:root {
  --fundo: #f4f6f8;
  --cartao: #ffffff;
  --texto: #1f2933;
  --suave: #616e7c;
  --borda: #d9e2ec;
  --primaria: #0b6e4f;
  --primaria-texto: #ffffff;
  --erro: #b42318;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: var(--fundo);
  color: var(--texto);
  line-height: 1.5;
}

header.topo {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  padding: 0.75rem 1rem;
  background: var(--primaria);
  color: var(--primaria-texto);
}
header.topo a, header.topo button { color: var(--primaria-texto); }
header.topo .marca { font-weight: 700; text-decoration: none; }
header.topo nav { display: flex; gap: 1rem; align-items: center; flex-wrap: wrap; }

main { max-width: 960px; margin: 1.5rem auto; padding: 0 1rem; }

.cartao {
  background: var(--cartao);
  border: 1px solid var(--borda);
  border-radius: 8px;
  padding: 1.25rem;
  margin-bottom: 1rem;
}
.cartao.estreito { max-width: 380px; margin: 3rem auto; }

.grade { display: grid; gap: 1rem; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); }
.grade .cartao { margin: 0; }
.grade a.cartao { text-decoration: none; color: inherit; font-weight: 600; }
.grade a.cartao:hover { border-color: var(--primaria); }
.em-breve { color: var(--suave); font-weight: 400; font-size: 0.9rem; }

label { display: block; font-weight: 600; margin-top: 0.75rem; }
input[type=text], input[type=password] {
  width: 100%;
  padding: 0.55rem 0.6rem;
  border: 1px solid var(--borda);
  border-radius: 6px;
  font-size: 1rem;
}
button, .botao {
  display: inline-block;
  margin-top: 1rem;
  padding: 0.55rem 1rem;
  border: 0;
  border-radius: 6px;
  background: var(--primaria);
  color: var(--primaria-texto);
  font-size: 1rem;
  cursor: pointer;
  text-decoration: none;
}
button.link { background: none; padding: 0; margin: 0; text-decoration: underline; font-size: inherit; }

.erro, .errorlist { color: var(--erro); }
.errorlist { padding-left: 1rem; margin: 0.25rem 0; }
.suave { color: var(--suave); }
.helptext { display: block; color: var(--suave); font-size: 0.85rem; }