/* ============================================================
   NEXUS RESEARCH LABS
   Palette: midnight ink + two accents with roles —
     aqua  = the machine (telemetry, uptime, systems)
     ember = the human (affect, care, health)
   ============================================================ */
:root{
  --ink:      #080B12;
  --ink-2:    #0D111B;
  --panel:    #111726;
  --panel-2:  #141B2C;
  --line:     #1F2739;
  --line-2:   #2B3550;
  --mist:     #94A1BC;
  --mist-dim: #6B778F;
  --paper:    #E9EEF9;
  --aqua:     #6FDCD2;
  --aqua-dim: #3C8F8B;
  --ember:    #FFB48A;
  --ember-dim:#B87A57;
  --violet:   #2A3560;

  --f-display: "Bricolage Grotesque", ui-sans-serif, system-ui, sans-serif;
  --f-body:    "Instrument Sans", ui-sans-serif, system-ui, sans-serif;
  --f-mono:    "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;

  --pad: clamp(1.25rem, 4vw, 3rem);
  --max: 1240px;
  --rail: 190px;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  background:var(--ink);
  color:var(--paper);
  font-family:var(--f-body);
  font-size:clamp(1rem,0.97rem + 0.15vw,1.0625rem);
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
:focus-visible{outline:2px solid var(--aqua);outline-offset:3px;border-radius:2px}

/* ---------- type ---------- */
h1,h2,h3,h4{
  font-family:var(--f-display);
  font-weight:600;
  font-variation-settings:"wdth" 92;
  letter-spacing:-0.032em;
  line-height:1.03;
  margin:0;
  text-wrap:balance;
}
.h-display{font-size:clamp(2.7rem,7vw,5.1rem);line-height:0.97;font-weight:500}
.h-1{font-size:clamp(2.1rem,4.6vw,3.4rem)}
.h-2{font-size:clamp(1.55rem,2.6vw,2.1rem)}
.h-3{font-size:clamp(1.15rem,1.6vw,1.35rem);letter-spacing:-0.02em}
p{margin:0 0 1.1em}
.lede{font-size:clamp(1.08rem,1.05rem + 0.4vw,1.32rem);line-height:1.55;color:var(--mist);max-width:62ch}
.body-dim{color:var(--mist)}
strong{font-weight:600;color:var(--paper)}

.mono{
  font-family:var(--f-mono);
  font-size:0.72rem;
  font-weight:400;
  letter-spacing:0.14em;
  text-transform:uppercase;
}
.path{
  font-family:var(--f-mono);
  font-size:0.73rem;
  letter-spacing:0.06em;
  color:var(--aqua-dim);
  text-transform:none;
}
.path::before{content:"~/";color:var(--line-2)}

/* ---------- layout ---------- */
.wrap{width:100%;max-width:var(--max);margin-inline:auto;padding-inline:var(--pad)}
.section{padding-block:clamp(4.5rem,9vw,8rem);position:relative}
.section--tight{padding-block:clamp(3rem,6vw,5rem)}
.rule{height:1px;background:var(--line);border:0;margin:0}
.rule--glow{
  height:1px;border:0;margin:0;
  background:linear-gradient(90deg,transparent,var(--line-2) 18%,var(--aqua-dim) 50%,var(--line-2) 82%,transparent);
  opacity:.5;
}

/* rail = mono label on the left, content on the right (reads like a runbook) */
.rail{display:grid;grid-template-columns:var(--rail) minmax(0,1fr);gap:clamp(1.5rem,3vw,3.5rem)}
.rail__label{position:sticky;top:6.5rem;align-self:start}
.rail__label .kicker{display:block;color:var(--mist-dim);margin-top:.6rem;font-family:var(--f-mono);font-size:.7rem;line-height:1.5;letter-spacing:.04em}
@media (max-width:860px){
  .rail{grid-template-columns:1fr;gap:1.25rem}
  .rail__label{position:static}
}

/* ---------- nav ---------- */
.nav{
  position:sticky;top:0;z-index:60;
  backdrop-filter:blur(14px);
  background:color-mix(in oklab, var(--ink) 82%, transparent);
  border-bottom:1px solid var(--line);
}
.nav__in{display:flex;align-items:center;gap:1.5rem;height:68px}
.brand{display:flex;align-items:baseline;gap:.6rem;margin-right:auto;min-width:0}
.brand__mark{
  font-family:var(--f-display);font-weight:700;font-size:1.14rem;
  font-variation-settings:"wdth" 78;letter-spacing:-0.02em;
}
.brand__sub{
  font-family:var(--f-mono);font-size:.62rem;letter-spacing:.22em;text-transform:uppercase;
  color:var(--mist-dim);white-space:nowrap;
}
.brand__dot{width:6px;height:6px;border-radius:50%;background:var(--aqua);box-shadow:0 0 10px var(--aqua);flex:none;align-self:center}
.nav__links{display:flex;gap:.25rem;align-items:center}
.nav__link{
  font-family:var(--f-mono);font-size:.72rem;letter-spacing:.1em;text-transform:uppercase;
  color:var(--mist);padding:.5rem .7rem;border-radius:6px;transition:color .18s,background .18s;
}
.nav__link:hover{color:var(--paper);background:var(--panel)}
.nav__link[aria-current="page"]{color:var(--aqua)}
.nav__toggle{display:none;background:none;border:1px solid var(--line-2);color:var(--paper);border-radius:6px;padding:.45rem .7rem;font-family:var(--f-mono);font-size:.7rem;letter-spacing:.1em;cursor:pointer}
@media (max-width:820px){
  .nav__links{
    position:absolute;top:68px;left:0;right:0;flex-direction:column;align-items:stretch;gap:0;
    background:var(--ink-2);border-bottom:1px solid var(--line);padding:.5rem var(--pad) 1rem;
    display:none;
  }
  .nav__links.open{display:flex}
  .nav__link{padding:.85rem .25rem;border-bottom:1px solid var(--line)}
  .nav__links .btn{margin-top:.9rem;justify-content:center}
  .nav__toggle{display:block}
  .brand__sub{display:none}
}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;gap:.6rem;
  font-family:var(--f-mono);font-size:.73rem;letter-spacing:.1em;text-transform:uppercase;
  padding:.78rem 1.15rem;border-radius:7px;border:1px solid var(--line-2);
  color:var(--paper);background:var(--panel);
  transition:border-color .18s,background .18s,transform .18s,color .18s;
  cursor:pointer;
}
.btn:hover{border-color:var(--aqua-dim);background:var(--panel-2);transform:translateY(-1px)}
.btn--primary{background:var(--aqua);color:#04231F;border-color:var(--aqua);font-weight:500}
.btn--primary:hover{background:#8AE9E0;border-color:#8AE9E0;color:#04231F}
.btn--ghost{background:transparent}
.btn__arrow{transition:transform .18s}
.btn:hover .btn__arrow{transform:translateX(3px)}

/* ---------- hero ---------- */
.hero{position:relative;padding-top:clamp(3rem,7vw,5.5rem);padding-bottom:0;overflow:hidden}
.hero__glow{
  position:absolute;inset:-30% -10% auto -10%;height:120%;pointer-events:none;
  background:
    radial-gradient(46% 42% at 22% 30%, rgba(111,220,210,.13), transparent 70%),
    radial-gradient(40% 40% at 78% 20%, rgba(255,180,138,.10), transparent 70%),
    radial-gradient(60% 50% at 50% 0%, rgba(42,53,96,.35), transparent 75%);
  filter:blur(2px);
}
.hero__in{position:relative;display:grid;grid-template-columns:minmax(0,1.35fr) minmax(0,.85fr);gap:clamp(1.5rem,4vw,4rem);align-items:end}
@media (max-width:900px){.hero__in{grid-template-columns:1fr;align-items:start}}
.hero__eyebrow{display:flex;flex-wrap:wrap;gap:.5rem .9rem;align-items:center;color:var(--mist-dim);margin-bottom:1.6rem}
.hero__eyebrow span{display:inline-flex;align-items:center;gap:.5rem}
.hero__eyebrow span::before{content:"";width:4px;height:4px;background:var(--line-2);border-radius:50%}
.hero__eyebrow span:first-child::before{background:var(--aqua)}
.hero h1 em{font-style:normal;color:var(--aqua)}
.hero__lede{margin-top:1.6rem}
.hero__cta{display:flex;flex-wrap:wrap;gap:.7rem;margin-top:2.2rem}
.hero__aside{
  border-left:1px solid var(--line);padding-left:clamp(1rem,2vw,1.8rem);
}
@media (max-width:900px){.hero__aside{border-left:0;border-top:1px solid var(--line);padding-left:0;padding-top:1.5rem;margin-top:2.5rem}}
.hero__aside p{color:var(--mist);font-size:.95rem;margin-bottom:.9rem}

/* trace (signature element) */
.trace{position:relative;margin-top:clamp(2.5rem,5vw,4rem)}
.trace canvas{display:block;width:100%;height:190px}
@media (max-width:700px){.trace canvas{height:140px}}
.trace__legend{
  display:flex;flex-wrap:wrap;gap:.4rem 1.4rem;align-items:center;
  border-top:1px solid var(--line);padding-top:.75rem;margin-top:.25rem;
  font-family:var(--f-mono);font-size:.66rem;letter-spacing:.12em;text-transform:uppercase;color:var(--mist-dim);
}
.trace__legend b{font-weight:400;display:inline-flex;align-items:center;gap:.45rem}
.swatch{width:14px;height:2px;display:inline-block}
.swatch--aqua{background:var(--aqua)}
.swatch--ember{background:var(--ember)}
.trace__legend .right{margin-left:auto}

/* ---------- spec strip ---------- */
.spec{display:grid;grid-template-columns:repeat(4,1fr);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
@media (max-width:800px){.spec{grid-template-columns:repeat(2,1fr)}}
.spec__cell{padding:1.3rem 1.2rem 1.4rem;border-right:1px solid var(--line)}
.spec__cell:last-child{border-right:0}
@media (max-width:800px){
  .spec__cell:nth-child(2n){border-right:0}
  .spec__cell:nth-child(-n+2){border-bottom:1px solid var(--line)}
}
.spec__k{font-family:var(--f-mono);font-size:.65rem;letter-spacing:.18em;text-transform:uppercase;color:var(--mist-dim)}
.spec__v{font-family:var(--f-display);font-weight:500;font-size:1.05rem;font-variation-settings:"wdth" 88;margin-top:.45rem;letter-spacing:-0.01em}

/* ---------- cards / lists ---------- */
.stack{display:grid;gap:1px;background:var(--line);border:1px solid var(--line);border-radius:10px;overflow:hidden}
.stack__item{background:var(--ink-2);padding:clamp(1.3rem,2.4vw,1.9rem);transition:background .2s}
.stack__item:hover{background:var(--panel)}
.stack__head{display:flex;align-items:baseline;gap:.9rem;flex-wrap:wrap}
.tag{
  font-family:var(--f-mono);font-size:.63rem;letter-spacing:.14em;text-transform:uppercase;
  color:var(--aqua-dim);border:1px solid var(--line-2);border-radius:99px;padding:.2rem .55rem;white-space:nowrap;
}
.tag--ember{color:var(--ember-dim)}
.stack__item p{margin:.7rem 0 0;color:var(--mist);max-width:66ch;font-size:.97rem}

.grid-2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:1.1rem}
.grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:1.1rem}
@media (max-width:900px){.grid-3{grid-template-columns:1fr}.grid-2{grid-template-columns:1fr}}
.card{
  border:1px solid var(--line);border-radius:10px;padding:clamp(1.3rem,2.2vw,1.7rem);
  background:linear-gradient(180deg,var(--ink-2),var(--ink));
  transition:border-color .2s,transform .2s;
}
.card:hover{border-color:var(--line-2);transform:translateY(-2px)}
.card p{margin:.65rem 0 0;color:var(--mist);font-size:.95rem}
.card__num{font-family:var(--f-mono);font-size:.66rem;letter-spacing:.16em;color:var(--mist-dim);display:block;margin-bottom:.9rem}

.checks{list-style:none;margin:0;padding:0;display:grid;gap:.55rem}
.checks li{position:relative;padding-left:1.35rem;color:var(--mist);font-size:.96rem}
.checks li::before{
  content:"";position:absolute;left:0;top:.62em;width:7px;height:1px;background:var(--aqua-dim);
}

/* ---------- feature band (human side) ---------- */
.band{
  border:1px solid var(--line);border-radius:14px;overflow:hidden;
  background:
    radial-gradient(90% 120% at 100% 0%, rgba(255,180,138,.10), transparent 60%),
    linear-gradient(180deg,var(--ink-2),var(--ink));
}
.band__in{padding:clamp(1.8rem,4vw,3.4rem)}
.quote{
  font-family:var(--f-display);font-weight:400;font-variation-settings:"wdth" 95;
  font-size:clamp(1.35rem,2.6vw,2rem);line-height:1.25;letter-spacing:-0.025em;
  color:var(--paper);max-width:26ch;margin:0;
}
.quote span{color:var(--ember)}

/* ---------- blog ---------- */
.post{
  display:grid;grid-template-columns:120px minmax(0,1fr) auto;gap:1.5rem;align-items:start;
  padding:1.5rem 0;border-bottom:1px solid var(--line);transition:padding-left .2s;
}
.post:hover{padding-left:.5rem}
.post:hover .post__title{color:var(--aqua)}
.post__date{font-family:var(--f-mono);font-size:.68rem;letter-spacing:.1em;color:var(--mist-dim);padding-top:.35rem}
.post__title{font-family:var(--f-display);font-weight:500;font-size:clamp(1.1rem,1.8vw,1.4rem);font-variation-settings:"wdth" 92;letter-spacing:-0.025em;transition:color .2s}
.post__ex{margin:.5rem 0 0;color:var(--mist);font-size:.95rem;max-width:70ch}
.post__meta{font-family:var(--f-mono);font-size:.66rem;letter-spacing:.1em;color:var(--mist-dim);white-space:nowrap;padding-top:.4rem;text-transform:uppercase}
@media (max-width:820px){
  .post{grid-template-columns:1fr;gap:.5rem}
  .post__meta{padding-top:.3rem}
}
.featured{
  border:1px solid var(--line);border-radius:14px;padding:clamp(1.6rem,3.5vw,2.8rem);
  background:radial-gradient(80% 130% at 0% 0%, rgba(111,220,210,.09), transparent 60%), var(--ink-2);
}

/* ---------- CTA + footer ---------- */
.cta{border-top:1px solid var(--line);background:linear-gradient(180deg,var(--ink),var(--ink-2))}
.cta__in{display:flex;flex-wrap:wrap;gap:2rem;align-items:end;justify-content:space-between}
.foot{border-top:1px solid var(--line);padding-block:2.5rem 3rem;color:var(--mist-dim)}
.foot__in{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:2rem}
@media (max-width:760px){.foot__in{grid-template-columns:1fr 1fr}}
.foot h4{font-family:var(--f-mono);font-size:.65rem;letter-spacing:.18em;text-transform:uppercase;color:var(--mist-dim);font-weight:400;margin-bottom:.9rem}
.foot a{color:var(--mist);font-size:.92rem;display:block;padding:.22rem 0;transition:color .18s}
.foot a:hover{color:var(--aqua)}
.foot__bottom{display:flex;flex-wrap:wrap;gap:1rem;justify-content:space-between;margin-top:2.5rem;padding-top:1.3rem;border-top:1px solid var(--line);font-family:var(--f-mono);font-size:.66rem;letter-spacing:.1em;color:var(--mist-dim)}
.status{display:inline-flex;align-items:center;gap:.5rem}
.status__dot{width:6px;height:6px;border-radius:50%;background:var(--aqua);box-shadow:0 0 8px var(--aqua);animation:pulse 3.4s ease-in-out infinite}
@keyframes pulse{0%,100%{opacity:.35}50%{opacity:1}}

/* ---------- reveal ---------- */
.rv{opacity:0;transform:translateY(14px);transition:opacity .7s cubic-bezier(.2,.7,.3,1),transform .7s cubic-bezier(.2,.7,.3,1)}
.rv.in{opacity:1;transform:none}

@media (prefers-reduced-motion:reduce){
  *{animation-duration:.001ms!important;animation-iteration-count:1!important;transition-duration:.001ms!important}
  html{scroll-behavior:auto}
  .rv{opacity:1;transform:none}
}