@mixin dark {
  --f1: #ccc;// Font Color Primary (ccc)
  --f2: #ddd;// Font color Headers (ddd)
  --c1: #111;// Background Color Primary (111)
  --c2: #222;// Background Color Secondary (222)
  --c3: #333;// Table Rows, Block quote edge, Borders (333)
  --c4: #888;// Disabled Buttons, Borders, mark background (888)
  --a1: #f90;// link color (f90)
  --a2: #fb0;// link hover/focus color (fb0)
  --a3: #f90;// link h1-h2 hover/focus color (f90)
  --cg: #593;// ins green, success (593)
  --cr: #e33;// del red, errors (e33)
}
@mixin light {
  --f1: #333;// Font Color Primary (444)
  --f2: #222;// Font color Headers (333)
  --c1: #fff;// Background Color Primary (fff)
  --c2: #eee;// Background Color Secondary (eee)
  --c3: #ddd;// Table Rows, Block quote edge, Borders (ddd)
  --c4: #555;// Disabled Buttons, Borders, mark background (677)
  --a1: #c40;// link color (c40)
  --a2: #e60;// link hover/focus color (e60)
  --a3: #f90;// link h1-h2 hover/focus color (f90)
  --cg: #373;// ins green, success (373)
  --cr: #d33;// del red, errors (d33)
}