* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: Arial, sans-serif;
}

body {
  color: #0b1320;
  background: #fff;
}

/* ================= HEADER ================= */

.header {
  position: fixed;
  top: 0;
  width: 100%;
  z-index: 1000;
  transition: background 0.3s ease, box-shadow 0.3s ease;
  background: rgba(255, 255, 255, 0.15);
  backdrop-filter: blur(10px);
}

.header.scrolled {
  background: #ffffff;
  box-shadow: 0 2px 10px rgba(0,0,0,0.08);
}

.nav {
  max-width: 1200px;
  margin: auto;
  padding: 14px 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-weight: 700;
  font-size: 20px;
}

.nav a {
  margin-left: 20px;
  text-decoration: none;
  color: #0b1320;
  font-weight: 500;
}

/* ================= HERO ================= */

.hero {
  height: 100vh;
  position: relative;
  overflow: hidden;
}

.hero video {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(6,16,35,0.85), rgba(6,16,35,0.4));
}

.hero-content {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  max-width: 900px;
  width: 90%;
  color: #fff;
}

.hero-content h1 {
  font-size: 48px;
  margin-bottom: 16px;
}

.hero-content p {
  font-size: 18px;
  margin-bottom: 24px;
  line-height: 1.5;
}

.btn {
  display: inline-block;
  padding: 12px 20px;
  background: #ffffff;
  color: #0b1320;
  text-decoration: none;
  border-radius: 6px;
  font-weight: 600;
}

/* ================= SECTIONS ================= */

.section {
  padding: 80px 20px;
}

.container {
  max-width: 1200px;
  margin: auto;
}

/* ================= CAPABILITIES TILES ================= */

.capabilities-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-top: 40px;
}

.cap-card {
  background: #f6f8fb;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 4px 12px rgba(0,0,0,0.06);
}

.cap-card img {
  width: 100%;
  height: 180px;
  object-fit: cover;
}

.cap-card .cap-body {
  padding: 16px;
}

.cap-card h3 {
  margin-bottom: 8px;
}

/* ================= OPERATIONAL ================= */

.light-section {
  background: #f6f8fb;
}

/* ================= INTERNAL HERO ================= */

.page-hero {
  height: 60vh;
  background: linear-gradient(180deg, #4b5563, #6b7280);
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding-top: 80px;
  color: #fff;
}

.page-hero h1 {
  font-size: 42px;
  margin-bottom: 10px;
}

/* ================= FOOTER ================= */

.footer {
  background: #000;
  color: #fff;
  text-align: center;
  padding: 30px 20px;
  margin-top: 80px;
}

/* ================= MOBILE ================= */

@media (max-width: 900px) {
  .capabilities-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .hero-content h1 {
    font-size: 32px;
  }
}

@media (max-width: 500px) {
  .capabilities-grid {
    grid-template-columns: 1fr;
  }
}