html {
  font-size: 14px;
}

@media (min-width: 768px) {
  html {
    font-size: 16px;
  }
}

html {
  position: relative;
  min-height: 100%;
}

body {
  margin-bottom: 60px;
}

.modal-body {
    position: relative;
    flex: 1 1 auto;
    height: 500px;
    padding: 1rem;
    overflow: auto;
}

.loading {
    position: absolute;
    background: #f9f9f9d1;
    width: 100%;
    top: 0;
    left: 0;
    height: 100%;
    display: flex;
    z-index: 9999999999;
    text-align: center;
    flex-wrap: nowrap;
    justify-content: center;
    align-items: center;
}
.loader {
    border: 8px solid #f3f3f3;
    border-top: 8px solid #3498db;
    border-radius: 50%;
    width: 50px;
    height: 50px;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% {
        transform: rotate(0deg);
    }

    100% {
        transform: rotate(360deg);
    }
}