/* ============================================================
   ORION INFRALABS — MAIN STYLESHEET
   Industrial / Civil-Engineering theme
   Palette: Deep Navy (#0f1b2d), Steel Blue (#1a3a5c), Accent Gold (#e8a838), White, Grey
   ============================================================ */

/* ---------- CSS RESET & VARIABLES ---------- */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  /* Primary */
  --navy:        #0f1b2d;
  --navy-mid:    #152438;
  --steel:       #1a3a5c;
  --steel-light: #254e7a;
  --blue-text:   #3d7ab5;
  /* Accent */
  --gold:        #e8a838;
  --gold-light:  #f0c06a;
  /* Neutral */
  --white:       #ffffff;
  --off-white:   #f4f6f9;
  --grey-100:    #eef1f5;
  --grey-200:    #d4dbe5;
  --grey-400:    #8a9bb0;
  --grey-600:    #5a6a7d;
  --grey-800:    #2e3d50;
  /* UI */
  --red:         #e04848;
  --green:       #2ecc71;
  /* Typography */
  --font-head:   'Oswald', sans-serif;
  --font-body:   'Source Sans 3', sans-serif;
  /* Spacing */
  --section-py:  100px;
  --container:   1200px;
  /* Transition */
  --ease:        cubic-bezier(.22,.61,0,1);
  --trans:       .35s var(--ease);
}

/* ---------- BASE ---------- */
html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-body);
  color: var(--grey-800);
  background: var(--white);
  line-height: 1.65;
  overflow-x: hidden;
}

img { max-width: 100%; display: block; }

a {
  color: inherit;
  text-decoration: none;
}

ul { list-style: none; }

/* ---------- CONTAINER ---------- */
.container {
  width: 90%;
  max-width: var(--container);
  margin-inline: auto;
}

/* ============================================================
   NAVIGATION
   ============================================================ */
.navbar {
  position: fixed;
  inset-inline: 0;
  top: 0;
  z-index: 999;
  padding: 18px 0;
  transition: background var(--trans), padding var(--trans), box-shadow var(--trans);
}

.navbar.scrolled {
  background: rgba(15, 27, 45, .95);
  backdrop-filter: blur(8px);
  padding: 10px 0;
  box-shadow: 0 2px 20px rgba(0,0,0,.25);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 90%;
  max-width: var(--container);
  margin-inline: auto;
}

/* Logo */
.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
}

.nav-logo .logo-icon {
  color: var(--gold);
  font-size: 22px;
}

.nav-logo .logo-text {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 20px;
  color: var(--white);
  letter-spacing: 2px;
  line-height: 1;
}

.nav-logo .logo-sub {
  display: block;
  font-size: 10px;
  font-weight: 400;
  letter-spacing: 4px;
  color: var(--grey-400);
  margin-top: 1px;
}

/* Nav Links */
.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav-links a {
  font-size: .9rem;
  font-weight: 600;
  color: rgba(255,255,255,.75);
  letter-spacing: .6px;
  position: relative;
  padding-bottom: 4px;
  transition: color var(--trans);
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0;
  width: 0; height: 2px;
  background: var(--gold);
  transition: width var(--trans);
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--white);
}

.nav-links a:hover::after,
.nav-links a.active::after {
  width: 100%;
}

/* CTA nav link */
.nav-links .nav-cta {
  background: var(--gold);
  color: var(--navy);
  padding: 8px 20px;
  border-radius: 4px;
  font-weight: 700;
}

.nav-links .nav-cta::after { display: none; }

.nav-links .nav-cta:hover {
  background: var(--gold-light);
}

/* Logo image */
.nav-logo-img {
  height: 48px;
  width: auto;
  display: block;
  object-fit: contain;
}

.navbar.scrolled .nav-logo-img {
  height: 38px;
}

/* Services Dropdown */
.nav-dropdown {
  position: relative;
}

.nav-dropdown-toggle {
  display: flex;
  align-items: center;
  gap: 5px;
  cursor: pointer;
}

.nav-arrow {
  font-size: .65rem;
  transition: transform var(--trans);
}

.nav-dropdown:hover .nav-arrow,
.nav-dropdown.open .nav-arrow {
  transform: rotate(180deg);
}

.nav-submenu {
  position: absolute;
  top: calc(100% + 14px);
  left: 50%;
  transform: translateX(-50%);
  background: rgba(15, 27, 45, .97);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255,255,255,.1);
  border-radius: 10px;
  padding: 8px 0;
  min-width: 210px;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--trans), transform .3s var(--ease);
  transform: translateX(-50%) translateY(8px);
  z-index: 1000;
  box-shadow: 0 12px 32px rgba(0,0,0,.4);
}

.nav-submenu::before {
  content: '';
  position: absolute;
  top: -7px;
  left: 50%;
  transform: translateX(-50%);
  border-left: 7px solid transparent;
  border-right: 7px solid transparent;
  border-bottom: 7px solid rgba(255,255,255,.1);
}

.nav-dropdown:hover .nav-submenu,
.nav-dropdown.open .nav-submenu {
  opacity: 1;
  pointer-events: auto;
  transform: translateX(-50%) translateY(0);
}

.nav-submenu li a {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 20px;
  font-size: .85rem;
  color: rgba(255,255,255,.75);
  transition: background var(--trans), color var(--trans), padding-left var(--trans);
}

.nav-submenu li a::after { display: none; }

.nav-submenu li a i {
  color: var(--gold);
  width: 16px;
  text-align: center;
  font-size: .8rem;
}

.nav-submenu li a:hover {
  background: rgba(232,168,56,.1);
  color: var(--gold);
  padding-left: 26px;
}


.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
}

.ham-line {
  display: block;
  width: 26px; height: 2px;
  background: var(--white);
  border-radius: 2px;
  transition: transform .3s, opacity .3s;
}

.hamburger.active .ham-line:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.active .ham-line:nth-child(2) { opacity: 0; }
.hamburger.active .ham-line:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ============================================================
   HERO
   ============================================================ */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--navy) 0%, var(--steel) 60%, #0d2a4a 100%);
  padding: 120px 5% 60px;
  overflow: hidden;
}

/* Grid overlay */
.hero-grid-overlay {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.04) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
}

/* Accent bars */
.hero-accent-bar {
  position: absolute;
  background: var(--gold);
  opacity: .15;
  border-radius: 100px;
}

.hero-accent-1 {
  width: 600px; height: 600px;
  top: -200px; right: -150px;
  filter: blur(120px);
}

.hero-accent-2 {
  width: 300px; height: 300px;
  bottom: -80px; left: -100px;
  filter: blur(90px);
  opacity: .08;
}

/* Content */
.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 800px;
}

.hero-label {
  display: inline-block;
  font-size: .82rem;
  font-weight: 600;
  letter-spacing: 2.5px;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 20px;
}

.hero-title {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(2.6rem, 6vw, 4.2rem);
  color: var(--white);
  line-height: 1.15;
  margin-bottom: 22px;
  letter-spacing: 1px;
}

.hero-highlight {
  color: var(--gold);
}

.hero-desc {
  font-size: 1.05rem;
  color: rgba(255,255,255,.7);
  max-width: 600px;
  margin-inline: auto;
  margin-bottom: 36px;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: .93rem;
  padding: 14px 30px;
  border-radius: 5px;
  border: none;
  cursor: pointer;
  transition: transform var(--trans), box-shadow var(--trans), background var(--trans);
  text-decoration: none;
  letter-spacing: .4px;
}

.btn:hover {
  transform: translateY(-2px);
}

.btn-primary {
  background: var(--gold);
  color: var(--navy);
  box-shadow: 0 4px 18px rgba(232,168,56,.35);
}

.btn-primary:hover {
  background: var(--gold-light);
  box-shadow: 0 6px 24px rgba(232,168,56,.45);
}

.btn-ghost {
  background: transparent;
  color: var(--white);
  border: 2px solid rgba(255,255,255,.3);
}

.btn-ghost:hover {
  border-color: var(--gold);
  color: var(--gold);
}

.hero-buttons {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

/* Hero Stats Strip */
.hero-stats {
  position: relative;
  z-index: 2;
  display: flex;
  gap: 0;
  margin-top: 70px;
  align-items: center;
}

.stat-item {
  text-align: center;
  padding: 0 36px;
}

.stat-number {
  display: block;
  font-family: var(--font-head);
  font-size: 2rem;
  font-weight: 700;
  color: var(--gold);
}

.stat-label {
  font-size: .78rem;
  color: rgba(255,255,255,.55);
  text-transform: uppercase;
  letter-spacing: 1.2px;
}

.stat-divider {
  width: 1px; height: 42px;
  background: rgba(255,255,255,.15);
}

/* ============================================================
   SECTION COMMONS
   ============================================================ */
.section {
  padding: var(--section-py) 0;
}


.section-light { background: var(--White);}
.section-dark  { background: var(--navy); }

/* Section header block */
.section-header {
  text-align: center;
  margin-bottom: 60px;
}

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: .78rem;
  font-weight: 600;
  letter-spacing: 2.5px;
  text-transform: uppercase;
  color: var(--steel);
}

.section-tag.light { color: var(--grey-400); }

.section-title {
  font-family: var(--font-head);
  font-size: clamp(1.9rem, 4vw, 2.8rem);
  font-weight: 700;
  color: var(--navy);
  line-height: 1.2;
  margin: 12px 0 16px;
}

.section-title.light { color: var(--white); }


.section-title .highlight { color: var(--gold); }

.section-sub {
  max-width: 580px;
  margin-inline: auto;
  color: var(--grey-600);
  font-size: .96rem;
}

.section-dark .section-sub { color: var(--grey-400); }

/* ============================================================
   ABOUT US
   ============================================================ */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 70px;
  align-items: center;
  
}

/* Visual side */
.about-visual {
  position: relative;
}

.about-img-box {
  position: relative;
  border-radius: 12px;
  overflow: hidden;
  background: linear-gradient(135deg, var(--steel) 0%, var(--navy) 100%);
  aspect-ratio: 4/5;
  display: flex;
  align-items: center;
  justify-content: center;
}

.about-img-placeholder {
  font-size: 100px;
  color: rgba(255,255,255,.08);
}

/* Decorative border offset */
.about-img-box::before {
  content: '';
  position: absolute;
  inset: 12px;
  border: 2px solid var(--gold);
  border-radius: 12px;
  opacity: .35;
  pointer-events: none;
}

.about-badge {
  position: absolute;
  bottom: -20px; right: -20px;
  background: var(--gold);
  color: var(--navy);
  border-radius: 10px;
  padding: 18px 22px;
  display: flex;
  align-items: center;
  gap: 12px;
  box-shadow: 0 8px 30px rgba(0,0,0,.15);
}

.about-badge i {
  font-size: 26px;
}

.about-badge span {
  font-family: var(--font-head);
  font-weight: 600;
  font-size: .82rem;
  line-height: 1.3;
  letter-spacing: .4px;
}

/* Content side */
.about-text {
  color: var(--grey-600);
  margin-bottom: 18px;
  font-size: .97rem;
}

.about-pillars {
  display: flex;
  gap: 24px;
  margin-top: 32px;
}

.pillar {
  display: flex;
  gap: 12px;
  flex: 1;
  align-items: flex-start;
}

.pillar i {
  color: var(--gold);
  font-size: 20px;
  margin-top: 2px;
  flex-shrink: 0;
}

.pillar strong {
  display: block;
  color: var(--navy);
  font-size: .9rem;
  margin-bottom: 3px;
}

.pillar p {
  font-size: .78rem;
  color: var(--grey-600);
  margin: 0;
}

/* ============================================================
   CORE SERVICES (MATERIAL TESTING)
   ============================================================ */
.services-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 36px;
}

.service-card {
  background: rgba(255,255,255,.04);
  border: 1px solid rgba(255,255,255,.08);
  border-radius: 14px;
  overflow: hidden;
  transition: transform var(--trans), border-color var(--trans);
}

.service-card:hover {
  transform: translateY(-4px);
  border-color: var(--gold);
}

/* Card header */
.service-card-header {
  padding: 36px 32px 20px;
  border-bottom: 1px solid rgba(255,255,255,.07);
}

.service-icon-wrap {
  width: 52px; height: 52px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--gold), var(--gold-light));
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--navy);
  font-size: 22px;
  margin-bottom: 18px;
}

.service-card-header h3 {
  font-family: var(--font-head);
  color: var(--white);
  font-size: 1.35rem;
  letter-spacing: .5px;
}

.service-card-sub {
  font-size: .78rem;
  color: var(--grey-400);
  text-transform: uppercase;
  letter-spacing: 1.2px;
  margin-top: 4px;
}

/* Service list */
.service-list {
  padding: 20px 32px;
}

.service-list li {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 7px 0;
  border-bottom: 1px solid rgba(255,255,255,.05);
  color: rgba(255,255,255,.72);
  font-size: .9rem;
  transition: color var(--trans), padding-left var(--trans);
}

.service-list li:last-child { border-bottom: none; }

.service-list li i {
  color: var(--gold);
  font-size: 10px;
  flex-shrink: 0;
}

.service-list li:hover {
  color: var(--white);
  padding-left: 6px;
}

/* Products sub-section */
.service-products {
  border-top: 1px solid rgba(255,255,255,.1);
  margin-top: 4px;
}

.service-products h4 {
  color: var(--gold);
  font-family: var(--font-head);
  font-size: .88rem;
  letter-spacing: 1px;
  text-transform: uppercase;
  padding: 16px 32px 4px;
  display: flex;
  align-items: center;
  gap: 8px;
}

/* ============================================================
   NDT CAPABILITIES
   ============================================================ */
.ndt-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.ndt-card {
  background: var(--off-white);
  border: 1px solid var(--grey-100);
  border-radius: 12px;
  padding: 32px 24px;
  text-align: center;
  transition: transform var(--trans), box-shadow var(--trans), border-color var(--trans);
  position: relative;
  overflow: hidden;
}

/* Top accent line */
.ndt-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: var(--gold);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--trans);
}

.ndt-card:hover::before { transform: scaleX(1); }

.ndt-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 12px 36px rgba(26,58,92,.12);
  border-color: var(--gold);
}

.ndt-icon {
  width: 60px; height: 60px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--steel-light), var(--steel));
  color: var(--white);
  font-size: 22px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-inline: auto;
  margin-bottom: 18px;
}

.ndt-card h4 {
  font-family: var(--font-head);
  color: var(--navy);
  font-size: .95rem;
  margin-bottom: 8px;
  letter-spacing: .3px;
}

.ndt-card p {
  font-size: .8rem;
  color: var(--grey-600);
  line-height: 1.5;
}

/* ============================================================
   SPECIALIZED SERVICES
   ============================================================ */
.spec-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.spec-card {
  position: relative;
  background: rgba(255,255,255,.04);
  border: 1px solid rgba(255,255,255,.07);
  border-radius: 14px;
  padding: 30px 22px 26px;
  text-align: center;
  transition: transform var(--trans), border-color var(--trans), background var(--trans);
}

.spec-card:hover {
  transform: translateY(-4px);
  border-color: var(--gold);
  background: rgba(255,255,255,.07);
}

.spec-number {
  position: absolute;
  top: 16px; right: 18px;
  font-family: var(--font-head);
  font-size: .75rem;
  font-weight: 700;
  color: rgba(255,255,255,.12);
  letter-spacing: 1px;
}

.spec-icon {
  width: 56px; height: 56px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--gold), var(--gold-light));
  color: var(--navy);
  font-size: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-inline: auto;
  margin-bottom: 16px;
}

.spec-card h4 {
  font-family: var(--font-head);
  color: var(--white);
  font-size: .92rem;
  margin-bottom: 8px;
  letter-spacing: .3px;
}

.spec-card p {
  font-size: .78rem;
  color: var(--grey-400);
  line-height: 1.5;
}

/* ============================================================
   CLIENTS
   ============================================================ */
   .clients-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 28px;
  max-width: 900px;
  margin-inline: auto;
}

.client-logo-card {
  background: var(--off-white);
  border: 1px solid var(--grey-100);
  border-radius: 12px;
  padding: 40px 20px;
  transition: transform var(--trans), box-shadow var(--trans), border-color var(--trans);
}

.client-logo-card:hover {
  transform: translateY(-4px);
  border-color: var(--gold);
  box-shadow: 0 8px 28px rgba(26,58,92,.1);
  color: var(--gold);
}

.client-logo-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}

.client-logo-inner i {
  font-size: 28px;
  color: var(--steel);
}

.client-logo-inner span {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 1rem;
  color: var(--navy);
  letter-spacing: 2px;
}
/* ============================================================
   CONTACT
   ============================================================ */
.contact-grid {
  display: grid;
  grid-template-columns: .85fr 1.15fr;
  gap: 60px;
}

/* --- Info cards --- */
.contact-info {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.contact-info-card {
  display: flex;
  gap: 18px;
  align-items: flex-start;
}

.contact-info-icon {
  width: 48px; height: 48px;
  border-radius: 10px;
  background: rgba(255,255,255,.06);
  border: 1px solid rgba(255,255,255,.1);
  color: var(--gold);
  font-size: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.contact-info-card h5 {
  font-family: var(--font-head);
  color: var(--white);
  font-size: .88rem;
  letter-spacing: .6px;
  margin-bottom: 4px;
}

.contact-info-card p {
  font-size: .82rem;
  color: var(--grey-400);
  line-height: 1.6;
  margin: 0;
}

/* --- Form --- */
.contact-form-wrap {
  position: relative;
}

.contact-form {
  background: rgba(255,255,255,.04);
  border: 1px solid rgba(255,255,255,.08);
  border-radius: 16px;
  padding: 40px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 22px;
}

.form-group {
  display: flex;
  flex-direction: column;
}

.form-group-full {
  grid-column: 1 / -1;
}

.form-group label {
  font-size: .82rem;
  font-weight: 600;
  color: rgba(255,255,255,.7);
  margin-bottom: 7px;
  letter-spacing: .4px;
}

.form-group label .req { color: var(--gold); }

.form-group input,
.form-group select,
.form-group textarea {
  background: rgba(255,255,255,.06);
  border: 1px solid rgba(255,255,255,.12);
  border-radius: 8px;
  padding: 12px 16px;
  color: var(--white);
  font-family: var(--font-body);
  font-size: .9rem;
  transition: border-color var(--trans), box-shadow var(--trans);
  outline: none;
  margin-bottom: 4px;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: rgba(255,255,255,.3);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--gold);
  box-shadow: 0 0 0 3px rgba(232,168,56,.15);
}

/* Select fix for dark bg */
.form-group select {
  appearance: none;
  -webkit-appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23e8a838' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  padding-right: 38px;
}

.form-group select option {
  background: var(--navy-mid);
  color: var(--white);
}

.form-group textarea {
  resize: vertical;
  min-height: 110px;
}

/* Error messages */
.error-msg {
  font-size: .75rem;
  color: var(--red);
  min-height: 18px;
  display: block;
}

/* Submit btn */
.btn-submit {
  width: 100%;
  justify-content: center;
  margin-top: 10px;
  padding: 15px;
  font-size: 1rem;
}

/* Success banner */
.success-banner {
  display: none;
  align-items: center;
  gap: 18px;
  background: rgba(46,204,113,.12);
  border: 1px solid rgba(46,204,113,.3);
  border-radius: 12px;
  padding: 22px 26px;
  margin-top: 18px;
}

.success-banner.show { display: flex; }

.success-banner i {
  font-size: 30px;
  color: var(--green);
  flex-shrink: 0;
}

.success-banner strong {
  color: var(--white);
  font-size: .95rem;
}

.success-banner p {
  color: var(--grey-400);
  font-size: .82rem;
  margin: 3px 0 0;
}

/* ============================================================
   FOOTER
   ============================================================ */
.footer {
  background: #0a1520;
  padding: 70px 0 0;
  color: var(--grey-400);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1.2fr;
  gap: 48px;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
}

.footer-brand p {
  font-size: .82rem;
  line-height: 1.7;
  margin-bottom: 20px;
}

.footer-socials {
  display: flex;
  gap: 12px;
}

.footer-socials a {
  width: 36px; height: 36px;
  border-radius: 8px;
  border: 1px solid rgba(255,255,255,.12);
  color: var(--grey-400);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  transition: background var(--trans), color var(--trans), border-color var(--trans);
}

.footer-socials a:hover {
  background: var(--gold);
  color: var(--navy);
  border-color: var(--gold);
}

/* Footer columns */
.footer-col h5 {
  font-family: var(--font-head);
  color: var(--white);
  font-size: .88rem;
  letter-spacing: 1px;
  text-transform: uppercase;
  margin-bottom: 18px;
}

.footer-col ul li {
  margin-bottom: 10px;
}

.footer-col ul a {
  font-size: .82rem;
  color: var(--grey-400);
  transition: color var(--trans), padding-left var(--trans);
  display: inline-block;
}

.footer-col ul a:hover {
  color: var(--gold);
  padding-left: 4px;
}

/* Contact list in footer */
.footer-contact-list li {
  display: flex;
  gap: 10px;
  font-size: .82rem;
  align-items: flex-start;
  margin-bottom: 10px;
}

.footer-contact-list li i {
  color: var(--gold);
  margin-top: 2px;
  flex-shrink: 0;
}

/* Footer bottom */
.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 28px 0;
  margin-top: 52px;
  border-top: 1px solid rgba(255,255,255,.07);
  font-size: .78rem;
  color: var(--grey-600);
}

.footer-bottom i { color: var(--red); }

/* ============================================================
   BACK TO TOP
   ============================================================ */
.back-to-top {
  position: fixed;
  bottom: 36px; right: 36px;
  z-index: 900;
  width: 46px; height: 46px;
  border-radius: 10px;
  background: var(--steel);
  border: 2px solid var(--gold);
  color: var(--gold);
  font-size: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  opacity: 0;
  transform: translateY(20px);
  transition: opacity var(--trans), transform var(--trans), background var(--trans);
  pointer-events: none;
}

.back-to-top.show {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

.back-to-top:hover {
  background: var(--gold);
  color: var(--navy);
}

/* ============================================================
   SCROLL REVEAL ANIMATIONS
   ============================================================ */
.reveal-up,
.reveal-left,
.reveal-right {
  opacity: 0;
  transition: opacity .7s var(--ease), transform .7s var(--ease);
}

.reveal-up            { transform: translateY(40px); }
.reveal-left          { transform: translateX(-50px); }
.reveal-right         { transform: translateX(50px); }

.reveal-up.visible,
.reveal-left.visible,
.reveal-right.visible {
  opacity: 1;
  transform: translate(0);
}

/* staggered delays for grid children */
.ndt-grid .ndt-card:nth-child(2)  { transition-delay: .08s; }
.ndt-grid .ndt-card:nth-child(3)  { transition-delay: .16s; }
.ndt-grid .ndt-card:nth-child(4)  { transition-delay: .24s; }
.ndt-grid .ndt-card:nth-child(5)  { transition-delay: .32s; }
.ndt-grid .ndt-card:nth-child(6)  { transition-delay: .40s; }
.ndt-grid .ndt-card:nth-child(7)  { transition-delay: .48s; }
.ndt-grid .ndt-card:nth-child(8)  { transition-delay: .56s; }

.spec-grid .spec-card:nth-child(2) { transition-delay: .07s; }
.spec-grid .spec-card:nth-child(3) { transition-delay: .14s; }
.spec-grid .spec-card:nth-child(4) { transition-delay: .21s; }
.spec-grid .spec-card:nth-child(5) { transition-delay: .28s; }
.spec-grid .spec-card:nth-child(6) { transition-delay: .35s; }
.spec-grid .spec-card:nth-child(7) { transition-delay: .42s; }
.spec-grid .spec-card:nth-child(8) { transition-delay: .49s; }

/* ============================================================
   RESPONSIVE — TABLET (≤ 1024 px)
   ============================================================ */
@media (max-width: 1024px) {
  .ndt-grid       { grid-template-columns: repeat(2, 1fr); }
  .spec-grid      { grid-template-columns: repeat(2, 1fr); }
  .about-grid     { grid-template-columns: 1fr; gap: 40px; }
  .about-visual   { max-width: 420px; margin-inline: auto; }
  .footer-grid    { grid-template-columns: 1fr 1fr; }
  .clients-grid   { grid-template-columns: repeat(3, 1fr); }
}

/* ============================================================
   RESPONSIVE — MOBILE (≤ 768 px)
   ============================================================ */
@media (max-width: 768px) {
  :root { --section-py: 70px; }

  /* Nav */
  .hamburger { display: flex; }

  .nav-links {
    position: fixed;
    inset: 0;
    top: 0;
    background: var(--navy);
    flex-direction: column;
    justify-content: center;
    gap: 10px;
    opacity: 0;
    pointer-events: none;
    transition: opacity .4s;
    z-index: 998;
  }

  .nav-links.open {
    opacity: 1;
    pointer-events: auto;
  }

  .nav-links a {
    font-size: 1.15rem;
    padding: 10px 0;
  }

  .nav-links .nav-cta {
    padding: 12px 28px;
    margin-top: 8px;
  }

  /* Hero */
  .hero { padding-top: 100px; }
  .hero-stats {
    flex-wrap: wrap;
    justify-content: center;
    gap: 18px;
  }
  .stat-divider { display: none; }
  .stat-item    { padding: 0 20px; }

  /* Services */
  .services-grid { grid-template-columns: 1fr; }

  /* NDT */
  .ndt-grid { grid-template-columns: repeat(2, 1fr); }

  /* Specialized */
  .spec-grid { grid-template-columns: repeat(2, 1fr); }

  /* Clients */
  .clients-grid { grid-template-columns: repeat(3, 1fr); }

  /* Contact */
  .contact-grid { grid-template-columns: 1fr; }
  .contact-form { padding: 28px 22px; }
  .form-row     { grid-template-columns: 1fr; }

  /* About pillars */
  .about-pillars { flex-direction: column; gap: 16px; }

  /* Footer */
  .footer-grid    { grid-template-columns: 1fr 1fr; }
  .footer-bottom  { flex-direction: column; gap: 6px; text-align: center; }
}

/* ============================================================
   RESPONSIVE — SMALL MOBILE (≤ 480 px)
   ============================================================ */
@media (max-width: 480px) {
  .ndt-grid       { grid-template-columns: 1fr; }
  .spec-grid      { grid-template-columns: 1fr; }
  .clients-grid   { grid-template-columns: repeat(2, 1fr); }
  .footer-grid    { grid-template-columns: 1fr; }
  .hero-title     { font-size: 2rem; }
  .contact-form   { padding: 22px 16px; }
}