/* ============================================================
   b2-exercise-theme.css – B2 Exercise Pages (Lesen, Hören, Schreiben, Sprachbausteine)
   Blue theme for B2 exercise/practice pages.
   Landing pages (b2-start.html, b2-index.html) use b2-theme.css (purple).
   ============================================================ */
:root {
  --color-header-bg:      #2d7dd2;
  --color-primary:        #2d7dd2;
  --color-primary-dark:   #1a6bbf;
  --color-primary-light:  #7ab8f5;
  --color-primary-bg:     #eff6ff;
  --color-secondary:      #2d7dd2;
  --color-gradient-start: #1a6bbf;
  --color-gradient-end:   #2d7dd2;
}