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

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

.container {
  max-width: 1200px;
  margin: auto;
  padding: 2rem;
}

/* Header */
header {
  background: #0f172a;
  color: #fff;
  text-align: center;
  padding: 3rem 0;
}

header h1 {
  font-size: 2.5rem;
  margin-bottom: 0.5rem;
}

header p a {
  color: #60a5fa;
  text-decoration: none;
}

/* Sections */
section {
  margin-top: 3rem;
}

h2, h3 {
  color: #0f172a;
  margin-bottom: 1rem;
}

.intro p {
  font-size: 1.2rem;
}

/* Card Grid */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.2rem;
}

.card {
  background: #fff;
  padding: 1.2rem;
  border-radius: 10px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.05);
  transition: all 0.3s ease;
}

.card:hover {
  transform: translateY(-5px);
  box-shadow: 0 6px 16px rgba(0,0,0,0.1);
}

/* Footer */
footer {
  background: #0f172a;
  color: #fff;
  text-align: center;
  padding: 2rem 0;
  margin-top: 4rem;
}

/* Responsive */
@media (max-width: 768px) {
  header h1 {
    font-size: 2rem;
  }

  .card-grid {
    grid-template-columns: 1fr;
  }
}