* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: "Segoe UI", Tahoma, sans-serif;
}

body {
  background: linear-gradient(120deg, #f0f4ff, #f9fbff);
  color: #333;
}

/* ===== HEADER ===== */
header {
  background: linear-gradient(90deg, #1e3c72, #2a5298);
  color: #fff;
  padding: 25px 10%;
  box-shadow: 0 4px 10px rgba(0,0,0,0.15);
}

header h1 {
  font-size: 28px;
  margin-bottom: 10px;
}

/* ===== NAVBAR ===== */
nav {
  display: flex;
  gap: 15px;
}

nav a {
  text-decoration: none;
  color: #fff;
  padding: 8px 16px;
  border-radius: 20px;
  transition: all 0.3s ease;
  font-size: 15px;
}

nav a:hover {
  background-color: rgba(255,255,255,0.25);
  transform: translateY(-2px);
}

nav a.active {
  background-color: #ffcc00;
  color: #000;
  font-weight: 600;
}

/* ===== MAIN CONTENT ===== */
main {
  padding: 60px 10%;
  animation: fadeIn 0.8s ease-in;
}

main h2 {
  font-size: 30px;
  margin-bottom: 15px;
  color: #1e3c72;
}

main p {
  font-size: 16px;
  line-height: 1.7;
  margin-bottom: 15px;
}

/* ===== CARD STYLE ===== */
.card {
  background: #fff;
  padding: 25px;
  border-radius: 12px;
  box-shadow: 0 10px 25px rgba(0,0,0,0.1);
  max-width: 700px;
}

/* ===== FOOTER ===== */
footer {
  background: #1e3c72;
  color: #fff;
  text-align: center;
  padding: 15px;
  font-size: 14px;
}

/* ===== ANIMATION ===== */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
  header {
    padding: 20px;
  }

  main {
    padding: 40px 20px;
  }

  nav {
    flex-wrap: wrap;
  }
}