/* ============================================
   DAF FLIGHT MAINTENANCE — STYLES
   Color Palette: Navy (#0A1628, #1B3A5C), White, Gray (#F5F7FA, #6B7B8D)
   Fonts: Open Sans, Lato
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=Lato:wght@300;400;700;900&family=Open+Sans:wght@300;400;600;700&display=swap');

/* ---------- CSS Variables ---------- */
:root {
  --navy-dark: #0A1628;
  --navy: #1B3A5C;
  --navy-light: #264E78;
  --navy-accent: #3A6EA5;
  --white: #FFFFFF;
  --off-white: #F5F7FA;
  --gray-light: #E8ECF1;
  --gray: #6B7B8D;
  --gray-dark: #3D4F5F;
  --gold: #C9A84C;
  --font-heading: 'Lato', sans-serif;
  --font-body: 'Open Sans', sans-serif;
  --shadow-sm: 0 2px 8px rgba(10, 22, 40, .06);
  --shadow-md: 0 4px 20px rgba(10, 22, 40, .1);
  --shadow-lg: 0 8px 40px rgba(10, 22, 40, .15);
  --radius: 6px;
  --transition: .3s ease;
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: var(--font-body);
  color: var(--gray-dark);
  background: var(--white);
  line-height: 1.7;
  overflow-x: hidden;
}
a { text-decoration: none; color: inherit; transition: color var(--transition); }
ul { list-style: none; }
img { max-width: 100%; height: auto; display: block; }
button, input, textarea { font-family: inherit; font-size: inherit; }

/* ---------- Utility ---------- */
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.section-padding { padding: 100px 0; }
.section-header { text-align: center; margin-bottom: 60px; }
.section-header h2 {
  font-family: var(--font-heading);
  font-size: 2.4rem;
  font-weight: 700;
  color: var(--navy-dark);
  margin-bottom: 14px;
  letter-spacing: -.5px;
}
.section-header p {
  font-size: 1.05rem;
  color: var(--gray);
  max-width: 600px;
  margin: 0 auto;
}
.section-header .accent-line {
  width: 50px;
  height: 3px;
  background: var(--navy-accent);
  margin: 18px auto 0;
  border-radius: 2px;
}
.btn-primary {
  display: inline-block;
  padding: 14px 36px;
  background: var(--navy);
  color: var(--white);
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: .95rem;
  letter-spacing: .8px;
  text-transform: uppercase;
  border: 2px solid var(--navy);
  border-radius: var(--radius);
  cursor: pointer;
  transition: all var(--transition);
}
.btn-primary:hover {
  background: transparent;
  color: var(--navy);
}
.btn-outline {
  display: inline-block;
  padding: 14px 36px;
  background: transparent;
  color: var(--white);
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: .95rem;
  letter-spacing: .8px;
  text-transform: uppercase;
  border: 2px solid var(--white);
  border-radius: var(--radius);
  cursor: pointer;
  transition: all var(--transition);
}
.btn-outline:hover {
  background: var(--white);
  color: var(--navy-dark);
}

/* ---------- Animations ---------- */
.fade-in { opacity: 0; transform: translateY(30px); transition: opacity .7s ease, transform .7s ease; }
.fade-in.visible { opacity: 1; transform: translateY(0); }
.slide-left { opacity: 0; transform: translateX(-40px); transition: opacity .7s ease, transform .7s ease; }
.slide-left.visible { opacity: 1; transform: translateX(0); }
.slide-right { opacity: 0; transform: translateX(40px); transition: opacity .7s ease, transform .7s ease; }
.slide-right.visible { opacity: 1; transform: translateX(0); }

/* ============================================
   HEADER / NAVIGATION
   ============================================ */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  padding: 0;
  transition: background var(--transition), box-shadow var(--transition), padding var(--transition);
}
.site-header.transparent { background: transparent; }
.site-header.scrolled {
  background: rgba(10, 22, 40, .97);
  box-shadow: 0 2px 20px rgba(0,0,0,.15);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 40px;
  max-width: 1400px;
  margin: 0 auto;
}
.logo {
  display: flex;
  align-items: center;
  gap: 12px;
}
.logo-icon {
  width: 42px;
  height: 42px;
  background: var(--white);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  color: var(--navy-dark);
  font-weight: 900;
  font-family: var(--font-heading);
}
.logo-text {
  font-family: var(--font-heading);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--white);
  letter-spacing: .5px;
}
.logo-text span { color: var(--gold); }

/* Nav */
.main-nav ul {
  display: flex;
  align-items: center;
  gap: 6px;
}
.main-nav > ul > li { position: relative; }
.main-nav > ul > li > a {
  display: block;
  padding: 10px 18px;
  color: rgba(255,255,255,.85);
  font-family: var(--font-heading);
  font-size: .85rem;
  font-weight: 600;
  letter-spacing: 1px;
  text-transform: uppercase;
  transition: color var(--transition);
}
.main-nav > ul > li > a:hover,
.main-nav > ul > li.active > a { color: var(--white); }
.main-nav > ul > li > a::after {
  content: '';
  position: absolute;
  bottom: 4px;
  left: 18px;
  right: 18px;
  height: 2px;
  background: var(--gold);
  transform: scaleX(0);
  transition: transform var(--transition);
}
.main-nav > ul > li > a:hover::after,
.main-nav > ul > li.active > a::after { transform: scaleX(1); }

/* Dropdown */
.dropdown-toggle::after {
  content: '';
  display: inline-block;
  width: 0;
  height: 0;
  margin-left: 6px;
  vertical-align: middle;
  border-left: 4px solid transparent;
  border-right: 4px solid transparent;
  border-top: 5px solid currentColor;
}
.dropdown-menu {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 220px;
  background: var(--white);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  padding: 10px 0;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: all var(--transition);
}
.dropdown:hover .dropdown-menu,
.dropdown.open .dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.dropdown-menu li a {
  display: block;
  padding: 10px 24px;
  color: var(--gray-dark);
  font-size: .9rem;
  font-weight: 500;
  transition: background var(--transition), color var(--transition);
}
.dropdown-menu li a:hover {
  background: var(--off-white);
  color: var(--navy);
}

/* Hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  background: none;
  border: none;
  padding: 6px;
}
.hamburger span {
  display: block;
  width: 26px;
  height: 2px;
  background: var(--white);
  border-radius: 2px;
  transition: all var(--transition);
}
.hamburger.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.hamburger.active span:nth-child(2) { opacity: 0; }
.hamburger.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

/* ============================================
   HERO
   ============================================ */
.hero {
  position: relative;
  height: 100vh;
  min-height: 850px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background: var(--navy-dark);
}
.hero-bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  animation: slowPan 30s infinite alternate linear;
}
@keyframes slowPan {
  0% { transform: scale(1); }
  100% { transform: scale(1.08); }
}
.hero-bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(10,22,40,.80) 0%, rgba(27,58,92,.55) 100%);
}
.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 800px;
  padding: 0 24px;
}
.hero-content .overline {
  display: inline-block;
  font-family: var(--font-heading);
  font-size: .85rem;
  font-weight: 700;
  letter-spacing: 4px;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 20px;
}
.hero-content h1 {
  font-family: var(--font-heading);
  font-size: 4.2rem;
  font-weight: 900;
  color: var(--white);
  line-height: 1.15;
  margin-bottom: 20px;
  letter-spacing: -1px;
  text-shadow: 0 4px 20px rgba(0,0,0,0.3);
}
.hero-content .tagline {
  font-size: 1.35rem;
  color: rgba(255,255,255,.9);
  font-weight: 300;
  margin-bottom: 40px;
  text-shadow: 0 2px 10px rgba(0,0,0,0.2);
}
.hero-buttons { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
.hero-scroll-indicator {
  position: absolute;
  bottom: 36px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: rgba(255,255,255,.5);
  font-size: .75rem;
  letter-spacing: 2px;
  text-transform: uppercase;
}
.hero-scroll-indicator .scroll-line {
  width: 1px;
  height: 40px;
  background: rgba(255,255,255,.3);
  position: relative;
  overflow: hidden;
}
.hero-scroll-indicator .scroll-line::after {
  content: '';
  position: absolute;
  top: -100%;
  width: 100%;
  height: 100%;
  background: var(--white);
  animation: scrollDown 2s infinite;
}
@keyframes scrollDown { 0% { top: -100%; } 100% { top: 100%; } }

/* ============================================
   PAGE HERO (Internal Pages)
   ============================================ */
.page-hero {
  position: relative;
  padding: 240px 0 120px;
  background: var(--navy-dark);
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  text-align: center;
  color: var(--white);
}
.page-hero::after {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(10, 22, 40, 0.65);
  z-index: 1;
}
.page-hero .container {
  position: relative;
  z-index: 2;
}
.page-hero h1 {
  font-family: var(--font-heading);
  font-size: 3rem;
  font-weight: 900;
  margin-bottom: 12px;
}
.page-hero p {
  font-size: 1.15rem;
  color: rgba(255,255,255,.9);
}

/* ============================================
   ABOUT
   ============================================ */
.about { background: var(--white); }
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}
.about-image {
  border-radius: var(--radius);
  overflow: hidden;
  position: relative;
}
.about-image img {
  width: 100%;
  height: 450px;
  object-fit: cover;
}
.about-image .experience-badge {
  position: absolute;
  bottom: 24px;
  right: 24px;
  background: var(--navy);
  color: var(--white);
  padding: 18px 24px;
  border-radius: var(--radius);
  text-align: center;
}
.experience-badge .number {
  font-family: var(--font-heading);
  font-size: 2.2rem;
  font-weight: 900;
  line-height: 1;
  color: var(--gold);
}
.experience-badge .label {
  font-size: .75rem;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  margin-top: 4px;
}
.about-text h2 {
  font-family: var(--font-heading);
  font-size: 2.2rem;
  font-weight: 700;
  color: var(--navy-dark);
  margin-bottom: 18px;
  line-height: 1.25;
}
.about-text .lead {
  font-size: 1.1rem;
  color: var(--navy-accent);
  font-weight: 600;
  margin-bottom: 16px;
}
.about-text p {
  margin-bottom: 16px;
  color: var(--gray);
}
.about-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-top: 30px;
  padding-top: 30px;
  border-top: 1px solid var(--gray-light);
}
.stat-item { text-align: center; }
.stat-item .stat-number {
  font-family: var(--font-heading);
  font-size: 1.8rem;
  font-weight: 900;
  color: var(--navy);
}
.stat-item .stat-label {
  font-size: .8rem;
  color: var(--gray);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-top: 4px;
}

/* ============================================
   SERVICES
   ============================================ */
.services { background: var(--off-white); }
.services-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 28px;
}
.service-card {
  background: var(--white);
  border-radius: var(--radius);
  padding: 40px 28px;
  text-align: center;
  transition: transform var(--transition), box-shadow var(--transition);
  box-shadow: var(--shadow-sm);
  position: relative;
  overflow: hidden;
}
.service-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--navy-accent);
  transform: scaleX(0);
  transition: transform var(--transition);
}
.service-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.service-card:hover::before { transform: scaleX(1); }
.service-icon {
  width: 70px;
  height: 70px;
  background: var(--off-white);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 22px;
  font-size: 1.8rem;
  color: var(--navy);
  transition: background var(--transition), color var(--transition);
}
.service-card:hover .service-icon {
  background: var(--navy);
  color: var(--white);
}
.service-card h3 {
  font-family: var(--font-heading);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--navy-dark);
  margin-bottom: 12px;
}
.service-card p {
  font-size: .92rem;
  color: var(--gray);
  line-height: 1.65;
}

/* ============================================
   CERTIFICATIONS
   ============================================ */
.certifications { background: var(--navy-dark); color: var(--white); }
.certifications .section-header h2 { color: var(--white); }
.certifications .section-header p { color: rgba(255,255,255,.6); }
.certifications .accent-line { background: var(--gold); }
.certs-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.cert-card {
  background: rgba(255,255,255,.06);
  border: 1px solid rgba(255,255,255,.1);
  border-radius: var(--radius);
  padding: 40px 30px;
  text-align: center;
  transition: all var(--transition);
}
.cert-card:hover {
  background: rgba(255,255,255,.1);
  transform: translateY(-4px);
}
.cert-icon {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: rgba(201, 168, 76, .15);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
  font-size: 1.6rem;
  color: var(--gold);
}
.cert-card h3 {
  font-family: var(--font-heading);
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 10px;
}
.cert-card p {
  font-size: .9rem;
  color: rgba(255,255,255,.6);
  line-height: 1.6;
}

/* ============================================
   GALLERY
   ============================================ */
.gallery { background: var(--white); }
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  grid-auto-rows: 280px;
  gap: 16px;
}
.gallery-grid .wide { grid-column: span 2; }
.gallery-item {
  border-radius: var(--radius);
  overflow: hidden;
  position: relative;
  cursor: pointer;
}
.gallery-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .6s ease;
}
.gallery-item:hover img { transform: scale(1.06); }
.gallery-item .overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(10,22,40,.7) 0%, transparent 50%);
  display: flex;
  align-items: flex-end;
  padding: 20px;
  opacity: 0;
  transition: opacity var(--transition);
}
.gallery-item:hover .overlay { opacity: 1; }
.gallery-item .overlay span {
  color: var(--white);
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: .95rem;
}

/* ============================================
   CONTACT
   ============================================ */
.contact { background: var(--off-white); }
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 50px;
}
.contact-info h3 {
  font-family: var(--font-heading);
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--navy-dark);
  margin-bottom: 18px;
}
.contact-info > p {
  color: var(--gray);
  margin-bottom: 30px;
  line-height: 1.7;
}
.contact-detail {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: 22px;
}
.contact-detail .icon {
  width: 46px;
  height: 46px;
  background: var(--navy);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  color: var(--white);
  font-size: 1.1rem;
}
.contact-detail .text strong {
  display: block;
  font-family: var(--font-heading);
  font-size: .95rem;
  color: var(--navy-dark);
  margin-bottom: 2px;
}
.contact-detail .text span {
  font-size: .9rem;
  color: var(--gray);
}
.contact-form {
  background: var(--white);
  padding: 40px;
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
}
.form-group { margin-bottom: 20px; }
.form-group label {
  display: block;
  font-family: var(--font-heading);
  font-size: .85rem;
  font-weight: 700;
  color: var(--navy-dark);
  margin-bottom: 6px;
  text-transform: uppercase;
  letter-spacing: .5px;
}
.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 14px 18px;
  border: 1px solid var(--gray-light);
  border-radius: var(--radius);
  background: var(--off-white);
  color: var(--gray-dark);
  transition: border-color var(--transition), box-shadow var(--transition);
}
.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--navy-accent);
  box-shadow: 0 0 0 3px rgba(58,110,165,.12);
}
.form-group textarea { resize: vertical; min-height: 120px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.contact-form .btn-primary { width: 100%; text-align: center; }

/* ============================================
   FOOTER
   ============================================ */
.site-footer { background: var(--navy-dark); color: rgba(255,255,255,.7); padding: 70px 0 0; }
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.2fr;
  gap: 40px;
  padding-bottom: 50px;
  border-bottom: 1px solid rgba(255,255,255,.1);
}
.footer-brand .logo-text { font-size: 1.4rem; margin-bottom: 16px; }
.footer-brand p { font-size: .9rem; line-height: 1.7; max-width: 300px; }
.footer-col h4 {
  font-family: var(--font-heading);
  font-size: .85rem;
  font-weight: 700;
  color: var(--white);
  text-transform: uppercase;
  letter-spacing: 1.5px;
  margin-bottom: 20px;
}
.footer-col ul li { margin-bottom: 10px; }
.footer-col ul li a {
  font-size: .9rem;
  color: rgba(255,255,255,.6);
  transition: color var(--transition);
}
.footer-col ul li a:hover { color: var(--white); }
.footer-social {
  display: flex;
  gap: 12px;
  margin-top: 18px;
}
.footer-social a {
  width: 40px;
  height: 40px;
  background: rgba(255,255,255,.08);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255,255,255,.7);
  transition: all var(--transition);
}
.footer-social a:hover {
  background: var(--navy-accent);
  color: var(--white);
}
.footer-bottom {
  padding: 22px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: .82rem;
}
.footer-bottom a { color: var(--gold); }
.footer-bottom a:hover { color: var(--white); }

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 1024px) {
  .services-grid { grid-template-columns: repeat(2, 1fr); }
  .certs-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .section-padding { padding: 70px 0; }
  .section-header h2 { font-size: 1.9rem; }

  /* Nav */
  .hamburger { display: flex; }
  .main-nav {
    position: fixed;
    top: 0;
    right: -100%;
    width: 80%;
    max-width: 360px;
    height: 100vh;
    background: var(--navy-dark);
    padding: 80px 30px 30px;
    transition: right var(--transition);
    z-index: 999;
    overflow-y: auto;
  }
  .main-nav.open { right: 0; }
  .main-nav ul { flex-direction: column; gap: 0; }
  .main-nav > ul > li > a { padding: 14px 0; font-size: .95rem; }
  .main-nav > ul > li > a::after { display: none; }
  .dropdown-menu {
    position: static;
    box-shadow: none;
    background: rgba(255,255,255,.05);
    border-radius: 0;
    padding: 0 0 0 20px;
    opacity: 1;
    visibility: visible;
    transform: none;
    display: none;
  }
  .dropdown.open .dropdown-menu { display: block; }
  .dropdown-menu li a { color: rgba(255,255,255,.7); padding: 10px 0; }
  .mobile-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,.5);
    z-index: 998;
    display: none;
  }
  .mobile-overlay.active { display: block; }

  /* Hero */
  .hero { min-height: 600px; }
  .hero-content h1 { font-size: 2.4rem; }

  /* About */
  .about-grid { grid-template-columns: 1fr; gap: 40px; }
  .about-image img { height: 320px; }

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

  /* Certs */
  .certs-grid { grid-template-columns: 1fr; }

  /* Gallery */
  .gallery-grid { grid-template-columns: 1fr 1fr; grid-auto-rows: 220px; }
  .gallery-grid .wide { grid-column: span 1; }

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

  /* Footer */
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; gap: 8px; text-align: center; }
}

@media (max-width: 480px) {
  .hero-content h1 { font-size: 2rem; }
  .hero-buttons { flex-direction: column; align-items: center; }
  .btn-primary, .btn-outline { width: 100%; text-align: center; }
  .about-stats { grid-template-columns: 1fr; gap: 16px; }
}