/* General Styles */
* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: 'Helvetica Neue', Arial, sans-serif;
  line-height: 1.6;
  color: #333;
  background-color: #f5f7fa;
}

/* Header */
header {
  background-color: #004c8c;
  color: #fff;
  padding: 0.5rem 1rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  position: sticky;
  top: 0;
  z-index: 1000;
}

header .logo {
  font-size: 1.4rem;
  font-weight: bold;
  text-transform: uppercase;
}

nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: 1rem;
}

nav a {
  color: #fff;
  text-decoration: none;
  font-weight: 500;
  transition: color 0.3s ease;
}

nav a:hover {
  color: #cce7ff;
}

/* Hero section */
.hero {
  background: url('images/abstract.png') no-repeat center center/cover;
  color: #fff;
  text-align: center;
  padding: 6rem 1rem;
  position: relative;
}

.hero::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.4);
  z-index: 0;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 900px;
  margin: 0 auto;
}

.hero h1 {
  font-size: 2.5rem;
  margin-bottom: 1rem;
}

.hero p {
  font-size: 1.2rem;
  margin-bottom: 2rem;
}

.btn {
  display: inline-block;
  background-color: #007acc;
  color: #fff;
  padding: 0.75rem 1.5rem;
  border-radius: 4px;
  text-decoration: none;
  font-weight: bold;
  transition: background-color 0.3s ease;
}

.btn:hover {
  background-color: #005fa3;
}

/* Main content sections */
section {
  padding: 3rem 1rem;
  max-width: 1100px;
  margin: 0 auto;
}

section h2 {
  color: #004c8c;
  margin-bottom: 1rem;
  font-size: 2rem;
  border-bottom: 2px solid #004c8c;
  display: inline-block;
  padding-bottom: 0.3rem;
}

/* Grid layouts */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1.5rem;
}

.card {
  background-color: #fff;
  border-radius: 6px;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
  padding: 1rem;
  transition: transform 0.2s ease;
}

.card:hover {
  transform: translateY(-4px);
}

.card h3 {
  margin-top: 0;
  color: #004c8c;
}

.card p {
  font-size: 0.95rem;
}

/* Footer */
footer {
  background-color: #002a4f;
  color: #fff;
  padding: 2rem 1rem;
}

footer .footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1rem;
}

footer h4 {
  margin-top: 0;
  margin-bottom: 0.5rem;
  font-size: 1.2rem;
}

footer ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

footer li {
  margin-bottom: 0.5rem;
}

footer a {
  color: #cce7ff;
  text-decoration: none;
}

footer a:hover {
  text-decoration: underline;
}

/* Responsive adjustments */
@media (max-width: 768px) {
  .hero h1 {
    font-size: 2rem;
  }
  .hero p {
    font-size: 1rem;
  }
}