/* ==========================================================================
   base.css — reset + tipografia global + utilitários de animação
   ========================================================================== */

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

* { margin: 0; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  font-weight: var(--weight-sans-light);
  font-size: var(--type-body);
  line-height: var(--leading-normal);
  color: var(--color-ink);
  background-color: var(--color-paper);
  -webkit-font-smoothing: antialiased;   /* mandatório (Design.md › Accessibility) */
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

/* Correntes de vento — camada de fundo sutil (z-grid), deriva lenta e contínua */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: var(--z-grid);
  pointer-events: none;
  background-image: url("data:image/svg+xml;utf8,%3Csvg xmlns='http://www.w3.org/2000/svg' width='240' height='96'%3E%3Cpath d='M-20 20 Q 40 0, 80 20 T 180 20 T 280 20' stroke='rgba(28,25,23,0.05)' stroke-width='1' fill='none'/%3E%3Cpath d='M-20 58 Q 40 38, 80 58 T 180 58 T 280 58' stroke='rgba(28,25,23,0.035)' stroke-width='1' fill='none'/%3E%3C/svg%3E");
  background-size: 240px 96px;
  background-repeat: repeat;
}
@media (prefers-reduced-motion: no-preference) {
  body::before {
    animation: windDrift 50s linear infinite;
  }
}
@keyframes windDrift {
  from { background-position: 0 0; }
  to   { background-position: 240px 0; }
}
body.is-preloading { overflow: hidden; }
body.is-preloading::before { animation-play-state: paused; }

img, video, svg { display: block; max-width: 100%; }
img, video { height: auto; }

/* --- Preloader ------------------------------------------------------------
   Cobre a tela no carregamento inicial; nenhuma animação de seção (reveal,
   contadores, sequência da hero) começa antes dele terminar — ver main.js. */
.preloader {
  position: fixed; inset: 0;
  z-index: var(--z-preloader);
  display: flex; align-items: center; justify-content: center;
  background: var(--color-ink);
  overflow: hidden;
  transition: opacity 0.9s var(--ease-out), visibility 0.9s var(--ease-out);
}
.preloader__video {
  position: absolute; inset: 0;
  width: 100%; height: 100%;
  object-fit: cover;
  opacity: 0.55;
}
.preloader__overlay {
  position: absolute; inset: 0;
  background:
    radial-gradient(circle at 50% 50%, rgba(28,25,23,0.35) 0%, rgba(28,25,23,0.78) 75%, rgba(28,25,23,0.92) 100%),
    linear-gradient(180deg, rgba(28,25,23,0.5) 0%, rgba(28,25,23,0.25) 40%, rgba(28,25,23,0.7) 100%);
}
.preloader__inner {
  position: relative; z-index: 1;
  display: flex; flex-direction: column; align-items: center; gap: var(--space-xxl);
  padding: 0 var(--space-lg);
  opacity: 0; transform: translateY(10px);
  animation: preloaderIn 1s var(--ease-out) 0.15s forwards;
}
.preloader__logo { height: clamp(28px, 4vw, 44px); width: auto; }
.preloader__status {
  display: flex; flex-direction: column; align-items: center; gap: var(--space-md);
  width: min(280px, 70vw);
}
.preloader__bar {
  position: relative;
  width: 100%; height: 1px;
  background: var(--color-paper-45);
  overflow: hidden;
}
.preloader__bar-fill {
  position: absolute; inset: 0 auto 0 0;
  width: 40%;
  background: var(--color-paper);
  animation: preloaderBar 1.6s ease-in-out infinite;
}
.preloader__label {
  font-family: var(--font-mono); font-weight: var(--weight-mono-light);
  font-size: var(--type-label-sm); letter-spacing: var(--tracking-mono);
  text-transform: uppercase; color: var(--color-paper-70);
  text-align: center;
}
@keyframes preloaderIn {
  from { opacity: 0; transform: translateY(10px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes preloaderBar {
  0%   { transform: translateX(-100%); }
  100% { transform: translateX(250%); }
}
.preloader.is-done { opacity: 0; visibility: hidden; pointer-events: none; }

@media (prefers-reduced-motion: reduce) {
  .preloader__inner { animation: none; opacity: 1; transform: none; }
  .preloader__bar-fill { animation: none; width: 100%; }
}

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

button { font-family: inherit; cursor: pointer; border: none; background: none; color: inherit; }

ul, ol { list-style: none; padding: 0; }

input, textarea, select { font-family: inherit; font-size: inherit; color: inherit; }

/* --- Tipografia --------------------------------------------------------- */
h1, h2, h3, h4 {
  font-family: var(--font-serif);
  font-weight: var(--weight-serif-light);
  line-height: var(--leading-snug);
  letter-spacing: var(--tracking-tight);
  text-wrap: balance;
}

p { text-wrap: pretty; }

.display-xl { font-size: var(--type-display-xl); line-height: var(--leading-tight); }
.display-lg { font-size: var(--type-display-lg); line-height: var(--leading-tight); }
.display-md { font-size: var(--type-display-md); }
.display-sm { font-size: var(--type-display-sm); }

.serif-italic { font-style: italic; }

.lead {
  font-size: var(--type-body-lg);
  line-height: var(--leading-relaxed);
  font-weight: var(--weight-sans-light);
  color: var(--color-ink-60);
  max-width: var(--maxw-prose);
}

/* Mono metadata / labels / coordinates */
.mono {
  font-family: var(--font-mono);
  font-weight: var(--weight-mono-light);
  letter-spacing: var(--tracking-mono-sm);
  text-transform: uppercase;
}

/* --- Layout helpers ----------------------------------------------------- */
.container {
  width: 100%;
  max-width: var(--maxw-content);
  margin-inline: auto;
  padding-inline: var(--space-gutter);
}

.section { padding-block: var(--space-section); position: relative; z-index: var(--z-content); }

.section--alt     { background-color: var(--color-surface-alt); }
.section--inverse { background-color: var(--color-inverse); color: var(--color-on-inverse); }
.section--inverse .lead { color: var(--color-paper-70); }

.stack-sm > * + * { margin-top: var(--space-sm); }
.stack    > * + * { margin-top: var(--space-md); }
.stack-lg > * + * { margin-top: var(--space-lg); }

.text-center { text-align: center; }
.measure-narrow { max-width: var(--maxw-narrow); margin-inline: auto; }

.visually-hidden {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}

/* --- Foco visível (WCAG 2.1 AA) ---------------------------------------- */
:focus-visible {
  outline: 2px solid var(--color-rust);
  outline-offset: 3px;
}
.section--inverse :focus-visible { outline-color: var(--color-paper); }

/* Skip link */
.skip-link {
  position: absolute; left: var(--space-md); top: -100px; z-index: var(--z-overlay);
  background: var(--color-ink); color: var(--color-paper);
  padding: var(--space-sm) var(--space-md); font-family: var(--font-mono);
  font-size: var(--type-label); letter-spacing: var(--tracking-mono-sm); text-transform: uppercase;
  transition: top var(--dur-fast) var(--ease-out);
}
.skip-link:focus { top: var(--space-md); }

/* ==========================================================================
   Animação — reveal on scroll, parallax, hero sequence
   ========================================================================== */
/* Estado inicial: opacidade controlada via JS (GSAP ou fallback).
   Sem transition aqui de propósito — GSAP anima via inline style a cada
   frame, e uma transition CSS na mesma propriedade geraria um "arrasto"
   (cada novo valor do tween reiniciaria a transition). */
[data-reveal], [data-hero-seq] { opacity: 0; }

[data-parallax] { will-change: transform; }

/* Fallback (GSAP indisponível) — only then a transição CSS entra em cena */
html.no-gsap [data-reveal] {
  transform: translateY(32px);
  transition: opacity 0.7s var(--ease-out), transform 0.7s var(--ease-out);
}
html.no-gsap [data-reveal].is-visible {
  opacity: 1;
  transform: translateY(0);
}
html.no-gsap [data-hero-seq] {
  transform: translateY(20px);
  transition: opacity var(--dur-entrance) var(--ease-out), transform var(--dur-entrance) var(--ease-out);
}
html.no-gsap [data-hero-seq].is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  [data-reveal], [data-parallax], [data-hero-seq] {
    transition: none;
    transform: none;
    opacity: 1;
  }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
}