/* ========== RESET & BASE ========== */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { font-family: 'Open Sans', sans-serif; color: #333; line-height: 1.6; background: #fff; }
a { text-decoration: none; color: inherit; }
img { max-width: 100%; height: auto; display: block; }
ul { list-style: none; }
h1,h2,h3,h4,h5 { font-family: 'Montserrat', sans-serif; color: #0C1B33; line-height: 1.3; }
.container { max-width: 1140px; margin: 0 auto; padding: 0 20px; }
section { scroll-margin-top: 70px; }

/* ========== BUTTONS ========== */
.btn { display: inline-block; padding: 14px 36px; font-family: 'Montserrat', sans-serif; font-size: 15px; font-weight: 600; border-radius: 4px; cursor: pointer; transition: all .3s; border: none; }
.btn-primary { background: #1A3A6B; color: #fff; }
.btn-primary:hover { background: #15305A; transform: translateY(-2px); box-shadow: 0 4px 15px rgba(26,58,107,.3); }
.btn-outline { background: transparent; color: #1A3A6B; border: 2px solid #1A3A6B; }
.btn-outline:hover { background: #1A3A6B; color: #fff; }
.btn-white { background: #fff; color: #1A3A6B; }
.btn-white:hover { background: #f0f0f0; }

/* ========== HEADER ========== */
.site-header { position: fixed; top: 0; left: 0; width: 100%; z-index: 1000; background: #fff; box-shadow: 0 2px 10px rgba(0,0,0,.08); }
.header-inner { max-width: 1140px; margin: 0 auto; padding: 0 20px; display: flex; align-items: center; justify-content: space-between; height: 70px; }
.logo { display: flex; align-items: center; gap: 10px; font-family: 'Montserrat', sans-serif; font-size: 22px; font-weight: 700; color: #1A3A6B; }
.logo img { height: 45px; width: auto; }
.main-nav ul { display: flex; gap: 28px; }
.main-nav a { font-family: 'Montserrat', sans-serif; font-size: 13px; font-weight: 600; color: #333; text-transform: uppercase; letter-spacing: .5px; padding: 8px 0; position: relative; transition: color .3s; }
.main-nav a::after { content: ''; position: absolute; bottom: 0; left: 0; width: 0; height: 2px; background: #1A3A6B; transition: width .3s; }
.main-nav a:hover, .main-nav a.active { color: #1A3A6B; }
.main-nav a:hover::after, .main-nav a.active::after { width: 100%; }
.header-right { display: flex; align-items: center; gap: 16px; }
.lang-switcher { display: flex; align-items: center; gap: 6px; font-family: 'Montserrat', sans-serif; font-size: 13px; font-weight: 600; }
.lang { color: #999; transition: color .3s; padding: 4px 6px; border-radius: 3px; }
.lang.active, .lang:hover { color: #1A3A6B; background: rgba(26,58,107,.06); }
.lang-sep { color: #ddd; }
.mobile-toggle { display: none; background: none; border: none; font-size: 22px; color: #333; cursor: pointer; }

/* ========== PAGE HERO (inner pages) ========== */
.page-hero { position: relative; height: 350px; display: flex; align-items: center; justify-content: center; text-align: center; background: #0C1B33; margin-top: 70px; overflow: hidden; }
.page-hero .hero-bg { position: absolute; inset: 0; background-size: cover; background-position: center; opacity: .3; }
.page-hero h1 { position: relative; z-index: 2; color: #fff; font-size: 48px; font-weight: 700; }

/* ========== HOME HERO ========== */
.hero { position: relative; min-height: 100vh; display: flex; align-items: center; justify-content: center; text-align: center; overflow: hidden; margin-top: 70px; }
.hero-bg { position: absolute; inset: 0; background: url('images/hero-bg.jpg') center/cover no-repeat; }
.hero-overlay { position: absolute; inset: 0; background: linear-gradient(135deg, rgba(12,27,51,.82), rgba(26,58,107,.75)); }
.hero-content { position: relative; z-index: 2; max-width: 750px; padding: 0 20px; }
.hero-badge { display: inline-block; font-family: 'Montserrat', sans-serif; font-size: 13px; font-weight: 700; color: #fff; background: rgba(255,255,255,.15); border: 1px solid rgba(255,255,255,.3); padding: 6px 18px; border-radius: 20px; letter-spacing: 1px; margin-bottom: 20px; text-transform: uppercase; }
.hero h1 { font-size: 58px; font-weight: 700; color: #fff; margin-bottom: 24px; letter-spacing: 1px; }
.hero p { font-size: 18px; color: rgba(255,255,255,.85); line-height: 1.8; margin-bottom: 36px; }

/* ========== SECTION COMMON ========== */
.section { padding: 90px 0; }
.section-gray { background: #F5F6FA; }
.section-dark { background: #0C1B33; }
.section-title { font-size: 36px; font-weight: 700; text-align: center; margin-bottom: 16px; }
.section-subtitle { font-size: 16px; color: #666; text-align: center; max-width: 650px; margin: 0 auto 50px; line-height: 1.7; }
.section-dark .section-title { color: #fff; }
.section-dark .section-subtitle { color: rgba(255,255,255,.7); }

/* ========== ABOUT (home preview) ========== */
.about-preview { text-align: center; }
.about-preview p { font-size: 17px; color: #555; line-height: 1.9; max-width: 750px; margin: 0 auto 40px; }

/* ========== ABOUT PAGE ========== */
.about-content { display: grid; grid-template-columns: 1fr 1fr; gap: 50px; align-items: center; margin-bottom: 60px; }
.about-text h3 { font-size: 24px; margin-bottom: 16px; }
.about-text p { font-size: 15px; color: #555; line-height: 1.8; margin-bottom: 16px; }
.about-img { border-radius: 10px; overflow: hidden; background: #e9ecef; min-height: 300px; display: flex; align-items: center; justify-content: center; }
.about-img img { width: 100%; height: 100%; object-fit: cover; }
.placeholder-img { width: 100%; min-height: 300px; background: linear-gradient(135deg, #1A3A6B 0%, #0C1B33 100%); border-radius: 10px; display: flex; align-items: center; justify-content: center; color: rgba(255,255,255,.4); font-size: 14px; font-family: 'Montserrat', sans-serif; }
.stats-row { display: grid; grid-template-columns: repeat(4, 1fr); gap: 30px; text-align: center; padding: 50px 0; border-top: 1px solid #eee; border-bottom: 1px solid #eee; margin-bottom: 60px; }
.stat-item h3 { font-size: 42px; font-weight: 700; color: #1A3A6B; margin-bottom: 6px; }
.stat-item p { font-size: 14px; color: #666; font-weight: 600; text-transform: uppercase; letter-spacing: .5px; }

/* ========== SERVICES ========== */
.services-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.service-card { background: #fff; padding: 40px 28px; border-radius: 10px; text-align: center; box-shadow: 0 2px 15px rgba(0,0,0,.06); transition: transform .3s, box-shadow .3s; }
.service-card:hover { transform: translateY(-5px); box-shadow: 0 8px 30px rgba(0,0,0,.1); }
.service-icon { width: 70px; height: 70px; margin: 0 auto 20px; display: flex; align-items: center; justify-content: center; border-radius: 50%; background: rgba(26,58,107,.08); }
.service-icon i { font-size: 28px; color: #1A3A6B; }
.service-card h4 { font-size: 18px; font-weight: 600; margin-bottom: 12px; }
.service-card p { font-size: 14px; color: #666; line-height: 1.7; }

/* ========== SERVICES PAGE - detailed ========== */
.service-detail { display: grid; grid-template-columns: 1fr 1fr; gap: 50px; align-items: center; padding: 60px 0; border-bottom: 1px solid #eee; }
.service-detail:nth-child(even) { direction: rtl; }
.service-detail:nth-child(even) > * { direction: ltr; }
.service-detail:last-child { border-bottom: none; }
.service-detail-img { border-radius: 10px; overflow: hidden; }
.service-detail-text h3 { font-size: 26px; margin-bottom: 16px; }
.service-detail-text p { font-size: 15px; color: #555; line-height: 1.8; margin-bottom: 12px; }
.service-detail-text ul { margin: 12px 0; padding-left: 20px; }
.service-detail-text ul li { font-size: 14px; color: #555; line-height: 1.8; list-style: disc; margin-bottom: 4px; }

/* ========== SERVICE CENTER ========== */
.section-service-center { padding: 60px 0; background: #fff; }
.service-center-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 40px; align-items: center; max-width: 700px; margin: 0 auto; }
.service-center-item { display: flex; align-items: center; justify-content: center; padding: 20px; }
.service-center-item img { max-height: 80px; width: auto; object-fit: contain; filter: grayscale(100%); opacity: .5; transition: all .3s; }
.service-center-item:hover img { filter: grayscale(0%); opacity: 1; }

/* ========== FULL-WIDTH IMAGE ========== */
.fullwidth-image { position: relative; height: 400px; overflow: hidden; }
.fullwidth-image-bg { position: absolute; inset: 0; background-size: cover; background-position: center; }

/* ========== BRANDS ========== */
.brands-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 30px; align-items: center; }
.brand-item { display: flex; flex-direction: column; align-items: center; gap: 10px; padding: 24px 16px; border-radius: 8px; background: #fff; box-shadow: 0 2px 10px rgba(0,0,0,.04); transition: transform .3s, box-shadow .3s; }
.brand-item:hover { transform: scale(1.05); box-shadow: 0 4px 20px rgba(0,0,0,.08); }
.brand-item img { height: 60px; width: auto; object-fit: contain; filter: grayscale(100%); opacity: .5; transition: all .3s; }
.brand-item:hover img { filter: grayscale(0%); opacity: 1; }
.brand-item span { font-family: 'Montserrat', sans-serif; font-size: 12px; font-weight: 600; color: #888; text-transform: uppercase; letter-spacing: .5px; margin-top: 4px; }

/* ========== FLEET PAGE - aircraft cards ========== */
.fleet-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 30px; }
.aircraft-card { background: #fff; border-radius: 10px; overflow: hidden; box-shadow: 0 2px 15px rgba(0,0,0,.06); transition: transform .3s; }
.aircraft-card:hover { transform: translateY(-4px); }
.aircraft-card-img { height: 220px; background: linear-gradient(135deg, #1A3A6B, #0C1B33); display: flex; align-items: center; justify-content: center; color: rgba(255,255,255,.3); font-size: 13px; font-family: 'Montserrat', sans-serif; }
.aircraft-card-img img { width: 100%; height: 100%; object-fit: cover; }
.aircraft-card-body { padding: 24px; }
.aircraft-card-body h4 { font-size: 18px; font-weight: 700; margin-bottom: 14px; }
.aircraft-specs { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.spec-item { font-size: 13px; color: #555; }
.spec-item strong { color: #0C1B33; }

/* ========== CERTIFICATIONS ========== */
.certs-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; }
.cert-card-img { display: flex; flex-direction: column; align-items: center; background: #fff; padding: 20px; border-radius: 10px; box-shadow: 0 2px 15px rgba(0,0,0,.06); transition: transform .3s, box-shadow .3s; overflow: hidden; }
.cert-card-img:hover { transform: translateY(-5px); box-shadow: 0 8px 30px rgba(0,0,0,.1); }
.cert-card-img img { width: 100%; height: auto; border-radius: 6px; display: block; }

/* ========== CONTACT ========== */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 50px; align-items: start; }
.info-item { display: flex; gap: 16px; margin-bottom: 24px; }
.info-item i { font-size: 20px; color: #1A3A6B; margin-top: 4px; flex-shrink: 0; }
.info-item strong { display: block; font-family: 'Montserrat', sans-serif; font-size: 14px; font-weight: 600; margin-bottom: 4px; color: #0C1B33; }
.info-item p { font-size: 14px; color: #555; line-height: 1.6; }
.info-item a { color: #1A3A6B; }
.info-item a:hover { color: #15305A; }
.map-container { margin-top: 10px; border-radius: 10px; overflow: hidden; }
.map-container iframe { display: block; }
.contact-form { background: #F9FAFB; padding: 36px; border-radius: 10px; }
.contact-form h3 { font-size: 22px; font-weight: 600; margin-bottom: 24px; }
.form-group { margin-bottom: 18px; }
.form-group label { display: block; font-family: 'Montserrat', sans-serif; font-size: 13px; font-weight: 600; color: #333; margin-bottom: 6px; }
.form-group input[type="text"], .form-group input[type="email"], .form-group textarea { width: 100%; padding: 12px 16px; font-family: 'Open Sans', sans-serif; font-size: 14px; border: 1px solid #ddd; border-radius: 6px; background: #fff; transition: border-color .3s; outline: none; }
.form-group input:focus, .form-group textarea:focus { border-color: #1A3A6B; }
.form-group textarea { resize: vertical; }
.contact-form .btn { width: 100%; text-align: center; }

/* ========== FOOTER ========== */
.site-footer { background: #0C1B33; padding: 28px 0; }
.footer-inner { display: flex; align-items: center; justify-content: center; gap: 8px; flex-wrap: wrap; }
.site-footer p { font-size: 13px; color: #888; }
.site-footer p a { color: #888; transition: color .3s; }
.site-footer p a:hover { color: #fff; }
.footer-brand { font-family: 'Montserrat', sans-serif; font-weight: 700; color: #fff; font-size: 13px; }

/* ========== RESPONSIVE ========== */
@media (max-width: 992px) {
  .services-grid { grid-template-columns: repeat(2, 1fr); }
  .brands-grid { grid-template-columns: repeat(3, 1fr); }
  .contact-grid, .about-content, .service-detail { grid-template-columns: 1fr; }
  .service-detail:nth-child(even) { direction: ltr; }
  .hero h1 { font-size: 44px; }
  .stats-row { grid-template-columns: repeat(2, 1fr); }
  .fleet-grid { grid-template-columns: 1fr; }
  .service-center-grid { grid-template-columns: repeat(3, 1fr); gap: 20px; }
  .certs-grid { grid-template-columns: repeat(2, 1fr); }
  .fullwidth-image { height: 280px; }
}
@media (max-width: 768px) {
  .main-nav { display: none; position: absolute; top: 70px; left: 0; width: 100%; background: #fff; box-shadow: 0 4px 15px rgba(0,0,0,.1); padding: 20px; z-index: 999; }
  .main-nav.open { display: block; }
  .main-nav ul { flex-direction: column; gap: 0; }
  .main-nav a { display: block; padding: 12px 0; border-bottom: 1px solid #f0f0f0; }
  .mobile-toggle { display: block; }
  .hero { min-height: 80vh; }
  .hero h1 { font-size: 34px; }
  .hero p { font-size: 16px; }
  .page-hero { height: 250px; }
  .page-hero h1 { font-size: 34px; }
  .services-grid { grid-template-columns: 1fr; }
  .certs-grid { grid-template-columns: 1fr; }
  .brands-grid { grid-template-columns: repeat(3, 1fr); gap: 16px; }
  .section-title { font-size: 28px; }
  .section { padding: 60px 0; }
  .container { padding: 0 20px; }
  .footer-inner { flex-direction: column; gap: 12px; text-align: center; }
  .service-center-grid { grid-template-columns: 1fr; gap: 16px; }
  .fullwidth-image { height: 200px; }
  .hero-badge { font-size: 11px; padding: 4px 14px; }
}
@media (max-width: 480px) {
  .brands-grid { grid-template-columns: repeat(2, 1fr); }
  .hero h1 { font-size: 28px; }
  .stats-row { grid-template-columns: 1fr; }
}