/* ====================================================================
   blog.css - Resend-style blog index + article reading layout
   Used by /blog and /blog/* posts. Pairs with site.css.
==================================================================== */

:root {
    --bl-head: rgba(255, 255, 255, .96);
    --bl-text: rgba(255, 255, 255, .68);
    --bl-muted: rgba(255, 255, 255, .42);
    --bl-faint: rgba(255, 255, 255, .25);
    --bl-line: rgba(255, 255, 255, .07);
    --bl-line-strong: rgba(255, 255, 255, .12);
    --bl-accent: #a680ff;
}

/* HERO ---------------------------------------------------------------- */
.bl-hero {
    max-width: 1200px;
    margin: 0 auto;
    padding: 96px 40px 28px;
    position: relative;
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 40px;
    flex-wrap: wrap;
}
.bl-hero::before {
    content: '';
    position: absolute;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    width: 820px;
    height: 360px;
    background: radial-gradient(ellipse, rgba(108, 99, 255, .12) 0%, transparent 65%);
    pointer-events: none;
}
.bl-hero > * { position: relative; z-index: 1; }
.bl-hero-title {
    font-size: clamp(56px, 8vw, 112px);
    font-weight: 800;
    letter-spacing: -3.5px;
    line-height: .9;
    color: var(--bl-head);
    margin: 0;
    font-family: 'Times New Roman', Times, ui-serif, Georgia, Cambria, serif;
    font-style: italic;
}
.bl-hero-actions {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-shrink: 0;
}
.bl-search {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(255, 255, 255, .04);
    border: 1px solid var(--bl-line);
    border-radius: 100px;
    padding: 8px 16px;
    color: var(--bl-muted);
    font-size: 13px;
    min-width: 220px;
    cursor: text;
}
.bl-search svg { flex-shrink: 0; opacity: .55; }
.bl-search input {
    background: none;
    border: none;
    color: var(--bl-head);
    font: inherit;
    flex: 1;
    outline: none;
    min-width: 0;
}
.bl-search input::placeholder { color: var(--bl-muted); }
.bl-search-kbd {
    display: inline-flex;
    align-items: center;
    gap: 3px;
    font-size: 11px;
    color: var(--bl-muted);
    padding: 2px 6px;
    background: rgba(255, 255, 255, .05);
    border: 1px solid var(--bl-line);
    border-radius: 6px;
    flex-shrink: 0;
}
.bl-subscribe {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(255, 255, 255, .04);
    border: 1px solid var(--bl-line);
    border-radius: 100px;
    padding: 9px 18px;
    color: var(--bl-text);
    font-size: 13px;
    font-weight: 500;
    text-decoration: none;
    transition: background .2s, color .2s, border-color .2s;
}
.bl-subscribe:hover {
    color: var(--bl-head);
    background: rgba(255, 255, 255, .07);
    border-color: var(--bl-line-strong);
}

/* FILTER pills -------------------------------------------------------- */
.bl-filter-wrap {
    max-width: 1200px;
    margin: 28px auto 56px;
    padding: 0 40px;
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}
.bl-filter-btn {
    background: rgba(255, 255, 255, .04);
    border: 1px solid var(--bl-line);
    cursor: pointer;
    font-size: 13px;
    font-weight: 500;
    color: var(--bl-muted);
    padding: 8px 18px;
    border-radius: 100px;
    transition: background .2s, color .2s, border-color .2s;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
}
.bl-filter-btn:hover {
    color: var(--bl-head);
    border-color: var(--bl-line-strong);
}
.bl-filter-btn.active {
    color: #0b0918;
    background: rgba(255, 255, 255, .92);
    border-color: rgba(255, 255, 255, .92);
}

/* FEATURED row (2 cards side by side) --------------------------------- */
.bl-featured {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 40px;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}
.bl-featured .bl-card-cover {
    aspect-ratio: 4 / 3;
}
.bl-featured .bl-card-title {
    font-size: 22px;
}

/* LATEST POSTS section ------------------------------------------------ */
.bl-section {
    max-width: 1200px;
    margin: 96px auto 0;
    padding: 0 40px 120px;
}
.bl-section-head {
    font-size: 14px;
    color: var(--bl-muted);
    letter-spacing: .02em;
    margin-bottom: 28px;
    font-weight: 500;
}
.bl-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px 28px;
}

/* CARD ---------------------------------------------------------------- */
.bl-card,
.bl-card:visited {
    display: flex;
    flex-direction: column;
    text-decoration: none;
    color: var(--bl-text);
    gap: 16px;
}
.bl-card-cover {
    aspect-ratio: 3 / 2;
    width: 100%;
    border-radius: 16px;
    overflow: hidden;
    background: rgba(255, 255, 255, .04);
    border: 1px solid var(--bl-line);
    position: relative;
}
.bl-card-cover img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: transform .5s cubic-bezier(.2,.7,.2,1);
}
.bl-card:hover .bl-card-cover img { transform: scale(1.03); }
.bl-card-tag {
    position: absolute;
    top: 14px;
    left: 14px;
    display: inline-block;
    padding: 5px 12px;
    background: rgba(11, 9, 24, .68);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, .12);
    border-radius: 100px;
    color: var(--bl-head);
    font-size: 11px;
    font-weight: 600;
    letter-spacing: .04em;
}
.bl-card-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--bl-head) !important;
    line-height: 1.3;
    letter-spacing: -.01em;
    margin: 0;
    transition: color .2s;
}
.bl-card:hover .bl-card-title { color: var(--bl-accent) !important; }
.bl-card-meta {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 13px;
    color: var(--bl-muted);
    margin-top: 2px;
}
.bl-card-author-dot {
    width: 22px;
    height: 22px;
    border-radius: 50%;
    background: rgba(255, 255, 255, .06);
    border: 1px solid var(--bl-line);
    padding: 3px;
    object-fit: contain;
    display: inline-block;
    flex-shrink: 0;
}
.bl-card-sep {
    color: var(--bl-faint);
}

/* ARTICLE reading layout --------------------------------------------- */
.bl-article {
    max-width: 760px;
    margin: 0 auto;
    padding: 64px 24px 24px;
}
.bl-article-back {
    display: flex;
    align-items: center;
    gap: 8px;
    width: fit-content;
    color: var(--bl-muted);
    font-size: 13px;
    text-decoration: none;
    margin-bottom: 18px;
    transition: color .2s;
}
.bl-article-back:hover { color: var(--bl-head); }
.bl-article-tag {
    display: inline-flex;
    align-items: center;
    width: fit-content;
    padding: 6px 14px;
    background: rgba(255, 255, 255, .04);
    border: 1px solid var(--bl-line);
    border-radius: 100px;
    color: var(--bl-text);
    font-size: 12px;
    font-weight: 500;
    letter-spacing: .02em;
    text-transform: none;
    margin: 0 0 26px;
    transition: background .2s, border-color .2s, color .2s;
}
.bl-article-tag:hover {
    background: rgba(255, 255, 255, .07);
    border-color: var(--bl-line-strong);
    color: var(--bl-head);
}
.bl-article-title {
    font-size: clamp(36px, 5.2vw, 60px);
    font-weight: 800;
    line-height: 1.05;
    letter-spacing: -2px;
    color: var(--bl-head);
    margin: 0 0 28px;
    font-family: 'Times New Roman', Times, ui-serif, Georgia, Cambria, serif;
    font-style: italic;
}
.bl-article-meta {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-bottom: 48px;
    font-size: 14px;
    color: var(--bl-muted);
}
.bl-article-author {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    color: var(--bl-text);
    text-decoration: none;
    font-weight: 500;
}
.bl-article-author img {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    object-fit: cover;
    background: rgba(255, 255, 255, .06);
    border: 1px solid var(--bl-line);
}
.bl-article-cover {
    width: 100%;
    aspect-ratio: 16 / 9;
    border-radius: 20px;
    overflow: hidden;
    margin-bottom: 56px;
    border: 1px solid var(--bl-line);
}
.bl-article-cover img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

/* PROSE -------------------------------------------------------------- */
.bl-prose {
    color: var(--bl-text);
    font-size: 17px;
    line-height: 1.75;
    letter-spacing: .003em;
    padding-bottom: 96px;
}
.bl-prose > * + * { margin-top: 1.4em; }
.bl-prose h2 {
    font-size: 28px;
    font-weight: 700;
    line-height: 1.25;
    letter-spacing: -.5px;
    color: var(--bl-head);
    margin-top: 2.2em;
    margin-bottom: .4em;
}
.bl-prose h2:first-child { margin-top: 0; }
.bl-prose h3 {
    font-size: 21px;
    font-weight: 700;
    line-height: 1.3;
    letter-spacing: -.3px;
    color: var(--bl-head);
    margin-top: 1.8em;
    margin-bottom: .3em;
}
.bl-prose p { margin: 0; }
.bl-prose a {
    color: var(--bl-accent);
    text-decoration: underline;
    text-decoration-color: rgba(166, 128, 255, .35);
    text-underline-offset: 3px;
    transition: text-decoration-color .2s;
}
.bl-prose a:hover { text-decoration-color: var(--bl-accent); }
.bl-prose strong { color: var(--bl-head); font-weight: 600; }
.bl-prose ul, .bl-prose ol {
    padding-left: 24px;
}
.bl-prose ul li, .bl-prose ol li {
    margin: 0.5em 0;
}
.bl-prose ul li::marker { color: var(--bl-accent); }
.bl-prose ol li::marker { color: var(--bl-accent); font-weight: 700; }
.bl-prose blockquote {
    border-left: 3px solid var(--bl-accent);
    padding: 4px 0 4px 20px;
    color: var(--bl-head);
    font-style: italic;
    font-size: 19px;
    line-height: 1.6;
    margin: 1.6em 0;
}
.bl-prose code {
    background: rgba(166, 128, 255, .08);
    border: 1px solid rgba(166, 128, 255, .18);
    border-radius: 6px;
    padding: 2px 7px;
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
    font-size: 14px;
    color: var(--bl-head);
}
.bl-prose img {
    width: 100%;
    border-radius: 16px;
    border: 1px solid var(--bl-line);
    margin: 1.6em 0;
}
.bl-prose hr {
    border: none;
    border-top: 1px solid var(--bl-line);
    margin: 2.4em 0;
}
.bl-prose .bl-callout {
    background: rgba(166, 128, 255, .05);
    border: 1px solid rgba(166, 128, 255, .18);
    border-left: 3px solid var(--bl-accent);
    border-radius: 16px;
    padding: 20px 24px;
    margin: 1.6em 0;
    color: var(--bl-text);
}
.bl-prose .bl-callout strong { color: var(--bl-accent); }
.bl-prose .bl-callout p { margin: 0; }

/* In-article stat row */
.bl-prose .bl-stat-row {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 14px;
    margin: 1.8em 0;
}
.bl-prose .bl-stat-card {
    padding: 22px 18px;
    border-radius: 14px;
    border: 1px solid var(--bl-line);
    background: rgba(255, 255, 255, .02);
    text-align: center;
}
.bl-prose .bl-stat-val {
    font-size: 26px;
    font-weight: 800;
    color: var(--bl-accent);
    letter-spacing: -.02em;
    margin-bottom: 6px;
    line-height: 1;
}
.bl-prose .bl-stat-label {
    font-size: 12px;
    color: var(--bl-muted);
    line-height: 1.45;
    letter-spacing: .02em;
}

/* In-article numbered step card */
.bl-prose .bl-step {
    display: flex;
    gap: 16px;
    align-items: flex-start;
    padding: 20px;
    border-radius: 14px;
    border: 1px solid var(--bl-line);
    margin: 12px 0;
    transition: border-color .2s;
}
.bl-prose .bl-step:hover { border-color: rgba(166, 128, 255, .25); }
.bl-prose .bl-step-num {
    width: 36px;
    height: 36px;
    border-radius: 10px;
    flex-shrink: 0;
    background: linear-gradient(135deg, rgba(166, 128, 255, .18), rgba(98, 1, 255, .1));
    border: 1px solid rgba(166, 128, 255, .25);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    font-weight: 800;
    color: var(--bl-accent);
}
.bl-prose .bl-step-body h4 {
    font-size: 15px;
    font-weight: 700;
    color: var(--bl-head);
    margin: 0 0 4px;
}
.bl-prose .bl-step-body p {
    font-size: 14px;
    color: var(--bl-muted);
    line-height: 1.7;
    margin: 0;
}
.bl-prose .bl-step-body .bl-step-img {
    margin-top: 14px;
    border-radius: 12px;
    overflow: hidden;
    border: 1px solid var(--bl-line);
    background: rgba(255, 255, 255, .02);
    cursor: zoom-in;
    position: relative;
}
.bl-prose .bl-step-body .bl-step-img img {
    width: 100%;
    height: auto;
    display: block;
    margin: 0;
    border: none;
    border-radius: 0;
    transition: transform .4s cubic-bezier(.2,.7,.2,1);
}
.bl-prose .bl-step-body .bl-step-img:hover img {
    transform: scale(1.015);
}
.bl-prose .bl-step-body .bl-step-img::after {
    content: '';
    position: absolute;
    top: 10px;
    right: 10px;
    width: 30px;
    height: 30px;
    border-radius: 8px;
    background: rgba(11, 9, 24, .7) url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%23ffffff' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'><circle cx='11' cy='11' r='8'/><path d='m21 21-4.3-4.3'/><line x1='11' y1='8' x2='11' y2='14'/><line x1='8' y1='11' x2='14' y2='11'/></svg>") center / 16px no-repeat;
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border: 1px solid rgba(255, 255, 255, .12);
    opacity: 0;
    transition: opacity .2s;
    pointer-events: none;
}
.bl-prose .bl-step-body .bl-step-img:hover::after { opacity: 1; }

/* ──────────────────────────────────────────────────────────────────
   LIGHTBOX — full-screen image viewer
   Toggled by site.js for any .bl-step-img element.
   ─────────────────────────────────────────────────────────────── */
.bl-lightbox {
    position: fixed;
    inset: 0;
    z-index: 10000;
    background: rgba(8, 6, 18, .92);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    display: none;
    align-items: center;
    justify-content: center;
    padding: 48px 24px;
    cursor: zoom-out;
    opacity: 0;
    transition: opacity .2s;
}
.bl-lightbox.open {
    display: flex;
    opacity: 1;
}
.bl-lightbox img {
    max-width: min(1400px, 100%);
    max-height: 100%;
    border-radius: 14px;
    box-shadow: 0 24px 80px rgba(0, 0, 0, .5);
    border: 1px solid var(--bl-line-strong);
    transform: scale(.96);
    transition: transform .25s cubic-bezier(.2,.7,.2,1);
}
.bl-lightbox.open img { transform: scale(1); }
.bl-lightbox-close {
    position: fixed;
    top: 20px;
    right: 20px;
    width: 40px;
    height: 40px;
    border-radius: 10px;
    background: rgba(255, 255, 255, .08);
    border: 1px solid var(--bl-line-strong);
    color: var(--bl-head);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: background .2s, transform .15s;
}
.bl-lightbox-close:hover { background: rgba(255, 255, 255, .14); }
.bl-lightbox-close:active { transform: scale(.94); }
body.bl-lightbox-open { overflow: hidden; }

/* In-article CTA */
.bl-prose .bl-inline-cta {
    margin: 2em 0;
    padding: 32px 28px;
    border-radius: 18px;
    background: linear-gradient(135deg, rgba(98, 1, 255, .08) 0%, rgba(12, 10, 28, .8) 100%);
    border: 1px solid rgba(166, 128, 255, .2);
    text-align: center;
    position: relative;
    overflow: hidden;
}
.bl-prose .bl-inline-cta::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(166, 128, 255, .5), transparent);
}
.bl-prose .bl-inline-cta h3 {
    font-size: 20px;
    font-weight: 700;
    color: var(--bl-head);
    margin: 0 0 8px;
}
.bl-prose .bl-inline-cta p {
    font-size: 14px;
    color: var(--bl-muted);
    margin: 0 0 20px;
    line-height: 1.7;
}
.bl-prose .bl-inline-cta-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    background: linear-gradient(135deg, rgba(166, 128, 255, .95), rgba(98, 1, 255, .9));
    border: 1px solid rgba(166, 128, 255, .5);
    border-radius: 12px;
    font-size: 14px;
    color: #fff;
    font-weight: 600;
    letter-spacing: .04em;
    text-decoration: none;
    transition: opacity .2s, transform .2s;
    box-shadow: 0 6px 24px rgba(98, 1, 255, .35);
}
.bl-prose .bl-inline-cta-btn:hover { opacity: .9; transform: translateY(-1px); color: #fff; }

/* Related grid in article footer */
.bl-related-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 18px;
}
.bl-related-card {
    padding: 22px;
    border-radius: 16px;
    border: 1px solid var(--bl-line);
    text-decoration: none;
    transition: border-color .2s, transform .2s;
    display: block;
    color: var(--bl-text);
}
.bl-related-card:hover {
    border-color: rgba(166, 128, 255, .25);
    transform: translateY(-2px);
}
.bl-related-tag {
    font-size: 11px;
    font-weight: 700;
    color: var(--bl-accent);
    letter-spacing: .12em;
    text-transform: uppercase;
    margin: 0 0 8px;
}
.bl-related-title {
    font-size: 14px;
    font-weight: 600;
    color: var(--bl-head);
    line-height: 1.4;
    margin: 0;
}

/* ARTICLE FOOTER ----------------------------------------------------- */
.bl-article-footer {
    max-width: 760px;
    margin: 0 auto;
    padding: 48px 24px 24px;
    border-top: 1px solid var(--bl-line);
}
.bl-related {
    max-width: 1100px;
    margin: 0 auto;
    padding: 64px 40px 120px;
}
.bl-related-head {
    font-size: 14px;
    color: var(--bl-muted);
    margin-bottom: 24px;
    font-weight: 500;
}

/* RESPONSIVE --------------------------------------------------------- */
@media (max-width: 900px) {
    .bl-hero { padding: 72px 28px 20px; gap: 24px; }
    .bl-search { min-width: 0; }
    .bl-filter-wrap { padding: 0 28px; margin: 20px auto 36px; overflow-x: auto; flex-wrap: nowrap; -webkit-overflow-scrolling: touch; }
    .bl-filter-btn { flex-shrink: 0; }
    .bl-featured { grid-template-columns: 1fr; padding: 0 28px; }
    .bl-section { margin-top: 64px; padding: 0 28px 80px; }
    .bl-grid { grid-template-columns: 1fr; gap: 36px; }
    .bl-article { padding: 40px 24px 16px; }
    .bl-article-cover { margin-bottom: 32px; aspect-ratio: 16 / 10; }
    .bl-prose { font-size: 16px; }
    .bl-prose h2 { font-size: 24px; }
    .bl-related { padding: 48px 28px 80px; }
    .bl-prose .bl-stat-row { grid-template-columns: 1fr; gap: 10px; }
    .bl-related-grid { grid-template-columns: 1fr; }
}
@media (min-width: 901px) and (max-width: 1180px) {
    .bl-featured .bl-card-title { font-size: 20px; }
}