/* JYNX — design system
   Paper-white editorial surfaces, near-black navy ink, deep-night product
   surfaces. The purple→blue→cyan gradient is reserved for the logo, the
   kicker tick, and rare emphasis. Typography carries the hierarchy. */

:root{
  --paper:#fafaf7;
  --paper-2:#f1f1ec;
  --ink:#0b0f1a;
  --ink-soft:#3d4654;
  --muted:#697280;
  --faint:#9aa2ae;
  --hairline:#e3e3dc;
  --night:#070c16;
  --night-2:#0b1322;
  --night-3:#101a2c;
  --night-hairline:#1d2740;
  --night-text:#e8ecf4;
  --night-muted:#8a96ab;
  --night-faint:#5b6880;
  --purple:#6b2cff;
  --blue:#345dff;
  --cyan:#12c8f4;
  --grad:linear-gradient(100deg,var(--purple),var(--blue) 55%,var(--cyan));
  --amber:#e8b45a;
  --red:#e87a6a;
  --green:#4fc78f;
  --shell:1280px;
  --shell-wide:1408px;
  --font:system-ui,-apple-system,"Segoe UI Variable Display","Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;background:var(--paper);color:var(--ink);
  font-family:var(--font);font-size:16px;line-height:1.55;
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
button{font:inherit;background:none;border:0;cursor:pointer;color:inherit}
h1,h2,h3,h4,p{margin:0}
::selection{background:rgba(52,93,255,.16)}

.shell{width:min(var(--shell),100% - 96px);margin-inline:auto}
.shell-wide{width:min(var(--shell-wide),100% - 64px);margin-inline:auto}

/* ---------- type ---------- */
.display{
  font-size:clamp(3.4rem,7.6vw,7.75rem);
  line-height:.94;letter-spacing:-.045em;font-weight:650;
}
.h-section{
  font-size:clamp(2.1rem,3.8vw,3.9rem);
  line-height:1.02;letter-spacing:-.032em;font-weight:640;
}
.h-sub{font-size:clamp(1.3rem,1.8vw,1.65rem);line-height:1.25;letter-spacing:-.015em;font-weight:620}
.lede{font-size:clamp(1.1rem,1.4vw,1.3rem);line-height:1.5;color:var(--ink-soft);font-weight:420}
.body-copy{font-size:1.02rem;line-height:1.65;color:var(--muted)}
.dim{color:var(--faint)}
.on-night .dim{color:var(--night-faint)}

.kicker{
  display:flex;align-items:center;gap:12px;
  font-size:.72rem;font-weight:640;letter-spacing:.15em;text-transform:uppercase;
  color:var(--muted);
}
.kicker::before{content:"";width:22px;height:2px;background:var(--grad);flex:none}
.on-night .kicker{color:var(--night-muted)}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;gap:10px;
  padding:15px 24px;border-radius:6px;
  font-size:.95rem;font-weight:600;letter-spacing:-.005em;line-height:1;
  border:1px solid transparent;
  transition:background-color .18s ease,border-color .18s ease,color .18s ease,transform .18s ease;
}
.btn .arr{transition:transform .18s ease;font-weight:500}
.btn:hover .arr{transform:translateX(3px)}
.btn-primary{background:var(--ink);color:#fff}
.btn-primary:hover{background:#1d2740}
.btn-secondary{border-color:rgba(11,15,26,.22);color:var(--ink);background:transparent}
.btn-secondary:hover{border-color:var(--ink)}
.btn-sm{padding:11px 18px;font-size:.9rem}
.on-night .btn-primary{background:#fff;color:var(--ink)}
.on-night .btn-primary:hover{background:#dbe2ee}
.on-night .btn-secondary{border-color:rgba(232,236,244,.28);color:var(--night-text)}
.on-night .btn-secondary:hover{border-color:rgba(232,236,244,.7)}
.text-link{font-weight:600;font-size:.95rem;border-bottom:1px solid rgba(11,15,26,.25);padding-bottom:2px;transition:border-color .15s ease}
.text-link:hover{border-color:var(--ink)}
.on-night .text-link{border-color:rgba(232,236,244,.3)}
.on-night .text-link:hover{border-color:#fff}

/* ---------- nav ---------- */
.site-nav{
  position:sticky;top:0;z-index:60;
  background:color-mix(in srgb,var(--paper) 86%,transparent);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid var(--hairline);
}
.nav-row{height:74px;display:flex;align-items:center;gap:44px}
.brand{display:flex;align-items:center;gap:11px;font-size:1.28rem;font-weight:720;letter-spacing:.015em}
.brand img{width:27px;height:27px}
.nav-links{display:flex;align-items:center;gap:32px;font-size:.93rem;font-weight:560}
.nav-links a{color:var(--ink-soft);padding:6px 0;position:relative;transition:color .15s ease}
.nav-links a:hover{color:var(--ink)}
.nav-links a.active{color:var(--ink)}
.nav-links a.active::after{content:"";position:absolute;left:0;right:0;bottom:-2px;height:2px;background:var(--ink)}
.nav-actions{margin-left:auto;display:flex;align-items:center;gap:26px}
.nav-login{font-size:.93rem;font-weight:560;color:var(--ink-soft)}
.nav-login:hover{color:var(--ink)}
.menu-btn{display:none;margin-left:auto;padding:8px;color:var(--ink)}
.mobile-menu{display:none}
.mobile-menu.open{
  display:flex;flex-direction:column;
  position:absolute;left:0;right:0;top:74px;
  background:var(--paper);border-bottom:1px solid var(--hairline);
  padding:10px 24px 26px;
}
.mobile-menu a{padding:15px 0;font-size:1.15rem;font-weight:600;border-bottom:1px solid var(--hairline)}
.mobile-menu .mm-actions{display:flex;gap:14px;margin-top:22px;border:0}

/* ---------- hero ---------- */
.hero{padding:104px 0 84px}
.hero .kicker{margin-bottom:34px}
.hero h1{max-width:19ch}
.hero-row{display:grid;grid-template-columns:1.25fr .75fr;gap:64px;align-items:end;margin-top:44px}
.hero-row .lede{max-width:34ch}
.hero-ctas{display:flex;gap:14px;justify-content:flex-end;flex-wrap:wrap}

/* ---------- product surface (app mockup) ---------- */
.surface-wrap{padding-bottom:36px}
.surface-note{margin-top:14px;font-size:.74rem;color:var(--faint);text-align:right}
.app{
  background:var(--night);color:var(--night-text);
  border:1px solid #131c30;border-radius:12px;overflow:hidden;
  box-shadow:0 40px 90px -30px rgba(7,12,22,.45);
  font-size:.8rem;
  font-variant-numeric:tabular-nums;
}
.app-top{
  display:flex;align-items:center;gap:18px;
  padding:13px 20px;border-bottom:1px solid var(--night-hairline);
}
.app-top .brand{font-size:.85rem;gap:8px;font-weight:680;letter-spacing:.08em}
.app-top .brand img{width:17px;height:17px}
.app-ask{
  margin-left:auto;display:flex;align-items:center;gap:10px;
  border:1px solid var(--night-hairline);border-radius:6px;
  padding:7px 12px;color:var(--night-muted);font-size:.72rem;
}
.app-ask kbd{font-family:inherit;border:1px solid var(--night-hairline);border-radius:4px;padding:1px 5px;font-size:.66rem;color:var(--night-faint)}
.app-user{width:26px;height:26px;border-radius:50%;background:var(--night-3);border:1px solid var(--night-hairline);display:grid;place-items:center;font-size:.68rem;font-weight:650;color:var(--night-muted)}
.app-body{display:grid;grid-template-columns:196px 1fr 292px;min-height:540px}
.app-rail{border-right:1px solid var(--night-hairline);padding:18px 12px;display:flex;flex-direction:column;gap:2px}
.rail-item{
  display:flex;align-items:center;gap:11px;
  padding:9px 12px;border-radius:6px;color:var(--night-muted);font-weight:520;
}
.rail-item svg{width:14px;height:14px;flex:none;opacity:.75}
.rail-item.active{background:var(--night-3);color:#fff}
.rail-item.active svg{opacity:1}
.rail-sep{margin:14px 12px 10px;font-size:.62rem;letter-spacing:.14em;text-transform:uppercase;color:var(--night-faint)}
.app-main{padding:26px 28px;min-width:0}
.app-greeting h3{font-size:1.35rem;font-weight:640;letter-spacing:-.02em}
.app-greeting p{color:var(--night-muted);margin-top:5px}
.app-meta{color:var(--night-faint);font-size:.72rem}
.app-head-row{display:flex;align-items:flex-start;justify-content:space-between;gap:20px;margin-bottom:30px}
.work-label{
  display:flex;align-items:baseline;justify-content:space-between;
  font-size:.68rem;letter-spacing:.13em;text-transform:uppercase;color:var(--night-faint);
  padding-bottom:10px;border-bottom:1px solid var(--night-hairline);
}
.work-row{
  display:grid;grid-template-columns:1.5fr .8fr .9fr 74px;gap:16px;align-items:center;
  padding:15px 0;border-bottom:1px solid rgba(29,39,64,.6);
}
.work-row:last-child{border-bottom:0}
.work-name{font-weight:600;color:#f2f5fa}
.work-name small{display:block;font-weight:440;color:var(--night-faint);margin-top:3px;font-size:.72rem}
.work-ctx{color:var(--night-muted);font-size:.75rem}
.state{display:flex;align-items:center;gap:8px;font-size:.74rem;color:var(--night-muted)}
.state i{width:6px;height:6px;border-radius:50%;background:var(--night-faint);flex:none}
.state.is-moving i{background:var(--cyan)}
.state.is-judgment{color:var(--amber)}
.state.is-judgment i{background:var(--amber)}
.state.is-verify i{background:var(--blue)}
.work-time{color:var(--night-faint);font-size:.72rem;text-align:right}
.app-side{border-left:1px solid var(--night-hairline);padding:26px 22px;display:flex;flex-direction:column;gap:30px}
.side-block h4{font-size:.68rem;letter-spacing:.13em;text-transform:uppercase;color:var(--night-faint);font-weight:620;margin-bottom:4px;padding-bottom:10px;border-bottom:1px solid var(--night-hairline)}
.judg-item{padding:13px 0;border-bottom:1px solid rgba(29,39,64,.6)}
.judg-item:last-child{border-bottom:0}
.judg-item p{font-size:.78rem;color:#e4e9f2;line-height:1.45}
.judg-item small{display:block;color:var(--night-faint);margin-top:4px;font-size:.7rem}
.judg-item .judg-act{display:inline-block;margin-top:9px;font-size:.7rem;font-weight:640;color:var(--cyan)}
.done-item{display:flex;gap:10px;align-items:baseline;padding:8px 0;color:var(--night-muted);font-size:.76rem}
.done-item::before{content:"";width:5px;height:5px;border-radius:50%;background:var(--green);flex:none;transform:translateY(-2px)}

/* ---------- light/dark bands ---------- */
.band{padding:130px 0}
.band-tight{padding:104px 0}
.on-night{background:var(--night);color:var(--night-text)}
.on-night .body-copy{color:var(--night-muted)}
.on-night .lede{color:#b7c1d2}

/* thesis */
.thesis{padding:150px 0;border-top:1px solid var(--hairline)}
.thesis p{
  font-size:clamp(1.9rem,3.6vw,3.6rem);
  line-height:1.14;letter-spacing:-.03em;font-weight:620;max-width:36ch;
}
.thesis p span{display:block}
.thesis .t-dim{color:#b3b8bf}

/* loop */
.loop-head{max-width:640px;margin-bottom:96px}
.loop-head .kicker{margin-bottom:26px}
.loop-head .body-copy{margin-top:22px;max-width:52ch}
.loop-track{position:relative;display:grid;grid-template-columns:repeat(5,1fr);gap:40px}
.loop-track::before{
  content:"";position:absolute;top:5px;left:0;right:0;height:1px;
  background:linear-gradient(90deg,var(--night-hairline) 0%,var(--night-hairline) 82%,transparent);
}
.loop-step{position:relative;padding-top:34px}
.loop-step::before{
  content:"";position:absolute;top:0;left:0;width:11px;height:11px;border-radius:50%;
  background:var(--night);border:1px solid var(--night-faint);
}
.loop-step:first-child::before{background:var(--grad);border-color:transparent}
.loop-step b{display:block;font-size:1.02rem;font-weight:640;letter-spacing:-.01em;margin-bottom:10px}
.loop-step p{font-size:.86rem;line-height:1.55;color:var(--night-muted);max-width:24ch}
.loop-return{margin-top:70px;display:flex;align-items:center;gap:14px;color:var(--night-faint);font-size:.8rem}
.loop-return::before{content:"";width:44px;height:1px;background:var(--grad)}

/* editorial split + index rows */
.split{display:grid;grid-template-columns:.9fr 1.1fr;gap:96px;align-items:start}
.split-intro .kicker{margin-bottom:26px}
.split-intro .body-copy{margin-top:22px;max-width:44ch}
.split-intro .text-link{display:inline-block;margin-top:30px}
.index-rows{border-top:1px solid var(--hairline)}
.index-row{
  display:grid;grid-template-columns:72px 200px 1fr;gap:28px;align-items:baseline;
  padding:34px 0;border-bottom:1px solid var(--hairline);
}
.index-row .num{font-size:.78rem;color:var(--faint);font-variant-numeric:tabular-nums}
.index-row h3{font-size:1.4rem;font-weight:640;letter-spacing:-.02em}
.index-row p{color:var(--muted);line-height:1.6;max-width:46ch}
.on-night .index-rows{border-color:var(--night-hairline)}
.on-night .index-row{border-color:var(--night-hairline)}
.on-night .index-row .num{color:var(--night-faint)}
.on-night .index-row p{color:var(--night-muted)}

/* ---------- margin guard band ---------- */
.mg-band{background:var(--night);color:var(--night-text);padding:140px 0}
.mg-grid{display:grid;grid-template-columns:.92fr 1.08fr;gap:88px;align-items:center}
.mg-grid .kicker{margin-bottom:26px}
.mg-grid .h-section{margin-bottom:24px}
.mg-grid .lede{max-width:42ch}
.mg-grid .mg-actions{margin-top:38px;display:flex;gap:14px;flex-wrap:wrap}
.panel{
  background:var(--night-2);border:1px solid var(--night-hairline);border-radius:10px;
  padding:26px 26px 14px;font-size:.8rem;font-variant-numeric:tabular-nums;
}
.panel-head{display:flex;justify-content:space-between;align-items:flex-end;padding-bottom:20px;border-bottom:1px solid var(--night-hairline)}
.panel-head .ph-label{font-size:.66rem;letter-spacing:.13em;text-transform:uppercase;color:var(--night-faint)}
.panel-head strong{display:block;font-size:2.1rem;font-weight:640;letter-spacing:-.02em;margin-top:8px;color:#fff}
.panel-head .ph-flag{color:var(--amber);font-size:.76rem;font-weight:600}
.job-row{
  display:grid;grid-template-columns:1.35fr .95fr 82px 96px;gap:14px;align-items:center;
  padding:16px 0;border-bottom:1px solid rgba(29,39,64,.6);
}
.job-row:last-child{border-bottom:0}
.job-row b{font-weight:600;color:#f2f5fa;font-size:.82rem}
.job-row .job-sig{color:var(--night-muted);font-size:.74rem}
.job-row .delta{text-align:right;font-weight:640;font-size:.82rem}
.delta.bad{color:var(--red)}
.delta.warn{color:var(--amber)}
.delta.good{color:var(--green)}
.job-row .job-act{text-align:right;color:var(--night-faint);font-size:.72rem}
.job-row .job-act.hot{color:#fff;font-weight:600}
.panel-note{padding:12px 0 4px;font-size:.7rem;color:var(--night-faint)}

/* ---------- closing statement ---------- */
.closing{padding:160px 0}
.closing h2{max-width:20ch}
.closing h2 .dim{color:#b3b8bf}
.closing .body-copy{margin-top:30px;max-width:52ch;font-size:1.1rem}
.closing .closing-ctas{margin-top:44px;display:flex;gap:14px;flex-wrap:wrap}

/* ---------- footer ---------- */
.footer{border-top:1px solid var(--hairline);padding:64px 0 56px;background:var(--paper)}
.footer-grid{display:flex;gap:60px;align-items:flex-start;justify-content:space-between;flex-wrap:wrap}
.footer .brand{font-size:1.05rem}
.footer .brand img{width:21px;height:21px}
.footer-tag{margin-top:14px;font-size:.85rem;color:var(--muted);max-width:26ch;line-height:1.6}
.footer-cols{display:flex;gap:72px;flex-wrap:wrap}
.footer-col h4{font-size:.68rem;letter-spacing:.13em;text-transform:uppercase;color:var(--faint);font-weight:640;margin-bottom:16px}
.footer-col a{display:block;font-size:.88rem;color:var(--ink-soft);padding:5px 0}
.footer-col a:hover{color:var(--ink)}
.footer-base{margin-top:56px;padding-top:24px;border-top:1px solid var(--hairline);display:flex;justify-content:space-between;gap:20px;font-size:.76rem;color:var(--faint);flex-wrap:wrap}

/* ---------- interior pages ---------- */
.page-hero{padding:110px 0 90px}
.page-hero .kicker{margin-bottom:32px}
.page-hero h1{font-size:clamp(2.9rem,6vw,6rem);line-height:.97;letter-spacing:-.04em;font-weight:650;max-width:15ch}
.page-hero .lede{margin-top:36px;max-width:52ch}
.page-hero .hero-actions{margin-top:40px;display:flex;gap:14px;flex-wrap:wrap}

.prose{max-width:640px}
.prose p{margin-bottom:1.6em;color:var(--ink-soft);font-size:1.08rem;line-height:1.7}
.prose p:last-child{margin-bottom:0}
.prose strong{color:var(--ink);font-weight:640}

.statement{padding:140px 0;border-top:1px solid var(--hairline)}
.statement p{font-size:clamp(1.7rem,3.2vw,3.1rem);line-height:1.16;letter-spacing:-.028em;font-weight:620;max-width:26ch}
.on-night .statement{border-color:var(--night-hairline)}

.big-index{border-top:1px solid var(--hairline)}
.big-index-row{
  display:grid;grid-template-columns:120px 1fr .9fr;gap:44px;align-items:start;
  padding:64px 0;border-bottom:1px solid var(--hairline);
}
.big-index-row .num{font-size:.8rem;color:var(--faint);padding-top:14px;font-variant-numeric:tabular-nums}
.big-index-row h3{font-size:clamp(1.9rem,3vw,2.9rem);letter-spacing:-.028em;font-weight:640;line-height:1.04}
.big-index-row h3 small{display:block;font-size:.78rem;font-weight:600;letter-spacing:.12em;text-transform:uppercase;color:var(--faint);margin-top:16px}
.big-index-row .bi-copy{color:var(--muted);line-height:1.65;max-width:44ch;padding-top:10px}
.big-index-row .bi-copy .text-link{display:inline-block;margin-top:24px;color:var(--ink)}
.big-index-row.quiet h3{color:var(--faint)}

.cta-final{padding:150px 0}
.cta-final h2{max-width:18ch;margin-bottom:34px}
.cta-final .body-copy{max-width:48ch;margin-bottom:42px;font-size:1.08rem}

/* margin guard page */
.mg-visual-wrap{padding-bottom:20px}
.gap-line{display:grid;grid-template-columns:repeat(3,1fr);gap:52px;border-top:1px solid var(--night-hairline);padding-top:0;position:relative}
.gap-step{padding-top:36px;position:relative}
.gap-step::before{content:"";position:absolute;top:-1px;left:0;width:44px;height:2px;background:var(--night-faint)}
.gap-step.gap-hot::before{background:var(--grad)}
.gap-step b{display:block;font-size:1rem;font-weight:640;margin-bottom:10px}
.gap-step p{font-size:.88rem;color:var(--night-muted);line-height:1.6;max-width:30ch}
.gap-step .gs-tag{display:inline-block;font-size:.66rem;letter-spacing:.13em;text-transform:uppercase;color:var(--night-faint);margin-bottom:14px}

/* reveal */
@media (prefers-reduced-motion: no-preference){
  .reveal{opacity:0;transform:translateY(18px);transition:opacity .7s ease,transform .7s ease}
  .reveal.in{opacity:1;transform:none}
}

/* ---------- responsive ---------- */
@media(max-width:1180px){
  .shell{width:min(var(--shell),100% - 56px)}
  .app-body{grid-template-columns:172px 1fr}
  .app-side{display:none}
  .split{gap:56px}
  .mg-grid{gap:56px}
}
@media(max-width:960px){
  .nav-links,.nav-actions{display:none}
  .menu-btn{display:block}
  .hero{padding:72px 0 60px}
  .hero-row{grid-template-columns:1fr;gap:34px;align-items:start;margin-top:36px}
  .hero-ctas{justify-content:flex-start}
  .split{grid-template-columns:1fr}
  .mg-grid{grid-template-columns:1fr;align-items:start}
  .loop-track{grid-template-columns:1fr;gap:0}
  .loop-track::before{top:0;bottom:0;left:5px;right:auto;width:1px;height:auto;background:linear-gradient(180deg,var(--night-hairline) 0%,var(--night-hairline) 82%,transparent)}
  .loop-step{padding:0 0 44px 36px}
  .loop-step::before{top:4px}
  .loop-step:last-child{padding-bottom:0}
  .loop-head{margin-bottom:64px}
  .index-row{grid-template-columns:52px 1fr;grid-template-rows:auto auto}
  .index-row p{grid-column:2}
  .big-index-row{grid-template-columns:64px 1fr;gap:24px}
  .big-index-row .bi-copy{grid-column:2}
  .band{padding:96px 0}
  .thesis,.closing,.statement,.cta-final,.mg-band{padding:100px 0}
}
@media(max-width:640px){
  .shell,.shell-wide{width:min(100% - 40px,var(--shell))}
  .nav-row{height:64px}
  .mobile-menu.open{top:64px}
  .hero{padding:56px 0 44px}
  .hero .kicker{margin-bottom:26px}
  .display{font-size:clamp(2.9rem,13vw,4rem)}
  .page-hero{padding:72px 0 60px}
  .page-hero h1{font-size:clamp(2.4rem,11vw,3.4rem)}
  .app{font-size:.76rem}
  .app-body{grid-template-columns:1fr;min-height:0}
  .app-rail{display:none}
  .app-main{padding:20px 18px}
  .work-row{grid-template-columns:1.5fr .9fr;row-gap:6px}
  .work-row .work-ctx,.work-row .work-time{display:none}
  .job-row{grid-template-columns:1.3fr 76px}
  .job-row .job-sig,.job-row .job-act{display:none}
  .panel{padding:20px 18px 10px}
  .index-row{padding:26px 0}
  .big-index-row{padding:44px 0}
  .footer-cols{gap:40px}
  .gap-line{grid-template-columns:1fr;gap:36px}
  .thesis p{font-size:clamp(1.55rem,7.4vw,2rem)}
  .band,.thesis,.closing,.statement,.cta-final,.mg-band{padding:80px 0}
  .loop-step p{max-width:none}
}