.main-form {
  max-width: 100%;
  margin: 0 auto;
  padding: 1rem 0;
  font-family: sans-serif;
}

label {
  font-weight: 600;
  display: inline-block;
  margin-bottom: 0.5rem;
  font-size: var(--font-big);
}

.required {
  color: red;
  margin-left: 0.25rem;
}

input,
textarea,
select {
  width: 100%;
  padding: 0.5rem 0.75rem;
  border: 1px solid #ced4da;
  border-radius: 0.5rem;
  font-size: 1rem;
}

textarea {
  resize: vertical;
  min-height: 200px;
}

.row {
  display: flex;
  flex-wrap: wrap;
  margin-left: -0.5rem;
  margin-right: -0.5rem;
}

.col-12,
.col-md-4,
.col-md-6 {
  padding-left: 0.5rem;
  padding-right: 0.5rem;
  margin-bottom: 1rem;
  width: 100%;
}

@media (min-width: 768px) {
  .col-md-4 {
    width: 33.3333%;
  }

  .col-md-6 {
    width: 50%;
  }
}

.mb-2 {
  margin-bottom: 0.5rem;
}

.mb-md-0 {
  margin-bottom: 0;
} 

#form-loading-mask {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background-color: rgba(255, 255, 255, 0.8);
  z-index: 9999;
  display: flex;
  justify-content: center;
  align-items: center;
}
.loading-spinner {
  border: 6px solid #f3f3f3;
  border-top: 6px solid #3498db;
  border-radius: 50%;
  width: 50px;
  height: 50px;
  animation: spin 1s linear infinite;
}
@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}