body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
  background: #f9f9f9;
  color: #333;
}

header {
  background: #1a73e8;
  color: white;
  padding: 1rem;
  text-align: center;
}

nav a {
  color: #fff;
  margin: 0 10px;
  text-decoration: underline;
}

.hero {
  padding: 2rem;
  text-align: center;
  background: #e3f2fd;
}

.tool-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1rem;
  padding: 2rem;
}

.tool {
  background: white;
  padding: 1rem;
  text-align: center;
  border: 1px solid #ddd;
  border-radius: 8px;
  box-shadow: 0 2px 6px rgba(0,0,0,0.05);
}

.tool a {
  text-decoration: none;
  font-weight: bold;
  color: #1a73e8;
}

.adsense {
  margin: 2rem auto;
  text-align: center;
}

footer {
  text-align: center;
  padding: 1rem;
  background: #eee;
}