:root{
  --bg-deep:#0A1424;
  --bg-surface:#101F36;
  --bg-surface-2:#152742;
  --line:#233752;
  --teal:#2FD9C4;
  --teal-dim:#1B8F80;
  --gold:#F2B155;
  --text-hi:#EAF2FA;
  --text-mid:#AFC1D6;
  --text-low:#728196;
  --danger:#E8607A;
  --radius:14px;
}
*{box-sizing:border-box; margin:0; padding:0;}
html{scroll-behavior:smooth;}
body{
  background:var(--bg-deep);
  color:var(--text-hi);
  font-family:'Vazirmatn',sans-serif;
  line-height:1.7;
  overflow-x:hidden;
}
.mono{font-family:'JetBrains Mono',monospace; letter-spacing:0.5px;}
a{color:inherit; text-decoration:none;}
ul{list-style:none;}
img,svg{display:block; max-width:100%;}
.container{max-width:1140px; margin:0 auto; padding:0 24px;}

/* background texture */
body::before{
  content:"";
  position:fixed; inset:0;
  background:
    radial-gradient(ellipse 900px 500px at 85% -5%, rgba(47,217,196,0.10), transparent 60%),
    radial-gradient(ellipse 700px 500px at -10% 20%, rgba(242,177,85,0.06), transparent 60%);
  pointer-events:none;
  z-index:0;
}

/* ===== NAV ===== */
header{
  position:sticky; top:0; z-index:100;
  background:rgba(10,20,36,0.85);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
}
.nav{
  display:flex; align-items:center; justify-content:space-between;
  height:72px;
}
.brand{display:flex; align-items:center; gap:10px; font-weight:800; font-size:1.25rem;}
.brand-mark{width:34px; height:34px;}
.brand small{display:block; font-size:0.62rem; color:var(--teal); font-weight:500; letter-spacing:1px;}

.nav-links{display:flex; align-items:center; gap:6px;}
.nav-links a{
  padding:10px 16px; border-radius:8px; font-size:0.95rem; font-weight:500;
  color:var(--text-mid); transition:all .2s ease;
}
.nav-links a:hover{color:var(--text-hi); background:var(--bg-surface-2);}
.nav-links a.active{color:var(--text-hi); background:var(--bg-surface-2);}
.nav-cta{
  background:var(--teal); color:#04211D !important; font-weight:700 !important;
  padding:10px 20px !important;
}
.nav-cta:hover{background:#3EEBD4; filter:none !important;}

.burger{
  display:none; width:42px; height:42px; border-radius:8px;
  border:1px solid var(--line); background:var(--bg-surface);
  align-items:center; justify-content:center; cursor:pointer;
}
.burger span, .burger span::before, .burger span::after{
  content:""; display:block; width:18px; height:2px; background:var(--text-hi);
  position:relative; transition:all .2s ease;
}
.burger span::before{position:absolute; top:-6px;}
.burger span::after{position:absolute; top:6px;}
.burger.open span{background:transparent;}
.burger.open span::before{transform:rotate(45deg); top:0;}
.burger.open span::after{transform:rotate(-45deg); top:0;}

/* ===== HERO ===== */
.hero{
  position:relative; z-index:1;
  padding:88px 0 70px;
  display:grid; grid-template-columns:1.1fr 0.9fr; gap:50px; align-items:center;
}
.hero-centered{
  display:flex; flex-direction:column; align-items:center;
  text-align:center; max-width:720px; margin:0 auto; gap:0;
}
.hero-centered .lead{margin-left:auto; margin-right:auto;}

/* smaller page-header used on sub pages like the download page */
.page-header{
  position:relative; z-index:1; padding:64px 0 48px; text-align:center;
}
.page-header .tag{color:var(--teal); font-weight:600; font-size:0.8rem; margin-bottom:10px; display:block;}
.page-header h1{font-size:2.2rem; font-weight:800; margin-bottom:14px;}
.page-header p{color:var(--text-mid); max-width:560px; margin:0 auto;}

.eyebrow{
  display:inline-flex; align-items:center; gap:8px;
  font-size:0.78rem; color:var(--teal); font-weight:600;
  background:rgba(47,217,196,0.08); border:1px solid rgba(47,217,196,0.25);
  padding:6px 14px; border-radius:100px; margin-bottom:22px;
}
.eyebrow .dot{width:6px; height:6px; border-radius:50%; background:var(--teal); animation:pulse 1.8s infinite;}
@keyframes pulse{0%,100%{opacity:1;} 50%{opacity:0.3;}}

.hero h1{
  font-size:2.9rem; font-weight:800; line-height:1.25; margin-bottom:20px;
  letter-spacing:-0.5px;
}
.hero h1 span{color:var(--teal);}
.hero p.lead{font-size:1.08rem; color:var(--text-mid); max-width:520px; margin-bottom:0;}

.btn{
  display:inline-flex; align-items:center; gap:8px;
  padding:14px 26px; border-radius:10px; font-weight:700; font-size:0.98rem;
  transition:all .2s ease; cursor:pointer; border:none;
}
.btn-primary{background:var(--teal); color:#04211D;}
.btn-primary:hover{background:#3EEBD4; transform:translateY(-2px);}
.btn-ghost{background:transparent; color:var(--text-hi); border:1px solid var(--line);}
.btn-ghost:hover{border-color:var(--teal); color:var(--teal);}

/* shield scan signature */
.shield-wrap{
  position:relative; display:flex; align-items:center; justify-content:center;
  height:420px;
}
.shield-wrap--compact{height:210px; margin-bottom:8px;}
.shield-glow{
  position:absolute; width:320px; height:320px; border-radius:50%;
  background:radial-gradient(circle, rgba(47,217,196,0.18), transparent 70%);
  filter:blur(10px);
}
.scan-line{
  position:absolute; width:230px; height:2px;
  background:linear-gradient(90deg, transparent, var(--teal), transparent);
  animation:scan 2.6s ease-in-out infinite;
  opacity:0.9;
}
@keyframes scan{
  0%{transform:translateY(-130px); opacity:0;}
  15%{opacity:1;}
  85%{opacity:1;}
  100%{transform:translateY(130px); opacity:0;}
}
.readout{
  position:absolute; bottom:6px; font-size:0.72rem; color:var(--teal);
}

/* ===== SECTION SHELL ===== */
section{position:relative; z-index:1; padding:80px 0; border-top:1px solid var(--line);}
.section-head{max-width:640px; margin-bottom:48px;}
.section-head .tag{color:var(--teal); font-weight:600; font-size:0.8rem; margin-bottom:10px; display:block;}
.section-head h2{font-size:2rem; font-weight:800; margin-bottom:12px;}
.section-head p{color:var(--text-mid);}

/* download */
.download-grid{display:grid; grid-template-columns:repeat(2,1fr); gap:22px;}
.dl-card{
  background:var(--bg-surface); border:1px solid var(--line); border-radius:var(--radius);
  padding:30px; transition:all .2s ease;
}
.dl-card:hover{border-color:var(--teal-dim); transform:translateY(-3px);}
.dl-card .icon{
  width:48px; height:48px; border-radius:10px; background:var(--bg-surface-2);
  display:flex; align-items:center; justify-content:center; margin-bottom:18px;
  color:var(--teal);
}
.dl-card h3{font-size:1.2rem; margin-bottom:8px;}
.dl-card p{color:var(--text-mid); font-size:0.92rem; margin-bottom:20px;}
.dl-card .meta{display:flex; justify-content:space-between; align-items:center;}
.dl-card .ver{color:var(--text-low); font-size:0.78rem;}
.dl-btn{
  background:var(--bg-surface-2); color:var(--text-hi); font-weight:600; font-size:0.88rem;
  padding:9px 16px; border-radius:8px; border:1px solid var(--line);
}
.dl-card:hover .dl-btn{background:var(--teal); color:#04211D; border-color:var(--teal);}

/* download page: spec list inside a card */
.dl-specs{margin-bottom:22px; display:flex; flex-direction:column; gap:8px;}
.dl-specs li{display:flex; gap:8px; color:var(--text-mid); font-size:0.88rem;}
.dl-specs li::before{content:"✓"; color:var(--teal); font-weight:700; flex-shrink:0;}
.dl-specs li .mono{color:var(--text-low); font-size:0.82rem;}

/* previous versions, grouped like the latest-version cards */
.version-group{margin-bottom:40px;}
.version-group:last-child{margin-bottom:0;}
.version-group-title{
  color:var(--teal); font-size:0.85rem; font-weight:600; margin-bottom:16px;
}
.dl-btn-row{display:flex; gap:10px;}
.dl-btn-row .dl-btn{flex:1; text-align:center;}
.dl-btn-row .btn{flex:1; justify-content:center;}

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

.enamad-slot{
  display:inline-flex; align-items:center; justify-content:center;
  width:120px; height:140px; border:1px dashed var(--line); border-radius:var(--radius);
  background:var(--bg-surface); color:var(--text-low); font-size:0.7rem; text-align:center;
}

/* partners */
.partners{
  background:var(--bg-surface); border:1px solid var(--line); border-radius:20px;
  padding:48px; max-width:640px; margin:0 auto; text-align:center;
}
.partners h2{font-size:1.7rem; font-weight:800; margin-bottom:14px;}
.partners p{color:var(--text-mid); margin-bottom:24px;}
.partner-list{display:flex; flex-direction:column; gap:12px; margin-bottom:26px; text-align:right; max-width:420px; margin-inline:auto;}
.partner-list li{display:flex; align-items:center; gap:10px; color:var(--text-mid); font-size:0.92rem;}
.partner-list li::before{content:"✓"; color:var(--teal); font-weight:700;}

footer{
  border-top:1px solid var(--line); padding:36px 0; position:relative; z-index:1;
}
.foot-row{display:flex; justify-content:space-between; align-items:center; flex-wrap:wrap; gap:16px;}
.foot-row p{color:var(--text-low); font-size:0.85rem;}

/* focus visibility */
a:focus-visible, button:focus-visible{outline:2px solid var(--teal); outline-offset:2px;}

@media (prefers-reduced-motion: reduce){
  .scan-line, .eyebrow .dot{animation:none;}
}

/* ===== RESPONSIVE ===== */
@media (max-width:900px){
  .hero{grid-template-columns:1fr; padding-top:40px;}
  .download-grid{grid-template-columns:1fr;}
  .contact-grid{grid-template-columns:1fr;}
  .partners{padding:30px;}
}
@media (max-width:760px){
  .nav-links{
    position:fixed; top:72px; right:0; left:0; bottom:0;
    background:var(--bg-deep); border-top:1px solid var(--line);
    flex-direction:column; align-items:stretch; gap:0; padding:14px;
    transform:translateX(100%); transition:transform .25s ease;
  }
  .nav-links.open{transform:translateX(0);}
  .nav-links a{padding:16px; border-radius:10px; font-size:1.05rem;}
  .nav-cta{margin-top:8px; text-align:center;}
  .burger{display:flex;}
  .hero h1{font-size:2.1rem;}
  .page-header h1{font-size:1.8rem;}
  section{padding:56px 0;}
  .dl-btn-row{flex-direction:column;}
}