/* Global styles */
body {
  margin: 0;
  font-family: Arial, sans-serif;
  background: #f9f9f9;
}

.container {
  max-width: 900px;
  margin: 0 auto;
  padding: 20px;
}

nav {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 20px;
}

nav a {
  background: #007bff;
  color: #fff;
  padding: 8px 12px;
  text-decoration: none;
  border-radius: 4px;
}

nav a:hover {
  background: #0056b3;
}

form {
  margin-top: 20px;
}

button {
  background: #28a745;
  color: #fff;
  border: none;
  padding: 8px 16px;
  border-radius: 4px;
  cursor: pointer;
}

button:hover {
  background: #218838;
}

canvas {
  border: 1px solid #333;
  margin-bottom: 10px;
  max-width: 100%;
}

@media (max-width: 600px) {
  nav {
    flex-direction: column;
  }
}

/* Pipe type button styles */
.pipe-buttons {
  margin: 10px 0;
}

.pipe-buttons button {
  background: #6c757d;
  margin-right: 5px;
}

.pipe-buttons button.active {
  background: #007bff;
}