/* ═══════════════════════════════════════════════════════════════════════
   Article page (v10) — loaded on ?page=post and ?page=blog only.
   Colour carries meaning here: each step of a guide gets its own colour
   and keeps it everywhere (badge, heading, tint, the line to the next).
   Motion: ease-out, short, and off for prefers-reduced-motion.
   ═══════════════════════════════════════════════════════════════════════ */
.pa{--pa-c1:#0E9F8B;--pa-c2:#2F6FE0;--pa-c3:#E07B00;--pa-c4:#D63C6B;--pa-c5:#7A4FD8;--pa-c6:#3C9A23;
  --pa-ease:cubic-bezier(.22,1,.36,1)}
[data-theme="dark"] .pa{--pa-c1:#2CC9B0;--pa-c2:#5E95F5;--pa-c3:#F0A830;--pa-c4:#F0679A;--pa-c5:#A88BF5;--pa-c6:#7BC94F}

/* reading progress */
.pa-progress{position:fixed;top:0;inset-inline:0;height:3px;z-index:9998;pointer-events:none}
.pa-progress i{display:block;height:100%;width:100%;transform:scaleX(0);transform-origin:left;
  background:linear-gradient(90deg,var(--cyan),color-mix(in srgb,var(--cyan) 55%,#fff))}
[dir="rtl"] .pa-progress i{transform-origin:right}
.pa-progress ~ * .mo-prog,body:has(.pa-progress) .mo-prog{display:none}

/* ── head ─────────────────────────────────────────────────────────── */
.pa-head{max-width:880px;margin:10px 0 22px}
.pa-cat{display:inline-flex;align-items:center;gap:7px;padding:5px 12px;border-radius:99px;font-size:12.5px;font-weight:700;text-decoration:none;
  color:var(--c);background:color-mix(in srgb,var(--c) 13%,transparent);border:1px solid color-mix(in srgb,var(--c) 28%,transparent);
  transition:background .2s,transform .2s var(--pa-ease)}
.pa-cat:hover{background:color-mix(in srgb,var(--c) 20%,transparent);transform:translateY(-1px)}
.pa-title{font-size:clamp(28px,4.2vw,46px);line-height:1.25;letter-spacing:-.02em;margin:14px 0 12px;position:relative;padding-bottom:14px}
html[lang="fa"] .pa-title,html[lang="ar"] .pa-title{letter-spacing:0;line-height:1.55}
.pa-title::after{content:"";position:absolute;bottom:0;inset-inline-start:0;height:4px;width:84px;border-radius:4px;background:var(--cyan);
  transform:scaleX(0);transform-origin:left;animation:paBar .9s var(--pa-ease) .35s forwards}
[dir="rtl"] .pa-title::after{transform-origin:right}
@keyframes paBar{to{transform:scaleX(1)}}
.pa-sub{font-size:17px;color:var(--text-dim);line-height:1.85;margin:0 0 16px;max-width:70ch}
.pa-meta{display:flex;flex-wrap:wrap;align-items:center;gap:10px 12px}
.pa-author{display:inline-flex;align-items:center;gap:10px;margin-inline-end:6px}
.pa-author > span:last-child{display:grid;line-height:1.35}
.pa-author b{font-size:14px}
.pa-author small{font-size:12px;color:var(--text-faint)}
.pa-av{border-radius:50%;display:grid;place-items:center;background:var(--cyan);color:var(--cyan-ink);font-weight:800;font-size:14px;overflow:hidden}
.pa-av img{width:100%;height:100%;object-fit:cover}
.pa-chip{display:inline-flex;align-items:center;gap:6px;padding:6px 11px;border-radius:99px;background:var(--surface-2);
  border:1px solid var(--line-soft,var(--line));font-size:12.5px;color:var(--text-dim);font-weight:600}
.pa-chip svg{color:var(--cyan)}
.pa-chip-steps svg{color:var(--pa-c3)}
.pa-share{display:inline-flex;gap:6px;margin-inline-start:auto}
.pa-share a,.pa-share button{width:36px;height:36px;border-radius:11px;display:grid;place-items:center;border:1px solid var(--line);
  background:var(--surface);color:var(--text-dim);cursor:pointer;transition:transform .2s var(--pa-ease),color .2s,border-color .2s,background .2s}
.pa-share a:hover,.pa-share button:hover{transform:translateY(-2px);color:var(--cyan);border-color:var(--cyan)}
.pa-share .is-done{color:#fff;background:var(--cyan);border-color:var(--cyan)}

/* hero image */
.pa-hero{margin:0 0 26px;border-radius:22px;overflow:hidden;aspect-ratio:21/9;background:var(--surface-2);box-shadow:0 24px 50px -30px rgba(0,0,0,.45)}
.pa-hero img{width:100%;height:100%;object-fit:cover;animation:paHero 1.6s var(--pa-ease) both}
@keyframes paHero{from{transform:scale(1.07);filter:saturate(.7)}}

/* ── article body ─────────────────────────────────────────────────── */
.pa-article{background:var(--surface);border:1px solid var(--line);border-radius:22px;padding:clamp(20px,3.4vw,40px)}
.pa-body{font-size:16.5px;line-height:2;color:var(--text-dim)}
html[lang="en"] .pa-body,html[lang="de"] .pa-body,html[lang="es"] .pa-body{line-height:1.85}
.pa-body > *:first-child{margin-top:0}
.pa-body p{margin:0 0 1.1em}
.pa-body .pa-lead{font-size:1.12em;color:var(--text);line-height:1.9}
.pa-body strong,.pa-body b{color:var(--text)}
.pa-body a{color:var(--cyan);text-decoration:none;background-image:linear-gradient(currentColor,currentColor);background-size:100% 1px;
  background-position:0 100%;background-repeat:no-repeat;transition:background-size .3s var(--pa-ease)}
.pa-body a:hover{background-size:0 1px}
.pa-body a.pa-ext::after{content:"↗";font-size:.8em;margin-inline-start:2px;opacity:.7}

/* headings: accent mark + underline that draws itself when it scrolls in */
.pa-body h2,.pa-body h3,.pa-body h4{color:var(--text);scroll-margin-top:96px;line-height:1.5}
.pa-body h2{font-size:1.5em;margin:1.9em 0 .7em;position:relative;padding-bottom:.35em;display:flex;align-items:center;gap:.5em}
.pa-body h2::before{content:"";width:.5em;height:.5em;border-radius:.16em;flex-shrink:0;background:var(--cyan);transform:rotate(45deg) scale(0);
  transition:transform .6s var(--pa-ease) .1s}
.pa-body h2::after{content:"";position:absolute;bottom:0;inset-inline-start:0;height:2px;width:100%;border-radius:2px;
  background:linear-gradient(90deg,var(--cyan),transparent 70%);transform:scaleX(0);transform-origin:left;transition:transform .9s var(--pa-ease) .15s}
[dir="rtl"] .pa-body h2::after{background:linear-gradient(270deg,var(--cyan),transparent 70%);transform-origin:right}
.pa-body h2.pa-in::before{transform:rotate(45deg) scale(1)}
.pa-body h2.pa-in::after{transform:scaleX(1)}
.pa-body h3{font-size:1.22em;margin:1.6em 0 .55em;color:color-mix(in srgb,var(--cyan) 70%,var(--text))}
.pa-body h4{font-size:1.06em;margin:1.4em 0 .5em}
.pa-body h2 .pa-w,.pa-title .pa-w{display:inline-block;opacity:0;transform:translateY(.45em);filter:blur(4px);
  transition:opacity .55s var(--pa-ease),transform .55s var(--pa-ease),filter .55s var(--pa-ease);transition-delay:calc(var(--i) * 45ms)}
.pa-body h2.pa-in .pa-w,.pa-title.pa-in .pa-w{opacity:1;transform:none;filter:none}

/* lists */
.pa-body ul{list-style:none;padding-inline-start:0;margin:0 0 1.2em}
.pa-body ul > li{position:relative;padding-inline-start:1.6em;margin-bottom:.55em}
.pa-body ul > li::before{content:"";position:absolute;inset-inline-start:.35em;top:.78em;width:.45em;height:.45em;border-radius:50%;
  background:var(--cyan);box-shadow:0 0 0 4px color-mix(in srgb,var(--cyan) 16%,transparent)}
.pa-body ol.pa-ol{list-style:none;counter-reset:pa;padding-inline-start:0;margin:0 0 1.4em;position:relative}
.pa-body ol.pa-ol > li{counter-increment:pa;position:relative;padding:.15em 0 1em;padding-inline-start:3.1em;--lc:var(--pa-c1)}
.pa-body ol.pa-ol > li:nth-child(6n+2){--lc:var(--pa-c2)}.pa-body ol.pa-ol > li:nth-child(6n+3){--lc:var(--pa-c3)}
.pa-body ol.pa-ol > li:nth-child(6n+4){--lc:var(--pa-c4)}.pa-body ol.pa-ol > li:nth-child(6n+5){--lc:var(--pa-c5)}
.pa-body ol.pa-ol > li:nth-child(6n){--lc:var(--pa-c6)}
.pa-body ol.pa-ol > li::before{content:counter(pa);position:absolute;inset-inline-start:0;top:.1em;width:2.1em;height:2.1em;border-radius:.7em;
  display:grid;place-items:center;font-weight:800;font-size:.85em;color:#fff;background:var(--lc);
  box-shadow:0 6px 14px -8px var(--lc);font-variant-numeric:tabular-nums}
.pa-body ol.pa-ol > li:not(:last-child)::after{content:"";position:absolute;inset-inline-start:.88em;top:2.15em;bottom:.15em;width:2px;border-radius:2px;
  background:linear-gradient(var(--lc),color-mix(in srgb,var(--lc) 10%,transparent))}
html[lang="fa"] .pa-body ol.pa-ol{counter-reset:pa}
html[lang="fa"] .pa-body ol.pa-ol > li::before{content:counter(pa,persian)}
html[lang="ar"] .pa-body ol.pa-ol > li::before{content:counter(pa,arabic-indic)}
.pa-body ol.pa-ol > li > p:last-child{margin-bottom:0}

/* step cards */
.pa-step{--sc:var(--pa-c1);position:relative;display:grid;grid-template-columns:auto minmax(0,1fr);gap:0 18px;margin:0 0 6px;padding-bottom:22px}
.pa-step:not(:last-child)::before{content:"";position:absolute;inset-inline-start:23px;top:52px;bottom:-2px;width:2px;
  background:repeating-linear-gradient(to bottom,color-mix(in srgb,var(--sc) 55%,transparent) 0 6px,transparent 6px 12px)}
.pa-step-n{width:48px;height:48px;border-radius:15px;display:grid;place-items:center;font-size:20px;font-weight:900;color:#fff;
  background:var(--sc);box-shadow:0 10px 22px -10px var(--sc),inset 0 1px 0 rgba(255,255,255,.25);position:relative;z-index:1;
  font-variant-numeric:tabular-nums}
html[lang="fa"] .pa-step-n,html[lang="ar"] .pa-step-n{font-family:Vazirmatn,inherit}
.pa-step-b{background:color-mix(in srgb,var(--sc) 6%,var(--surface));border:1px solid color-mix(in srgb,var(--sc) 22%,var(--line));
  border-radius:18px;padding:16px 20px 6px;min-width:0;transition:border-color .3s,box-shadow .3s}
.pa-step:hover .pa-step-b{border-color:color-mix(in srgb,var(--sc) 45%,var(--line));box-shadow:0 16px 34px -24px var(--sc)}
.pa-body .pa-step-h{color:var(--sc);margin:0 0 .5em!important;padding:0!important;display:block!important;font-size:1.25em}
.pa-body .pa-step-h::before,.pa-body .pa-step-h::after{content:none!important}
.pa-step-b > :last-child{margin-bottom:1em}
.pa-step-b ul > li::before{background:var(--sc);box-shadow:0 0 0 4px color-mix(in srgb,var(--sc) 16%,transparent)}
.pa-step.pa-rv{opacity:0;transform:translateY(18px)}
.pa-step.pa-rv .pa-step-n{transform:scale(.4) rotate(-12deg);opacity:0}
.pa-step.pa-rv.pa-in{opacity:1;transform:none;transition:opacity .6s var(--pa-ease),transform .6s var(--pa-ease)}
.pa-step.pa-rv.pa-in .pa-step-n{transform:none;opacity:1;transition:transform .55s var(--pa-ease) .12s,opacity .3s .12s}

/* call-outs */
.pa-co{--k:var(--pa-c2);position:relative;padding:14px 18px;padding-inline-start:52px;border-radius:16px;margin:1.2em 0;color:var(--text);
  background:color-mix(in srgb,var(--k) 9%,var(--surface));border:1px solid color-mix(in srgb,var(--k) 25%,transparent)}
.pa-co::before{position:absolute;inset-inline-start:14px;top:14px;width:26px;height:26px;border-radius:9px;display:grid;place-items:center;
  font-weight:900;font-size:14px;color:#fff;background:var(--k);font-family:system-ui,sans-serif}
.pa-co-tip{--k:var(--pa-c1)} .pa-co-tip::before{content:"★"}
.pa-co-note{--k:var(--pa-c2)} .pa-co-note::before{content:"i";font-style:italic;font-family:Georgia,serif}
.pa-co-warn{--k:var(--pa-c3)} .pa-co-warn::before{content:"!"}
.pa-co-ok{--k:var(--pa-c6)} .pa-co-ok::before{content:"✓"}
.pa-co strong:first-child,.pa-co b:first-child{color:var(--k)}

.pa-body .pa-quote{margin:1.4em 0;padding:18px 22px;border-radius:18px;background:var(--surface-2);position:relative;color:var(--text);font-size:1.05em}
.pa-body .pa-quote::before{content:"“";position:absolute;top:-14px;inset-inline-start:16px;font-size:64px;line-height:1;color:var(--cyan);opacity:.35;font-family:Georgia,serif}
.pa-table{overflow-x:auto;margin:1.2em 0;border:1px solid var(--line);border-radius:14px}
.pa-body .pa-table table{display:table;margin:0;min-width:100%;border:0}
.pa-body .pa-table th{background:var(--surface-2);color:var(--text);font-weight:700;text-align:start}
.pa-body .pa-table td,.pa-body .pa-table th{border:0;border-bottom:1px solid var(--line-soft,var(--line));padding:10px 14px}
.pa-body .pa-table tr:last-child td{border-bottom:0}
.pa-body .pa-table tr:nth-child(even) td{background:color-mix(in srgb,var(--surface-2) 55%,transparent)}
.pa-body pre.pa-code{position:relative;direction:ltr;text-align:left;background:#0F1620;color:#DCE6F2;border-radius:14px;padding:16px 18px;overflow:auto;font-size:13.5px;line-height:1.7}
.pa-codecopy{position:absolute;top:8px;right:8px;border:0;border-radius:8px;background:rgba(255,255,255,.1);color:#fff;font-size:12px;padding:4px 9px;cursor:pointer}
.pa-codecopy:hover{background:rgba(255,255,255,.2)}
.pa-body code:not(pre code){background:var(--surface-2);border:1px solid var(--line-soft,var(--line));border-radius:6px;padding:1px 6px;font-size:.88em;color:var(--text)}
.pa-body img{border-radius:14px;box-shadow:0 14px 30px -22px rgba(0,0,0,.45)}
.pa-body hr{border:0;height:1px;background:var(--line);margin:2em 0}

/* inline toc (phones / narrow screens) */
.pa-toc-inline{margin:0 0 22px;border:1px solid var(--line);border-radius:16px;background:var(--surface-2);overflow:hidden}
.pa-toc-inline summary{list-style:none;cursor:pointer;display:flex;align-items:center;gap:8px;padding:12px 16px;font-weight:700;color:var(--text)}
.pa-toc-inline summary::-webkit-details-marker{display:none}
.pa-toc-inline summary small{margin-inline-start:auto;background:var(--surface);border-radius:99px;padding:1px 9px;color:var(--text-faint);font-weight:700}
.pa-toc-inline ol,.pa-toc ol{list-style:none;margin:0;padding:4px 10px 12px;display:grid;gap:2px;counter-reset:t}
.pa-toc-inline li a,.pa-toc li a{display:block;padding:6px 10px;border-radius:9px;color:var(--text-dim);text-decoration:none;font-size:13.5px;line-height:1.55;
  transition:background .2s,color .2s}
.pa-toc-inline li.lv3 a,.pa-toc li.lv3 a{padding-inline-start:24px;font-size:12.5px}
.pa-toc-inline li a:hover,.pa-toc li a:hover{background:var(--surface);color:var(--text)}
@media (min-width:981px){.pa-toc-inline{display:none}}

/* sidebar toc: sticky, scroll-spy */
.pa-layout{align-items:stretch}
.pa-layout .bl-side{position:static;align-content:start}
.pa-toc{position:sticky;top:88px;max-height:calc(100vh - 110px);overflow:auto;scrollbar-width:thin}
.pa-toc h4{margin-bottom:8px}
.pa-toc-pct{margin-inline-start:auto;font-size:11.5px;font-weight:800;color:var(--cyan);background:var(--cyan-dim);padding:1px 8px;border-radius:99px;font-variant-numeric:tabular-nums}
.pa-toc ol{padding:0}
.pa-toc li a{position:relative}
.pa-toc li a.is-on{color:var(--cyan);background:var(--cyan-dim);font-weight:700}
.bl-sbsearch{padding:12px}
.bl-sbsearch .bl-search{min-width:0}
.bl-latest{list-style:none;margin:0;padding:0;display:grid;gap:4px}
.bl-latest a{display:grid;gap:3px;padding:9px 10px;border-radius:12px;text-decoration:none;color:var(--text);transition:background .2s}
.bl-latest a:hover{background:var(--surface-2)}
.bl-latest b{font-size:13.5px;font-weight:600;line-height:1.5;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.bl-latest small{display:inline-flex;gap:5px;align-items:center;color:var(--text-faint);font-size:11.5px}
.bl-pop-ph{width:58px;height:44px;border-radius:10px;display:grid;place-items:center;background:var(--surface-2);color:var(--text-faint)}

/* tags, end bar, prev/next */
.pa-tags{display:flex;flex-wrap:wrap;align-items:center;gap:8px;margin-top:28px;padding-top:20px;border-top:1px dashed var(--line)}
.pa-tags-l{display:inline-flex;align-items:center;gap:6px;font-weight:700;color:var(--text);margin-inline-end:4px}
.pa-tags-l svg{color:var(--cyan)}
.pa-tags a{padding:6px 13px;border-radius:99px;font-size:13px;font-weight:600;text-decoration:none;color:var(--text-dim);background:var(--surface-2);
  border:1px solid var(--line-soft,var(--line));transition:transform .2s var(--pa-ease),color .2s,border-color .2s,background .2s}
.pa-tags a:nth-child(6n+2):hover{--h:var(--pa-c1)}.pa-tags a:nth-child(6n+3):hover{--h:var(--pa-c2)}.pa-tags a:nth-child(6n+4):hover{--h:var(--pa-c3)}
.pa-tags a:nth-child(6n+5):hover{--h:var(--pa-c4)}.pa-tags a:nth-child(6n):hover{--h:var(--pa-c5)}.pa-tags a:nth-child(6n+1):hover{--h:var(--pa-c6)}
.pa-tags a:hover{transform:translateY(-2px);color:var(--h);border-color:color-mix(in srgb,var(--h) 45%,transparent);background:color-mix(in srgb,var(--h) 9%,var(--surface))}
.pa-endbar{display:flex;align-items:center;flex-wrap:wrap;gap:12px;margin-top:22px;padding:14px 16px;border-radius:16px;background:var(--surface-2);
  font-weight:700;color:var(--text)}
.pa-adj{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-top:22px}
.pa-adj a{display:flex;align-items:center;gap:12px;padding:12px;border-radius:16px;border:1px solid var(--line);text-decoration:none;color:var(--text);
  background:var(--surface);transition:transform .25s var(--pa-ease),border-color .25s,box-shadow .25s;min-width:0}
.pa-adj a:hover{transform:translateY(-3px);border-color:var(--cyan);box-shadow:0 16px 30px -22px rgba(0,0,0,.5)}
.pa-adj-n{flex-direction:row-reverse;text-align:end}
.pa-adj img{width:72px;height:56px;border-radius:12px;object-fit:cover;flex-shrink:0}
.pa-adj span{display:grid;gap:3px;min-width:0}
.pa-adj small{display:inline-flex;align-items:center;gap:5px;color:var(--cyan);font-weight:700;font-size:12px}
.pa-adj-n small{justify-content:flex-end}
.pa-adj b{font-size:14px;line-height:1.5;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
/* the arrow icon points "back" in LTR terms (←); flip so next always points forward */
html:not([dir="rtl"]) .pa-adj-n small svg{transform:scaleX(-1)}
[dir="rtl"] .pa-adj-p small svg{transform:scaleX(-1)}

/* related */
.pa-related{margin-top:34px}
.pa-sec-h{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:16px}
.pa-sec-h h2{display:flex;align-items:center;gap:9px;margin:0;font-size:22px}
.pa-sec-h h2 svg{color:var(--pa-c3)}
.pa-sec-h a{display:inline-flex;align-items:center;gap:6px;color:var(--cyan);font-weight:700;font-size:14px;text-decoration:none}
html:not([dir="rtl"]) .pa-sec-h a svg{transform:scaleX(-1)}
.pa-related .bl-grid{grid-template-columns:repeat(auto-fill,minmax(230px,1fr))}
.pa-match{position:absolute;bottom:10px;inset-inline-end:10px;display:inline-flex;align-items:center;gap:4px;padding:3px 9px;border-radius:99px;
  font-size:11px;font-weight:800;color:#fff;background:rgba(0,0,0,.55);-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px)}

/* blog index heading gets the same entrance */
.bl-head h1{position:relative}

@media (max-width:980px){
  .pa-layout .bl-side{grid-template-columns:1fr}
  .pa-toc{display:none}
  .pa-share{margin-inline-start:0}
}
@media (max-width:640px){
  .pa-hero{aspect-ratio:16/10;border-radius:16px}
  .pa-article{border-radius:16px}
  .pa-body{font-size:16px}
  .pa-adj{grid-template-columns:1fr}
  .pa-step{grid-template-columns:1fr;gap:10px}
  .pa-step-n{width:40px;height:40px;font-size:17px;border-radius:12px}
  .pa-step:not(:last-child)::before{display:none}
  .pa-step-b{padding:14px 15px 4px}
}
@media (prefers-reduced-motion:reduce){
  .pa-title::after,.pa-hero img{animation:none;transform:none}
  .pa-body h2::before{transform:rotate(45deg) scale(1);transition:none}
  .pa-body h2::after{transform:scaleX(1);transition:none}
  .pa-body h2 .pa-w,.pa-title .pa-w,.pa-step.pa-rv,.pa-step.pa-rv .pa-step-n{opacity:1;transform:none;filter:none;transition:none}
}
html.motion-off .pa-title::after{animation:none;transform:scaleX(1)}
html.motion-off .pa-hero img{animation:none}