body{margin:0;font-family:sans-serif;line-height:1.6}.app-header{background-color:#f8f9fa;padding:10px 20px;display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid #dee2e6}.app-header h1 a{color:#333;text-decoration:none}.app-header nav a{color:#007bff;text-decoration:none}.app-header nav a:hover{text-decoration:underline}.app-main{padding:20px;min-height:calc(100vh - 120px)}.app-footer{background-color:#f8f9fa;padding:10px 20px;text-align:center;border-top:1px solid #dee2e6;font-size:.9em;color:#6c757d}.form-container{max-width:500px;margin:20px auto;padding:20px;border:1px solid #ccc;border-radius:8px;background-color:#fff}.form-container h2{text-align:center;margin-bottom:20px}.form-group{margin-bottom:15px}.form-group label{display:block;margin-bottom:5px;font-weight:700}.form-group input[type=text],.form-group input[type=email],.form-group input[type=password],.form-group input[type=tel],.form-group input[type=date]{width:100%;padding:10px;border:1px solid #ccc;border-radius:4px;box-sizing:border-box}.form-button{width:100%;padding:12px;background-color:#007bff;color:#fff;border:none;border-radius:4px;cursor:pointer;font-size:1em;transition:background-color .2s ease}.form-button:hover{background-color:#0056b3}.form-button:disabled{background-color:#ccc;cursor:not-allowed}.error-message{color:red;font-size:.9em;margin-top:5px}.success-message{color:green;font-size:.9em;margin-top:10px;text-align:center}.logout-button{background:none;border:1px solid #dc3545;color:#dc3545;padding:5px 10px;border-radius:4px;cursor:pointer;font-size:.9em}.logout-button:hover{background-color:#dc3545;color:#fff}@media (max-width: 600px){.form-container{padding:15px;margin:10px}.app-main{padding:10px}.app-header{padding:10px;flex-direction:column;align-items:flex-start}.app-header nav{margin-top:10px}}.admin-action-button{display:inline-block;padding:10px 18px;color:#fff!important;text-decoration:none;border-radius:5px;font-size:.95em;cursor:pointer;border:none;transition:background-color .2s ease;text-align:center}.create-lecture-button{background-color:#28a745}.create-lecture-button:hover{background-color:#218838}.view-lecture-button{background-color:#17a2b8}.view-lecture-button:hover{background-color:#138496}.logout-admin-button{background-color:#dc3545}.logout-admin-button:hover{background-color:#c82333}.record-description-content{word-wrap:break-word}