/* Base styles */
html, body {
  margin: 0;
  padding: 0;
  font-family: Arial, Helvetica, sans-serif;
  color: #333;
  background-color: #f7f8fa;
  line-height: 1.6;
}

a {
  color: #336699;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

/* Navigation */
header {
  background: #1e3a5f;
  color: #fff;
  padding: 10px 20px;
}

nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
}

nav ul li {
  margin-right: 20px;
}

nav ul li a {
  color: #fff;
  font-weight: bold;
}

/* Hero section */
.hero {
  background: linear-gradient(rgba(30,58,95,0.8), rgba(30,58,95,0.8)), url('assets/images/certificate.jpeg') center/cover;
  color: #fff;
  padding: 100px 20px;
  text-align: center;
}

.hero h1 {
  margin-bottom: 10px;
  font-size: 2.5rem;
}

.hero p {
  font-size: 1.2rem;
  max-width: 700px;
  margin: 0 auto;
}

.btn {
  display: inline-block;
  background: #336699;
  color: #fff;
  padding: 10px 20px;
  margin-top: 20px;
  border-radius: 4px;
  transition: background 0.3s;
}

.btn:hover {
  background: #264d73;
}

/* Sections */
section {
  padding: 40px 20px;
  max-width: 1000px;
  margin: 0 auto;
}

.section-title {
  margin-bottom: 20px;
  color: #1e3a5f;
  font-size: 2rem;
  text-align: center;
}

/* Service cards */
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 20px;
}

.card {
  background: #fff;
  border-radius: 8px;
  box-shadow: 0 2px 5px rgba(0,0,0,0.1);
  padding: 20px;
}

.card h3 {
  margin-top: 0;
  color: #1e3a5f;
}

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

/* Portfolio */
.portfolio-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 20px;
}

.portfolio-item {
  background: #fff;
  padding: 20px;
  border-radius: 8px;
  box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

.portfolio-item h4 {
  margin-top: 0;
  color: #1e3a5f;
}

/* Footer */
footer {
  background: #1e3a5f;
  color: #fff;
  text-align: center;
  padding: 20px;
  font-size: 0.9rem;
}

@media (max-width: 600px) {
  nav ul {
    flex-direction: column;
  }
  nav ul li {
    margin-bottom: 10px;
  }
  .hero {
    padding: 60px 20px;
  }
  .hero h1 {
    font-size: 2rem;
  }
}