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

html {
  -webkit-text-size-adjust: 100%;
  background: var(--papel);
}

body {
  margin: 0;
  font-family: var(--fonte);
  color: var(--tinta);
  background: var(--papel);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}
@supports (overflow: clip) { body { overflow-x: clip; } }

/* com a camada aberta a pagina de tras nao rola */
html.camada-aberta, html.camada-aberta body { overflow: hidden; }

img, svg { display: block; max-width: 100%; }
a { color: inherit; }
button {
  font: inherit;
  color: inherit;
  background: none;
  border: 0;
  padding: 0;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}

/* A mancha cresce com transform, e transform aumenta a area rolavel. O main
   corta esse excesso, sem virar container de rolagem (clip, nao hidden). */
main { display: block; overflow: hidden; }
@supports (overflow: clip) { main { overflow: clip; } }
main:focus { outline: none; }

:focus-visible {
  outline: 2px solid var(--azul);
  outline-offset: 4px;
}

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

/* biblioteca de formas: a mancha oficial vive aqui uma vez e e usada por <use> */
.u-formas { position: absolute; width: 0; height: 0; overflow: hidden; }

.pular {
  position: absolute;
  z-index: 300;
  top: calc(env(safe-area-inset-top, 0px) + 10px);
  left: var(--margem);
  padding: 12px 16px;
  background: var(--azul);
  color: var(--papel);
  font-size: 14px;
  font-weight: 700;
  text-decoration: none;
  transform: translateY(-180%);
}
.pular:focus { transform: none; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-delay: 0ms !important;
    transition-duration: .001ms !important;
    transition-delay: 0ms !important;
  }
}