/* A scene header and actual speaking roles frame a single history stream. */
html[data-layout="stage"] .chat-container {max-width:1120px;background:var(--bg-card)}
html[data-layout="stage"] .skin-stage {padding:24px 36px;background:var(--bg-tertiary);border-bottom:1px solid var(--border);position:relative}
html[data-layout="stage"] .skin-stage-caption {font-size:.75rem;color:var(--text-muted);letter-spacing:.2em}
html[data-layout="stage"] .skin-stage-title {font-family:Georgia,'Noto Serif SC',serif;font-size:clamp(1.5rem,3vw,2.5rem);margin:8px 0 12px;overflow-wrap:anywhere}
html[data-layout="stage"] .skin-stage-speaker {color:var(--accent);margin:0;font-size:.85rem}
html[data-layout="stage"] .skin-role-seats {margin-top:16px;color:var(--text-secondary);font-size:.8rem;line-height:1.8}
html[data-layout="stage"] .messages-area {padding:24px clamp(18px,5vw,70px);background:var(--bg)}
html[data-layout="stage"] .msg.ai {padding-left:0}
html[data-layout="stage"] .msg.ai .bubble {border-left:3px solid var(--accent);border-radius:4px}
html[data-layout="stage"] .workspace-rooms {display:none}
html[data-layout="stage"] .skin-nav-collapsed>.navbar {display:none}
html[data-layout="stage"] .skin-nav-collapsed .chat-container {height:100dvh}
html[data-layout="stage"] .chat-container:focus-within .skin-stage {padding:12px 28px}
html[data-layout="stage"] .chat-container:has(.input-area textarea:focus) .skin-role-seats {display:none}
@media(max-width:767px) {html[data-layout="stage"] .skin-stage {padding:12px 18px}html[data-layout="stage"] .skin-stage-title {font-size:1.4rem;margin:4px 0}html[data-layout="stage"] .skin-role-seats {margin-top:6px}html[data-layout="stage"] .input-area:focus-within~.skin-stage {display:none}}