/* Modiva A11y Widget — Accessibility Settings Panel
 * ADR-0076 — Saule 1, BFSG-Paket
 * No external fonts, no CDN. First-party only.
 */

/* ── CSS-Klassen auf <html> ──────────────────────────────────────────── */
html.a11y-font-115 { font-size: 115%; }
html.a11y-font-130 { font-size: 130%; }

html.a11y-contrast {
    filter: contrast(1.5);
    background: #000 !important;
    color: #fff !important;
}
html.a11y-contrast * {
    background-color: #000 !important;
    color: #fff !important;
    border-color: #fff !important;
}

html.a11y-grayscale {
    filter: grayscale(1);
}

html.a11y-no-motion *,
html.a11y-no-motion *::before,
html.a11y-no-motion *::after {
    animation: none !important;
    transition: none !important;
}

html.a11y-readable-font,
html.a11y-readable-font * {
    font-family: Arial, Helvetica, sans-serif !important;
    font-style: normal !important;
    letter-spacing: 0.05em !important;
    word-spacing: 0.1em !important;
    line-height: 1.6 !important;
}

html.a11y-links a {
    text-decoration: underline !important;
    outline: 2px solid currentColor !important;
    outline-offset: 2px !important;
}

/* ── Widget-Optik (4.0.24.0, BUG-9): konsumiert Theme-Akzent ──────────────
 * Akzent kaskadiert ueber beide Theme-Konventionen (--c-* / --color-*) mit
 * Modiva-Violett als Fallback. Funktions-Klassen oben bleiben unveraendert.
 * Fokus-Ringe bleiben kraeftig (WCAG) — im Kontrast-Modus weiter grellgelb.
 */

/* ── Widget: Floating Button ─────────────────────────────────────────── */
#modiva-a11y-btn {
    --a11y-accent: var(--c-primary, var(--color-primary, var(--c-accent, var(--color-accent, #7c5cff))));
    position: fixed;
    bottom: 1.5rem;
    left: 1.5rem;
    z-index: 99998;
    width: 3.25rem;
    height: 3.25rem;
    border-radius: 50%;
    border: none;
    background: var(--a11y-accent);
    color: #fff;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 6px 20px rgba(0,0,0,.22);
    padding: 0;
    font-size: 1.4rem;
    line-height: 1;
    font-family: var(--font, system-ui, sans-serif);
    transition: transform .15s ease, box-shadow .2s ease;
}
#modiva-a11y-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 28px rgba(0,0,0,.28);
}
#modiva-a11y-btn:active { transform: scale(.96); }
#modiva-a11y-btn svg {
    width: 1.65rem;
    height: 1.65rem;
    display: block;
}
#modiva-a11y-btn:focus-visible {
    outline: 3px solid var(--a11y-accent);
    outline-offset: 3px;
}

/* ── Widget: Panel ───────────────────────────────────────────────────── */
#modiva-a11y-panel {
    --a11y-accent: var(--c-primary, var(--color-primary, var(--c-accent, var(--color-accent, #7c5cff))));
    --a11y-surface: #fff;
    --a11y-fg: #1b1f3b;
    --a11y-muted: #5b6087;
    --a11y-border: rgba(20,22,48,.1);
    --a11y-accent-soft: color-mix(in srgb, var(--a11y-accent) 12%, transparent);
    position: fixed;
    bottom: 5.75rem;
    left: 1.5rem;
    z-index: 99999;
    width: 19rem;
    max-width: calc(100vw - 3rem);
    max-height: 80vh;
    overflow-y: auto;
    background: var(--a11y-surface);
    color: var(--a11y-fg);
    border: 1px solid var(--a11y-border);
    border-radius: 16px;
    padding: 1.1rem 1.2rem;
    font-family: var(--font, system-ui, -apple-system, sans-serif);
    font-size: 0.9rem;
    line-height: 1.5;
    box-shadow: 0 12px 40px rgba(0,0,0,.18);
}
#modiva-a11y-panel[hidden] { display: none; }

#modiva-a11y-panel h2 {
    margin: 0 0 .85rem;
    font-size: 1.02rem;
    font-weight: 600;
    color: var(--a11y-fg);
    border-bottom: 1px solid var(--a11y-border);
    padding-bottom: .6rem;
}

/* ── Panel: Options (Toggle-Switches, 4.0.27.0) ──────────────────────── */
.modiva-a11y-option {
    padding: .35rem 0;
    border-bottom: 1px solid var(--a11y-border);
}
.modiva-a11y-option:last-child { border-bottom: none; }

.modiva-a11y-toggle {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: .75rem;
    cursor: pointer;
    padding: .25rem 0;
}
.modiva-a11y-toggle-text {
    flex: 1;
    font-size: .875rem;
    color: var(--a11y-fg);
}
/* Echte Checkbox: visuell versteckt, aber fokussierbar + screenreaderbar. */
.modiva-a11y-toggle-input {
    position: absolute;
    width: 1px; height: 1px;
    margin: -1px; padding: 0; border: 0;
    overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap;
}
.modiva-a11y-switch {
    flex-shrink: 0;
    position: relative;
    width: 2.5rem;
    height: 1.4rem;
    border-radius: 999px;
    background: var(--a11y-border);
    transition: background .18s ease;
}
.modiva-a11y-switch::after {
    content: '';
    position: absolute;
    top: 2px; left: 2px;
    width: calc(1.4rem - 4px);
    height: calc(1.4rem - 4px);
    border-radius: 50%;
    background: #fff;
    box-shadow: 0 1px 3px rgba(0,0,0,.3);
    transition: transform .18s ease;
}
.modiva-a11y-toggle-input:checked + .modiva-a11y-switch {
    background: var(--a11y-accent);
}
.modiva-a11y-toggle-input:checked + .modiva-a11y-switch::after {
    transform: translateX(calc(2.5rem - 1.4rem));
}
.modiva-a11y-toggle-input:focus-visible + .modiva-a11y-switch {
    outline: 2px solid var(--a11y-accent);
    outline-offset: 2px;
}

/* ── Font-size radio group ───────────────────────────────────────────── */
.modiva-a11y-font-group {
    display: flex;
    gap: .4rem;
    flex-wrap: wrap;
    padding: .55rem 0;
    border-bottom: 1px solid var(--a11y-border);
}
.modiva-a11y-font-group legend {
    font-size: .875rem;
    color: var(--a11y-fg);
    margin-bottom: .4rem;
    width: 100%;
    font-weight: 500;
}
.modiva-a11y-font-group label {
    display: flex;
    align-items: center;
    gap: .25rem;
    font-size: .8rem;
    cursor: pointer;
    padding: .25rem .6rem;
    border: 1px solid var(--a11y-border);
    border-radius: 8px;
    transition: border-color .15s ease, background .15s ease;
}
.modiva-a11y-font-group label:has(input:checked) {
    border-color: var(--a11y-accent);
    background: var(--a11y-accent-soft);
}
.modiva-a11y-font-group input[type=radio] {
    accent-color: var(--a11y-accent);
}

/* ── TTS button row ──────────────────────────────────────────────────── */
.modiva-a11y-tts-row {
    display: flex;
    gap: .4rem;
    padding: .55rem 0;
}
.modiva-a11y-tts-btn {
    flex: 1;
    padding: .45rem .6rem;
    border: 1px solid var(--a11y-accent);
    border-radius: 10px;
    background: var(--a11y-accent);
    color: #fff;
    font-size: .8rem;
    cursor: pointer;
    font-family: inherit;
    transition: opacity .2s ease, transform .12s ease;
}
.modiva-a11y-tts-btn:hover { opacity: .92; }
.modiva-a11y-tts-btn:active { transform: scale(.97); }
.modiva-a11y-tts-btn:focus-visible {
    outline: 2px solid var(--a11y-accent);
    outline-offset: 2px;
}
.modiva-a11y-tts-btn.secondary {
    background: transparent;
    color: var(--a11y-accent);
}
.modiva-a11y-tts-btn.secondary:hover {
    background: var(--a11y-accent-soft);
    opacity: 1;
}

/* ── Reset link ──────────────────────────────────────────────────────── */
.modiva-a11y-reset {
    display: block;
    width: 100%;
    margin-top: .75rem;
    padding: .45rem;
    border: 1px solid var(--a11y-border);
    border-radius: 10px;
    background: transparent;
    color: var(--a11y-muted);
    font-size: .8rem;
    cursor: pointer;
    font-family: inherit;
    text-align: center;
    transition: background .15s ease;
}
.modiva-a11y-reset:hover {
    background: var(--a11y-accent-soft);
}
.modiva-a11y-reset:focus-visible {
    outline: 2px solid var(--a11y-accent);
    outline-offset: 2px;
}

/* ── Dark-Mode-Panel (folgt System; Funktions-Klassen haben Vorrang) ──── */
@media (prefers-color-scheme: dark) {
    #modiva-a11y-panel {
        --a11y-surface: #16161f;
        --a11y-fg: #eef0fb;
        --a11y-muted: #b4b8d4;
        --a11y-border: rgba(255,255,255,.14);
    }
}

/* ── High contrast override for the panel itself ─────────────────────── */
html.a11y-contrast #modiva-a11y-panel,
html.a11y-contrast #modiva-a11y-panel * {
    background-color: #000 !important;
    color: #fff !important;
    border-color: #fff !important;
}
html.a11y-contrast #modiva-a11y-btn {
    background: #ffdd00 !important;
    color: #000 !important;
    border-color: #ffdd00 !important;
}
