body {
  margin: 0;
  font-family: Arial, sans-serif;
  background: #f3f4f6;
  color: #111827;
  transition: background 0.3s ease, color 0.3s ease;
}

header {
  background: #111827;
  color: white;
  text-align: center;
  padding: 40px 20px;
}

header h1 {
  margin: 0;
  font-size: 42px;
}

header p {
  margin-top: 10px;
  color: #d1d5db;
}

#darkModeBtn {
  margin-top: 20px;
  background: white;
  color: #111827;
  border: none;
  padding: 10px 16px;
  border-radius: 8px;
  cursor: pointer;
  font-weight: bold;
}

.search-section {
  text-align: center;
  margin: 30px;
}

#searchInput {
  width: 80%;
  max-width: 500px;
  padding: 12px;
  border-radius: 10px;
  border: 1px solid #ccc;
  font-size: 16px;
}

.prompt-container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
  padding: 20px;
}

.category-title {
  grid-column: 1 / -1;
  margin: 10px 0;
  color: #374151;
  font-size: 24px;
}

.prompt-card {
  background: white;
  padding: 20px;
  border-radius: 14px;
  box-shadow: 0 2px 10px rgba(0,0,0,0.08);
  transition: transform 0.2s ease;
}

.prompt-card:hover {
  transform: translateY(-5px);
}

.prompt-card h2 {
  margin-top: 0;
}

button {
  background: #111827;
  color: white;
  border: none;
  padding: 10px 14px;
  border-radius: 8px;
  cursor: pointer;
  margin-top: 10px;
}

button:hover {
  opacity: 0.9;
}

footer {
  text-align: center;
  padding: 20px;
  color: #6b7280;
}

.dark-mode {
  background: #111827;
  color: white;
}

.dark-mode .prompt-card {
  background: #1f2937;
  color: white;
}

.dark-mode #searchInput {
  background: #374151;
  color: white;
  border: none;
}

.dark-mode .category-title {
  color: #f3f4f6;
}

.dark-mode footer {
  color: #d1d5db;
}