:root {
  --primary: #0A192F;
  --secondary: #112240;
  --accent: #0077FF;
  --accent-hover: #005CE6;
  --text: #334155;
  --text-dark: #0F172A;
  --text-light: #64748B;
  --bg: #F8FAFC;
  --white: #FFFFFF;
  --border: #E2E8F0;
  --radius: 8px;
  --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
  font-family: var(--font-sans);
  color: var(--text);
  line-height: 1.6;
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 { color: var(--text-dark); line-height: 1.2; font-weight: 700; }
a { color: var(--accent); text-decoration: none; transition: color 0.2s; }
a:hover { color: var(--accent-hover); }
img { max-width: 100%; height: auto; display: block; }
ul { list-style: none; }

/* Container */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* Header */
header {
  background: var(--white);
  box-shadow: 0 1px 3px rgba(0,0,0,0.05);
  position: sticky;
  top: 0;
  z-index: 1000;
}

.header-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 80px;
}

.logo {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--primary);
  text-decoration: none;
}

.logo span { color: var(--accent); }

/* Navigation */
.nav-links {
  display: flex;
  gap: 2rem;
  align-items: center;
}

.nav-links a {
  color: var(--text-dark);
  font-weight: 500;
  font-size: 0.95rem;
}

.nav-links a:hover { color: var(--accent); }

.dropdown { position: relative; }
.dropdown-content {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  background: var(--white);
  min-width: 280px;
  box-shadow: var(--shadow);
  border-radius: var(--radius);
  padding: 0.5rem 0;
}
.dropdown:hover .dropdown-content { display: block; }
.dropdown-content a {
  display: block;
  padding: 0.75rem 1.5rem;
  font-size: 0.9rem;
}
.dropdown-content a:hover { background: var(--bg); }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.5rem;
  background: var(--accent);
  color: var(--white);
  font-weight: 600;
  border-radius: var(--radius);
  transition: background 0.2s;
}
.btn:hover { background: var(--accent-hover); color: var(--white); }
.btn-secondary { background: var(--secondary); }
.btn-secondary:hover { background: var(--primary); }

/* Mobile Menu */
.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--primary);
}

/* Hero Section */
.hero {
  background: linear-gradient(rgba(10, 25, 47, 0.85), rgba(10, 25, 47, 0.95)), url('images/hero-bg.jpg') center/cover;
  color: var(--white);
  padding: 6rem 0;
  text-align: center;
}
.hero h1 { color: var(--white); font-size: 3rem; margin-bottom: 1.5rem; }
.hero p { font-size: 1.25rem; color: #cbd5e1; max-width: 800px; margin: 0 auto 2rem; }

/* Sections */
.section { padding: 5rem 0; }
.section-light { background: var(--white); }
.section-dark { background: var(--primary); color: var(--white); }
.section-dark h2, .section-dark h3 { color: var(--white); }
.section-title { text-align: center; font-size: 2.25rem; margin-bottom: 3rem; }

/* Grid Layouts */
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 4rem; align-items: center; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 2rem; }

/* Cards */
.card {
  background: var(--white);
  padding: 2rem;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
  transition: transform 0.2s;
}
.card:hover { transform: translateY(-5px); }
.card h3 { margin-bottom: 1rem; font-size: 1.25rem; }

/* Call Box */
.call-box {
  background: var(--bg);
  border-left: 4px solid var(--accent);
  padding: 2rem;
  margin: 2rem 0;
  border-radius: 0 var(--radius) var(--radius) 0;
}
.call-box h3 { margin-bottom: 0.5rem; }
.call-box p { margin-bottom: 1rem; }

/* Footer */
footer {
  background: var(--primary);
  color: #cbd5e1;
  padding: 4rem 0 2rem;
}
.footer-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 2rem; margin-bottom: 3rem; }
.footer-col h4 { color: var(--white); margin-bottom: 1.5rem; font-size: 1.1rem; }
.footer-col a { color: #cbd5e1; display: block; margin-bottom: 0.75rem; }
.footer-col a:hover { color: var(--white); }
.footer-bottom {
  text-align: center;
  padding-top: 2rem;
  border-top: 1px solid rgba(255,255,255,0.1);
  font-size: 0.875rem;
}

/* Mobile Sticky Call */
.mobile-sticky-call {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  width: 100%;
  background: var(--accent);
  color: var(--white);
  text-align: center;
  padding: 1rem;
  font-weight: 700;
  z-index: 1000;
  box-shadow: 0 -2px 10px rgba(0,0,0,0.1);
}

/* Responsive */
@media (max-width: 1024px) {
  .grid-2 { gap: 2rem; }
}
@media (max-width: 768px) {
  .header-inner { height: 70px; }
  .mobile-menu-btn { display: block; }
  .nav-links {
    display: none;
    position: absolute;
    top: 70px;
    left: 0;
    width: 100%;
    background: var(--white);
    flex-direction: column;
    padding: 1rem 0;
    box-shadow: var(--shadow);
    gap: 0;
  }
  .nav-links.active { display: flex; }
  .nav-links a, .btn.header-btn {
    padding: 1rem 2rem;
    width: 100%;
    text-align: left;
    border-radius: 0;
  }
  .dropdown-content {
    position: static;
    box-shadow: none;
    padding: 0;
  }
  .dropdown-content a { padding-left: 3rem; }
  
  .hero h1 { font-size: 2rem; }
  .grid-2, .grid-3 { grid-template-columns: 1fr; gap: 2rem; }
  .footer-grid { grid-template-columns: 1fr; }
  
  body { padding-bottom: 60px; }
  .mobile-sticky-call { display: block; }
}

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; animation: none !important; }
}