/*
 * TNSVT Reino v2 - Accessibility & Reduced Motion
 *
 * Respects the OS-level "Reduce Motion" preference.
 * Disables infinite animations, transitions, and scroll-snap.
 * Keeps semantic animations (modal fade-in) but at 0.01ms duration
 * (effectively instant) to preserve layout integrity.
 *
 * Apply via @media query — no JS required.
 */

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
        transform: none !important;
    }

    /* Explicitly stop these specific animations that distract even with reduced motion */
    .live-dot,
    .live-dot-notif,
    .cf-fab,
    .cf-bubble,
    .cf-typing-dots span,
    .cf-panel,
    .freq-ring,
    .audio-wave-bar,
    .bell-badge,
    .pulse-gold,
    .pulse-aura,
    .pulse-aura-elev,
    .v2-pulse-gold,
    .v2-pulse-violet,
    .countdown-display,
    .tj-cal-cell.today,
    .tj-today-pulse,
    .pulse-dot,
    .status-dot,
    .pulseGlow,
    .pulseCircle,
    .pulse-status,
    .live-indicator-header,
    .live-dot-notif,
    .scan-sweep::after,
    .reveal-path {
        animation: none !important;
    }

    /* Disable WebGL/Three.js for users with reduced motion */
    .bg-shader-canvas {
        display: none !important;
    }
}

/* Skeleton loader utility (replaces the plain "Cargando…" text) */
.skeleton {
    background: linear-gradient(
        90deg,
        var(--glass-bg-elev, rgba(255, 255, 255, 0.02)) 0%,
        var(--glass-bg-strong-elev, rgba(255, 255, 255, 0.05)) 50%,
        var(--glass-bg-elev, rgba(255, 255, 255, 0.02)) 100%
    );
    background-size: 200% 100%;
    animation: skeleton-shimmer 1.5s infinite;
    border-radius: 0.375rem;
    display: inline-block;
    min-height: 1em;
}

.skeleton-line {
    height: 0.875rem;
    margin: 0.5rem 0;
    border-radius: 0.25rem;
}

.skeleton-block {
    height: 6rem;
    margin: 1rem 0;
    border-radius: 0.5rem;
}

.skeleton-circle {
    width: 2.5rem;
    height: 2.5rem;
    border-radius: 50%;
}

/* Page-load fade-in (replaces abrupt loading states) */
.fade-in-page {
    animation: fade-in-page 0.3s ease-out;
}

@keyframes fade-in-page {
    from {
        opacity: 0;
        transform: translateY(8px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ═══════════════════════════════════════════════════════════════
   FOCUS VISIBLE — WCAG 2.4.7 (keyboard focus indicator)
   Global default. Components can override with their own
   :focus-visible when they need a different style.
   ═══════════════════════════════════════════════════════════════ */
:focus {
    outline: none;
}
:focus-visible {
    outline: 2px solid var(--gold-elev);
    outline-offset: 2px;
    border-radius: 4px;
    transition: outline-offset var(--duration-fast) var(--ease-standard);
}
button:focus-visible,
a:focus-visible,
[role='button']:focus-visible,
[role='tab']:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible,
summary:focus-visible {
    outline: 2px solid var(--gold-elev);
    outline-offset: 2px;
}
/* Darker gold for light theme via [data-theme="light"] override */
[data-theme='light'] :focus-visible {
    outline-color: var(--gold-container-elev);
}

/* Inset focus for elements that already have heavy outlines */
.material-symbols-elev:focus-visible,
.icon-only-btn:focus-visible {
    outline-offset: 4px;
}

/* Skip link for keyboard users (target a11y.js-driven feature later) */
/* Visually hidden with the clip pattern (NOT top:-40px, which leaks when
   the link is taller than 40px) — revealed only on keyboard focus. */
.skip-link {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    clip-path: inset(50%);
    white-space: nowrap;
    border: 0;
    z-index: var(--z-modal-critical);
    background: var(--gold-elev);
    color: var(--on-primary-elev);
    border-radius: var(--radius-md);
    font-family: var(--font-display-elev);
    font-weight: 600;
    text-decoration: none;
}
.skip-link:focus-visible {
    width: auto;
    height: auto;
    padding: var(--space-2) var(--space-4);
    margin: 0;
    overflow: visible;
    clip: auto;
    clip-path: none;
    white-space: normal;
    top: var(--space-3);
    left: var(--space-3);
}

/* Forced-colors (Windows High Contrast) fallback */
@media (forced-colors: active) {
    :focus-visible {
        outline: 3px solid CanvasText;
    }
    .status-pill,
    .ui-btn,
    .ui-card {
        border: 1px solid CanvasText;
    }
}

/* ═══════════════════════════════════════════════════════════════
   TOUCH TARGETS — WCAG 2.5.5 (44×44 minimum for touch)
   Only applies on coarse pointers (mobile/tablet), so desktop
   button density is not affected.
   ═══════════════════════════════════════════════════════════════ */
@media (pointer: coarse) {
    button,
    a,
    [role='button'],
    .sanctum-link,
    .filter-pill,
    .modal-close,
    .protocol-close,
    .notif-popover-markall,
    .academic-modal-close,
    .chat-tab,
    .feed-tab,
    .academic-view-tab,
    .academic-filter {
        min-height: 44px;
        min-width: 44px;
    }

    /* Inherit display: inline-flex so min-width doesn't break inline icons */
    button:not([class*='flex'], [class*='grid']) {
        display: inline-flex;
        align-items: center;
        justify-content: center;
    }
}

/* ═══════════════════════════════════════════════════════════════
   FOCUS RINGS — WCAG 2.4.7 (Focus Visible) — Tier 1.A
   Keyboard-only. Hidden on mouse/touch via :focus:not(:focus-visible).
   Gold accent matches brand, offset 2px. */
*:focus {
    outline: none;
}
*:focus-visible {
    outline: 2px solid var(--gold-elev);
    outline-offset: 2px;
    border-radius: inherit;
}
.form-input:focus-visible,
.form-select:focus-visible,
textarea:focus-visible {
    outline: 2px solid var(--gold-elev);
    outline-offset: 0;
    border-color: var(--gold-elev);
    box-shadow: 0 0 0 3px rgba(242, 202, 80, 0.15);
}
.sanctum-link:focus-visible {
    outline: 2px solid var(--gold-elev);
    outline-offset: -2px;
    background: rgba(242, 202, 80, 0.08);
}
button[aria-label]:focus-visible {
    outline: 2px dashed var(--gold-bright-elev);
    outline-offset: 3px;
}