/* ===== ESTILOS DEL FORMULARIO ===== */

.container-form {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: calc(100vh - 200px);
  padding: 20px;
}

.form-card {
  background: white;
  padding: 40px;
  border-radius: 12px;
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.2);
  max-width: 500px;
  width: 100%;
  animation: slideIn 0.3s ease-out;
}

@keyframes slideIn {
  from {
    opacity: 0;
    transform: translateY(-20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.form-card h2 {
  color: #2c3e50;
  margin-top: 0;
  margin-bottom: 30px;
  text-align: center;
  font-size: 28px;
}

.form-group {
  margin-bottom: 20px;
  display: flex;
  flex-direction: column;
}

.form-group label {
  color: #2c3e50;
  font-weight: 600;
  margin-bottom: 8px;
  font-size: 14px;
}

.form-group input[type="text"],
.form-group input[type="tel"],
.form-group input[type="email"] {
  padding: 12px 15px;
  border: 2px solid #e0e0e0;
  border-radius: 6px;
  font-size: 14px;
  transition: 0.3s;
  font-family: inherit;
}

.form-group input[type="text"]:focus,
.form-group input[type="tel"]:focus,
.form-group input[type="email"]:focus {
  outline: none;
  border-color: #3498db;
  box-shadow: 0 0 8px rgba(52, 152, 219, 0.2);
  background: #f8fbff;
}

.checkbox-group {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-top: 12px;
}

.checkbox-label {
  display: flex;
  align-items: center;
  padding: 12px 15px;
  border: 2px solid #e0e0e0;
  border-radius: 6px;
  cursor: pointer;
  transition: 0.3s;
  background: white;
}

.checkbox-label input[type="checkbox"] {
  margin-right: 10px;
  cursor: pointer;
  width: 18px;
  height: 18px;
}

.checkbox-label:hover {
  border-color: #3498db;
  background: #f0f7ff;
}

.checkbox-label input[type="checkbox"]:checked + span {
  color: #3498db;
  font-weight: 600;
}

.checkbox-label input[type="checkbox"]:checked {
  accent-color: #3498db;
}

.checkbox-label span {
  font-size: 14px;
  color: #333;
  transition: 0.2s;
}

.btn-comprar {
  width: 100%;
  padding: 14px;
  background: #3498db;
  color: white;
  border: none;
  border-radius: 6px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  margin-top: 20px;
  transition: 0.3s;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.btn-comprar:hover {
  background: #2980b9;
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(52, 152, 219, 0.3);
}

.btn-comprar:active {
  transform: translateY(0);
}

/* ===== ENCABEZADO MODIFICADO ===== */

.header-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
}

.header-nav h1 {
  margin: 0;
  flex: 1;
}

.btn-volver {
  background: #ff9800;
  color: white;
  padding: 10px 20px;
  text-decoration: none;
  border-radius: 6px;
  font-weight: 600;
  transition: 0.3s;
  display: inline-block;
  white-space: nowrap;
}

.btn-volver:hover {
  background: #f57c00;
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(255, 152, 0, 0.3);
}

/* ===== RESPONSIVE ===== */

@media (max-width: 600px) {
  .form-card {
    padding: 25px;
  }

  .form-card h2 {
    font-size: 22px;
    margin-bottom: 20px;
  }

  .checkbox-group {
    grid-template-columns: 1fr;
  }

  .header-nav {
    flex-direction: column;
    gap: 10px;
    text-align: center;
  }

  header h1 {
    font-size: 20px;
  }

  .btn-volver {
    width: 100%;
    text-align: center;
  }
}

@media (max-width: 900px) {
  .form-card {
    padding: 30px;
  }
}