/* B2 Sistemas — Navegação fixa (Ember Grid)
   Contrato JS (js/main.js): adiciona/remove .scrolled e .open no header,
   e .active no link da seção visível. Este arquivo só estiliza. */

:root { --nav-h: 76px; }
@media (max-width: 760px) { :root { --nav-h: 64px; } }

/* ---------- Header ---------- */

.site-nav {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 1000;
  border-bottom: 1px solid transparent;
  transition: border-color 0.45s var(--ease-out);
}

/* Fundo blur em pseudo-elemento: aplicar backdrop-filter direto no header
   criaria containing block e quebraria o position:fixed do painel mobile. */
.site-nav::before {
  content: "";
  position: absolute;
  inset: 0;
  background: rgba(11, 9, 6, 0.82);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  opacity: 0;
  transition: opacity 0.45s var(--ease-out);
  pointer-events: none;
}

.site-nav.scrolled,
.site-nav.open { border-color: var(--line); }

.site-nav.scrolled::before,
.site-nav.open::before { opacity: 1; }

.nav-inner {
  position: relative;
  display: flex;
  align-items: center;
  gap: clamp(14px, 2vw, 26px);
  height: var(--nav-h);
}

/* ---------- Logo ---------- */

.nav-logo {
  display: inline-flex;
  align-items: center;
  flex: none;
  margin-right: auto;
}

.nav-logo img {
  height: 30px;
  width: auto;
  transition: opacity 0.25s var(--ease-out);
}

.nav-logo:hover img { opacity: 0.85; }

@media (max-width: 760px) {
  .nav-logo img { height: 26px; }
}

/* ---------- Links (desktop) ---------- */

.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
  counter-reset: navlink;
}

.nav-links a {
  position: relative;
  padding: 9px 9px;
  font-size: 0.92rem;
  font-weight: 500;
  letter-spacing: 0.01em;
  color: var(--ink-2);
  white-space: nowrap;
  counter-increment: navlink;
  transition: color 0.25s var(--ease-out);
}

.nav-links a:hover { color: var(--ink-1); }

/* Indicador da seção ativa: texto claro + dot laranja */
.nav-links a::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 0;
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--brand);
  box-shadow: 0 0 10px 1px rgba(252, 157, 19, 0.55);
  transform: translateX(-50%) scale(0);
  transition: transform 0.3s var(--ease-out);
}

.nav-links a.active { color: var(--ink-1); }
.nav-links a.active::after { transform: translateX(-50%) scale(1); }

/* Divisor entre âncoras da one-page e as páginas avulsas */
.nav-links a[href="download.html"] {
  margin-left: 10px;
  padding-left: 20px;
  border-left: 1px solid var(--line-strong);
}

/* Válvula de segurança logo acima do breakpoint mobile */
@media (min-width: 1081px) and (max-width: 1240px) {
  .nav-links a { padding-inline: 6px; font-size: 0.88rem; }
  .nav-links a[href="download.html"] { padding-left: 16px; margin-left: 8px; }
}

/* ---------- CTA ---------- */

.site-nav .nav-cta {
  flex: none;
  min-height: 44px;
  padding: 0 22px;
  font-size: 0.92rem;
}

@media (max-width: 560px) {
  .site-nav .nav-cta { display: none; }
}

/* ---------- Botão hambúrguer ---------- */

.nav-toggle {
  display: none;
  position: relative;
  z-index: 2;
  flex: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  margin-right: -8px;
  border-radius: 50%;
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  border-radius: 2px;
  background: var(--ink-1);
  transition: transform 0.35s var(--ease-out), opacity 0.25s var(--ease-out);
}

.site-nav.open .nav-toggle span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.site-nav.open .nav-toggle span:nth-child(2) { opacity: 0; transform: scaleX(0.3); }
.site-nav.open .nav-toggle span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- Menu mobile (painel fullscreen) ---------- */

@media (max-width: 1080px) {
  .nav-toggle { display: inline-flex; }

  .nav-links {
    position: fixed;
    inset: var(--nav-h) 0 0 0;
    z-index: 1;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 18px var(--gutter) calc(48px + env(safe-area-inset-bottom, 0px));
    overflow-y: auto;
    overscroll-behavior: contain;
    background: rgba(11, 9, 6, 0.96);
    -webkit-backdrop-filter: blur(18px);
    backdrop-filter: blur(18px);
    visibility: hidden;
    opacity: 0;
    transform: translateY(-14px);
    transition:
      opacity 0.4s var(--ease-out),
      transform 0.4s var(--ease-out),
      visibility 0s 0.45s;
  }

  .site-nav.open .nav-links {
    visibility: visible;
    opacity: 1;
    transform: none;
    transition:
      opacity 0.4s var(--ease-out),
      transform 0.4s var(--ease-out),
      visibility 0s 0s;
  }

  .nav-links a {
    display: flex;
    align-items: baseline;
    gap: 16px;
    padding: 19px 4px;
    border-bottom: 1px solid var(--line);
    font-family: var(--font-display);
    font-size: clamp(1.5rem, 5.6vw, 2rem);
    font-weight: 600;
    letter-spacing: -0.01em;
    opacity: 0;
    transform: translateY(18px);
    transition:
      opacity 0.45s var(--ease-out),
      transform 0.45s var(--ease-out),
      color 0.25s var(--ease-out);
  }

  .nav-links a::after { display: none; }

  /* Numeração técnica 01–08 via counter */
  .nav-links a::before {
    content: "0" counter(navlink);
    font-family: var(--font-mono);
    font-size: 0.68rem;
    font-weight: 600;
    letter-spacing: 0.12em;
    color: var(--ink-3);
    transition: color 0.25s var(--ease-out);
  }

  .nav-links a.active::before { color: var(--brand); }

  .nav-links a[href="download.html"] {
    margin-left: 0;
    margin-top: 14px;
    padding-left: 4px;
    border-left: 0;
  }

  /* Stagger de entrada dos links */
  .site-nav.open .nav-links a { opacity: 1; transform: none; }
  .site-nav.open .nav-links a:nth-child(1) { transition-delay: 0.06s; }
  .site-nav.open .nav-links a:nth-child(2) { transition-delay: 0.1s; }
  .site-nav.open .nav-links a:nth-child(3) { transition-delay: 0.14s; }
  .site-nav.open .nav-links a:nth-child(4) { transition-delay: 0.18s; }
  .site-nav.open .nav-links a:nth-child(5) { transition-delay: 0.22s; }
  .site-nav.open .nav-links a:nth-child(6) { transition-delay: 0.26s; }
  .site-nav.open .nav-links a:nth-child(7) { transition-delay: 0.3s; }
  .site-nav.open .nav-links a:nth-child(8) { transition-delay: 0.34s; }
}

/* Trava o scroll da página enquanto o painel mobile está aberto */
html:has(.site-nav.open) { overflow: clip; }