/* =========================================================
   BASE — reset suave + tipografia raiz
   ========================================================= */

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

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

body {
  margin: 0;
  font-family: var(--cn-sans);
  font-size: var(--fs-body);
  line-height: 1.6;
  color: var(--cn-preto);
  background: var(--cn-bege);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--cn-dur) var(--cn-ease);
}

button {
  font: inherit;
  cursor: pointer;
  border: 0;
  background: none;
  color: inherit;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--cn-serif);
  font-weight: 500;
  line-height: 1.15;
  letter-spacing: -0.01em;
  margin: 0;
}

p { margin: 0 0 1em; }

/* Container util */
.container {
  width: 100%;
  max-width: var(--cn-container);
  margin-inline: auto;
  padding-inline: var(--sp-5);
}
.container-narrow {
  width: 100%;
  max-width: var(--cn-container-narrow);
  margin-inline: auto;
  padding-inline: var(--sp-5);
}

/* Acessibilidade — foco visível */
:focus-visible {
  outline: 2px solid var(--cn-ciano);
  outline-offset: 3px;
  border-radius: 2px;
}

/* Skip link */
.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  padding: var(--sp-3) var(--sp-4);
  background: var(--cn-preto);
  color: var(--cn-bege);
  z-index: 999;
}
.skip-link:focus { left: var(--sp-3); }

/* Modo dark — escopo para seções que pedem fundo escuro */
.surface-dark {
  background: var(--cn-preto);
  color: var(--cn-bege);
}
.surface-light {
  background: var(--cn-bege);
  color: var(--cn-preto);
}
.surface-white { background: var(--cn-branco); color: var(--cn-preto); }