/* ==========================================================================
   Accessibility layer — WCAG 2.1 AA
   Skip link, keyboard focus indicators, screen-reader utilities,
   reduced-motion support. Loaded on every page via partials/header.ejs.
   ========================================================================== */

/* --- Screen-reader-only content (visually hidden, still announced) --- */
.sr-only {
    position: absolute !important;
    width: 1px !important;
    height: 1px !important;
    padding: 0 !important;
    margin: -1px !important;
    overflow: hidden !important;
    clip: rect(0, 0, 0, 0) !important;
    white-space: nowrap !important;
    border: 0 !important;
}

/* --- Skip link: first focusable element, jumps to main content --- */
.skip-link {
    position: absolute;
    top: -60px;
    left: 12px;
    z-index: 10000;
    padding: 12px 20px;
    background: #0062cc;
    color: #ffffff;
    font-weight: 600;
    font-size: 1rem;
    text-decoration: none;
    border-radius: 0 0 8px 8px;
    transition: top 0.15s ease-in-out;
}
.skip-link:focus {
    top: 0;
    outline: 3px solid #ffffff;
    outline-offset: 2px;
}

/* --- Visible keyboard focus indicator on every interactive element ---
   Uses :focus-visible so mouse users don't see it, keyboard users always do. */
a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible,
summary:focus-visible,
[tabindex]:focus-visible,
[role="button"]:focus-visible,
.nav-link:focus-visible,
.btn:focus-visible {
    outline: 3px solid #4d9fff;
    outline-offset: 2px;
    border-radius: 3px;
}

/* Fallback for browsers without :focus-visible support */
a:focus,
button:focus,
input:focus,
select:focus,
textarea:focus {
    outline: 3px solid #4d9fff;
    outline-offset: 2px;
}
/* Re-hide the fallback outline when :focus-visible is supported and not active */
@supports selector(:focus-visible) {
    a:focus:not(:focus-visible),
    button:focus:not(:focus-visible),
    input:focus:not(:focus-visible),
    select:focus:not(:focus-visible),
    textarea:focus:not(:focus-visible) {
        outline: none;
    }
}

/* Skip-link destination receives focus programmatically (tabindex="-1");
   the content itself is the cue, so suppress the ring around the whole region. */
#main-content:focus {
    outline: none;
}

/* --- Hamburger toggle as a real button: strip default button chrome --- */
button.nav-toggle {
    background: none;
    border: none;
    padding: 0;
    margin: 0;
    cursor: pointer;
    color: inherit;
    font: inherit;
}

/* --- Links inside running text must not rely on colour alone (WCAG 1.4.1) ---
   Underline bare content links; class-styled links (buttons, cards, CTAs) opt out. */
main a:not([class]),
.cookie-description a,
.impressum-content a,
.datenschutz-content a,
.agb-content a,
.footer-copyright a {
    text-decoration: underline !important;
}

/* --- Respect the user's reduced-motion preference --- */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.001ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.001ms !important;
        scroll-behavior: auto !important;
    }
}