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, .admin-container, .control-container {
    background: white;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
    width: 90%;
    max-width: 400px;
    text-align: center;
}

/* button {
    padding: 10px 15px;
    background: #007BFF;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    margin-top: 10px;
    transition: background-color 0.3s, transform 0.2s;
}
*/

button:hover {
    background: #0056b3;
    transform: translateY(-3px);
}

button:active {
    background: #003d80;
    transform: translateY(0);
}

input[type="text"], input[type="password"], input[type="datetime-local"], select {
    width: calc(100% - 20px);
    padding: 10px;
    margin: 10px 0;
    border: 1px solid #ccc;
    border-radius: 5px;
    box-sizing: border-box;
}

.error-message {
    color: red;
    font-size: 14px;
    display: none;
    margin-top: 10px;
}

.success-message {
    color: green;
    font-size: 14px;
    display: none;
    margin-top: 10px;
}


.system-version {
    position: fixed;
    bottom: 10px;
    right: 10px;
    background-color: rgba(0, 0, 0, 0.7);
    color: #fff;
    padding: 5px 10px;
    border-radius: 5px;
    font-size: 12px;
    font-family: Arial, sans-serif;
    z-index: 1000;
}