/* ============================================================
   site.css — Pranjal Pareek · "Systems Ledger" design system
   THE single shared stylesheet. Editing this can affect every
   page, so change deliberately (see context.md §4.5, §8).
   Everything else on the site is isolated per-file.
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Newsreader:ital,opsz,wght@0,6..72,400;0,6..72,500;0,6..72,600;1,6..72,400;1,6..72,500&family=IBM+Plex+Mono:wght@400;500;600&display=swap');

/* ---------- 1. Design tokens ---------- */
:root{
  --paper:#0e1012;      /* page background (near-black) */
  --panel:#14171a;      /* raised surfaces / cards */
  --panel2:#181c20;     /* nested / hover surface */
  --ink:#e8e6e0;        /* primary text */
  --dim:#8a8d8f;        /* secondary text */
  --faint:#5c6062;      /* tertiary / captions / placeholder */
  --line:#232729;       /* hairline dividers */
  --line2:#2e3336;      /* stronger border */
  --accent:#4ade9e;     /* mint — signature accent */
  --accent-dim:#173a2c; /* accent wash / chips */
  --accent-glow:rgba(74,222,158,.5);
  --warn:#e0b04a;       /* amber — patents only */
  --steel:#7fb0d9;      /* steel-blue — "materials" pole of the arc */
  --maxw:1080px;
  --pad:32px;
}

/* ---------- 2. Reset & base ---------- */
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  background:var(--paper);color:var(--ink);
  font-family:'IBM Plex Mono',ui-monospace,monospace;
  font-size:14px;line-height:1.6;-webkit-font-smoothing:antialiased;
  overflow-wrap:break-word;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;height:auto;display:block}
.serif{font-family:'Newsreader',Georgia,serif}
.wrap{max-width:var(--maxw);margin-inline:auto;padding-inline:var(--pad)}
:where(a,button,[tabindex]):focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:2px}

/* ---------- 3. Top bar + primary nav ---------- */
.bar{position:sticky;top:0;z-index:50;background:rgba(14,16,18,.85);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.bar .wrap{display:flex;align-items:center;justify-content:space-between;height:56px}
.brand{font-weight:600;letter-spacing:.02em}
.brand .dot{color:var(--accent)}
.nav{display:flex;align-items:center}
.nav a{color:var(--dim);font-size:12.5px;margin-left:24px;transition:color .15s}
.nav a:hover,.nav a[aria-current="page"]{color:var(--ink)}
.nav-toggle{display:none;background:none;border:1px solid var(--line);color:var(--ink);font:inherit;font-size:12px;padding:6px 12px;border-radius:2px;cursor:pointer}
@media(max-width:640px){
  .nav{position:fixed;inset:56px 0 auto 0;flex-direction:column;align-items:flex-start;gap:2px;
    background:var(--panel);border-bottom:1px solid var(--line);padding:14px var(--pad) 20px;
    transform:translateY(-120%);transition:transform .25s ease;box-shadow:0 12px 30px rgba(0,0,0,.4)}
  .nav[data-open="true"]{transform:translateY(0)}
  .nav a{margin-left:0;font-size:15px;padding:8px 0}
  .nav-toggle{display:inline-block}
}

/* ---------- 4. Breadcrumb (deep-link spine) ---------- */
.crumbs{display:flex;flex-wrap:wrap;gap:8px;align-items:center;font-size:12px;color:var(--dim);padding:26px 0 4px}
.crumbs a{color:var(--dim);border-bottom:1px solid transparent;transition:border-color .15s}
.crumbs a:hover{border-color:var(--accent);color:var(--ink)}
.crumbs span[aria-current="page"]{color:var(--accent)}
.crumbs > span{color:var(--faint)}

/* ---------- 5. Section header (numbered ledger device) ---------- */
.shead{display:flex;align-items:baseline;gap:14px;padding:64px 0 20px}
.shead .idx{font-size:12px;color:var(--accent);font-weight:600}
.shead h2{font-size:13px;text-transform:uppercase;letter-spacing:.14em;color:var(--dim);font-weight:600}
.shead .rule{flex:1;height:1px;background:var(--line)}
.sintro{color:var(--dim);font-size:13.5px;max-width:64ch;margin-bottom:8px;line-height:1.7}

/* ---------- 6. Page header (hubs / spokes / posts) ---------- */
.page-head{padding:20px 0 8px}
.kicker{font-size:12px;letter-spacing:.14em;text-transform:uppercase;color:var(--accent);font-weight:600;margin-bottom:18px}
.page-head h1{font-family:'Newsreader',serif;font-weight:500;font-size:clamp(34px,5.4vw,58px);line-height:1.05;letter-spacing:-.02em;margin-bottom:20px}
.page-head h1 em{font-style:italic;color:var(--accent)}
.dek{max-width:60ch;color:var(--dim);font-size:16px;line-height:1.7}
.dek b{color:var(--ink);font-weight:500}
.head-org{display:inline-flex;align-items:center;gap:10px;margin-top:22px;font-size:13px;color:var(--dim)}
.head-org img{width:26px;height:26px;border-radius:5px;background:#fff;padding:3px;object-fit:contain}
.head-org .co{color:var(--ink)}

/* ---------- 7. Metric strip / at-a-glance ---------- */
.metrics{display:grid;grid-template-columns:repeat(4,1fr);border:1px solid var(--line);margin-top:28px}
.metrics.glance{grid-template-columns:repeat(3,1fr)}
.metric{padding:22px 20px;border-right:1px solid var(--line)}
.metric:last-child{border-right:none}
.metric .n{font-family:'Newsreader',serif;font-size:32px;color:var(--ink);line-height:1}
.metric .n .u{color:var(--accent);font-size:22px}
.metric .l{font-size:11px;color:var(--dim);margin-top:8px;text-transform:uppercase;letter-spacing:.08em;line-height:1.4}
@media(max-width:720px){
  .metrics{grid-template-columns:repeat(2,1fr)}
  .metric:nth-child(2n){border-right:none}
  .metric:nth-child(1),.metric:nth-child(2){border-bottom:1px solid var(--line)}
  .metrics.glance .metric:nth-child(3){border-right:none;border-bottom:none}
}

/* ---------- 8. Hero (homepage) ---------- */
.hero{padding:80px 0 60px;border-bottom:1px solid var(--line);display:grid;grid-template-columns:1fr 250px;gap:56px;align-items:center}
.status{display:inline-flex;align-items:center;gap:8px;font-size:12px;color:var(--dim);border:1px solid var(--line);border-radius:2px;padding:5px 10px;margin-bottom:26px}
.status .led{width:7px;height:7px;border-radius:50%;background:var(--accent);box-shadow:0 0 8px var(--accent);animation:blink 2.4s infinite}
@keyframes blink{0%,100%{opacity:1}50%{opacity:.4}}
.hero h1{font-family:'Newsreader',serif;font-weight:500;font-size:clamp(38px,5.6vw,62px);line-height:1.04;letter-spacing:-.02em;margin-bottom:22px}
.hero h1 em{font-style:italic;color:var(--accent)}
.lede{max-width:600px;color:var(--dim);font-size:15px;line-height:1.75}
.lede b{color:var(--ink);font-weight:500}

/* portrait placeholder */
.portrait{position:relative;width:250px;height:300px;border:1px solid var(--line2);border-radius:3px;background:radial-gradient(120% 90% at 50% 0%, #1b1f22 0%, #101315 70%);overflow:hidden}
.portrait img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.portrait .grid{position:absolute;inset:0;background-image:linear-gradient(var(--line) 1px,transparent 1px),linear-gradient(90deg,var(--line) 1px,transparent 1px);background-size:25px 25px;opacity:.35}
.portrait .frame{position:absolute;inset:14px;border:1px dashed var(--line2);border-radius:2px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px}
.portrait .silh{width:74px;height:74px;border-radius:50%;background:linear-gradient(160deg,var(--accent-dim),#191d20);border:1px solid var(--accent-dim);position:relative}
.portrait .silh::before{content:"";position:absolute;top:16px;left:50%;transform:translateX(-50%);width:26px;height:26px;border-radius:50%;background:var(--faint)}
.portrait .silh::after{content:"";position:absolute;bottom:8px;left:50%;transform:translateX(-50%);width:46px;height:26px;border-radius:24px 24px 0 0;background:var(--faint)}
.portrait .cap{font-size:10px;letter-spacing:.16em;text-transform:uppercase;color:var(--faint);text-align:center}
.portrait .corner{position:absolute;width:9px;height:9px;border:1px solid var(--accent)}
.portrait .c1{top:7px;left:7px;border-right:none;border-bottom:none}
.portrait .c2{top:7px;right:7px;border-left:none;border-bottom:none}
.portrait .c3{bottom:7px;left:7px;border-right:none;border-top:none}
.portrait .c4{bottom:7px;right:7px;border-left:none;border-top:none}
.portrait .tag{position:absolute;bottom:0;left:0;right:0;font-size:9px;letter-spacing:.12em;color:var(--dim);padding:7px 10px;border-top:1px solid var(--line);background:rgba(14,16,18,.6);display:flex;justify-content:space-between}
@media(max-width:820px){.hero{grid-template-columns:1fr;gap:40px}.portrait{order:-1;width:200px;height:240px}}

/* ---------- 9. Career arc (load path) ---------- */
.arc{border:1px solid var(--line);padding:34px 30px 30px;background:linear-gradient(180deg,var(--panel),var(--paper))}
.arc .track{display:grid;grid-template-columns:repeat(4,1fr);position:relative;margin-top:8px}
.node{padding:0 14px;position:relative}
.node::before{content:"";position:absolute;top:8px;left:0;right:0;height:2px;background:linear-gradient(90deg,var(--steel),var(--accent))}
.node:first-child::before{left:50%}
.node:last-child::before{right:50%;background:var(--accent)}
.node .pt{width:14px;height:14px;border-radius:50%;background:var(--paper);border:2px solid var(--steel);position:relative;z-index:2;margin:0 auto}
.node:nth-child(2) .pt{border-color:#9ac4e0}
.node:nth-child(3) .pt{border-color:#6fd6b0}
.node:last-child .pt{background:var(--accent);border-color:var(--accent);box-shadow:0 0 12px var(--accent-glow)}
.node .yr{font-size:11px;color:var(--dim);text-align:center;margin-top:14px}
.node .mat{text-align:center;font-family:'Newsreader',serif;font-size:20px;margin-top:4px;color:var(--ink)}
.node .d{text-align:center;font-size:11.5px;color:var(--dim);margin-top:6px;line-height:1.45}
.arc .caption{margin-top:24px;padding-top:18px;border-top:1px dashed var(--line2);font-size:12.5px;color:var(--faint);text-align:center;font-style:italic;font-family:'Newsreader',serif}
@media(max-width:640px){
  .arc .track{grid-template-columns:1fr}
  .node{padding:0 0 22px 22px;border-left:2px solid var(--steel)}
  .node:last-child{border-left:2px solid var(--accent);padding-bottom:0}
  .node::before{display:none}
  .node .pt{position:absolute;left:-8px;top:0;margin:0}
  .node .yr,.node .mat,.node .d{text-align:left}
}

/* ---------- 10. Ledger rows (experience list) ---------- */
.row{display:grid;grid-template-columns:150px 1fr;gap:28px;padding:28px 0;border-bottom:1px solid var(--line)}
.row .when{color:var(--dim);font-size:12px}
.row .when .logo{display:inline-flex;align-items:center;gap:8px;margin-top:8px}
.row .when .logo img{width:22px;height:22px;border-radius:4px;background:#fff;padding:2px;object-fit:contain}
.row .when .logo .co{color:var(--ink);font-weight:500;font-size:13px;border-bottom:1px solid transparent;transition:border-color .15s}
.row .when .logo:hover .co{border-color:var(--accent)}
.row h3{font-family:'Newsreader',serif;font-size:23px;font-weight:500;margin-bottom:4px}
.row h3 a{border-bottom:1px solid var(--line2);transition:border-color .15s}
.row h3 a:hover{border-color:var(--accent)}
.row .meta{color:var(--dim);font-size:12px;margin-bottom:16px}
.out{display:flex;flex-direction:column;gap:10px;max-width:660px}
.out .li{display:grid;grid-template-columns:82px 1fr;gap:14px;align-items:start;font-size:13.5px;color:#c3c5c4}
.out .delta{color:var(--accent);font-weight:600;white-space:nowrap;font-variant-numeric:tabular-nums;text-align:right}
.tag{display:inline-flex;align-items:center;gap:6px;font-size:11px;color:var(--accent);border:1px solid var(--accent-dim);background:var(--accent-dim);border-radius:2px;padding:3px 9px;margin-top:16px;transition:background .15s}
.tag:hover{background:#1d4835}
@media(max-width:640px){.row{grid-template-columns:1fr;gap:12px}}

/* ---------- 11. Impact bar chart ---------- */
.impact{border:1px solid var(--line);padding:30px;background:var(--panel)}
.impact .chartrow{display:grid;grid-template-columns:150px 1fr 92px;gap:16px;align-items:center;padding:13px 0;border-bottom:1px solid var(--line)}
.impact .chartrow:last-child{border-bottom:none}
.impact .clabel{font-size:12.5px;color:#c3c5c4}
.impact .clabel span{display:block;font-size:10.5px;color:var(--faint);margin-top:2px}
.impact .barwrap{height:16px;background:#1a1e21;border-radius:2px;overflow:hidden;position:relative}
.impact .bar{height:100%;background:linear-gradient(90deg,var(--accent-dim),var(--accent));border-radius:2px;width:0;transition:width 1.2s cubic-bezier(.2,.7,.3,1)}
.impact .cval{font-family:'Newsreader',serif;font-size:20px;color:var(--accent);text-align:right}
@media(max-width:560px){
  .impact .chartrow{grid-template-columns:1fr 70px}
  .impact .barwrap{grid-column:1/-1;order:3}
}

/* ---------- 12. Cards grids (patents / making / institutions) ---------- */
.pgrid{display:grid;grid-template-columns:1fr 1fr;gap:1px;background:var(--line);border:1px solid var(--line)}
.pcard{background:var(--paper);padding:24px;transition:background .15s}
.pcard:hover{background:var(--panel)}
.pcard .pn{font-size:11px;color:var(--warn);letter-spacing:.1em;margin-bottom:10px;display:flex;justify-content:space-between}
.pcard .pn .ic{color:var(--faint)}
.pcard h4{font-family:'Newsreader',serif;font-size:19px;font-weight:500;margin-bottom:8px;line-height:1.3}
.pcard p{font-size:12.5px;color:var(--dim)}
@media(max-width:640px){.pgrid{grid-template-columns:1fr}}

.making{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.make{border:1px solid var(--line);background:var(--panel);padding:22px;transition:border-color .15s}
.make:hover{border-color:var(--accent-dim)}
.make .yr{font-size:11px;color:var(--faint);letter-spacing:.1em;margin-bottom:12px}
.make .glyph{height:44px;margin-bottom:16px;color:var(--steel)}
.make h4{font-family:'Newsreader',serif;font-size:18px;font-weight:500;margin-bottom:8px;line-height:1.25}
.make p{font-size:12.5px;color:var(--dim);line-height:1.6;margin-bottom:12px}
.make .link{font-size:11.5px;color:var(--accent)}
@media(max-width:720px){.making{grid-template-columns:1fr}}

.insts{display:flex;flex-wrap:wrap;gap:12px}
.inst{flex:1;min-width:200px;border:1px solid var(--line);background:var(--panel);padding:20px;display:flex;gap:14px;align-items:flex-start;transition:border-color .15s}
.inst:hover{border-color:var(--steel)}
.inst img{width:40px;height:40px;border-radius:6px;background:#fff;padding:4px;object-fit:contain;flex-shrink:0}
.inst .deg{font-family:'Newsreader',serif;font-size:18px;font-weight:500}
.inst .sch{font-size:12px;color:var(--steel);margin:2px 0 6px}
.inst p{font-size:11.5px;color:var(--dim);line-height:1.5}

/* ---------- 13. Spoke list (hub → initiatives) ---------- */
.spoke-list{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-top:20px}
.spoke-card{display:flex;flex-direction:column;gap:8px;border:1px solid var(--line);background:var(--panel);padding:24px;transition:transform .18s,border-color .18s}
.spoke-card:hover{transform:translateY(-3px);border-color:var(--accent-dim)}
.spoke-card .sk{font-size:11px;letter-spacing:.1em;text-transform:uppercase;color:var(--faint)}
.spoke-card .st{font-family:'Newsreader',serif;font-size:22px;font-weight:500;line-height:1.2}
.spoke-card .so{font-size:13px;color:var(--dim);line-height:1.55}
.spoke-card .chip{align-self:flex-start;margin-top:4px;font-size:11px;color:var(--accent);border:1px solid var(--accent-dim);background:var(--accent-dim);border-radius:2px;padding:2px 9px;font-variant-numeric:tabular-nums}
.spoke-card .go{margin-top:auto;padding-top:10px;font-size:12px;color:var(--accent)}
@media(max-width:640px){.spoke-list{grid-template-columns:1fr}}

/* ---------- 14. Prose (article / spoke / post body) ---------- */
.prose{max-width:66ch;margin-top:28px}
.prose > * + *{margin-top:20px}
.prose p{color:#c9cbc9;font-size:15px;line-height:1.78}
.prose h2{font-family:'Newsreader',serif;font-weight:500;font-size:26px;line-height:1.2;letter-spacing:-.01em;margin-top:44px;padding-top:24px;border-top:1px solid var(--line)}
.prose h3{font-family:'Newsreader',serif;font-weight:500;font-size:20px;margin-top:32px}
.prose a{color:var(--accent);border-bottom:1px solid var(--accent-dim);transition:border-color .15s}
.prose a:hover{border-color:var(--accent)}
.prose strong{color:var(--ink);font-weight:600}
.prose ul,.prose ol{padding-left:22px;color:#c9cbc9;font-size:15px;line-height:1.7}
.prose li + li{margin-top:8px}
.prose ul li::marker{color:var(--accent)}
.prose blockquote{border-left:2px solid var(--accent);padding:6px 0 6px 22px;margin-left:0;font-family:'Newsreader',serif;font-style:italic;font-size:21px;line-height:1.4;color:var(--ink)}
.prose code{font-family:'IBM Plex Mono';font-size:.9em;background:var(--panel);border:1px solid var(--line);border-radius:3px;padding:1px 6px;color:var(--steel)}
.prose figure{margin:8px 0}
.prose figcaption{font-size:12px;color:var(--faint);margin-top:8px}
.prose .lead{font-size:18px;color:var(--ink);line-height:1.7}

/* pull quote (standalone band) */
.pullquote{margin:48px 0;padding:36px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line);text-align:center}
.pullquote p{font-family:'Newsreader',serif;font-weight:500;font-size:clamp(22px,3.2vw,32px);line-height:1.2;letter-spacing:-.01em;max-width:22ch;margin-inline:auto}
.pullquote p em{font-style:italic;color:var(--accent)}
.pullquote .who{margin-top:18px;font-size:12px;letter-spacing:.14em;text-transform:uppercase;color:var(--faint)}

/* ---------- 15. Writing / field-notes list ---------- */
.post-list{border-top:1px solid var(--line);margin-top:20px}
.post-row{display:grid;grid-template-columns:120px 1fr;gap:24px;padding:22px 0;border-bottom:1px solid var(--line);transition:padding-left .18s}
.post-row:hover{padding-left:10px}
.post-row .pm{font-size:11.5px;color:var(--faint);line-height:1.6}
.post-row .pm .ptag{display:inline-block;color:var(--accent);border:1px solid var(--accent-dim);border-radius:2px;padding:1px 7px;margin-bottom:8px;letter-spacing:.06em}
.post-row .pt{font-family:'Newsreader',serif;font-size:22px;font-weight:500;line-height:1.2;margin-bottom:6px}
.post-row .pd{font-size:13px;color:var(--dim);line-height:1.6;max-width:60ch}
.post-row:hover .pt{color:var(--accent)}
@media(max-width:640px){.post-row{grid-template-columns:1fr;gap:8px}}

/* article byline */
.byline{display:flex;flex-wrap:wrap;gap:16px;font-size:12.5px;color:var(--dim);margin-top:18px;padding-top:16px;border-top:1px solid var(--line)}
.byline .ptag{color:var(--accent);border:1px solid var(--accent-dim);border-radius:2px;padding:1px 8px;letter-spacing:.06em}

/* ---------- 16. "Unfold" next-steps (deep-link engine) ---------- */
.unfold{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:14px;margin-top:56px;padding-top:32px;border-top:1px solid var(--line)}
.unfold-card{display:flex;flex-direction:column;gap:8px;border:1px solid var(--line);background:var(--panel);padding:22px;transition:transform .18s,border-color .18s}
.unfold-card:hover{transform:translateY(-3px);border-color:var(--accent)}
.unfold-card .k{font-size:11px;letter-spacing:.1em;text-transform:uppercase;color:var(--accent)}
.unfold-card .t{font-family:'Newsreader',serif;font-size:19px;font-weight:500;line-height:1.25;color:var(--ink)}
.unfold-card .t::after{content:" →";color:var(--accent);font-family:'IBM Plex Mono';font-size:14px}

/* ---------- 17. Footer ---------- */
.site-foot{padding:56px 0 72px;border-top:1px solid var(--line);margin-top:56px}
.site-foot .cta{font-family:'Newsreader',serif;font-size:clamp(22px,3.2vw,32px);font-weight:500;margin-bottom:28px;max-width:22ch}
.site-foot .cta em{font-style:italic;color:var(--accent)}
.site-foot .base{display:flex;justify-content:space-between;flex-wrap:wrap;gap:16px;color:var(--dim);font-size:12px}
.site-foot .base a{color:var(--accent)}

/* ---------- 18. Reduced motion ---------- */
@media (prefers-reduced-motion: reduce){
  *{animation:none!important;transition:none!important;scroll-behavior:auto!important}
  .impact .bar{width:var(--w,60%)!important} /* JS sets --w as fallback end-state */
}