body {
    font-family: Arial, sans-serif;
    background-color: #f4f4f9;
    margin: 0;
    padding: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
}

.login-container, .dashboard-container {
    background: #fff;
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
    width: 100%;
    max-width: 400px;
}

h2 {
    text-align: center;
    color: #333;
    margin-bottom: 20px;
}

.error {
    color: #d9534f;
    background-color: #f2dede;
    padding: 10px;
    border-radius: 4px;
    margin-bottom: 15px;
    text-align: center;
}

.form-group {
    margin-bottom: 15px;
}

label {
    display: block;
    margin-bottom: 5px;
    color: #555;
}

input {
    width: 100%;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 4px;
    box-sizing: border-box;
}

.login-btn {
    width: 100%;
    padding: 10px;
    background-color: #5cb85c;
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 16px;
}

.login-btn:hover {
    background-color: #4cae4c;
}

.dashboard-menu {
    margin-top: 20px;
}

.menu-item {
    display: block;
    padding: 10px;
    margin-bottom: 10px;
    background-color: #337ab7;
    color: white;
    text-decoration: none;
    text-align: center;
    border-radius: 4px;
}

.menu-item:hover {
    background-color: #286090;
}