/**
 * Accessibility Styles - WCAG 2.1 AA Compliance
 * Lega Pro Serie C
 */

/* =====================================================
   SKIP LINK
   ===================================================== */
.skip-link {
    position: absolute;
    top: -9999px;
    left: -9999px;
    background: #5B2C6F;
    color: #ffffff;
    padding: 12px 24px;
    text-decoration: none;
    font-weight: 600;
    font-size: 14px;
    border-radius: 0 0 8px 8px;
    z-index: 999999;
    opacity: 0;
    pointer-events: none;
}

.skip-link:focus,
.skip-link:focus-visible {
    position: fixed;
    top: 10px;
    left: 50%;
    transform: translateX(-50%);
    opacity: 1;
    pointer-events: auto;
    outline: 3px solid #FFD700;
    outline-offset: 2px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

/* =====================================================
   FOCUS STYLES - Visibilità navigazione tastiera
   ===================================================== */

/* Focus generico per tutti gli elementi interattivi */
a:focus,
button:focus,
input:focus,
select:focus,
textarea:focus,
[tabindex]:focus {
    outline: 3px solid #5B2C6F;
    outline-offset: 2px;
}

/* Focus visibile solo con tastiera (non con mouse) */
a:focus:not(:focus-visible),
button:focus:not(:focus-visible),
input:focus:not(:focus-visible),
select:focus:not(:focus-visible),
textarea:focus:not(:focus-visible) {
    outline: none;
}

a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible,
[tabindex]:focus-visible {
    outline: 3px solid #5B2C6F;
    outline-offset: 2px;
}

/* Focus su sfondo scuro */
.bg-dark a:focus-visible,
.bg-dark button:focus-visible,
footer a:focus-visible,
footer button:focus-visible,
[style*="background: #5B2C6F"] a:focus-visible,
[style*="background: #5B2C6F"] button:focus-visible {
    outline-color: #FFD700;
}

/* =====================================================
   CONTRASTI MIGLIORATI
   ===================================================== */

/* Testo grigio con contrasto migliorato (almeno 4.5:1) */
.text-muted,
.text-secondary {
    color: #595959 !important; /* Era #6c757d - ora più scuro per WCAG AA */
}

/* Link con contrasto adeguato */
a {
    color: #5B2C6F;
}

a:hover {
    color: #3d1d4a;
}

/* Placeholder con contrasto adeguato */
::placeholder {
    color: #666666;
    opacity: 1;
}

/* =====================================================
   SCREEN READER UTILITIES
   ===================================================== */

/* Classe per elementi visibili solo a screen reader */
.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;
}

/* Mostra elemento sr-only quando ha focus */
.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;
}

/* =====================================================
   MOTION - Rispetta preferenze utente
   ===================================================== */
@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;
    }
}

/* =====================================================
   HIGH CONTRAST MODE
   ===================================================== */
@media (prefers-contrast: high) {
    a:focus-visible,
    button:focus-visible {
        outline: 3px solid currentColor;
        outline-offset: 3px;
    }

    .skip-link:focus {
        outline: 4px solid #000000;
        background: #FFD700;
        color: #000000;
    }
}

/* =====================================================
   TOUCH TARGET SIZE (minimo 44x44px per WCAG)
   ===================================================== */
button,
[type="button"],
[type="submit"],
[type="reset"],
.btn {
    min-height: 44px;
    min-width: 44px;
}

/* Link in navigazione */
nav a,
.nav-link {
    min-height: 44px;
    display: inline-flex;
    align-items: center;
}