Change CSS framework from PicoCSS to Bootstrap 5.3

assets/bs/pulse/_bootswatch.scss

@@ -0,0 +1,155 @@
+// Pulse 5.3.8
+// Bootswatch
+
+
+// Variables
+
+// Buttons
+
+.btn {
+  &:focus,
+  &:active,
+  &:active:focus,
+  &.active:focus {
+    outline: none;
+  }
+
+  &-secondary {
+    color: $gray-900;
+    background-color: $white;
+    border-color: #ccc;
+
+    &:hover {
+      color: $gray-900;
+      background-color: $gray-300;
+      border-color: $gray-500;
+    }
+
+    &.disabled {
+      color: tint-color($gray-900, 5%);
+      background-color: $white;
+      border-color: tint-color(#ccc, 5%);
+    }
+  }
+
+  &-warning {
+    color: $white;
+  }
+
+  &-primary:focus {
+    box-shadow: 0 0 5px tint-color($primary, 10%);
+  }
+
+  &-secondary:focus {
+    box-shadow: 0 0 5px $gray-400;
+  }
+
+  &-success:focus {
+    box-shadow: 0 0 5px tint-color($success, 10%);
+  }
+
+  &-info:focus {
+    box-shadow: 0 0 5px tint-color($info, 10%);
+  }
+
+  &-warning:focus {
+    box-shadow: 0 0 5px tint-color($warning, 10%);
+  }
+
+  &-danger:focus {
+    box-shadow: 0 0 5px tint-color($danger, 10%);
+  }
+
+  &.disabled:focus {
+    box-shadow: none;
+  }
+}
+
+// Tables
+
+.table .thead-dark th {
+  background-color: $secondary;
+  border-color: $table-border-color;
+}
+
+.table-primary,
+.table-secondary,
+.table-success,
+.table-warning,
+.table-danger,
+.table-info,
+.table-light {
+  --#{$prefix}table-color: #{$body-color};
+}
+
+// Forms
+
+.form-control:focus {
+  box-shadow: 0 0 5px rgba(100, 65, 164, .4);
+}
+
+// Navs
+
+.nav-tabs {
+  .nav-link,
+  .nav-link.active, {
+    border-width: 0 0 1px;
+  }
+
+  .nav-link:hover,
+  .nav-link.active,
+  .nav-link.active:hover,
+  .nav-link.active:focus {
+    border-bottom: 1px solid $primary;
+  }
+
+  .nav-item + .nav-item {
+    margin-left: 0;
+  }
+}
+
+.breadcrumb {
+  &-item.active {
+    color: $gray-700;
+  }
+}
+
+// Indicators
+
+.badge {
+  &.bg-light {
+    color: $dark;
+  }
+}
+
+// Progress bars
+
+.progress {
+  height: 8px;
+}
+
+// Containers
+
+.list-group {
+  &-item {
+    color: rgba(255, 255, 255, .8);
+
+    &.active,
+    &:hover,
+    &:focus {
+      color: $white;
+    }
+
+    &.active {
+      font-weight: 700;
+
+      &:hover {
+        background-color: $list-group-hover-bg;
+      }
+    }
+
+    &.disabled:hover {
+      color: $list-group-disabled-color;
+    }
+  }
+}

assets/bs/pulse/_variables.scss

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+// Pulse 5.3.8
+// Bootswatch
+
+$theme: "pulse" !default;
+
+//
+// Color system
+//
+
+$white:    #fff !default;
+$gray-100: #fafafa !default;
+$gray-200: #f9f8fc !default;
+$gray-300: #ededed !default;
+$gray-400: #cbc8d0 !default;
+$gray-500: #adb5bd !default;
+$gray-600: #868e96 !default;
+$gray-700: #444 !default;
+$gray-800: #343a40 !default;
+$gray-900: #17141f !default;
+$black:    #000 !default;
+
+$blue:    #007bff !default;
+$indigo:  #6610f2 !default;
+$purple:  #593196 !default;
+$pink:    #e83e8c !default;
+$red:     #fc3939 !default;
+$orange:  #fd7e14 !default;
+$yellow:  #efa31d !default;
+$green:   #13b955 !default;
+$teal:    #20c997 !default;
+$cyan:    #009cdc !default;
+
+$primary:       $purple !default;
+$secondary:     #a991d4 !default;
+$success:       $green !default;
+$info:          $cyan !default;
+$warning:       $yellow !default;
+$danger:        $red !default;
+$light:         $gray-200 !default;
+$dark:          $gray-900 !default;
+
+$min-contrast-ratio:   2.1 !default;
+
+// Options
+
+$enable-rounded: false !default;
+
+// Body
+
+$body-color:                $gray-700 !default;
+
+// Links
+
+$link-hover-color:          $primary !default;
+
+// Tables
+
+$table-color:                 initial !default;
+
+$table-border-color:          rgba(0, 0, 0, .05) !default;
+
+// Forms
+
+$input-focus-border-color:              $primary !default;
+
+// Dropdowns
+
+$dropdown-link-hover-color:         $white !default;
+$dropdown-link-hover-bg:            $primary !default;
+
+// Navs
+
+$nav-tabs-border-color:             $gray-300 !default;
+$nav-tabs-link-hover-border-color:  $primary !default;
+
+// Navbar
+
+$navbar-padding-y:                  1.2rem !default;
+
+// Progress bars
+
+$progress-bg:                       $gray-300 !default;
+$progress-bar-bg:                   $primary !default;
+
+// List group
+
+$list-group-bg:                     $gray-900 !default;
+$list-group-border-color:           transparent !default;
+$list-group-hover-bg:               lighten($list-group-bg, 10%) !default;
+$list-group-active-color:           $white !default;
+$list-group-active-bg:              $list-group-bg !default;
+$list-group-disabled-color:         lighten($list-group-bg, 30%) !default;