/* Base layout */
body {
    font-family: 'Segoe UI', sans-serif;
    margin: 0;
    background-color: #f9f9f9;
    color: #333;
}

header, footer {
    background-color: #004080;
    color: white;
    text-align: center;
    padding: 15px;
}

main {
    padding: 20px;
    max-width: 1000px;
    margin: auto;
}

section {
    margin-bottom: 30px;
    background-color: white;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 0 5px rgba(0,0,0,0.1);
}

h2, h3 {
    color: #004080;
    margin-top: 0;
}

ul {
    padding-left: 20px;
}

p.link-message {
    text-align: center;
    margin: 20px 0;
    font-style: italic;
}

/* Top navigation menu */
nav.top-menu {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 10px;
    background-color: #e0e0e0;
    padding: 10px;
}

nav.top-menu a {
    text-decoration: none;
    font-weight: bold;
    color: #004080;
    background-color: #e0f7fa;
    padding: 8px 12px;
    border-radius: 5px;
    flex: 1 1 auto;
    text-align: center;
    min-width: 120px;
}

nav.top-menu a.admin-link {
    background-color: #fff3cd;
}

nav.top-menu a.logout-link {
    background-color: #f8d7da;
}

/* Form controls */
select, button {
    margin: 10px 5px;
    padding: 8px;
    font-size: 16px;
    width: 100%;
    max-width: 300px;
    box-sizing: border-box;
}

/* Collapsible sections */
.collapsible {
    background-color: #004080;
    color: white;
    cursor: pointer;
    padding: 12px;
    width: 100%;
    border: none;
    text-align: left;
    outline: none;
    font-size: 16px;
    border-radius: 5px;
    margin-top: 10px;
}

.collapsible:hover {
    background-color: #003060;
}

.content {
    padding: 0 15px;
    display: none;
    overflow: hidden;
    background-color: #f1f1f1;
    border-radius: 5px;
    margin-bottom: 10px;
}
@media screen and (max-width: 768px) {
    nav.top-menu {
        flex-direction: column;
        align-items: stretch;
    }

    nav.top-menu a {
        width: 100%;
        text-align: left;
    }
}

/* Responsive behavior */
@media screen and (max-width: 768px) {
    nav.top-menu {
        flex-direction: column;
        align-items: stretch;
    }

    nav.top-menu a {
        width: 100%;
        text-align: left;
    }

    main {
        padding: 10px;
    }

    section {
        padding: 15px;
    }

    select, button {
        font-size: 14px;
        padding: 6px;
    }

    h2 {
        font-size: 1.4em;
    }

    h3 {
        font-size: 1.2em;
    }
}
.navbar {
    background-color: #e0e0e0;
    padding: 10px;
    position: relative;
}

.navbar .brand {
    font-weight: bold;
    font-size: 1.2em;
    color: #004080;
    text-align: center;
    margin-bottom: 10px;
}

.hamburger {
    display: none;
    background-color: #004080;
    color: white;
    font-size: 20px;
    border: none;
    padding: 10px;
    border-radius: 5px;
    cursor: pointer;
    width: 100%;
}

.nav-links {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 10px;
}

.nav-links a {
    text-decoration: none;
    font-weight: bold;
    color: #004080;
    background-color: #e0f7fa;
    padding: 8px 12px;
    border-radius: 5px;
    flex: 1 1 auto;
    text-align: center;
    min-width: 120px;
}

.admin-link {
    background-color: #fff3cd;
}

.logout-link {
    background-color: #f8d7da;
}

/* Responsive behavior */
@media screen and (max-width: 768px) {
    .hamburger {
        display: block;
    }

    .nav-links {
        display: none;
        flex-direction: column;
        align-items: stretch;
        margin-top: 10px;
    }

    .nav-links.show {
        display: flex;
    }

    .nav-links a {
        width: 100%;
        text-align: left;
    }
}