/* ============================================
   ELD Solutions LLC – Premium Mobile-First CSS
   ============================================ */

/* --- Google Fonts Import --- */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Montserrat:wght@600;700;800;900&display=swap');

/* --- CSS Custom Properties --- */
:root {
  --bg: #f5f8fb;
  --surface: #ffffff;
  --dark-surface: #0d1e2d;
  --darker-surface: #081520;
  --text: #17212b;
  --muted: #5a6978;
  --line: rgba(15,31,45,0.10);

  --primary: #25b7c3;
  --primary-dark: #1096a1;
  --primary-light: #e6f9fa;
  --accent: #ff7d3b;
  --accent-dark: #e56a28;

  --shadow-sm: 0 2px 8px rgba(15,31,45,0.08);
  --shadow-md: 0 6px 24px rgba(15,31,45,0.12);
  --shadow-lg: 0 16px 48px rgba(15,31,45,0.18);

  --radius: 16px;
  --radius-sm: 10px;
  --radius-lg: 24px;

  --max-w: 1180px;
  --header-h: 72px;

  --font-body: 'Inter', system-ui, sans-serif;
  --font-heading: 'Montserrat', system-ui, sans-serif;
}

/* --- Reset & Base --- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }
input, textarea, select {
  font-family: inherit;
  font-size: 1rem;
}

/* --- Layout Utilities --- */
.container {
  width: 100%;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 20px;
}

.section { padding: 80px 0; }
.section-sm { padding: 56px 0; }
.section-lg { padding: 100px 0; }

.section--light { background: var(--bg); }
.section--white { background: var(--surface); }
.section--dark { background: var(--dark-surface); color: #fff; }
.section--darker { background: var(--darker-surface); color: #fff; }

.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 32px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.grid-auto { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 28px; }

/* --- Typography --- */
.section-label {
  display: inline-block;
  font-family: var(--font-heading);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--primary);
  margin-bottom: 12px;
}
.section-label--light { color: rgba(255,255,255,0.7); }

h1, h2, h3, h4 { font-family: var(--font-heading); line-height: 1.2; }
h1 { font-size: clamp(2rem, 5vw, 3.2rem); font-weight: 800; }
h2 { font-size: clamp(1.6rem, 3.5vw, 2.4rem); font-weight: 700; }
h3 { font-size: clamp(1.1rem, 2vw, 1.4rem); font-weight: 700; }
h4 { font-size: 1.05rem; font-weight: 600; }

.text-center { text-align: center; }
.text-muted { color: var(--muted); }
.text-white { color: #fff; }
.text-primary { color: var(--primary); }
.text-accent { color: var(--accent); }

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: 50px;
  font-family: var(--font-heading);
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  transition: all 0.22s ease;
  white-space: nowrap;
}
.btn-primary {
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-dark) 100%);
  color: #fff;
  box-shadow: 0 4px 16px rgba(255,125,59,0.35);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(255,125,59,0.45);
}
.btn-outline {
  background: transparent;
  color: #fff;
  border: 2px solid rgba(255,255,255,0.7);
}
.btn-outline:hover {
  background: rgba(255,255,255,0.12);
  border-color: #fff;
}
.btn-outline-teal {
  background: transparent;
  color: var(--primary);
  border: 2px solid var(--primary);
}
.btn-outline-teal:hover {
  background: var(--primary);
  color: #fff;
}
.btn-teal {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: #fff;
  box-shadow: 0 4px 16px rgba(37,183,195,0.30);
}
.btn-teal:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(37,183,195,0.42);
}
.btn-sm { padding: 10px 20px; font-size: 0.82rem; }
.btn-lg { padding: 18px 36px; font-size: 1rem; }
.btn-full { width: 100%; }

/* --- Top Bar --- */
.topbar {
  background: var(--dark-surface);
  color: rgba(255,255,255,0.80);
  font-size: 0.82rem;
  padding: 8px 0;
}
.topbar__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}
.topbar__contact {
  display: flex;
  align-items: center;
  gap: 20px;
}
.topbar__contact a {
  display: flex;
  align-items: center;
  gap: 6px;
  color: rgba(255,255,255,0.80);
  transition: color 0.18s;
}
.topbar__contact a:hover { color: var(--primary); }
.topbar__badge {
  font-size: 0.75rem;
  color: var(--primary);
  font-weight: 600;
}

/* --- Header / Nav --- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--surface);
  box-shadow: var(--shadow-sm);
  height: var(--header-h);
}
.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  flex-shrink: 0;
}
.brand img {
  height: 48px;
  width: auto;
  object-fit: contain;
}
.nav__list {
  display: flex;
  align-items: center;
  gap: 4px;
}
.nav__list a {
  padding: 8px 14px;
  border-radius: 8px;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text);
  transition: all 0.18s;
}
.nav__list a:hover, .nav__list a.active {
  color: var(--primary);
  background: var(--primary-light);
}
.nav__cta { margin-left: 12px; }
.nav__toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  cursor: pointer;
}
.nav__toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: all 0.3s;
}

/* Mobile Nav */
.nav--mobile {
  display: none;
  position: absolute;
  top: var(--header-h);
  left: 0; right: 0;
  background: var(--surface);
  box-shadow: var(--shadow-md);
  padding: 16px 20px;
  z-index: 999;
}
.nav--mobile.open { display: block; }
.nav--mobile .nav__list {
  flex-direction: column;
  align-items: stretch;
  gap: 4px;
}
.nav--mobile .nav__list a {
  padding: 12px 16px;
  border-radius: 8px;
}
.nav--mobile .nav__cta { margin-left: 0; margin-top: 8px; }
.nav--mobile .btn { width: 100%; justify-content: center; }

/* --- Hero Section --- */
.hero {
  position: relative;
  min-height: clamp(500px, 85vh, 760px);
  display: flex;
  align-items: center;
  background: var(--dark-surface);
  overflow: hidden;
}
.hero__bg {
  position: absolute;
  inset: 0;
  background-image: url('../assets/hero.jpg');
  background-size: cover;
  background-position: center top;
  opacity: 0.38;
}
.hero__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(13,30,45,0.92) 0%, rgba(13,30,45,0.65) 100%);
}
.hero__content {
  position: relative;
  z-index: 2;
  max-width: 680px;
}
.hero__headline {
  color: #fff;
  margin-bottom: 20px;
  line-height: 1.15;
}
.hero__headline .accent-word { color: var(--primary); }
.hero__sub {
  font-size: clamp(1rem, 2vw, 1.15rem);
  color: rgba(255,255,255,0.85);
  margin-bottom: 32px;
  max-width: 560px;
  line-height: 1.65;
}
.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 36px;
}
.hero__trust {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.trust-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(255,255,255,0.10);
  border: 1px solid rgba(255,255,255,0.18);
  color: rgba(255,255,255,0.90);
  font-size: 0.78rem;
  font-weight: 600;
  padding: 6px 14px;
  border-radius: 50px;
  backdrop-filter: blur(6px);
}
.trust-chip .dot {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--primary);
  flex-shrink: 0;
}

/* --- Services Strip / Quick Facts --- */
.services-strip {
  background: var(--primary);
  color: #fff;
  padding: 20px 0;
}
.services-strip__inner {
  display: flex;
  align-items: center;
  justify-content: space-around;
  gap: 20px;
  flex-wrap: wrap;
}
.strip-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.88rem;
  font-weight: 600;
}
.strip-item i { font-size: 1.1rem; }

/* --- Section Header --- */
.section-header {
  margin-bottom: 52px;
}
.section-header h2 { margin-bottom: 12px; }
.section-header p {
  font-size: 1.05rem;
  color: var(--muted);
  max-width: 620px;
}
.section-header--center { text-align: center; }
.section-header--center p { margin: 0 auto; }

/* --- Service Cards --- */
.service-card {
  background: var(--surface);
  border-radius: var(--radius);
  padding: 32px 28px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--line);
  transition: all 0.25s ease;
  position: relative;
  overflow: hidden;
}
.service-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 4px; height: 100%;
  background: linear-gradient(180deg, var(--primary) 0%, var(--primary-dark) 100%);
  border-radius: 4px 0 0 4px;
}
.service-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary);
}
.service-card__icon {
  width: 52px; height: 52px;
  border-radius: 14px;
  background: var(--primary-light);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  font-size: 1.4rem;
  color: var(--primary);
}
.service-card h3 { margin-bottom: 10px; }
.service-card p { color: var(--muted); font-size: 0.93rem; line-height: 1.6; }
.service-card__list {
  margin-top: 16px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.service-card__list li {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  font-size: 0.88rem;
  color: var(--muted);
}
.service-card__list li::before {
  content: '✓';
  color: var(--primary);
  font-weight: 700;
  flex-shrink: 0;
  margin-top: 1px;
}

/* --- Feature Split Section --- */
.feature-split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}
.feature-split--reverse .feature-split__img { order: 2; }
.feature-split--reverse .feature-split__content { order: 1; }
.feature-split__img img {
  border-radius: var(--radius-lg);
  width: 100%;
  height: 400px;
  object-fit: cover;
  box-shadow: var(--shadow-lg);
}
.feature-split__content h2 { margin-bottom: 16px; }
.feature-split__content p { color: var(--muted); line-height: 1.7; margin-bottom: 24px; }
.feature-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-bottom: 28px;
}
.feature-list li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 0.93rem;
}
.feature-list li i {
  color: var(--primary);
  font-size: 1.1rem;
  margin-top: 2px;
  flex-shrink: 0;
}

/* --- Process Steps --- */
.process-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  counter-reset: step;
}
.process-step {
  text-align: center;
  padding: 32px 20px;
  background: var(--surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--line);
  position: relative;
}
.process-step__num {
  width: 52px; height: 52px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: #fff;
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 1.3rem;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
}
.process-step h4 { margin-bottom: 8px; }
.process-step p { color: var(--muted); font-size: 0.88rem; line-height: 1.55; }

/* --- Photo Gallery --- */
.photo-gallery {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
.photo-gallery img {
  width: 100%;
  height: 240px;
  object-fit: cover;
  border-radius: var(--radius);
  transition: transform 0.25s ease;
}
.photo-gallery img:hover { transform: scale(1.03); }

/* --- FAQ --- */
.faq { display: flex; flex-direction: column; gap: 12px; }
.faq-item {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  overflow: hidden;
}
.faq-item__q {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 22px;
  font-family: var(--font-heading);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text);
  text-align: left;
  transition: color 0.18s;
}
.faq-item__q:hover { color: var(--primary); }
.faq-item__q i { flex-shrink: 0; transition: transform 0.25s; color: var(--primary); }
.faq-item.open .faq-item__q i { transform: rotate(180deg); }
.faq-item__a {
  display: none;
  padding: 0 22px 18px;
  color: var(--muted);
  font-size: 0.92rem;
  line-height: 1.65;
}
.faq-item.open .faq-item__a { display: block; }

/* --- CTA Banner --- */
.cta-banner {
  background: linear-gradient(135deg, var(--dark-surface) 0%, #1a3a52 100%);
  padding: 60px 0;
  color: #fff;
  text-align: center;
}
.cta-banner h2 { margin-bottom: 12px; }
.cta-banner p { color: rgba(255,255,255,0.78); margin-bottom: 32px; max-width: 560px; margin-left: auto; margin-right: auto; }
.cta-banner__actions { display: flex; flex-wrap: wrap; gap: 14px; justify-content: center; }
.cta-banner__contact {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 24px;
  margin-top: 24px;
  flex-wrap: wrap;
}
.cta-banner__contact a {
  display: flex;
  align-items: center;
  gap: 8px;
  color: rgba(255,255,255,0.85);
  font-size: 0.95rem;
  font-weight: 600;
  transition: color 0.18s;
}
.cta-banner__contact a:hover { color: var(--primary); }
.cta-banner__contact i { color: var(--primary); }

/* --- ASTM / Compliance Badges --- */
.compliance-bar {
  background: var(--primary-light);
  border-top: 2px solid var(--primary);
  border-bottom: 2px solid var(--primary);
  padding: 18px 0;
}
.compliance-bar__inner {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 32px;
  flex-wrap: wrap;
}
.compliance-badge {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--primary-dark);
}
.compliance-badge i { font-size: 1.2rem; }

/* --- Contact Form --- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 380px;
  gap: 48px;
  align-items: start;
}
.contact-form {
  background: var(--surface);
  border-radius: var(--radius-lg);
  padding: 40px;
  box-shadow: var(--shadow-md);
}
.form-group { margin-bottom: 20px; }
.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 6px;
  color: var(--text);
}
.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 12px 16px;
  border: 1.5px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--bg);
  color: var(--text);
  font-size: 0.93rem;
  transition: border-color 0.18s, box-shadow 0.18s;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37,183,195,0.15);
}
.form-group textarea { resize: vertical; min-height: 110px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-success {
  display: none;
  text-align: center;
  padding: 32px;
  color: var(--primary-dark);
}
.form-success i { font-size: 2.5rem; color: var(--primary); margin-bottom: 12px; }
.form-success h3 { margin-bottom: 8px; }

.contact-sidebar { display: flex; flex-direction: column; gap: 20px; }
.contact-card {
  background: var(--surface);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--line);
}
.contact-card h4 { margin-bottom: 16px; color: var(--text); }
.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 10px 0;
  border-bottom: 1px solid var(--line);
}
.contact-item:last-child { border-bottom: none; }
.contact-item i { color: var(--primary); font-size: 1.1rem; margin-top: 2px; flex-shrink: 0; }
.contact-item__label { font-size: 0.78rem; color: var(--muted); margin-bottom: 2px; }
.contact-item__val { font-weight: 600; font-size: 0.95rem; }
.contact-item__val a { color: var(--text); transition: color 0.18s; }
.contact-item__val a:hover { color: var(--primary); }

.service-area-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 8px;
}
.area-chip {
  background: var(--primary-light);
  color: var(--primary-dark);
  font-size: 0.78rem;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: 50px;
}

/* --- About Page --- */
.about-hero {
  background: var(--dark-surface);
  padding: 100px 0 80px;
  color: #fff;
}
.about-intro { display: grid; grid-template-columns: 1fr 420px; gap: 60px; align-items: center; }
.about-intro__img {
  border-radius: var(--radius-lg);
  width: 100%;
  height: 380px;
  object-fit: cover;
  box-shadow: var(--shadow-lg);
  order: 2;
}
.value-card {
  background: var(--surface);
  border-radius: var(--radius);
  padding: 28px 24px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--line);
  text-align: center;
  transition: transform 0.25s, box-shadow 0.25s;
}
.value-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.value-card__icon {
  width: 56px; height: 56px;
  background: var(--primary-light);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
  font-size: 1.5rem;
  color: var(--primary);
}
.value-card h4 { margin-bottom: 8px; }
.value-card p { color: var(--muted); font-size: 0.88rem; line-height: 1.55; }

/* --- Page Hero (inner pages) --- */
.page-hero {
  background: linear-gradient(135deg, var(--dark-surface) 0%, #1a3a52 100%);
  padding: 70px 0 60px;
  color: #fff;
}
.page-hero h1 { margin-bottom: 12px; }
.page-hero p { color: rgba(255,255,255,0.78); font-size: 1.05rem; max-width: 560px; }
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 16px;
  font-size: 0.82rem;
  color: rgba(255,255,255,0.6);
}
.breadcrumb a { color: var(--primary); }
.breadcrumb i { font-size: 0.7rem; }

/* --- Footer --- */
.site-footer {
  background: var(--darker-surface);
  color: rgba(255,255,255,0.75);
  padding: 60px 0 0;
}
.footer__grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 40px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.footer__brand img { height: 44px; margin-bottom: 16px; filter: brightness(1.2); }
.footer__brand p { font-size: 0.88rem; line-height: 1.7; color: rgba(255,255,255,0.6); max-width: 280px; }
.footer__col h5 {
  font-family: var(--font-heading);
  font-size: 0.85rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 16px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}
.footer__col ul { display: flex; flex-direction: column; gap: 10px; }
.footer__col ul li a {
  font-size: 0.88rem;
  color: rgba(255,255,255,0.6);
  transition: color 0.18s;
}
.footer__col ul li a:hover { color: var(--primary); }
.footer__contact-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin-bottom: 12px;
  font-size: 0.88rem;
  color: rgba(255,255,255,0.65);
}
.footer__contact-item i { color: var(--primary); margin-top: 2px; flex-shrink: 0; }
.footer__contact-item a { color: rgba(255,255,255,0.65); transition: color 0.18s; }
.footer__contact-item a:hover { color: var(--primary); }
.footer__bottom {
  padding: 20px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 0.80rem;
  color: rgba(255,255,255,0.40);
}
.footer__bottom a { color: rgba(255,255,255,0.5); transition: color 0.18s; }
.footer__bottom a:hover { color: var(--primary); }

/* --- Mobile CTA Bar (fixed bottom) --- */
.mobile-cta-bar {
  display: none;
  position: fixed;
  bottom: 0; left: 0; right: 0;
  background: var(--dark-surface);
  padding: 12px 16px;
  z-index: 900;
  border-top: 2px solid var(--primary);
  box-shadow: 0 -4px 20px rgba(0,0,0,0.3);
}
.mobile-cta-bar__inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}
.mobile-cta-bar__btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 16px;
  border-radius: 10px;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 0.85rem;
  color: #fff;
  transition: opacity 0.18s;
}
.mobile-cta-bar__btn--call { background: var(--accent); }
.mobile-cta-bar__btn--email { background: var(--primary); }
.mobile-cta-bar__btn:hover { opacity: 0.88; }

/* --- Scroll Reveal --- */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ===== RESPONSIVE ===== */

/* Tablet ≤ 980px */
@media (max-width: 980px) {
  .grid-2 { grid-template-columns: 1fr; }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .process-steps { grid-template-columns: repeat(2, 1fr); }
  .feature-split { grid-template-columns: 1fr; gap: 36px; }
  .feature-split--reverse .feature-split__img { order: 0; }
  .feature-split--reverse .feature-split__content { order: 0; }
  .contact-grid { grid-template-columns: 1fr; }
  .contact-sidebar { order: -1; }
  .footer__grid { grid-template-columns: 1fr 1fr; }
  .about-intro { grid-template-columns: 1fr; }
  .about-intro__img { order: 0; height: 280px; }
  .photo-gallery { grid-template-columns: repeat(2, 1fr); }
  .topbar { display: none; }
  .mobile-cta-bar { display: block; }
  body { padding-bottom: 72px; }
}

/* Mobile ≤ 640px */
@media (max-width: 640px) {
  :root { --header-h: 64px; }
  .container { padding: 0 16px; }
  .section { padding: 60px 0; }
  .section-lg { padding: 70px 0; }
  .grid-3 { grid-template-columns: 1fr; }
  .grid-4 { grid-template-columns: 1fr; }
  .process-steps { grid-template-columns: 1fr; }
  .photo-gallery { grid-template-columns: 1fr; }
  .hero { min-height: 580px; }
  .hero__actions { flex-direction: column; }
  .hero__actions .btn { width: 100%; }
  .footer__grid { grid-template-columns: 1fr; }
  .brand img { height: 40px; }
  .form-row { grid-template-columns: 1fr; }
  .compliance-bar__inner { flex-direction: column; gap: 14px; text-align: center; }
  .services-strip__inner { flex-direction: column; gap: 12px; }
  .cta-banner__actions { flex-direction: column; align-items: stretch; }
  .cta-banner__actions .btn { width: 100%; justify-content: center; }
  .contact-form { padding: 28px 20px; }
  .nav { display: none; }
  .nav__toggle { display: flex; }
}

/* Nav toggle for mobile show/hide */
@media (min-width: 641px) {
  .nav__toggle { display: none; }
  .nav--mobile { display: none !important; }
}