header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: var(--dark);
    padding: 15px;
    z-index: 1000;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}

nav ul {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    justify-content: center;
}

nav ul li {
    margin: 0 20px;
    cursor: pointer;
    color: white;
    font-family: var(--font-mono);
    position: relative;
}

.nav-item { font-size: 1rem; }

nav ul li:hover,
nav ul li.active { color: var(--accent); }

.nav-item.courier-font a {
    color: white;
    text-decoration: none;
}

.nav-item.courier-font a:hover { color: var(--accent); }

.dropdown {
    display: none;
    position: absolute;
    background-color: var(--dark);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
    width: max-content;
    padding: 0.5rem 0;
    list-style: none;
    left: 50%;
    transform: translateX(-50%);
    top: 100%;
}

nav ul li:hover > .dropdown { display: block; }

.dropdown li {
    padding: 0.5rem 1rem;
    cursor: pointer;
    transition: color 0.2s;
    font-family: var(--font-mono);
    font-size: 0.8rem;
}

.dropdown li:hover { color: var(--accent); }

.mobile-nav-toggle {
    display: none;
    background: none;
    border: none;
    color: white;
    font-size: 1.5rem;
    cursor: pointer;
}

footer {
    text-align: center;
    padding: 0 10px;
    background-color: var(--dark);
    color: white;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: 50px;
    display: flex;
    justify-content: center;
    align-items: center;
}

.footer-content { width: 100%; display: flex; flex-direction: column; align-items: center; gap: 0; }
.footer-column   { display: flex; justify-content: center; }
.social-links    { display: flex; align-items: center; }

.footer-content p {
    margin: 0;
    font-size: 0.9rem;
    font-family: var(--font-mono);
}

.social-link,
.has-popover {
    display: inline-block;
    color: inherit;
    text-decoration: none;
    cursor: pointer;
    padding: 4px 10px 0px;
}

.icon-fa {
    font-size: 1rem;
    color: white;
    transition: color 0.3s ease;
    line-height: 1;
}

.social-link:hover .icon-fa,
.has-popover:hover .icon-fa { color: var(--accent); }

.has-popover { position: relative; }

.popover-text {
    visibility: hidden;
    opacity: 0;
    width: 200px;
    background-color: #333;
    color: #fff;
    text-align: center;
    border-radius: 6px;
    padding: 8px;
    position: absolute;
    z-index: 1;
    bottom: 125%;
    left: 50%;
    transform: translateX(-50%);
    transition: opacity 0.3s ease, visibility 0.3s ease;
    white-space: nowrap;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
    font-family: var(--font-mono);
    font-size: 0.85rem;
}

.popover-text::after {
    content: '';
    position: absolute;
    top: 100%;
    left: 50%;
    margin-left: -5px;
    border-width: 5px;
    border-style: solid;
    border-color: #333 transparent transparent transparent;
}

.has-popover:hover .popover-text { visibility: visible; opacity: 1; bottom: 130%; }

.side-panel {
    position: fixed;
    left: 0;
    top: 0;
    height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    width: 44px;
    overflow: hidden;
    background: var(--dark);
    border-right: 1px solid var(--dark-border);
    z-index: 1001;
    transition: width 0.2s ease;
}

.side-panel.expanded { width: 180px; }

.side-panel-toggle {
    background: none;
    border: none;
    color: var(--white);
    font-family: var(--font-mono);
    font-size: 1.3rem;
    cursor: pointer;
    padding: 0;
    width: 44px;
    height: var(--header-height, 50px);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    line-height: 1;
}

.side-panel-toggle:hover { color: var(--accent); }

.side-panel-item {
    display: flex;
    align-items: center;
    gap: 8px;
    text-decoration: none;
    color: var(--white);
    padding: 8px;
    white-space: nowrap;
    width: 100%;
}

.side-panel-item:hover .side-panel-label { color: var(--accent); }

.side-panel-icon {
    flex-shrink: 0;
    display: flex;
    align-items: center;
    width: 28px;
}

.side-panel-label {
    font-family: var(--font-mono);
    font-size: 1rem;
    opacity: 0;
    transition: opacity 0.15s ease;
    pointer-events: none;
}

.side-panel.expanded .side-panel-label {
    opacity: 1;
    pointer-events: auto;
}

.side-panel-label--active { color: var(--accent) !important; }

.side-panel-logout-sub {
    padding-left: calc(44px + 2ch);
    padding-bottom: 6px;
    font-family: var(--font-mono);
    font-size: 1rem;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.15s ease;
}

.side-panel.expanded .side-panel-logout-sub {
    opacity: 1;
    pointer-events: auto;
}

.side-panel-logout-link { color: var(--white); text-decoration: none; }
.side-panel-logout-link:hover { color: var(--accent); }

@media (max-width: 768px) {
    .mobile-nav-toggle { display: block; }

    nav ul {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background-color: var(--dark);
        padding: 0 0 1rem;
        max-height: calc(100vh - var(--header-height, 60px) - var(--footer-height, 77px));
        overflow-y: auto;
        -webkit-overflow-scrolling: touch;
        z-index: 999;
    }

    nav ul.active { display: flex; }

    nav ul li {
        margin: 0;
        padding: 0.5rem 1rem;
        text-align: center;
        font-size: 1.2rem;
    }

    nav ul li.nav-item { padding: 0; }

    .nav-item.courier-font a {
        display: block;
        padding: 0.5rem 1rem;
        text-align: center;
    }

    .dropdown {
        position: static;
        display: block !important;
        width: 100%;
        box-shadow: none;
        padding: 0;
        background-color: transparent;
    }

    .dropdown li {
        padding: 0.3rem 1rem;
        text-align: center;
        font-size: 0.9rem;
        color: rgba(255, 255, 255, 0.75);
    }

    .side-panel { display: none; }
    body, body.side-expanded { padding-left: 0; }
}