body { font-family: sans-serif; background: #f4f4f4; margin: 0; padding: 0; }
#loginPage { padding: 40px; background: #2e7d32; color: white; text-align: center; }
#app { padding: 20px; }
header { background: #388e3c; color: white; padding: 10px; display: flex; justify-content: space-between; }
nav { display: flex; gap: 10px; margin: 10px 0; }
nav button { padding: 10px; background: #ff6d00; color: white; border: none; cursor: pointer; }
section { display: none; }
section.active { display: block; }
form { margin-bottom: 15px; }
input, textarea { display: block; margin: 10px 0; width: 100%; padding: 10px; }
button { background: #2e7d32; color: white; border: none; padding: 10px; cursor: pointer; }