/* ===== ArcumAI · styles ===== */
:root{
  --ink:#0F2A31; --ink-2:#0b2127;
  --teal:#2C6573; --surface:#143840; --surface-2:#1a4651;
  --green:#56BE84; --green-br:#7FD7A2;
  --silver:#EAF1F0; --white:#F5F8F8; --muted:#9FBAC0;
  --line:rgba(159,186,192,.16); --line-green:rgba(127,215,162,.35);
  --font-sans:system-ui,-apple-system,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  --font-mono:ui-monospace,SFMono-Regular,"SF Mono",Menlo,Consolas,"Liberation Mono",monospace;
  --wrap:1140px; --r:16px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0; font-family:var(--font-sans); color:var(--silver);
  background-color:var(--ink-2);
  background-image:
    radial-gradient(1100px 700px at 78% -120px, rgba(86,190,132,.18), transparent 60%),
    radial-gradient(900px 620px at -120px 120px, rgba(44,101,115,.6), transparent 58%);
  background-repeat:no-repeat;
  line-height:1.65; -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none}
.wrap{width:100%;max-width:var(--wrap);margin-inline:auto;padding-inline:24px}
.skip{position:absolute;left:-999px;top:0;background:var(--green);color:#06231a;padding:10px 16px;border-radius:8px;z-index:100}
.skip:focus{left:16px;top:16px}

/* ---- type ---- */
.eyebrow{font:600 13px/1 var(--font-sans);letter-spacing:.22em;text-transform:uppercase;color:var(--green-br);margin:0 0 18px}
.eyebrow--code{font-family:var(--font-mono);letter-spacing:.06em;font-weight:500;color:var(--green)}
.h2{font:800 clamp(28px,4.4vw,46px)/1.08 var(--font-sans);letter-spacing:-.02em;color:var(--white);margin:0}
h3{font:700 19px/1.25 var(--font-sans);color:var(--white);margin:0 0 8px;letter-spacing:-.01em}
p{margin:0 0 14px}

/* ---- buttons ---- */
.btn{display:inline-flex;align-items:center;gap:9px;font:600 15px var(--font-sans);
  padding:11px 18px;border-radius:11px;border:1px solid transparent;cursor:pointer;
  transition:transform .18s ease,box-shadow .25s ease,background .2s ease,border-color .2s}
.btn img{opacity:.95}
.btn--solid{background:linear-gradient(180deg,var(--green-br),var(--green));color:#06231a;
  box-shadow:0 8px 24px -10px rgba(86,190,132,.8)}
.btn--solid:hover{transform:translateY(-2px);box-shadow:0 14px 30px -10px rgba(86,190,132,.9)}
.btn--ghost{background:rgba(255,255,255,.03);border-color:var(--line);color:var(--silver)}
.btn--ghost:hover{border-color:var(--line-green);background:rgba(127,215,162,.08);transform:translateY(-2px)}
.btn--lg{padding:14px 22px;font-size:16px;border-radius:13px}
:focus-visible{outline:2px solid var(--green-br);outline-offset:3px;border-radius:6px}

/* ===== NAV ===== */
.nav{position:sticky;top:0;z-index:50;
  background:rgba(11,33,39,.72);backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line)}
.nav__inner{display:flex;align-items:center;justify-content:space-between;min-height:68px}
.nav__brand img{height:38px;width:auto}
.nav__menu{display:flex;align-items:center;gap:26px}
.nav__menu a:not(.btn){font-weight:500;color:var(--muted);font-size:15px;transition:color .2s}
.nav__menu a:not(.btn):hover{color:var(--white)}
.nav__check,.nav__burger{display:none}
/* language switcher */
.nav__lang{display:inline-flex;gap:2px;padding:3px;border:1px solid var(--line);
  border-radius:10px;background:rgba(255,255,255,.03)}
.nav__lang a{font:600 12px var(--font-mono);letter-spacing:.04em;color:var(--muted);
  padding:5px 9px;border-radius:7px;transition:color .18s,background .18s}
.nav__lang a:hover{color:var(--white)}
.nav__lang a.is-active{background:var(--green);color:#06231a}
.nav__burger{flex-direction:column;gap:5px;width:42px;height:38px;justify-content:center;
  align-items:center;cursor:pointer;border-radius:9px;border:1px solid var(--line)}
.nav__burger span{width:20px;height:2px;background:var(--silver);border-radius:2px;transition:.25s}

/* ===== HERO ===== */
.hero{padding:clamp(48px,8vw,96px) 0 56px}
.hero__grid{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center}
.hero__title{font:800 clamp(34px,6vw,62px)/1.04 var(--font-sans);letter-spacing:-.03em;
  color:var(--white);margin:0 0 22px;
  animation:rise .7s cubic-bezier(.2,.7,.2,1) both}
.hero__lead{font-size:clamp(16px,1.6vw,18.5px);color:#C6D6D8;max-width:38ch;margin:0 0 28px;
  animation:rise .7s .08s cubic-bezier(.2,.7,.2,1) both}
.hero__cta{display:flex;flex-wrap:wrap;gap:12px;animation:rise .7s .16s cubic-bezier(.2,.7,.2,1) both}
.hero__meta{margin-top:20px;font:500 13.5px var(--font-mono);color:var(--muted);letter-spacing:.02em}
.eyebrow{animation:rise .7s both}
@keyframes rise{from{opacity:0;transform:translateY(14px)}to{opacity:1;transform:none}}

/* trust strip */
.trust{display:flex;flex-wrap:wrap;gap:10px 28px;list-style:none;margin:54px auto 0;padding:18px 24px 0;
  border-top:1px solid var(--line)}
.trust li{font:500 13px var(--font-mono);text-transform:uppercase;letter-spacing:.14em;color:var(--muted)}
.trust li::before{content:"▪";color:var(--green);margin-right:9px;font-size:11px}

/* ===== SIGNATURE: the secure perimeter ===== */
.vault{position:relative;margin:0;padding:30px 26px 26px;border-radius:22px;
  border:1.5px solid var(--line-green);overflow:hidden;
  background:
    linear-gradient(180deg,rgba(20,56,64,.85),rgba(11,33,39,.85)),
    repeating-linear-gradient(0deg,transparent 0 23px,rgba(127,215,162,.05) 23px 24px),
    repeating-linear-gradient(90deg,transparent 0 23px,rgba(127,215,162,.05) 23px 24px);
  box-shadow:0 30px 70px -30px rgba(0,0,0,.7),inset 0 0 60px rgba(86,190,132,.06);
  animation:breathe 6s ease-in-out infinite}
@keyframes breathe{0%,100%{border-color:var(--line-green)}50%{border-color:rgba(127,215,162,.6)}}
.vault__label{position:absolute;top:14px;left:18px;font:600 11px var(--font-mono);
  letter-spacing:.2em;text-transform:uppercase;color:var(--green-br)}
.vault__scan{position:absolute;left:0;right:0;top:0;height:64px;pointer-events:none;
  background:linear-gradient(180deg,rgba(127,215,162,.16),transparent);
  animation:scan 5.5s linear infinite}
@keyframes scan{0%{transform:translateY(-64px)}100%{transform:translateY(360px)}}

.vault__core{display:flex;align-items:center;justify-content:center;gap:6px;margin:40px 4px 30px}
.node{display:flex;flex-direction:column;align-items:center;gap:7px;flex:0 0 auto;
  font:600 12px var(--font-sans);color:var(--silver);text-align:center;width:78px}
.node__dot{width:38px;height:38px;border-radius:12px;border:1.5px solid var(--line-green);
  background:radial-gradient(circle at 50% 38%,rgba(127,215,162,.4),rgba(20,56,64,.6));
  animation:glow 2.6s ease-in-out infinite}
.node--ret .node__dot{animation-delay:1.3s}
@keyframes glow{0%,100%{box-shadow:0 0 0 0 rgba(127,215,162,.0)}50%{box-shadow:0 0 18px 2px rgba(127,215,162,.45)}}
.node--brain{width:96px}
.node--brain img{width:62px;height:62px;filter:drop-shadow(0 6px 16px rgba(86,190,132,.35))}
.node--brain small{font:600 11px var(--font-mono);letter-spacing:.06em;color:var(--green-br);text-transform:uppercase}
.wire{position:relative;flex:1 1 auto;max-width:74px;height:2px;border-radius:2px;
  background:linear-gradient(90deg,rgba(127,215,162,.15),rgba(127,215,162,.5),rgba(127,215,162,.15))}
.pulse{position:absolute;top:50%;left:0;width:9px;height:9px;margin-top:-4.5px;border-radius:50%;
  background:var(--green-br);box-shadow:0 0 10px 2px rgba(127,215,162,.8);
  animation:flow 2.4s linear infinite}
.pulse--rev{animation:flowrev 2.4s linear infinite;animation-delay:1.2s}
@keyframes flow{0%{left:-4px;opacity:0}12%{opacity:1}88%{opacity:1}100%{left:calc(100% - 4px);opacity:0}}
@keyframes flowrev{0%{left:calc(100% - 4px);opacity:0}12%{opacity:1}88%{opacity:1}100%{left:-4px;opacity:0}}

.vault__exit{display:flex;align-items:center;justify-content:center;gap:10px;
  padding-top:18px;border-top:1px dashed var(--line)}
.exit__route{width:34px;height:2px;background:repeating-linear-gradient(90deg,var(--muted) 0 5px,transparent 5px 10px);opacity:.5}
.exit__block{font:700 10px var(--font-mono);letter-spacing:.18em;text-transform:uppercase;
  color:#e98c8c;border:1px solid rgba(233,140,140,.5);border-radius:7px;padding:4px 8px;
  position:relative;animation:blockpulse 2.8s ease-in-out infinite}
@keyframes blockpulse{0%,100%{box-shadow:0 0 0 0 rgba(233,140,140,0)}50%{box-shadow:0 0 14px 0 rgba(233,140,140,.35)}}
.exit__cloud{font:500 12px var(--font-sans);color:var(--muted);opacity:.55;
  border:1px dashed var(--line);border-radius:9px;padding:6px 12px}

/* ===== SECTIONS ===== */
.section{padding:clamp(60px,8vw,104px) 0}
section[id]{scroll-margin-top:84px}
.band{padding:clamp(60px,8vw,104px) 0;background:rgba(20,56,64,.4);
  border-block:1px solid var(--line)}
.section__head{margin-bottom:48px;max-width:30ch}
.split{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:start}
.split__body p:last-child,.split__note{margin-bottom:0}
.split__body p{font-size:17px;color:#C6D6D8}
.lead-green{color:var(--green-br)!important;font-weight:600;font-size:19px!important}
.split__note{color:var(--muted);margin-top:18px;max-width:42ch}

/* capability cards */
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.cards--3{grid-template-columns:repeat(3,1fr)}
.card{padding:26px 24px;border-radius:var(--r);border:1px solid var(--line);
  background:linear-gradient(180deg,rgba(255,255,255,.035),rgba(255,255,255,.012));
  transition:transform .22s ease,border-color .22s ease,box-shadow .25s ease}
.card:hover{transform:translateY(-4px);border-color:var(--line-green);
  box-shadow:0 22px 44px -26px rgba(86,190,132,.55)}
.card__icon{width:46px;height:46px;margin-bottom:16px;
  filter:drop-shadow(0 4px 10px rgba(86,190,132,.3));transition:transform .22s}
.card:hover .card__icon{transform:scale(1.08) rotate(-2deg)}
.card p{color:var(--muted);margin:0;font-size:15px}

/* flow */
.flow{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(5,1fr);gap:14px;counter-reset:s}
.step{position:relative;padding:24px 18px;border-radius:14px;border:1px solid var(--line);
  background:rgba(11,33,39,.5)}
.step__n{font:800 13px var(--font-mono);color:var(--green);letter-spacing:.1em}
.step h3{font-size:17px;margin:10px 0 6px}
.step p{font-size:13.5px;color:var(--muted);margin:0}
.step:not(:last-child)::after{content:"";position:absolute;top:50%;right:-9px;width:10px;height:10px;
  border-top:2px solid var(--line-green);border-right:2px solid var(--line-green);
  transform:translateY(-50%) rotate(45deg)}
.flow__foot{margin-top:26px;color:var(--muted);font-size:15px;max-width:70ch}

/* chips */
.chips{display:flex;flex-wrap:wrap;gap:11px;align-content:flex-start}
.chip{font:600 14px var(--font-mono);letter-spacing:.01em;color:var(--silver);
  padding:9px 15px;border-radius:999px;border:1px solid var(--line-green);
  background:rgba(127,215,162,.06);transition:background .2s,transform .2s}
.chip:hover{background:rgba(127,215,162,.14);transform:translateY(-2px)}
.chip--muted{color:var(--muted);border-color:var(--line);border-style:dashed;
  background:none;text-transform:none;font-family:var(--font-sans);font-weight:500}

/* use cases */
.usecase{padding:30px 26px;border-radius:var(--r);border:1px solid var(--line);
  background:linear-gradient(180deg,rgba(255,255,255,.035),transparent);
  border-top:2px solid var(--green);transition:transform .22s,box-shadow .25s}
.usecase:hover{transform:translateY(-4px);box-shadow:0 22px 44px -26px rgba(86,190,132,.5)}
.usecase p{color:var(--muted);margin:0;font-size:15px}

/* CTA */
.cta{padding:clamp(64px,9vw,118px) 0;text-align:center}
.cta__inner{max-width:660px}
.cta__mark{margin:0 auto 22px;width:78px;height:78px;
  filter:drop-shadow(0 10px 26px rgba(86,190,132,.4))}
.cta p{color:#C6D6D8;font-size:18px;margin:16px auto 30px;max-width:48ch}
.cta .hero__cta{justify-content:center}

/* footer */
.foot{border-top:1px solid var(--line);padding:34px 0;background:rgba(11,33,39,.6)}
.foot__inner{display:flex;flex-wrap:wrap;gap:18px 30px;align-items:center;justify-content:space-between}
.foot__brand{display:flex;align-items:center;gap:11px;font:700 17px var(--font-sans);color:var(--white)}
.foot__links{display:flex;gap:24px}
.foot__links a{color:var(--muted);font-size:15px;transition:color .2s}
.foot__links a:hover{color:var(--green-br)}
.foot__fine{margin:0;color:var(--muted);font:500 13px var(--font-mono);letter-spacing:.02em}

/* ===== RESPONSIVE ===== */
@media (max-width:1188px){
  .hero__grid{grid-template-columns:1fr;gap:40px}
  .split{grid-template-columns:1fr;gap:28px}
  .cards,.cards--3{grid-template-columns:repeat(2,1fr)}
  .flow{grid-template-columns:repeat(2,1fr)}
  .step:not(:last-child)::after{display:none}
  /* mobile nav */
  .nav__burger{display:flex}
  .nav__menu{position:absolute;top:68px;left:0;right:0;flex-direction:column;align-items:stretch;
    gap:6px;padding:16px 24px 22px;background:#0c2329;border-bottom:1px solid var(--line);
    transform:translateY(-12px);opacity:0;pointer-events:none;transition:.25s}
  .nav__menu a:not(.btn){padding:10px 4px;border-bottom:1px solid var(--line)}
  .nav__menu .nav__lang{align-self:flex-start;margin:10px 0 4px}
  .nav__menu .nav__lang a{padding:6px 11px;border-bottom:none}
  .nav__menu .btn{justify-content:center;margin-top:6px}
  .nav__check:checked ~ .nav__menu{transform:none;opacity:1;pointer-events:auto}
  .nav__check:checked ~ .nav__burger span:nth-child(1){transform:translateY(7px) rotate(45deg)}
  .nav__check:checked ~ .nav__burger span:nth-child(2){opacity:0}
  .nav__check:checked ~ .nav__burger span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
}
@media (max-width:560px){
  .cards,.cards--3,.flow{grid-template-columns:1fr}
  .hero__title{font-size:clamp(30px,9vw,40px)}
  .vault__core{gap:2px}
  .node{width:64px}.node--brain{width:84px}
}

/* reduced motion: keep the perimeter data-flow (it carries the message),
   drop only the largest sweep and the entrance fades */
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{scroll-behavior:auto!important;transition:none!important}
  .hero__title,.hero__lead,.hero__cta,.eyebrow{animation:none!important;opacity:1;transform:none}
  .vault__scan{animation:none!important}
  .vault{animation:none!important}
}