#bak-rechner-formular{max-width:400px;margin:20px auto;padding:20px;border:1px solid #ddd;border-radius:8px;box-shadow:0 4px 8px rgba(0,0,0,.05);background-color:#fff;font-family:Arial,sans-serif}#bak-rechner-formular h2{text-align:center;color:#0073aa;border-bottom:2px solid #0073aa;padding-bottom:10px;margin-bottom:20px;font-size:1.5em}#bak-form label{display:block;margin-top:15px;margin-bottom:5px;font-weight:600;color:#333}#bak-form input[type=number],#bak-form select{width:100%;padding:10px;border:1px solid #ccc;border-radius:4px;box-sizing:border-box;font-size:1em}#bak-form small{display:block;color:#777;margin-top:-5px;margin-bottom:10px;font-size:.85em}#bak-form button[type=submit]{display:block;width:100%;padding:12px;background-color:#4caf50;color:#fff;border:none;border-radius:4px;cursor:pointer;font-size:1.1em;font-weight:700;margin-top:25px;transition:background-color .3s ease}#bak-form button[type=submit]:hover{background-color:#45a049}#bak-ergebnis{margin-top:30px;padding:20px;border:2px solid #e0e0e0;border-radius:8px;text-align:center;background-color:#f0f8ff}#bak-wert{display:block;font-size:2.5em;font-weight:900;color:#d32f2f;margin:10px 0}