body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f4f4f4;
    direction: rtl;
    text-align: right;
}
.container {
    width: 80%;
    margin: auto;
    overflow: hidden;
}
header {
    background: #35424a;
    color: #ffffff;
    padding-top: 30px;
    min-height: 70px;
    text-align: center;
}
header h1 {
    margin: 0;
    font-size: 24px;
}
#main {
    padding: 20px;
    background: #ffffff;
    margin-top: 20px;
}
.form-group {
    margin-bottom: 15px;
}
.form-group label {
    display: block;
    margin-bottom: 5px;
}
.form-group input, .form-group select {
    width: 100%;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 5px;
}
.form-group input[type="checkbox"] {
    width: auto;
}
.btn {
    display: inline-block;
    background: #e8491d;
    color: #ffffff;
    padding: 10px 20px;
    text-align: center;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 16px;
}
.btn:hover {
    background: #35424a;
}