body {
    font-family: Arial, sans-serif;
    margin: 0;
    background: #f8f9fa;
    color: #222;
}

header {
    background: #142d4e;
    color: white;
    padding: 20px 40px;
}

header h1 {
    margin: 0 0 15px;
}

nav {
    display: flex;
    gap: 25px;
}

nav a {
    color: white;
    text-decoration: none;
}

nav a:hover {
    text-decoration: underline;
}

main {
    max-width: 1100px;
    margin: 40px auto;
    padding: 0 20px;
    min-height: 60vh;
}

footer {
    background: #142d4e;
    color: white;
    text-align: center;
    padding: 20px;
}

/* Navigation links */

nav a {
    padding: 8px 14px;
    border-radius: 5px;
}

/* Highlight selected tab */

nav a.active {
    background: white;
    color: #142d4e;
    font-weight: bold;
}

/* Hover effect */

nav a:hover {
    background: rgba(255, 255, 255, 0.2);
}

/* Keep selected tab highlighted on hover */

nav a.active:hover {
    background: white;
    color: #142d4e;
}

/* Download confirmation dialog */

#download-dialog {
    border: none;
    border-radius: 10px;
    padding: 25px 35px;
    max-width: 400px;
    width: 80%;
    text-align: center;
    box-shadow: 0 5px 25px rgba(0, 0, 0, 0.25);
}

#download-dialog::backdrop {
    background: rgba(0, 0, 0, 0.25);
}

#download-dialog h3 {
    color: #142d4e;
    margin-top: 0;
    font-size: 22px;
}

#download-dialog p {
    font-size: 16px;
}

#download-dialog .download-note {
    font-size: 13px;
    color: #777;
}