body.dark-theme { background: #121212; color: #e0e0e0; font-family: sans-serif; margin: 0; }
.navbar { background: #1f1f1f; padding: 15px 30px; display: flex; justify-content: space-between; border-bottom: 2px solid #333; }
.navbar a { color: #aaa; text-decoration: none; margin-left: 20px; }
.navbar a.gear { font-size: 20px; }
.content { padding: 40px; }
.card { background: #1e1e1e; padding: 25px; border-radius: 8px; border: 1px solid #333; }
input, select, button { padding: 10px; margin: 5px; background: #2c2c2c; border: 1px solid #444; color: white; border-radius: 4px; }
button { background: #007bff; cursor: pointer; }
table { width: 100%; margin-top: 20px; border-collapse: collapse; }
th, td { padding: 12px; border-bottom: 1px solid #333; text-align: left; }
.alert { background: #d32f2f; color: white; padding: 10px; margin-bottom: 20px; border-radius: 4px; }