/* ui_kits/blog/blog.css — Opteryx Blog UI kit
   Editorial pattern, designed from scratch on brand tokens. */
@import url("/css/style.css");

* {
    box-sizing: border-box;
}
html,
body {
    margin: 0;
    padding: 0;
}
body {
    font-family: var(--font-body);
    color: var(--text);
    background: var(--bg);
    -webkit-font-smoothing: antialiased;
    font-size: 15px;
    line-height: 1.6;
}
a {
    color: var(--opteryx-teal);
    text-decoration: none;
}
a:hover {
    text-decoration: underline;
    text-underline-offset: 3px;
}

/* ============== Reading progress (top hairline) =================== */
.read-progress {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    z-index: 40;
    background: transparent;
    pointer-events: none;
}
.read-progress > span {
    display: block;
    height: 100%;
    background: var(--opteryx-teal);
    width: 0%;
    transition: width 80ms linear;
}

/* ============== Header ============================================ */
.blog-header {
    position: sticky;
    top: 0;
    z-index: 30;
    background: rgba(255, 255, 255, 0.78);
    backdrop-filter: saturate(140%) blur(8px);
    -webkit-backdrop-filter: saturate(140%) blur(8px);
    border-bottom: 1px solid var(--border);
}
.blog-header-inner {
    display: flex;
    align-items: center;
    gap: 24px;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 28px;
    height: 60px;
}
.blog-logo {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 15px;
    color: var(--text-deep);
}
.blog-logo img {
    width: 22px;
    height: 22px;
    display: block;
}
.blog-logo .sep {
    color: var(--muted-2);
    margin: 0 2px;
    font-weight: 400;
}
.blog-logo .pill {
    font-family: var(--font-display);
    font-weight: 500;
    font-size: 11px;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--opteryx-teal);
    padding: 2px 8px;
    border-radius: var(--r-pill);
    background: var(--accent-soft);
}
.blog-nav {
    display: flex;
    gap: 22px;
    margin-left: 6px;
}
.blog-nav a {
    font-family: var(--font-display);
    font-weight: 500;
    font-size: 13.5px;
    color: var(--text-deep);
}
.blog-nav a:hover {
    color: var(--opteryx-teal);
    text-decoration: none;
}
.blog-nav a.active {
    color: var(--opteryx-teal);
}

.header-spacer {
    flex: 1;
}

.blog-search {
    display: flex;
    align-items: center;
    gap: 8px;
    background: var(--muted-surface);
    border: 1px solid var(--border);
    border-radius: var(--r-m);
    padding: 0 10px;
    height: 32px;
    width: 220px;
    color: var(--muted-2);
}
.blog-search input {
    border: none;
    outline: none;
    background: transparent;
    flex: 1;
    font-family: var(--font-body);
    font-size: 13px;
    color: var(--text-deep);
}
.blog-search input::placeholder {
    color: var(--muted-2);
}
.blog-search kbd {
    font-family: var(--font-mono);
    font-size: 10.5px;
    background: #fff;
    border: 1px solid var(--border-2);
    color: var(--muted);
    padding: 1px 5px;
    border-radius: var(--r-xs);
}
.blog-cta {
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 13px;
    background: var(--opteryx-teal);
    color: #fff;
    padding: 8px 14px;
    border-radius: var(--r-m);
}
.blog-cta:hover {
    background: #086163;
    text-decoration: none;
}

/* ============== Page-level wrappers =============================== */
.page {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 28px 96px;
}
.page-narrow {
    max-width: 760px;
    margin: 0 auto;
    padding: 0 28px 80px;
}

/* ============== Simple masthead =================================== */
.index-masthead-simple {
    padding: 72px 0 40px;
    border-bottom: 1px solid var(--border);
    margin-bottom: 8px;
}
.index-masthead-simple h1 {
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 44px;
    line-height: 1.1;
    letter-spacing: -0.015em;
    color: var(--text-deep);
    margin: 14px 0 16px;
}
.index-masthead-simple h1 em {
    font-style: normal;
    color: var(--opteryx-teal);
}
.index-masthead-simple .lede {
    font-size: 17px;
    color: var(--text);
    line-height: 1.55;
    margin: 0 0 20px;
    max-width: 620px;
    text-wrap: pretty;
}
.masthead-foot {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--muted);
}
.masthead-foot .sep {
    color: var(--muted-2);
}
.masthead-foot a {
    color: var(--opteryx-teal);
}

/* ============== Simple post list ================================= */
.post-list {
    padding: 8px 0 0;
}

/* ============== Simple footer ==================================== */
.blog-footer-simple {
    border-top: 1px solid var(--border);
    background: #fff;
    padding: 22px 0;
    margin-top: 24px;
}
.blog-footer-simple-inner {
    max-width: 760px;
    margin: 0 auto;
    padding: 0 28px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-family: var(--font-mono);
    font-size: 11.5px;
    color: var(--muted);
}
.blog-footer-simple-inner .links {
    display: flex;
    gap: 16px;
}
.blog-footer-simple-inner a {
    color: var(--muted);
}
.blog-footer-simple-inner a:hover {
    color: var(--opteryx-teal);
    text-decoration: none;
}

/* ============== Engineering-blog hero + grid ===================== */
.lead {
    padding: 48px 0 36px;
}
.lead-card {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 40px;
    border: 1px solid var(--border);
    border-radius: var(--r-s);
    background: #fff;
    overflow: hidden;
    text-decoration: none;
    transition:
        border-color var(--t-fast),
        box-shadow var(--t-base);
}
.lead-card:hover {
    border-color: rgba(7, 121, 124, 0.3);
    box-shadow: var(--shadow-m);
    text-decoration: none;
}
.lead-art {
    position: relative;
    background: linear-gradient(
        135deg,
        rgba(7, 121, 124, 0.1),
        rgba(31, 46, 97, 0.04) 70%
    );
    min-height: 360px;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 32px;
}
.lead-art-stripes {
    position: absolute;
    inset: 0;
    background-image: repeating-linear-gradient(
        135deg,
        rgba(7, 121, 124, 0.07) 0 1px,
        transparent 1px 18px
    );
}
.lead-art-panel {
    position: relative;
    z-index: 1;
    background: rgba(255, 255, 255, 0.85);
    border: 1px solid var(--border);
    border-radius: var(--r-xs);
    padding: 16px 18px;
    font-family: var(--font-mono);
    font-size: 12px;
    line-height: 1.7;
    color: var(--text-deep);
    backdrop-filter: blur(4px);
    box-shadow: var(--shadow-m);
}
.lead-art-panel .lbl {
    display: block;
    font-family: var(--font-display);
    font-size: 10.5px;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--muted);
    margin-bottom: 8px;
}
.lead-art-panel .ln {
    display: block;
}
.lead-art-panel .tok-kw {
    color: var(--opteryx-teal);
    font-weight: 600;
}
.lead-art-panel .tok-fn {
    color: var(--opteryx-navy);
    font-weight: 600;
}
.lead-art-panel .tok-com {
    color: var(--muted-2);
    font-style: italic;
}
.lead-body {
    padding: 36px 36px 32px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}
.lead-cat {
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 11px;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--opteryx-teal);
    margin-bottom: 14px;
}
.lead-body h2 {
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 32px;
    line-height: 1.18;
    letter-spacing: -0.012em;
    color: var(--text-deep);
    margin: 0 0 14px;
    text-wrap: balance;
}
.lead-card:hover .lead-body h2 {
    color: var(--opteryx-teal);
}
.lead-body p {
    font-size: 15.5px;
    color: var(--muted);
    line-height: 1.55;
    margin: 0 0 22px;
}
.lead-foot {
    display: flex;
    align-items: center;
    gap: 10px;
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--muted);
}
.lead-foot .who {
    color: var(--text-deep);
    font-family: var(--font-display);
    font-weight: 500;
    font-size: 13px;
}
.lead-foot .sep {
    color: var(--muted-2);
}
@media (max-width: 880px) {
    .lead-card {
        grid-template-columns: 1fr;
    }
    .lead-art {
        min-height: 220px;
    }
    .lead-body {
        padding: 28px;
    }
    .lead-body h2 {
        font-size: 26px;
    }
}

/* Category bar */
.cat-bar {
    display: flex;
    align-items: center;
    gap: 8px;
    margin: 16px 0 32px;
    padding: 10px 0;
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
    overflow-x: auto;
    scrollbar-width: none;
}
.cat-bar::-webkit-scrollbar {
    display: none;
}
.cat-bar a {
    font-family: var(--font-display);
    font-weight: 500;
    font-size: 13px;
    color: var(--muted);
    padding: 6px 12px;
    border-radius: var(--r-pill);
    white-space: nowrap;
    text-decoration: none;
}
.cat-bar a:hover {
    color: var(--text-deep);
    background: var(--muted-surface);
}
.cat-bar a.active {
    color: var(--opteryx-teal);
    background: var(--accent-soft);
}
.cat-bar-spacer {
    flex: 1;
}
.cat-bar a.rss {
    font-family: var(--font-mono);
    font-size: 11.5px;
    color: var(--muted);
    border: 1px solid var(--border);
}
.cat-bar a.rss:hover {
    color: var(--opteryx-teal);
    border-color: rgba(7, 121, 124, 0.3);
    background: #fff;
}

/* Card grid */
.card-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 28px;
}
@media (max-width: 1080px) {
    .card-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}
@media (max-width: 640px) {
    .card-grid {
        grid-template-columns: 1fr;
    }
}

.post-card {
    display: flex;
    flex-direction: column;
    border: 1px solid var(--border);
    border-radius: var(--r-s);
    background: #fff;
    overflow: hidden;
    text-decoration: none;
    transition:
        border-color var(--t-fast),
        box-shadow var(--t-base),
        transform var(--t-fast);
}
.post-card:hover {
    border-color: rgba(7, 121, 124, 0.3);
    box-shadow: var(--shadow-m);
    text-decoration: none;
}
.post-card-art {
    aspect-ratio: 16 / 9;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    border-bottom: 1px solid var(--border);
    background-image: repeating-linear-gradient(
        135deg,
        rgba(31, 46, 97, 0.06) 0 1px,
        transparent 1px 16px
    );
}
.post-card-art.tone-teal {
    background-color: var(--opteryx-pale-teal);
}
.post-card-art.tone-orange {
    background-color: rgba(254, 119, 1, 0.05);
}
.post-card-art.tone-navy {
    background-color: rgba(31, 46, 97, 0.04);
}
.post-card-art .art-glyph {
    font-family: var(--font-mono);
    font-weight: 700;
    font-size: 18px;
    letter-spacing: 0.02em;
    color: var(--text-deep);
    background: rgba(255, 255, 255, 0.7);
    border: 1px solid var(--border);
    padding: 7px 14px;
    border-radius: var(--r-xs);
    backdrop-filter: blur(2px);
}
.post-card-art.tone-teal .art-glyph {
    color: var(--opteryx-teal);
}
.post-card-art.tone-orange .art-glyph {
    color: var(--opteryx-orange);
}
.post-card-art.tone-navy .art-glyph {
    color: var(--opteryx-navy);
}
.post-card-body {
    padding: 20px 22px 22px;
    display: flex;
    flex-direction: column;
    flex: 1;
}
.post-card-cat {
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 10.5px;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--opteryx-teal);
    margin-bottom: 10px;
}
.post-card h3 {
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 19px;
    line-height: 1.3;
    letter-spacing: -0.005em;
    color: var(--text-deep);
    margin: 0 0 10px;
    text-wrap: balance;
}
.post-card:hover h3 {
    color: var(--opteryx-teal);
}
.post-card p {
    font-size: 14px;
    color: var(--muted);
    line-height: 1.55;
    margin: 0 0 16px;
    display: -webkit-box;
    line-clamp: 3;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
    flex: 1;
}
.post-card-foot {
    display: flex;
    align-items: center;
    gap: 8px;
    font-family: var(--font-mono);
    font-size: 11.5px;
    color: var(--muted-2);
    border-top: 1px solid var(--border);
    padding-top: 12px;
}
.post-card-foot .sep {
    color: var(--border-2);
}

.grid-footer {
    margin-top: 36px;
    text-align: center;
}

.grid-heading {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    margin: 56px 0 24px;
    padding-bottom: 14px;
    border-bottom: 1px solid var(--border);
}
.grid-heading h3 {
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 13px;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--muted);
    margin: 0;
}
.rss-inline {
    font-family: var(--font-mono);
    font-size: 11.5px;
    color: var(--muted);
    text-decoration: none;
}
.rss-inline:hover {
    color: var(--opteryx-teal);
}
.more-link {
    display: inline-block;
    font-family: var(--font-display);
    font-weight: 500;
    font-size: 14px;
    color: var(--opteryx-teal);
    padding: 10px 20px;
    border: 1px solid rgba(7, 121, 124, 0.3);
    border-radius: var(--r-xs);
    text-decoration: none;
}
.more-link:hover {
    background: var(--accent-soft);
    text-decoration: none;
}
.eyebrow {
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 11px;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--opteryx-teal);
}
.section-rule {
    border: none;
    border-top: 1px solid var(--border);
    margin: 0;
}

/* ============== Index — masthead =================================== */
.index-masthead {
    padding: 56px 0 36px;
    border-bottom: 1px solid var(--border);
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: end;
    gap: 32px;
}
.index-masthead h1 {
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 56px;
    line-height: 1.05;
    letter-spacing: -0.02em;
    color: var(--text-deep);
    margin: 12px 0 14px;
    max-width: 760px;
}
.index-masthead h1 em {
    font-style: normal;
    color: var(--opteryx-teal);
}
.index-masthead .lede {
    font-size: 17px;
    color: var(--text);
    line-height: 1.55;
    max-width: 640px;
    margin: 0;
}
.masthead-meta {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 10px;
    font-family: var(--font-mono);
    font-size: 11.5px;
    color: var(--muted);
}
.masthead-meta .row {
    display: flex;
    gap: 14px;
}
.masthead-meta .num {
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 22px;
    color: var(--text-deep);
    letter-spacing: -0.01em;
    line-height: 1;
}
.masthead-meta .lbl {
    font-family: var(--font-display);
    font-size: 10.5px;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--muted);
    margin-top: 4px;
}
.masthead-meta .stat {
    text-align: right;
    border-left: 1px solid var(--border);
    padding-left: 18px;
}
.masthead-meta .stat:first-child {
    border-left: none;
    padding-left: 0;
}

/* ============== Index — featured ================================== */
.featured {
    display: grid;
    grid-template-columns: 1.15fr 1fr;
    gap: 48px;
    padding: 40px 0 56px;
    border-bottom: 1px solid var(--border);
}
.featured-art {
    border: 1px solid var(--border);
    border-radius: var(--r-xl);
    overflow: hidden;
    background: linear-gradient(
        135deg,
        rgba(7, 121, 124, 0.06),
        rgba(31, 46, 97, 0.04)
    );
    aspect-ratio: 4 / 3;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}
.featured-art .corner {
    position: absolute;
    top: 14px;
    left: 14px;
    font-family: var(--font-mono);
    font-size: 11px;
    color: var(--opteryx-teal);
    background: rgba(255, 255, 255, 0.7);
    border: 1px solid var(--border);
    padding: 2px 8px;
    border-radius: var(--r-pill);
    backdrop-filter: blur(4px);
}
.featured-art .glyph {
    width: 64%;
    height: 64%;
    background-image:
        linear-gradient(
            135deg,
            rgba(7, 121, 124, 0.2),
            rgba(7, 121, 124, 0.05) 60%
        ),
        repeating-linear-gradient(
            135deg,
            rgba(7, 121, 124, 0.1) 0 1px,
            transparent 1px 14px
        );
    border: 1px solid rgba(7, 121, 124, 0.2);
    border-radius: var(--r-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-mono);
    font-size: 11.5px;
    color: rgba(7, 121, 124, 0.7);
}
.featured-body {
    display: flex;
    flex-direction: column;
    justify-content: center;
}
.featured-body .crumbs {
    display: flex;
    align-items: center;
    gap: 10px;
    font-family: var(--font-mono);
    font-size: 11.5px;
    color: var(--muted);
    margin-bottom: 18px;
}
.featured-body .crumbs .dot {
    width: 3px;
    height: 3px;
    background: var(--muted-2);
    border-radius: 50%;
    display: inline-block;
}
.featured-body h2 {
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 36px;
    line-height: 1.15;
    letter-spacing: -0.01em;
    color: var(--text-deep);
    margin: 0 0 16px;
}
.featured-body h2 a {
    color: inherit;
}
.featured-body h2 a:hover {
    color: var(--opteryx-teal);
    text-decoration: none;
}
.featured-body .lede {
    font-size: 16px;
    color: var(--text);
    line-height: 1.6;
    margin: 0 0 22px;
}
.featured-body .author-line {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 13px;
    color: var(--muted);
}
.author-avatar {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: var(--opteryx-pale-teal);
    border: 1px solid rgba(7, 121, 124, 0.25);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 11.5px;
    color: var(--opteryx-teal);
    flex-shrink: 0;
}
.author-line .name {
    color: var(--text-deep);
    font-weight: 500;
}
.author-line .sep {
    color: var(--muted-2);
}

/* ============== Index — body grid ================================== */
.index-body {
    display: grid;
    grid-template-columns: 200px minmax(0, 1fr);
    gap: 48px;
    padding: 40px 0 0;
}

/* Tag rail */
.tag-rail {
    position: sticky;
    top: 84px;
    padding-right: 8px;
    align-self: start;
}
.tag-rail .rail-title {
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 11.5px;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--muted);
    margin-bottom: 14px;
}
.tag-list {
    list-style: none;
    padding: 0;
    margin: 0 0 24px;
    display: flex;
    flex-direction: column;
}
.tag-list li {
    display: flex;
    align-items: center;
    padding: 6px 0;
    font-size: 13.5px;
    color: var(--text-deep);
    border-bottom: 1px dashed var(--border);
    cursor: pointer;
}
.tag-list li:hover {
    color: var(--opteryx-teal);
}
.tag-list li.active {
    color: var(--opteryx-teal);
    font-weight: 500;
}
.tag-list .name {
    flex: 1;
}
.tag-list .count {
    font-family: var(--font-mono);
    font-size: 11.5px;
    color: var(--muted-2);
}
.tag-list li.active .count {
    color: var(--opteryx-teal);
}
.rail-meta {
    font-family: var(--font-mono);
    font-size: 11px;
    color: var(--muted);
    line-height: 1.7;
    padding-top: 14px;
    border-top: 1px solid var(--border);
}
.rail-meta a {
    color: var(--opteryx-teal);
}
.rail-meta .feeds {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    margin-top: 8px;
}
.rail-meta .feeds a {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 3px 8px;
    border: 1px solid var(--border);
    border-radius: var(--r-pill);
    background: #fff;
    color: var(--muted);
    font-family: var(--font-mono);
    font-size: 10.5px;
    text-decoration: none;
}
.rail-meta .feeds a:hover {
    color: var(--opteryx-teal);
    border-color: rgba(7, 121, 124, 0.3);
}

/* ============== Archive list ======================================= */
.archive-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 4px;
}
.archive-bar .crumbs {
    display: flex;
    align-items: center;
    gap: 10px;
    font-family: var(--font-display);
    font-size: 13px;
    color: var(--muted);
}
.archive-bar .crumbs strong {
    color: var(--text-deep);
    font-weight: 600;
}
.archive-bar .sort {
    display: inline-flex;
    gap: 14px;
    font-family: var(--font-mono);
    font-size: 11.5px;
    color: var(--muted);
}
.archive-bar .sort a {
    color: var(--muted);
}
.archive-bar .sort a.active {
    color: var(--text-deep);
    font-weight: 500;
}

.year-band {
    display: grid;
    grid-template-columns: 80px 1fr;
    gap: 24px;
    padding: 28px 0 8px;
    border-top: 1px solid var(--border);
    margin-top: 16px;
}
.year-band:first-of-type {
    border-top: none;
    margin-top: 0;
}
.year-label {
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 13px;
    color: var(--muted);
    letter-spacing: 0.04em;
    position: sticky;
    top: 84px;
    align-self: start;
}
.year-label .count {
    display: block;
    font-family: var(--font-mono);
    font-size: 11px;
    color: var(--muted-2);
    margin-top: 4px;
}

.post-row {
    display: grid;
    grid-template-columns: 96px minmax(0, 1fr) auto;
    gap: 20px;
    align-items: start;
    padding: 18px 0;
    border-bottom: 1px solid var(--border);
    cursor: pointer;
    transition: background var(--t-fast);
}
.post-row:last-child {
    border-bottom: none;
}
.post-row:hover {
    background: var(--muted-surface);
}
.post-row .date {
    font-family: var(--font-mono);
    font-size: 11.5px;
    color: var(--muted);
    padding-top: 4px;
    white-space: nowrap;
}
.post-row .date .day {
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 22px;
    color: var(--text-deep);
    line-height: 1;
    letter-spacing: -0.01em;
}
.post-row .date .month {
    display: block;
    font-family: var(--font-display);
    font-size: 10.5px;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--muted);
    margin-top: 4px;
}
.post-row .body {
    min-width: 0;
}
.post-row h3 {
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 18px;
    line-height: 1.3;
    letter-spacing: -0.005em;
    color: var(--text-deep);
    margin: 0 0 6px;
}
.post-row:hover h3 {
    color: var(--opteryx-teal);
}
.post-row .excerpt {
    font-size: 14px;
    color: var(--muted);
    line-height: 1.55;
    margin: 0 0 10px;
    display: -webkit-box;
    line-clamp: 2;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.post-row .meta-line {
    display: flex;
    align-items: center;
    gap: 12px;
    font-family: var(--font-mono);
    font-size: 11.5px;
    color: var(--muted-2);
}
.post-row .meta-line .author {
    color: var(--muted);
}
.post-row .meta-line .read {
    color: var(--muted-2);
}
.post-row .meta-line .tag {
    font-family: var(--font-display);
    font-weight: 500;
    font-size: 11px;
    letter-spacing: 0.04em;
    color: var(--opteryx-teal);
    padding: 1px 7px;
    border: 1px solid rgba(7, 121, 124, 0.25);
    border-radius: var(--r-pill);
    background: var(--accent-soft);
    text-transform: lowercase;
}
.post-row .meta-line .tag.orange {
    color: var(--opteryx-orange);
    border-color: rgba(254, 119, 1, 0.3);
    background: var(--orange-soft);
}
.post-row .arrow {
    align-self: center;
    font-family: var(--font-mono);
    font-size: 16px;
    color: var(--muted-2);
    transition:
        transform var(--t-fast),
        color var(--t-fast);
}
.post-row:hover .arrow {
    color: var(--opteryx-teal);
    transform: translateX(3px);
}

/* ============== Pagination footer ================================== */
.archive-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: 36px;
    padding-top: 22px;
    border-top: 1px solid var(--border);
    font-family: var(--font-display);
    font-size: 13px;
    color: var(--muted);
}
.archive-footer a {
    color: var(--text-deep);
    font-weight: 500;
}
.archive-footer a.disabled {
    color: var(--muted-2);
    pointer-events: none;
}

/* ===========================================================================
   Single Post page
   =========================================================================== */

.post-shell {
    display: grid;
    grid-template-columns: 220px minmax(0, 700px) 180px;
    gap: 48px;
    max-width: 1280px;
    margin: 0 auto;
    padding: 56px 28px 96px;
    align-items: start;
}
@media (max-width: 1240px) {
    .post-shell {
        grid-template-columns: 200px minmax(0, 1fr);
        gap: 40px;
    }
    .post-toc {
        display: none;
    }
}
@media (max-width: 760px) {
    .post-shell {
        grid-template-columns: 1fr;
        gap: 24px;
        padding: 32px 20px 64px;
    }
    .post-meta-rail {
        position: static;
        border-bottom: 1px solid var(--border);
        padding-bottom: 16px;
    }
}

/* Left meta rail */
.post-meta-rail {
    position: sticky;
    top: 84px;
    font-family: var(--font-display);
    font-size: 13px;
    color: var(--text);
    align-self: start;
}
.post-meta-rail .back-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-family: var(--font-display);
    font-weight: 500;
    font-size: 12.5px;
    color: var(--muted);
    margin-bottom: 28px;
    white-space: nowrap;
    width: max-content;
}
.post-meta-rail .back-link:hover {
    color: var(--opteryx-teal);
    text-decoration: none;
}
.meta-block {
    padding: 14px 0;
    border-top: 1px solid var(--border);
}
.meta-block:first-of-type {
    border-top: none;
    padding-top: 0;
}
.meta-block .label {
    font-family: var(--font-display);
    font-size: 10.5px;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--muted);
    margin-bottom: 8px;
}
.meta-block .value {
    font-size: 13px;
    color: var(--text-deep);
    line-height: 1.5;
}
.meta-block .value.mono {
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--text-deep);
}
.meta-block .value .small {
    display: block;
    color: var(--muted);
    font-size: 12px;
}
.meta-author {
    display: flex;
    align-items: center;
    gap: 10px;
}
.meta-author .author-avatar {
    width: 32px;
    height: 32px;
    font-size: 12px;
}
.meta-author .who {
    line-height: 1.3;
}
.meta-author .who .name {
    font-weight: 500;
    color: var(--text-deep);
}
.meta-author .who .role {
    font-size: 11.5px;
    color: var(--muted);
}

.tag-pills {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    max-width: 100%;
}
.tag-pills a {
    font-family: var(--font-display);
    font-weight: 500;
    font-size: 11px;
    letter-spacing: 0.04em;
    color: var(--opteryx-teal);
    padding: 2px 8px;
    border: 1px solid rgba(7, 121, 124, 0.25);
    border-radius: var(--r-pill);
    background: var(--accent-soft);
    text-decoration: none;
    text-transform: lowercase;
    white-space: nowrap;
}
.tag-pills a:hover {
    background: var(--opteryx-teal);
    color: #fff;
    border-color: var(--opteryx-teal);
    text-decoration: none;
}

.share-row {
    display: flex;
    gap: 8px;
}
.share-row button,
.share-row a.icon-btn {
    width: 30px;
    height: 30px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--r-m);
    color: var(--muted);
    font-family: var(--font-mono);
    font-size: 11px;
    cursor: pointer;
}
.share-row button:hover,
.share-row a.icon-btn:hover {
    color: var(--opteryx-teal);
    border-color: rgba(7, 121, 124, 0.3);
    background: var(--accent-soft);
}

/* ============== Post body ========================================= */
.post-body {
    min-width: 0;
}
.post-eyebrow {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
    margin-bottom: 14px;
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 11px;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--opteryx-orange);
}
.post-eyebrow .kind {
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 11px;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--opteryx-orange);
}
.post-eyebrow .dot {
    display: inline-block;
    width: 3px;
    height: 3px;
    border-radius: 50%;
    background: var(--muted-2);
}
.post-eyebrow .stamp {
    font-family: var(--font-mono);
    font-size: 11.5px;
    color: var(--muted);
}
.post-body h1.post-title {
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 44px;
    line-height: 1.1;
    letter-spacing: -0.015em;
    color: var(--text-deep);
    margin: 0 0 18px;
}
.post-lede {
    font-family: var(--font-body);
    font-weight: 400;
    font-size: 19px;
    line-height: 1.55;
    color: var(--text);
    margin: 0 0 36px;
    text-wrap: pretty;
}
.post-lede::first-letter {
    /* tiny editorial flourish — keep restrained */
    color: var(--opteryx-teal);
}

/* Cover */
.post-cover {
    margin: 0 0 40px;
    border: 1px solid var(--border);
    border-radius: var(--r-xl);
    overflow: hidden;
    aspect-ratio: 16 / 8;
    position: relative;
    background: linear-gradient(
        135deg,
        rgba(7, 121, 124, 0.1),
        rgba(31, 46, 97, 0.04) 70%
    );
    display: flex;
    align-items: center;
    justify-content: center;
}
.post-cover .stripes {
    position: absolute;
    inset: 0;
    background-image: repeating-linear-gradient(
        135deg,
        rgba(7, 121, 124, 0.07) 0 1px,
        transparent 1px 18px
    );
}
.post-cover .panel {
    position: relative;
    z-index: 1;
    background: rgba(255, 255, 255, 0.78);
    border: 1px solid var(--border);
    border-radius: var(--r-l);
    padding: 16px 20px;
    font-family: var(--font-mono);
    font-size: 12.5px;
    color: var(--text-deep);
    backdrop-filter: blur(4px);
    max-width: 82%;
    line-height: 1.6;
    box-shadow: var(--shadow-m);
}
.post-cover .panel .lbl {
    display: block;
    font-family: var(--font-display);
    font-size: 10.5px;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--muted);
    margin-bottom: 8px;
}
.post-cover .panel .ln {
    display: block;
}
.post-cover .panel .tok-kw {
    color: var(--opteryx-teal);
    font-weight: 600;
}
.post-cover .panel .tok-fn {
    color: var(--opteryx-navy);
    font-weight: 600;
}
.post-cover .panel .tok-str {
    color: var(--opteryx-orange);
}
.post-cover .panel .tok-com {
    color: var(--muted-2);
    font-style: italic;
}

/* ============== Prose ============================================ */
.prose {
    font-family: var(--font-body);
    font-size: 16px;
    line-height: 1.7;
    color: var(--text);
}
.prose p {
    margin: 0 0 18px;
    text-wrap: pretty;
}
.prose strong {
    color: var(--text-deep);
    font-weight: 500;
}
.prose a {
    color: var(--opteryx-teal);
    text-decoration: underline;
    text-decoration-color: rgba(7, 121, 124, 0.35);
    text-decoration-thickness: 1px;
    text-underline-offset: 3px;
}
.prose a:hover {
    text-decoration-color: var(--opteryx-teal);
}

.prose h2 {
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 24px;
    line-height: 1.25;
    letter-spacing: -0.01em;
    color: var(--text-deep);
    margin: 44px 0 14px;
    scroll-margin-top: 80px;
    position: relative;
}
.prose h2::before {
    content: "";
    display: block;
    width: 24px;
    height: 2px;
    background: var(--opteryx-teal);
    margin-bottom: 14px;
    border-radius: 2px;
}
.prose h3 {
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 17px;
    line-height: 1.35;
    color: var(--text-deep);
    margin: 30px 0 8px;
    scroll-margin-top: 80px;
}
.prose ul,
.prose ol {
    margin: 0 0 20px;
    padding-left: 22px;
}
.prose ul li,
.prose ol li {
    padding: 3px 0;
}
.prose ul li::marker {
    color: var(--muted-2);
}
.prose ol li::marker {
    color: var(--muted);
    font-variant-numeric: tabular-nums;
}
.prose :not(pre) > code {
    font-family: var(--font-mono);
    font-size: 13.5px;
    background: var(--muted-surface);
    border: 1px solid var(--border);
    color: var(--text-deep);
    padding: 1px 5px;
    border-radius: var(--r-xs);
    white-space: nowrap;
}

.prose hr {
    border: none;
    border-top: 1px solid var(--border);
    margin: 32px 0;
}

/* Pull quote */
.pull {
    margin: 28px 0;
    padding: 6px 0 6px 24px;
    border-left: 2px solid var(--opteryx-teal);
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 22px;
    line-height: 1.35;
    letter-spacing: -0.005em;
    color: var(--text-deep);
}
.pull cite {
    display: block;
    margin-top: 10px;
    font-family: var(--font-display);
    font-style: normal;
    font-weight: 500;
    font-size: 12.5px;
    color: var(--muted);
    letter-spacing: 0.02em;
}
.pull cite::before {
    content: "— ";
}

/* Code block — same style family as docs kit */
.code-block {
    margin: 0 0 24px;
    border: 1px solid var(--border);
    border-radius: var(--r-m);
    overflow: hidden;
    background: var(--muted-surface);
}
.code-block-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: #fff;
    border-bottom: 1px solid var(--border);
    padding: 6px 10px 6px 14px;
    color: var(--muted);
    font-family: var(--font-display);
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.06em;
    text-transform: uppercase;
}
.code-block-header .copy-btn {
    font-family: var(--font-display);
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--opteryx-teal);
    background: transparent;
    border: none;
    padding: 2px 6px;
    border-radius: var(--r-xs);
    cursor: pointer;
}
.code-block-header .copy-btn:hover {
    background: var(--accent-soft);
}
.code-block pre {
    margin: 0;
    padding: 14px 16px;
    overflow-x: auto;
    font-family: var(--font-mono);
    font-size: 13px;
    color: var(--text-deep);
    line-height: 1.65;
}
.code-block .tok-kw {
    color: var(--opteryx-teal);
    font-weight: 600;
}
.code-block .tok-fn {
    color: var(--opteryx-navy);
    font-weight: 600;
}
.code-block .tok-str {
    color: var(--opteryx-orange);
}
.code-block .tok-num {
    color: var(--opteryx-navy);
}
.code-block .tok-com {
    color: var(--muted-2);
    font-style: italic;
}
.code-block .tok-pun {
    color: var(--muted);
}

/* Callout */
.callout {
    display: grid;
    grid-template-columns: 3px 1fr;
    gap: 14px;
    margin: 0 0 22px;
    padding: 0;
}
.callout::before {
    content: "";
    background: var(--callout-rule, var(--border-2));
    border-radius: 2px;
}
.callout-label {
    display: block;
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 11px;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--callout-label, var(--muted));
    margin-bottom: 6px;
}
.callout-body p {
    margin: 0 0 8px;
    font-size: 14.5px;
    line-height: 1.6;
}
.callout-body p:last-child {
    margin-bottom: 0;
}
.callout.info {
    --callout-rule: var(--opteryx-teal);
    --callout-label: var(--opteryx-teal);
}
.callout.note {
    --callout-rule: var(--opteryx-navy);
    --callout-label: var(--opteryx-navy);
}
.callout.tip {
    --callout-rule: var(--success);
    --callout-label: var(--success);
}

/* ============== Right TOC ========================================= */
.post-toc {
    position: sticky;
    top: 84px;
    align-self: start;
    max-height: calc(100vh - 100px);
    overflow-y: auto;
    padding-left: 12px;
}
.post-toc .toc-title {
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 11px;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--muted);
    padding: 0 12px 12px;
}
.post-toc nav {
    display: flex;
    flex-direction: column;
    border-left: 1px solid var(--border);
}
.toc-item {
    position: relative;
    padding: 5px 14px;
    font-size: 12.5px;
    color: var(--muted);
    text-decoration: none;
    margin-left: -1px;
    border-left: 2px solid transparent;
    line-height: 1.5;
}
.toc-item:hover {
    color: var(--text-deep);
    text-decoration: none;
}
.toc-item.active {
    color: var(--opteryx-teal);
    font-weight: 600;
    border-left-color: var(--opteryx-teal);
}
.toc-item.lvl3 {
    padding-left: 24px;
    font-size: 12px;
}

/* ============== Post footer ======================================= */
.post-footer {
    margin-top: 56px;
    padding-top: 24px;
    border-top: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    gap: 28px;
}
.post-author-card {
    display: grid;
    grid-template-columns: 56px 1fr;
    gap: 18px;
    padding: 22px;
    background: var(--muted-surface);
    border: 1px solid var(--border);
    border-radius: var(--r-xl);
}
.post-author-card .author-avatar {
    width: 56px;
    height: 56px;
    font-size: 20px;
}
.post-author-card .who .name {
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 16px;
    color: var(--text-deep);
}
.post-author-card .who .role {
    font-family: var(--font-display);
    font-size: 12.5px;
    color: var(--muted);
    margin-bottom: 8px;
}
.post-author-card .who .bio {
    font-size: 14px;
    line-height: 1.55;
    color: var(--text);
    margin: 0;
}
.post-author-card .who .links {
    margin-top: 10px;
    display: flex;
    gap: 14px;
    font-family: var(--font-mono);
    font-size: 12px;
    flex-wrap: wrap;
}
.post-author-card .who .links a {
    white-space: nowrap;
}

/* Related posts */
.related h4 {
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 11px;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--muted);
    margin: 0 0 14px;
}
.related-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
}
@media (max-width: 760px) {
    .related-grid {
        grid-template-columns: 1fr;
    }
}
.related-card {
    display: block;
    padding: 16px 18px;
    border: 1px solid var(--border);
    border-radius: var(--r-l);
    background: #fff;
    text-decoration: none;
    transition:
        border-color var(--t-fast),
        background var(--t-fast);
}
.related-card:hover {
    border-color: rgba(7, 121, 124, 0.3);
    background: var(--muted-surface);
    text-decoration: none;
}
.related-card .stamp {
    font-family: var(--font-mono);
    font-size: 11px;
    color: var(--muted);
    margin-bottom: 6px;
    display: flex;
    align-items: center;
    gap: 8px;
}
.related-card .stamp .tag-mini {
    font-family: var(--font-display);
    font-weight: 500;
    font-size: 10.5px;
    letter-spacing: 0.04em;
    color: var(--opteryx-teal);
    text-transform: lowercase;
    white-space: nowrap;
}
.related-card h5 {
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 15px;
    line-height: 1.35;
    color: var(--text-deep);
    margin: 0 0 4px;
}
.related-card .ex {
    font-size: 13px;
    color: var(--muted);
    line-height: 1.5;
    display: -webkit-box;
    line-clamp: 2;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    margin: 0;
}

/* ============== Footer ============================================ */
.blog-footer {
    border-top: 1px solid var(--border);
    background: #fff;
    padding: 36px 0 40px;
}
.blog-footer-inner {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 28px;
    display: grid;
    grid-template-columns: 1.3fr 1fr 1fr 1fr;
    gap: 36px;
}
.blog-footer h6 {
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 11px;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--muted);
    margin: 0 0 12px;
}
.blog-footer ul {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 8px;
}
.blog-footer ul a {
    color: var(--text-deep);
    font-size: 13.5px;
    font-family: var(--font-display);
}
.blog-footer ul a:hover {
    color: var(--opteryx-teal);
    text-decoration: none;
}
.blog-footer .brand-col p {
    font-size: 13px;
    color: var(--muted);
    line-height: 1.55;
    margin: 12px 0 0;
}
.blog-footer .legal {
    max-width: 1280px;
    margin: 28px auto 0;
    padding: 16px 28px 0;
    border-top: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-family: var(--font-mono);
    font-size: 11.5px;
    color: var(--muted-2);
}

@media (max-width: 960px) {
    .blog-header-inner {
        gap: 16px;
        padding: 0 20px;
    }

    .blog-search {
        width: 180px;
    }
}

@media (max-width: 760px) {
    .blog-header-inner {
        flex-wrap: wrap;
        height: auto;
        padding-top: 12px;
        padding-bottom: 12px;
    }

    .header-spacer {
        display: none;
    }

    .blog-search {
        order: 4;
        width: 100%;
    }

    .blog-footer-simple-inner {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
    }
}