/* =========================================================
   ITIRIA — landing page styles
   Palette and visual language follow the EN partner deck.
   ========================================================= */

:root{
  --bg:#0B1120;
  --surface:#131B2E;
  --surface-2:#1A2440;
  --line:#2A3552;
  --text:#F2F5FA;
  --muted:#9AA6BD;
  --dim:#5F6B85;
  --accent:#34E0A1;
  --accent-bg:#0F2E2A;
  --ink:#06231B;

  --wrap:1180px;
  --radius:14px;
  --radius-sm:10px;
  --font:"Inter","Segoe UI",Arial,Helvetica,sans-serif;
}

*,*::before,*::after{box-sizing:border-box;}

html{scroll-behavior:smooth;scroll-padding-top:88px;}

body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:var(--font);
  font-size:17px;
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
}

h1,h2,h3,h4{margin:0 0 .4em;line-height:1.2;font-weight:700;letter-spacing:-.01em;}
h2{font-size:clamp(1.7rem,3vw,2.3rem);}
h3{font-size:1.2rem;}
h4{font-size:1.02rem;}
p{margin:0 0 1em;}
ul,ol{margin:0;padding:0;list-style:none;}

a{color:var(--accent);text-decoration:none;}
a:hover{text-decoration:underline;}

:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:4px;}

.skip-link{
  position:absolute;left:-9999px;top:0;background:var(--accent);color:var(--ink);
  padding:.6rem 1rem;font-weight:600;z-index:100;
}
.skip-link:focus{left:1rem;top:1rem;}

.wrap{width:100%;max-width:var(--wrap);margin:0 auto;padding:0 24px;}

/* ---------------------------- header --------------------------- */
.site-header{
  position:sticky;top:0;z-index:50;
  background:rgba(11,17,32,.86);
  backdrop-filter:blur(10px);
  border-bottom:1px solid transparent;
  transition:border-color .2s ease,background .2s ease;
}
.site-header.is-stuck{border-bottom-color:var(--line);}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:68px;}

.wordmark{
  font-weight:700;letter-spacing:.16em;font-size:1.05rem;color:var(--text);text-decoration:none;
}
.wordmark:hover{text-decoration:none;color:var(--text);}

.nav{display:flex;align-items:center;gap:26px;}
.nav a{color:var(--muted);font-size:.92rem;}
.nav a:hover{color:var(--text);text-decoration:none;}
.nav .btn{color:var(--ink);}

.nav-toggle{
  display:none;background:none;border:1px solid var(--line);border-radius:8px;
  width:42px;height:38px;padding:9px 10px;cursor:pointer;
}
.nav-toggle span{display:block;height:2px;background:var(--text);border-radius:2px;margin:3px 0;}

/* ---------------------------- buttons -------------------------- */
.btn{
  display:inline-block;border-radius:999px;padding:.72rem 1.4rem;
  font-weight:600;font-size:.95rem;line-height:1.1;text-align:center;
  transition:transform .15s ease,background .15s ease,border-color .15s ease;
}
.btn:hover{text-decoration:none;transform:translateY(-1px);}
.btn-primary{background:var(--accent);color:var(--ink);}
.btn-primary:hover{background:#4af0b1;}
.btn-ghost{border:1px solid var(--line);color:var(--text);background:transparent;}
.btn-ghost:hover{border-color:var(--accent);color:var(--accent);}
.btn-sm{padding:.5rem 1rem;font-size:.88rem;}

/* ----------------------------- hero ---------------------------- */
.hero{padding:86px 0 72px;position:relative;overflow:hidden;}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center;}

.eyebrow{
  color:var(--accent);font-size:.78rem;font-weight:600;letter-spacing:.18em;
  text-transform:uppercase;margin-bottom:1rem;
}
.brand-display{
  font-size:clamp(3.2rem,7vw,5rem);letter-spacing:.1em;margin:0 0 .3em;font-weight:700;
}
.hero-lead{font-size:clamp(1.15rem,2vw,1.45rem);max-width:30ch;margin-bottom:.9rem;}
.hero-tagline{color:var(--muted);font-size:1.02rem;}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin:1.8rem 0 1rem;}
.hero-note{margin:0;font-size:.92rem;}
.link{border-bottom:1px solid rgba(52,224,161,.4);}

/* hero diagram */
.hero-model{position:relative;display:flex;flex-direction:column;align-items:center;gap:0;padding:24px 0;}
.rings{position:absolute;inset:0;display:grid;place-items:center;pointer-events:none;}
.rings span{position:absolute;border-radius:50%;border:1px solid var(--line);}
.rings span:nth-child(1){width:min(430px,92%);aspect-ratio:1;}
.rings span:nth-child(2){width:min(330px,72%);aspect-ratio:1;border-style:dashed;}

.node{
  position:relative;display:flex;align-items:center;gap:12px;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  padding:14px 20px;font-weight:600;font-size:.98rem;width:min(330px,100%);
}
.node .ico{width:22px;height:22px;flex:none;fill:var(--accent);color:var(--accent);}
.node-core{
  flex-direction:column;align-items:center;gap:4px;text-align:center;
  background:var(--accent-bg);border-color:var(--accent);padding:20px;width:min(360px,100%);
}
.core-mark{font-size:1.4rem;font-weight:700;letter-spacing:.14em;color:var(--text);}
.core-label{font-size:.85rem;color:var(--accent);font-weight:500;}

.connector{position:relative;height:42px;width:2px;display:grid;place-items:center;}
.connector .line{display:block;width:2px;height:100%;background:var(--accent);opacity:.65;}

/* --------------------------- sections -------------------------- */
.section{padding:84px 0;border-top:1px solid rgba(42,53,82,.5);}
.section-alt{background:linear-gradient(180deg,rgba(19,27,46,.55),rgba(11,17,32,0));}
.section-label{
  color:var(--accent);font-size:.78rem;font-weight:600;letter-spacing:.18em;
  text-transform:uppercase;margin-bottom:.8rem;
}
.section-lead{color:var(--muted);max-width:74ch;font-size:1.03rem;}
.section-lead.accent{color:var(--accent);}
.subhead{margin:44px 0 18px;font-size:1.1rem;}

/* grids and cards */
.grid{display:grid;gap:18px;}
.grid-2{grid-template-columns:repeat(2,1fr);}
.grid-3{grid-template-columns:repeat(3,1fr);}
.grid-4{grid-template-columns:repeat(4,1fr);}

.card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  padding:22px;
}
.card p{color:var(--muted);font-size:.95rem;margin:0;}
.card p + p{margin-top:.6rem;}
.card-accent{background:var(--accent-bg);border-color:var(--accent);}
.card-accent h3,.card-accent h4{color:var(--accent);}
.card-accent p{color:var(--text);}
.card-quiet{padding:16px 18px;font-size:.95rem;color:var(--muted);}
.card-lg{padding:28px;}

/* --------------------------- problem --------------------------- */
.flow-pair{display:grid;grid-template-columns:repeat(2,1fr);gap:18px;margin-top:30px;}
.panel{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:24px;}
.panel-accent{background:var(--accent-bg);border-color:var(--accent);}
.panel-title{
  color:var(--accent);font-size:.82rem;font-weight:600;letter-spacing:.16em;
  text-transform:uppercase;margin-bottom:1.1rem;
}
.steps{counter-reset:step;}
.steps li{
  counter-increment:step;position:relative;padding:0 0 16px 36px;font-size:.96rem;
}
.steps li::before{
  content:counter(step);position:absolute;left:0;top:0;
  width:22px;height:22px;border-radius:50%;display:grid;place-items:center;
  font-size:.72rem;font-weight:600;color:var(--text);
  background:var(--surface-2);border:1px solid var(--line);
}
.steps li::after{
  content:"";position:absolute;left:11px;top:22px;bottom:0;width:1px;background:var(--line);
}
.steps li:last-child{padding-bottom:0;}
.steps li:last-child::after{display:none;}
.panel-accent .steps li::before{background:var(--ink);border-color:var(--accent);}
.steps-out{color:var(--muted);font-style:italic;}
.steps-out::before{border-style:dashed !important;color:var(--muted) !important;background:var(--bg) !important;}

/* --------------------------- solution -------------------------- */
.solution-grid{display:grid;grid-template-columns:1.25fr .85fr;gap:40px;margin-top:34px;align-items:start;}
.diagram{display:flex;flex-direction:column;align-items:center;}
.node-wide{width:min(360px,100%);justify-content:center;}

.layer{
  width:100%;background:var(--accent-bg);border:1px solid var(--accent);
  border-radius:var(--radius);padding:20px 22px;
}
.layer-name{font-weight:700;letter-spacing:.14em;margin:0 0 14px;font-size:1.05rem;}
.chips{display:flex;flex-wrap:wrap;gap:8px;}
.chips li{
  border:1px solid var(--accent);border-radius:999px;background:var(--ink);
  color:var(--accent);font-size:.8rem;font-weight:600;padding:.34rem .85rem;
}

.connector-bus{width:100%;height:34px;}
.connector-bus .line{position:absolute;top:0;height:22px;}
.connector-bus .bus{
  position:absolute;top:22px;left:10%;right:10%;height:2px;
  background:var(--accent);opacity:.65;
}
.channels{display:grid;grid-template-columns:repeat(5,1fr);gap:10px;width:100%;}
.channels li{
  position:relative;background:var(--surface);border:1px solid var(--line);
  border-radius:var(--radius-sm);padding:16px 8px;text-align:center;
  font-size:.86rem;font-weight:600;
}
/* short drop from the horizontal bus into every channel */
.channels li::before{
  content:"";position:absolute;top:-12px;left:50%;width:2px;height:12px;
  background:var(--accent);opacity:.65;
}

.solution-copy .statement{font-size:1.1rem;}
.callout{
  background:var(--accent-bg);border-radius:var(--radius);padding:20px 22px;
  font-weight:600;margin-bottom:16px;
}
.callout-lg{padding:24px;}
.callout-kicker{color:var(--accent);font-size:.78rem;font-weight:600;letter-spacing:.16em;text-transform:uppercase;margin-bottom:.5rem;}
.footnote{color:var(--muted);font-size:.9rem;font-style:italic;margin-top:14px;}

/* ------------------------ user experience ---------------------- */
.ux-grid{display:grid;grid-template-columns:1.35fr .65fr;gap:44px;margin-top:34px;align-items:start;}
.ux-flow + .ux-flow{margin-top:34px;}
.flow-tag{
  display:inline-block;border:1px solid var(--accent);border-radius:999px;
  color:var(--accent);font-size:.76rem;font-weight:600;letter-spacing:.14em;
  text-transform:uppercase;padding:.3rem 1rem;margin-bottom:18px;background:var(--accent-bg);
}
.flow-tag-solid{background:var(--accent);color:var(--ink);}
.track{display:grid;grid-template-columns:repeat(6,1fr);gap:8px;position:relative;}
.track li{text-align:center;font-size:.86rem;padding-top:34px;position:relative;}
.track .dot{
  position:absolute;top:0;left:50%;transform:translateX(-50%);
  width:28px;height:28px;border-radius:50%;display:grid;place-items:center;
  background:var(--surface-2);border:1px solid var(--line);font-size:.78rem;font-weight:600;
}
.track li::before{content:"";position:absolute;top:14px;left:-50%;width:100%;height:1px;background:var(--line);}
.track li:first-child::before{display:none;}
.track .last{color:var(--accent);font-weight:600;}
.track .last .dot{background:var(--accent);border-color:var(--accent);color:var(--ink);}

/* conceptual mobile mockup */
.mock{margin:0;display:flex;flex-direction:column;align-items:center;gap:12px;}
.mock-tag{
  order:-1;border:1px dashed var(--muted);border-radius:999px;color:var(--muted);
  font-size:.72rem;letter-spacing:.14em;text-transform:uppercase;padding:.28rem .9rem;
}
.phone{
  width:100%;max-width:300px;background:var(--surface);border:1px solid var(--line);
  border-radius:28px;padding:22px 18px;
}
.mock-title{font-size:1.15rem;font-weight:700;margin:0 0 14px;}
.seg{display:grid;grid-template-columns:1fr 1fr;background:var(--bg);border:1px solid var(--line);border-radius:999px;padding:3px;margin-bottom:16px;}
.seg span{text-align:center;font-size:.82rem;padding:.3rem 0;color:var(--muted);border-radius:999px;}
.seg .on{background:var(--accent);color:var(--ink);font-weight:600;}
.mock-label{font-size:.72rem;color:var(--muted);margin:0 0 .3rem;}
.mock-label-strong{color:var(--text);font-weight:600;margin-top:1rem;}
.mock-field{
  background:var(--bg);border:1px solid var(--line);border-radius:8px;
  padding:.55rem .7rem;font-size:.85rem;color:var(--dim);margin-bottom:.8rem;
}
.mock-field-filled{color:var(--text);font-weight:600;}
.mock-option{
  display:flex;justify-content:space-between;align-items:center;gap:8px;
  background:var(--bg);border:1px solid var(--line);border-radius:8px;
  padding:.55rem .7rem;margin-bottom:.5rem;font-size:.85rem;font-weight:600;
}
.mock-option em{font-style:normal;font-weight:400;font-size:.76rem;color:var(--muted);}
.mock-option.on{background:var(--accent-bg);border-color:var(--accent);}
.mock-cta{
  background:var(--accent);color:var(--ink);text-align:center;font-weight:600;
  border-radius:999px;padding:.55rem;margin-top:1rem;font-size:.9rem;
}

/* ------------------------ operating model ---------------------- */
.roles{margin-top:32px;align-items:stretch;}
.roles .card{display:flex;flex-direction:column;}
.role-label{color:var(--muted);font-size:.85rem;margin-bottom:1rem;}
.ticks li{position:relative;padding:0 0 12px 20px;font-size:.94rem;}
.ticks li::before{
  content:"";position:absolute;left:0;top:.55em;width:7px;height:7px;border-radius:50%;
  background:var(--muted);
}
.card-accent .ticks li::before{background:var(--accent);}
.card-accent .ticks li{color:var(--text);}

.compliance-note{
  margin-top:26px;background:var(--surface);border:1px solid var(--line);
  border-left:3px solid var(--accent);border-radius:var(--radius);
  padding:20px 24px;color:var(--muted);font-size:.98rem;
}
.compliance-note strong{color:var(--text);display:block;margin-bottom:.25rem;}

/* ---------------------------- value ---------------------------- */
.value-lead{margin:30px 0 18px;}
.value-kicker{
  color:var(--accent);font-size:.76rem;font-weight:600;letter-spacing:.16em;
  text-transform:uppercase;margin-bottom:.5rem;
}
.value-lead h3{font-size:1.45rem;}

/* --------------------------- timeline -------------------------- */
.timeline{display:grid;grid-template-columns:repeat(5,1fr);gap:14px;margin-top:38px;align-items:stretch;}
.timeline li{
  position:relative;display:flex;flex-direction:column;background:var(--surface);
  border:1px solid var(--line);border-radius:var(--radius);padding:30px 18px 20px;
}
.timeline li::before{
  content:"";position:absolute;top:-12px;left:22px;width:22px;height:22px;border-radius:50%;
  background:var(--bg);border:2px solid var(--accent);
}
.timeline li.done::before{background:var(--accent);}
.timeline li.progress::before{border-style:dashed;}
.timeline li.next{background:var(--accent-bg);border-color:var(--accent);}
.timeline li.next::before{border-color:var(--text);}
.timeline .stage{
  color:var(--accent);font-size:.72rem;font-weight:600;letter-spacing:.14em;
  text-transform:uppercase;margin-bottom:.5rem;
}
.timeline li.progress .stage{color:var(--muted);}
.timeline h3{font-size:1.02rem;}
.timeline p:last-child{color:var(--muted);font-size:.88rem;margin:0;}
.status-note{
  margin-top:26px;color:var(--text);font-size:.98rem;border-left:3px solid var(--accent);
  padding-left:18px;max-width:90ch;
}

/* ---------------------------- pilot ---------------------------- */
.pilot-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:44px;align-items:start;}
.statement{font-size:1.08rem;}
.statement.accent{color:var(--accent);font-weight:600;}
.cta-block{
  margin-top:26px;background:var(--surface);border:1px solid var(--line);
  border-radius:var(--radius);padding:26px;
}
.cta-block h3{margin-bottom:.4rem;}
.cta-block p{color:var(--muted);font-size:.95rem;}
.scope{padding:28px;}
.scope h3{margin-bottom:1.2rem;}
.scope-list div{padding:14px 0;border-top:1px solid var(--line);}
.scope-list div:first-child{border-top:0;padding-top:0;}
.scope-list dt{
  color:var(--accent);font-size:.74rem;font-weight:600;letter-spacing:.14em;
  text-transform:uppercase;margin-bottom:.3rem;
}
.scope-list dd{margin:0;font-size:.96rem;}

/* ---------------------------- footer --------------------------- */
.site-footer{border-top:1px solid var(--line);padding:34px 0;margin-top:20px;}
.footer-inner{display:flex;flex-wrap:wrap;align-items:center;gap:14px 28px;}
.footer-inner .wordmark{margin:0;}
.footer-line{margin:0;color:var(--muted);font-size:.9rem;}
.footer-links{margin:0;display:flex;gap:18px;font-size:.9rem;margin-left:auto;}
.footer-copy{margin:0;color:var(--dim);font-size:.85rem;width:100%;}

/* -------------------------- reveal motion ---------------------- */
.reveal{opacity:0;transform:translateY(14px);transition:opacity .5s ease,transform .5s ease;}
.reveal.is-visible{opacity:1;transform:none;}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  .reveal{opacity:1;transform:none;transition:none;}
  .btn:hover{transform:none;}
}

/* ========================== responsive ========================= */
@media (max-width:1024px){
  .hero-grid,.solution-grid,.ux-grid,.pilot-grid{grid-template-columns:1fr;gap:38px;}
  .grid-4{grid-template-columns:repeat(2,1fr);}
  .grid-3{grid-template-columns:1fr;}
  .timeline{grid-template-columns:1fr;gap:12px;}
  .timeline li{padding:20px 18px 18px 34px;}
  .timeline li::before{top:22px;left:-11px;}
  .hero{padding:56px 0;}
  .section{padding:64px 0;}
}

@media (max-width:768px){
  body{font-size:16px;}
  .nav{
    display:none;position:absolute;top:68px;left:0;right:0;
    flex-direction:column;align-items:flex-start;gap:0;
    background:var(--surface);border-top:1px solid var(--line);border-bottom:1px solid var(--line);
    padding:10px 24px 18px;
  }
  .nav.is-open{display:flex;}
  .nav a{padding:.7rem 0;font-size:1rem;width:100%;}
  .nav .btn{margin-top:10px;}
  .nav-toggle{display:block;}
  .flow-pair,.grid-2,.grid-4{grid-template-columns:1fr;}
  .channels{grid-template-columns:repeat(2,1fr);}
  .channels li::before{display:none;}
  .connector-bus .bus{left:25%;right:25%;}
  .track{grid-template-columns:1fr;gap:0;}
  .track li{text-align:left;padding:0 0 18px 42px;}
  .track .dot{left:0;transform:none;top:0;}
  .track li::before{top:28px;left:13px;width:1px;height:calc(100% - 28px);}
  .footer-links{margin-left:0;flex-wrap:wrap;}
}

@media (max-width:420px){
  .wrap{padding:0 18px;}
  .hero-actions .btn{width:100%;}
  .card,.panel{padding:18px;}
}