* { box-sizing: border-box; }
body {
  font-family: system-ui, -apple-system, sans-serif;
  background: #f5f5f5;
  margin: 0;
  padding: 24px 16px;
  color: #1a1a1a;
}
.container {
  max-width: 480px;
  margin: 0 auto;
  background: #fff;
  padding: 24px;
  border-radius: 8px;
  box-shadow: 0 1px 4px rgba(0,0,0,0.1);
}
h1 { font-size: 1.5rem; margin-bottom: 4px; }
.subtitulo { color: #555; margin-top: 0; margin-bottom: 24px; }
form { display: flex; flex-direction: column; gap: 4px; }
label { font-weight: 600; margin-top: 12px; font-size: 0.9rem; }
input, select, textarea {
  padding: 10px;
  border: 1px solid #ccc;
  border-radius: 4px;
  font-size: 1rem;
  width: 100%;
}
textarea { resize: vertical; min-height: 60px; }
.checkbox {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  font-weight: normal;
  font-size: 0.85rem;
  margin-top: 16px;
}
.checkbox input { width: auto; }
.erro-campo { color: #c0392b; font-size: 0.8rem; min-height: 1em; }
button {
  margin-top: 20px;
  padding: 12px;
  background: #1a1a2e;
  color: #fff;
  border: none;
  border-radius: 4px;
  font-size: 1rem;
  cursor: pointer;
}
button:disabled { opacity: 0.6; cursor: not-allowed; }
.mensagem { min-height: 1.2em; font-size: 0.9rem; margin-top: 12px; }
.mensagem.erro { color: #c0392b; }
.mensagem.sucesso { color: #27ae60; }
fieldset {
  border: 1px solid #ddd;
  border-radius: 4px;
  padding: 12px;
  margin-top: 16px;
}
fieldset legend {
  font-weight: 600;
  font-size: 0.9rem;
  padding: 0 4px;
}
fieldset label {
  display: block;
  font-weight: normal;
  margin-top: 8px;
  font-size: 0.9rem;
}
#preco-calculado {
  font-weight: 600;
  margin-top: 8px;
  color: #1a1a2e;
}
#area-pagamento {
  margin-top: 16px;
  text-align: center;
}
#area-pagamento img {
  max-width: 240px;
  margin-top: 8px;
}