body {
  font-family: Arial, sans-serif;
  margin: 0;
  background: #f8f8f8;
  color: #333;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

header {
  text-align: center;
  padding: 2rem;
  background: #ffffff;
  box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.tool-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1.5rem;
  padding: 2rem;
}

.tool-card {
  background: #ffffff;
  border-radius: 8px;
  padding: 1.5rem;
  box-shadow: 0 2px 6px rgba(0,0,0,0.1);
  text-align: center;
}

.tool-card a {
  display: inline-block;
  margin-top: 0.5rem;
  padding: 0.5rem 1rem;
  background: #0077ff;
  color: white;
  border-radius: 4px;
  text-decoration: none;
}

footer {
  text-align: center;
  padding: 1rem;
  font-size: 0.9rem;
  background: #ffffff;
  margin-top: auto;
}