:root {
    --a11y-font-scale: 100%;
    --a11y-highlight: #ffbf47;
    --a11y-dropdown-bg: #ffffff;
    --a11y-dropdown-text: #0f172a;
    --a11y-dropdown-shadow: 0 12px 30px rgba(5, 36, 87, 0.18);
}

html {
    font-size: var(--a11y-font-scale, 100%);
}

.a11y-skip-container {
    position: relative;
    z-index: 1000;
}

.a11y-skip-link {
    position: absolute;
    left: 1rem;
    top: 0.5rem;
    padding: 0.5rem 1rem;
    background: #111827;
    color: #ffffff;
    text-decoration: none;
    transform: translateY(-150%);
    transition: transform 0.2s ease;
    border-radius: 6px;
    font-weight: 600;
}

.a11y-skip-link:focus,
.a11y-skip-link:focus-visible {
    transform: translateY(0);
}

.a11y-hidden {
    display: none !important;
}

:focus-visible {
    outline: 3px solid var(--a11y-highlight);
    outline-offset: 3px;
}

body.a11y-contraste,
body.a11y-contraste main,
body.a11y-contraste section {
    background-color: #000 !important;
    color: #fff !important;
}

body.a11y-contraste a {
    color: #ffe600 !important;
}

body.a11y-contraste .card,
body.a11y-contraste .table,
body.a11y-contraste .list-group-item,
body.a11y-contraste .navbar,
body.a11y-contraste .topbar,
body.a11y-contraste .hero-band,
body.a11y-contraste .primary-nav-bar,
body.a11y-contraste .main-footer {
    background-color: #000 !important;
    color: #fff !important;
    border-color: #fff !important;
}

body.a11y-contraste .btn,
body.a11y-contraste .form-control,
body.a11y-contraste .form-select {
    background-color: #000 !important;
    color: #fff !important;
    border-color: #fff !important;
}

body.a11y-contraste img {
    filter: brightness(0.85) contrast(1.25);
}

.topbar-a11y-dropdown {
    position: relative;
}

.a11y-nav-toggle {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.3rem 1rem;
    border-radius: 999px;
    border: 1px solid rgba(255, 255, 255, 0.5);
    background: rgba(255, 255, 255, 0.08);
    color: #ffffff;
    font-size: 0.85rem;
    font-weight: 600;
    line-height: 1.4;
    transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.a11y-nav-toggle:hover,
.a11y-nav-toggle:focus-visible,
.topbar-a11y-dropdown.is-open .a11y-nav-toggle {
    background-color: #ffffff;
    color: var(--a11y-dropdown-text);
    border-color: transparent;
}

.a11y-nav-toggle .a11y-icon {
    font-size: 1rem;
    line-height: 1;
}

.a11y-nav-menu {
    position: absolute;
    right: 0;
    top: calc(100% + 0.5rem);
    min-width: 210px;
    background: var(--a11y-dropdown-bg);
    color: var(--a11y-dropdown-text);
    border-radius: 0.9rem;
    padding: 0.45rem 0;
    box-shadow: var(--a11y-dropdown-shadow);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-5px);
    transition: opacity 0.18s ease, transform 0.18s ease;
    z-index: 1200;
}

.topbar-a11y-dropdown.is-open .a11y-nav-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.a11y-nav-menu [role="menuitem"] {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    width: 100%;
    padding: 0.5rem 1rem;
    background: transparent;
    border: none;
    color: inherit;
    text-decoration: none;
    font-size: 0.9rem;
    cursor: pointer;
    transition: background-color 0.15s ease, color 0.15s ease;
}

.a11y-nav-menu [role="menuitem"]:hover,
.a11y-nav-menu [role="menuitem"]:focus-visible {
    background-color: rgba(15, 23, 42, 0.08);
    color: #0a3a8b;
}

.a11y-nav-menu button {
    text-align: left;
}

.a11y-nav-menu .icon {
    font-size: 1rem;
    line-height: 1;
}

@media (max-width: 992px) {
    .topbar .container {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.75rem;
    }

    .topbar-a11y-dropdown {
        width: 100%;
    }

    .a11y-nav-menu {
        right: auto;
        left: 0;
    }
}