/* ═══════════════════════════════════════
   NAV — Navegação, toggle de tema
         e botão de acessibilidade
   ═══════════════════════════════════════ */

nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 28px 60px;
  background: transparent;
  background-color: #5b4ebc;
  color: #fff;
  border-bottom: 1px solid transparent;
  transition: background 0.4s ease,
    border-color 0.4s ease,
    padding 0.4s ease,
    backdrop-filter 0.4s ease;
}

/* Após scroll — ganha fundo */
nav.scrolled {
  background: var(--bg-nav);
  backdrop-filter: blur(14px);
  border-bottom-color: var(--border);
  padding: 18px 60px;
}

.nav-logo {
  font-family: 'Cormorant Garamond', serif;
  font-size: 1.1rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--fg);
  text-decoration: none;
  transition: color 0.4s;
}

.nav-logo span {
  color: var(--cyan);
}

nav ul {
  list-style: none;
  display: flex;
  gap: 40px;
  align-items: center;
}

nav ul a {
  text-decoration: none;
  color: var(--fg-muted);
  color: #fff !important;
  font-size: 0.78rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  transition: color 0.3s;
}

nav ul a:hover {
  color: var(--cyan);
}

/* ── BOTÃO DE ACESSIBILIDADE ── */
.nav-a11y-item {
  position: relative;
}

.nav-a11y-btn {
  display: flex;
  align-items: center;
  gap: 7px;
  background: transparent;
  border: 1px solid #fff;
  color: #FFF;
  font-family: 'Outfit', sans-serif;
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 7px 14px;
  border-radius: 100px;
  cursor: pointer;
  transition: all 0.25s;
  white-space: nowrap;
}

.nav-a11y-btn:hover,
.nav-a11y-btn.open {
  border-color: var(--cyan);
  color: var(--cyan);
}

/* ── Dropdown ── */
.a11y-dropdown {
  position: absolute;
  top: calc(100% + 12px);
  right: 0;
  background: var(--bg-card);
  border: 1px solid var(--border-mid);
  border-radius: 6px;
  padding: 8px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 180px;
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.3);
  opacity: 0;
  pointer-events: none;
  transform: translateY(-6px);
  transition: opacity 0.2s ease, transform 0.2s ease;
}

.a11y-dropdown.open {
  opacity: 1;
  pointer-events: all;
  transform: translateY(0);
}

.a11y-opt {
  display: flex;
  align-items: center;
  gap: 10px;
  background: transparent;
  border: none;
  color: var(--fg-muted);
  font-family: 'Outfit', sans-serif;
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 10px 12px;
  border-radius: 4px;
  cursor: pointer;
  width: 100%;
  text-align: left;
  transition: all 0.2s;
}

.a11y-opt:hover {
  background: var(--border);
  color: var(--fg);
}

.a11y-opt.active {
  background: rgba(0, 229, 255, 0.08);
  color: var(--cyan);
}

html.light .a11y-opt.active {
  background: rgba(91, 79, 192, 0.08);
  color: var(--purple);
}

/* ── TOGGLE DE TEMA ── */
.theme-toggle {
  position: relative;
  width: 52px;
  height: 28px;
  cursor: pointer;
  flex-shrink: 0;
}

.theme-toggle input {
  opacity: 0;
  width: 0;
  height: 0;
  position: absolute;
}

.toggle-track {
  position: absolute;
  inset: 0;
  background: var(--toggle-track);
  border: 1px solid var(--border-mid);
  border-radius: 100px;
  transition: background 0.4s, border-color 0.4s;
}

.toggle-knob {
  position: absolute;
  top: 3px;
  left: 3px;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--toggle-knob);
  transition: transform 0.35s cubic-bezier(0.34, 1.56, 0.64, 1), background 0.4s;
  display: flex;
  align-items: center;
  justify-content: center;
}

.theme-toggle input:checked~.toggle-track {
  background: rgba(91, 79, 192, 0.15);
  border-color: rgba(91, 79, 192, 0.4);
}

html:not(.light) .theme-toggle input:checked~.toggle-track {
  background: rgba(0, 229, 255, 0.15);
  border-color: rgba(0, 229, 255, 0.3);
}

.theme-toggle input:checked~.toggle-knob {
  transform: translateX(24px);
}

.toggle-icons {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 6px;
  pointer-events: none;
}

.toggle-icons svg {
  width: 11px;
  height: 11px;
  transition: opacity 0.3s;
}

.icon-moon {
  color: var(--fg-faint);
}

.icon-sun {
  color: var(--cyan);
  opacity: 0.5;
}

html.light .icon-moon {
  opacity: 0.5;
}

html.light .icon-sun {
  opacity: 1;
}

/* ── ACESSIBILIDADE — só progress bar permanece fixo ── */
[vw-access-button] {
  display: none !important;
}

#tts-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  background: var(--cyan);
  width: 0%;
  z-index: 300;
  transition: width 0.3s ease;
  pointer-events: none;
}

/* ── RESPONSIVO ── */
@media (max-width: 900px) {
  nav {
    padding: 20px 24px;
  }

  nav.scrolled {
    padding: 16px 24px;
  }

  nav ul {
    display: none;
  }
}