/**
 * accessibility.css
 * Camada global de acessibilidade para todo o LearnEnglish.
 * Incluído em todos os templates (site público, admin, teacher, aluno).
 */

/* ============================================================
   Skip link — pular para o conteúdo principal
   ============================================================ */
.skip-link {
  position: absolute;
  top: -100%;
  left: 0;
  z-index: 9999;
  background: var(--color-primary, #16a34a);
  color: #fff;
  padding: 0.75rem 1rem;
  border-radius: 0 0 8px 0;
  text-decoration: none;
  font-weight: 600;
  transition: top 0.15s ease;
}

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

/* ============================================================
   Foco visível global
   ============================================================ */
*:focus {
  outline: transparent;
}

*:focus-visible {
  outline: 3px solid var(--color-primary, #16a34a);
  outline-offset: 2px;
  border-radius: 2px;
}

a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible,
[tabindex]:not([tabindex="-1"]):focus-visible,
[role="button"]:focus-visible {
  outline: 3px solid var(--color-primary, #16a34a);
  outline-offset: 2px;
}

/* Garantir foco em botões/inputs que removem outline nativo */
button:focus:not(:focus-visible),
input:focus:not(:focus-visible),
select:focus:not(:focus-visible),
textarea:focus:not(:focus-visible) {
  outline: transparent;
}

/* ============================================================
   Screen reader only / visually hidden
   ============================================================ */
.sr-only,
.visually-hidden {
  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-visible,
.visually-hidden-focusable:focus-visible {
  position: static;
  width: auto;
  height: auto;
  padding: inherit;
  margin: inherit;
  overflow: visible;
  clip: auto;
  white-space: normal;
}

/* ============================================================
   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;
  }
}

/* ============================================================
   Alto contraste
   ============================================================ */
.high-contrast,
.high-contrast * {
  background: #000 !important;
  color: #fff !important;
  border-color: #fff !important;
}

.high-contrast a,
.high-contrast button,
.high-contrast [role="button"] {
  color: #ff0 !important;
  text-decoration: underline !important;
}

.high-contrast *:focus-visible {
  outline: 3px solid #ff0 !important;
  outline-offset: 2px !important;
}

/* ============================================================
   Tamanhos de fonte acessíveis
   ============================================================ */
.text-size-sm { font-size: 0.875rem; }
.text-size-base { font-size: 1rem; }
.text-size-lg { font-size: 1.125rem; }
.text-size-xl { font-size: 1.25rem; }

/* ============================================================
   Melhorias de contraste para textos secundários
   ============================================================ */
.text-muted,
.text-secondary {
  color: inherit;
  opacity: 0.85;
}

/* ============================================================
   Links sublinhados em alto contraste e foco
   ============================================================ */
a:focus-visible {
  text-decoration: underline;
}

/* ============================================================
   Estado de erro acessível padrão
   ============================================================ */
[aria-invalid="true"],
.input-error,
.form-input[aria-invalid="true"] {
  border-color: var(--color-danger, #dc2626) !important;
  box-shadow: 0 0 0 3px rgba(220, 38, 38, 0.2);
}

/* ============================================================
   Seletor de idioma — dropdown premium com bandeiras
   ============================================================ */
.language-selector-form {
  position: relative;
  display: inline-flex;
  align-items: center;
}

/* Círculo de bandeira garantindo renderização emoji */
.language-flag-circle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.75rem;
  height: 1.75rem;
  border-radius: 50%;
  background: linear-gradient(135deg, rgba(255,255,255,0.9), rgba(255,255,255,0.7));
  box-shadow: inset 0 0 0 1px rgba(0,0,0,0.06), 0 2px 4px rgba(0,0,0,0.06);
  font-family: "Segoe UI Emoji", "Apple Color Emoji", "Noto Color Emoji", "Twemoji", sans-serif;
  font-size: 1rem;
  line-height: 1;
}

/* Trigger */
.language-selector-trigger {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.4rem 0.75rem 0.4rem 0.5rem;
  background: var(--color-surface, #fff);
  border: 1px solid var(--color-border, #e2e8f0);
  border-radius: 9999px;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.04);
  color: var(--color-text, #1e293b);
  font-size: 0.8125rem;
  font-weight: 700;
  line-height: 1;
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.language-selector-trigger:hover {
  border-color: var(--color-primary, #16a34a);
  box-shadow: 0 4px 14px rgba(22, 163, 74, 0.14);
  transform: translateY(-1px);
}

.language-selector-trigger:focus-visible {
  outline: 3px solid var(--color-primary, #16a34a);
  outline-offset: 2px;
}

.language-selector-trigger[aria-expanded="true"] {
  border-color: var(--color-primary, #16a34a);
  box-shadow: 0 0 0 3px rgba(22, 163, 74, 0.18);
}

.language-selector-trigger[aria-expanded="true"] .language-selector-trigger__chevron {
  transform: rotate(180deg);
}

.language-selector-trigger__flag {
  display: inline-flex;
  line-height: 1;
}

.language-selector-trigger__code {
  letter-spacing: 0.02em;
  min-width: 2.25rem;
  text-align: left;
}

.language-selector-trigger__chevron {
  display: inline-flex;
  color: var(--color-text-secondary, #64748b);
  transition: transform 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

.language-selector-trigger__spinner {
  display: none;
  animation: lang-selector-spin 0.8s linear infinite;
}

.language-selector-form.is-changing .language-selector-trigger__spinner {
  display: inline-flex;
}

.language-selector-form.is-changing .language-selector-trigger__chevron {
  display: none;
}

.language-selector-form.is-changing .language-selector-trigger {
  opacity: 0.8;
  cursor: wait;
}

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

/* Variante compacta (navbar desktop) */
.language-selector-trigger--compact {
  padding: 0.3rem 0.625rem 0.3rem 0.375rem;
  font-size: 0.75rem;
}

.language-selector-trigger--compact .language-flag-circle {
  width: 1.5rem;
  height: 1.5rem;
  font-size: 0.875rem;
}

/* Dropdown */
.language-selector-dropdown {
  position: absolute;
  top: calc(100% + 0.5rem);
  right: 0;
  z-index: 1000;
  min-width: 230px;
  padding: 0.5rem;
  background: var(--color-surface, #fff);
  border: 1px solid var(--color-border, #e2e8f0);
  border-radius: var(--radius, 12px);
  box-shadow: 0 16px 48px rgba(15, 23, 42, 0.14);
  opacity: 0;
  transform: translateY(-8px) scale(0.98);
  transform-origin: top right;
  pointer-events: none;
  transition: opacity 0.2s ease, transform 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.language-selector-dropdown:not([hidden]) {
  opacity: 1;
  transform: translateY(0) scale(1);
  pointer-events: auto;
}

.language-selector-option {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  width: 100%;
  padding: 0.625rem 0.75rem;
  background: transparent;
  border: 1px solid transparent;
  border-radius: var(--radius-sm, 8px);
  color: var(--color-text, #1e293b);
  font-size: 0.875rem;
  font-weight: 500;
  text-align: left;
  cursor: pointer;
  transition: background 0.15s ease, border-color 0.15s ease, transform 0.15s ease;
}

.language-selector-option:hover,
.language-selector-option:focus-visible,
.language-selector-option.is-focused {
  background: var(--emerald-50, #f0fdf4);
  border-color: rgba(22, 163, 74, 0.15);
  outline: none;
  transform: translateX(2px);
}

.language-selector-option.is-selected {
  background: var(--emerald-50, #f0fdf4);
  border-color: var(--color-primary, #16a34a);
  color: var(--color-primary, #16a34a);
}

.language-selector-option__flag {
  display: inline-flex;
  line-height: 1;
}

.language-selector-option__flag .language-flag-circle {
  width: 2rem;
  height: 2rem;
  font-size: 1.125rem;
}

.language-selector-option__label {
  flex: 1;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.language-selector-option__code {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--color-text-secondary, #64748b);
  letter-spacing: 0.02em;
}

.language-selector-option.is-selected .language-selector-option__code {
  color: var(--color-primary, #16a34a);
}

.language-selector-option__check {
  display: inline-flex;
  color: var(--color-primary, #16a34a);
}

/* Ajustes no footer (fundo escuro) */
footer .language-selector-trigger {
  background: var(--slate-800, #1e293b);
  border-color: var(--slate-700, #334155);
  color: var(--slate-300, #cbd5e1);
}

footer .language-selector-trigger:hover {
  border-color: var(--emerald-400, #34d399);
  box-shadow: 0 4px 14px rgba(52, 211, 153, 0.14);
}

footer .language-selector-trigger__chevron {
  color: var(--slate-400, #94a3b8);
}

footer .language-flag-circle {
  background: linear-gradient(135deg, rgba(255,255,255,0.12), rgba(255,255,255,0.06));
  box-shadow: inset 0 0 0 1px rgba(255,255,255,0.08), 0 2px 4px rgba(0,0,0,0.12);
}

footer .language-selector-dropdown {
  background: var(--slate-800, #1e293b);
  border-color: var(--slate-700, #334155);
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.35);
}

footer .language-selector-option {
  color: var(--slate-200, #e2e8f0);
}

footer .language-selector-option:hover,
footer .language-selector-option:focus-visible,
footer .language-selector-option.is-focused {
  background: var(--slate-700, #334155);
  border-color: var(--slate-600, #475569);
}

footer .language-selector-option.is-selected {
  background: rgba(52, 211, 153, 0.12);
  border-color: var(--emerald-400, #34d399);
  color: var(--emerald-400, #34d399);
}

footer .language-selector-option__code {
  color: var(--slate-400, #94a3b8);
}

footer .language-selector-option.is-selected .language-selector-option__code {
  color: var(--emerald-400, #34d399);
}

/* Alinhamento na navbar */
.rev-navbar-links .language-selector-form,
.pn-links .language-selector-form {
  margin-left: 0.25rem;
}

@media (max-width: 768px) {
  .rev-navbar-links .language-selector-form,
  .pn-links .language-selector-form {
    display: none;
  }
}

/* Legacy: manter estilos antigos caso ainda existam selects nativos em algum lugar */
.language-selector {
  appearance: none;
  -webkit-appearance: none;
  -moz-appearance: none;
  background-color: rgba(255, 255, 255, 0.1);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.5rem center;
  background-size: 0.75rem;
  color: inherit;
  border: 1px solid currentColor;
  border-color: rgba(255, 255, 255, 0.25);
  border-radius: 9999px;
  padding: 0.35rem 1.75rem 0.35rem 0.875rem;
  font-size: 0.8125rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
  min-width: 150px;
}