* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #f9fafb;
  color: #1f2937;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  padding: 16px;
}
.moldura {
  width: 100%;
  max-width: 28rem;
  background: #fff;
  border: 1px solid #e5e7eb;
  border-radius: 12px;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
  padding: 24px;
}
h1 { font-size: 1.125rem; font-weight: 600; margin: 0 0 16px; color: #15803d; }
#mensagem { font-size: 0.875rem; line-height: 1.4; margin: 0 0 16px; }
#mensagem[data-tipo="erro"] { color: #b91c1c; }
#mensagem[data-tipo="sucesso"] { color: #15803d; }
button {
  width: 100%;
  padding: 10px 16px;
  border: 0;
  border-radius: 8px;
  background: #16a34a;
  color: #fff;
  font-size: 0.95rem;
  cursor: pointer;
}
button:hover:not(:disabled) { background: #15803d; }
button:disabled { opacity: 0.5; cursor: default; }