:root{
  --lapis: #1B3F73;
  --lapis-deep: #12294F;
  --lapis-light: #3566A8;
  --lapis-pale: #EAF0F8;
  --gold: #C7A44A;
  --bg: #FAFAF8;
  --ink: #1E2124;
  --ink-soft: #666B70;
  --rule: #E1E4EA;
  --card: #FFFFFF;
}

*{margin:0; padding:0; box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  background:var(--bg);
  color:var(--ink);
  font-family:'Vazirmatn', 'Inter', sans-serif;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}

/* ===== Homepage: nav hidden until scroll ===== */
body.home .site-nav{
  position:fixed;
  top:0; left:0; right:0;
  opacity:0;
  transform:translateY(-8px);
  pointer-events:none;
  transition:opacity .25s ease, transform .25s ease;
}
body.home .site-nav.visible{
  opacity:1;
  transform:translateY(0);
  pointer-events:auto;
}
a{color:inherit; text-decoration:none;}
img{display:block; max-width:100%;}

.wrap{max-width:1080px; margin:0 auto; padding:0 32px;}

/* ===== Nav ===== */
.site-nav{
  position:sticky; top:0; z-index:50;
  background:rgba(250,250,248,0.92);
  backdrop-filter:blur(6px);
  border-bottom:1px solid var(--rule);
}
.site-nav .row{
  display:flex; align-items:center; justify-content:space-between;
  padding:16px 0;
}
.site-nav .brand{
  font-weight:700; font-size:1.15rem; color:var(--lapis-deep);
}
.site-nav .brand span{color:var(--gold);}
.site-nav nav{display:flex; gap:26px; font-size:0.92rem; color:var(--ink-soft);}
.site-nav nav a:hover{color:var(--lapis);}

/* ===== Hero ===== */
.hero{
  position:relative;
  padding:100px 0 90px;
  text-align:center;
  display:flex; flex-direction:column; align-items:center;
  background:
    linear-gradient(var(--bg), var(--bg)),
    repeating-linear-gradient(0deg, rgba(27,63,115,0.05) 0 1px, transparent 1px 64px),
    repeating-linear-gradient(90deg, rgba(27,63,115,0.05) 0 1px, transparent 1px 64px);
}
.logo-box{
  width:140px; height:140px; border-radius:18px;
  background:var(--lapis);
  display:flex; align-items:center; justify-content:center;
  color:#fff; font-weight:700; font-size:2.1rem; letter-spacing:1px;
  margin-bottom:32px;
}
.logo-img{
  width:100%;
  max-width:640px;
  height:auto;
  margin-bottom:36px;
}
.nav-logo{
  height:30px;
  width:auto;
  display:block;
}
.tagline-fa{font-size:clamp(0.95rem, 2.6vw, 1.5rem); font-weight:600; margin-bottom:8px; white-space:nowrap; padding:0 12px;}
.tagline-en{font-family:'Inter', sans-serif; color:var(--ink-soft); font-size:clamp(0.72rem, 1.7vw, 0.98rem); margin-bottom:48px; white-space:nowrap; padding:0 12px;}

.icon-row{display:flex; gap:56px; justify-content:center;}
.icon-item{display:flex; flex-direction:column; align-items:center; gap:12px; transition:transform .18s ease;}
.icon-item:hover{transform:translateY(-4px);}
.icon-circle{
  width:76px; height:76px; border-radius:50%;
  background:#fff; border:1px solid var(--rule);
  display:flex; align-items:center; justify-content:center;
  transition:border-color .18s ease, box-shadow .18s ease;
}
.icon-item:hover .icon-circle{border-color:var(--lapis); box-shadow:0 8px 20px rgba(27,63,115,0.14);}
.icon-circle svg{width:30px; height:30px; stroke:var(--lapis);}
.icon-label{font-size:0.95rem; font-weight:500;}

/* ===== Section shared ===== */
section{padding:80px 0;}
.section-head{
  display:flex; align-items:baseline; justify-content:space-between;
  margin-bottom:40px; border-bottom:1px solid var(--rule); padding-bottom:16px;
}
.section-head h2{font-size:1.6rem; font-weight:700;}
.section-head .count{font-size:0.85rem; color:var(--lapis); font-weight:600;}

/* ===== About ===== */
.about-grid{display:grid; grid-template-columns:1fr 1fr; gap:50px; align-items:center;}
.about-grid img{border-radius:8px; aspect-ratio:4/3; object-fit:cover; width:100%;}
.about-grid p{color:var(--ink-soft); margin-bottom:14px;}
.about-grid p:first-child{color:var(--ink); font-size:1.08rem;}

/* ===== Services ===== */
.services-grid{display:grid; grid-template-columns:repeat(3, 1fr); gap:24px;}
.service-card{
  background:var(--card); border:1px solid var(--rule); border-radius:10px;
  padding:28px 22px;
}
.service-card .num{color:var(--gold); font-weight:700; font-size:1.1rem; margin-bottom:14px;}
.service-card h3{font-size:1.05rem; font-weight:700; margin-bottom:10px;}
.service-card p{font-size:0.92rem; color:var(--ink-soft);}

/* ===== Project grid (shared by projects.html and home "recent") ===== */
.project-grid{
  display:grid; grid-template-columns:repeat(3, 1fr); gap:20px;
}
.project-card{
  position:relative; border-radius:8px; overflow:hidden;
  aspect-ratio:4/3; display:block;
}
.project-card img{
  width:100%; height:100%; object-fit:cover;
  transition:filter .25s ease, transform .3s ease;
}
.project-card .overlay{
  position:absolute; inset:0;
  display:flex; align-items:flex-end;
  padding:18px;
  background:linear-gradient(0deg, rgba(18,41,79,0.0) 40%, rgba(18,41,79,0.0) 100%);
  transition:background .25s ease;
}
.project-card .overlay span{
  color:#fff; font-weight:600; font-size:1rem;
  opacity:0; transform:translateY(6px);
  transition:opacity .25s ease, transform .25s ease;
}
.project-card:hover img{filter:brightness(0.45); transform:scale(1.03);}
.project-card:hover .overlay{background:linear-gradient(0deg, rgba(18,41,79,0.75) 0%, rgba(18,41,79,0.15) 100%);}
.project-card:hover .overlay span{opacity:1; transform:translateY(0);}

@media (max-width:780px){
  .project-grid{grid-template-columns:repeat(2, 1fr);}
  .services-grid{grid-template-columns:1fr;}
  .about-grid{grid-template-columns:1fr;}
}
@media (max-width:520px){
  .project-grid{grid-template-columns:1fr;}
  .icon-row{gap:36px;}
}

/* ===== Contact ===== */
footer{background:var(--lapis-deep); color:#EDF1F7; padding:70px 0 40px; margin-top:20px;}
footer h2{font-size:1.9rem; margin-bottom:14px;}
footer p.sub{color:rgba(237,241,247,0.72); max-width:56ch; margin-bottom:34px;}
.contact-list{display:flex; flex-direction:column; gap:14px; margin-bottom:50px; max-width:420px;}
.contact-row{
  display:flex; align-items:center; gap:14px;
  border:1px solid rgba(237,241,247,0.22); border-radius:8px;
  padding:14px 18px; transition:background .2s ease, border-color .2s ease;
}
.contact-row:hover{background:rgba(237,241,247,0.08); border-color:rgba(237,241,247,0.5);}
.contact-row svg{width:20px; height:20px; stroke:var(--gold); flex-shrink:0;}
.contact-row .label{font-size:0.78rem; color:rgba(237,241,247,0.6);}
.contact-row .value{font-size:0.98rem; font-weight:500;}
.footer-bottom{
  border-top:1px solid rgba(237,241,247,0.18); padding-top:22px;
  font-size:0.8rem; color:rgba(237,241,247,0.55);
}

/* ===== Projects listing page header ===== */
.page-header{
  background:var(--lapis-deep); color:#fff; padding:60px 0 50px; text-align:center;
}
.page-header h1{font-size:2rem; margin-bottom:10px;}
.page-header p{color:rgba(237,241,247,0.75);}
.breadcrumb{font-size:0.85rem; color:rgba(237,241,247,0.65); margin-bottom:14px;}
.breadcrumb a{color:var(--gold);}

/* ===== Project detail page ===== */
.project-hero{aspect-ratio:16/7; overflow:hidden; border-radius:10px; margin-bottom:36px;}
.project-hero img{width:100%; height:100%; object-fit:cover;}
.project-desc{max-width:70ch; color:var(--ink-soft); margin-bottom:44px; font-size:1.02rem;}
.project-desc strong{color:var(--ink);}
.gallery-grid{display:grid; grid-template-columns:repeat(3, 1fr); gap:18px;}
.gallery-grid img{border-radius:8px; aspect-ratio:4/3; object-fit:cover; width:100%;}
.gallery-grid a:first-child{grid-column:span 2; grid-row:span 2;}
.gallery-grid a:first-child img{aspect-ratio:1/1;}
@media (max-width:700px){
  .gallery-grid{grid-template-columns:repeat(2,1fr);}
  .gallery-grid a:first-child{grid-column:span 2;}
}

.back-link{display:inline-flex; align-items:center; gap:6px; color:var(--lapis); font-size:0.92rem; margin-bottom:26px;}
.back-link:hover{text-decoration:underline;}