body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
}

/* Header Title */
header {
    background-color: #4CAF50; /* Green background */
    color: white;
    padding: 20px;
    text-align: center;
}

/* Navigation Bar */
nav {
    display: flex;
    justify-content: center;
    background-color: #333; /* Dark gray */
}

nav a {
    color: white;
    padding: 14px 20px;
    text-decoration: none;
    text-align: center;
}

nav a:hover {
    background-color: #ddd;
    color: black;
}

/* Content Section */
.content {
    padding: 20px;
    line-height: 1.6;
    text-align: justify;
    color: #333;
    margin-left: 15%;
    margin-right: 15%;
}

/* Introduction */
.Intro{
    display: flex; /* Flexbox for just the h1 */
    justify-content: center; /* Center horizontally */
}

#copyright {
    padding: 20px;
    line-height: 1.6;
    text-align: center;
    color: #333;
    margin-left: 15%;
    margin-right: 15%;
}

/* Responsive Design */
@media (max-width: 600px) {
    nav a {
        padding: 10px;
        font-size: 14px;
    }

    header {
        font-size: 20px;
    }
}

table {
    border-collapse: collapse;
    width: 100%;
    box-shadow: 10px 10px 5px #888888;
}
th, td {
    border: 1px solid black;
    padding: 8px;
    text-align: center;
}
th {
    background-color: #f2f2f2;
}

#loadingOverlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(255, 255, 255, 0.9);
    display: none; /* hidden by default */
    justify-content: center;
    align-items: center;
    flex-direction: column;
    z-index: 9999;
}

.spinner {
    border: 6px solid #f3f3f3;
    border-top: 6px solid #333;
    border-radius: 50%;
    width: 50px;
    height: 50px;
    animation: spin 1s linear infinite;
    margin-bottom: 10px;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}