@media (max-width: 980px) {
  .app-shell { grid-template-columns: 82px minmax(0, 1fr); }.sidebar { padding-inline: 12px; }.brand { justify-content: center; padding-inline: 0; }.brand > span:last-child, .nav-item > span:last-child, .user-card > div:last-child { display: none; }.nav-item { justify-content: center; padding: 13px; }.nav-icon { width: auto; }.user-card { justify-content: center; padding: 8px; }
  .dashboard-grid, .path-layout, .lesson-shell, .flash-layout { grid-template-columns: 1fr; }.path-summary, .objectives { position: static; }.path-summary { grid-row: 1; }.path-summary p, .path-summary h3 { display: none; }.path-summary .goal-ring { margin-bottom: 0; }.objectives { grid-row: 1; }.flash-layout .filter-card { grid-row: 1; }
}

@media (max-width: 720px) {
  .login-page { grid-template-columns: 1fr; }.login-visual { display: none; }.login-panel { min-height: 100vh; padding: 28px 20px; }.login-brand { padding-bottom: 32px; }.login-box h1 { font-size: 32px; }
  .app-shell { display: block; }.sidebar, .topbar { display: none; }.mobile-head { height: 64px; padding: 0 17px; display: flex; justify-content: space-between; align-items: center; position: sticky; top: 0; z-index: 25; background: var(--surface); border-bottom: 1px solid var(--line); }.mobile-head .brand { padding: 0; font-size: 17px; }.mobile-head .brand-mark { width: 33px; height: 33px; }.mobile-stats { display: flex; gap: 13px; font-size: 12px; font-weight: 850; }
  .mobile-nav { position: fixed; left: 0; right: 0; bottom: 0; z-index: 35; min-height: 70px; display: grid; grid-template-columns: repeat(5, 1fr); gap: 2px; padding: 8px 8px max(8px, env(safe-area-inset-bottom)); background: var(--surface); border-top: 1px solid var(--line); }.mobile-nav .nav-item { padding: 7px; border-radius: 12px; font-size: 21px; }.mobile-nav .nav-item > span:last-child { display: none; }
  .page, .page-narrow { width: min(100% - 30px, 780px); padding-top: 22px; padding-bottom: 100px; }.hero-card { min-height: 325px; }.hero-card::before { font-size: 100px; }.metrics { grid-template-columns: 1fr; }.metric { display: grid; grid-template-columns: 45px 1fr; column-gap: 10px; align-items: center; }.metric-icon { grid-row: span 2; margin: 0; }.metric strong { font-size: 20px; }
  .path-summary { display: none; }.lesson-list { padding-inline: 15px; }.lesson-row { grid-template-columns: 48px 1fr; }.lesson-action { grid-column: 2; justify-self: start; }.chapter-head { padding: 18px 16px; }.chapter-head h2 { font-size: 18px; }
  .objectives { display: none; }.lesson-cta { align-items: stretch; flex-direction: column; }.lesson-cta .btn { width: 100%; }.content-section, .practice-card { padding: 21px 18px; }.code-block { margin-inline: -4px; padding: 16px; font-size: 12px; }.practice-head { display: block; }.practice-head .tag { margin-top: 10px; }.practice-editor { min-height: 280px; font-size: 12px; }.practice-actions { display: grid; }.practice-actions .btn { width: 100%; }
  .result-grid { grid-template-columns: 1fr; }.flash-face { padding: 34px 22px; }.flashcard { min-height: 430px; }.flash-actions { grid-template-columns: 1fr; }.form-grid { grid-template-columns: 1fr; }.form-grid .wide { grid-column: auto; }.setting-row { align-items: flex-start; }.danger-zone .btn { width: 100%; }.admin-user { grid-template-columns: 1fr; }.admin-actions { flex-wrap: wrap; }.toast { right: 15px; left: 15px; bottom: 87px; text-align: center; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; animation: none !important; transition: none !important; }
}