body {
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    margin: 0;
    background: linear-gradient(to bottom, rgb(60, 84, 139) 2%, rgb(45, 139, 190) 100%);
    font-family: 'Arial', sans-serif;
    color: #333;
}

.container {
    text-align: center;
    padding: 40px;
    border-radius: 10px;
    width: 100%;
    max-width: 400px;
}

.logo img {
    width: 100%;
    margin-bottom: 20px;
}

h1 {
    margin-bottom: 20px;
    font-size: 24px;
    color: #444;
}

.error-message, .logout-message {
    color: #e74c3c;
    margin-bottom: 20px;
    font-weight: bold;
}

form div {
    margin-bottom: 20px;
}

input[type="text"], input[type="password"] {
    width: 100%;
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: 5px;
    box-sizing: border-box;
    transition: border-color 0.3s ease;
}

input[type="text"]:focus, input[type="password"]:focus {
    border-color: #ff7e5f;
    outline: none;
}

input[type="submit"] {
    width: 100%;
    padding: 12px;
    background-color: #3b568d;
    border: none;
    border-radius: 5px;
    color: white;
    font-size: 16px;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

input[type="submit"]:hover {
    background-color: #8cafc3;
}

@media (max-width: 600px) {
    .container {
        padding: 20px;
    }

    .logo img {
        width: 100px;
    }

    h1 {
        font-size: 20px;
    }

    input[type="text"], input[type="password"], input[type="submit"] {
        font-size: 14px;
    }
}