body {
    font-family: 'IRANSans', sans-serif;
    background-color: #f8f9fa;
}

h1, h3 {
    text-align: center;
}

.sidebar .sidebar-content {
    background-color: #f7f7f7;
}

.stButton > button {
    background-color: #4CAF50;
    color: white;
    border-radius: 10px;
}

.stButton > button:hover {
    background-color: #45a049;
}