:root{
  --bg:#0E1418;
  --bg-alt:#141C22;
  --panel:#1B252C;
  --panel-2:#212D35;
  --line:#2A3841;
  --line-soft:#22303840;
  --text:#ECEEF0;
  --text-mute:#93A3AC;
  --text-dim:#63737C;
  --accent-orange:#E8720C;
  --accent-orange-soft:#E8720C22;
  --accent-blue:#4F8FC0;
  --accent-blue-soft:#4F8FC022;
  --white:#FFFFFF;
  --radius:6px;
  --shadow:0 10px 30px -12px #00000070;
  --ff:'Vazirmatn', Tahoma, sans-serif;
  --container:1180px;
}

*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--ff);
  background:var(--bg);
  color:var(--text);
  line-height:1.9;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
ul{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4,h5{margin:0;font-weight:800;}
p{margin:0;}
button{font-family:var(--ff);cursor:pointer;}

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

::selection{background:var(--accent-orange);color:#fff;}

/* focus visibility */
a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible, select:focus-visible{
  outline:2px solid var(--accent-orange);
  outline-offset:3px;
}

@media (prefers-reduced-motion: reduce){
  *{animation-duration:0.01ms !important; animation-iteration-count:1 !important; transition-duration:0.01ms !important; scroll-behavior:auto !important;}
}

/* ===================== دکمه‌ها ===================== */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:14px 28px;
  border-radius:3px;
  font-weight:700;
  font-size:15px;
  border:1.5px solid transparent;
  transition:transform .2s ease, background .25s ease, border-color .25s ease, color .25s ease;
  white-space:nowrap;
}
.btn-orange{
  background:var(--accent-orange);
  color:#fff;
  box-shadow:0 8px 22px -8px #E8720C80;
}
.btn-orange:hover{transform:translateY(-2px);background:#fb8318;}
.btn-outline{
  border-color:#5A6B75;
  color:var(--text);
}
.btn-outline:hover{border-color:var(--accent-orange);color:var(--accent-orange);transform:translateY(-2px);}
.btn.full{width:100%;}

/* ===================== نوار پیشرفت اسکرول ===================== */
.scroll-progress{position:fixed;top:0;right:0;left:0;height:3px;z-index:1000;background:transparent;}
.scroll-progress-bar{height:100%;width:0%;background:linear-gradient(90deg, var(--accent-orange), var(--accent-blue));transition:width .1s linear;}

/* ===================== دکمه بازگشت به بالا ===================== */
#backToTop{
  position:fixed;
  bottom:26px;
  left:26px;
  width:46px;height:46px;
  border-radius:50%;
  background:var(--panel-2);
  border:1px solid var(--line);
  color:var(--accent-orange);
  display:flex;align-items:center;justify-content:center;
  opacity:0;
  visibility:hidden;
  transform:translateY(10px);
  transition:opacity .3s, transform .3s, background .2s;
  z-index:900;
}
#backToTop.show{opacity:1;visibility:visible;transform:translateY(0);}
#backToTop:hover{background:var(--accent-orange);color:#fff;}
#backToTop svg{width:20px;height:20px;fill:currentColor;}

/* ===================== هدر ===================== */
.site-header{
  position:fixed;
  top:0;left:0;right:0;
  z-index:800;
  padding:16px 0;
  background:transparent;
  transition:padding .3s ease, box-shadow .3s ease, border-color .3s ease;
  border-bottom:1px solid transparent;
}
.header-bg{
  position:absolute;
  inset:0;
  background:transparent;
  backdrop-filter:blur(0px);
  transition:background .35s ease, backdrop-filter .35s ease;
  z-index:-1;
  pointer-events:none;
}
.site-header.scrolled{
  padding:10px 0;
  border-color:var(--line);
  box-shadow:var(--shadow);
}
.site-header.scrolled .header-bg{
  background:#0E1418E6;
  backdrop-filter:blur(10px);
}
.header-inner{
  position:relative;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
}
.brand{display:flex;align-items:center;gap:10px;}
.brand-mark{width:38px;height:38px;color:var(--text);flex-shrink:0;}
.brand-mark svg{width:100%;height:100%;}
.brand-mark.small{width:30px;height:30px;}
.brand-text{display:flex;flex-direction:column;line-height:1.3;}
.brand-text strong{font-size:16px;letter-spacing:.2px;}
.brand-text small{font-size:11px;color:var(--text-mute);}

.main-nav{display:flex;align-items:center;gap:26px;}
.nav-link{
  font-size:14.5px;
  color:var(--text-mute);
  position:relative;
  padding:6px 0;
  margin-inline-start:22px;
  transition:color .2s;
}
.nav-link:first-child{margin-inline-start:0;}
.nav-link::after{
  content:'';
  position:absolute;
  right:0;bottom:0;
  height:2px;width:0;
  background:var(--accent-orange);
  transition:width .25s ease;
}
.nav-link:hover{color:var(--text);}
.nav-link:hover::after{width:100%;}

.header-cta{padding:10px 22px;font-size:14px;}

.hamburger{
  display:none;
  flex-direction:column;
  gap:5px;
  background:transparent;
  border:0;
  padding:6px;
}
.hamburger span{width:24px;height:2px;background:var(--text);transition:transform .3s, opacity .3s;}
.hamburger.open span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.hamburger.open span:nth-child(2){opacity:0;}
.hamburger.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}

.hero{
  position:relative;
  min-height:100vh;
  display:flex;
  align-items:center;
  padding:150px 0 90px;
  overflow:hidden;
  background:
    radial-gradient(ellipse at 80% 10%, #4F8FC01a, transparent 55%),
    radial-gradient(ellipse at 10% 90%, #E8720C14, transparent 50%),
    var(--bg);
}
.hero-grid{
  position:absolute;inset:0;
  background-image:
    linear-gradient(var(--line-soft) 1px, transparent 1px),
    linear-gradient(90deg, var(--line-soft) 1px, transparent 1px);
  background-size:44px 44px;
  mask-image:linear-gradient(to bottom, #000 0%, transparent 82%);
  opacity:.7;
}
.hero-hatch{
  position:absolute;
  inset:0;
  background-image:repeating-linear-gradient(45deg, #ffffff08 0 2px, transparent 2px 14px);
  pointer-events:none;
}
.hero-hatch.faint{opacity:.5;}
.corner-mark{position:absolute;width:70px;height:70px;border:2px solid var(--accent-orange);opacity:.55;}
.corner-mark.top-right{top:40px;left:40px;border-left:none;border-bottom:none;}
.corner-mark.bottom-left{bottom:40px;right:40px;border-right:none;border-top:none;}

.hero-inner{position:relative;z-index:2;}
.hero-content{max-width:820px;}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:13px;
  color:var(--accent-orange);
  background:var(--accent-orange-soft);
  border:1px solid #E8720C40;
  padding:7px 16px;
  border-radius:30px;
  margin-bottom:22px;
  letter-spacing:.2px;
}
.hero-title{
  font-size:clamp(32px, 5.4vw, 60px);
  line-height:1.25;
  margin-bottom:20px;
  letter-spacing:-.5px;
}
.accent-text{color:var(--accent-orange);}
.hero-typing-wrap{
  font-size:clamp(18px,2.4vw,24px);
  color:var(--text);
  margin-bottom:22px;
  font-weight:600;
  min-height:34px;
}
.typing{color:var(--accent-blue);font-weight:800;}
.cursor{color:var(--accent-orange);animation:blink 1s step-end infinite;}
@keyframes blink{50%{opacity:0;}}

.hero-desc{
  color:var(--text-mute);
  font-size:16px;
  max-width:640px;
  margin-bottom:34px;
}
.hero-actions{display:flex;gap:16px;flex-wrap:wrap;margin-bottom:56px;}

.hero-stats{
  display:grid;
  grid-template-columns:repeat(4,auto);
  gap:34px;
  border-top:1px solid var(--line);
  padding-top:28px;
  max-width:720px;
}
.hero-stat{display:flex;flex-direction:column;gap:4px;}
.hero-stat .num{font-size:30px;font-weight:800;color:var(--accent-orange);font-variant-numeric:tabular-nums;}
.hero-stat small{color:var(--text-mute);font-size:12.5px;}

.scroll-cue{
  position:absolute;
  bottom:26px;right:50%;transform:translateX(50%);
  display:flex;flex-direction:column;align-items:center;gap:8px;
  font-size:12px;color:var(--text-dim);
  z-index:2;
}
.scroll-cue span{
  width:1px;height:36px;
  background:linear-gradient(var(--accent-orange), transparent);
  animation:cue 1.8s ease-in-out infinite;
}
@keyframes cue{0%{transform:scaleY(0);transform-origin:top;}50%{transform:scaleY(1);transform-origin:top;}51%{transform-origin:bottom;}100%{transform:scaleY(0);transform-origin:bottom;}}

.section{position:relative;padding:110px 0;}
.section-alt{background:var(--bg-alt);}
.section-dark{
  background:#0A0F13;
  color:#fff;
}
.section-head{max-width:680px;margin-bottom:56px;}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center;}
.section-eyebrow{
  display:inline-block;
  font-size:13px;
  font-weight:700;
  color:var(--accent-orange);
  letter-spacing:.3px;
  margin-bottom:12px;
}
.section-eyebrow.light{color:var(--accent-orange);}
.section-title{
  font-size:clamp(26px,3.4vw,38px);
  line-height:1.4;
  margin-bottom:14px;
}
.section-title.light{color:#fff;}
.section-lead{color:var(--text-mute);font-size:16px;}

/* reveal on scroll */
.reveal{opacity:0;transform:translateY(26px);transition:opacity .7s ease, transform .7s ease;}
.reveal.in{opacity:1;transform:translateY(0);}

.about-grid{
  display:grid;
  grid-template-columns:.9fr 1.1fr;
  gap:70px;
  align-items:center;
}
.blueprint-card{
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:34px 30px;
  position:relative;
  box-shadow:var(--shadow);
}
.blueprint-card::before{
  content:'';
  position:absolute;inset:10px;
  border:1px dashed #3A4A54;
  border-radius:4px;
  pointer-events:none;
}
.blueprint-row{
  display:flex;
  justify-content:space-between;
  gap:10px;
  padding:14px 4px;
  border-bottom:1px solid var(--line);
  font-size:14.5px;
}
.blueprint-row:last-of-type{border-bottom:none;}
.blueprint-row span{color:var(--text-mute);}
.blueprint-row b{color:var(--text);font-weight:700;}
.blueprint-seal{
  position:absolute;
  top:-14px;left:-14px;
  background:var(--accent-orange);
  color:#fff;
  font-size:12px;
  font-weight:800;
  padding:8px 14px;
  border-radius:30px;
  transform:rotate(-8deg);
  box-shadow:0 8px 18px -6px #E8720C80;
}
.about-content p{color:var(--text-mute);margin-bottom:18px;font-size:15.5px;}
.about-checklist{margin-top:22px;display:flex;flex-direction:column;gap:12px;}
.about-checklist li{
  position:relative;
  padding-right:30px;
  font-size:15px;
  color:var(--text);
}
.about-checklist li::before{
  content:'✓';
  position:absolute;right:0;top:0;
  color:var(--accent-orange);
  font-weight:800;
}

.services-grid{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:22px;
}
.service-card{
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:30px 24px;
  transition:transform .3s ease, border-color .3s ease, background .3s ease;
}
.service-card:hover{
  transform:translateY(-6px);
  border-color:#3E7CB170;
  background:var(--panel-2);
}
.service-icon{
  width:52px;height:52px;
  display:flex;align-items:center;justify-content:center;
  color:var(--accent-blue);
  background:var(--accent-blue-soft);
  border-radius:10px;
  margin-bottom:18px;
}
.service-icon svg{width:26px;height:26px;}
.service-card h3{font-size:17px;margin-bottom:10px;line-height:1.5;}
.service-card p{color:var(--text-mute);font-size:14.2px;}

.process-track{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:0;
  border-top:1px solid var(--line);
  border-right:1px solid var(--line);
}
.process-step{
  border-left:1px solid var(--line);
  border-bottom:1px solid var(--line);
  padding:28px 22px;
  position:relative;
}
.step-num{
  display:block;
  font-size:26px;
  font-weight:800;
  color:var(--accent-orange);
  margin-bottom:10px;
  font-variant-numeric:tabular-nums;
}
.process-step h4{font-size:15.5px;margin-bottom:8px;}
.process-step p{font-size:13.5px;color:var(--text-mute);}

.stats-grid{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:24px;
  text-align:center;
}
.stat-box{
  padding:34px 20px;
  border:1px solid #2A3841;
  border-radius:var(--radius);
  background:#111A20;
}
.stat-box .num{
  display:block;
  font-size:40px;
  font-weight:800;
  color:var(--accent-orange);
  font-variant-numeric:tabular-nums;
  margin-bottom:8px;
}
.stat-box p{color:var(--text-mute);font-size:14px;}

.articles-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:24px;
}
.article-card{
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:28px 24px;
  transition:transform .3s ease, border-color .3s;
}
.article-card:hover{transform:translateY(-6px);border-color:#E8720C55;}
.article-tag{
  display:inline-block;
  font-size:11.5px;
  font-weight:700;
  color:var(--accent-blue);
  background:var(--accent-blue-soft);
  padding:5px 12px;
  border-radius:20px;
  margin-bottom:14px;
}
.article-card h3{font-size:16.5px;line-height:1.6;margin-bottom:12px;}
.article-card p{font-size:14px;color:var(--text-mute);}

.safety-grid{
  display:grid;
  grid-template-columns:1.2fr .8fr;
  gap:60px;
  align-items:center;
}
.safety-content p{color:var(--text-mute);font-size:15.5px;margin-bottom:26px;}
.safety-list{display:flex;flex-direction:column;gap:18px;}
.safety-item{display:flex;gap:14px;align-items:flex-start;}
.safety-icon{
  flex-shrink:0;
  width:28px;height:28px;
  border-radius:50%;
  background:var(--accent-orange-soft);
  color:var(--accent-orange);
  display:flex;align-items:center;justify-content:center;
  font-weight:800;
  font-size:13px;
}
.safety-item b{font-size:15px;display:block;margin-bottom:4px;}
.safety-item p{color:var(--text-mute);font-size:13.8px;}
.safety-visual{display:flex;justify-content:center;}
.safety-badge{
  width:230px;height:230px;
  border-radius:50%;
  border:1px dashed #3A4A54;
  display:flex;flex-direction:column;
  align-items:center;justify-content:center;
  gap:14px;
  color:var(--accent-orange);
  animation:spin-slow 26s linear infinite;
}
.safety-badge svg{width:70px;height:70px;animation:spin-slow-reverse 26s linear infinite;}
.safety-badge span{
  font-size:12.5px;
  color:var(--text-mute);
  max-width:140px;
  text-align:center;
  animation:spin-slow-reverse 26s linear infinite;
}
@keyframes spin-slow{from{transform:rotate(0)}to{transform:rotate(360deg)}}
@keyframes spin-slow-reverse{from{transform:rotate(0)}to{transform:rotate(-360deg)}}

.contracts-cols{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:40px;
}
.contract-col-title{
  font-size:19px;
  margin-bottom:22px;
  padding-bottom:14px;
  border-bottom:2px solid var(--accent-orange);
  display:inline-block;
}
.contract-card{
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:22px;
  margin-bottom:16px;
}
.contract-card h4{font-size:15.5px;margin-bottom:8px;color:var(--accent-blue);}
.contract-card p{font-size:14px;color:var(--text-mute);}

.contact-grid{
  display:grid;
  grid-template-columns:.9fr 1.1fr;
  gap:60px;
  align-items:start;
}
.light-desc{color:#B7C2C9;font-size:15.5px;margin:18px 0 28px;max-width:480px;}
.contact-list{display:flex;flex-direction:column;gap:12px;}
.contact-list li{font-size:14.5px;color:#CBD4D9;border-bottom:1px solid #ffffff14;padding-bottom:10px;}
.contact-list b{color:#fff;margin-left:6px;}

.contact-form{
  background:#111A20;
  border:1px solid #263239;
  border-radius:8px;
  padding:34px;
  display:flex;
  flex-direction:column;
  gap:18px;
}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:18px;}
.contact-form label{
  display:flex;flex-direction:column;
  gap:8px;
  font-size:13.5px;
  color:#9FACB4;
}
.contact-form input, .contact-form select, .contact-form textarea{
  font-family:var(--ff);
  background:#0C1317;
  border:1px solid #2A3841;
  border-radius:5px;
  padding:12px 14px;
  color:#fff;
  font-size:14.5px;
  resize:vertical;
  transition:border-color .2s;
}
.contact-form input:focus, .contact-form select:focus, .contact-form textarea:focus{
  border-color:var(--accent-orange);
  outline:none;
}
.form-note{font-size:13.5px;color:var(--accent-orange);min-height:18px;}

.site-footer{background:#080C0F;padding:70px 0 0;border-top:1px solid #1B242A;}
.footer-grid{
  display:grid;
  grid-template-columns:1.4fr 1fr 1fr 1fr;
  gap:40px;
  padding-bottom:50px;
}
.footer-brand p{color:var(--text-dim);font-size:13.5px;margin-top:16px;max-width:280px;}
.footer-col h5{font-size:14.5px;margin-bottom:18px;color:#fff;}
.footer-col{display:flex;flex-direction:column;gap:12px;}
.footer-col a, .footer-col span{font-size:13.8px;color:var(--text-mute);transition:color .2s;}
.footer-col a:hover{color:var(--accent-orange);}
.footer-bottom{
  border-top:1px solid #1B242A;
  padding:22px 24px;
  display:flex;
  justify-content:space-between;
  flex-wrap:wrap;
  gap:10px;
  font-size:12.8px;
  color:var(--text-dim);
}

@media (max-width:1080px){
  .services-grid{grid-template-columns:repeat(2,1fr);}
  .process-track{grid-template-columns:repeat(2,1fr);}
  .articles-grid{grid-template-columns:repeat(2,1fr);}
  .about-grid, .safety-grid, .contact-grid{grid-template-columns:1fr;gap:40px;}
  .contracts-cols{grid-template-columns:1fr;}
  .stats-grid{grid-template-columns:repeat(2,1fr);}
  .footer-grid{grid-template-columns:1fr 1fr;}
}

@media (max-width:880px){
  .main-nav{
    position:fixed;
    top:0;left:0;right:0;bottom:0;
    background:#0E1418F5;
    backdrop-filter:blur(8px);
    flex-direction:column;
    justify-content:center;
    align-items:center;
    gap:30px;
    transform:translateY(-110%);
    visibility:hidden;
    pointer-events:none;
    transition:transform .4s ease, visibility 0s linear .4s;
    z-index:750;
  }
  .main-nav.open{
    transform:translateY(0);
    visibility:visible;
    pointer-events:auto;
    transition:transform .4s ease, visibility 0s linear 0s;
  }
  .main-nav .nav-link{font-size:19px;}
  .hamburger{display:flex;}
  .header-cta{display:none;}
  .hero{padding-top:130px;}
  .hero-stats{grid-template-columns:repeat(2,1fr);row-gap:26px;}
}

@media (max-width:640px){
  .container{padding:0 18px;}
  .section{padding:76px 0;}
  .services-grid, .articles-grid, .stats-grid{grid-template-columns:1fr;}
  .process-track{grid-template-columns:1fr;}
  .process-step{border-left:none;}
  .form-row{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr;gap:30px;}
  .hero-actions{flex-direction:column;align-self:stretch;}
  .hero-actions .btn{width:100%;}
  .footer-bottom{flex-direction:column;text-align:center;}
  .contract-col-title{font-size:17px;}
  .blueprint-seal{top:-10px;left:-10px;font-size:11px;padding:6px 12px;}
}