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

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

/* Header & Footer */
header, footer {
  background: #004aad;
  color: #fff;
  padding: 1rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

header { position: sticky; top: 0; z-index: 1000; }
header .logo { font-size: 1.5rem; font-weight: bold; letter-spacing: 1px; }

nav a {
  color: #fff;
  margin-left: 1.5rem;
  text-decoration: none;
  font-weight: bold;
  padding: 0.3rem 0.6rem;
  border-radius: 5px;
  transition: background 0.3s, color 0.3s;
}
nav a:hover, nav a.active { background: #fff; color: #004aad; }

/* Headings */
h2 { color: #004aad; margin-bottom: 1rem; }

/* Sections */
section {
  background: #fff;
  margin: 2rem auto;
  padding: 2rem;
  border-radius: 8px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.08);
}

/* Footer */
footer { flex-direction: column; text-align: center; }
footer .social { margin-top: 0.5rem; }
footer .social a {
  color: #fff;
  margin: 0 10px;
  font-size: 1.6rem;
  transition: color 0.3s;
}
footer .social a:hover .fa-instagram { color: #E1306C; }
footer .social a:hover .fa-facebook { color: #1877F2; }
footer .social a:hover .fa-linkedin { color: #0A66C2; }