.focus-toggle {
  position: fixed;
  left: max(16px, env(safe-area-inset-left));
  bottom: max(16px, env(safe-area-inset-bottom));
  z-index: 100020;
  min-height: 44px;
  padding: 10px 16px;
  border: 2px solid #225777;
  border-radius: 12px;
  background: #fffdf7;
  color: #225777;
  box-shadow: 0 3px 0 #adc7d5;
  font: 700 15px/1.3 "PingFang TC", "Noto Sans TC", system-ui, sans-serif;
  cursor: pointer;
  touch-action: manipulation;
}

.focus-toggle:hover { background: #e4f2ff; }
.focus-toggle:focus-visible { outline: 3px solid #e69a16; outline-offset: 4px; }
.lesson-focus .focus-toggle { background: #225777; color: white; }
.focus-font-controls { position: fixed; left: 156px; bottom: max(16px, env(safe-area-inset-bottom)); z-index: 100020; display: flex; gap: 4px; padding: 3px; border: 1px solid #9eafa6; border-radius: 12px; background: #fffdf7; }
.focus-font-controls[hidden] { display: none !important; }
.focus-font-controls button { min-width: 44px; min-height: 44px; padding: 6px 10px; border: 0; border-radius: 8px; background: #e4f2ff; color: #225777; font: 700 16px/1.3 "PingFang TC", system-ui, sans-serif; cursor: pointer; touch-action: manipulation; }
.focus-font-controls button:focus-visible { outline: 3px solid #e69a16; outline-offset: 2px; }
.focus-font-controls button:disabled { opacity: .4; cursor: default; }
.focus-fallback { position: fixed; inset: 0; overflow: auto; }
.focus-fallback body { min-height: 100dvh; }

body.lesson-focus > :is(.app-header, .classroom-header, .manual-nav, .screen-toolbar, footer) { display: none !important; }
.lesson-focus .reader-toolbar { display: none !important; }
.lesson-focus.social-garden .sidebar,
.lesson-focus.social-garden .storybook-welcome-hero { display: none !important; }
.lesson-focus.social-garden .app-layout { display: block; height: auto; min-height: 100dvh; }
.lesson-focus.social-garden .main-content { max-width: 1400px; margin: auto; padding: 24px 24px 84px; }
body.lesson-focus.social-classroom { height: 100dvh; min-height: 0; overflow: hidden; }
body.lesson-focus.social-classroom .slide-viewport { flex: 1; min-height: 0; height: 100dvh !important; max-height: none !important; padding: 12px 64px 68px; }
body.lesson-focus.social-classroom .slide-canvas { width: 100%; max-width: none; height: 100%; max-height: none !important; }
.lesson-focus.social-classroom .step-dot { font-size: 13.6px; }
.lesson-focus.social-classroom .step-number { font-size: 12.8px; }
.lesson-focus.social-classroom .step-label small { font-size: 10px; }
.lesson-focus .sheet-wrapper { padding: 20px 16px 84px; }
.lesson-focus .manual-container { margin-top: 16px; padding-bottom: 84px; }
.lesson-focus .portal-main { padding-bottom: 84px; }
body:has(#stage) .focus-toggle { left: 50%; transform: translateX(-50%); }
body:has(#stage) .focus-font-controls { left: 50%; bottom: 72px; transform: translateX(-50%); }

@media (max-width: 700px) {
  .focus-toggle { padding: 10px 12px; font-size: 14px; }
  .focus-font-controls { left: 16px; bottom: 72px; }
  body.lesson-focus.social-classroom .slide-viewport { padding: 8px 8px 132px; }
  .lesson-focus.social-garden .main-content { padding: 16px 12px 144px; }
  .lesson-focus .sheet-wrapper, .lesson-focus .manual-container, .lesson-focus .portal-main { padding-bottom: 144px; }
}

@media print {
  .focus-toggle, .focus-font-controls { display: none !important; }
}