.btn-close {
  box-sizing: content-box;
  width: 1em;
  height: 1em;
  padding: 0.25em 0.25em;
  color: currentColor;
  background: transparent url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='currentColor'%3e%3cpath d='M.293.293a1 1 0 011.414 0L8 6.586 14.293.293a1 1 0 111.414 1.414L9.414 8l6.293 6.293a1 1 0 01-1.414 1.414L8 9.414l-6.293 6.293a1 1 0 01-1.414-1.414L6.586 8 .293 1.707a1 1 0 010-1.414z'/%3e%3c/svg%3e") center/1em auto no-repeat;
  border: 0;
  border-radius: 0.375rem;
  opacity: 0.5;
}
.btn-close:hover {
  color: currentColor;
  text-decoration: none;
  opacity: 0.75;
}
.btn-close:focus {
  outline: 0;
  box-shadow: 0 0 0 3px rgba(57, 68, 117, 0.25);
  opacity: 1;
}
.btn-close:disabled, .btn-close.disabled {
  pointer-events: none;
  -webkit-user-select: none;
     -moz-user-select: none;
          user-select: none;
  opacity: 0.25;
}

.btn-close-white {
  filter: invert(1) grayscale(100%) brightness(200%);
}