/* ============================================================
   AUTAVION — Design System
   Blueprint / engineering-schematic aesthetic. Dark, precise, premium.
   ============================================================ */

:root{
  --bg:#070A0F;
  --bg-2:#0B1017;
  --panel:#0E141D;
  --panel-2:#111925;
  --line:rgba(126,156,186,.15);
  --line-strong:rgba(126,156,186,.30);
  --grid:rgba(110,145,185,.055);
  --txt:#E9EDF3;
  --muted:#93A0B1;
  --faint:#5E6B7C;
  --gold:#3B82F6;
  --gold-2:#93C5FD;
  --blue:#6FA0CC;
  --ok:#7FBF9E;
  --font-en:"Space Grotesk",system-ui,sans-serif;
  --font-ar:"IBM Plex Sans Arabic",system-ui,sans-serif;
  --mono:"JetBrains Mono",ui-monospace,monospace;
  --max:1180px;
  --r:2px;
}

*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  background:var(--bg);
  color:var(--txt);
  font-family:var(--font-en);
  font-size:16.5px;
  line-height:1.65;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
html[dir="rtl"] body{font-family:var(--font-ar);line-height:1.85;letter-spacing:0}

/* Language visibility */
html[dir="ltr"] .ar{display:none!important}
html[dir="rtl"] .en{display:none!important}
html[dir="rtl"] .keep-ltr{direction:ltr;unicode-bidi:isolate}

::selection{background:rgba(59,130,246,.28)}

img,svg{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
ul{list-style:none}

/* Blueprint grid backdrop */
.grid-bg{
  position:fixed;inset:0;z-index:-2;pointer-events:none;
  background-image:
    linear-gradient(var(--grid) 1px,transparent 1px),
    linear-gradient(90deg,var(--grid) 1px,transparent 1px);
  background-size:56px 56px;
}
.grid-bg::after{
  content:"";position:absolute;inset:0;
  background:radial-gradient(ellipse 90% 60% at 50% 0%,rgba(111,160,204,.06),transparent 60%),
             radial-gradient(ellipse 70% 50% at 50% 100%,rgba(7,10,15,.9),transparent);
}

.wrap{max-width:var(--max);margin-inline:auto;padding-inline:28px}

/* ---------- Type ---------- */
h1,h2,h3,h4{font-weight:600;line-height:1.15;letter-spacing:-.015em}
html[dir="rtl"] h1,html[dir="rtl"] h2,html[dir="rtl"] h3,html[dir="rtl"] h4{letter-spacing:0;line-height:1.4;font-weight:600}
.display{font-size:clamp(2.6rem,5.6vw,4.4rem)}
.h2{font-size:clamp(1.9rem,3.4vw,2.8rem)}
.h3{font-size:clamp(1.25rem,2vw,1.55rem)}
.lead{font-size:clamp(1.05rem,1.6vw,1.25rem);color:var(--muted);line-height:1.7}
html[dir="rtl"] .lead{line-height:1.9}
.muted{color:var(--muted)}
.gold{color:var(--gold)}

/* Mono technical label */
.tag{
  font-family:var(--mono);font-size:.72rem;letter-spacing:.22em;
  text-transform:uppercase;color:var(--gold);
  display:inline-flex;align-items:center;gap:.7em;
}
.tag::before{content:"";width:26px;height:1px;background:var(--gold);display:inline-block}
html[dir="rtl"] .tag{letter-spacing:.1em}

.idx{font-family:var(--mono);font-size:.72rem;color:var(--faint);letter-spacing:.18em}

/* ---------- Header ---------- */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:100;
  border-bottom:1px solid transparent;
  transition:background .35s,border-color .35s;
}
.site-header.scrolled{background:rgba(7,10,15,.86);backdrop-filter:blur(14px);border-color:var(--line)}
.nav{
  max-width:var(--max);margin-inline:auto;padding:0 28px;
  display:flex;align-items:center;justify-content:space-between;height:76px;
}
.logo{display:flex;align-items:center;gap:.65rem;font-weight:600;letter-spacing:.30em;font-size:1.02rem}
.logo .mark{width:30px;height:30px;flex:none}
.logo span{padding-top:2px}
.nav-links{display:flex;align-items:center;gap:2.2rem}
.nav-links a{
  font-size:.86rem;letter-spacing:.09em;color:var(--muted);
  text-transform:uppercase;font-weight:500;transition:color .25s;position:relative;
}
html[dir="rtl"] .nav-links a{letter-spacing:.02em;font-size:.95rem;text-transform:none}
.nav-links a:hover,.nav-links a.active{color:var(--txt)}
.nav-links a.active::after{
  content:"";position:absolute;bottom:-8px;inset-inline-start:0;width:18px;height:1px;background:var(--gold);
}
.nav-cta-group{display:flex;align-items:center;gap:1.1rem}

.lang-btn{
  font-family:var(--mono);font-size:.74rem;letter-spacing:.12em;
  background:none;border:1px solid var(--line-strong);color:var(--muted);
  padding:.5em 1em;cursor:pointer;border-radius:var(--r);transition:.25s;
}
.lang-btn:hover{color:var(--gold);border-color:var(--gold)}

.burger{display:none;background:none;border:none;cursor:pointer;padding:6px}
.burger span{display:block;width:22px;height:1.5px;background:var(--txt);margin:5px 0;transition:.3s}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;gap:.7em;
  font-family:var(--font-en);font-weight:500;font-size:.9rem;letter-spacing:.08em;text-transform:uppercase;
  padding:1em 2em;border-radius:var(--r);border:1px solid var(--gold);
  transition:.3s;cursor:pointer;position:relative;overflow:hidden;
}
html[dir="rtl"] .btn{font-family:var(--font-ar);letter-spacing:0;text-transform:none;font-size:1rem}
.btn-solid{background:var(--gold);color:#041018}
.btn-solid:hover{background:var(--gold-2);border-color:var(--gold-2);transform:translateY(-2px);box-shadow:0 12px 30px -12px rgba(59,130,246,.45)}
.btn-ghost{color:var(--gold);background:transparent}
.btn-ghost:hover{background:rgba(59,130,246,.08);transform:translateY(-2px)}
.btn .arr{transition:transform .3s}
.btn:hover .arr{transform:translateX(4px)}
html[dir="rtl"] .btn .arr{transform:scaleX(-1)}
html[dir="rtl"] .btn:hover .arr{transform:scaleX(-1) translateX(4px)}

/* ---------- Sections ---------- */
section{position:relative}
.section{padding:110px 0}
.section-head{max-width:720px;margin-bottom:64px}
.section-head .tag{margin-bottom:1.2rem}
.section-head p{margin-top:1.1rem}

.hr-tech{
  height:1px;background:var(--line);position:relative;max-width:var(--max);margin:0 auto;
}
.hr-tech::before,.hr-tech::after{
  content:"+";position:absolute;top:-9px;color:var(--faint);font-family:var(--mono);font-size:.8rem;
}
.hr-tech::before{inset-inline-start:0}
.hr-tech::after{inset-inline-end:0}

/* ---------- Hero ---------- */
.hero{min-height:100svh;display:flex;align-items:center;padding:150px 0 90px;position:relative}
.hero-inner{display:grid;grid-template-columns:1.15fr .85fr;gap:60px;align-items:center}
.hero .display{margin:1.4rem 0 1.6rem}
.hero .display em{font-style:normal;color:var(--gold)}
.hero-ctas{display:flex;gap:1.1rem;margin-top:2.6rem;flex-wrap:wrap}
.hero-meta{
  margin-top:4rem;display:flex;gap:2.6rem;flex-wrap:wrap;
  font-family:var(--mono);font-size:.72rem;letter-spacing:.14em;color:var(--faint);text-transform:uppercase;
}
html[dir="rtl"] .hero-meta{letter-spacing:.03em;font-family:var(--font-ar);font-size:.85rem;text-transform:none}
.hero-meta span{display:flex;align-items:center;gap:.6em}
.hero-meta i{width:5px;height:5px;background:var(--gold);border-radius:50%;flex:none}

/* Signal path schematic */
.schematic{position:relative}
.schematic svg{width:100%;height:auto}
.sig-path{stroke-dasharray:6 8;animation:dash 22s linear infinite}
@keyframes dash{to{stroke-dashoffset:-560}}
.node-pulse{animation:pulse 2.6s ease-in-out infinite}
.node-pulse.d1{animation-delay:.6s}.node-pulse.d2{animation-delay:1.2s}.node-pulse.d3{animation-delay:1.8s}
@keyframes pulse{0%,100%{opacity:.35}50%{opacity:1}}
.slow-spin{transform-origin:center;animation:spin 40s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}

/* ---------- Cards ---------- */
.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:22px}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}

.card{
  background:linear-gradient(160deg,var(--panel),var(--bg-2));
  border:1px solid var(--line);border-radius:var(--r);
  padding:2.2rem;position:relative;transition:border-color .35s,transform .35s,box-shadow .35s;
}
.card:hover{border-color:var(--line-strong);transform:translateY(-4px);box-shadow:0 24px 48px -24px rgba(0,0,0,.6)}
.card .idx{position:absolute;top:1.4rem;inset-inline-end:1.6rem}
.card h3{margin:1.1rem 0 .8rem}
.card p{color:var(--muted);font-size:.95rem}
html[dir="rtl"] .card p{font-size:1rem}
.card .corner{position:absolute;top:-1px;inset-inline-start:-1px;width:14px;height:14px;border-top:1px solid var(--gold);border-inline-start:1px solid var(--gold);opacity:0;transition:opacity .35s}
.card:hover .corner{opacity:1}

/* System cards */
.sys-card{display:flex;flex-direction:column;min-height:280px}
.sys-card .sys-num{font-family:var(--mono);color:var(--faint);font-size:.72rem;letter-spacing:.2em}
.sys-card h3{font-size:1.28rem;margin:.9rem 0 .7rem}
.sys-card p{flex:1}
.sys-link{
  margin-top:1.6rem;font-family:var(--mono);font-size:.74rem;letter-spacing:.16em;text-transform:uppercase;
  color:var(--gold);display:inline-flex;align-items:center;gap:.6em;transition:gap .3s;
}
html[dir="rtl"] .sys-link{font-family:var(--font-ar);letter-spacing:0;text-transform:none;font-size:.9rem}
.sys-card:hover .sys-link{gap:1em}
html[dir="rtl"] .sys-link svg{transform:scaleX(-1)}

/* Pillars */
.pillar{border-inline-start:1px solid var(--line);padding-inline-start:1.6rem;padding-block:.4rem;transition:border-color .35s}
.pillar:hover{border-color:var(--gold)}
.pillar h3{font-size:1.12rem;margin:.9rem 0 .6rem}
.pillar p{color:var(--muted);font-size:.93rem}
html[dir="rtl"] .pillar p{font-size:1rem}

/* Steps */
.step{position:relative;padding-top:1.6rem}
.step::before{content:"";position:absolute;top:0;inset-inline-start:0;width:100%;height:1px;background:var(--line)}
.step::after{content:"";position:absolute;top:-3px;inset-inline-start:0;width:7px;height:7px;background:var(--gold);border-radius:50%}
.step .idx{color:var(--gold)}
.step h3{font-size:1.08rem;margin:.7rem 0 .5rem}
.step p{color:var(--muted);font-size:.92rem}
html[dir="rtl"] .step p{font-size:1rem}

/* Niche rows */
.niche{
  display:grid;grid-template-columns:110px 1fr 1.2fr;gap:2rem;align-items:baseline;
  padding:2.2rem 0;border-top:1px solid var(--line);transition:background .3s;
}
.niche:last-child{border-bottom:1px solid var(--line)}
.niche:hover{background:rgba(126,156,186,.03)}
.niche h3{font-size:1.3rem}
.niche p{color:var(--muted);font-size:.95rem}

/* ---------- CTA band ---------- */
.cta-band{
  border-block:1px solid var(--line);
  background:
    radial-gradient(ellipse 60% 120% at 50% 100%,rgba(59,130,246,.08),transparent),
    linear-gradient(var(--bg-2),var(--bg));
  text-align:center;padding:110px 0;
}
.cta-band .h2{max-width:760px;margin:1.4rem auto 1rem}
.cta-band .lead{max-width:600px;margin:0 auto 2.6rem}

/* ---------- Page hero (inner pages) ---------- */
.page-hero{padding:190px 0 80px}
.page-hero .display{margin:1.4rem 0 1.4rem;max-width:900px}
.page-hero .lead{max-width:700px}
.crumb{font-family:var(--mono);font-size:.72rem;letter-spacing:.18em;color:var(--faint);text-transform:uppercase;display:flex;gap:.8em;margin-bottom:2rem}
.crumb a:hover{color:var(--gold)}
html[dir="rtl"] .crumb{letter-spacing:.02em;font-family:var(--font-ar);font-size:.85rem;text-transform:none}

/* ---------- System detail ---------- */
.spec-list{display:grid;gap:0}
.spec-row{
  display:grid;grid-template-columns:70px 1fr;gap:1.6rem;align-items:baseline;
  padding:1.5rem 0;border-top:1px solid var(--line);
}
.spec-row:last-child{border-bottom:1px solid var(--line)}
.spec-row .idx{color:var(--gold)}
.spec-row h4{font-size:1.05rem;margin-bottom:.35rem}
.spec-row p{color:var(--muted);font-size:.93rem}
html[dir="rtl"] .spec-row p{font-size:1rem}

.outcome-list{display:grid;grid-template-columns:1fr 1fr;gap:1rem 2.4rem}
.outcome-list li{
  position:relative;padding-inline-start:1.8rem;color:var(--muted);font-size:.98rem;
}
.outcome-list li::before{
  content:"";position:absolute;inset-inline-start:0;top:.55em;width:9px;height:9px;
  border:1px solid var(--gold);transform:rotate(45deg);
}

.tier{padding:2.2rem;border:1px solid var(--line);border-radius:var(--r);background:var(--panel);position:relative;transition:.35s}
.tier:hover{border-color:var(--line-strong);transform:translateY(-4px)}
.tier.feat{border-color:rgba(59,130,246,.5)}
.tier.feat::before{
  content:attr(data-badge);position:absolute;top:-11px;inset-inline-start:2rem;
  font-family:var(--mono);font-size:.62rem;letter-spacing:.2em;text-transform:uppercase;
  background:var(--bg);color:var(--gold);padding:.3em .9em;border:1px solid rgba(59,130,246,.5);
}
.tier h3{font-size:1.15rem;margin-bottom:.7rem}
.tier p{color:var(--muted);font-size:.92rem}
html[dir="rtl"] .tier p{font-size:1rem}

.note-line{
  margin-top:2.4rem;font-family:var(--mono);font-size:.78rem;color:var(--faint);letter-spacing:.06em;
  display:flex;align-items:center;gap:.8em;
}
html[dir="rtl"] .note-line{font-family:var(--font-ar);font-size:.92rem;letter-spacing:0}
.note-line::before{content:"//";color:var(--gold)}

/* ---------- Forms ---------- */
.field{margin-bottom:1.4rem}
.field label{
  display:block;font-family:var(--mono);font-size:.7rem;letter-spacing:.16em;text-transform:uppercase;
  color:var(--muted);margin-bottom:.55rem;
}
html[dir="rtl"] .field label{font-family:var(--font-ar);letter-spacing:0;font-size:.85rem;text-transform:none}
.field input,.field select,.field textarea{
  width:100%;background:var(--bg-2);border:1px solid var(--line-strong);border-radius:var(--r);
  color:var(--txt);font-family:inherit;font-size:.98rem;padding:.9em 1.1em;transition:border-color .25s;
}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:var(--gold)}
.field textarea{min-height:140px;resize:vertical}
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:70px;align-items:start}
.contact-item{padding:1.6rem 0;border-top:1px solid var(--line)}
.contact-item:last-child{border-bottom:1px solid var(--line)}
.contact-item .idx{color:var(--gold)}
.contact-item h4{margin:.5rem 0 .3rem;font-size:1.05rem}
.contact-item p,.contact-item a{color:var(--muted);font-size:.95rem}
.contact-item a:hover{color:var(--gold)}

/* ---------- Footer ---------- */
footer{border-top:1px solid var(--line);padding:70px 0 40px;background:var(--bg-2)}
.foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px;margin-bottom:60px}
.foot-grid h5{
  font-family:var(--mono);font-size:.7rem;letter-spacing:.2em;text-transform:uppercase;
  color:var(--faint);margin-bottom:1.2rem;
}
html[dir="rtl"] .foot-grid h5{font-family:var(--font-ar);letter-spacing:.02em;font-size:.85rem;text-transform:none}
.foot-grid a{display:block;color:var(--muted);font-size:.92rem;margin-bottom:.7rem;transition:color .25s}
.foot-grid a:hover{color:var(--gold)}
.foot-grid p{color:var(--muted);font-size:.92rem;max-width:300px}
.foot-bottom{
  display:flex;justify-content:space-between;align-items:center;gap:1rem;flex-wrap:wrap;
  padding-top:30px;border-top:1px solid var(--line);
  font-family:var(--mono);font-size:.72rem;color:var(--faint);letter-spacing:.1em;
}
html[dir="rtl"] .foot-bottom{font-family:var(--font-ar);letter-spacing:0;font-size:.85rem}

/* ---------- Reveal ---------- */
.reveal{opacity:0;transform:translateY(26px);transition:opacity .8s cubic-bezier(.2,.6,.2,1),transform .8s cubic-bezier(.2,.6,.2,1)}
.reveal.in{opacity:1;transform:none}
.reveal.d1{transition-delay:.1s}.reveal.d2{transition-delay:.2s}.reveal.d3{transition-delay:.3s}
@media (prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none}
  .sig-path,.node-pulse,.slow-spin{animation:none}
}

/* ---------- Responsive ---------- */
@media(max-width:1020px){
  .hero-inner{grid-template-columns:1fr;gap:50px}
  .schematic{max-width:560px}
  .grid-4{grid-template-columns:1fr 1fr}
  .grid-3{grid-template-columns:1fr 1fr}
  .foot-grid{grid-template-columns:1fr 1fr}
  .contact-grid{grid-template-columns:1fr;gap:50px}
  .niche{grid-template-columns:70px 1fr;gap:1rem}
  .niche p{grid-column:2}
}
@media(max-width:720px){
  .section{padding:80px 0}
  .grid-2,.grid-3,.grid-4{grid-template-columns:1fr}
  .outcome-list{grid-template-columns:1fr}
  .nav-links{
    position:fixed;inset:76px 0 auto 0;background:rgba(7,10,15,.97);backdrop-filter:blur(16px);
    flex-direction:column;gap:0;padding:1rem 28px 2rem;border-bottom:1px solid var(--line);
    display:none;
  }
  .nav-links.open{display:flex}
  .nav-links a{padding:1rem 0;width:100%;border-bottom:1px solid var(--line)}
  .burger{display:block}
  .nav-cta-group .btn{display:none}
  .hero{padding-top:120px}
  .page-hero{padding-top:150px}
  .spec-row{grid-template-columns:1fr;gap:.4rem}
}

/* ---------- Floating WhatsApp ---------- */
.wa-float{
  position:fixed;bottom:26px;inset-inline-end:26px;z-index:90;
  width:56px;height:56px;border-radius:50%;background:#25D366;
  display:flex;align-items:center;justify-content:center;
  box-shadow:0 12px 32px -8px rgba(37,211,102,.55);transition:transform .3s,box-shadow .3s;
}
.wa-float:hover{transform:translateY(-4px) scale(1.05);box-shadow:0 18px 40px -8px rgba(37,211,102,.65)}

/* ---------- Insights / articles ---------- */
.post-card{display:flex;flex-direction:column;min-height:250px}
.post-card .post-date{font-family:var(--mono);font-size:.7rem;color:var(--faint);letter-spacing:.16em}
html[dir="rtl"] .post-card .post-date{font-family:var(--font-ar);letter-spacing:.02em;font-size:.82rem}
.prose{max-width:760px}
.prose p{color:var(--muted);margin-bottom:1.3rem;font-size:1.02rem;line-height:1.75}
html[dir="rtl"] .prose p{line-height:1.95}
.prose h3{font-size:1.3rem;margin:2.4rem 0 1rem;color:var(--txt)}
.prose strong{color:var(--txt);font-weight:600}
.article-meta{display:flex;gap:1.8rem;font-family:var(--mono);font-size:.72rem;letter-spacing:.14em;color:var(--faint);text-transform:uppercase;margin-top:1.4rem}
html[dir="rtl"] .article-meta{font-family:var(--font-ar);letter-spacing:.02em;text-transform:none;font-size:.85rem}