/* ============================================================
   Mobile breakpoint + mobile sidebar toggle
   ============================================================ */

.mobile-toggle {
  display: none;
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 100;
  background: var(--bg-2);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 8px 12px;
  border-radius: 4px;
  cursor: pointer;
  font-family: var(--mono);
}

@media (max-width: 900px) {
  body { grid-template-columns: 1fr; }

  .sidebar {
    position: fixed;
    left: -300px;
    width: 280px;
    transition: left 0.3s;
  }

  .sidebar.open { left: 0; }
  .mobile-toggle { display: block; }
  main { padding: 60px 20px 80px; }
  h1 { font-size: 32px; }

  .stats         { grid-template-columns: repeat(2, 1fr); }
  .roadmap       { grid-template-columns: 1fr; }
  .calc-result   { grid-template-columns: 1fr; }
  .dora-stage    { grid-template-columns: 1fr; }
  .quiz-launcher { grid-template-columns: 1fr; }
  .key-list      { grid-template-columns: 1fr; }
}