body { margin:0; font-family: Arial, sans-serif; }
header, footer { background: #003366; color: white; text-align:center; padding:1em; }
nav a { color: #f0f0f0; margin: 0 10px; text-decoration: none; }
.grid-container {
  display: grid;
  gap: 20px;
  padding: 20px;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
}
.card {
  background: #fff;
  border-radius: 10px;
  text-decoration: none;
  color: inherit;
  box-shadow: 0 4px 6px rgba(0,0,0,0.1);
  overflow: hidden;
  transition: transform .3s, box-shadow .3s;
}
.card:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 12px rgba(0,0,0,0.2);
}
.card-content {
  padding: 20px;
  text-align: center;
}
.card .icon {
  font-size: 3em;
  display: block;
  margin-bottom: 10px;
}
canvas {
  margin-top: 10px;
}