/* Shared design system for subpages (publications, media).
   Mirrors the homepage tokens so subpages feel native. */
:root{
  --paper:#F5F6F8; --paper-raised:#FFFFFF;
  --ink:#15181F; --ink-soft:#525a68; --ink-faint:#838c9b;
  --line:#E3E6EC; --line-strong:#cfd4dd;
  --accent:#0969DA; --accent-deep:#0550AE; --accent-soft:rgba(9,105,218,.10);
  --accept:#157f52; --accept-soft:rgba(21,127,82,.10);
  --reject:#c0392b; --reject-soft:rgba(192,57,43,.08);
  --amber:#a86a12;
  --display:'Space Grotesk',system-ui,sans-serif;
  --body:'Inter',system-ui,sans-serif;
  --mono:'JetBrains Mono',ui-monospace,monospace;
  --maxw:1080px; --r:14px;
}
html{color-scheme:light}
html[data-theme="dark"]{
  color-scheme:dark;
  --paper:#0d1017; --paper-raised:#161b24;
  --ink:#e7ebf2; --ink-soft:#a6b0c0; --ink-faint:#6f7989;
  --line:#222a37; --line-strong:#333d4d;
  --accent:#58A6FF; --accent-deep:#79C0FF; --accent-soft:rgba(88,166,255,.16);
  --accept:#43b985; --accept-soft:rgba(67,185,133,.16);
  --reject:#e5675a; --reject-soft:rgba(229,103,90,.14);
  --amber:#d6a14e;
}
[dir="rtl"]{--display:'Cairo','Space Grotesk',sans-serif;--body:'Tajawal','Inter',sans-serif}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;background:var(--paper);color:var(--ink);font-family:var(--body);
  font-size:17px;line-height:1.65;-webkit-font-smoothing:antialiased;
  transition:background .3s ease,color .3s ease;overflow-x:hidden;
}
a{color:inherit;text-decoration:none}
::selection{background:var(--accent);color:#fff}
.scroll-progress{
  position:fixed;left:0;right:0;top:0;z-index:300;height:3px;
  background:linear-gradient(90deg,var(--accent),var(--accept));
  transform:scaleX(var(--scroll-progress,0));transform-origin:left;
}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 28px}
.skip{position:absolute;left:-999px;top:0;z-index:200;background:var(--ink);color:#fff;padding:10px 16px;border-radius:0 0 8px 0;font-family:var(--mono);font-size:13px}
.skip:focus{left:0}

.eyebrow{font-family:var(--mono);font-size:12px;font-weight:500;letter-spacing:.14em;text-transform:uppercase;color:var(--accent);display:inline-flex;align-items:center;gap:8px}
.eyebrow::before{content:"";width:22px;height:1px;background:var(--accent);display:inline-block}

/* nav */
header.nav{position:sticky;top:0;z-index:100;background:color-mix(in srgb,var(--paper) 88%,transparent);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:64px}
.brand{display:flex;align-items:center;gap:11px;font-family:var(--display);font-weight:600;font-size:15px;letter-spacing:-.01em}
.mono-badge{width:34px;height:34px;border-radius:9px;background:var(--ink);color:var(--paper);display:grid;place-items:center;font-family:var(--mono);font-weight:600;font-size:14px;letter-spacing:-.04em}
.nav-links{display:flex;gap:26px;align-items:center}
.nav-links a{font-family:var(--mono);font-size:13px;color:var(--ink-soft);position:relative;padding:4px 0;transition:color .2s}
.nav-links a:hover,.nav-links a[aria-current="page"]{color:var(--ink)}
.nav-links a::after{content:"";position:absolute;left:0;bottom:-2px;height:1.5px;width:0;background:var(--accent);transition:width .25s}
.nav-links a:hover::after,.nav-links a[aria-current="page"]::after{width:100%}
.nav-tools{display:flex;align-items:center;gap:10px}
.icon-btn{width:36px;height:36px;display:grid;place-items:center;background:transparent;border:1px solid var(--line-strong);border-radius:9px;color:var(--ink-soft);cursor:pointer;transition:border-color .2s,color .2s;font-family:var(--mono);font-size:13px;font-weight:600}
.icon-btn:hover{border-color:var(--accent);color:var(--accent)}
.icon-btn svg{width:17px;height:17px}
.icon-btn .ic-sun{display:none}
html[data-theme="dark"] .icon-btn .ic-moon{display:none}
html[data-theme="dark"] .icon-btn .ic-sun{display:block}
.nav-cta{font-family:var(--mono);font-size:13px;font-weight:500;border:1px solid var(--line-strong);border-radius:8px;padding:7px 14px;color:var(--ink);transition:.2s}
.nav-cta:hover{border-color:var(--accent);color:var(--accent)}
@media(max-width:760px){.nav-links{display:none}}

/* page head */
.page-head{padding:64px 0 8px}
.page-head h1{font-family:var(--display);font-weight:600;font-size:clamp(2rem,5vw,3rem);letter-spacing:-.03em;line-height:1.05;margin:.6rem 0 0}
.page-head p{color:var(--ink-soft);max-width:60ch;margin:.9rem 0 0}
.back{font-family:var(--mono);font-size:13px;color:var(--ink-soft);display:inline-flex;align-items:center;gap:7px;transition:color .2s}
.back:hover{color:var(--accent)}

main{padding-bottom:40px}
section{padding:34px 0}
.sub-eyebrow{margin:8px 0 20px}

/* generic state tag (matches homepage PR tags) */
.tag{font-family:var(--mono);font-size:11px;font-weight:600;letter-spacing:.04em;padding:4px 10px;border-radius:999px;display:inline-flex;align-items:center;gap:6px;text-transform:uppercase}
.tag.merged{background:var(--accent-soft);color:var(--accent-deep)}
.tag.open{background:var(--accept-soft);color:var(--accept)}
.tag.draft{background:#eef0f3;color:var(--ink-soft)}
html[data-theme="dark"] .tag.draft{background:#222a37}
.tag.venue{background:transparent;color:var(--ink-faint);border:1px dashed var(--line-strong);font-weight:500}

/* cards grid (articles / videos) */
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:18px}
.card{background:var(--paper-raised);border:1px solid var(--line);border-radius:var(--r);overflow:hidden;display:flex;flex-direction:column;transition:border-color .2s,transform .2s,box-shadow .2s}
.card:hover{border-color:var(--line-strong);transform:translateY(-3px);box-shadow:0 18px 40px -28px rgba(21,24,31,.35)}
.card .thumb{aspect-ratio:16/9;width:100%;object-fit:cover;background:var(--line);display:block}
.card .body{padding:16px 18px;display:flex;flex-direction:column;gap:8px;flex:1}
.card h3{font-family:var(--display);font-weight:600;font-size:1.05rem;line-height:1.3;letter-spacing:-.015em;margin:0}
.card p{margin:0;color:var(--ink-soft);font-size:.92rem}
.card .meta{margin-top:auto;font-family:var(--mono);font-size:12px;color:var(--ink-faint);display:flex;gap:12px;flex-wrap:wrap;align-items:center}
.card .play{position:relative}
.card .play::after{content:"";position:absolute;inset:0;background:rgba(13,16,23,.18);opacity:0;transition:opacity .2s}
.card:hover .play::after{opacity:1}

.empty{color:var(--ink-faint);font-family:var(--mono);font-size:13px;border:1px dashed var(--line-strong);border-radius:var(--r);padding:26px;text-align:center}

footer{border-top:1px solid var(--line);padding:30px 0;color:var(--ink-faint);margin-top:30px}
.foot-inner{display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;font-family:var(--mono);font-size:12px}

.reveal{opacity:0;transform:translateY(16px);transition:opacity .55s ease,transform .55s ease}
.reveal.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){.reveal{opacity:1;transform:none;transition:none}html{scroll-behavior:auto}}
:focus-visible{outline:2.5px solid var(--accent);outline-offset:3px;border-radius:4px}

/* publications list */
.pub-list{display:flex;flex-direction:column;gap:16px}
.pub{background:var(--paper-raised);border:1px solid var(--line);border-radius:var(--r);padding:22px 24px;transition:border-color .2s,transform .2s,box-shadow .2s}
.pub:hover{border-color:var(--line-strong);transform:translateY(-2px);box-shadow:0 18px 40px -28px rgba(21,24,31,.35)}
.pub .tags{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:10px}
.pub h3{font-family:var(--display);font-weight:600;font-size:1.18rem;line-height:1.32;letter-spacing:-.015em;margin:0 0 6px}
.pub .authors{color:var(--ink-soft);font-size:.96rem;margin:0 0 3px}
.pub .authors .me{color:var(--ink);font-weight:600;border-bottom:2px solid var(--accent-soft)}
.pub .venue{color:var(--ink-faint);font-size:.92rem;margin:0}
.pub .links{margin-top:12px;display:flex;gap:10px;flex-wrap:wrap;font-family:var(--mono);font-size:12.5px}
.pub .links a,.pub .links button{color:var(--accent-deep);background:none;border:0;padding:0;cursor:pointer;font:inherit;border-bottom:1px solid transparent;transition:border-color .2s}
.pub .links a:hover,.pub .links button:hover{border-color:var(--accent-deep)}
.bib{margin-top:12px;background:var(--paper);border:1px solid var(--line);border-radius:10px;padding:14px 16px;font-family:var(--mono);font-size:12px;line-height:1.6;color:var(--ink-soft);overflow-x:auto;white-space:pre;display:none}
.bib.show{display:block}
.abs{margin-top:12px;background:var(--accent-soft);border-left:3px solid var(--accent);border-radius:0 8px 8px 0;padding:14px 16px;font-size:.95rem;line-height:1.62;color:var(--ink);display:none}
.abs.show{display:block}
[dir="rtl"] .abs{border-left:0;border-right:3px solid var(--accent);border-radius:8px 0 0 8px}

.signature-scroll{
  --merge-progress:0%;
  position:relative;
  padding-left:38px;
}
.signature-scroll::before,
.signature-scroll::after{
  content:"";position:absolute;left:10px;top:42px;width:3px;border-radius:999px;
}
.signature-scroll::before{bottom:42px;background:var(--line)}
.signature-scroll::after{
  height:var(--merge-progress);max-height:calc(100% - 84px);
  background:linear-gradient(180deg,var(--accent),var(--accept));
  transition:height .08s linear;
}
.signature-scroll .pub{position:relative}
.signature-scroll .pub::before{
  content:"";position:absolute;left:-36px;top:28px;width:15px;height:15px;border-radius:50%;
  background:var(--paper);border:2px solid var(--line-strong);
  box-shadow:0 0 0 5px var(--paper);
  transition:background .25s,border-color .25s,box-shadow .25s,transform .25s;
}
.signature-scroll .pub[data-state="merged"]{--node:var(--accent);--node-soft:var(--accent-soft)}
.signature-scroll .pub[data-state="open"]{--node:var(--accept);--node-soft:var(--accept-soft)}
.signature-scroll .pub[data-state="draft"]{--node:var(--ink-faint);--node-soft:rgba(131,140,155,.18)}
.signature-scroll .pub.lit::before{
  background:var(--node);border-color:var(--node);
  box-shadow:0 0 0 5px var(--paper),0 0 0 10px var(--node-soft);
  transform:scale(1.05);
}
[dir="rtl"] .signature-scroll{padding-left:0;padding-right:38px}
[dir="rtl"] .signature-scroll::before,
[dir="rtl"] .signature-scroll::after{left:auto;right:10px}
[dir="rtl"] .signature-scroll .pub::before{left:auto;right:-36px}

[dir="rtl"] .eyebrow::before{margin-left:0}
[dir="rtl"] .pub .authors .me{border-bottom-color:var(--accent-soft)}
[dir="rtl"] .card .meta,[dir="rtl"] .pub .venue{direction:rtl}

@media(max-width:560px){
  .wrap{padding:0 20px}
  .signature-scroll{padding-left:30px}
  .signature-scroll .pub::before{left:-30px}
  [dir="rtl"] .signature-scroll{padding-left:0;padding-right:30px}
  [dir="rtl"] .signature-scroll .pub::before{left:auto;right:-30px}
}

@media (prefers-reduced-motion:reduce){
  .scroll-progress{transition:none}
  .signature-scroll::after{height:100%;transition:none}
  .signature-scroll .pub::before{transition:none}
}

/* projects / software — built on .card + the PR/diff vocabulary */
.proj .body{gap:11px;padding:20px 20px 18px}
.proj-top{display:flex;align-items:center;justify-content:space-between;gap:10px;flex-wrap:wrap}
.proj h3{font-size:1.12rem}
.proj p{font-size:.93rem;line-height:1.5}
.diffstat{font-family:var(--mono);font-size:12px;display:inline-flex;gap:9px;align-items:center;white-space:nowrap}
.diffstat .add{color:var(--accept);font-weight:600}
.diffstat .del{color:var(--reject);font-weight:600}
.diffstat .stars{color:var(--amber);font-weight:600}
.stack{display:flex;flex-wrap:wrap;gap:7px;margin-top:2px}
.stack span{font-family:var(--mono);font-size:11.5px;color:var(--ink-soft);border:1px solid var(--line-strong);border-radius:999px;padding:4px 10px;line-height:1.2}
.proj .links{margin-top:auto;padding-top:6px;display:flex;gap:14px;flex-wrap:wrap;font-family:var(--mono);font-size:12.5px}
.proj .links a{color:var(--accent-deep);border-bottom:1px solid transparent;transition:border-color .2s;display:inline-flex;align-items:center;gap:5px}
.proj .links a:hover{border-color:var(--accent-deep)}
[dir="rtl"] .proj-top,[dir="rtl"] .stack,[dir="rtl"] .proj .links{direction:rtl}

/* article (full Medium post mirrored locally) */
.article-layout{display:grid;grid-template-columns:minmax(0,1fr) 250px;gap:48px;align-items:start}
.article-layout.solo{display:block}
.article-main{min-width:0}
.article-layout:not(.solo) .article-head,
.article-layout:not(.solo) .prose,
.article-layout:not(.solo) .article-foot{margin-left:0;margin-right:0}

.article-rail{padding-top:60px}
.rail-sticky{position:sticky;top:84px}
.rail-label{font-family:var(--mono);font-size:12px;font-weight:500;letter-spacing:.14em;text-transform:uppercase;color:var(--accent);display:block;margin-bottom:12px}
.rail-list{list-style:none;margin:0;padding:0}
.rail-list a{display:block;padding:11px 0;border-top:1px solid var(--line);transition:color .2s}
.rail-list li:first-child a{border-top:0;padding-top:0}
.rail-title{display:block;font-family:var(--display);font-weight:500;font-size:.92rem;line-height:1.34;letter-spacing:-.01em;color:var(--ink);transition:color .2s}
.rail-list a:hover .rail-title{color:var(--accent)}
.rail-date{display:block;font-family:var(--mono);font-size:11px;color:var(--ink-faint);margin-top:5px}
.rail-all{display:inline-block;margin-top:16px;font-family:var(--mono);font-size:12.5px;color:var(--accent-deep);border-bottom:1px solid transparent;transition:border-color .2s}
.rail-all:hover{border-color:var(--accent-deep)}
@media(max-width:900px){
  .article-layout{grid-template-columns:1fr;gap:0}
  .article-rail{padding-top:30px;margin-top:34px;border-top:1px solid var(--line)}
  .rail-sticky{position:static}
  .rail-list{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:0 28px}
  .rail-list a{border-top:1px solid var(--line)}
  .rail-list li:first-child a{border-top:1px solid var(--line);padding-top:11px}
}

.article-head{max-width:72ch;margin:0 auto;padding:56px 0 6px}
.article-head h1{font-family:var(--display);font-weight:700;font-size:clamp(1.9rem,4.6vw,2.8rem);letter-spacing:-.03em;line-height:1.08;margin:.7rem 0 0}
.article-meta{margin-top:14px;font-family:var(--mono);font-size:12.5px;color:var(--ink-faint);display:flex;gap:8px 16px;flex-wrap:wrap;align-items:center}
.article-meta a{color:var(--accent-deep);border-bottom:1px solid transparent;transition:border-color .2s}
.article-meta a:hover{border-color:var(--accent-deep)}

.prose{max-width:72ch;margin:26px auto 0;font-size:1.07rem;line-height:1.78;color:var(--ink)}
.prose>*:first-child{margin-top:0}
.prose p{margin:0 0 1.25em}
.prose h2,.prose h3,.prose h4{font-family:var(--display);font-weight:600;letter-spacing:-.02em;line-height:1.25;color:var(--ink);margin:1.9em 0 .55em}
.prose h2{font-size:1.7rem}
.prose h3{font-size:1.42rem}
.prose h4{font-size:1.16rem}
.prose a{color:var(--accent-deep);border-bottom:1px solid var(--accent-soft);transition:border-color .2s}
.prose a:hover{border-color:var(--accent-deep)}
.prose strong{font-weight:600;color:var(--ink)}
.prose em{font-style:italic}
.prose img{max-width:100%;height:auto;border-radius:12px;display:block;margin:0 auto}
.prose figure{margin:1.9em 0}
.prose figcaption{margin-top:.7em;text-align:center;font-family:var(--mono);font-size:.82rem;color:var(--ink-faint)}
.prose ul,.prose ol{margin:0 0 1.25em;padding-left:1.45em}
.prose li{margin:.4em 0}
.prose li::marker{color:var(--accent)}
.prose blockquote{margin:1.7em 0;padding:.7em 1.25em;border-left:3px solid var(--accent);background:var(--accent-soft);border-radius:0 8px 8px 0;color:var(--ink)}
[dir="rtl"] .prose blockquote{border-left:0;border-right:3px solid var(--accent);border-radius:8px 0 0 8px}
.prose blockquote p:last-child{margin-bottom:0}
.prose pre{margin:1.7em 0;background:#0d1017;color:#e7ebf2;border:1px solid var(--line-strong);border-radius:12px;padding:16px 18px;overflow-x:auto;font-family:var(--mono);font-size:.84rem;line-height:1.65}
html[data-theme="dark"] .prose pre{background:#05070b}
.prose code{font-family:var(--mono);font-size:.86em;background:var(--accent-soft);padding:.12em .42em;border-radius:6px}
.prose pre code{background:none;padding:0;font-size:1em;color:inherit}
.prose hr{border:0;border-top:1px solid var(--line);margin:2.4em 0}

.article-foot{max-width:72ch;margin:40px auto 0;padding-top:22px;border-top:1px solid var(--line);display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;align-items:center}
.read-on-medium{font-family:var(--mono);font-size:13px;font-weight:500;border:1px solid var(--line-strong);border-radius:9px;padding:9px 16px;color:var(--ink);transition:border-color .2s,color .2s}
.read-on-medium:hover{border-color:var(--accent);color:var(--accent)}

@media print{
  html,body{background:#fff!important;color:#111!important}
  header.nav,.scroll-progress,.nav-tools,.back,.links button{display:none!important}
  .wrap{max-width:none;padding:0}
  .page-head,section{padding:14px 0}
  .grid,.pub-list{display:block}
  .card,.pub{box-shadow:none!important;border-color:#ccc!important;break-inside:avoid;margin:0 0 12px}
  .signature-scroll{padding-left:0}
  .signature-scroll::before,.signature-scroll::after,.signature-scroll .pub::before{display:none!important}
  .reveal{opacity:1!important;transform:none!important}
  .bib.show,.abs.show{display:block}
  a[href^="http"]::after{content:" (" attr(href) ")";font-size:10px;color:#555}
}

/* ---- topic filter (Writing & Talks) ---- */
.topic-filter{display:flex;flex-wrap:wrap;gap:8px;margin:18px 0 4px}
.topic-chip{font-family:var(--mono);font-size:12px;font-weight:500;letter-spacing:.02em;padding:6px 12px;border:1px solid var(--line-strong);border-radius:999px;background:var(--paper-raised);color:var(--ink-soft);cursor:pointer;transition:border-color .18s,color .18s,background .18s}
.topic-chip:hover{border-color:var(--accent);color:var(--accent)}
.topic-chip .n{opacity:.55;margin-left:5px}
.topic-chip.is-active{background:var(--accent);border-color:var(--accent);color:#fff}
.topic-chip.is-active .n{opacity:.85}

/* ---- global search overlay ---- */
.search-modal{position:fixed;inset:0;z-index:1000;display:flex;justify-content:center;align-items:flex-start;padding:12vh 20px 20px}
.search-modal[hidden]{display:none}
.search-backdrop{position:absolute;inset:0;background:rgba(13,16,23,.5);backdrop-filter:blur(2px);opacity:0;transition:opacity .16s}
.search-modal.show .search-backdrop{opacity:1}
.search-panel{position:relative;width:100%;max-width:600px;background:var(--paper-raised);border:1px solid var(--line-strong);border-radius:var(--r);box-shadow:0 30px 80px -30px rgba(13,16,23,.6);overflow:hidden;transform:translateY(-8px);opacity:0;transition:transform .16s,opacity .16s}
.search-modal.show .search-panel{transform:none;opacity:1}
.search-bar{display:flex;align-items:center;gap:10px;padding:14px 16px;border-bottom:1px solid var(--line)}
.search-bar svg{width:18px;height:18px;color:var(--ink-faint);flex:none}
.search-bar input{flex:1;min-width:0;border:0;background:transparent;font-family:var(--body);font-size:1rem;color:var(--ink);outline:none}
.search-bar input::placeholder{color:var(--ink-faint)}
.search-bar input::-webkit-search-cancel-button{-webkit-appearance:none}
.search-esc{font-family:var(--mono);font-size:11px;color:var(--ink-faint);border:1px solid var(--line-strong);border-radius:6px;padding:2px 6px;cursor:pointer}
.search-results{max-height:54vh;overflow-y:auto;padding:6px}
.search-hint{padding:22px 14px;text-align:center;color:var(--ink-faint);font-family:var(--mono);font-size:13px}
.search-hit{display:flex;gap:12px;align-items:flex-start;padding:10px 12px;border-radius:10px;text-decoration:none;color:inherit}
.search-hit:hover,.search-hit.is-active{background:var(--accent-soft)}
.hit-type{flex:none;font-family:var(--mono);font-size:10px;font-weight:600;letter-spacing:.06em;text-transform:uppercase;padding:3px 7px;border-radius:999px;margin-top:2px;background:#eef0f3;color:var(--ink-soft)}
.hit-type.t-article{background:var(--accent-soft);color:var(--accent-deep)}
.hit-type.t-talk{background:var(--reject-soft);color:var(--reject)}
.hit-type.t-publication{background:var(--accept-soft);color:var(--accept)}
.hit-type.t-project{background:rgba(168,106,18,.12);color:var(--amber)}
.hit-main{display:flex;flex-direction:column;gap:2px;min-width:0}
.hit-title{font-family:var(--display);font-weight:600;font-size:.96rem;line-height:1.3;color:var(--ink)}
.hit-snip{color:var(--ink-soft);font-size:.84rem;line-height:1.4;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.search-hit mark{background:rgba(9,105,218,.20);color:inherit;border-radius:3px;padding:0 1px}
.search-foot{display:flex;gap:16px;padding:10px 16px;border-top:1px solid var(--line);font-family:var(--mono);font-size:11px;color:var(--ink-faint)}
.search-foot kbd{border:1px solid var(--line-strong);border-radius:5px;padding:1px 5px;margin-right:3px}
html[data-theme="dark"] .hit-type{background:#222a37}
html[data-theme="dark"] .search-backdrop{background:rgba(0,0,0,.62)}
@media(max-width:560px){.search-modal{padding:8vh 12px 12px}.search-foot{display:none}}

/* ---- article reading aids: copy buttons + table of contents ---- */
.prose pre,pre.code{position:relative}
.copy-btn{position:absolute;top:8px;right:8px;font-family:var(--mono);font-size:11px;line-height:1;padding:5px 9px;border-radius:7px;border:1px solid rgba(255,255,255,.18);background:rgba(255,255,255,.08);color:#e7ebf2;cursor:pointer;opacity:0;transition:opacity .15s,background .15s}
.prose pre:hover .copy-btn,pre.code:hover .copy-btn,.copy-btn:focus-visible{opacity:1}
.copy-btn:hover{background:rgba(255,255,255,.18)}
@media(hover:none){.copy-btn{opacity:1}}
.prose h2[id],.prose h3[id]{scroll-margin-top:84px}
.toc{margin:0 0 26px;border:1px solid var(--line);border-radius:var(--r);background:var(--paper-raised);padding:4px 16px}
.toc>summary{font-family:var(--mono);font-size:12px;letter-spacing:.06em;text-transform:uppercase;color:var(--ink-faint);cursor:pointer;padding:10px 0;list-style:none}
.toc>summary::-webkit-details-marker{display:none}
.toc>summary::before{content:"▸";display:inline-block;margin-right:8px;transition:transform .15s}
.toc[open]>summary::before{transform:rotate(90deg)}
.toc ul{list-style:none;margin:0 0 8px;padding:0;columns:2;column-gap:28px}
.toc li{break-inside:avoid;margin:3px 0}
.toc li.toc-h3{padding-left:14px}
.toc a{color:var(--ink-soft);font-size:.9rem;text-decoration:none;border-bottom:1px solid transparent}
.toc a:hover{color:var(--accent);border-bottom-color:var(--accent-soft)}
@media(max-width:640px){.toc ul{columns:1}}
@media(prefers-reduced-motion:no-preference){html{scroll-behavior:smooth}}

/* ---- RSS subscribe link (Writing page) ---- */
.rss-sub{margin-top:14px}
.rss-sub a{display:inline-flex;align-items:center;gap:8px;font-family:var(--mono);font-size:13px;color:var(--ink-soft);border:1px solid var(--line-strong);border-radius:999px;padding:7px 14px;transition:border-color .2s,color .2s}
.rss-sub a:hover{border-color:var(--accent);color:var(--accent)}
.rss-sub svg{width:15px;height:15px;color:#ee802f}