body {
  margin: 0;
  font-family: sans-serif;
  background: #f9f9f9;
  text-align: center;
  color: #333;
}

header {
  background: #2c3e50;
  color: white;
  padding: 2rem;
}

.tools {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1rem;
  padding: 2rem;
}

.tool {
  background: white;
  border-radius: 10px;
  padding: 1.5rem;
  text-decoration: none;
  font-size: 1.2rem;
  color: #2c3e50;
  box-shadow: 0 4px 8px rgba(0,0,0,0.1);
  transition: transform 0.2s;
}
.tool:hover {
  transform: scale(1.05);
}

footer {
  padding: 1rem;
  background: #ecf0f1;
  margin-top: 2rem;
}