body {
    font-family: Arial, sans-serif;
    background: #f0f2f5;
    margin: 0;
    padding: 20px;
}
.container {
    max-width: 400px;
    margin: 40px auto;
    padding: 20px;
    background: white;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}
.form-group {
    margin-bottom: 15px;
}
.form-group label {
    display: block;
    margin-bottom: 5px;
    font-weight: bold;
}
.form-group input {
    width: 100%;
    padding: 8px;
    border: 1px solid #ddd;
    border-radius: 4px;
    box-sizing: border-box;
}
.btn {
    background: #1877f2;
    color: white;
    padding: 10px 20px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    width: 100%;
    font-size: 16px;
}
.btn:hover {
    background: #166fe5;
}
.error {
    color: red;
    margin-bottom: 15px;
}
.links {
    text-align: center;
    margin-top: 15px;
}
.links a {
    color: #1877f2;
    text-decoration: none;
    margin: 0 10px;
}
.links a:hover {
    text-decoration: underline;
}