/* Fixed Top Navigation Bar Styles */
.topbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: #0066cc;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
    z-index: 1000;
    height: 60px;
}

.topbar-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 100%;
}

.topbar-brand {
    color: white;
    font-size: 1.4em;
    font-weight: 700;
    text-decoration: none;
    transition: opacity 0.3s ease;
    white-space: nowrap;
}

.topbar-brand:hover {
    opacity: 0.9;
}

.topbar-menu {
    display: flex;
    list-style: none;
    margin: 0;
    padding: 0;
    gap: 0;
}

.topbar-item {
    margin: 0;
}

.topbar-link {
    display: block;
    color: white;
    text-decoration: none;
    padding: 20px 25px;
    font-weight: 600;
    font-size: 1em;
    transition: background-color 0.3s ease;
    white-space: nowrap;
    height: 60px;
    line-height: 20px;
}

.topbar-link:hover {
    background-color: #0052a3;
}

.topbar-link.active {
    background-color: #004080;
    border-bottom: 3px solid white;
}

/* Mobile Menu Toggle Button */
.topbar-toggle {
    display: none;
    background: none;
    border: none;
    color: white;
    font-size: 1.8em;
    cursor: pointer;
    padding: 8px 12px;
    transition: opacity 0.3s ease;
}

.topbar-toggle:hover {
    opacity: 0.8;
}

.hamburger-icon {
    display: block;
    line-height: 1;
}

/* Body padding to accommodate fixed topbar */
body.has-topbar {
    padding-top: 60px;
}

/* Mobile Responsive Styles */
@media (max-width: 768px) {
    .topbar-toggle {
        display: block;
    }

    .topbar-menu {
        position: absolute;
        top: 60px;
        left: 0;
        right: 0;
        background-color: #0066cc;
        flex-direction: column;
        gap: 0;
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.4s ease;
        box-shadow: 0 4px 8px rgba(0, 0, 0, 0.15);
    }

    .topbar-menu.active {
        max-height: 500px;
    }

    .topbar-link {
        padding: 16px 20px;
        border-top: 1px solid rgba(255, 255, 255, 0.1);
        height: auto;
    }

    .topbar-link.active {
        border-bottom: none;
        border-left: 4px solid white;
    }

    .topbar-brand {
        font-size: 1.2em;
    }
}

@media (max-width: 480px) {
    .topbar-brand {
        font-size: 1.1em;
    }

    .topbar-container {
        padding: 0 15px;
    }
}