Update Essence quite a bit.

scss/bootstrap/_variables.scss

@@ -0,0 +1,81 @@
+// Color system (recopied from Bootstrap)
+$white:    #fff !default;
+$gray-500: #adb5bd !default;
+$black:    #000 !default;
+
+$blue:    #0d6efd !default; // From Bootstrap
+$indigo:  #6610f2 !default; // From Bootstrap
+$purple:  hsl(265, 60%, 50%) !default; // Chosen
+$pink:    #d63384 !default; // From Bootstrap
+$red:     hsl(0, 100%, 43%) !default; // Chosen
+$orange:  hsl(30, 100%, 50%) !default; // Chosen, the Gold color from God
+$green:   hsl(134, 87%, 30%) !default; // Chosen
+$teal:    #20c997 !default; // From Bootstrap
+$cyan:    #0dcaf0 !default; // From Bootstrap
+
+$primary: $purple !default;
+$info:    $blue !default;
+$warning: $orange !default;
+
+// Options
+$enable-shadows: true !default;
+
+// Links
+$link-hover-decoration: none !default;
+
+// Components
+$focus-ring-width: .175rem !default;
+$focus-ring-opacity: .175 !default;
+
+// Typography
+$font-family-sans-serif: "Roboto", system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", "Noto Sans", "Liberation Sans", Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji" !default;
+
+$font-size-base: 0.9rem !default;
+
+$line-height-base: 1.6 !default;
+
+$h1-font-size: $font-size-base * 1.6 !default;
+$h2-font-size: $font-size-base * 1.4 !default;
+$h3-font-size: $font-size-base * 1.3 !default;
+$h4-font-size: $font-size-base * 1.2 !default;
+$h5-font-size: $font-size-base * 1.1 !default;
+$h6-font-size: $font-size-base !default;
+
+$headings-font-weight: bold !default; // Make headings bold
+
+// Tables
+$table-hover-bg-factor: .03 !default;
+
+// Buttons + Forms
+
+// Buttons
+$btn-box-shadow: null;
+$enable-gradients: true;
+$btn-transition: none;
+
+// Forms
+$input-bg: $white;
+$input-color: $black;
+$input-border-color: $gray-500;
+$input-transition: none;
+
+// Navs
+$nav-link-transition: none;
+
+// Navbar
+$navbar-dark-color: rgba($white, .8) !default;
+$navbar-dark-hover-color: $white !default;
+
+// Dropdown
+$dropdown-link-hover-bg: hsl(200, 36%, 95%);
+
+// Cards
+$card-border-width: 0;
+$card-box-shadow: 0 .125rem .25rem rgba($black, .075);
+
+// Breadcrumb
+$breadcrumb-divider: quote(">");
+
+// Code
+$code-font-size: 100% !default;
+$code-color: $purple !default;