/* Blog (2026-10-01, design "طراحی وبلاگ PDM"): list page + post page. Plain
   asset (no Vite build), linked only by the blog views. Colours come from the
   site's tokens, so the light and dark themes follow; the category colours
   are defined for both below. Logical properties throughout: the same rules
   serve RTL (fa, ar) and LTR (en, de, tr). */

:root {
    --bl-cover: #E9EFF9;
    --bl-raise: #EEF3FB;
    --cat-guides: #2D6CFF;  --cat-guides-fg: #1D4ED8;  --cat-guides-bg: rgba(45,108,255,.10);
    --cat-trouble: #E58A00; --cat-trouble-fg: #A45A00; --cat-trouble-bg: rgba(245,158,11,.14);
    --cat-iran: #0BA5BE;    --cat-iran-fg: #0E7490;    --cat-iran-bg: rgba(12,192,214,.12);
    --cat-news: #7C5CF0;    --cat-news-fg: #6D28D9;    --cat-news-bg: rgba(124,92,240,.12);
}
:root[data-theme="dark"] {
    --bl-cover: #0C1424;
    --bl-raise: #16233F;
    --cat-guides: #4F8BFF;  --cat-guides-fg: #8FB4FF;  --cat-guides-bg: rgba(79,139,255,.14);
    --cat-trouble: #F59E0B; --cat-trouble-fg: #FBBF4A; --cat-trouble-bg: rgba(245,158,11,.14);
    --cat-iran: #22D3EE;    --cat-iran-fg: #67E3F5;    --cat-iran-bg: rgba(34,211,238,.13);
    --cat-news: #A78BFA;    --cat-news-fg: #C4B5FD;    --cat-news-bg: rgba(167,139,250,.15);
}
.cat-guides          { --cat: var(--cat-guides);  --cat-fg: var(--cat-guides-fg);  --cat-bg: var(--cat-guides-bg); }
.cat-troubleshooting { --cat: var(--cat-trouble); --cat-fg: var(--cat-trouble-fg); --cat-bg: var(--cat-trouble-bg); }
.cat-iran-internet   { --cat: var(--cat-iran);    --cat-fg: var(--cat-iran-fg);    --cat-bg: var(--cat-iran-bg); }
.cat-news            { --cat: var(--cat-news);    --cat-fg: var(--cat-news-fg);    --cat-bg: var(--cat-news-bg); }

.blog-wrap { max-width: 1180px; margin: 0 auto; padding: 48px 24px 80px; box-sizing: border-box; }
.blog-cat {
    display: inline-flex; align-items: center; height: 26px; padding: 0 11px; margin: 0;
    border-radius: 999px; background: var(--cat-bg, var(--chip)); color: var(--cat-fg, var(--primary));
    font-size: 12.5px; font-weight: 800; white-space: nowrap;
}
.blog-meta-line { display: flex; flex-wrap: wrap; align-items: center; gap: 6px 10px; margin: 0; font-size: 13px; color: var(--muted); }

/* ---- list: intro -------------------------------------------------------- */
.blog-intro {
    display: flex; align-items: flex-end; justify-content: space-between; gap: 24px 32px; flex-wrap: wrap;
    padding-bottom: 26px; border-bottom: 1px solid var(--border);
}
.blog-intro-text { max-width: 640px; }
.blog-intro h1 { font-size: 38px; line-height: 1.4; font-weight: 800; margin: 4px 0 10px; overflow-wrap: anywhere; }
html[lang^="fa"] .blog-intro h1, html[lang="ar"] .blog-intro h1 { line-height: 1.55; }
.blog-intro-lead { font-size: 17px; line-height: 1.9; color: var(--muted); margin: 0; }
.blog-page-no { color: var(--muted); font-weight: 700; font-size: .6em; }
.blog-filters { display: flex; flex-wrap: wrap; gap: 8px; }
.blog-filters[hidden] { display: none; }
.blog-pill {
    height: 40px; padding: 0 16px; border-radius: 999px; border: 1px solid var(--border);
    background: var(--card); color: var(--fg); font: inherit; font-size: 14px; font-weight: 700; cursor: pointer;
    transition: border-color .15s ease, background .15s ease;
}
.blog-pill:hover { border-color: var(--primary); }
/* White on the brand blue is 3.2:1; this deeper blue is 4.8:1 (AA). */
.blog-pill[aria-pressed="true"] { background: #2F6BEA; border-color: #2F6BEA; color: #fff; }
.blog-pill:focus-visible { outline: 3px solid var(--ring); outline-offset: 2px; }

/* ---- list: covers (real image or the drawn stand-in) --------------------- */
.bc-cover { background: var(--bl-cover); display: flex; align-items: center; justify-content: center; overflow: hidden; }
.bc-cover img { width: 100%; height: 100%; object-fit: cover; display: block; }
.bc-win {
    width: 70%; background: var(--card); border: 1px solid var(--border); border-radius: 10px; overflow: hidden;
    box-shadow: 0 18px 36px -14px rgba(0,0,0,.45);
}
.bc-win-bar { display: flex; gap: 5px; padding: 8px 10px; border-bottom: 1px solid var(--border); }
.bc-win-bar span { width: 6px; height: 6px; border-radius: 50%; background: var(--track); }
.bc-win-body { padding: 12px; display: grid; gap: 9px; }
.bc-lane { height: 7px; border-radius: 4px; background: var(--track); }
.bc-lane i { display: block; height: 100%; border-radius: 4px; background: var(--cat, var(--primary)); }

/* ---- list: featured card ------------------------------------------------- */
.blog-item[hidden] { display: none; }
.blog-feature {
    position: relative; margin-top: 34px; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr));
    background: var(--card); border: 1px solid var(--border); border-radius: 22px; overflow: hidden;
    transition: border-color .18s ease, box-shadow .18s ease;
}
.blog-feature:hover { border-color: var(--primary); box-shadow: var(--shadow); }
.blog-feature-media { position: relative; min-height: 320px; border-inline-end: 1px solid var(--border); display: flex; }
.blog-feature-media .bc-cover { flex: 1; }
.blog-feature-media .bc-win { width: 74%; }
.blog-feature-media .bc-lane { height: 9px; }
.blog-badge {
    position: absolute; z-index: 1; top: 16px; inset-inline-start: 16px; height: 28px; padding: 0 12px;
    display: inline-flex; align-items: center; border-radius: 999px; background: var(--fg); color: var(--bg);
    font-size: 12px; font-weight: 800;
}
.blog-feature-body { padding: 36px 36px 30px; display: flex; flex-direction: column; gap: 14px; }
.blog-feature-title { font-size: 27px; line-height: 1.55; font-weight: 800; margin: 0; }
.blog-feature-title a, .blog-card-title a { color: var(--fg); text-decoration: none; }
.blog-feature-title a:hover, .blog-card-title a:hover { color: var(--primary); }
.blog-feature-desc { font-size: 16px; line-height: 1.95; color: var(--muted); margin: 0; flex-grow: 1; }

.blog-more {
    display: inline-flex; align-items: center; gap: 7px; min-height: 44px; color: var(--primary);
    text-decoration: none; font-size: 14px; font-weight: 800; transition: gap .18s ease;
}
.blog-more:hover { gap: 11px; }
html[dir="ltr"] .blog-more svg { transform: scaleX(-1); }
.blog-more-btn { align-self: flex-start; padding: 0 18px; border-radius: 12px; background: var(--bl-raise); color: var(--fg); }

/* ---- list: grid ----------------------------------------------------------- */
.blog-grid-head { display: flex; align-items: baseline; justify-content: space-between; margin-top: 42px; }
.blog-grid-head[hidden] { display: none; }
.blog-grid-head h2 { font-size: 22px; font-weight: 800; margin: 0; }
.blog-grid-head span { font-size: 14px; color: var(--muted); }
.blog-grid { list-style: none; margin: 18px 0 0; padding: 0; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 22px; }
.blog-card {
    height: 100%; display: flex; flex-direction: column; background: var(--card); border: 1px solid var(--border);
    border-radius: 18px; overflow: hidden; transition: border-color .18s ease, transform .18s ease, box-shadow .18s ease;
}
.blog-card:hover { border-color: var(--primary); transform: translateY(-3px); box-shadow: var(--shadow); }
.blog-card .bc-cover { height: 176px; border-bottom: 1px solid var(--border); }
.blog-card-body { padding: 18px 20px 6px; display: flex; flex-direction: column; gap: 10px; flex-grow: 1; }
.blog-card-title { font-size: 18.5px; line-height: 1.65; font-weight: 800; margin: 0; }
.blog-card-desc {
    font-size: 14.5px; line-height: 1.9; color: var(--muted); margin: 0; flex-grow: 1;
    display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden;
}
.blog-card-foot { display: flex; align-items: center; justify-content: space-between; border-top: 1px solid var(--border); margin-top: 4px; font-size: 12.5px; color: var(--muted); }

.blog-pager { display: flex; justify-content: center; align-items: center; gap: 8px; margin-top: 40px; flex-wrap: wrap; }
.blog-pager-num, .blog-pager-step {
    min-width: 44px; height: 44px; padding: 0 14px; box-sizing: border-box; border-radius: 12px;
    display: inline-flex; align-items: center; justify-content: center; border: 1px solid var(--border);
    background: var(--card); color: var(--fg); font-weight: 800; font-size: 14px; text-decoration: none;
}
.blog-pager-num.is-on { background: #2F6BEA; border-color: #2F6BEA; color: #fff; }
.blog-pager a:hover { border-color: var(--primary); }

/* ---- post ---------------------------------------------------------------- */
.blog-preview { background: #b45309; color: #fff; text-align: center; font-weight: 700; padding: 10px 16px; font-size: 14px; }
.blog-progress { position: fixed; z-index: 60; top: 0; inset-inline: 0; height: 3px; pointer-events: none; }
.blog-progress i { display: block; height: 100%; background: var(--primary); transform: scaleX(0); transform-origin: left; }
html[dir="rtl"] .blog-progress i { transform-origin: right; }
.blog-wrap-post { padding-top: 26px; }
.blog-crumbs ol { list-style: none; margin: 0 0 22px; padding: 0; display: flex; flex-wrap: wrap; gap: 4px 6px; font-size: 13px; color: var(--muted); }
.blog-crumbs li { display: flex; align-items: center; gap: 6px; min-width: 0; }
.blog-crumbs li + li::before { content: '›'; opacity: .6; }
html[dir="rtl"] .blog-crumbs li + li::before { content: '‹'; }
.blog-crumbs a { color: var(--muted); text-decoration: none; }
.blog-crumbs a:hover { color: var(--primary); }
.blog-crumbs [aria-current] { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; max-width: 46ch; color: var(--fg); }

/* One column without a table of contents; with one, the post sits beside a
   sticky side panel on wide screens. */
.blog-post { max-width: 760px; margin: 0 auto; }
.blog-post.has-toc { max-width: none; display: grid; grid-template-columns: minmax(0, 1fr) 300px; column-gap: 56px; align-items: start; }
.blog-post.has-toc > * { grid-column: 1; min-width: 0; }
.blog-post.has-toc > .blog-side { grid-column: 2; grid-row: 1 / span 6; position: sticky; top: 92px; display: grid; gap: 16px; }

.blog-head .blog-cat { margin-bottom: 14px; }
.blog-head h1 { font-size: 36px; font-weight: 800; line-height: 1.45; letter-spacing: -.3px; margin: 0; overflow-wrap: anywhere; }
html[lang^="fa"] .blog-head h1, html[lang="ar"] .blog-head h1 { letter-spacing: 0; line-height: 1.6; }
.blog-lead { font-size: 18px; line-height: 1.95; color: var(--muted); margin: 14px 0 0; }
.blog-byline {
    display: flex; align-items: center; flex-wrap: wrap; gap: 10px 12px; margin-top: 22px; padding: 14px 0;
    border-block: 1px solid var(--border);
}
.blog-meta { margin: 0; display: flex; flex-wrap: wrap; gap: 4px 18px; font-size: 13.5px; color: var(--muted); }

.blog-cover { margin: 28px 0 0; }
.blog-cover img, .blog-body img { display: block; max-width: 100%; height: auto; border-radius: 16px; border: 1px solid var(--border); }

/* table of contents */
.blog-toc { background: var(--card); border: 1px solid var(--border); border-radius: 18px; }
.blog-toc summary {
    list-style: none; display: flex; align-items: center; gap: 9px; min-height: 54px; padding: 0 18px;
    color: var(--primary); cursor: pointer;
}
.blog-toc summary::-webkit-details-marker { display: none; }
.blog-toc-title { color: var(--fg); font-size: 15px; font-weight: 800; }
.blog-toc-count { margin-inline-start: auto; font-size: 12.5px; color: var(--muted); }
.blog-toc-chev { color: var(--muted); transition: transform .2s ease; }
.blog-toc:not([open]) .blog-toc-chev { transform: rotate(180deg); }
.blog-toc-progress { height: 4px; margin: 0 18px 8px; border-radius: 4px; background: var(--track); overflow: hidden; }
.blog-toc-progress i { display: block; height: 100%; background: var(--primary); transform: scaleX(0); transform-origin: left; transition: transform .25s ease; }
html[dir="rtl"] .blog-toc-progress i { transform-origin: right; }
.blog-toc ol { list-style: none; margin: 0; padding: 0 8px 10px; display: grid; gap: 2px; }
.blog-toc a {
    display: flex; align-items: flex-start; gap: 11px; padding: 9px 10px; border-radius: 10px;
    color: var(--fg); opacity: .86; text-decoration: none; font-size: 14px; line-height: 1.7;
}
.blog-toc a:hover { background: var(--bl-raise); opacity: 1; }
.blog-toc-num {
    flex-shrink: 0; width: 24px; height: 24px; margin-top: 1px; box-sizing: border-box; border-radius: 7px;
    border: 1px solid var(--border); color: var(--muted); display: inline-flex; align-items: center; justify-content: center;
    font-size: 12.5px; font-weight: 800;
}
.blog-toc-num b { font-weight: 800; }
.blog-toc-num svg { display: none; }
.blog-toc a.is-done { opacity: .7; }
.blog-toc a.is-done .blog-toc-num { border-color: transparent; background: var(--bl-raise); color: var(--primary); }
.blog-toc a.is-done .blog-toc-num b { display: none; }
.blog-toc a.is-done .blog-toc-num svg { display: block; }
.blog-toc a.is-on { background: var(--bl-raise); opacity: 1; font-weight: 700; }
.blog-toc a.is-on .blog-toc-num { border-color: #2F6BEA; background: #2F6BEA; color: #fff; }

.blog-side-cta { background: var(--card); border: 1px solid var(--border); border-radius: 18px; padding: 20px; }
.blog-side-cta p { margin: 0 0 12px; font-size: 13.5px; line-height: 1.85; color: var(--muted); }
.blog-side-cta .blog-side-cta-title { margin-bottom: 6px; font-size: 15px; font-weight: 800; color: var(--fg); }
.blog-side-cta .btn { min-height: 44px; }

/* Long-form reading: ~70 characters a line, generous leading (more for
   Arabic script, whose ascenders and dots need it). */
.blog-body { margin-top: 30px; font-size: 17px; line-height: 1.85; color: var(--fg); overflow-wrap: break-word; }
html[lang^="fa"] .blog-body, html[lang="ar"] .blog-body { line-height: 2.05; }
.blog-body > * + * { margin-top: 1.1em; }
.blog-body h2 { font-size: 26px; font-weight: 800; line-height: 1.5; margin-top: 1.9em; scroll-margin-top: 96px; }
.blog-body h3 { font-size: 21px; font-weight: 800; line-height: 1.55; margin-top: 1.6em; scroll-margin-top: 96px; }
.blog-body h4 { font-size: 18px; font-weight: 800; margin-top: 1.4em; }
/* Underlined, not colour alone: a link must stand out from the text for
   readers who cannot tell the colours apart (Lighthouse link-in-text-block). */
.blog-body a { color: var(--primary); text-decoration: underline; text-decoration-thickness: 1px; text-underline-offset: 4px; }
.blog-body a:hover { text-decoration-thickness: 2px; }
.blog-body ul, .blog-body ol { padding-inline-start: 1.4em; }
.blog-body li + li { margin-top: .35em; }
/* Numbered lists count in the page's own digits. */
html[lang^="fa"] .blog-body ol { list-style-type: persian; }
html[lang="ar"] .blog-body ol { list-style-type: arabic-indic; }
.blog-body blockquote {
    margin-inline: 0; padding: 14px 18px; background: var(--chip); border-radius: 14px; color: var(--fg);
}
.blog-body hr { border: 0; border-top: 1px solid var(--border); margin-block: 2em; }
/* Commands and paths are left-to-right even inside a Persian sentence. */
.blog-body code {
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: .88em;
    background: var(--track); border-radius: 6px; padding: .12em .4em; direction: ltr; unicode-bidi: isolate;
}
.blog-body pre {
    direction: ltr; text-align: left; background: #0b1220; color: #e6edf7; border-radius: 14px;
    padding: 16px 18px; overflow-x: auto; line-height: 1.6; font-size: 14px;
}
.blog-body pre code { background: none; padding: 0; color: inherit; font-size: inherit; }
.blog-table { overflow-x: auto; border: 1px solid var(--border); border-radius: 12px; }
.blog-body table { width: 100%; border-collapse: collapse; font-size: 15px; line-height: 1.7; }
.blog-body th, .blog-body td { padding: 10px 14px; border-bottom: 1px solid var(--border); text-align: start; vertical-align: top; }
.blog-body th { background: var(--chip); font-weight: 800; }
.blog-body tr:last-child td { border-bottom: 0; }

.blog-cta { display: flex; align-items: center; justify-content: space-between; gap: 18px; margin-top: 44px; flex-wrap: wrap; }
.blog-cta-title { font-size: 19px; font-weight: 800; margin: 0 0 4px; }
.blog-cta-text { color: var(--muted); line-height: 1.7; margin: 0; }
.blog-cta .btn { min-height: 44px; white-space: nowrap; }
.blog-related { margin-top: 40px; }
.blog-related h2 { font-size: 22px; font-weight: 800; margin: 0 0 12px; }
.blog-related ul { margin: 0; padding-inline-start: 1.2em; display: grid; gap: 8px; }
.blog-related a { color: var(--primary); line-height: 1.7; }

/* ---- narrower screens ------------------------------------------------------ */
@media (max-width: 1023px) {
    .blog-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .blog-post.has-toc { display: block; max-width: 760px; margin: 0 auto; }
    .blog-post.has-toc > .blog-side { position: static; margin-top: 24px; }
    .blog-side-cta { display: none; }
}
@media (max-width: 760px) {
    .blog-wrap { padding: 28px 16px 64px; }
    .blog-intro h1 { font-size: 27px; }
    .blog-intro-lead { font-size: 15.5px; }
    .blog-filters { flex-wrap: nowrap; overflow-x: auto; margin-inline: -16px; padding-inline: 16px; scrollbar-width: none; }
    .blog-pill { flex-shrink: 0; }
    .blog-feature { grid-template-columns: minmax(0, 1fr); }
    .blog-feature-media { min-height: 190px; border-inline-end: 0; border-bottom: 1px solid var(--border); }
    .blog-feature-body { padding: 20px 20px 18px; gap: 11px; }
    .blog-feature-title { font-size: 20px; }
    .blog-feature-desc { font-size: 15px; }
    .blog-grid { grid-template-columns: minmax(0, 1fr); gap: 16px; }
    .blog-head h1 { font-size: 26px; }
    .blog-lead { font-size: 16px; }
    .blog-body { font-size: 16px; }
    .blog-body h2 { font-size: 22px; }
    .blog-body h3 { font-size: 19px; }
    .blog-cta .btn { width: 100%; justify-content: center; }
}
@media (prefers-reduced-motion: reduce) {
    .blog-card, .blog-feature, .blog-more, .blog-toc-progress i, .blog-toc-chev { transition: none; }
    .blog-card:hover { transform: none; }
}
@media print { .blog-cta, .blog-related, .blog-crumbs, .blog-preview, .blog-side, .blog-progress { display: none; } }