/* ==========================================================================
   BASE — reset, textura de papel e estilos globais
   ========================================================================== */

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0px 0px;
  padding: 0;
}

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

body {
  font-family: var(--font-text);
  font-size: clamp(1rem, 1.2vw, 1.25rem);
  line-height: 1.5;
  color: var(--color-ink);
  background-color: var(--color-paper);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

/* Textura de papel sutil via pseudo-elemento (nunca prejudica a leitura) */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  opacity: 0.4;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.75' numOctaves='2' stitchTiles='stitch'/%3E%3CfeComponentTransfer%3E%3CfeFuncA type='table' tableValues='0 0.04'/%3E%3C/feComponentTransfer%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  mix-blend-mode: multiply;
}

main {
  position: relative;
  z-index: 1;
}

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

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

a {
  color: inherit;
}

ul,
ol {
  list-style: none;
}

::selection {
  background: var(--color-yellow);
  color: var(--color-ink);
}

/* Foco visível para navegação por teclado */
:focus-visible {
  outline: 3px solid var(--color-teal);
  outline-offset: 3px;
  border-radius: 2px;
}

/* Elemento visualmente oculto mas acessível */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}