body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
  background: #f9fafb;
  color: #333;
}
header {
  background: #4f46e5;
  color: white;
  padding: 2rem;
  text-align: center;
}
header h1 {
  margin: 0;
  font-size: 2.5rem;
}
main {
  max-width: 800px;
  margin: 2rem auto;
  padding: 1rem;
}
.tool {
  background: white;
  padding: 1rem 1.5rem;
  margin-bottom: 1.5rem;
  border-radius: 10px;
  box-shadow: 0 4px 10px rgba(0,0,0,0.05);
}
.tool h2 {
  margin-top: 0;
}
.tool input, .tool textarea {
  width: 100%;
  margin: 0.5rem 0;
  padding: 0.5rem;
  border: 1px solid #ddd;
  border-radius: 5px;
}
.tool button {
  background: #4f46e5;
  color: white;
  border: none;
  padding: 0.5rem 1rem;
  border-radius: 5px;
  cursor: pointer;
}
.tool button:hover {
  background: #4338ca;
}
.output {
  margin-top: 0.5rem;
  font-weight: bold;
  color: #111;
}
footer {
  text-align: center;
  padding: 1rem;
  background: #f3f4f6;
  margin-top: 2rem;
}