:root {
  --color-primary: #1d2b53; /* Deep navy */
  --color-primary-dark: #121c3b;
  --color-accent: #e53935; /* Safety red accent */
  --color-slate-900: #0f172a;
  --color-slate-800: #1e293b;
  --color-slate-700: #334155;
  --color-slate-600: #475569;
  --color-slate-300: #cbd5e1;
  --color-slate-200: #e2e8f0;
  --color-slate-100: #f1f5f9;
  --color-slate-50: #f8fafc;
  --color-white: #ffffff;
  
  --font-display: 'Oswald', sans-serif;
  --font-body: 'Inter', sans-serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: var(--font-body); color: var(--color-slate-800); line-height: 1.7; background: var(--color-white); overflow-x: hidden; }
h1, h2, h3, h4 { font-family: var(--font-display); font-weight: 700; color: var(--color-slate-900); text-transform: uppercase; letter-spacing: 0.5px; }
h1 { font-size: 3rem; line-height: 1.1; }
h2 { font-size: 2.25rem; line-height: 1.2; margin-bottom: 1rem; }
p { margin-bottom: 1.5rem; }
a { color: var(--color-primary); text-decoration: none; transition: color 0.2s; }
a:hover { color: var(--color-accent); }

.container { max-width: 1200px; margin: 0 auto; padding: 0 1.5rem; }
.content-container { max-width: 900px; margin: 0 auto; }
.section { padding: 6rem 0; }
.section-title { font-size: 2.5rem; margin-bottom: 1rem; color: var(--color-primary); }
.text-center { text-align: center; }
.lead-text { font-size: 1.25rem; color: var(--color-slate-600); line-height: 1.6; font-weight: 400; }
.mt-3 { margin-top: 1rem; }
.mt-4 { margin-top: 1.5rem; }
.mt-5 { margin-top: 3rem; }
.mb-1 { margin-bottom: 0.25rem; }
.mb-2 { margin-bottom: 0.5rem; }
.mb-3 { margin-bottom: 1rem; }
.mb-4 { margin-bottom: 1.5rem; }
.mb-5 { margin-bottom: 3rem; }
.my-4 { margin-top: 1.5rem; margin-bottom: 1.5rem; }
.my-5 { margin-top: 3rem; margin-bottom: 3rem; }
.p-3 { padding: 1rem; }
.p-4 { padding: 1.5rem; }
.p-5 { padding: 3rem; }
.py-2 { padding-top: 0.5rem; padding-bottom: 0.5rem; }
.py-3 { padding-top: 1rem; padding-bottom: 1rem; }
.w-full { width: 100%; }
.block { display: block; }
.inline-block { display: inline-block; }
.flex { display: flex; }
.items-center { align-items: center; }
.mx-auto { margin-left: auto; margin-right: auto; }
.max-w-md { max-width: 28rem; }
.rounded { border-radius: 4px; }
.shadow-sm { box-shadow: 0 4px 6px -1px rgba(0,0,0,0.05), 0 2px 4px -1px rgba(0,0,0,0.03); }
.border { border: 1px solid var(--color-slate-200); }
.border-t { border-top: 1px solid var(--color-slate-200); }
.border-top-primary { border-top: 4px solid var(--color-primary); }

.bg-slate { background: var(--color-slate-50); }
.bg-dark { background: var(--color-slate-900); }
.bg-primary-light { background: #f0f4f8; border: 1px solid #d0deeb; }
.text-white { color: var(--color-white); }
.text-white h1, .text-white h2, .text-white h3, .text-white p { color: var(--color-white); }
.text-white .lead-text { color: var(--color-slate-300); }
.text-primary { color: var(--color-primary); }
.text-slate-600 { color: var(--color-slate-600); }
.text-slate-700 { color: var(--color-slate-700); }
.text-slate-800 { color: var(--color-slate-800); }
.text-red-500 { color: var(--color-accent); }
.text-sm { font-size: 0.875rem; }
.text-lg { font-size: 1.125rem; }
.text-xl { font-size: 1.25rem; }
.text-2xl { font-size: 1.5rem; }
.text-3xl { font-size: 1.875rem; }
.text-6xl { font-size: 3.75rem; }
.font-bold { font-weight: 700; }
.font-semibold { font-weight: 600; }
.font-normal { font-weight: 400; }
.italic { font-style: italic; }
.not-italic { font-style: normal; }
.leading-relaxed { line-height: 1.625; }
.relative { position: relative; }
.absolute { position: absolute; }
.top-4 { top: 1rem; }
.left-4 { left: 1rem; }
.opacity-10 { opacity: 0.1; }
.font-serif { font-family: Georgia, serif; }

.img-responsive { max-width: 100%; height: auto; display: block; }
hr { border: 0; border-top: 1px solid var(--color-slate-200); margin: 3rem 0; }

.btn { display: inline-block; padding: 0.875rem 1.75rem; font-weight: 600; font-family: var(--font-display); text-transform: uppercase; letter-spacing: 0.5px; border-radius: 2px; transition: all 0.2s ease; cursor: pointer; border: none; text-align: center; }
.btn-primary { background: var(--color-primary); color: var(--color-white); border: 2px solid var(--color-primary); }
.btn-primary:hover { background: var(--color-white); color: var(--color-primary); text-decoration: none; }
.btn-secondary { background: transparent; border: 2px solid var(--color-white); color: var(--color-white); }
.btn-secondary:hover { background: var(--color-white); color: var(--color-slate-900); text-decoration: none; }

/* Header */
.site-header { padding: 1.25rem 0; background: var(--color-white); box-shadow: 0 4px 20px rgba(0,0,0,0.05); position: sticky; top: 0; z-index: 100; border-bottom: 3px solid var(--color-primary); }
.header-container { display: flex; justify-content: space-between; align-items: center; }
.logo { height: 60px; transition: transform 0.2s; }
.logo:hover { transform: scale(1.02); }
.main-nav ul { display: flex; gap: 2rem; list-style: none; align-items: center; margin: 0; }
.main-nav a { font-weight: 600; color: var(--color-slate-700); font-family: var(--font-display); font-size: 1.1rem; }
.main-nav a:hover { color: var(--color-primary); text-decoration: none; }
.btn-nav { background: var(--color-primary); color: var(--color-white) !important; padding: 0.5rem 1.25rem; border-radius: 2px; border: 2px solid var(--color-primary); }
.btn-nav:hover { background: transparent; color: var(--color-primary) !important; }
.mobile-nav-toggle { display: none; background: none; border: none; cursor: pointer; color: var(--color-slate-900); }

/* Hero */
.hero { position: relative; padding: 10rem 0 8rem; color: var(--color-white); overflow: hidden; min-height: 80vh; display: flex; align-items: center; }
.hero-bg { position: absolute; top: 0; left: 0; width: 100%; height: 100%; background-size: cover; background-position: center; background-attachment: fixed; z-index: 1; transform: scale(1.05); animation: slowZoom 20s infinite alternate; }
.hero-overlay { position: absolute; top: 0; left: 0; width: 100%; height: 100%; background: linear-gradient(135deg, rgba(15,23,42,0.95) 0%, rgba(29,43,83,0.85) 100%); z-index: 2; }
.hero-content { position: relative; z-index: 3; max-width: 850px; }
.hero-subtitle { display: inline-block; font-family: var(--font-display); color: var(--color-accent); font-weight: 700; text-transform: uppercase; letter-spacing: 2px; margin-bottom: 1rem; border-left: 3px solid var(--color-accent); padding-left: 1rem; font-size: 1.1rem; }
.hero h1 { color: var(--color-white); font-size: 4rem; line-height: 1.1; margin-bottom: 1.5rem; text-shadow: 0 2px 10px rgba(0,0,0,0.5); }
.hero-lead { font-size: 1.25rem; margin-bottom: 2.5rem; opacity: 0.9; max-width: 700px; font-weight: 300; }
.hero-actions { display: flex; gap: 1rem; margin-bottom: 4rem; }
.hero-stats { display: flex; gap: 4rem; border-top: 1px solid rgba(255,255,255,0.2); padding-top: 2rem; }
.stat-num { display: block; font-family: var(--font-display); font-size: 3rem; font-weight: 700; color: var(--color-white); line-height: 1; margin-bottom: 0.25rem; }
.stat-label { font-size: 0.875rem; text-transform: uppercase; letter-spacing: 1px; color: var(--color-slate-300); font-weight: 600; }

@keyframes slowZoom { 0% { transform: scale(1); } 100% { transform: scale(1.1); } }

/* Layouts & Components */
.page-header { padding: 5rem 0 4rem; border-bottom: 4px solid var(--color-primary); background: linear-gradient(to right, var(--color-slate-900), var(--color-primary)); }
.page-header h1 { margin-bottom: 0.5rem; }

.two-col-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 4rem; align-items: center; }
.video-wrapper { position: relative; padding-bottom: 56.25%; height: 0; border-radius: 4px; overflow: hidden; box-shadow: 0 20px 40px rgba(0,0,0,0.2); border: 1px solid var(--color-slate-200); }
.video-wrapper iframe { position: absolute; top: 0; left: 0; width: 100%; height: 100%; }

.grid { display: grid; gap: 1.5rem; }
.grid-2 { grid-template-columns: repeat(2, 1fr); gap: 2rem; }
.grid-3 { grid-template-columns: repeat(3, 1fr); gap: 2rem; }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

.card { background: var(--color-white); border-radius: 4px; overflow: hidden; box-shadow: 0 4px 6px -1px rgba(0,0,0,0.05); border: 1px solid var(--color-slate-200); }
.advantage-card { padding: 2rem 1rem; text-align: center; transition: all 0.3s ease; border-top: 3px solid transparent; }
.advantage-card:hover { transform: translateY(-5px); box-shadow: 0 10px 15px -3px rgba(0,0,0,0.1); border-top-color: var(--color-primary); }
.adv-icon { font-size: 2.5rem; color: var(--color-primary); margin-bottom: 1rem; line-height: 1; }
.advantage-card h3 { font-size: 1.1rem; margin: 0; color: var(--color-slate-800); }

figure.featured-image { margin: 2rem 0; }
figure.featured-image img { width: 100%; max-height: 500px; object-fit: cover; border: 1px solid var(--color-slate-200); }
figcaption { text-align: center; font-size: 0.875rem; color: var(--color-slate-600); margin-top: 0.5rem; font-style: italic; }

/* Lists */
.list-checked { list-style: none; padding: 0; }
.list-checked li { position: relative; padding-left: 2rem; margin-bottom: 0.75rem; font-weight: 500; }
.list-checked li::before { content: '✓'; position: absolute; left: 0; top: 0; color: #16a34a; font-weight: bold; }
.list-none { list-style: none; padding: 0; }
.customer-list li { padding: 0.5rem 0; border-bottom: 1px solid var(--color-slate-100); color: var(--color-slate-700); font-weight: 500; }
.customer-list li:last-child { border-bottom: none; }

/* Galleries & Literature */
.gallery-grid { margin-top: 2rem; }
.gallery-card { transition: transform 0.3s; }
.gallery-card:hover { transform: translateY(-5px); }
.gallery-card img { width: 100%; height: 200px; object-fit: cover; border-bottom: 1px solid var(--color-slate-100); }
.gallery-caption { padding: 1rem; font-size: 0.875rem; color: var(--color-slate-600); }
.gallery-caption p { margin: 0; }

.literature-card { transition: all 0.2s; border-left: 4px solid var(--color-slate-300); }
.literature-card:hover { transform: translateX(5px); border-left-color: var(--color-primary); box-shadow: 0 10px 15px -3px rgba(0,0,0,0.1); }
.literature-card.bg-primary-light { border-left-color: var(--color-primary); }

/* Forms */
.form-group input:focus, .form-group textarea:focus { border-color: var(--color-primary); box-shadow: 0 0 0 3px rgba(29, 43, 83, 0.1); }
.contact-layout { align-items: start; gap: 3rem; }

/* FAQ */
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item { margin-bottom: 1rem; border: 1px solid rgba(255,255,255,0.2); border-radius: 4px; overflow: hidden; background: rgba(255,255,255,0.05); }
.faq-item summary { padding: 1.5rem; font-weight: 700; cursor: pointer; font-family: var(--font-display); font-size: 1.25rem; color: var(--color-white); position: relative; list-style: none; }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: '+'; position: absolute; right: 1.5rem; top: 1.5rem; font-size: 1.5rem; line-height: 1; transition: transform 0.2s; }
.faq-item[open] summary::after { content: '−'; }
.faq-content { padding: 0 1.5rem 1.5rem; color: var(--color-slate-300); }

/* Footer */
.site-footer { background: var(--color-slate-900); color: var(--color-slate-300); padding-top: 5rem; border-top: 4px solid var(--color-primary); }
.footer-container { display: grid; grid-template-columns: 2fr 1.5fr 1.5fr; gap: 4rem; margin-bottom: 4rem; }
.footer-logo { height: 50px; margin-bottom: 1.5rem; filter: brightness(0) invert(1); }
.footer-col h3 { color: var(--color-white); margin-bottom: 1.5rem; font-size: 1.5rem; }
.footer-col ul { list-style: none; display: flex; flex-direction: column; gap: 0.75rem; padding: 0; }
.footer-col a { color: var(--color-slate-300); transition: color 0.2s; }
.footer-col a:hover { color: var(--color-white); text-decoration: none; }
.footer-col address { font-style: normal; line-height: 1.8; color: var(--color-slate-300); }
.footer-bottom { background: #080c17; padding: 1.5rem 0; text-align: center; font-size: 0.875rem; color: var(--color-slate-400); }

/* Utilities & Animations */
.scroll-fade { opacity: 0; transform: translateY(20px); transition: opacity 0.6s ease-out, transform 0.6s ease-out; }
.scroll-fade.is-visible { opacity: 1; transform: translateY(0); }
.fade-in-up { animation: fadeInUp 0.8s ease-out forwards; }
@keyframes fadeInUp { from { opacity: 0; transform: translateY(30px); } to { opacity: 1; transform: translateY(0); } }

@media (max-width: 992px) {
  .hero h1 { font-size: 3rem; }
  .grid-4, .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .footer-container { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  .hero { padding: 8rem 0 5rem; min-height: 60vh; }
  .hero h1 { font-size: 2.5rem; }
  .hero-actions { flex-direction: column; }
  .hero-stats { flex-direction: column; gap: 2rem; }
  .two-col-layout { grid-template-columns: 1fr; gap: 2rem; }
  .grid-4, .grid-3, .grid-2 { grid-template-columns: 1fr; }
  .footer-container { grid-template-columns: 1fr; gap: 3rem; }
  .section { padding: 4rem 0; }
  .page-header { padding: 3rem 0 2rem; }
  
  .main-nav { display: none; position: absolute; top: 100%; left: 0; right: 0; background: var(--color-white); padding: 1rem 0; border-bottom: 3px solid var(--color-primary); box-shadow: 0 10px 20px rgba(0,0,0,0.1); }
  .main-nav.active { display: block; }
  .main-nav ul { flex-direction: column; gap: 0; align-items: stretch; }
  .main-nav li { border-bottom: 1px solid var(--color-slate-100); }
  .main-nav a { display: block; padding: 1rem 1.5rem; }
  .btn-nav { border: none; background: transparent; color: var(--color-primary) !important; padding: 1rem 1.5rem; border-radius: 0; }
  .btn-nav:hover { background: var(--color-slate-50); }
  .mobile-nav-toggle { display: block; }
}