/* ============================================================
   ARUN D. CHACHAN — PORTFOLIO
   Dark editorial design system. Built to land in the top 0.001%.
   Palette: deep ink + warm ivory + signature gold + emerald accent.
   See docs/DESIGN-SYSTEM.md for the full token reference.
   ============================================================ */
:root{
  --ink:#0b0b0d;
  --ink-2:#101013;
  --panel:#15151a;
  --panel-2:#1b1b21;
  --line:rgba(236,231,223,.10);
  --line-strong:rgba(236,231,223,.18);
  --ivory:#ECE7DF;
  --ivory-dim:#b7b2a8;
  --muted:#86827a;
  --gold:#D4AF5A;
  --gold-soft:#E7CD8B;
  --gold-deep:#A9842F;
  --emerald:#46B98C;
  --emerald-deep:#2C8C68;
  --radius:18px;
  --maxw:1180px;
  --ease:cubic-bezier(.22,.61,.36,1);
  --serif:"Fraunces",Georgia,"Times New Roman",serif;
  --sans:"Inter",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:var(--sans);
  background:var(--ink);
  color:var(--ivory);
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body.nav-open{overflow:hidden}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
::selection{background:var(--gold);color:#1a1407}

/* ---------- Layout helpers ---------- */
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 28px}
section{position:relative;padding:108px 0}
.eyebrow{
  font-size:12px;letter-spacing:.28em;text-transform:uppercase;
  color:var(--gold);font-weight:600;display:inline-flex;align-items:center;gap:10px;margin-bottom:22px;
}
.eyebrow::before{content:"";width:26px;height:1px;background:var(--gold);opacity:.7}
h1,h2,h3,h4{font-family:var(--serif);font-weight:500;line-height:1.08;letter-spacing:-.01em}
h2.title{font-size:clamp(30px,4.4vw,52px);margin-bottom:18px}
h2.title-line{font-size:clamp(20px,3vw,36px);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
@media(max-width:720px){h2.title-line{white-space:normal;font-size:clamp(22px,5.4vw,30px)}}
.lead{color:var(--ivory-dim);font-size:clamp(16px,1.5vw,19px);max-width:680px}
.dim{color:var(--muted)}

/* ---------- Reveal animation ---------- */
.reveal{opacity:0;transform:translateY(26px);transition:opacity .9s var(--ease),transform .9s var(--ease)}
.reveal.in{opacity:1;transform:none}
.reveal.d1{transition-delay:.08s}.reveal.d2{transition-delay:.16s}.reveal.d3{transition-delay:.24s}.reveal.d4{transition-delay:.32s}

/* ---------- Nav ---------- */
header.nav{
  position:fixed;top:0;left:0;right:0;z-index:100;
  transition:background .4s var(--ease),border-color .4s var(--ease),backdrop-filter .4s;
  border-bottom:1px solid transparent;
}
header.nav.scrolled{background:rgba(11,11,13,.78);backdrop-filter:blur(14px);border-bottom:1px solid var(--line)}
.nav-inner{max-width:var(--maxw);margin:0 auto;padding:18px 28px;display:flex;align-items:center;justify-content:space-between}
.brand{display:flex;align-items:center;gap:12px;font-family:var(--serif);font-size:19px;letter-spacing:.02em}
.brand .mono{
  width:38px;height:38px;border-radius:10px;border:1px solid var(--gold);
  display:grid;place-items:center;color:var(--gold);font-size:20px;
  background:linear-gradient(160deg,rgba(212,175,90,.16),transparent);
}
.brand b{font-weight:600}
.nav-links{display:flex;align-items:center;gap:30px}
.nav-links a{font-size:14px;color:var(--ivory-dim);font-family:var(--sans);position:relative;transition:color .3s}
.nav-links a::after{content:"";position:absolute;left:0;bottom:-6px;width:0;height:1px;background:var(--gold);transition:width .3s var(--ease)}
.nav-links a:hover{color:var(--ivory)}.nav-links a:hover::after{width:100%}
.nav-links a.btn,
.nav-links a.btn:hover,
.nav-links a.btn:visited,
.nav-links a.btn:focus{color:#0b0b0d !important;font-weight:700 !important;letter-spacing:.01em}
.nav-links a.btn::after{display:none !important}
.btn{
  font-family:var(--sans);font-size:14px;font-weight:500;cursor:pointer;
  padding:11px 20px;border-radius:999px;border:1px solid var(--gold);
  color:var(--ink);background:var(--gold);transition:transform .25s var(--ease),box-shadow .25s,background .25s;
  display:inline-flex;align-items:center;gap:8px;white-space:nowrap;
}
.btn:hover{transform:translateY(-2px);box-shadow:0 10px 30px -10px rgba(212,175,90,.5);background:var(--gold-soft)}
.btn.ghost{background:transparent;color:var(--ivory);border-color:var(--line-strong)}
.btn.ghost:hover{border-color:var(--gold);color:var(--gold);box-shadow:none}
.hamburger{display:none;flex-direction:column;gap:5px;background:none;border:0;cursor:pointer;padding:8px}
.hamburger span{width:24px;height:2px;background:var(--ivory);transition:.3s var(--ease)}
body.nav-open .hamburger span:nth-child(1){transform:translateY(7px) rotate(45deg)}
body.nav-open .hamburger span:nth-child(2){opacity:0}
body.nav-open .hamburger span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* ---------- Hero ---------- */
.hero{padding:184px 0 96px;overflow:hidden}
.hero-bg{position:absolute;inset:0;z-index:0;pointer-events:none}
.hero-bg .orb{position:absolute;border-radius:50%;filter:blur(70px);opacity:.5}
.hero-bg .o1{width:520px;height:520px;background:radial-gradient(circle,rgba(212,175,90,.22),transparent 70%);top:-160px;right:-120px;animation:float1 18s ease-in-out infinite}
.hero-bg .o2{width:420px;height:420px;background:radial-gradient(circle,rgba(70,185,140,.14),transparent 70%);bottom:-120px;left:-80px;animation:float2 22s ease-in-out infinite}
.hero-bg .grid{position:absolute;inset:0;background-image:linear-gradient(var(--line) 1px,transparent 1px),linear-gradient(90deg,var(--line) 1px,transparent 1px);background-size:64px 64px;mask-image:radial-gradient(ellipse 80% 60% at 50% 30%,black,transparent 80%);opacity:.5}
@keyframes float1{50%{transform:translate(-40px,40px)}}
@keyframes float2{50%{transform:translate(40px,-30px)}}
.hero-inner{position:relative;z-index:2}
.hero .status{
  display:inline-flex;align-items:center;gap:10px;font-size:13px;color:var(--ivory-dim);
  border:1px solid var(--line-strong);padding:8px 16px;border-radius:999px;margin-bottom:30px;background:rgba(255,255,255,.02);
}
.hero .status .dot{width:8px;height:8px;border-radius:50%;background:var(--emerald);box-shadow:0 0 0 0 rgba(70,185,140,.6);animation:pulse 2.4s infinite}
@keyframes pulse{0%{box-shadow:0 0 0 0 rgba(70,185,140,.55)}70%{box-shadow:0 0 0 9px rgba(70,185,140,0)}100%{box-shadow:0 0 0 0 rgba(70,185,140,0)}}
.hero h1{font-size:clamp(40px,7vw,86px);font-weight:400;letter-spacing:-.02em;max-width:16ch}
.hero h1 .em{font-style:italic;color:var(--gold);font-weight:500}
.hero h1 .grad{background:linear-gradient(100deg,var(--gold-soft),var(--gold),var(--emerald));-webkit-background-clip:text;background-clip:text;color:transparent}
.hero-sub{margin-top:28px;font-size:clamp(16px,1.7vw,20px);color:var(--ivory-dim);max-width:62ch}
.hero-sub b{color:var(--ivory);font-weight:600}
.hero-cta{margin-top:38px;display:flex;flex-wrap:wrap;gap:14px;align-items:center}
.hero-tags{margin-top:44px;display:flex;flex-wrap:wrap;gap:10px}
.tag{font-size:12.5px;color:var(--ivory-dim);border:1px solid var(--line);padding:7px 14px;border-radius:999px;background:rgba(255,255,255,.015);transition:.3s}
.tag:hover{border-color:var(--gold);color:var(--gold)}

/* ---------- Marquee proof bar ---------- */
.proofbar{border-top:1px solid var(--line);border-bottom:1px solid var(--line);background:var(--ink-2);padding:26px 0;overflow:hidden}
.marquee{display:flex;gap:54px;white-space:nowrap;animation:scroll 38s linear infinite;width:max-content}
.proofbar:hover .marquee{animation-play-state:paused}
.marquee span{font-family:var(--serif);font-size:18px;color:var(--ivory-dim);display:inline-flex;align-items:center;gap:54px}
.marquee span::after{content:"\25C6";color:var(--gold);font-size:10px}
@keyframes scroll{to{transform:translateX(-50%)}}

/* ---------- Metrics ---------- */
.metrics-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin-top:8px}
.metric{border:1px solid var(--line);border-radius:var(--radius);padding:30px 24px;background:linear-gradient(165deg,var(--panel),var(--ink-2));position:relative;overflow:hidden;transition:.4s var(--ease)}
.metric::before{content:"";position:absolute;top:0;left:0;width:100%;height:2px;background:linear-gradient(90deg,var(--gold),transparent);opacity:0;transition:.4s}
.metric:hover{transform:translateY(-5px);border-color:var(--line-strong)}
.metric:hover::before{opacity:1}
.metric .num{font-family:var(--serif);font-size:clamp(30px,3.6vw,46px);color:var(--gold);font-weight:500;line-height:1}
.metric .lbl{margin-top:12px;font-size:13.5px;color:var(--ivory-dim)}

/* ---------- Rare profile / Venn ---------- */
.rare{display:grid;grid-template-columns:1.05fr .95fr;gap:60px;align-items:center}
.venn{position:relative;width:100%;aspect-ratio:1/.9;max-width:460px;margin:0 auto}
.venn .c{position:absolute;border-radius:50%;mix-blend-mode:screen;display:grid;place-items:center;text-align:center;font-size:13px;font-weight:600;letter-spacing:.04em;border:1px solid rgba(255,255,255,.14)}
.venn .c span{padding:0 8px;transform:translateY(-22px)}
.venn .c3 span{transform:translateY(46px)}
.venn .c1{width:58%;height:58%;top:0;left:6%;background:radial-gradient(circle,rgba(212,175,90,.30),rgba(212,175,90,.06));color:var(--gold-soft)}
.venn .c2{width:58%;height:58%;top:0;right:6%;background:radial-gradient(circle,rgba(70,185,140,.28),rgba(70,185,140,.05));color:#8fe0c0}
.venn .c3{width:58%;height:58%;bottom:0;left:50%;transform:translateX(-50%);background:radial-gradient(circle,rgba(160,170,255,.24),rgba(160,170,255,.05));color:#bcc3ff}
.venn .core{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);z-index:3;width:120px;height:120px;border-radius:50%;background:rgba(11,11,13,.86);border:1px solid var(--gold);display:grid;place-items:center;text-align:center;mix-blend-mode:normal}
.venn .core b{font-family:var(--serif);color:var(--gold);font-size:15px;line-height:1.2}
.rare ul{list-style:none;margin-top:26px;display:grid;gap:16px}
.rare li{display:flex;gap:14px;font-size:15.5px;color:var(--ivory-dim)}
.rare li svg{flex:0 0 auto;margin-top:3px}
.rare li b{color:var(--ivory);font-weight:600}

/* ---------- Section heading row ---------- */
.head-row{display:flex;justify-content:space-between;align-items:flex-end;gap:30px;flex-wrap:wrap;margin-bottom:54px}
.head-row .lead{margin-top:6px}

/* ---------- Case studies ---------- */
.cases{display:grid;gap:20px}
.case{border:1px solid var(--line);border-radius:var(--radius);background:linear-gradient(165deg,var(--panel),var(--ink-2));overflow:hidden;transition:border-color .4s var(--ease)}
.case:hover{border-color:var(--line-strong)}
.case-head{display:grid;grid-template-columns:auto 1fr auto;gap:22px;align-items:center;padding:26px 28px;cursor:pointer}
.case-logo{width:54px;height:54px;border-radius:13px;display:grid;place-items:center;font-family:var(--serif);font-size:22px;font-weight:600;color:var(--ink);flex:0 0 auto}
.case-tt h3{font-size:21px;font-weight:600}
.case-tt .meta{font-size:13px;color:var(--muted);margin-top:3px}
.case-tags{display:flex;gap:8px;flex-wrap:wrap;justify-content:flex-end;max-width:340px}
.chip{font-size:11.5px;color:var(--ivory-dim);border:1px solid var(--line);padding:5px 11px;border-radius:999px;white-space:nowrap}
.chip.gold{color:var(--gold);border-color:rgba(212,175,90,.4)}
.case-toggle{width:38px;height:38px;border-radius:50%;border:1px solid var(--line-strong);display:grid;place-items:center;transition:.35s var(--ease);flex:0 0 auto}
.case-toggle svg{transition:.35s var(--ease)}
.case.open .case-toggle{background:var(--gold);border-color:var(--gold)}
.case.open .case-toggle svg{transform:rotate(45deg);stroke:var(--ink)}
.case-body{max-height:0;overflow:hidden;transition:max-height .6s var(--ease)}
.case-body-inner{padding:4px 28px 32px;border-top:1px solid var(--line)}
.case-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin:24px 0 8px}
.cg{border:1px solid var(--line);border-radius:12px;padding:18px}
.cg .k{font-size:11px;letter-spacing:.18em;text-transform:uppercase;color:var(--gold);margin-bottom:8px}
.cg p{font-size:14px;color:var(--ivory-dim)}
.case-results{display:flex;flex-wrap:wrap;gap:26px;margin-top:22px;padding-top:22px;border-top:1px solid var(--line)}
.case-results .r{display:flex;flex-direction:column}
.case-results .r b{font-family:var(--serif);font-size:30px;color:var(--gold);font-weight:500;line-height:1}
.case-results .r small{font-size:12.5px;color:var(--ivory-dim);margin-top:6px}

/* ---------- Tabs / frameworks ---------- */
.fw{display:grid;grid-template-columns:300px 1fr;gap:30px;border:1px solid var(--line);border-radius:var(--radius);background:linear-gradient(165deg,var(--panel),var(--ink-2));overflow:hidden}
.fw-tabs{display:flex;flex-direction:column;border-right:1px solid var(--line);background:rgba(0,0,0,.16)}
.fw-tab{text-align:left;background:none;border:0;border-left:2px solid transparent;cursor:pointer;padding:18px 22px;color:var(--ivory-dim);font-family:var(--sans);transition:.3s;border-bottom:1px solid var(--line)}
.fw-tab:last-child{border-bottom:0}
.fw-tab .t{font-size:15px;font-weight:600;color:var(--ivory);display:flex;align-items:center;gap:10px}
.fw-tab .t .ix{font-family:var(--serif);color:var(--gold);font-size:13px;width:22px}
.fw-tab .s{font-size:12.5px;margin-top:4px;padding-left:32px}
.fw-tab:hover{background:rgba(255,255,255,.02)}
.fw-tab.active{border-left-color:var(--gold);background:rgba(212,175,90,.07)}
.fw-panels{padding:36px 38px;min-height:380px}
.fw-panel{display:none;animation:fade .5s var(--ease)}
.fw-panel.active{display:block}
@keyframes fade{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:none}}
.fw-panel h3{font-size:26px;margin-bottom:6px}
.fw-panel .tm{color:var(--gold);font-size:13px;letter-spacing:.12em;text-transform:uppercase;margin-bottom:18px}
.fw-panel p{color:var(--ivory-dim);font-size:15px;max-width:62ch}
.fw-steps{display:flex;flex-wrap:wrap;gap:10px;margin-top:24px}
.fw-step{display:flex;align-items:center;gap:10px;border:1px solid var(--line);border-radius:10px;padding:12px 14px;font-size:13.5px;background:rgba(255,255,255,.015);flex:1 1 140px;min-width:140px}
.fw-step .n{width:24px;height:24px;border-radius:7px;background:rgba(212,175,90,.14);color:var(--gold);display:grid;place-items:center;font-family:var(--serif);font-size:13px;flex:0 0 auto}
.fw-step .fws-lbl{display:flex;flex-direction:column;line-height:1.25;gap:2px;min-width:0}
.fw-step .fws-lbl b{font-weight:600;color:var(--ivory)}
.fw-step .fws-lbl .fws-desc{font-size:11.5px;color:var(--ivory-dim);font-weight:400}
.fw-arrow{color:var(--muted);align-self:center}
.fw-proof{margin-top:24px;font-size:13.5px;color:var(--ivory);border-left:2px solid var(--emerald);padding:8px 0 8px 16px;background:linear-gradient(90deg,rgba(70,185,140,.07),transparent)}
.fw-proof b{color:var(--emerald)}

/* ---------- AI / N8N workflow ---------- */
.ai-wrap{display:grid;grid-template-columns:1fr;gap:30px}
.flow{border:1px solid var(--line);border-radius:var(--radius);background:radial-gradient(120% 120% at 50% 0%,var(--panel),var(--ink-2));padding:30px;position:relative;overflow:hidden}
.flow h3{font-size:19px;margin-bottom:4px}
.flow .sub{font-size:13.5px;color:var(--muted);margin-bottom:24px}
.flow svg{width:100%;height:auto;display:block}
.flow .node-label{font-family:var(--sans);font-size:11.5px;fill:var(--ivory)}
.flow .node-sub{font-family:var(--sans);font-size:9.5px;fill:var(--muted)}
.dash{stroke-dasharray:6 7;animation:dashmove 1.1s linear infinite}
@keyframes dashmove{to{stroke-dashoffset:-26}}
.ai-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.ai-card{border:1px solid var(--line);border-radius:14px;padding:24px;background:linear-gradient(165deg,var(--panel),var(--ink-2));transition:.4s var(--ease)}
.ai-card:hover{transform:translateY(-4px);border-color:var(--line-strong)}
.ai-card .ico{width:42px;height:42px;border-radius:11px;display:grid;place-items:center;background:rgba(212,175,90,.12);color:var(--gold);margin-bottom:16px}
.ai-card h4{font-size:16.5px;font-weight:600;font-family:var(--sans);margin-bottom:8px}
.ai-card p{font-size:13.5px;color:var(--ivory-dim)}
.ai-card .impact{margin-top:14px;font-size:12px;color:var(--emerald);font-weight:600}
.stack{display:grid;grid-template-columns:repeat(5,1fr);gap:0;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;margin-top:6px}
.stack .layer{padding:24px 18px;border-right:1px solid var(--line);position:relative;transition:.4s}
.stack .layer:last-child{border-right:0}
.stack .layer:hover{background:rgba(212,175,90,.05)}
.stack .layer .ln{font-family:var(--serif);color:var(--gold);font-size:13px}
.stack .layer h4{font-family:var(--sans);font-size:15px;font-weight:600;margin:8px 0}
.stack .layer p{font-size:12.5px;color:var(--ivory-dim)}

/* ---------- Leadership ---------- */
.lead-grid{display:grid;grid-template-columns:1.1fr 1fr;gap:50px;align-items:start}
.principles{display:grid;gap:14px}
.principle{display:flex;gap:16px;border:1px solid var(--line);border-radius:14px;padding:20px 22px;background:linear-gradient(165deg,var(--panel),var(--ink-2))}
.principle .pn{font-family:var(--serif);font-size:22px;color:var(--gold);flex:0 0 auto;line-height:1.2}
.principle h4{font-family:var(--sans);font-size:16px;font-weight:600;margin-bottom:4px}
.principle p{font-size:13.5px;color:var(--ivory-dim)}
.quote{border:1px solid var(--line);border-radius:var(--radius);padding:40px;background:linear-gradient(165deg,var(--panel),var(--ink-2));position:relative}
.quote .mark{font-family:var(--serif);font-size:90px;color:var(--gold);opacity:.22;position:absolute;top:6px;left:24px;line-height:1}
.quote blockquote{font-family:var(--serif);font-size:23px;line-height:1.4;font-style:italic;position:relative;z-index:1;color:var(--ivory)}
.quote cite{display:block;margin-top:18px;font-style:normal;font-size:13.5px;color:var(--muted)}

/* ---------- Timeline ---------- */
.tl{position:relative;margin-top:20px;padding-left:30px}
.tl::before{content:"";position:absolute;left:7px;top:6px;bottom:6px;width:2px;background:linear-gradient(var(--gold),var(--line))}
.tl-item{position:relative;padding:0 0 34px 0}
.tl-item::before{content:"";position:absolute;left:-30px;top:5px;width:16px;height:16px;border-radius:50%;background:var(--ink);border:2px solid var(--gold)}
.tl-item.acq::before{background:var(--gold)}
.tl-item .yr{font-size:12.5px;color:var(--gold);letter-spacing:.08em;font-weight:600}
.tl-item h4{font-family:var(--sans);font-size:17px;font-weight:600;margin:4px 0 2px}
.tl-item .role{font-size:13.5px;color:var(--ivory-dim)}
.tl-item p{font-size:13.5px;color:var(--muted);margin-top:6px;max-width:60ch}
.badge-acq{display:inline-block;font-size:11px;letter-spacing:.08em;text-transform:uppercase;color:var(--emerald);border:1px solid rgba(70,185,140,.4);padding:3px 9px;border-radius:999px;margin-left:8px}

/* ---------- Skills ---------- */
.skill-cats{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}
.skill-cat{border:1px solid var(--line);border-radius:14px;padding:24px;background:linear-gradient(165deg,var(--panel),var(--ink-2))}
.skill-cat h4{font-family:var(--sans);font-size:13px;letter-spacing:.14em;text-transform:uppercase;color:var(--gold);margin-bottom:16px}
.skill-cat .pills{display:flex;flex-wrap:wrap;gap:8px}
.skill-cat .pills span{font-size:12.5px;color:var(--ivory-dim);border:1px solid var(--line);padding:6px 12px;border-radius:8px;transition:.25s}
.skill-cat .pills span:hover{color:var(--ivory);border-color:var(--line-strong);background:rgba(255,255,255,.02)}

/* ---------- Beyond work / book ---------- */
.beyond-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.book-feature{grid-column:1/-1;display:grid;grid-template-columns:230px 1fr;gap:40px;align-items:center;border:1px solid var(--line);border-radius:var(--radius);padding:36px;background:radial-gradient(120% 120% at 0% 0%,rgba(212,175,90,.08),var(--ink-2))}
.book-cover{position:relative;width:200px;aspect-ratio:5.5/8.5;border-radius:6px;overflow:hidden;box-shadow:0 30px 60px -20px rgba(0,0,0,.8),0 0 0 1px var(--line-strong);transition:transform .5s var(--ease)}
.book-feature:hover .book-cover{transform:rotateY(-12deg) rotateX(4deg) translateY(-4px)}
.book-cover img{width:100%;height:100%;object-fit:cover}
.book-cover .fallback{position:absolute;inset:0;background:linear-gradient(150deg,#2a2118,#0d0a06);display:flex;flex-direction:column;justify-content:center;padding:24px;border:1px solid var(--gold-deep)}
.book-cover .fallback .ft{font-family:var(--serif);font-style:italic;font-size:22px;color:var(--gold-soft);line-height:1.2}
.book-cover .fallback .fa{margin-top:auto;font-size:12px;letter-spacing:.18em;text-transform:uppercase;color:var(--ivory-dim)}
.book-info h3{font-size:27px;margin-bottom:4px}
.book-info .by{font-size:13px;color:var(--gold);letter-spacing:.06em;margin-bottom:16px}
.book-info p{font-size:14.5px;color:var(--ivory-dim);max-width:60ch}
.book-info .specs{display:flex;flex-wrap:wrap;gap:8px;margin-top:18px}
.book-info .specs span{font-size:11.5px;color:var(--muted);border:1px solid var(--line);padding:5px 11px;border-radius:999px}
.book-info .pull{font-family:var(--serif);font-style:italic;color:var(--ivory);font-size:16px;border-left:2px solid var(--gold);padding-left:16px;margin:18px 0}
.passion{border:1px solid var(--line);border-radius:14px;padding:26px;background:linear-gradient(165deg,var(--panel),var(--ink-2));transition:.4s var(--ease)}
.passion:hover{transform:translateY(-4px);border-color:var(--line-strong)}
.passion .ico{font-size:26px;margin-bottom:12px}
.passion h4{font-family:var(--sans);font-size:17px;font-weight:600;margin-bottom:8px}
.passion p{font-size:13.5px;color:var(--ivory-dim)}

/* ---------- Contact ---------- */
.contact{background:var(--ink-2);border-top:1px solid var(--line)}
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:start}
.contact h2{font-size:clamp(32px,5vw,56px)}
.contact .lead{margin-top:14px}
.contact-methods{margin-top:32px;display:grid;gap:14px}
.cm{display:flex;align-items:center;gap:16px;border:1px solid var(--line);border-radius:13px;padding:16px 20px;transition:.3s var(--ease)}
.cm:hover{border-color:var(--gold);transform:translateX(4px)}
.cm .ico{width:42px;height:42px;border-radius:11px;background:rgba(212,175,90,.12);color:var(--gold);display:grid;place-items:center;flex:0 0 auto}
.cm .t{font-size:12px;color:var(--muted)}
.cm .v{font-size:15px;color:var(--ivory);font-weight:500}
form{border:1px solid var(--line);border-radius:var(--radius);padding:32px;background:linear-gradient(165deg,var(--panel),var(--ink-2))}
.field{margin-bottom:18px}
.field label{display:block;font-size:12.5px;color:var(--ivory-dim);margin-bottom:8px;letter-spacing:.02em}
.field input,.field textarea{
  width:100%;background:rgba(0,0,0,.25);border:1px solid var(--line-strong);border-radius:10px;
  padding:13px 15px;color:var(--ivory);font-family:var(--sans);font-size:14.5px;transition:.3s;
}
.field input:focus,.field textarea:focus{outline:none;border-color:var(--gold);box-shadow:0 0 0 3px rgba(212,175,90,.12)}
.field textarea{resize:vertical;min-height:120px}
form .btn{width:100%;justify-content:center;padding:14px;font-size:15px}
.form-note{font-size:12px;color:var(--muted);margin-top:14px;text-align:center}

/* ---------- Footer ---------- */
footer{border-top:1px solid var(--line);padding:40px 0;text-align:center}
footer .fbrand{font-family:var(--serif);font-size:22px;color:var(--gold)}
footer p{font-size:13px;color:var(--muted);margin-top:10px}
footer .soc{display:flex;gap:18px;justify-content:center;margin-top:18px}
footer .soc a{font-size:13px;color:var(--ivory-dim);transition:.3s}
footer .soc a:hover{color:var(--gold)}
.totop{position:fixed;right:24px;bottom:24px;width:46px;height:46px;border-radius:50%;background:var(--gold);color:var(--ink);display:grid;place-items:center;z-index:90;opacity:0;transform:translateY(20px);transition:.4s var(--ease);cursor:pointer;border:0}
.totop.show{opacity:1;transform:none}

/* ---------- Responsive ---------- */
@media(max-width:980px){
  .metrics-grid{grid-template-columns:repeat(2,1fr)}
  .rare,.lead-grid,.contact-grid{grid-template-columns:1fr;gap:40px}
  .ai-cards{grid-template-columns:1fr 1fr}
  .stack{grid-template-columns:1fr 1fr}
  .stack .layer{border-bottom:1px solid var(--line)}
  .fw{grid-template-columns:1fr}
  .fw-tabs{flex-direction:row;overflow-x:auto;border-right:0;border-bottom:1px solid var(--line)}
  .fw-tab{border-bottom:0;border-left:0;border-top:2px solid transparent;min-width:200px}
  .fw-tab.active{border-left-color:transparent;border-top-color:var(--gold)}
  .fw-tab .s{display:none}
  .book-feature{grid-template-columns:1fr;justify-items:center;text-align:center}
  .book-info .pull,.book-info p{text-align:left}
}
@media(max-width:680px){
  section{padding:74px 0}
  .nav-links{
    position:fixed;inset:0;top:0;flex-direction:column;justify-content:center;gap:30px;
    background:rgba(11,11,13,.97);backdrop-filter:blur(10px);transform:translateX(100%);transition:transform .45s var(--ease);
  }
  body.nav-open .nav-links{transform:none}
  .nav-links a{font-size:22px;font-family:var(--serif)}
  .nav-links .btn{font-size:16px}
  .hamburger{display:flex;z-index:101}
  .metrics-grid,.skill-cats,.beyond-grid,.ai-cards,.stack{grid-template-columns:1fr}
  .case-head{grid-template-columns:auto 1fr auto;gap:14px}
  .case-tags{display:none}
  .case-grid,.case-results{flex-direction:column}
  .case-grid{grid-template-columns:1fr}
  .venn{max-width:330px}
  .quote{padding:30px 24px}
  .wrap{padding:0 20px}
}
@media(prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
  .reveal{opacity:1;transform:none}
}