/* ============================================================
   BASE — reset, tipografia, layout primitivo e utilitários.
   ============================================================ */

*,
*::before,
*::after { box-sizing: border-box; }

* { margin: 0; padding: 0; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-h) + 24px);
  -moz-tab-size: 2;
  tab-size: 2;
}

body {
  min-height: 100svh;
  background: var(--bg-0);
  color: var(--txt-1);
  font-family: var(--font-sans);
  font-size: var(--fs-body);
  line-height: var(--lh-relaxed);
  letter-spacing: var(--tr-normal);
  font-synthesis-weight: none;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

/* Brilho ambiente fixo — dá profundidade sem custo de repaint. */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background:
    radial-gradient(60rem 40rem at 15% -10%, rgba(90, 131, 240, 0.09), transparent 65%),
    radial-gradient(50rem 35rem at 90% 5%, rgba(90, 131, 240, 0.05), transparent 60%);
}

img,
picture,
video,
canvas,
svg { display: block; max-width: 100%; }

img,
video { height: auto; }

input,
button,
textarea,
select { font: inherit; color: inherit; }

button { background: none; border: 0; cursor: pointer; }

a { color: inherit; text-decoration: none; }

ul,
ol { list-style: none; }

::selection {
  background: rgba(90, 131, 240, 0.32);
  color: #fff;
}

/* ---------- FOCO ---------- */
:focus { outline: none; }

:focus-visible {
  outline: 2px solid var(--accent-soft);
  outline-offset: 3px;
  border-radius: var(--r-xs);
}

.skip-link {
  position: fixed;
  top: var(--sp-4);
  left: var(--sp-4);
  z-index: var(--z-toast);
  padding: var(--sp-3) var(--sp-5);
  background: var(--bg-3);
  border: 1px solid var(--line-2);
  border-radius: var(--r-full);
  font-size: var(--fs-sm);
  font-weight: 500;
  transform: translateY(-200%);
  transition: transform var(--d-base) var(--ease-out);
}
.skip-link:focus-visible { transform: translateY(0); }

/* ---------- SCROLLBAR ---------- */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: var(--bg-0); }
::-webkit-scrollbar-thumb {
  background: #1e1e26;
  border: 2px solid var(--bg-0);
  border-radius: var(--r-full);
}
::-webkit-scrollbar-thumb:hover { background: #2c2c37; }

/* ============================================================
   TIPOGRAFIA
   ============================================================ */

h1, h2, h3, h4, h5 {
  font-weight: 500;
  line-height: var(--lh-snug);
  letter-spacing: var(--tr-snug);
  text-wrap: balance;
}

.display {
  font-size: var(--fs-display);
  font-weight: 500;
  line-height: var(--lh-tight);
  letter-spacing: var(--tr-tight);
}

.h1 { font-size: var(--fs-h1); letter-spacing: var(--tr-tight); line-height: 1.06; }
.h2 { font-size: var(--fs-h2); letter-spacing: var(--tr-tight); line-height: 1.1; }
.h3 { font-size: var(--fs-h3); }
.h4 { font-size: var(--fs-h4); }

/* Palavra em serifa itálica — assinatura editorial dos títulos. */
.em {
  font-family: var(--font-serif);
  font-style: italic;
  font-weight: 400;
  letter-spacing: -0.015em;
  background: linear-gradient(120deg, var(--accent-bright), var(--accent));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  padding-right: 0.06em;
}

.lead {
  font-size: var(--fs-lg);
  line-height: var(--lh-relaxed);
  color: var(--txt-2);
  text-wrap: pretty;
}

.muted { color: var(--txt-2); }
.dim { color: var(--txt-3); }

.mono {
  font-family: var(--font-mono);
  font-size: var(--fs-mono);
  letter-spacing: 0.02em;
  font-variant-ligatures: none;
}

/* Rótulo em maiúsculas acima dos títulos de seção. */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  font-family: var(--font-mono);
  font-size: var(--fs-mono);
  font-weight: 500;
  letter-spacing: var(--tr-wide);
  text-transform: uppercase;
  color: var(--accent-soft);
}
.eyebrow::before {
  content: '';
  width: 20px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent));
}

/* ============================================================
   LAYOUT
   ============================================================ */

.container {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--gutter);
}
.container--wide { max-width: var(--maxw-wide); }
.container--narrow { max-width: var(--maxw-narrow); }

.section {
  position: relative;
  z-index: var(--z-base);
  padding-block: var(--section-y);
  scroll-margin-top: var(--nav-h);
}

/* Só renderiza o que entra em tela — ganho real de performance. */
.section--defer {
  content-visibility: auto;
  contain-intrinsic-size: auto 900px;
}

.section__head {
  display: flex;
  flex-direction: column;
  gap: var(--sp-5);
  max-width: 680px;
  margin-bottom: clamp(2.5rem, 1.5rem + 3vw, 4.5rem);
}
.section__head--center {
  align-items: center;
  text-align: center;
  margin-inline: auto;
}
.section__head--wide { max-width: 820px; }

.hairline {
  height: 1px;
  border: 0;
  background: linear-gradient(90deg, transparent, var(--line-2) 18%, var(--line-2) 82%, transparent);
}

.grid { display: grid; gap: var(--sp-6); }
.stack { display: flex; flex-direction: column; }
.row { display: flex; align-items: center; }
.wrap { flex-wrap: wrap; }

/* ---------- UTILITÁRIOS ---------- */
.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

.noise {
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0.035;
  mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3'/%3E%3C/filter%3E%3Crect width='140' height='140' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* ============================================================
   SCROLL REVEAL — controlado por IntersectionObserver.
   ============================================================ */

[data-reveal] {
  opacity: 0;
  transform: translate3d(0, 22px, 0);
  transition:
    opacity var(--d-reveal) var(--ease-out),
    transform var(--d-reveal) var(--ease-out);
  transition-delay: var(--reveal-delay, 0ms);
  will-change: opacity, transform;
}
[data-reveal='left']  { transform: translate3d(-26px, 0, 0); }
[data-reveal='right'] { transform: translate3d(26px, 0, 0); }
[data-reveal='scale'] { transform: scale(0.96); }
[data-reveal='fade']  { transform: none; }

[data-reveal].is-visible {
  opacity: 1;
  transform: none;
  will-change: auto;
}

/* Sem JS ou com movimento reduzido, tudo permanece visível. */
.no-js [data-reveal] { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  [data-reveal] { opacity: 1 !important; transform: none !important; }
}

/* ---------- Barra de progresso do scroll ---------- */
.progress {
  position: fixed;
  inset: 0 0 auto 0;
  height: 2px;
  z-index: var(--z-toast);
  pointer-events: none;
  background: transparent;
}
.progress__bar {
  height: 100%;
  width: 100%;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--accent), var(--accent-bright));
  box-shadow: 0 0 12px var(--accent-glow);
}

/* ---------- Transição de entrada da página ---------- */
body { opacity: 1; }
body.is-leaving {
  opacity: 0;
  transition: opacity 220ms var(--ease-smooth);
}