#classroom {max-width:1400px;padding-top:20px}
.room-tools {display:flex;flex-wrap:wrap;gap:12px;align-items:center;margin-bottom:12px}
.room-tools label {display:flex;gap:8px;align-items:center}
.room-tools select {max-width:100%;padding:10px;border:1px solid #173449;border-radius:8px;font:inherit}
.room-tools input[type=checkbox] {width:20px;height:20px}
#room-status {min-height:24px}
#game-frame {display:block;width:100%;min-height:600px;border:1px solid #c9d4cf;border-radius:12px;background:#f9f3e8}
.private-teacher {border-left:5px solid #298165;background:#e7eee4;padding:14px 18px;margin:12px 0;border-radius:8px}
#private-prompt {white-space:pre-wrap;overflow-wrap:anywhere}
.mirror-heading {font-size:1.6rem;margin:8px 0}
.compact-note {font-size:.9rem;margin:8px 0}
@media(max-width:600px){#classroom{padding:12px}.room-tools{gap:8px}.room-tools label{width:100%}.room-tools select{width:100%;min-width:0}.room-tools button{flex:1}header{padding:14px}.private-teacher{padding:12px}#game-frame{min-height:700px}}