/* =========================================================
   Navegação
   Desktop (≥ 900px): pílula de vidro escuro centralizada no topo.
     - indicador que desliza até a seção ativa (com ponto vermelho)
     - linha de progresso da página na base da pílula
     - some ao rolar para baixo e volta ao rolar para cima
   Celular: botão redondo flutuante (canto superior direito) que abre
     um menu em tela cheia com links grandes e numerados.
   ========================================================= */

.nav {
  --glass: rgb(14 14 14 / 0.58);
  --glass-line: rgb(255 255 255 / 0.09);
  position: fixed;
  z-index: 900;
  top: 18px;
  left: 50%;
  transform: translate3d(-50%, 0, 0);
  transition: transform 0.7s var(--ease-out), opacity 0.5s var(--ease-out);
  font-family: "Inter", "Helvetica Neue", Arial, sans-serif;
}
.nav.is-hidden:not(.is-open) { transform: translate3d(-50%, -160%, 0); opacity: 0; }

/* Some até o pré-loader terminar (o JS mostra com animação) */
.js .nav:not(.is-ready) { opacity: 0; pointer-events: none; }

/* ---------- Pílula (desktop) ---------- */
.nav__bar {
  position: relative;
  display: flex;
  align-items: center;
  gap: 2px;
  padding: 6px;
  border: 1px solid var(--glass-line);
  border-radius: 999px;
  background: var(--glass);
  -webkit-backdrop-filter: blur(18px) saturate(160%);
          backdrop-filter: blur(18px) saturate(160%);
  box-shadow:
    0 12px 40px rgb(0 0 0 / 0.45),
    inset 0 1px 0 rgb(255 255 255 / 0.06);
}

.nav__links { display: flex; gap: 2px; margin: 0; padding: 0; list-style: none; }

.nav__link {
  position: relative;
  z-index: 1;
  display: block;
  padding: 10px 17px;
  border-radius: 999px;
  color: rgb(255 255 255 / 0.6);
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.01em;
  text-decoration: none;
  white-space: nowrap;
  transition: color 0.4s var(--ease-out);
}
.nav__link:hover,
.nav__link.is-active { color: #fff; }

.nav__link:focus-visible,
.nav__toggle:focus-visible,
.menu__link:focus-visible {
  outline: 2px solid var(--c-accent);
  outline-offset: 3px;
}

/* Fundo que desliza até o link ativo (posição/largura pelo JS) */
.nav__indicator {
  position: absolute;
  z-index: 0;
  top: 6px;
  left: 0;
  height: calc(100% - 12px);
  width: 0;
  border-radius: 999px;
  background: rgb(255 255 255 / 0.1);
  box-shadow: inset 0 1px 0 rgb(255 255 255 / 0.08);
  pointer-events: none;
}
.nav__indicator::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 4px;
  width: 4px;
  height: 4px;
  margin-left: -2px;
  border-radius: 50%;
  background: var(--c-accent);
  box-shadow: 0 0 8px rgb(210 37 0 / 0.9);
}

/* Progresso da página */
.nav__progress {
  position: absolute;
  left: 28px;
  right: 28px;
  bottom: -1px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--c-accent) 20%, var(--c-accent) 80%, transparent);
  transform: scaleX(0);
  transform-origin: left center;
  pointer-events: none;
}

/* ---------- Botão do menu (celular) ---------- */
.nav__toggle {
  position: relative;
  display: none;
  width: 48px;
  height: 48px;
  padding: 0;
  border: 1px solid var(--glass-line);
  border-radius: 50%;
  background: var(--glass);
  -webkit-backdrop-filter: blur(18px) saturate(160%);
          backdrop-filter: blur(18px) saturate(160%);
  box-shadow: 0 10px 30px rgb(0 0 0 / 0.45), inset 0 1px 0 rgb(255 255 255 / 0.06);
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}
.nav__toggle span {
  position: absolute;
  left: 50%;
  top: 50%;
  width: 18px;
  height: 1.5px;
  margin-left: -9px;
  border-radius: 2px;
  background: #fff;
  transition: transform 0.6s var(--ease-out), width 0.6s var(--ease-out), background-color 0.4s;
}
.nav__toggle span:nth-child(1) { transform: translateY(-4px); }
.nav__toggle span:nth-child(2) { transform: translateY(4px); width: 12px; }
.nav.is-open .nav__toggle span:nth-child(1) { transform: rotate(45deg); }
.nav.is-open .nav__toggle span:nth-child(2) { transform: rotate(-45deg); width: 18px; }

@media (max-width: 899.98px) {
  .nav {
    top: 16px;
    left: auto;
    right: 16px;
    transform: none;
  }
  .nav.is-hidden:not(.is-open) { transform: translate3d(0, -160%, 0); }
  .nav__bar { display: none; }
  .nav__toggle { display: block; }
}

/* ---------- Menu em tela cheia (celular) ---------- */
.menu {
  position: fixed;
  z-index: 890;              /* abaixo do botão, que vira o "fechar" */
  inset: 0;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 104px 28px max(32px, env(safe-area-inset-bottom));
  overflow: hidden;
  background: #070707;
  color: var(--c-text);
}
.menu[hidden] { display: none; }

.menu__glow {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(120% 70% at 100% 0%, rgb(210 37 0 / 0.24), transparent 55%),
    radial-gradient(90% 60% at 0% 100%, rgb(210 37 0 / 0.1), transparent 60%);
  pointer-events: none;
}

.menu__nav { position: relative; }
.menu__list { margin: 0; padding: 0; list-style: none; }

.menu__item { border-bottom: 1px solid rgb(255 255 255 / 0.08); }
.menu__item:first-child { border-top: 1px solid rgb(255 255 255 / 0.08); }

.menu__link {
  display: flex;
  align-items: baseline;
  gap: 16px;
  padding: 14px 2px;
  color: inherit;
  text-decoration: none;
  -webkit-tap-highlight-color: transparent;
}
.menu__num {
  min-width: 2ch;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: rgb(255 255 255 / 0.45);
  font-variant-numeric: tabular-nums;
}
.menu__label {
  display: block;
  overflow: hidden;
  padding-bottom: 0.08em;
  font-family: var(--f-display);
  font-weight: 700;
  font-size: clamp(34px, 10.5vw, 52px);
  line-height: 1.08;
  letter-spacing: -0.01em;
}
.menu__label > span { display: block; transition: color 0.4s var(--ease-out); }
.menu__link.is-active .menu__label > span { color: var(--c-accent); }
.menu__link.is-active .menu__num { color: var(--c-accent); }

.menu__foot {
  position: relative;
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0;
  font-family: "Inter", "Helvetica Neue", Arial, sans-serif;
  font-size: 13px;
  letter-spacing: 0.06em;
  color: rgb(255 255 255 / 0.55);
}
.menu__dot { width: 4px; height: 4px; border-radius: 50%; background: var(--c-accent); }
.menu__accent { color: #fff; }

/* Trava a rolagem com o menu aberto */
html.menu-open,
html.menu-open body { overflow: hidden; }

@media (min-width: 900px) {
  .menu { display: none !important; }
}

@media (prefers-reduced-motion: reduce) {
  .nav, .nav__toggle span, .nav__link { transition: none; }
}