body {
    font-family: 'Arial', sans-serif;
    background: #f5f5f5;
    margin: 0;
}
.main-header {
    background: #4CAF50;
    color: white;
    padding: 10px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.main-header a {
    color: white;
    margin: 0 10px;
    text-decoration: none;
}
.main-header .btn {
    background: #2196F3;
    padding: 6px 12px;
    border-radius: 4px;
}
.main-header .btn-outline {
    background: none;
    border: 1px solid white;
}
.form-container {
    max-width: 400px;
    margin: 50px auto;
    background: white;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 6px rgba(0,0,0,0.1);
}
.form-container h1 {
    text-align: center;
}
.form-container input, .form-container button {
    width: 100%;
    padding: 10px;
    margin: 10px 0;
}
.form-container button {
    background: #4CAF50;
    color: white;
    border: none;
    cursor: pointer;
}
.form-container button:hover {
    background: #45a049;
}
.error {
    color: red;
    text-align: center;
}