.ern-formulario-caja {
  --ern-tinta: #0f1f3d;
  --ern-acento: #d8452f;
  --ern-acento-suave: #fbeae7;
  --ern-borde: #dcdde0;
  --ern-texto-muted: #6b7280;
  --ern-aviso-fondo: #fff4e5;
  --ern-aviso-borde: #f0b95e;
  --ern-aviso-texto: #7a4a06;

  max-width: 640px;
  margin: 0 auto;
  background: #fff;
  border-radius: 16px;
  padding: 28px 22px;
  box-shadow: 0 2px 16px rgba(15, 31, 61, 0.08);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  box-sizing: border-box;
}

.ern-formulario-caja * {
  box-sizing: border-box;
}

.ern-titulo {
  color: var(--ern-tinta);
  font-size: 22px;
  font-weight: 700;
  margin: 0 0 18px 0;
  text-align: center;
}

.ern-aviso-plazo {
  background: var(--ern-aviso-fondo);
  border: 1.5px solid var(--ern-aviso-borde);
  color: var(--ern-aviso-texto);
  border-radius: 12px;
  padding: 14px 16px;
  font-size: 14px;
  line-height: 1.5;
  margin-bottom: 20px;
}

.ern-aviso-plazo-hoy {
  margin: 8px 0 0 0;
  font-size: 13.5px;
}

.ern-alerta {
  border-radius: 10px;
  padding: 12px 16px;
  font-size: 14px;
  margin-bottom: 18px;
}

.ern-alerta-error {
  background: #fdecea;
  color: #a03a2e;
  border: 1px solid #f3c6c0;
}

.ern-fila {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin-bottom: 16px;
}

@media (min-width: 560px) {
  .ern-fila {
    grid-template-columns: 1fr 1fr;
  }
}

.ern-campo {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 16px;
}

.ern-fila .ern-campo {
  margin-bottom: 0;
}

.ern-formulario-caja label {
  font-size: 14px;
  font-weight: 600;
  color: var(--ern-tinta);
}

.ern-formulario-caja input[type="text"],
.ern-formulario-caja input[type="tel"],
.ern-formulario-caja input[type="email"],
.ern-formulario-caja input[type="file"],
.ern-formulario-caja select,
.ern-formulario-caja textarea {
  width: 100%;
  min-height: 46px;
  padding: 10px 14px;
  border: 1.5px solid var(--ern-borde);
  border-radius: 10px;
  font-size: 16px;
  font-family: inherit;
  color: #1f2430;
  background: #fff;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.ern-formulario-caja textarea {
  min-height: 80px;
  resize: vertical;
}

.ern-formulario-caja input:focus,
.ern-formulario-caja textarea:focus {
  outline: none;
  border-color: var(--ern-acento);
  box-shadow: 0 0 0 3px var(--ern-acento-suave);
}

.ern-checkbox {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 13px;
  font-weight: 400;
  color: var(--ern-texto-muted);
  margin: 4px 0 18px 0;
  cursor: pointer;
}

.ern-checkbox input[type="checkbox"] {
  margin-top: 3px;
  width: 18px;
  height: 18px;
  accent-color: var(--ern-acento);
  flex-shrink: 0;
}

.ern-boton {
  width: 100%;
  min-height: 50px;
  background: var(--ern-acento);
  color: #fff;
  border: none;
  border-radius: 12px;
  font-size: 16px;
  font-weight: 700;
  cursor: pointer;
  transition: background 0.15s ease, transform 0.05s ease;
}

.ern-boton:hover {
  background: #c13a26;
}

.ern-boton:active {
  transform: scale(0.99);
}

.ern-agradecimiento {
  text-align: center;
}

.ern-agradecimiento p {
  color: var(--ern-texto-muted);
  font-size: 15px;
  line-height: 1.6;
  margin-bottom: 18px;
}

.ern-agradecimiento .ern-aviso-plazo {
  text-align: left;
}

.ern-honeypot {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  opacity: 0;
  pointer-events: none;
}