{\n  .placeholder {\n    animation: placeholder-glow 2s ease-in-out infinite;\n  }\n}\n\n@keyframes placeholder-glow {\n  50% {\n    opacity: $placeholder-opacity-min;\n  }\n}\n\n.placeholder-wave {\n  mask-image: linear-gradient(130deg, $black 55%, rgba(0, 0, 0, (1 - $placeholder-opacity-min)) 75%, $black 95%);\n  mask-size: 200% 100%;\n  animation: placeholder-wave 2s linear infinite;\n}\n\n@keyframes placeholder-wave {\n  100% {\n    mask-position: -200% 0%;\n  }\n}\n","// All-caps `RGBA()` function...

outline: 0;\n  box-shadow: 0 0 0 0.2rem rgba(0, 123, 255, 0.25);\n}\n\n.form-control::-webkit-input-placeholder {\n  color: #6c757d;\n  opacity: 1;\n}\n\n.form-control::-moz-placeholder {\n  color: #6c757d;\n  opacity: 1;\n}\n\n.form-control:-ms-input-placeholder {\n  color: #6c757d;\n  opacity: 1;\n}\n\n.form-control::-ms-input-placeholder {\n  color: #6c757d;\n  opacity: 1;\n}\n\n.form-control::placeholder {\n  color: #6c757d;\n  opacity: 1;\n}\n\n.form-control:disabled, .form-control[readonly] {\n ...