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small{color:#526e66}.teacher-study{margin-top:24px}.teacher-study-heading{display:flex;align-items:center;justify-content:space-between;gap:12px}.teacher-study-heading h2{margin:0;font-size:1.18rem}.teacher-study .study-panel{width:100%;max-height:none}.study-visibility{border-radius:20px;background:#f0f2f5;color:#66758a;padding:7px 10px;font-size:.73rem;font-weight:800;white-space:nowrap}.study-visibility.visible{background:#ddf7e9;color:#16764b}.teacher-study-controls{display:flex;align-items:center;gap:10px}.teacher-study-controls .secondary-button{padding:8px 11px;font-size:.8rem}.material-editor-backdrop{position:fixed;top:0;right:0;bottom:0;left:0;z-index:50;display:grid;place-items:center;padding:20px;background:#0c1c30a3}.material-editor{width:min(760px,100%);max-height:min(90vh,900px);overflow-y:auto;display:grid;gap:15px;background:#fff;border-radius:17px;padding:22px;box-shadow:0 24px 70px #00000040}.material-editor-heading{display:flex;justify-content:space-between;align-items:flex-start;gap:12px}.material-editor-heading h2{margin:0;font-size:1.55rem}.material-editor-heading button{border:0;background:#f0f3f7;border-radius:8px;width:34px;height:34px;display:grid;place-items:center}.material-editor-help{margin:0;color:var(--muted);font-size:.84rem;line-height:1.5}.material-editor-lines{display:grid;gap:12px;max-height:310px;overflow-y:auto;padding:2px 4px 2px 0}.material-editor-lines textarea{min-height:70px}.material-editor-preview{display:grid;gap:9px;padding:12px;border:1px solid var(--line);border-radius:10px;background:#f7faff}.material-editor-preview>button{display:inline-flex;align-items:center;justify-content:center;gap:8px;justify-self:start;border:1px solid #b8cafa;background:#fff;color:#194bb5;padding:9px 12px;border-radius:8px;font-weight:700}.material-editor-preview>button:disabled{opacity:.55;cursor:not-allowed}.material-editor-preview audio{width:100%}.material-editor-preview small{color:var(--muted)}.material-editor-actions{display:flex;justify-content:flex-end;gap:10px}.material-editor-actions>button:first-child{border:1px solid var(--line);background:#fff;color:var(--navy);padding:10px 14px;border-radius:9px;font-weight:700}@media(max-height:650px){.student-stage{padding-top:8px;padding-bottom:7px}.student-stage h1{font-size:1.7rem}.student-stage .study-panel{min-height:95px;margin:7px 0 3px}.student-stage-footer{gap:5px;padding-top:4px}.student-stage .large-avatar{width:58px;height:58px;font-size:1.15rem}.student-person span{font-size:.72rem}}@media(max-width:1100px){.teacher-layout{grid-template-columns:210px 1fr}.audio-panel{grid-column:1 / -1;border:0;border-top:1px solid var(--line);display:grid;grid-template-columns:repeat(3,1fr);align-items:end}.audio-panel .panel-heading,.audio-panel .upload-zone{grid-column:span 1}}@media(max-width:760px){.recording-evaluation-criteria{grid-template-columns:1fr}.recording-player-controls{flex-wrap:wrap}.recording-player-controls input[type=range]{order:2;flex-basis:calc(100% - 65px)}.recording-player-remaining{order:3}.recording-consent{padding:22px}.recording-consent-actions{flex-direction:column-reverse}.recording-consent-actions button{width:100%}.join-shell{grid-template-columns:1fr}.brand-panel{min-height:38vh;padding:36px 28px}.brand-copy h1{font-size:3.5rem}.sound-wave{display:none}.join-panel{padding:36px 24px}.topbar{padding:0 14px}.connection{display:none}.teacher-layout{display:block}.control-rail{border:0;border-bottom:1px solid var(--line);display:grid;grid-template-columns:1fr 1fr;gap:10px}.teacher-identity{grid-column:1 / -1}.talk-button{margin:0}.rail-stat,.rail-tip{display:none}.workspace{padding:22px 16px}.workspace-heading{align-items:flex-start;flex-direction:column}.audio-panel{display:flex}.student-stage{padding:10px 12px}.student-stage h1{font-size:clamp(1.4rem,6vw,2rem)}.student-stage .study-panel{margin:8px 0 4px}.conversation-orbit{width:min(100%,360px);grid-template-columns:minmax(72px,1fr) minmax(60px,1fr) minmax(72px,1fr);gap:4px}.orbit-line{width:auto;transform:none}.large-avatar{width:62px;height:62px;font-size:1.25rem}.student-person strong{max-width:110px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.live-banner,.student-notice{position:static;transform:none;margin-bottom:22px;white-space:normal}}