/**
 * Barrierefreiheits-Styles
 * WCAG 2.1 AA-Konformität
 */

/* ===== CSS VARIABLES für Schriftgrößen ===== */
:root {
    --font-size-base: 16px;
    --font-size-scale: 1;
}

html[data-font-size="large"] {
    --font-size-scale: 1.25;
}

html[data-font-size="xlarge"] {
    --font-size-scale: 1.5;
}

body {
    font-size: calc(var(--font-size-base) * var(--font-size-scale));
}

/* ===== BARRIEREFREIHEITS-STEUERUNG ===== */
.accessibility-controls {
    position: fixed !important;
    bottom: 20px !important;
    right: 20px !important;
    top: auto !important;
    left: auto !important;
    z-index: 99999 !important;
    display: block !important;
    visibility: visible !important;
    margin: 0 !important;
    padding: 0 !important;
    transform: none !important;
    pointer-events: auto !important;
}

.accessibility-toggle {
    background: var(--accent-gradient) !important;
    background: linear-gradient(135deg, #3B82F6 0%, #66A5AD 100%) !important;
    color: #FFFFFF !important;
    border: none !important;
    border-radius: 50% !important;
    padding: 0 !important;
    width: 56px !important;
    height: 56px !important;
    cursor: pointer !important;
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.4) !important;
    transition: all 0.3s ease !important;
    min-height: 56px !important;
    min-width: 56px !important;
    position: static !important;
    z-index: 99999 !important;
    margin: 0 !important;
}

.accessibility-toggle:hover {
    transform: translateY(-2px) scale(1.05) !important;
    box-shadow: 0 6px 20px rgba(59, 130, 246, 0.6) !important;
}

.accessibility-toggle:active {
    transform: translateY(0) scale(0.95) !important;
}

.accessibility-toggle:focus {
    outline: 3px solid #FFFF00 !important;
    outline-offset: 2px !important;
}

.accessibility-toggle svg {
    width: 28px !important;
    height: 28px !important;
    display: block !important;
    flex-shrink: 0 !important;
}

.accessibility-toggle-text {
    display: none !important;
    visibility: hidden !important;
}

/* ===== BARRIEREFREIHEITS-PANEL ===== */
.accessibility-panel {
    position: fixed;
    bottom: 80px;
    right: 20px;
    width: 320px;
    max-width: calc(100vw - 40px);
    background: var(--color-primary-light-bg);
    border: 2px solid var(--accent-primary);
    border-radius: 12px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
    padding: 20px;
    display: none !important;
    visibility: hidden;
    opacity: 0;
    z-index: 99999 !important;
    pointer-events: none;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}

.accessibility-panel[aria-hidden="false"] {
    display: block !important;
    visibility: visible !important;
    opacity: 1 !important;
    pointer-events: auto !important;
}

.accessibility-panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    padding-bottom: 12px;
    border-bottom: 2px solid var(--border-light);
}

.accessibility-panel-header h3 {
    margin: 0;
    font-size: 18px;
    font-weight: 600;
    color: var(--text-on-light);
}

.accessibility-close {
    background: none;
    border: none;
    font-size: 24px;
    color: var(--text-on-light);
    cursor: pointer;
    padding: 0;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 4px;
    transition: var(--transition-fast);
}

.accessibility-close:hover {
    background: var(--color-secondary-light-bg);
}

.accessibility-close:focus {
    outline: 3px solid var(--accent-primary);
    outline-offset: 2px;
}

/* ===== OPTIONEN ===== */
.accessibility-options {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.accessibility-option {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.accessibility-option label {
    font-weight: 600;
    color: var(--text-on-light);
    font-size: 14px;
}

/* ===== SCHRIFTGRÖSSEN-CONTROLS ===== */
.font-size-controls {
    display: flex;
    gap: 8px;
}

.font-size-btn {
    flex: 1;
    background: var(--color-secondary-light-bg);
    border: 2px solid var(--border-light);
    border-radius: 8px;
    padding: 12px;
    cursor: pointer;
    font-size: 18px;
    font-weight: 600;
    color: var(--text-on-light);
    transition: var(--transition-fast);
    min-height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.font-size-btn:hover {
    background: var(--accent-primary);
    color: #FFFFFF;
    border-color: var(--accent-primary);
}

.font-size-btn.active {
    background: var(--accent-primary);
    color: #FFFFFF;
    border-color: var(--accent-primary);
}

.font-size-btn:focus {
    outline: 3px solid var(--accent-primary);
    outline-offset: 2px;
}

/* ===== KONTRAST-TOGGLE ===== */
.contrast-toggle {
    width: 100%;
    background: var(--color-secondary-light-bg);
    border: 2px solid var(--border-light);
    border-radius: 8px;
    padding: 12px 16px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 14px;
    font-weight: 600;
    color: var(--text-on-light);
    transition: var(--transition-fast);
    min-height: 44px;
}

.contrast-toggle:hover {
    background: var(--accent-primary);
    color: #FFFFFF;
    border-color: var(--accent-primary);
}

.contrast-toggle[aria-pressed="true"] {
    background: var(--accent-primary);
    color: #FFFFFF;
    border-color: var(--accent-primary);
}

.contrast-toggle:focus {
    outline: 3px solid var(--accent-primary);
    outline-offset: 2px;
}

.contrast-icon {
    font-size: 20px;
}

/* ===== TASTATURKÜRZEL ===== */
.keyboard-shortcuts {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.shortcut-item {
    font-size: 12px;
    color: var(--text-muted-on-light);
    display: flex;
    align-items: center;
    gap: 8px;
}

kbd {
    background: var(--color-secondary-light-bg);
    border: 1px solid var(--border-light);
    border-radius: 4px;
    padding: 4px 8px;
    font-size: 11px;
    font-weight: 600;
    color: var(--text-on-light);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

/* ===== KONTRASTREICHER MODUS ===== */
html.high-contrast-mode {
    /* Zarte, gedämpfte Hintergrundfarben */
    --color-primary-dark-bg: #F5F5F5 !important;
    --color-primary-light-bg: #FFFFFF !important;
    --color-secondary-dark-bg: #F0F0F0 !important;
    --color-secondary-light-bg: #FAFAFA !important;
    --color-tertiary-dark-bg: #E8E8E8 !important;
    --bg-primary: #F5F5F5 !important;
    --bg-secondary: #F0F0F0 !important;
    --bg-tertiary: #E8E8E8 !important;
    --bg-card: #FFFFFF !important;
    --bg-card-hover: #F5F5F5 !important;
    
    /* Schrift überall schwarz */
    --text-primary: #000000 !important;
    --text-secondary: #000000 !important;
    --text-on-light: #000000 !important;
    --text-muted-on-light: #000000 !important;
    --text-muted: #000000 !important;
    
    /* Zarte Akzentfarben */
    --accent-primary: #4A90E2 !important;
    --accent-secondary: #7FB3D3 !important;
    --accent-cyan: #6BB6FF !important;
    
    /* Zarte Rahmen */
    --border-light: #CCCCCC !important;
    --border-color: #CCCCCC !important;
}

/* Alle Texte schwarz */
html.high-contrast-mode,
html.high-contrast-mode body,
html.high-contrast-mode p,
html.high-contrast-mode span,
html.high-contrast-mode div,
html.high-contrast-mode h1,
html.high-contrast-mode h2,
html.high-contrast-mode h3,
html.high-contrast-mode h4,
html.high-contrast-mode h5,
html.high-contrast-mode h6,
html.high-contrast-mode label,
html.high-contrast-mode li,
html.high-contrast-mode td,
html.high-contrast-mode th {
    color: #000000 !important;
}

/* Links - zarte Farbe, schwarzer Text */
html.high-contrast-mode a {
    color: #000000 !important;
    text-decoration: underline !important;
    background: transparent !important;
}

html.high-contrast-mode a:visited {
    color: #000000 !important;
    text-decoration: underline !important;
}

html.high-contrast-mode a:hover,
html.high-contrast-mode a:focus {
    color: #000000 !important;
    background: #E8F4FD !important;
    outline: 2px solid #4A90E2 !important;
    outline-offset: 2px !important;
}

/* Buttons - zarte Hintergründe, schwarzer Text */
html.high-contrast-mode button,
html.high-contrast-mode .btn,
html.high-contrast-mode input[type="button"],
html.high-contrast-mode input[type="submit"],
html.high-contrast-mode input[type="reset"] {
    border: 2px solid #CCCCCC !important;
    background: #F0F0F0 !important;
    color: #000000 !important;
}

html.high-contrast-mode button:hover,
html.high-contrast-mode .btn:hover,
html.high-contrast-mode input[type="button"]:hover,
html.high-contrast-mode input[type="submit"]:hover,
html.high-contrast-mode input[type="reset"]:hover {
    background: #E0E0E0 !important;
    color: #000000 !important;
    border-color: #999999 !important;
}

html.high-contrast-mode button:focus,
html.high-contrast-mode .btn:focus,
html.high-contrast-mode input[type="button"]:focus,
html.high-contrast-mode input[type="submit"]:focus,
html.high-contrast-mode input[type="reset"]:focus {
    outline: 3px solid #4A90E2 !important;
    outline-offset: 2px !important;
    color: #000000 !important;
}

/* Primary Buttons - zarte blaue Farbe, schwarzer Text */
html.high-contrast-mode .btn-primary,
html.high-contrast-mode button.btn-primary {
    background: #E8F4FD !important;
    color: #000000 !important;
    border: 2px solid #4A90E2 !important;
}

html.high-contrast-mode .btn-primary:hover,
html.high-contrast-mode button.btn-primary:hover {
    background: #D0E8F9 !important;
    color: #000000 !important;
    border-color: #4A90E2 !important;
}

/* Input-Felder - zarte Hintergründe, schwarzer Text */
html.high-contrast-mode input[type="text"],
html.high-contrast-mode input[type="email"],
html.high-contrast-mode input[type="password"],
html.high-contrast-mode input[type="number"],
html.high-contrast-mode input[type="tel"],
html.high-contrast-mode input[type="url"],
html.high-contrast-mode input[type="search"],
html.high-contrast-mode textarea,
html.high-contrast-mode select {
    background: #FFFFFF !important;
    color: #000000 !important;
    border: 2px solid #CCCCCC !important;
}

html.high-contrast-mode input[type="text"]:focus,
html.high-contrast-mode input[type="email"]:focus,
html.high-contrast-mode input[type="password"]:focus,
html.high-contrast-mode input[type="number"]:focus,
html.high-contrast-mode input[type="tel"]:focus,
html.high-contrast-mode input[type="url"]:focus,
html.high-contrast-mode input[type="search"]:focus,
html.high-contrast-mode textarea:focus,
html.high-contrast-mode select:focus {
    outline: 3px solid #4A90E2 !important;
    outline-offset: 2px !important;
    border-color: #4A90E2 !important;
    color: #000000 !important;
}

/* Cards und Container - zarte Hintergründe */
html.high-contrast-mode .card,
html.high-contrast-mode .section,
html.high-contrast-mode .container,
html.high-contrast-mode main,
html.high-contrast-mode article {
    background: #FFFFFF !important;
    color: #000000 !important;
}

/* Header und Navigation - zarte Hintergründe, schwarzer Text */
html.high-contrast-mode .main-header,
html.high-contrast-mode header {
    background: #F5F5F5 !important;
    color: #000000 !important;
}

html.high-contrast-mode .main-nav a,
html.high-contrast-mode nav a {
    color: #000000 !important;
}

html.high-contrast-mode .main-nav a:hover,
html.high-contrast-mode nav a:hover {
    background: #E8F4FD !important;
    color: #000000 !important;
}

/* Footer - zarte Hintergründe, schwarzer Text */
html.high-contrast-mode .main-footer,
html.high-contrast-mode footer {
    background: #F0F0F0 !important;
    color: #000000 !important;
}

html.high-contrast-mode .main-footer a,
html.high-contrast-mode footer a {
    color: #000000 !important;
}

/* Alerts und Messages - zarte Hintergründe, schwarzer Text */
html.high-contrast-mode .alert,
html.high-contrast-mode .alert-success,
html.high-contrast-mode .alert-error,
html.high-contrast-mode .alert-warning,
html.high-contrast-mode .alert-info {
    background: #F5F5F5 !important;
    color: #000000 !important;
    border: 2px solid #CCCCCC !important;
}

/* Tabellen - zarte Hintergründe, schwarzer Text */
html.high-contrast-mode table,
html.high-contrast-mode th,
html.high-contrast-mode td {
    background: #FFFFFF !important;
    color: #000000 !important;
    border: 1px solid #CCCCCC !important;
}

html.high-contrast-mode th {
    background: #F0F0F0 !important;
    color: #000000 !important;
}

/* ===== FOCUS-INDICATORS (für alle Seiten) ===== */
*:focus-visible {
    outline: 3px solid var(--accent-primary);
    outline-offset: 2px;
}

html.high-contrast-mode *:focus-visible {
    outline: 3px solid #0000FF;
    outline-offset: 2px;
}

/* ===== MOBILE ANPASSUNGEN ===== */
@media (max-width: 767px) {
    .accessibility-controls {
        bottom: 15px !important;
        right: 15px !important;
        top: auto !important;
        left: auto !important;
    }
    
    .accessibility-panel {
        bottom: 80px !important;
        right: 15px !important;
        left: 15px !important;
        width: auto !important;
        top: auto !important;
    }
    
    .accessibility-toggle {
        width: 50px !important;
        height: 50px !important;
        min-width: 50px !important;
        min-height: 50px !important;
        position: static !important;
    }
    
    .accessibility-toggle svg {
        width: 24px !important;
        height: 24px !important;
    }
}