space-16);
    padding-bottom: var(--space-12);
    border-bottom: 1px solid var(--border-light);
}

.bio-section__content {
    font-size: var(--text-lg);
    line-height: var(--leading-loose);
    color: var(--text);
}

.bio-section__content p:last-child {
    margin-bottom: 0;
}

/* ========================================
   PAGE HEADER - Reading width
   ======================================== */

.page-header {
    max-width: var(--width-reading);
    margin: 0 auto var(--space-12);
    text-align: center;
}

.page-header__title {
    margin-bottom: var(--space-4);
}

.page-header__description {
    font-size: var(--text-lg);
    color: var(--text-muted);
    margin: 0;
    line-height: var(--leading-relaxed);
}

/* ========================================
   ENTRY CONTENT - Reading width for body text
   ======================================== */

.entry-content {
    max-width: var(--width-reading);
    margin: 0 auto;
    /* Break long unbroken strings (e.g. auto-linked source URLs) so they
       never force horizontal overflow on narrow screens. */
    overflow-wrap: break-word;
}

.entry-content a {
    word-break: break-word;
}

.entry-content > *:first-child {
    margin-top: 0;
}

.entry-content > *:last-child {
    margin-bottom: 0;
}

/* ========================================
   SINGLE POST - Spacious reading layout
   ======================================== */

.single-post__header {
    margin-bottom: var(--space-10);
    max-width: var(--width-reading);
    margin-left: auto;
    margin-right: auto;
}

.single-post__eyebrow {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 13px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--accent);
    text-decoration: none;
    margin-bottom: var(--space-5);
}

.single-post__eyebrow:hover {
    color: var(--accent-hover);
}

.single-post__title {
    font-family: var(--font-serif);
    font-size: 2.75rem;
    font-weight: 500;
    line-height: 1.1;
    margin-bottom: var(--space-6);
    letter-spacing: -0.01em;
}

.single-post__meta {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: var(--space-2);
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--text-light);
}

.single-post__meta-sep {
    color: var(--accent);
}

.single-post__chip {
    color: var(--accent);
    background-color: var(--accent-soft);
    border: 1px solid color-mix(in srgb, var(--accent) 30%, transparent);
    border-radius: var(--radius-sm);
    padding: 2px 8px;
    text-decoration: none;
    transition: background-color var(--transition-fast);
}

.single-post__chip:hover {
    background-color: var(--accent-muted);
}

.single-post__featured-image {
    margin: 0 auto var(--space-12);
    max-width: var(--width-reading);
    padding: var(--space-3);
    overflow: hidden;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background-color: var(--surface-2);
}

/* Show the whole illustration at its natural proportions — never cropped. */
.single-post__featured-image img {
    display: block;
    width: 100%;
    height: auto;
    border-radius: 0;
}

.single-post__content {
    margin-bottom: var(--space-12);
    font-family: var(--font-serif);
    font-size: var(--text-xl);
    line-height: 1.7;
}

.single-post__footer {
    max-width: var(--width-reading);
    margin-left: auto;
    margin-right: auto;
}

/* Single paper: authors + links under the meta row */
.single-paper__authors {
    font-family: var(--font-sans);
    font-size: var(--text-sm);
    color: var(--text-muted);
    margin: var(--space-4) 0 var(--space-3);
    max-width: var(--width-reading);
    margin-left: auto;
    margin-right: auto;
}

.single-paper__links {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
    max-width: var(--width-reading);
    margin: 0 auto;
}

/* Article tag chips above the share row */
.single-post__tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
    margin-bottom: var(--space-6);
}

.single-post__tag {
    font-family: var(--font-mono);
    font-size: 11px;
    color: var(--accent);
    background-color: var(--accent-soft);
    border: 1px solid color-mix(in srgb, var(--accent) 30%, transparent);
    border-radius: var(--radius-sm);
    padding: 4px 9px;
    text-decoration: none;
    transition: background-color var(--transition-fast);
}

.single-post__tag:hover {
    background-color: var(--accent-muted);
}

/* ========================================
   POST NAVIGATION — two-up, mono labels + serif titles
   ======================================== */

.post-navigation {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-8);
    margin-top: var(--space-16);
    padding-top: var(--space-10);
    border-top: 1px solid var(--border);
    max-width: var(--width-reading);
    margin-left: auto;
    margin-right: auto;
}

.post-navigation__link {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.post-navigation__link--next {
    text-align: right;
}

.post-navigation__link:focus-visible {
    outline: 2px solid var(--focus-ring);
    outline-offset: 4px;
}

.post-navigation__label {
    font-family: var(--font-mono);
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--text-light);
}

.post-navigation__link--prev .post-navigation__label::before {
    content: "\2190 ";
}

.post-navigation__link--next .post-navigation__label::after {
    content: " \2192";
}

.post-navigation__link:hover .post-navigation__label {
    color: var(--accent);
}

.post-navigation__title {
    font-family: var(--font-serif);
    font-size: var(--text-lg);
    font-weight: 500;
    line-height: 1.2;
    color: var(--text);
}

/* ========================================
   SEARCH FORM
   ======================================== */

.search-form {
    display: flex;
    gap: var(--space-2);
}

.search-form__input {
    flex: 1;
    padding: var(--space-3) var(--space-4);
    font-size: var(--text-base);
    color: var(--text);
    background-color: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.search-form__input:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-soft);
}

.search-form__input::placeholder {
    color: var(--text-light);
}

.search-form__submit {
    padding: var(--space-3) var(--space-5);
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--text-invert);
    background-color: var(--accent);
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: background-color var(--transition-fast);
}

.search-form__submit:hover {
    background-color: var(--accent-hover);
}

/* ========================================
   NO RESULTS
   ======================================== */

.no-results {
    text-align: center;
    padding: var(--space-20) 0;
}

.no-results__title {
    margin-bottom: var(--space-4);
}

.no-results__description {
    color: var(--text-muted);
    margin-bottom: var(--space-6);
}

/* ========================================
   COMMENTS - Reading width
   ======================================== */

.comments-area {
    max-width: var(--width-reading);
    margin: 0 auto;
    padding-top: var(--space-12);
    border-top: 1px solid var(--border-light);
}

.comments-title {
    font-size: var(--text-2xl);
}

.comment-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.comment-list .children {
    list-style: none;
    padding-left: var(--space-8);
    margin: 0;
    border-left: 2px solid var(--border-light);
}

.comment-body {
    padding: var(--space-5);
    margin-bottom: var(--space-4);
    background-color: var(--surface);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-md);
    transition: background-color var(--transition-base);
}

.comment-meta {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: var(--space-3);
    margin-bottom: var(--space-4);
}

.comment-author {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.comment-author .avatar {
    border-radius: var(--radius-full);
}

.comment-author .fn {
    font-weight: 600;
    color: var(--text);
}

.comment-author .fn a {
    color: inherit;
    text-decoration: none;
}

.comment-metadata {
    font-size: var(--text-sm);
    color: var(--text-muted);
}

.comment-metadata a {
    color: inherit;
}

.comment-content {
    font-size: var(--text-base);
    line-height: var(--leading-relaxed);
}

.comment-content p:last-child {
    margin-bottom: 0;
}

.reply {
    margin-top: var(--space-3);
}

.reply a {
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--accent);
}

/* Comment Form */
.comment-form {
    margin-top: var(--space-8);
}

.comment-reply-title {
    font-size: var(--text-xl);
}

.comment-form label {
    display: block;
    margin-bottom: var(--space-2);
    font-weight: 500;
    color: var(--text);
}

.comment-form input[type="text"],
.comment-form input[type="email"],
.comment-form input[type="url"],
.comment-form textarea {
    width: 100%;
    padding: var(--space-3) var(--space-4);
    font-size: var(--text-base);
    color: var(--text);
    background-color: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.comment-form input:focus,
.comment-form textarea:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-soft);
}

.comment-form textarea {
    min-height: 150px;
    resize: vertical;
}

.comment-form .comment-form-comment,
.comment-form .comment-form-author,
.comment-form .comment-form-email,
.comment-form .comment-form-url {
    margin-bottom: var(--space-4);
}

.comment-form .form-submit {
    margin-top: var(--space-4);
}

.comment-form .submit {
    padding: var(--space-3) var(--space-6);
    font-size: var(--text-base);
    font-weight: 500;
    color: var(--text-invert);
    background-color: var(--accent);
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: background-color var(--transition-fast);
}

.comment-form .submit:hover {
    background-color: var(--accent-hover);
}

/* Comment Navigation */
.comment-navigation {
    display: flex;
    justify-content: space-between;
    margin: var(--space-6) 0;
    padding: var(--space-4) 0;
    border-top: 1px solid var(--border-light);
    border-bottom: 1px solid var(--border-light);
}

.comment-navigation a {
    font-size: var(--text-sm);
    font-weight: 500;
}

/* ========================================
   RESPONSIVE - MOBILE ADJUSTMENTS
   ======================================== */

@media (max-width: 900px) {
    .blog-layout {
        grid-template-columns: 1fr;
        gap: var(--space-10);
    }

    .blog-sidebar {
        position: static;
        text-align: center;
    }

    .blog-sidebar__header::before {
        display: none;
    }

    .blog-intro {
        text-align: center;
    }

    .category-filters {
        justify-content: center;
    }
}

@media (max-width: 768px) {
    .post-card {
        grid-template-columns: 120px 1fr;
        gap: var(--space-4);
        padding: var(--space-4) var(--space-5);
    }

    .post-card__body {
        flex-direction: column;
        gap: var(--space-2);
    }

    .post-card__meta {
        text-align: left;
    }

    .post-card__title {
        font-size: var(--text-lg);
    }

    .post-card__excerpt {
        font-size: var(--text-sm);
    }

    .post-navigation {
        grid-template-columns: 1fr;
    }

    .single-post__title {
        font-size: var(--text-3xl);
    }
}

@media (max-width: 480px) {
    .post-card {
        grid-template-columns: 100px 1fr;
        gap: var(--space-3);
        padding: var(--space-4);
    }

    .post-card__title {
        font-size: var(--text-base);
    }

    .post-card__excerpt {
        -webkit-line-clamp: 1;
        font-size: var(--text-sm);
    }

    .share-buttons {
        justify-content: center;
    }

    .category-filters {
        gap: var(--space-2);
    }

    .category-filter {
        padding: var(--space-2) var(--space-3);
        font-size: var(--text-xs);
    }
}

/* ========================================
   READING PROGRESS BAR
   ======================================== */

.reading-progress {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    z-index: 200;
    background-color: transparent;
    pointer-events: none;
}

.reading-progress__bar {
    height: 100%;
    background-color: var(--accent);
    transform-origin: left;
    transform: scaleX(0);
    transition: transform 50ms linear;
}

/* ========================================
   BACK TO TOP BUTTON
   ======================================== */

.back-to-top {
    position: fixed;
    bottom: var(--space-8);
    right: var(--space-8);
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    background-color: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-full);
    box-shadow: var(--shadow-md);
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transform: translateY(8px);
    transition: opacity var(--transition-base), visibility var(--transition-base), transform var(--transition-base), background-color var(--transition-fast), color var(--transition-fast);
    z-index: 50;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    color: var(--text);
    background-color: var(--surface-2);
    border-color: var(--border-strong);
}

.back-to-top:focus {
    outline: 2px solid var(--focus-ring);
    outline-offset: 2px;
}

.back-to-top:focus:not(:focus-visible) {
    outline: none;
}