/* Keep the question ahead of shortcuts, statistics, and authoring tools. */
.shell{grid-template-areas:"sidebar header" "sidebar main" "sidebar footer";grid-template-rows:auto 1fr auto}
.sidebar{grid-area:sidebar}
.work{grid-area:main;align-self:start;padding-top:18px;min-width:0}
.app-header{grid-area:header;display:flex;align-items:center;justify-content:flex-start;width:100%;max-width:1480px;margin:0 auto;padding:20px 42px 16px;gap:14px;min-width:0}
.app-header .home-button{display:grid;place-items:center;flex:0 0 42px;width:42px;height:42px;min-height:42px;padding:0;margin:0;border-radius:11px}
.app-header .home-button svg{width:21px;height:21px}
.app-header .section-nav{flex-wrap:nowrap;gap:5px;min-width:0}
.app-header .section-nav a{white-space:nowrap}
.app-footer{grid-area:footer;display:flex;justify-content:flex-end;align-items:center;max-width:1480px;width:100%;margin:0 auto;padding:12px 42px 22px;color:var(--muted)}
.app-footer .pill{background:transparent;border:0;font-size:10px}
.study-tools{padding:16px 0 0}
.study-tools #manage-btn{width:100%;font-size:12px;min-height:40px}
#study-stats{margin-top:24px;margin-bottom:0}
#empty-state.subject-welcome{display:none}
.study-retry-button{display:none}
.question-card{scroll-margin-top:80px}
@media(max-width:1200px) and (min-width:741px){.app-header{padding-left:27px;padding-right:27px}.app-footer{padding-left:27px;padding-right:27px}}
@media(max-width:740px){
  .shell{display:grid;grid-template-columns:minmax(0,1fr);grid-template-rows:auto 1fr auto auto;grid-template-areas:"header" "main" "sidebar" "footer";min-height:100dvh}
  .app-header{position:sticky;top:0;z-index:20;flex-wrap:nowrap;gap:7px;padding:8px 12px;border-bottom:1px solid var(--line);background:rgba(255,255,255,.98);margin:0;max-width:none}
  .app-header .home-button{flex-basis:38px;width:38px;height:40px;min-height:40px;border-radius:9px;background:#fff}
  .app-header .section-nav{flex:1;justify-content:space-between;gap:1px}
  .app-header .section-nav a{justify-content:center;min-height:40px;font-size:12px;padding:8px 9px;border-radius:8px;letter-spacing:-.035em}
  .work{padding:12px 12px 18px;max-width:none;margin:0;min-width:0}
  #study-view{min-width:0}
  .filterbar{gap:9px;margin:0 0 12px;grid-template-columns:repeat(2,minmax(0,1fr))}
  .filterbar[data-subject-selected=false]{grid-template-columns:minmax(0,1fr)}
  .filterbar[data-subject-selected=false] .unit-filter,.filterbar[data-subject-selected=false] .subunit-filter,.filterbar[data-subject-selected=false] .filter-search-row{display:none}
  .filterbar[data-has-subunits=false] .subunit-filter{display:none}
  .filterbar[data-subject-selected=true][data-has-subunits=false] .filter-search-row{grid-column:1/-1;display:flex;gap:9px}
  .filterbar[data-has-subunits=false] .filter-search-label{font-size:10px}
  .filterbar[data-has-subunits=false] .filter-search-row .search-field{flex:1;flex-basis:auto;min-height:36px}
  .filterbar select{min-height:44px;padding-top:8px;padding-bottom:8px;font-size:16px}
  .subject-filter,.unit-filter,.subunit-filter{gap:4px;font-size:10px}
  .filter-search-row .search-field{min-height:38px}
  .search-field input{padding:7px 0;font-size:16px}
  #app-shell input:not([type=radio]):not([type=checkbox]),#app-shell textarea{font-size:16px}
  .filter-count{font-size:10px}
  #study-grid>.explanation{display:none}
  .question-card{padding:17px 15px;overflow:visible;border-radius:14px;scroll-margin-top:68px}
  .question-card .card-top{gap:8px;align-items:flex-start}
  .question-card .chips{gap:4px}
  #q-subject,#q-difficulty,#q-id{display:none}
  .question-card .q-number{margin:13px 0 5px;font-size:10px;letter-spacing:0;line-height:1.6}
  .question-card .q-text{margin:0 0 17px;font-size:17px;line-height:1.65}
  .question-card .option{min-height:48px;padding:11px 10px;font-size:13px;line-height:1.7}
  .question-card .options{gap:8px}
  .question-card .bookmark{min-height:36px}
  #question-card .actions{position:sticky;bottom:0;z-index:5;margin:17px -3px 0;padding:8px 3px max(8px,env(safe-area-inset-bottom));background:rgba(255,255,255,.98);border-top:1px solid #edf0e9;border-radius:0 0 10px 10px;gap:7px}
  #question-card .actions button{min-height:44px}
  .study-retry-button{display:block;border:0;background:none;color:var(--muted);font-size:11px;padding:8px 4px;min-height:36px;margin:4px auto 0;text-decoration:underline;text-underline-offset:3px}
  .question-bottom{margin-top:8px;padding-top:10px;font-size:10px}
  #question-nav{margin-top:14px;max-height:116px}
  #study-stats{gap:7px;margin-top:20px}
  #study-stats .stat{padding:10px 9px}
  #study-stats .stat-value{font-size:21px}
  .footnote{font-size:10px;padding-top:15px;margin-top:18px}
  #study-filters[data-subject-selected=false]~.footnote{display:none}
  .sidebar{position:static;height:auto;max-width:none;padding:18px 12px 10px;margin:0;border-right:0;border-bottom:0;border-top:1px solid var(--line);gap:15px;background:#fafbf8}
  .sidebar>.brand{display:none}
  .sidebar .subject-navigation{gap:7px}
  .sidebar .subject-navigation>.nav-label{margin:0;font-size:10px}
  .sidebar .subject-nav button{min-height:40px;font-size:11px;padding:8px 11px}
  .sidebar-bottom{padding-top:12px}
  .sidebar-bottom .mode-nav button{font-size:11px;min-height:42px}
  .study-tools{padding:11px 0 0}
  .study-tools #manage-btn{min-height:36px;font-size:11px;width:auto;padding:7px 12px}
  .sidebar-bottom .guide-link{display:inline-flex;min-height:36px;margin:4px 0 0;font-size:10px}
  .app-footer{padding:6px 12px max(12px,env(safe-area-inset-bottom));margin:0;background:#fafbf8}
}
@media(max-width:360px){
  .app-header{padding-left:8px;padding-right:8px;gap:4px}
  .app-header .section-nav a{font-size:11px;padding:8px 6px}
  .app-header .home-button{flex-basis:34px;width:34px}
}