/* ============================================
   Niroo Gostar Eram — Design Tokens
   Palette: steel blue, copper/amber (wiring), concrete gray, off-white
   Typography: Space Grotesk (display) + Inter (body) for EN
               Vazirmatn (display + body) for FA
   Signature: single-line schematic diagram motif (blueprint grid + circuit nodes)
   ============================================ */

:root {
  --steel-900: #0f2436;
  --steel-700: #1d3d57;
  --steel-500: #3a6280;
  --copper: #c8702f;
  --copper-light: #e8a166;
  --concrete-100: #f3f1ec;
  --concrete-200: #e7e3da;
  --ink: #1a1f24;
  --ink-soft: #5a6470;
  --white: #ffffff;

  --font-display: 'Space Grotesk', sans-serif;
  --font-body: 'Inter', sans-serif;
  --font-fa: 'Vazirmatn', sans-serif;
  --font-brand-en: 'Oswald', sans-serif;
  --font-brand-fa: 'Reem Kufi', sans-serif;

  --max-width: 1140px;
  --radius: 2px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  color: var(--ink);
  background: var(--white);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

html[lang="fa"] body,
html[lang="fa"] * {
  font-family: var(--font-fa);
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }

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

/* ---------- Blueprint grid background (signature motif) ---------- */
.blueprint-bg {
  background-color: var(--steel-900);
  background-image:
    linear-gradient(rgba(255,255,255,0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.045) 1px, transparent 1px);
  background-size: 40px 40px;
  position: relative;
}

/* ---------- Header / Nav ---------- */
header.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--white);
  border-bottom: 1px solid var(--concrete-200);
}

.nav-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 24px;
  max-width: var(--max-width);
  margin: 0 auto;
}

.logo-mark {
  display: flex;
  align-items: center;
  gap: 14px;
  font-family: var(--font-brand-en);
  font-weight: 700;
  font-size: 1.45rem;
  letter-spacing: 0.015em;
  text-transform: uppercase;
  color: var(--steel-900);
}
html[lang="fa"] .logo-mark {
  font-family: var(--font-brand-fa);
  font-size: 1.4rem;
  font-weight: 600;
  text-transform: none;
  letter-spacing: 0;
}

.logo-mark img { height: 90px; width: auto; }
@media (max-width: 480px) {
  .logo-mark img { height: 44px; }
  .logo-mark { font-size: 1.15rem; }
  html[lang="fa"] .logo-mark { font-size: 1.1rem; }
}

nav.main-nav { display: flex; align-items: center; gap: 32px; }

nav.main-nav a {
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--ink-soft);
  position: relative;
  padding: 4px 0;
  transition: color 0.2s ease;
}
nav.main-nav a:hover, nav.main-nav a.active { color: var(--steel-900); }
nav.main-nav a.active::after {
  content: '';
  position: absolute;
  bottom: -2px; left: 0; right: 0;
  height: 2px;
  background: var(--copper);
}

.lang-toggle {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.85rem;
  font-weight: 600;
  border: 1px solid var(--concrete-200);
  padding: 6px 14px;
  border-radius: var(--radius);
  color: var(--steel-700);
  transition: border-color 0.2s ease, color 0.2s ease;
}
.lang-toggle:hover { border-color: var(--copper); color: var(--copper); }

.nav-toggle-btn {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
}
.nav-toggle-btn span { width: 22px; height: 2px; background: var(--steel-900); }

/* ---------- Hero ---------- */
.hero {
  color: var(--white);
  padding: 96px 0 88px;
  overflow: hidden;
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 0.8rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--copper-light);
  font-weight: 600;
  margin-bottom: 24px;
}
.hero-eyebrow::before {
  content: '';
  width: 28px; height: 1px;
  background: var(--copper-light);
}

.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2.1rem, 4.5vw, 3.6rem);
  font-weight: 700;
  line-height: 1.12;
  max-width: 760px;
  margin-bottom: 22px;
}
html[lang="fa"] .hero h1 { font-family: var(--font-fa); line-height: 1.5; }

.hero p.lead {
  font-size: 1.08rem;
  color: rgba(255,255,255,0.78);
  max-width: 560px;
  margin-bottom: 36px;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
  font-size: 0.95rem;
  padding: 13px 28px;
  border-radius: var(--radius);
  transition: transform 0.15s ease, background 0.2s ease;
}
.btn-primary {
  background: var(--copper);
  color: var(--white);
}
.btn-primary:hover { background: var(--copper-light); transform: translateY(-1px); }
.btn-outline {
  border: 1px solid rgba(255,255,255,0.35);
  color: var(--white);
}
.btn-outline:hover { border-color: var(--copper-light); color: var(--copper-light); }
.btn-row { display: flex; gap: 16px; flex-wrap: wrap; }

/* ---------- Schematic line decoration ---------- */
.schematic-line {
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0.9;
}

/* ---------- Section headings ---------- */
.section { padding: 80px 0; }
.section-tight { padding: 56px 0; }
.section-alt { background: var(--concrete-100); }

.section-label {
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--copper);
  font-weight: 700;
  margin-bottom: 12px;
  display: block;
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 700;
  color: var(--steel-900);
  margin-bottom: 16px;
  max-width: 640px;
}
html[lang="fa"] .section-title { font-family: var(--font-fa); }

.section-intro {
  color: var(--ink-soft);
  max-width: 600px;
  font-size: 1.02rem;
}

/* ---------- Service spec rows (signature device: technical spec-sheet style) ---------- */
.spec-list { margin-top: 48px; border-top: 1px solid var(--concrete-200); }

.spec-row {
  display: grid;
  grid-template-columns: 90px 1fr 1.4fr;
  gap: 32px;
  padding: 32px 0;
  border-bottom: 1px solid var(--concrete-200);
  align-items: start;
}

.spec-index {
  font-family: var(--font-display);
  font-size: 0.85rem;
  color: var(--copper);
  font-weight: 700;
  padding-top: 4px;
}

.spec-name {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--steel-900);
}
html[lang="fa"] .spec-name { font-family: var(--font-fa); }

.spec-desc { color: var(--ink-soft); font-size: 0.98rem; }
.spec-desc ul { margin-top: 10px; padding-inline-start: 18px; }
.spec-desc li { margin-bottom: 4px; }

/* ---------- Cards ---------- */
.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  margin-top: 44px;
}

.value-card {
  border: 1px solid var(--concrete-200);
  padding: 28px 24px;
  border-radius: var(--radius);
}
.value-card .num {
  font-family: var(--font-display);
  color: var(--copper);
  font-weight: 700;
  font-size: 0.85rem;
  margin-bottom: 14px;
}
.value-card h3 {
  font-family: var(--font-display);
  font-size: 1.05rem;
  color: var(--steel-900);
  margin-bottom: 8px;
}
html[lang="fa"] .value-card h3 { font-family: var(--font-fa); }
.value-card p { color: var(--ink-soft); font-size: 0.93rem; }

/* ---------- About / timeline ---------- */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: start;
}

.fact-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 32px;
  margin-top: 36px;
  padding-top: 28px;
  border-top: 1px solid var(--concrete-200);
}
.fact-strip div { min-width: 140px; }
.fact-num {
  font-family: var(--font-display);
  font-size: 1.7rem;
  font-weight: 700;
  color: var(--steel-900);
  display: block;
}
.fact-label { font-size: 0.85rem; color: var(--ink-soft); }

/* ---------- Contact ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 56px;
}

.contact-info-item {
  display: flex;
  gap: 16px;
  margin-bottom: 28px;
  align-items: flex-start;
}
.contact-info-item .ico {
  width: 38px; height: 38px;
  flex-shrink: 0;
  border-radius: 50%;
  background: var(--steel-900);
  color: var(--copper-light);
  display: flex; align-items: center; justify-content: center;
  font-size: 1rem;
}
.contact-info-item h4 {
  font-family: var(--font-display);
  font-size: 0.95rem;
  color: var(--steel-900);
  margin-bottom: 4px;
}
html[lang="fa"] .contact-info-item h4 { font-family: var(--font-fa); }
.contact-info-item p, .contact-info-item a { color: var(--ink-soft); font-size: 0.93rem; }

form.contact-form { display: flex; flex-direction: column; gap: 18px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
label {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--steel-700);
  margin-bottom: 6px;
  display: block;
}
input, textarea, select {
  width: 100%;
  border: 1px solid var(--concrete-200);
  padding: 12px 14px;
  font-family: inherit;
  font-size: 0.95rem;
  border-radius: var(--radius);
  background: var(--concrete-100);
  color: var(--ink);
}
html[lang="fa"] input, html[lang="fa"] textarea, html[lang="fa"] select { font-family: var(--font-fa); }
input:focus, textarea:focus, select:focus {
  outline: 2px solid var(--copper);
  outline-offset: 1px;
  background: var(--white);
}
textarea { resize: vertical; min-height: 130px; }

/* ---------- Footer ---------- */
footer.site-footer {
  background: var(--steel-900);
  color: rgba(255,255,255,0.7);
  padding: 48px 0 28px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 32px;
  border-bottom: 1px solid rgba(255,255,255,0.12);
}
.footer-grid h4 {
  font-family: var(--font-display);
  color: var(--white);
  font-size: 0.95rem;
  margin-bottom: 16px;
}
html[lang="fa"] .footer-grid h4 { font-family: var(--font-fa); }
.footer-grid a, .footer-grid p { font-size: 0.88rem; display: block; margin-bottom: 10px; color: rgba(255,255,255,0.65); }
.footer-grid a:hover { color: var(--copper-light); }
.footer-bottom {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  padding-top: 24px;
  font-size: 0.8rem;
  color: rgba(255,255,255,0.45);
}

/* ---------- Blog ---------- */
.post-card {
  display: block;
  border: 1px solid var(--concrete-200);
  padding: 24px;
  border-radius: var(--radius);
  margin-bottom: 20px;
  transition: border-color 0.2s ease;
}
.post-card:hover { border-color: var(--copper); }
.post-date { font-size: 0.78rem; color: var(--copper); font-weight: 700; letter-spacing: 0.05em; text-transform: uppercase; }
.post-card h3 { font-family: var(--font-display); font-size: 1.2rem; color: var(--steel-900); margin: 10px 0 8px; }
html[lang="fa"] .post-card h3 { font-family: var(--font-fa); }
.post-card p { color: var(--ink-soft); font-size: 0.95rem; }

.post-body { max-width: 720px; }
.post-body h1 { font-family: var(--font-display); font-size: 2rem; color: var(--steel-900); margin-bottom: 12px; }
html[lang="fa"] .post-body h1 { font-family: var(--font-fa); }
.post-body p { margin-bottom: 18px; color: var(--ink); }

/* ---------- RTL adjustments ---------- */
html[lang="fa"] { direction: rtl; }
html[lang="fa"] .hero-eyebrow::before { order: 2; }
html[lang="fa"] .spec-row { grid-template-columns: 1.4fr 1fr 90px; }
html[lang="fa"] .spec-row > .spec-index { order: 3; text-align: left; }
html[lang="fa"] .spec-row > .spec-name { order: 2; }
html[lang="fa"] .spec-row > .spec-desc { order: 1; }
html[lang="fa"] nav.main-nav a.active::after { left: auto; right: 0; }

/* ---------- Responsive ---------- */
@media (max-width: 860px) {
  .about-grid, .contact-grid, .footer-grid { grid-template-columns: 1fr; }
  .grid-3 { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .spec-row, html[lang="fa"] .spec-row { grid-template-columns: 1fr; gap: 8px; }
  nav.main-nav { display: none; }
  nav.main-nav.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 100%; left: 0; right: 0;
    background: var(--white);
    padding: 20px 24px;
    border-bottom: 1px solid var(--concrete-200);
    gap: 18px;
  }
  .nav-toggle-btn { display: flex; }
}

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; scroll-behavior: auto !important; }
}