*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--fonte);
  font-size: 15px;
  line-height: 1.45;
  color: var(--texto);
  background: var(--fundo);
  -webkit-font-smoothing: antialiased;
}
h1, h2, h3, p { margin: 0; }
button, input, select, textarea { font: inherit; color: inherit; }
button { cursor: pointer; }
a { color: inherit; text-decoration: none; }
:focus-visible { outline: 2px solid var(--laranja); outline-offset: 2px; }
.num { font-variant-numeric: tabular-nums; font-weight: 700; }
.so-leitor { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

/* Casca: celular primeiro. No computador, painel branco com menu lateral. */
.casca { min-height: 100vh; min-height: 100dvh; background: var(--area); padding-bottom: calc(var(--altura-barra) + env(safe-area-inset-bottom)); }
.conteudo { padding: 20px 16px 24px; max-width: 760px; margin: 0 auto; }
.conteudo h1 { font-size: 22px; font-weight: 700; letter-spacing: -0.02em; }
.conteudo .sub { color: var(--texto-suave); font-size: 13px; margin-top: 2px; }
.grade { display: grid; gap: 14px; margin-top: 18px; }

@media (min-width: 1024px) {
  body { padding: 20px; }
  .casca {
    display: grid; grid-template-columns: 248px 1fr;
    min-height: calc(100vh - 40px); max-width: 1440px; margin: 0 auto;
    background: var(--painel); border-radius: var(--raio-painel); padding: 14px; gap: 14px;
  }
  .conteudo {
    max-width: none; margin: 0; background: var(--area); border-radius: 22px; padding: 28px 30px;
  }
  .grade.duas { grid-template-columns: 1fr 1fr; }
}