:root {
  --primary-color: #28a745; /* Green */
  --accent-color: #ff9800;  /* Orange */
  --bg-color: #f9f9f9;
  --text-color: #333;
  --nav-height: 60px;
  --font: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
  margin: 0;
  font-family: var(--font);
  background-color: var(--bg-color);
  color: var(--text-color);
}

/* Navigation */
.navbar {
  background-color: white;
  box-shadow: 0 2px 5px rgba(0,0,0,0.1);
  padding: 0 20px;
  height: var(--nav-height);
  display: flex;
  align-items: center;
  justify-content: space-around;
}

.navbar a {
  text-decoration: none;
  color: var(--text-color);
  font-weight: 600;
  padding: 10px;
  transition: color 0.3s, border-bottom 0.3s;
}

.navbar a.active,
.navbar a:hover {
  color: var(--primary-color);
  border-bottom: 2px solid var(--accent-color);
}

/* About Section */
.about {
  max-width: 800px;
  margin: 60px auto;
  padding: 0 20px;
  text-align: center;
}

.about h1 {
  color: var(--primary-color);
  font-size: 2.5rem;
  margin-bottom: 20px;
}

.about p {
  line-height: 1.6;
  font-size: 1.1rem;
  margin-bottom: 20px;
}

/* Footer */
footer {
  background-color: #fff;
  padding: 20px;
  text-align: center;
  font-size: 0.9rem;
  box-shadow: 0 -2px 4px rgba(0,0,0,0.05);
}

footer a {
  color: var(--accent-color);
  text-decoration: none;
  margin: 0 5px;
  transition: color 0.3s;
}

footer a:hover {
  color: var(--primary-color);
}

/* Responsive */
@media (max-width: 768px) {
  .navbar {
    flex-direction: column;
    height: auto;
    padding: 10px 0;
  }

  .about h1 {
    font-size: 2rem;
  }

  .about p {
    font-size: 1rem;
  }
}