.site-header {
    background-color: var(--nav-bg);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.nav-container {
    width: 100%;
    margin: 0;
    padding: 0 3rem;
    display: flex;
    align-items: center;
    height: 4.5rem;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--text-color);
    text-decoration: none;
    margin-right: 2.5rem;
    white-space: nowrap;
}

.nav-logo {
    height: 3.5rem;
    width: auto;
    display: block;
}

.nav-list {
    display: flex;
    list-style: none;
    gap: 0.5rem;
    align-items: center;
    margin-left: auto;
}

.nav-item {
    position: relative;
}

.nav-link, .dropdown-btn {
    display: flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.5rem 0.85rem;
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--muted-color);
    text-decoration: none;
    border: none;
    background: none;
    font-family: inherit;
    cursor: pointer;
    border-radius: 0.375rem;
    transition: all 0.15s ease-in-out;
}

.nav-link:hover, .dropdown-btn:hover {
    color: var(--text-color);
    background-color: #f3f4f6;
}

.caret {
    width: 0.75rem;
    height: 0.75rem;
    fill: currentColor;
    transition: transform 0.2s ease;
}

.nav-item.active .caret {
    transform: rotate(180deg);
}

.dropdown-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    margin-top: 0.25rem;
    min-width: 12rem;
    background-color: #ffffff;
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    padding: 0.5rem 0;
    list-style: none;
    z-index: 1010;
}

.nav-item.active .dropdown-menu {
    display: block;
}

.dropdown-item a {
    display: block;
    padding: 0.5rem 1rem;
    font-size: 0.9rem;
    color: var(--muted-color);
    text-decoration: none;
    transition: background 0.15s ease;
}

.dropdown-item a:hover {
    color: var(--accent-color);
    background-color: #f0f9ff;
}

.site-footer {
    border-top: 1px solid var(--border-color);
    padding: 1.75rem 3rem;
    background-color: #ffffff;
}

.footer-content {
    width: 100%;
    margin: 0;
    font-size: 0.875rem;
    color: var(--muted-color);
    text-align: right;
}