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var(--space-4);border-radius:var(--radius-lg);font-size:var(--text-base);line-height:1.55}.bubble.assistant{background:var(--color-surface-raised);color:var(--color-text-primary);border:1px solid var(--color-border);border-bottom-left-radius:4px}.bubble.user{background:var(--color-primary);color:var(--color-text-on-accent);border-bottom-right-radius:4px}.bubble-figure-wrap{margin-top:var(--space-3);max-width:min(100%,520px)}.bubble-figure-wrap figcaption{margin-top:6px;font-size:var(--text-sm);font-weight:var(--font-semibold);letter-spacing:.01em;color:var(--color-text-primary)}.bubble-figure{display:block;width:100%;max-height:360px;object-fit:contain;border-radius:var(--radius-sm);background:#fff}@keyframes bubble-in{0%{opacity:0;transform:translateY(4px)}to{opacity:1;transform:translateY(0)}}.session-control-bar{flex:0 0 auto;display:flex;flex-wrap:wrap;justify-content:flex-end;gap:var(--space-2)}@media (max-width: 1024px){.session-layout{grid-template-columns:1fr}.session-rail{order:2;max-width:480px}.session-stage{grid-template-columns:1fr 1fr;grid-template-rows:minmax(0,1fr) minmax(0,1fr)}.session-stage .transcript-drawer{grid-column:1 / -1}.whiteboard{padding:var(--space-4)}.whiteboard-title{font-size:24px}.board-equation .katex{font-size:1.45em}}@media (max-width: 620px){.app{padding:var(--space-5) var(--space-4) var(--space-8)}.app-header{margin:calc(var(--space-1) * -1) calc(var(--space-1) * -1) var(--space-5);padding:var(--space-3) var(--space-1)}.brand-text h1{font-size:var(--text-md)}.session-hero{padding:var(--space-7) var(--space-5)}.session-hero-title{font-size:var(--text-xl)}.ai-presence--pill{padding:var(--space-2) var(--space-3)}.ai-presence--pill .ai-presence-label{max-width:120px}.bubble-line{max-width:92%}}@media (min-width: 621px) and (max-width: 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small{display:block;opacity:.75}.admin-detail{display:flex;flex-direction:column;gap:var(--space-3);align-items:flex-start}.admin-error{color:var(--red-400)}.admin-notice{color:inherit}@media (max-width: 800px){.admin-layout{grid-template-columns:1fr}}@media (max-width: 640px){.record-control{flex-wrap:wrap;justify-content:flex-end}.btn-record{padding:var(--space-1) var(--space-3);font-size:var(--text-sm)}}