/* Shared styles for meshahid.ai subpages (blog hub, research pages). Mirrors the homepage tokens. */
:root{
  --ink:#070B14; --panel:#0D1424; --line:#1C2740; --fg:#E7ECF5; --muted:#8C99B3; --signal:#6CB8FF; --debt:#F0A95B; --map1:#6CB8FF; --map2:#3DD6C6;
  --display:"Bricolage Grotesque","Segoe UI",system-ui,sans-serif;
  --body:"IBM Plex Sans","Segoe UI",system-ui,sans-serif;
  --mono:"IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,monospace;
  --maxw:1180px; color-scheme:dark;
}
:root[data-theme="light"]{
  --ink:#F5F7FB; --panel:#FFFFFF; --line:#D9E1EE; --fg:#0E1726; --muted:#56637D; --signal:#1B66D1; --debt:#B8620E; --map1:#1D6FE0; --map2:#0E9F8E;
  color-scheme:light;
}
:root[data-theme="dark"]{color-scheme:dark}
.theme-btn{all:unset;box-sizing:border-box;cursor:pointer;display:inline-grid;place-items:center;width:36px;height:36px;border-radius:999px;border:1px solid var(--line);color:var(--muted);transition:color .15s,border-color .15s}
.theme-btn:hover{color:var(--fg);border-color:var(--signal)}
.theme-btn:focus-visible{outline:2px solid var(--signal);outline-offset:3px}
.theme-btn svg{width:17px;height:17px}
.theme-btn .sun{display:none}
:root[data-theme="light"] .theme-btn .sun{display:block}
:root[data-theme="light"] .theme-btn .moon{display:none}
.top-actions{display:flex;align-items:center;gap:10px}
html.theme-anim *,html.theme-anim *::before,html.theme-anim *::after{transition:background-color .3s,color .3s,border-color .3s!important}
*{box-sizing:border-box}
html{background:var(--ink);scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
body{margin:0;background:var(--ink);color:var(--fg);font:16px/1.7 var(--body);-webkit-font-smoothing:antialiased;overflow-x:hidden}
a{color:var(--signal);text-decoration:none}
a:hover{text-decoration:underline;text-underline-offset:3px}
:focus-visible{outline:2px solid var(--signal);outline-offset:3px;border-radius:4px}
.wrap{max-width:var(--maxw);margin:0 auto;padding-inline:clamp(16px,4vw,40px)}
.narrow{max-width:760px}
h1,h2,h3{font-family:var(--display);font-weight:600;letter-spacing:-.02em;text-wrap:balance;margin:0}
p{margin:0}
.eyebrow{font:500 12px/1.4 var(--mono);letter-spacing:.14em;text-transform:uppercase;color:var(--muted)}
.eyebrow b{color:var(--signal);font-weight:500}
.eyebrow.debt b{color:var(--debt)}

header.top{position:sticky;top:env(safe-area-inset-top,0px);z-index:20;background:color-mix(in srgb,var(--ink) 82%,transparent);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.top .wrap{display:flex;align-items:center;justify-content:space-between;gap:20px;height:60px}
.brand{font:600 15px/1 var(--mono);color:var(--fg);white-space:nowrap}
.brand .bw span{color:var(--signal)}.brand{display:inline-flex;align-items:center;gap:10px}.brand-mark{flex:none;display:block}
.tagline{letter-spacing:.14em;text-transform:uppercase}

.brand:hover{text-decoration:none}
nav.links{display:flex;gap:22px;min-width:0}
nav.links a{font:500 13px/1 var(--body);color:var(--muted);white-space:nowrap;padding-block:6px}
nav.links a:hover,nav.links a[aria-current="page"]{color:var(--fg);text-decoration:none}
.cta-sm{font:500 13px/1 var(--body);color:var(--ink);background:var(--fg);padding:9px 14px;border-radius:999px;white-space:nowrap}
.cta-sm:hover{text-decoration:none;background:var(--signal)}
@media (max-width:820px){nav.links{display:none}}

.pagehead{padding-block:clamp(56px,8vw,104px) clamp(36px,5vw,56px);border-bottom:1px solid var(--line);background:radial-gradient(80% 120% at 85% 0%,color-mix(in srgb,var(--signal) 10%,transparent),transparent 60%)}
.pagehead h1{font-size:clamp(38px,6vw,72px);line-height:1.02;font-weight:800;letter-spacing:-.035em;margin-top:18px}
.pagehead .lede{font-size:clamp(17px,1.6vw,20px);color:var(--muted);max-width:62ch;margin-top:20px}
.chips{display:flex;flex-wrap:wrap;gap:8px;margin-top:26px}
.chip{font:500 11px/1 var(--mono);letter-spacing:.08em;text-transform:uppercase;padding:8px 11px;border:1px solid var(--line);border-radius:999px;color:var(--muted)}
.chip.live{color:var(--signal);border-color:color-mix(in srgb,var(--signal) 45%,var(--line))}
.chip.warm{color:var(--debt);border-color:color-mix(in srgb,var(--debt) 45%,var(--line))}

/* article layout: sticky contents + prose */
.doc{display:grid;grid-template-columns:220px minmax(0,1fr);gap:56px;padding-block:56px 96px}
.toc{position:sticky;top:calc(env(safe-area-inset-top,0px) + 84px);align-self:start;font-size:14px}
.toc .eyebrow{margin-bottom:12px}
.toc ol{list-style:none;margin:0;padding:0;display:grid;gap:8px;border-left:1px solid var(--line)}
.toc a{display:block;padding-left:14px;color:var(--muted)}
.toc a:hover{color:var(--fg);text-decoration:none}
@media (max-width:900px){.doc{grid-template-columns:1fr;gap:28px}.toc{position:static}}
.prose{min-width:0;max-width:72ch}
.prose section{padding-top:8px;margin-bottom:56px;scroll-margin-top:84px}
.prose h2{font-size:clamp(26px,3vw,34px);line-height:1.15;margin-bottom:18px}
.prose h3{font-size:19px;margin-bottom:6px}
.prose p{color:color-mix(in srgb,var(--fg) 82%,var(--muted));margin-bottom:16px}
.prose p strong{color:var(--fg);font-weight:500}
.prose ul.dash{list-style:none;margin:0 0 16px;padding:0;display:grid;gap:10px}
.prose ul.dash li{padding-left:22px;position:relative;color:color-mix(in srgb,var(--fg) 82%,var(--muted))}
.prose ul.dash li::before{content:"";position:absolute;left:0;top:.8em;width:10px;height:1px;background:var(--signal)}

.definition{background:var(--panel);border:1px solid var(--line);border-radius:16px;padding:clamp(22px,3.5vw,36px);margin-bottom:16px}
.definition .term{font:500 12px/1 var(--mono);letter-spacing:.14em;color:var(--debt);text-transform:uppercase}
.definition blockquote{margin:16px 0 0;font:500 clamp(19px,2.1vw,24px)/1.4 var(--display)}
.definition blockquote mark{background:none;color:var(--debt)}
.definition .src{margin-top:16px;font-size:14px;color:var(--muted)}

.grid2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;margin-bottom:16px}
.grid2 > div{border:1px solid var(--line);border-radius:12px;padding:18px 20px;background:var(--ink)}
.grid2 p{font-size:15px;margin:0;color:var(--muted)}
@media (max-width:640px){.grid2{grid-template-columns:1fr}}

.layers{display:grid;gap:10px;margin-bottom:16px}
.layer{display:grid;grid-template-columns:52px minmax(0,1fr);gap:16px;border:1px solid var(--line);border-radius:12px;padding:18px 20px;background:var(--ink)}
.layer .ix{font:500 13px/1.6 var(--mono);color:var(--signal)}
.layer h3{font-size:20px}
.layer .q{font:500 13px/1.5 var(--mono);color:var(--muted);margin:4px 0 10px}
.layer p{font-size:15px;margin:0}

.timeline{list-style:none;margin:0;padding:0;border-left:1px solid var(--line)}
.timeline li{position:relative;padding:0 0 22px 24px}
.timeline li::before{content:"";position:absolute;left:-5px;top:.55em;width:9px;height:9px;border-radius:50%;background:var(--ink);border:1px solid var(--signal)}
.timeline li.done::before{background:var(--signal)}
.timeline .when{font:500 12px/1.4 var(--mono);color:var(--muted);letter-spacing:.06em;text-transform:uppercase}
.timeline .what{color:var(--fg)}

.cite{background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:18px 20px}
.cite pre{margin:0;white-space:pre-wrap;word-break:break-word;font:400 13px/1.6 var(--mono);color:var(--fg)}
.cite .row{display:flex;justify-content:space-between;align-items:center;gap:12px;margin-bottom:10px}
.copy{all:unset;cursor:pointer;font:500 11px/1 var(--mono);letter-spacing:.08em;text-transform:uppercase;color:var(--signal)}
.copy:focus-visible{outline:2px solid var(--signal);outline-offset:3px}

/* cards used by the writing hub and related links */
.cards{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px}
.card{display:flex;flex-direction:column;gap:12px;background:var(--panel);border:1px solid var(--line);border-radius:16px;padding:26px;color:var(--fg);transition:border-color .2s}
a.card:hover{text-decoration:none;border-color:var(--signal)}
.card .k{font:500 11px/1 var(--mono);letter-spacing:.12em;text-transform:uppercase;color:var(--signal)}
.card .k.warm{color:var(--debt)}
.card h3{font-size:22px;line-height:1.25}
.card p{color:var(--muted);font-size:15px}
.card .go{margin-top:auto;font:500 13px/1 var(--mono);color:var(--signal)}
@media (max-width:820px){.cards{grid-template-columns:1fr}}

.posts{list-style:none;margin:0;padding:0;border-top:1px solid var(--line)}
.posts li{border-bottom:1px solid var(--line)}
.posts a{display:grid;grid-template-columns:120px minmax(0,1fr) auto;gap:24px;align-items:baseline;padding-block:22px;color:var(--fg)}
.posts a:hover{text-decoration:none}
.posts a:hover h3{color:var(--signal)}
.posts time{font:500 12px/1.5 var(--mono);color:var(--muted);font-variant-numeric:tabular-nums}
.posts h3{font-size:20px;line-height:1.3;transition:color .15s}
.posts p{color:var(--muted);font-size:15px;margin-top:6px}
.posts .arrow{font:500 13px/1 var(--mono);color:var(--muted)}
@media (max-width:640px){.posts a{grid-template-columns:1fr;gap:6px}.posts .arrow{display:none}}
.feednote{font:400 12px/1.5 var(--mono);color:var(--muted);margin-top:14px}

section.block{padding-block:clamp(56px,8vw,96px);border-bottom:1px solid var(--line)}
.sec-head{display:flex;flex-wrap:wrap;justify-content:space-between;align-items:end;gap:20px;margin-bottom:32px}
.sec-head h2{font-size:clamp(28px,3.6vw,42px);margin-top:12px}
.btn{display:inline-flex;align-items:center;gap:10px;font:500 15px/1 var(--body);padding:14px 20px;border-radius:999px;border:1px solid var(--line);color:var(--fg);background:var(--panel)}
.btn:hover{text-decoration:none;border-color:var(--signal)}
.btn.primary{background:var(--signal);color:var(--ink);border-color:var(--signal)}
.btn.primary:hover{background:var(--fg);border-color:var(--fg)}

footer{padding-block:28px;font:400 12px/1.5 var(--mono);color:var(--muted)}
footer .wrap{display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px}

/* menu + footer (shared with homepage) */
.menu-btn{all:unset;box-sizing:border-box;cursor:pointer;display:none;width:36px;height:36px;border-radius:999px;border:1px solid var(--line);position:relative}
.menu-btn span{position:absolute;left:10px;right:10px;height:1.6px;background:var(--fg);border-radius:2px;transition:transform .2s,top .2s}
.menu-btn span:first-child{top:13px}.menu-btn span:last-child{top:21px}
.menu-btn[aria-expanded="true"] span:first-child{top:17px;transform:rotate(45deg)}
.menu-btn[aria-expanded="true"] span:last-child{top:17px;transform:rotate(-45deg)}
.menu-btn:focus-visible{outline:2px solid var(--signal);outline-offset:3px}
.mnav{border-top:1px solid var(--line);background:var(--ink);padding:8px clamp(16px,4vw,40px) 20px}
.mnav a{display:block;padding:14px 2px;border-bottom:1px solid var(--line);color:var(--fg);font:500 17px/1.2 var(--display)}
.mnav a:hover{text-decoration:none;color:var(--signal)}
.mnav .btn{margin-top:18px;display:flex;justify-content:center;border-bottom:1px solid var(--signal);color:var(--ink)}
@media (max-width:820px){.menu-btn{display:inline-block}}
@media (min-width:821px){.mnav{display:none!important}}
@media (max-width:440px){.top-actions .cta-sm{display:none}}
footer.site .wrap{display:block}
footer.site{border-top:1px solid var(--line);padding-block:48px 28px;font:400 14px/1.6 var(--body);color:var(--muted)}
footer.site .fgrid{display:grid;grid-template-columns:minmax(0,1.4fr) repeat(2,minmax(0,.8fr));gap:32px}
@media (max-width:720px){footer.site .fgrid{grid-template-columns:1fr 1fr}footer.site .fbrand{grid-column:1/-1}}
footer.site .fbrand .brand{font-size:16px}
footer.site .fbrand p{margin-top:12px;max-width:40ch}
footer.site .tagline{font:500 12px/1 var(--mono);letter-spacing:.16em;color:var(--fg);display:block;margin-top:14px}
footer.site h4{font:500 12px/1 var(--mono);letter-spacing:.12em;text-transform:uppercase;color:var(--fg);margin:4px 0 14px}
footer.site ul{list-style:none;margin:0;padding:0;display:grid;gap:8px}
footer.site ul a{color:var(--muted)}footer.site ul a:hover{color:var(--fg)}
footer.site .fbottom{margin-top:40px;padding-top:20px;border-top:1px solid var(--line);display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px;font:400 12.5px/1.5 var(--mono)}