html.a11y {
    font-size: 120%;

    /* Общие упрощения для a11y-режима: убираем стекло, тени и полупрозрачность */
    --color-bg-card-soft: var(--color-bg-card);
    --color-bg-card-strong: var(--color-bg-card);
    --color-bg-overlay: transparent;
    --color-accent-light: var(--color-bg-secondary);
    --color-accent-strong: var(--color-accent);
    --color-accent-strong-hover: var(--color-accent-hover);
    --color-accent-wash: var(--color-bg-secondary);
    --color-accent-wash-strong: var(--color-bg-secondary);
    --color-accent-wash-solid: var(--color-bg-secondary);
    --color-surface-muted: var(--color-bg-secondary);
    --color-surface-page: var(--color-bg-secondary);
    --color-border-soft: var(--color-border);
    --color-border-faint: var(--color-border);
    --color-border-strong: var(--color-border);
    --color-emergency: var(--color-text-primary);
    --color-emergency-hover: var(--color-text-muted);
    --shadow-card: none;
    --shadow-card-lg: none;
    --shadow-dropdown: none;
    --shadow-button: none;
    --a11y-control-active-bg: var(--color-text-primary);
    --a11y-control-active-text: var(--color-bg-primary);
    --a11y-control-active-border: var(--color-text-primary);
    --a11y-scrollbar-size: 18px;
    --a11y-scrollbar-content-gap: 0.75rem;
    --a11y-scrollbar-track: var(--color-bg-secondary);
    --a11y-scrollbar-thumb: var(--color-text-muted);
    --a11y-scrollbar-thumb-hover: var(--color-text-primary);
    --a11y-scrollbar-border: var(--color-bg-primary);
}

html.a11y * {
    font-family: Arial, Helvetica, sans-serif !important;
    line-height: 1.7;
    transition: none !important;
    animation: none !important;
}

html.a11y *:focus-visible,
html.a11y *:focus {
    outline: 3px solid currentColor !important;
    outline-offset: 3px !important;
}

/* Режим: черный на белом */
html.a11y[data-a11y="bw"] {
    --color-bg-primary: #ffffff;
    --color-bg-secondary: #f2f2f2;
    --color-bg-card: #ffffff;
    --color-text-primary: #111111;
    --color-text-body: #111111;
    --color-text-muted: #2b2b2b;
    --color-text-subtle: #444444;
    --color-text-inverse: #ffffff;
    --color-accent: #111111;
    --color-accent-hover: #000000;
    --color-thead-bg: #111111;
    --color-thead-border: #111111;
    --color-border: #111111;
    --bg-100: #ffffff;
    --bg-200: #f2f2f2;
    --dept-bg: #ffffff;
    --color-white: #f2f2f2;
    --color-grey: #2b2b2b;
    --thead-color: #111111;
    --buttons-hover: #000000;
    --a11y-scrollbar-track: #f2f2f2;
    --a11y-scrollbar-thumb: #555555;
    --a11y-scrollbar-thumb-hover: #111111;
    --a11y-scrollbar-border: #ffffff;
}

/* Режим: белый на черном */
html.a11y[data-a11y="bw-inv"] {
    --color-bg-primary: #000000;
    --color-bg-secondary: #111111;
    --color-bg-card: #000000;
    --color-text-primary: #ffffff;
    --color-text-body: #ffffff;
    --color-text-muted: #ededed;
    --color-text-subtle: #d4d4d4;
    --color-text-inverse: #000000;
    --color-accent: #ffffff;
    --color-accent-hover: #d9d9d9;
    --color-thead-bg: #ffffff;
    --color-thead-border: #ffffff;
    --color-border: #ffffff;
    --bg-100: #000000;
    --bg-200: #111111;
    --dept-bg: #000000;
    --color-white: #111111;
    --color-grey: #ededed;
    --thead-color: #ffffff;
    --buttons-hover: #d9d9d9;
    --a11y-scrollbar-track: #111111;
    --a11y-scrollbar-thumb: #bdbdbd;
    --a11y-scrollbar-thumb-hover: #ffffff;
    --a11y-scrollbar-border: #000000;
}

/* Режим: бежевый */
html.a11y[data-a11y="sepia"] {
    --color-bg-primary: #f6eddc;
    --color-bg-secondary: #efe3c8;
    --color-bg-card: #f9f1e1;
    --color-text-primary: #2f2416;
    --color-text-body: #2f2416;
    --color-text-muted: #5f4a2d;
    --color-text-subtle: #735c3a;
    --color-text-inverse: #fff8ee;
    --color-accent: #6a4520;
    --color-accent-hover: #523517;
    --color-thead-bg: #6a4520;
    --color-thead-border: #6a4520;
    --color-border: #8e6b3f;
    --bg-100: #f6eddc;
    --bg-200: #efe3c8;
    --dept-bg: #f9f1e1;
    --color-white: #efe3c8;
    --color-grey: #5f4a2d;
    --thead-color: #6a4520;
    --buttons-hover: #523517;
    --a11y-scrollbar-track: #efe3c8;
    --a11y-scrollbar-thumb: #8e6b3f;
    --a11y-scrollbar-thumb-hover: #2f2416;
    --a11y-scrollbar-border: #f6eddc;
}

/* Размер шрифта */
html.a11y[data-font="normal"] { font-size: 120%; }
html.a11y[data-font="large"]  { font-size: 140%; }
html.a11y[data-font="xlarge"] { font-size: 160%; }

/* Межбуквенный интервал */
html.a11y[data-spacing="wide"] * {
    letter-spacing: 0.08em;
}

/* Изображения */
html.a11y[data-images="off"] img {
    opacity: 0;
    pointer-events: none;
}

/* Базовая нормализация сложных декоративных поверхностей */
html.a11y body,
html.a11y body[data-page="home"],
html.a11y main.home-page,
html.a11y .footer-links,
html.a11y .footer-social,
html.a11y .footer-social::before {
    background: var(--color-bg-primary) !important;
    background-image: none !important;
    color: var(--color-text-body) !important;
}

html.a11y .home-hero::before,
html.a11y .footer-social::before,
html.a11y .footer-links__column::before,
html.a11y .footer-links__column--slogan::after {
    display: none !important;
}

html.a11y .headmain,
html.a11y .site-header,
html.a11y .site-nav-menu,
html.a11y .site-user-menu__panel,
html.a11y .site-mobile-nav__panel,
html.a11y .site-mobile-nav__header,
html.a11y .site-mobile-nav__content,
html.a11y .site-mobile-nav__footer,
html.a11y .site-settings-menu__row,
html.a11y .site-a11y-panel,
html.a11y .site-menu-card,
html.a11y .site-mobile-nav__primary-link,
html.a11y .site-mobile-settings__row,
html.a11y .site-mobile-settings__button,
html.a11y .site-mobile-settings .site-a11y-panel,
html.a11y .site-user-menu__trigger,
html.a11y .site-mobile-nav__account-link,
html.a11y .home-hero__feature,
html.a11y .home-hero__badge,
html.a11y .home-hero__media-frame,
html.a11y .material-card,
html.a11y .footer-links__column,
html.a11y .surface-card {
    background: var(--color-bg-card) !important;
    border-color: var(--color-border) !important;
    box-shadow: none !important;
    backdrop-filter: none !important;
    -webkit-backdrop-filter: none !important;
}

html.a11y .site-header,
html.a11y .site-mobile-nav__header,
html.a11y .site-mobile-nav__footer,
html.a11y .site-mobile-settings .site-a11y-panel,
html.a11y .footer-social {
    background: var(--color-bg-secondary) !important;
}

html.a11y .footer-social {
    border-top-color: var(--color-border) !important;
    box-shadow: none !important;
}

html.a11y .home-hero__feature span,
html.a11y .home-hero__lead,
html.a11y .site-menu-card__description,
html.a11y .footer-links__slogan-line--warm,
html.a11y .footer-links__slogan-line--accent {
    color: var(--color-text-body) !important;
}

html.a11y .footer-social__title,
html.a11y .footer-social__link,
html.a11y .footer-social__icon {
    color: var(--color-text-primary) !important;
}

html.a11y .site-header-actions__login,
html.a11y .home-hero__button,
html.a11y .home-prevention__btn-all,
html.a11y .site-mobile-nav__close,
html.a11y .site-user-menu__link,
html.a11y .site-user-menu__logout,
html.a11y .footer-social__link {
    box-shadow: none !important;
}

html.a11y .site-header-actions__login:focus-visible,
html.a11y .home-hero__button:focus-visible,
html.a11y .home-prevention__btn-all:focus-visible {
    outline-color: var(--color-text-primary) !important;
}

html.a11y .home-hero__features {
    grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr)) !important;
    max-width: 100% !important;
}

html.a11y .home-hero__feature {
    min-height: auto !important;
    align-items: flex-start !important;
}

html.a11y .home-hero__feature span {
    overflow-wrap: anywhere;
}

/* Системный popup сохраняет контраст и семантическую иерархию без стекла. */
html.a11y .modern-popup {
    color: var(--color-text-body) !important;
    background: var(--color-bg-card) !important;
    background-image: none !important;
    border: 2px solid var(--color-border) !important;
    box-shadow: none !important;
    backdrop-filter: none !important;
    -webkit-backdrop-filter: none !important;
}

html.a11y .modern-popup::before {
    background: var(--color-text-primary) !important;
}

html.a11y .modern-popup-overlay {
    background: rgba(0, 0, 0, 0.78) !important;
    backdrop-filter: none !important;
    -webkit-backdrop-filter: none !important;
}

html.a11y .modern-popup__header {
    color: var(--color-text-primary) !important;
    background: var(--color-bg-secondary) !important;
    background-image: none !important;
    border-bottom-color: var(--color-border) !important;
}

html.a11y .modern-popup__title,
html.a11y .modern-popup__section-title,
html.a11y .modern-popup__paragraph,
html.a11y .modern-popup__list-item,
html.a11y .modern-popup__link-item,
html.a11y .modern-popup__content {
    color: var(--color-text-body) !important;
}

html.a11y .modern-popup__title,
html.a11y .modern-popup__section-title {
    color: var(--color-text-primary) !important;
}

html.a11y .modern-popup__close {
    color: var(--color-text-primary) !important;
    background: var(--color-bg-card) !important;
    border: 2px solid var(--color-border) !important;
    box-shadow: none !important;
}

html.a11y .modern-popup__close:hover {
    color: var(--a11y-control-active-text) !important;
    background: var(--a11y-control-active-bg) !important;
    border-color: var(--a11y-control-active-border) !important;
    transform: none !important;
}

html.a11y .modern-popup__list-item::before {
    background: var(--color-text-primary) !important;
}

html.a11y .modern-popup__link-item::before {
    color: var(--color-text-primary) !important;
    background: none !important;
}

html.a11y .modern-popup__link {
    color: var(--color-text-primary) !important;
    text-decoration-color: currentColor !important;
}

/* Панель управления */
.a11y-panel {
    display: none;
    align-items: center;
    gap: 12px;
    padding: 8px 16px;
    background-color: var(--color-bg-secondary);
    border-bottom: 2px solid var(--color-border);
    font-size: 0.875rem;
    flex-wrap: wrap;
}

html.a11y .a11y-panel {
    display: flex;
}

.a11y-panel__label {
    font-weight: 600;
    color: var(--color-text-muted);
}

.a11y-panel__group {
    display: flex;
    align-items: center;
    gap: 4px;
}

.a11y-panel__btn {
    padding: 4px 10px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm, 0.375rem);
    background: var(--color-bg-primary);
    color: var(--color-text-primary);
    cursor: pointer;
    font-size: 0.875rem;
    line-height: 1.4;
}

.a11y-panel__btn:hover,
.a11y-panel__btn--active {
    background: var(--a11y-control-active-bg);
    color: var(--a11y-control-active-text);
    border-color: var(--a11y-control-active-border);
}