/* site.css — cinematic 3D-scroll shell. Colors come from CSS vars set per-brief. */
:root {
  --bg: #060d18;
  --accent: #39e0ff;
  --text: #dfeaf5;
  --muted: rgba(223, 234, 245, 0.55);
  --hairline: rgba(255, 255, 255, 0.12);
  --serif: "Times New Roman", Georgia, serif;
  --sans: "Helvetica Neue", Inter, Arial, sans-serif;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scrollbar-width: none; }
html::-webkit-scrollbar { display: none; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
  cursor: default;
}

/* fixed WebGL / canvas backdrop — effectively pinned so text scrolls over it */
#scene {
  position: fixed; inset: 0; width: 100vw; height: 100vh;
  display: block; z-index: 0;
}
/* film grain + vignette for cinematic depth */
.grain, .vignette { position: fixed; inset: 0; pointer-events: none; z-index: 1; }
.vignette { box-shadow: inset 0 0 340px 60px rgba(0,0,0,0.85); }
.grain {
  opacity: 0.05; mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2'/%3E%3C/filter%3E%3Crect width='120' height='120' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* content sits above the canvas */
main { position: relative; z-index: 2; }
.chapter {
  min-height: 100vh; display: flex; align-items: center;
  padding: 12vh 8vw; position: relative;
}
.chapter[data-align="center"] { justify-content: center; text-align: center; }
.chapter[data-align="right"] { justify-content: flex-end; text-align: right; }
.chapter-inner { max-width: 720px; will-change: transform, opacity; }

.kicker {
  font-size: 13px; letter-spacing: 0.42em; text-transform: uppercase;
  color: var(--accent); margin-bottom: 22px; font-weight: 600;
}
.chapter h1 {
  font-family: var(--serif); font-weight: 400; line-height: 0.98;
  font-size: clamp(48px, 8.5vw, 132px); letter-spacing: -0.01em;
}
.chapter h2 {
  font-family: var(--serif); font-weight: 400; line-height: 1.02;
  font-size: clamp(34px, 5.2vw, 74px); letter-spacing: -0.01em; margin-bottom: 8px;
}
.chapter p.lead { margin-top: 26px; font-size: clamp(16px, 1.5vw, 21px); color: var(--muted); max-width: 46ch; line-height: 1.55; }
/* O parágrafo é mais estreito que o .chapter-inner (46ch contra 720px). Sem
   margem automática ele encosta à esquerda do contêiner, e a borda direita do
   texto termina antes da borda do título — o alinhamento à direita fica
   quebrado por uns 260px. */
.chapter[data-align="right"] p.lead { margin-left: auto; margin-right: 0; }
.chapter[data-align="center"] p.lead { margin-left: auto; margin-right: auto; }
.hero-sub { margin-top: 30px; font-size: 15px; letter-spacing: 0.2em; text-transform: uppercase; color: var(--muted); }

/* spec strip */
.specs { display: flex; flex-wrap: wrap; gap: 44px; margin-top: 40px; }
.spec { border-top: 1px solid var(--hairline); padding-top: 12px; min-width: 120px; }
.spec .k { font-size: 11px; letter-spacing: 0.28em; text-transform: uppercase; color: var(--muted); }
.spec .v { font-family: var(--serif); font-size: 30px; margin-top: 6px; }

/* CTA */
.cta { text-align: center; }
.cta .btn {
  display: inline-block; margin-top: 30px; padding: 16px 40px; border: 1px solid var(--accent);
  color: var(--accent); text-decoration: none; letter-spacing: 0.22em; text-transform: uppercase; font-size: 13px;
  transition: background 0.3s, color 0.3s;
}
.cta .btn:hover { background: var(--accent); color: #000; }

/* fixed HUD (depth / speed / floor counter) */
.hud {
  position: fixed; top: 0; right: 0; height: 100vh; width: 92px; z-index: 3;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 14px; pointer-events: none;
}
.hud .rail { position: relative; width: 2px; height: 42vh; background: var(--hairline); overflow: hidden; }
.hud .rail #hud-bar { position: absolute; inset: 0; transform-origin: top; background: var(--accent); transform: scaleY(0); }
.hud .label { writing-mode: vertical-rl; font-size: 10px; letter-spacing: 0.4em; text-transform: uppercase; color: var(--muted); }
.hud #hud-value { writing-mode: vertical-rl; font-family: var(--sans); font-size: 13px; letter-spacing: 0.14em; color: var(--accent); }

/* top brand bar + scroll cue */
.topbar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 4; display: flex; justify-content: space-between;
  padding: 26px 34px; font-size: 12px; letter-spacing: 0.3em; text-transform: uppercase; color: var(--muted);
  mix-blend-mode: difference;
}
.scrollcue {
  position: fixed; bottom: 26px; left: 50%; transform: translateX(-50%); z-index: 4;
  font-size: 11px; letter-spacing: 0.4em; text-transform: uppercase; color: var(--muted);
  animation: bob 2.4s ease-in-out infinite;
}
@keyframes bob { 0%,100% { transform: translate(-50%, 0); opacity: 0.5; } 50% { transform: translate(-50%, 8px); opacity: 1; } }

/* menu / secondary content */
.menu-cols { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; margin-top: 40px; }
.menu-cols .row { display: flex; justify-content: space-between; border-bottom: 1px solid var(--hairline); padding: 14px 0; }
.menu-cols h3 { font-family: var(--serif); font-weight: 400; font-size: 26px; margin-bottom: 12px; color: var(--accent); }

@media (max-width: 720px) {
  .chapter { padding: 12vh 7vw; }
  .menu-cols { grid-template-columns: 1fr; gap: 30px; }
  .specs { gap: 24px; }
  .hud { width: 60px; }

  /* Numa tela estreita e vertical não existe "do lado": a cena 3D fica
     exatamente atrás do texto, e um parágrafo cinza sobre as barras douradas
     vira ilegível. Esta camada devolve o contraste sem esconder o anel — ele
     continua visível através dela, só recuado para o segundo plano. */
  .chapter-inner {
    position: relative;
    padding: 26px 22px 28px;
    border-radius: 16px;
    background: rgba(8, 10, 14, 0.86);            /* usado onde color-mix não existe */
    background: color-mix(in srgb, var(--bg) 86%, transparent);
    backdrop-filter: blur(7px);
    -webkit-backdrop-filter: blur(7px);
    border: 1px solid var(--hairline);
  }

  /* O corpo de texto usa --muted a 55% de opacidade, pensado para fundo liso.
     Sobre a camada translúcida ele fica fraco demais; aqui sobe para 78%. */
  .chapter p.lead { color: rgba(255, 255, 255, 0.78); }

  /* No vertical, alinhar à direita empurra o texto para longe do polegar e
     não sobra contraste de layout com a cena. Tudo à esquerda. */
  .chapter[data-align="right"] { justify-content: flex-start; text-align: left; }
  .chapter[data-align="right"] p.lead { margin-left: 0; }
}

/* loading veil until the engine reports ready */
#veil { position: fixed; inset: 0; z-index: 9; background: var(--bg); display: flex; align-items: center; justify-content: center; transition: opacity 0.8s; }
#veil.gone { opacity: 0; pointer-events: none; }
#veil .mark { font-family: var(--serif); font-size: 40px; letter-spacing: 0.1em; }
#veil .bar { position: absolute; bottom: 20%; width: 160px; height: 1px; background: var(--hairline); overflow: hidden; }
#veil .bar i { position: absolute; inset: 0; width: 40%; background: var(--accent); animation: slide 1.1s ease-in-out infinite; }
@keyframes slide { 0% { left: -40%; } 100% { left: 100%; } }


/* ── sem WebGL ───────────────────────────────────────────────────────────────
   O motor marca <html class="sem-3d"> quando não consegue contexto 3D. Sem a
   cena atrás, o texto precisa de um fundo próprio e de mais respiro — senão a
   página fica um bloco de parágrafos soltos num vazio. */
.sem-3d body { background: var(--bg); }
.sem-3d .chapter { min-height: auto; padding: 9vh 7vw; }
.sem-3d .chapter-inner { opacity: 1 !important; visibility: visible !important; transform: none !important; }
.sem-3d .hud { display: none; }
.sem-3d .chapter + .chapter { border-top: 1px solid var(--hairline); }
.sem-3d .chapter p.lead { color: rgba(255, 255, 255, 0.72); }

/* ── prefers-reduced-motion ──────────────────────────────────────────────────
   Desliga o que se move sozinho: a seta que pulsa, as transições e as
   revelações. O que responde à rolagem continua, porque quem comanda é o
   usuário — o problema é movimento involuntário, não movimento pedido. */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
  .chapter-inner { opacity: 1 !important; visibility: visible !important; transform: none !important; }
}

/* seletor de idioma no topo — link de verdade, funciona sem JavaScript */
.lang { display: flex; gap: 10px; align-items: center; }
.lang span[aria-current] { color: var(--text); }
.lang a { color: var(--muted); text-decoration: none; border-bottom: 1px solid transparent; }
.lang a:hover, .lang a:focus-visible { color: var(--accent); border-bottom-color: var(--accent); }