/* ══════════════════════════════════════════════════════════════
   research.pranaymahendrakar.com
   Layered on top of site.css — tokens, backdrop, nav, .p panels
   and .wrap all come from there. Everything below is the paper
   vocabulary this subdomain adds.
   ══════════════════════════════════════════════════════════════ */

/* The research subdomain leans cyan where the main site leans violet,
   so the two read as siblings rather than copies. */
:root{ --accent:var(--cyan); }

.logo-sub{color:var(--cyan);font-weight:700}

section.pt-0{padding-top:0}

/* ══════════ HERO ══════════ */
.hero-r{padding-block:clamp(56px,8vw,104px) clamp(34px,4vw,54px)}
.hero-t{font-size:clamp(38px,7.2vw,76px);font-weight:700;letter-spacing:-.04em;line-height:1.02;
  background:linear-gradient(150deg,#fff 18%,var(--cyan) 96%);
  -webkit-background-clip:text;background-clip:text;color:transparent}
.hero-r .sub{margin-top:24px;font-size:17.5px;max-width:62ch}

.stats{display:flex;flex-wrap:wrap;gap:clamp(22px,5vw,62px);margin-top:clamp(34px,4.5vw,52px);
  padding-top:30px;border-top:1px solid var(--line)}
.stats li{display:flex;flex-direction:column;gap:7px}
.stats b{font-family:var(--disp);font-size:clamp(24px,3.4vw,36px);font-weight:900;line-height:1;
  font-variant-numeric:tabular-nums;
  background:linear-gradient(160deg,#fff,var(--cyan));-webkit-background-clip:text;background-clip:text;color:transparent}
.stats span{font-family:var(--mono);font-size:10.5px;letter-spacing:.15em;text-transform:uppercase;color:var(--fg-3)}

/* ══════════ FILTER BAR ══════════ */
.pfilters{display:flex;flex-direction:column;gap:16px;margin-bottom:30px;
  padding-bottom:26px;border-bottom:1px solid var(--line)}

.fx-search{display:flex;align-items:center;gap:11px;max-width:440px;width:100%;
  padding:0 16px;height:46px;border:1px solid var(--line);border-radius:999px;
  background:var(--panel);color:var(--fg-3);transition:.22s var(--ease)}
.fx-search:focus-within{border-color:var(--cyan);color:var(--cyan);
  box-shadow:0 0 24px rgba(34,211,238,.18)}
.fx-search svg{flex:none}
.fx-search input{flex:1;min-width:0;background:none;border:none;outline:none;
  font-family:var(--sans);font-size:14.5px;color:var(--fg);height:100%}
.fx-search input::placeholder{color:var(--fg-3)}
.fx-search input::-webkit-search-cancel-button{-webkit-appearance:none;appearance:none}

.fx-row{display:flex;flex-wrap:wrap;gap:8px}
.fchip{display:inline-flex;align-items:center;gap:8px;padding:8px 15px;border-radius:999px;
  font-family:var(--mono);font-size:12px;color:var(--fg-2);
  border:1px solid var(--line);background:var(--panel);transition:.2s var(--ease);min-height:38px}
.fchip:hover{color:var(--fg);border-color:var(--line-2)}
.fchip.on{background:linear-gradient(96deg,var(--cyan),var(--violet));color:#05060A;
  border-color:transparent;font-weight:500}
.chip-n{font-size:10.5px;opacity:.7;font-variant-numeric:tabular-nums}
.fchip.on .chip-n{opacity:.85}

.fx-count{font-family:var(--mono);font-size:11.5px;letter-spacing:.08em;color:var(--fg-3);min-height:1em}
.fx-empty{margin-top:32px;font-size:15.5px;color:var(--fg-2)}
.fx-empty .lnk{margin:0 0 0 4px;vertical-align:baseline}

/* ══════════ PAPER CARDS ══════════ */
.grid-r{display:grid;grid-template-columns:repeat(auto-fill,minmax(330px,1fr));gap:14px}
@media(max-width:560px){.grid-r{grid-template-columns:1fr}}
.gi{display:contents}
.gi[hidden]{display:none}
.gi > .pc{height:100%}

.pc-meta{display:flex;align-items:center;gap:8px;font-family:var(--mono);font-size:11px;
  letter-spacing:.09em;text-transform:uppercase;color:var(--fg-3);margin-bottom:15px}
.pc-dot{opacity:.5}
.pc-kind{color:var(--violet)}

.p h3.pc-t{font-size:19px;line-height:1.32;font-weight:600;letter-spacing:-.015em}
.pc-t a{display:block;transition:color .2s}
.pc:hover .pc-t a{color:var(--cyan)}
.pc-x{margin-top:14px;font-size:14.5px;line-height:1.68;color:var(--fg-2)}

.pc-foot{display:flex;align-items:center;justify-content:space-between;gap:14px;
  margin-top:auto;padding-top:18px;border-top:1px solid var(--line)}
.pc-sm .pc-foot{margin-top:18px}

.pc-tags{display:flex;flex-wrap:wrap;gap:6px}
.pc-tags a{font-family:var(--mono);font-size:10px;letter-spacing:.12em;text-transform:uppercase;
  color:var(--fg-3);border:1px solid var(--line);border-radius:999px;padding:5px 11px;
  white-space:nowrap;transition:.2s}
.pc-tags a:hover{color:var(--cyan);border-color:var(--cyan)}

.pc-doi{font-family:var(--mono);font-size:10px;letter-spacing:.18em;color:var(--cyan);
  opacity:.62;flex:none}

/* ══════════ TOPIC CARDS ══════════ */
.grid-t{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:14px}
@media(max-width:560px){.grid-t{grid-template-columns:1fr}}
.topic-card{display:block}
.topic-card .p-in{gap:0}
.tc-n{font-family:var(--disp);font-size:32px;font-weight:900;line-height:1;color:var(--cyan);
  font-variant-numeric:tabular-nums;opacity:.85}
.tc-t{display:block;font-size:19px;font-weight:600;letter-spacing:-.02em;margin-top:16px;
  transition:color .2s}
.topic-card:hover .tc-t{color:var(--cyan)}
.tc-x{display:block;margin-top:11px;font-size:14px;line-height:1.66;color:var(--fg-2)}

/* ══════════ CRUMBS (ol variant) ══════════ */
.crumbs ol{display:flex;flex-wrap:wrap;gap:8px;align-items:center}
.crumbs li{display:flex;align-items:center;gap:8px}
.crumbs li + li::before{content:"/";color:var(--fg-3);opacity:.5}
.crumbs [aria-current]{color:var(--fg-2)}

/* ══════════ BUTTONS ══════════ */
/* site.css gives .btn its geometry but leaves the skin to the variant. */
.btn{border:1px solid var(--line-2);color:var(--fg);background:var(--panel)}
.btn:hover{transform:translateY(-2px);border-color:var(--cyan);color:var(--cyan)}
.btn-p{background:linear-gradient(96deg,var(--cyan),var(--violet));color:#05060A;font-weight:600;
  border-color:transparent;box-shadow:0 0 30px rgba(34,211,238,.3)}
.btn-p:hover{color:#05060A;border-color:transparent;box-shadow:0 0 46px rgba(34,211,238,.5)}
.btn-g{background:none;border-color:var(--line);color:var(--fg-2)}
.btn-g:hover{color:var(--cyan);border-color:var(--cyan)}
.btn-sm{padding:9px 17px;min-height:38px;font-size:12px}
.btn-sub{opacity:.62;font-size:11.5px}

/* ══════════ PAPER PAGE ══════════ */
.paper{padding-block:clamp(30px,4vw,48px) clamp(64px,8vw,104px)}

.pd-head{padding-bottom:clamp(28px,4vw,40px);border-bottom:1px solid var(--line)}
.pd-kicker{display:flex;flex-wrap:wrap;align-items:center;gap:9px;font-family:var(--mono);
  font-size:11.5px;letter-spacing:.1em;text-transform:uppercase;color:var(--fg-3)}
.pd-t{font-size:clamp(28px,4.4vw,50px);font-weight:700;letter-spacing:-.032em;line-height:1.1;
  margin-top:18px;max-width:22ch}

.pd-by{display:flex;align-items:center;gap:13px;margin-top:26px}
.pd-by img{width:44px;height:44px;border-radius:50%;object-fit:cover;object-position:50% 20%;
  border:1px solid var(--line-2);flex:none}
.pd-by b{display:block;font-size:15px;font-weight:600}
.orcid{display:inline-flex;align-items:center;gap:6px;font-family:var(--mono);font-size:11.5px;
  color:var(--fg-3);margin-top:3px;transition:color .2s}
.orcid:hover{color:var(--cyan)}
.orcid svg{flex:none;border-radius:50%}

.pd-tags{display:flex;flex-wrap:wrap;gap:7px;margin-top:24px}
.pd-tags a{font-family:var(--mono);font-size:11px;letter-spacing:.12em;text-transform:uppercase;
  color:var(--fg-2);border:1px solid var(--line);border-radius:999px;padding:7px 14px;transition:.2s}
.pd-tags a:hover{color:var(--cyan);border-color:var(--cyan)}

.pd-actions{display:flex;flex-wrap:wrap;gap:11px;margin-top:28px}

.pd-body{display:grid;grid-template-columns:minmax(0,1fr) 330px;gap:clamp(28px,4vw,54px);
  align-items:start;margin-top:clamp(32px,4vw,48px)}
@media(max-width:940px){.pd-body{grid-template-columns:1fr}}

.pd-h{font-family:var(--mono);font-size:11.5px;letter-spacing:.2em;text-transform:uppercase;
  color:var(--cyan);font-weight:500;margin-bottom:20px}
.pd-abs p{font-size:17px;line-height:1.82;color:var(--fg-2);max-width:70ch}
.pd-abs p + p{margin-top:22px}
.pd-abs p:first-of-type{color:var(--fg);font-size:17.5px}

/* ══════════ SIDEBAR ══════════ */
.pd-side{display:flex;flex-direction:column;gap:14px;position:sticky;top:92px}
@media(max-width:940px){.pd-side{position:static}}
.side-box .p-in{padding:22px}
.side-h{font-family:var(--mono);font-size:10.5px;letter-spacing:.2em;text-transform:uppercase;
  color:var(--fg-3);font-weight:500;margin-bottom:16px}

.side-dl{display:grid;grid-template-columns:auto 1fr;gap:10px 16px;margin:0;font-size:13px}
.side-dl dt{font-family:var(--mono);font-size:11px;letter-spacing:.08em;text-transform:uppercase;
  color:var(--fg-3)}
.side-dl dd{margin:0;color:var(--fg-2);word-break:break-word}
.side-dl a{color:var(--cyan);border-bottom:1px solid rgba(34,211,238,.28)}
.side-dl a:hover{border-bottom-color:var(--cyan)}

.cite-tabs{display:flex;gap:6px;margin-bottom:12px}
.ct{font-family:var(--mono);font-size:11px;letter-spacing:.12em;text-transform:uppercase;
  padding:6px 12px;border-radius:999px;border:1px solid var(--line);color:var(--fg-3);transition:.2s}
.ct:hover{color:var(--fg-2);border-color:var(--line-2)}
.ct.on{color:var(--cyan);border-color:var(--cyan);background:rgba(34,211,238,.08)}

.cite-box{margin:0;padding:14px;border-radius:12px;border:1px solid var(--line);
  background:rgba(0,0,0,.34);overflow-x:auto;max-height:290px}
.cite-box code{font-family:var(--mono);font-size:11.5px;line-height:1.7;color:var(--fg-2);
  white-space:pre-wrap;word-break:break-word}
.copy{margin-top:12px;width:100%;justify-content:center}
.copy.done{color:var(--lime);border-color:var(--lime)}

/* ══════════ RELATED / BACK ══════════ */
.pd-rel{margin-top:clamp(52px,7vw,84px);padding-top:clamp(32px,4vw,44px);border-top:1px solid var(--line)}
.pd-back{margin-top:44px;font-family:var(--mono);font-size:12.5px}
.pd-back a{color:var(--fg-3);transition:color .2s}
.pd-back a:hover{color:var(--cyan)}

/* ══════════ CTA PANEL ══════════ */
.cite-all{margin-top:clamp(40px,5vw,64px)}
.cite-all .p-in{flex-direction:row;align-items:center;justify-content:space-between;
  gap:clamp(20px,3vw,40px);flex-wrap:wrap}
.ca-t{font-size:21px;font-weight:600;letter-spacing:-.02em}
.ca-x{margin-top:9px;font-size:14.5px;line-height:1.68;color:var(--fg-2);max-width:52ch}
.ca-btns{display:flex;flex-wrap:wrap;gap:10px}

/* ══════════ PROSE ══════════ */
.prose{max-width:70ch}
.prose h2{font-size:clamp(21px,2.6vw,27px);font-weight:600;letter-spacing:-.025em;
  margin-top:clamp(40px,5vw,58px)}
.prose h2:first-child{margin-top:0}
.prose p{margin-top:18px;font-size:16.5px;line-height:1.82;color:var(--fg-2)}
.prose a{color:var(--cyan);border-bottom:1px solid rgba(34,211,238,.3)}
.prose a:hover{border-bottom-color:var(--cyan)}

/* ══════════ FOOTER ══════════ */
.ft-mid{display:flex;flex-wrap:wrap;gap:16px}
.ft-mid a{transition:color .2s}
.ft-mid a:hover{color:var(--cyan)}
@media(max-width:760px){.ft-mid{order:3;width:100%;justify-content:center}}

.ft-sync{justify-content:center;margin-top:18px;padding-top:16px;
  border-top:1px solid var(--line);font-size:11px;letter-spacing:.06em;opacity:.66}

/* ══════════ MOTION / PRINT ══════════ */
@media(prefers-reduced-motion:reduce){
  .aurora{animation:none}
  .p:hover,.btn:hover{transform:none}
  html{scroll-behavior:auto}
}

@media print{
  .bg,.mesh,.scan,.nav,.pd-side,.pd-rel,.pd-back,footer,.pfilters{display:none !important}
  body{background:#fff;color:#000}
  .hero-t,.stats b{-webkit-text-fill-color:#000;color:#000}
  .pd-abs p{color:#000;font-size:12pt}
  a{color:#000;text-decoration:underline}
}