* {
  box-sizing: border-box;
}

html {
  background: transparent;
}

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: 'Segoe UI', Arial, sans-serif;
  background: transparent;
}

.contenedor {
  background: transparent;
  padding: 40px;
  border-radius: 12px;
  width: 100%;
  max-width: 640px;
}

h1 {
  margin: 0 0 8px;
  color: #ffffff;
  font-size: 24px;
  text-shadow: 0 1px 3px rgba(0, 0, 0, 0.35);
}

.subtitulo {
  margin: 0 0 24px;
  color: rgba(255, 255, 255, 0.9);
  font-size: 14px;
  text-shadow: 0 1px 3px rgba(0, 0, 0, 0.35);
}

.formulario {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

label {
  font-size: 13px;
  font-weight: 600;
  color: #ffffff;
  text-shadow: 0 1px 3px rgba(0, 0, 0, 0.35);
  margin-top: 12px;
}

input {
  padding: 10px 12px;
  border: 1px solid #ccc;
  border-radius: 6px;
  font-size: 14px;
}

input:focus {
  outline: none;
  border-color: #0b5394;
}

button {
  margin-top: 24px;
  padding: 12px;
  border: none;
  border-radius: 6px;
  background-color: #f2994a;
  color: #1a1a1a;
  font-size: 15px;
  font-weight: 700;
  cursor: pointer;
  transition: background-color 0.2s ease-in-out;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

button:hover {
  background-color: #e07b1f;
}

button:disabled {
  background-color: #f5c896;
  cursor: not-allowed;
}

.spinner {
  width: 16px;
  height: 16px;
  border: 2px solid rgba(0, 0, 0, 0.25);
  border-top-color: #1a1a1a;
  border-radius: 50%;
  animation: girar 0.6s linear infinite;
}

@keyframes girar {
  to {
    transform: rotate(360deg);
  }
}

.errores {
  background: #fdecea;
  border: 1px solid #f5c6cb;
  color: #a94442;
  padding: 12px 16px;
  border-radius: 6px;
  margin-bottom: 16px;
  font-size: 13px;
}

.volver {
  display: inline-block;
  margin-top: 16px;
  color: #ffffff;
  text-decoration: underline;
  font-weight: 600;
  text-shadow: 0 1px 3px rgba(0, 0, 0, 0.35);
}

.volver:hover {
  color: #f2994a;
}

.btn-whatsapp {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin-top: 24px;
  padding: 12px;
  border-radius: 6px;
  background-color: #25d366;
  color: #ffffff;
  text-decoration: none;
  font-weight: 600;
  font-size: 15px;
  transition: background-color 0.2s ease-in-out;
}

.btn-whatsapp:hover {
  background-color: #1da851;
}