body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
  background: #f5f5f5;
}
.container {
  max-width: 800px;
  margin: 0 auto;
  padding: 20px;
}
header {
  display: flex;
  gap: 10px;
  margin-bottom: 20px;
}
#searchInput { flex-grow: 1; padding: 10px; }
#categoryFilter { padding: 10px; }
form {
  display: flex;
  flex-direction: column;
  gap: 10px;
  background: #fff;
  padding: 20px;
  border-radius: 8px;
  box-shadow: 0 2px 5px rgba(0,0,0,0.1);
  margin-bottom: 20px;
}
input, textarea, select, button { padding: 10px; font-size: 16px; }
.notes-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 15px;
}
.note-card {
  padding: 15px;
  border-radius: 8px;
  box-shadow: 0 2px 5px rgba(0,0,0,0.1);
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.pinned {
  border: 2px solid #000;
}
.actions {
  margin-top: auto;
  display: flex;
  gap: 5px;
}
button {
  cursor: pointer;
  background: #007bff;
  color: #fff;
  border: none;
  border-radius: 4px;
}
button:hover { background: #0056b3; }