/* =====================================
   Tahouri Edu Platform
   Shared Platform Shell

   IMPORTANT:
   - This file contains only shell-level rules shared by platform screens.
   - Header styles live in header.css.
   - Learning page styles live in grades.css / subjects.css / chapters.css / activitySelection.css.
   - Engine styles must live with their respective engines.
   ===================================== */

/* Header owns its visual system. These rules only suppress legacy screen-level back buttons. */
#app > .screen:has(> .tahouri-app-header) #backHomeBtn,
#app > .screen:has(> .tahouri-app-header) #backGradesBtn,
#app > .screen:has(> .tahouri-app-header) #backSubjectsBtn,
#app > .screen:has(> .tahouri-app-header) #backChaptersBtn {
    display: none;
}