fluid layouts started

Natours/starter/sass/abstracts/_variables.scss

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+//Colors
+$color-primary: #7ed56f;
+$color-primary-light: #55c57a;
+$color-primary-dark: #28b485;
+
+$color-grey-light-1: #f7f7f7;
+
+$color-gray-dark: #777;
+$color-white: #fff;
+$color-black: #000;
+
+//Grid Spacing
+$grid-width: 114rem;
+$gutter-vertical: 8rem;
+$gutter-horizontal: 6rem;