/* =========================================================================
   BANGLADESH SCAFFOLDING SERVICES — design tokens & base
   Palette drawn from the company's own brochure: indigo brand mark,
   charcoal cut-lines, safety-vest orange from site photography.
   Signature motif: a drawn scaffold lattice (standards + diagonal braces),
   echoing the diagonal "cut" panels already used across the brochure.
   ========================================================================= */

@import url('https://fonts.googleapis.com/css2?family=Barlow+Condensed:wght@600;700;800&family=Inter:wght@400;500;600;700&family=IBM+Plex+Mono:wght@500&display=swap');

:root {
  --indigo:        #4A43A3;
  --indigo-dark:   #2C2760;
  --charcoal:      #1C1B1F;
  --steel:         #667085;
  --paper:         #F8F7F4;
  --white:         #FFFFFF;
  --safety-orange: #F1650F;
  --line:          #E4E2DC;

  --font-display: 'Barlow Condensed', sans-serif;
  --font-body:    'Inter', sans-serif;
  --font-mono:    'IBM Plex Mono', monospace;

  --radius: 2px;
  --container: 1180px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--charcoal);
  background: var(--white);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

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

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.01em;
  line-height: 1.05;
  margin: 0 0 0.4em;
}

h1 { font-size: clamp(2.4rem, 5vw, 4rem); }
h2 { font-size: clamp(1.9rem, 3.4vw, 2.7rem); }
h3 { font-size: 1.35rem; font-weight: 700; }

p { margin: 0 0 1em; color: #3A3A42; }

.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--safety-orange);
  display: block;
  margin-bottom: 0.6em;
}

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

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 14px 28px;
  border-radius: var(--radius);
  border: 2px solid transparent;
  cursor: pointer;
  transition: transform 0.15s ease, background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}
.btn:hover { transform: translateY(-2px); }
.btn-primary { background: var(--safety-orange); color: var(--white); }
.btn-primary:hover { background: #d95709; }
.btn-outline { border-color: var(--white); color: var(--white); }
.btn-outline:hover { background: var(--white); color: var(--indigo-dark); }
.btn-outline-dark { border-color: var(--charcoal); color: var(--charcoal); }
.btn-outline-dark:hover { background: var(--charcoal); color: var(--white); }

/* =========================================================================
   Signature motif: scaffold lattice pattern (SVG data-uri background)
   Used sparingly — hero sections and section dividers only.
   ========================================================================= */
.lattice-bg {
  background-color: var(--indigo-dark);
  background-image:
    repeating-linear-gradient(115deg, rgba(255,255,255,0.055) 0 2px, transparent 2px 64px),
    repeating-linear-gradient(65deg, rgba(255,255,255,0.055) 0 2px, transparent 2px 64px),
    repeating-linear-gradient(0deg, rgba(255,255,255,0.045) 0 2px, transparent 2px 96px);
}

/* diagonal cut divider, echoes the brochure's triangular panels */
.cut-divider {
  position: relative;
  height: 64px;
  background: var(--white);
}
.cut-divider::before {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--indigo-dark);
  clip-path: polygon(0 0, 42% 0, 22% 100%, 0 100%);
}
.cut-divider::after {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--charcoal);
  clip-path: polygon(48% 0, 62% 0, 42% 100%, 28% 100%);
}

/* =========================================================================
   Header / Nav
   ========================================================================= */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--white);
  border-bottom: 1px solid var(--line);
}
.site-header .inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 24px;
  max-width: var(--container);
  margin: 0 auto;
}
.brand { display: flex; align-items: center; gap: 12px; }
.brand img { height: 46px; width: auto; }
.brand-text { font-family: var(--font-display); font-weight: 800; font-size: 1.05rem; letter-spacing: 0.02em; text-transform: uppercase; color: var(--indigo-dark); line-height: 1.1; }
.brand-text small { display: block; font-family: var(--font-body); font-weight: 500; font-size: 0.62rem; letter-spacing: 0.06em; color: var(--steel); text-transform: none; }

.main-nav ul { list-style: none; display: flex; gap: 30px; margin: 0; padding: 0; }
.main-nav a {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--charcoal);
  padding: 6px 0;
  border-bottom: 2px solid transparent;
  transition: border-color 0.2s ease, color 0.2s ease;
}
.main-nav a:hover, .main-nav a.active { color: var(--indigo); border-color: var(--safety-orange); }

.header-cta { display: flex; align-items: center; gap: 16px; }
.header-phone { font-family: var(--font-mono); font-size: 0.85rem; color: var(--indigo-dark); }
.header-phone strong { display: block; font-size: 0.62rem; color: var(--steel); font-weight: 500; letter-spacing: 0.08em; text-transform: uppercase; }

.nav-toggle { display: none; background: none; border: none; cursor: pointer; padding: 8px; }
.nav-toggle span { display: block; width: 24px; height: 2px; background: var(--charcoal); margin: 5px 0; }

/* =========================================================================
   Hero
   ========================================================================= */
.hero {
  position: relative;
  color: var(--white);
  overflow: hidden;
  min-height: 560px;
  display: flex;
  align-items: flex-end;
}
.hero-media {
  position: absolute; inset: 0;
  background-size: cover;
  background-position: center;
}
.hero-media::after {
  content: "";
  position: absolute; inset: 0;
  background: linear-gradient(0deg, rgba(28,27,31,0.92) 5%, rgba(44,39,96,0.55) 55%, rgba(44,39,96,0.35) 100%);
}
.hero-shape {
  position: absolute;
  right: -10%;
  top: 0;
  bottom: 0;
  width: 55%;
  background: var(--indigo-dark);
  clip-path: polygon(38% 0, 100% 0, 100% 100%, 8% 100%);
  opacity: 0.88;
}
.hero-inner {
  position: relative;
  z-index: 2;
  padding: 120px 24px 72px;
  max-width: var(--container);
  margin: 0 auto;
  width: 100%;
}
.hero-inner h1 { max-width: 780px; }
.hero-inner .lede { max-width: 560px; font-size: 1.08rem; color: #E8E7F2; }
.hero-actions { display: flex; gap: 16px; margin-top: 28px; flex-wrap: wrap; }

.page-hero {
  position: relative;
  color: var(--white);
  min-height: 280px;
  display: flex;
  align-items: center;
}
.page-hero .hero-media::after { background: linear-gradient(100deg, rgba(28,27,31,0.88) 30%, rgba(74,67,163,0.55) 100%); }
.page-hero .hero-inner { padding: 90px 24px 48px; }
.page-hero p { color: #E8E7F2; max-width: 620px; }

/* =========================================================================
   Sections
   ========================================================================= */
section { padding: 88px 0; }
.section-alt { background: var(--paper); }
.section-dark { background: var(--charcoal); color: var(--white); }
.section-dark p { color: #C7C6CE; }
.section-head { max-width: 640px; margin-bottom: 48px; }
.section-head.center { margin-left: auto; margin-right: auto; text-align: center; }

/* Stat strip */
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 32px; }
.stat b { font-family: var(--font-display); font-size: 2.6rem; color: var(--safety-orange); display: block; line-height: 1; }
.stat span { font-family: var(--font-mono); font-size: 0.75rem; letter-spacing: 0.06em; text-transform: uppercase; color: #ADACB6; }

/* Category grid (home teaser) */
.cat-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}
.cat-card {
  background: var(--white);
  padding: 32px 24px;
  transition: background 0.2s ease;
  position: relative;
}
.cat-card:hover { background: var(--paper); }
.cat-card .num { font-family: var(--font-mono); color: var(--safety-orange); font-size: 0.78rem; }
.cat-card h3 { margin: 14px 0 8px; font-size: 1.05rem; }
.cat-card p { font-size: 0.88rem; margin: 0; color: var(--steel); }
.cat-card .go { position: absolute; right: 20px; top: 28px; font-size: 1.2rem; color: var(--line); transition: color 0.2s ease, transform 0.2s ease; }
.cat-card:hover .go { color: var(--safety-orange); transform: translateX(3px); }

/* Why-us list */
.reasons { list-style: none; margin: 0; padding: 0; display: grid; gap: 22px; }
.reasons li { display: flex; gap: 16px; align-items: flex-start; }
.reasons .tick {
  flex: none; width: 28px; height: 28px; border-radius: 50%;
  background: var(--safety-orange); color: var(--white);
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-mono); font-size: 0.8rem;
}

/* About page split */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: center; }
.split img { border-radius: var(--radius); }

/* Product sections (numbered, matches the real catalog numbering) */
.product-section {
  padding: 56px 0;
  border-bottom: 1px solid var(--line);
  scroll-margin-top: 90px;
}
.product-section:nth-child(even) { background: var(--paper); }
.product-head { display: grid; grid-template-columns: 90px 1fr; gap: 24px; align-items: baseline; margin-bottom: 26px; }
.product-head .idx { font-family: var(--font-mono); font-size: 2.4rem; color: var(--line); font-weight: 500; }
.product-body { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 48px; }
.product-body .applications { background: var(--white); border-left: 3px solid var(--safety-orange); padding: 18px 22px; margin-top: 18px; }
.product-body .applications h4 { font-family: var(--font-mono); font-size: 0.75rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--indigo); margin: 0 0 8px; }
.product-body .applications p { margin: 0; font-size: 0.92rem; }
.product-gallery { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.product-gallery img, .product-gallery .ph { aspect-ratio: 4/3; object-fit: cover; background: var(--line); border-radius: var(--radius); }
.product-gallery figure { margin: 0; }
.product-gallery figcaption { font-family: var(--font-mono); font-size: 0.7rem; color: var(--steel); margin-top: 4px; text-align: center; }

/* Product jump nav */
.jump-nav { position: sticky; top: 79px; z-index: 40; background: var(--charcoal); overflow-x: auto; }
.jump-nav ul { list-style: none; display: flex; margin: 0; padding: 0 24px; max-width: var(--container); margin: 0 auto; }
.jump-nav a {
  white-space: nowrap; display: block; padding: 14px 16px;
  font-family: var(--font-mono); font-size: 0.72rem; letter-spacing: 0.05em; text-transform: uppercase;
  color: #ADACB6; border-bottom: 2px solid transparent;
}
.jump-nav a:hover, .jump-nav a.active { color: var(--white); border-color: var(--safety-orange); }

/* Gallery */
.gallery-tabs { display: flex; gap: 12px; margin-bottom: 36px; flex-wrap: wrap; }
.gallery-tab {
  font-family: var(--font-mono); font-size: 0.8rem; letter-spacing: 0.05em; text-transform: uppercase;
  padding: 10px 20px; border: 1px solid var(--line); border-radius: 999px; color: var(--charcoal);
}
.gallery-tab.active { background: var(--indigo-dark); color: var(--white); border-color: var(--indigo-dark); }
.gallery-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
.gallery-grid figure { margin: 0; overflow: hidden; border-radius: var(--radius); }
.gallery-grid img { width: 100%; height: 220px; object-fit: cover; transition: transform 0.35s ease; }
.gallery-grid a:hover img { transform: scale(1.06); }

/* Contact */
.contact-grid { display: grid; grid-template-columns: 0.9fr 1.1fr; gap: 56px; }
.contact-detail { display: flex; gap: 16px; margin-bottom: 26px; }
.contact-detail .ic {
  flex: none; width: 40px; height: 40px; border-radius: 50%;
  background: var(--indigo); color: var(--white);
  display: flex; align-items: center; justify-content: center; font-size: 1rem;
}
.contact-detail h4 { margin: 0 0 4px; font-size: 0.75rem; font-family: var(--font-mono); letter-spacing: 0.08em; text-transform: uppercase; color: var(--steel); }
.contact-detail p { margin: 0; }
.map-frame { width: 100%; height: 260px; border: 0; border-radius: var(--radius); margin-top: 8px; }

.form-field { margin-bottom: 18px; }
.form-field label { display: block; font-family: var(--font-mono); font-size: 0.75rem; letter-spacing: 0.06em; text-transform: uppercase; color: var(--steel); margin-bottom: 6px; }
.form-field input, .form-field textarea {
  width: 100%; padding: 13px 14px; border: 1px solid var(--line); border-radius: var(--radius);
  font-family: var(--font-body); font-size: 0.95rem; background: var(--white);
}
.form-field input:focus, .form-field textarea:focus { outline: 2px solid var(--indigo); outline-offset: 1px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.alert { padding: 14px 18px; border-radius: var(--radius); margin-bottom: 22px; font-size: 0.92rem; }
.alert-success { background: #E9F6EC; color: #1E6B34; border: 1px solid #B9E3C2; }
.alert-error { background: #FBEAEA; color: #A22; border: 1px solid #F1C6C6; }

/* CTA band */
.cta-band { text-align: center; }
.cta-band h2 { color: var(--white); }
.cta-band .btn-primary { margin: 8px; }

/* Footer */
.site-footer { background: var(--charcoal); color: #C7C6CE; padding: 64px 0 24px; }
.footer-grid { display: grid; grid-template-columns: 1.3fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 48px; }
.footer-grid h4 { color: var(--white); font-family: var(--font-mono); font-size: 0.75rem; letter-spacing: 0.08em; text-transform: uppercase; margin-bottom: 16px; }
.footer-grid ul { list-style: none; margin: 0; padding: 0; }
.footer-grid li { margin-bottom: 10px; font-size: 0.9rem; }
.footer-grid a:hover { color: var(--white); }
.footer-brand img { height: 42px; margin-bottom: 14px; }
.footer-bottom { border-top: 1px solid #35333B; padding-top: 22px; display: flex; justify-content: space-between; font-size: 0.8rem; color: #7C7A85; flex-wrap: wrap; gap: 10px; }

/* Floating WhatsApp button */
.whatsapp-float {
  position: fixed; bottom: 24px; right: 24px; z-index: 200;
  width: 56px; height: 56px; border-radius: 50%; background: #25D366; color: var(--white);
  display: flex; align-items: center; justify-content: center; font-size: 1.6rem;
  box-shadow: 0 8px 20px rgba(0,0,0,0.25);
}

/* Placeholder image style */
.ph-block { background: repeating-linear-gradient(45deg, #ECEAE4, #ECEAE4 10px, #E4E2DC 10px, #E4E2DC 20px); display: flex; align-items: center; justify-content: center; color: var(--steel); font-family: var(--font-mono); font-size: 0.7rem; text-transform: uppercase; }

/* =========================================================================
   Responsive
   ========================================================================= */
@media (max-width: 980px) {
  .main-nav, .header-phone { display: none; }
  .nav-toggle { display: block; }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .cat-grid { grid-template-columns: repeat(2, 1fr); }
  .split { grid-template-columns: 1fr; }
  .product-body { grid-template-columns: 1fr; }
  .product-head { grid-template-columns: 56px 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .gallery-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 560px) {
  .cat-grid { grid-template-columns: 1fr; }
  .stats { grid-template-columns: 1fr 1fr; }
  .gallery-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .hero-inner { padding-top: 96px; }
  section { padding: 56px 0; }
}