tabler/core/scss/ui/_toasts.scss

.toast {
  border: $alert-border-width var(--#{$prefix}border-style) $alert-border-color;
  box-shadow: $alert-shadow;

  .toast-header {
    user-select: none;
  }

  button[data-bs-dismiss="toast"] {
    outline: none;
  }
}

@each $state, $value in $theme-colors {
  .toast-#{$state} {
    --#{$prefix}toast-color: #{$value};
  }
}