.student-missions[hidden] { display:none!important; }
.student-missions { margin:18px 16px; border:1px solid var(--line); border-radius:5px; background:var(--bg); font-size:12px; }
.student-missions summary { cursor:pointer; padding:14px 12px; color:var(--text); }
.student-missions>summary { color:var(--accent); font-size:11px; letter-spacing:.04em; }
#mission-count { display:block; margin-top:8px; color:var(--text); font-size:12px; letter-spacing:0; }
.mission-body { padding:0 10px 10px; }.mission-body p { line-height:1.6; font-size:11px; }.mission-intro,.mission-source { color:var(--muted); }
.console-guide { border-bottom:1px solid var(--line); }.console-guide summary { padding:10px 0; font-size:11px; color:var(--accent); }.console-guide ol { padding-left:20px; line-height:1.8; }
#mission-policy { border-left:2px solid var(--accent); padding-left:8px; }
.mission-task { margin:10px 0; border:1px solid var(--line); border-radius:4px; }.mission-task>summary { padding:10px 8px; }.mission-title { font-weight:bold; font-size:12px; }.mission-status { display:block; color:var(--muted); font-size:10px; margin:6px 0; }.mission-objective { display:block; font-size:11px; line-height:1.5; }
.mission-detail { padding:0 10px 12px; }.mission-hints { padding-left:18px; }.mission-hints li { margin:10px 0; font-size:11px; line-height:1.6; }.mission-hints code { color:var(--uos-orange); overflow-wrap:anywhere; }
.mission-hint-button { width:100%; padding:9px 6px; background:var(--action-bg); color:var(--text); border:1px solid var(--line); font:inherit; font-size:11px; cursor:pointer; }.mission-hint-button:disabled { color:var(--muted); cursor:default; }
.mission-done { border-color:var(--uos-orange); }.mission-done .mission-status { color:var(--uos-orange); }.mission-learning { border-top:1px solid var(--line); padding-top:8px; }#mission-feedback:empty { display:none; }#mission-feedback { color:var(--accent); }
.mission-flash { animation:mission-completed .6s ease-out; }@keyframes mission-completed { from { background:#ff75331c; }to { background:transparent; } }
@media(prefers-reduced-motion:reduce) { .mission-flash { animation:none; } }
.student-missions summary:focus-visible,.mission-hint-button:focus-visible { outline:2px solid var(--accent); outline-offset:2px; }

/* Keep the activity inside the sidebar rather than stretching the arena panel. */
.game-layout:has(.student-missions:not([hidden])) { align-items:start; }
.leader-panel:has(.student-missions:not([hidden]))>.mission { display:none; }
.student-missions .mission-body { max-height:min(540px,calc(100vh - 220px)); overflow-y:auto; scrollbar-gutter:stable; }

/* Edge's docked Console reduces the page width; retain space for readable hints. */
@media(max-width:1200px) {
  .shell { padding:0 16px; }
  .masthead { height:auto; min-height:60px; gap:16px; }.edition,.room-label { display:none; }
  .intro { margin:16px 0 14px; }.intro h1 { font-size:25px; }.intro .eyebrow { margin-bottom:6px; }.subtitle { margin-top:6px; font-size:12px; }
  .dashboard { margin-bottom:14px; }.dashboard>div { padding:10px 14px; }.dashboard strong { font-size:25px; }.stat-label { margin-bottom:5px; }
  .game-layout { grid-template-columns:minmax(0,1fr) 310px; gap:14px; }.panel-heading { height:38px; padding:0 12px; }
  .canvas-wrap:has(#join-overlay.hidden) { min-height:0; height:auto; aspect-ratio:1200/760; }
  .leader-panel:has(.student-missions:not([hidden])) { display:flex; flex-direction:column; }
  .student-missions { margin:12px; order:-1; }.student-missions .mission-body { max-height:none; overflow:visible; }
  .student-missions summary { padding:10px; }.mission-task>summary { padding:8px; }
  .arena-footer { padding:10px; }.control-label { display:none; }
}
@media(max-width:900px) {
  .game-layout { grid-template-columns:1fr; }
}