/**
 * VentiStudio - Accessibility Enhancements
 * Focus styles and accessibility improvements
 * This file is separate from style.css as requested
 */

/* ============================================================
   FOCUS STYLES (focus-visible)
   ============================================================ */

/* Default focus-visible for all interactive elements */
*:focus-visible {
    outline: 3px solid var(--accent, #6366f1);
    outline-offset: 2px;
    border-radius: 4px;
}

/* Remove default focus, keep focus-visible */
*:focus:not(:focus-visible) {
    outline: none;
}

/* Specific focus styles for different elements */

/* Links */
a:focus-visible {
    outline: 2px solid var(--accent, #6366f1);
    outline-offset: 3px;
    background-color: rgba(99, 102, 241, 0.1);
    border-radius: 2px;
}

/* Buttons */
button:focus-visible,
.cta:focus-visible,
[type="button"]:focus-visible,
[type="submit"]:focus-visible {
    outline: 3px solid var(--accent, #6366f1);
    outline-offset: 3px;
    box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.3);
}

/* Form inputs */
input:focus-visible,
textarea:focus-visible,
select:focus-visible {
    outline: 2px solid var(--accent, #6366f1);
    outline-offset: 0;
    border-color: var(--accent, #6366f1);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
}

/* Navigation items */
.nav-link:focus-visible,
.nav-group summary:focus-visible {
    outline: 2px solid var(--accent, #6366f1);
    outline-offset: 4px;
    background-color: rgba(99, 102, 241, 0.1);
    border-radius: 4px;
}

/* Burger menu button */
.nav-burger:focus-visible {
    outline: 3px solid var(--accent, #6366f1);
    outline-offset: 4px;
}

/* Cards and interactive elements */
.feature-card:focus-visible,
.recommendation-card:focus-visible,
.value-item:focus-visible {
    outline: 3px solid var(--accent, #6366f1);
    outline-offset: 4px;
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(99, 102, 241, 0.2);
}

/* Skip link (accessibility) */
.skip-link {
    position: absolute;
    top: -100%;
    left: 50%;
    transform: translateX(-50%);
    z-index: 10000;
    padding: 1rem 2rem;
    background: var(--accent, #6366f1);
    color: white;
    text-decoration: none;
    font-weight: 600;
    border-radius: 0 0 8px 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

.skip-link:focus {
    top: 0;
    outline: 3px solid white;
    outline-offset: 2px;
}

/* ============================================================
   REDUCED MOTION
   ============================================================ */

@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;
    }
    
    .hero-orbs .orb {
        animation: none !important;
    }
    
    .feature-card,
    .value-item {
        transition: none !important;
    }
}

/* ============================================================
   HIGH CONTRAST MODE
   ============================================================ */

@media (prefers-contrast: high) {
    :root {
        --accent: #818cf8;
        --text-primary: #ffffff;
        --text-secondary: #e5e5e5;
    }
    
    *:focus-visible {
        outline: 4px solid currentColor;
        outline-offset: 2px;
    }
    
    .feature-card,
    .value-item,
    .stat {
        border: 2px solid currentColor;
    }
}

/* ============================================================
   SCREEN READER ONLY (visually hidden)
   ============================================================ */

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.sr-only-focusable:focus,
.sr-only-focusable:active {
    position: static;
    width: auto;
    height: auto;
    padding: inherit;
    margin: inherit;
    overflow: visible;
    clip: auto;
    white-space: normal;
}

/* ============================================================
   ARIA LIVE REGIONS
   ============================================================ */

[aria-live="polite"],
[aria-live="assertive"] {
    position: absolute;
    left: -10000px;
    width: 1px;
    height: 1px;
    overflow: hidden;
}

/* ============================================================
   ERROR STATES ACCESSIBILITY
   ============================================================ */

[aria-invalid="true"] {
    border-color: #ef4444 !important;
    box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.2) !important;
}

[aria-invalid="true"]:focus-visible {
    outline-color: #ef4444 !important;
}

/* Error message styling */
.form-error {
    color: #ef4444;
    font-size: 0.875rem;
    margin-top: 0.25rem;
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.form-error::before {
    content: "⚠️";
}

/* ============================================================
   TAB PANEL ACCESSIBILITY
   ============================================================ */

[role="tablist"] {
    display: flex;
    gap: 0.5rem;
}

[role="tab"] {
    cursor: pointer;
}

[role="tab"][aria-selected="true"] {
    font-weight: 600;
    border-bottom: 2px solid var(--accent, #6366f1);
}

[role="tabpanel"] {
    padding: 1rem;
}

[role="tabpanel"][hidden] {
    display: none;
}

/* ============================================================
   DIALOG/MODAL ACCESSIBILITY
   ============================================================ */

dialog::backdrop {
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(4px);
}

dialog[open] {
    border: none;
    border-radius: 12px;
    padding: 0;
    max-width: 90vw;
    max-height: 90vh;
}

dialog:focus-visible {
    outline: 3px solid var(--accent, #6366f1);
    outline-offset: -3px;
}

/* ============================================================
   LOADING STATES
   ============================================================ */

[aria-busy="true"] {
    position: relative;
}

[aria-busy="true"]::after {
    content: "";
    position: absolute;
    top: 50%;
    left: 50%;
    width: 1rem;
    height: 1rem;
    margin: -0.5rem 0 0 -0.5rem;
    border: 2px solid transparent;
    border-top-color: var(--accent, #6366f1);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* ============================================================
   DISCLOSURE (DETAILS/SUMMARY)
   ============================================================ */

details > summary {
    cursor: pointer;
    list-style: none;
}

details > summary::-webkit-details-marker {
    display: none;
}

details > summary:focus-visible {
    outline: 2px solid var(--accent, #6366f1);
    outline-offset: 2px;
}

/* ============================================================
   NOTIFICATIONS/TOASTS
   ============================================================ */

.toast[role="alert"] {
    position: fixed;
    bottom: 1rem;
    right: 1rem;
    z-index: 1000;
    padding: 1rem 1.5rem;
    background: var(--surface, #1a1a2e);
    border: 1px solid var(--border, #2a2a3e);
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

.toast[role="alert"]:focus-visible {
    outline: 3px solid var(--accent, #6366f1);
}