/* Thanh công cụ Hỗ trợ tiếp cận người khuyết tật & người cao tuổi (WCAG 2.1/2.2 Level AA)
   Thiết kế bám sát lề phải màn hình (Right Floating Panel), có nút mũi tên thò ra thụt vào */

.accessibility-panel {
    position: fixed;
    right: 0;
    top: 180px;
    z-index: 999999;
    display: flex;
    align-items: stretch;
    transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    filter: drop-shadow(-2px 3px 8px rgba(0, 0, 0, 0.25));
}

/* Trạng thái thu gọn (thụt vào trong lề phải) */
.accessibility-panel.collapsed {
    transform: translateX(calc(100% - 38px));
}

/* Nút bấm mũi tên điều khiển thò ra / thụt vào */
.accessibility-toggle-btn {
    width: 38px;
    background: #0b497b;
    color: #ffffff;
    border: 1px solid #1a629b;
    border-right: none;
    border-radius: 8px 0 0 8px;
    cursor: pointer;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 10px 4px;
    gap: 8px;
    transition: background 0.2s, color 0.2s;
    outline: none;
}

.accessibility-toggle-btn:hover,
.accessibility-toggle-btn:focus-visible {
    background: #08385f;
    color: #ffcc00;
}

.accessibility-toggle-icon {
    font-size: 15px;
    color: #ffcc00;
}

.accessibility-toggle-arrow {
    font-size: 13px;
    transition: transform 0.3s ease;
}

/* Xoay mũi tên khi mở ra / thụt vào */
.accessibility-panel.collapsed .accessibility-toggle-arrow {
    transform: rotate(180deg);
}

.accessibility-toggle-text {
    writing-mode: vertical-rl;
    text-orientation: mixed;
    font-size: 11.5px;
    font-weight: 600;
    letter-spacing: 1px;
    text-transform: uppercase;
    color: #ffffff;
    user-select: none;
}

/* Khung nội dung chức năng của thanh công cụ */
.accessibility-content {
    background: #0b497b;
    color: #ffffff;
    padding: 14px 16px;
    border-radius: 0 0 0 8px;
    border: 1px solid #1a629b;
    border-right: none;
    display: flex;
    flex-direction: column;
    gap: 12px;
    min-width: 240px;
    box-sizing: border-box;
}

.accessibility-header {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 13.5px;
    font-weight: 700;
    color: #ffffff;
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
    padding-bottom: 8px;
}

.accessibility-header i {
    color: #ffcc00;
    font-size: 16px;
}

.accessibility-section {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.accessibility-label {
    font-size: 12px;
    font-weight: 600;
    color: #e2e8f0;
    display: flex;
    align-items: center;
    gap: 6px;
}

.accessibility-label i {
    color: #cbd5e1;
}

.accessibility-btn-group {
    display: flex;
    align-items: center;
    gap: 6px;
}

.accessibility-btn {
    background: rgba(255, 255, 255, 0.15);
    border: 1px solid rgba(255, 255, 255, 0.35);
    color: #ffffff;
    border-radius: 4px;
    padding: 5px 10px;
    font-size: 12px;
    font-weight: 600;
    cursor: pointer;
    line-height: 1.2;
    transition: all 0.2s ease;
    text-decoration: none !important;
    text-align: center;
    flex: 1;
}

.accessibility-btn:hover,
.accessibility-btn:focus-visible {
    background: #ffffff;
    color: #0b497b;
    border-color: #ffffff;
    outline: 2px solid #ffcc00;
}

.accessibility-btn.active {
    background: #ffcc00;
    color: #1a1a1a;
    border-color: #ffcc00;
}

.accessibility-btn-contrast-yellow {
    background: #000;
    color: #ffff00;
    border-color: #ffff00;
}

.accessibility-btn-contrast-yellow:hover {
    background: #ffff00;
    color: #000;
}

/* Chế độ tương phản cao (High Contrast: Đen - Vàng) */
body.accessibility-contrast-yellow,
body.accessibility-contrast-yellow #whole-page,
body.accessibility-contrast-yellow .region-top,
body.accessibility-contrast-yellow .ModuleWrapper,
body.accessibility-contrast-yellow .panel,
body.accessibility-contrast-yellow .panel-body,
body.accessibility-contrast-yellow .bg-light,
body.accessibility-contrast-yellow article,
body.accessibility-contrast-yellow .container {
    background-color: #000000 !important;
    background-image: none !important;
    color: #ffffff !important;
}

body.accessibility-contrast-yellow a,
body.accessibility-contrast-yellow h1,
body.accessibility-contrast-yellow h2,
body.accessibility-contrast-yellow h3,
body.accessibility-contrast-yellow h4,
body.accessibility-contrast-yellow .common-title,
body.accessibility-contrast-yellow .article-title,
body.accessibility-contrast-yellow .title-detail,
body.accessibility-contrast-yellow strong,
body.accessibility-contrast-yellow .accessibility-label,
body.accessibility-contrast-yellow .accessibility-header {
    color: #ffff00 !important;
}

body.accessibility-contrast-yellow p,
body.accessibility-contrast-yellow span,
body.accessibility-contrast-yellow div {
    color: #ffffff !important;
}

body.accessibility-contrast-yellow .accessibility-panel,
body.accessibility-contrast-yellow .accessibility-content,
body.accessibility-contrast-yellow .accessibility-toggle-btn {
    background: #111111 !important;
    border-color: #ffff00 !important;
}

/* Chế độ đen trắng (Grayscale) */
body.accessibility-grayscale {
    filter: grayscale(100%) !important;
    -webkit-filter: grayscale(100%) !important;
}

/* Các cấp độ cỡ chữ toàn trang (Global Font Scaling) */
body.font-size-lvl-1 { font-size: 110% !important; }
body.font-size-lvl-2 { font-size: 120% !important; }
body.font-size-lvl-3 { font-size: 135% !important; }

body.font-size-lvl-1 p, body.font-size-lvl-1 a, body.font-size-lvl-1 span, body.font-size-lvl-1 li { font-size: 1.08em !important; }
body.font-size-lvl-2 p, body.font-size-lvl-2 a, body.font-size-lvl-2 span, body.font-size-lvl-2 li { font-size: 1.18em !important; }
body.font-size-lvl-3 p, body.font-size-lvl-3 a, body.font-size-lvl-3 span, body.font-size-lvl-3 li { font-size: 1.30em !important; }

@media (max-width: 768px) {
    .accessibility-panel {
        top: auto;
        bottom: 80px;
    }
}