/* Cabeçalho */
header {
  background-color: var(--color-primary);
  color: var(--color-surface);
  text-align: center;
  padding: var(--space-2);
}

nav ul {
  display: flex;
  justify-content: center;
  list-style: none;
  gap: var(--space-3);
  margin: 0;
  padding: 0;
}

nav a {
  color: var(--color-surface);
  font-weight: 500;
}

nav a:hover {
  text-decoration: underline;
}

/* Estrutura geral */
main {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
  padding: var(--space-4);
}

section {
  background: var(--color-surface);
  border-radius: 8px;
  padding: var(--space-3);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}
/* ==== BOTÃO DE ALTO CONTRASTE ==== */
#contrast-toggle {
  background-color: #fff;
  color: #6a1b47;
  border: 2px solid #6a1b47;
  border-radius: 8px;
  padding: 6px 12px;
  margin-left: 20px;
  cursor: pointer;
  font-weight: bold;
  transition: background 0.3s, color 0.3s;
}

#contrast-toggle:hover,
#contrast-toggle:focus {
  background-color: #6a1b47;
  color: #fff;
  outline: none;
}
body.high-contrast {
  background-color: #000;
  color: #fff;
}

body.high-contrast a {
  color: #ff0;
}

body.high-contrast header,
body.high-contrast footer {
  background-color: #222;
}