/* === Global === */

*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: #0A2C3C;
  color: white;
}

/* A centered, max-width wrapper */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* === Header & Navigation === */

header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 40px;
  background: #0A2C3C;
  border-bottom: 1px solid #1A4E63;
}

header img {
  height: 60px;
}

header nav {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

header nav a {
  color: white;
  text-decoration: none;
  font-weight: 500;
  font-size: 15px;
  transition: color 0.2s ease;
}

header nav a:hover {
  color: #5FD8D8;
}

/* === Hero Sections === */

.hero {
  padding: 120px 20px;
  background: #132E3F;
  text-align: center;
  border-bottom: 1px solid #1A4E63;
}

.hero h1 {
  font-size: 56px;
  margin-bottom: 20px;
  color: #ffffff;
}

.hero p {
  font-size: 20px;
  max-width: 800px;
  margin: 0 auto;
  color: #B0D4DC;
}

/* === Generic Sections === */

.section {
  padding: 80px 20px;
}

.section-dark {
  background: #0A2C3C;
}

.section-alt {
  background: #132E3F;
  border-top: 1px solid #1A4E63;
  border-bottom: 1px solid #1A4E63;
}

.section-title {
  font-size: 40px;
  text-align: center;
  margin: 0 0 40px;
  color: #ffffff;
}

/* Two-column layout */

.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 50px;
}

.section-box {
  background: #0A2C3C;
  border: 1px solid #1A4E63;
  border-radius: 12px;
  padding: 40px;
  max-width: 800px;
  margin: 0 auto;
}

/* === Footer === */

footer {
  text-align: center;
  padding: 20px;
  background: #0A2C3C;
  border-top: 1px solid #1A4E63;
  color: #B0D4DC;
  font-size: 14px;
}

/* === Responsive === */

@media (max-width: 900px) {
  header {
    flex-direction: column;
    align-items: flex-start;
    padding: 16px 20px;
    gap: 10px;
  }

  header nav {
    gap: 12px;
  }

  .hero {
    padding: 80px 20px;
  }

  .hero h1 {
    font-size: 40px;
  }

  .two-col {
    grid-template-columns: 1fr;
  }
}