.chat-view{height: 100vh;overflow: hidden;background: var(--q-bg);color: var(--q-text)}.chat-sidebar{border-right: 1px solid var(--q-line);padding: 16px 12px;overflow-y: auto;flex-shrink: 0}.chat-brand{font-family: var(--q-font-display);font-weight: 700;font-size: 1.15rem}.chat-new{margin-top: 4px}.chat-history{margin-top: 12px;gap: 2px}.chat-history-item{display: block;padding: 8px 10px;border-radius: 8px;text-decoration: none;color: inherit;font-size: .9rem;overflow: hidden;text-overflow: ellipsis;white-space: nowrap}.chat-history-item:hover{background: rgba(255,255,255,.06)}.chat-history-item.active{background: rgba(99,234,208,.12);font-weight: 600}.chat-header{padding: 12px 20px;border-bottom: 1px solid var(--q-line)}.chat-title{font-family: var(--q-font-display);margin: 0;font-size: 1.1rem}.chat-timeout{--vaadin-input-field-height: 32px;flex-shrink: 0;font-size: .88rem}.chat-scroller{overflow-y: auto;padding: 24px 20px}.chat-messages{max-width: 820px;margin: 0 auto;width: 100%}.chat-msg-user{align-self: flex-end;color: var(--q-text);background: rgba(16,163,127,.10);border: 1px solid rgba(16,163,127,.25);border-radius: 14px;padding: 12px 16px;max-width: 85%}.chat-msg-ai{background: var(--q-panel);border: 1px solid var(--q-line);border-radius: 14px;padding: 12px 16px;max-width: 95%}.chat-msg-body{line-height: 1.6;overflow-wrap: anywhere}.chat-msg-body pre{background: rgba(0,0,0,.35);padding: 10px 12px;border-radius: 8px;overflow-x: auto}.chat-msg-body code{font-family: ui-monospace,SFMono-Regular,Menlo,monospace;font-size: .92em}.chat-badge{display: inline-block;margin-top: 8px;padding: 2px 8px;border-radius: 999px;font-size: .72rem;letter-spacing: .02em;background: rgba(255,255,255,.08);opacity: .85}.chat-badge.fallback{background: rgba(255,170,0,.22);font-weight: 600}.chat-reasoning{margin-bottom: 10px;border: 1px solid var(--q-line);border-radius: 10px;padding: 0 10px;background: rgba(255,255,255,.04)}.chat-reasoning-body{font-size: .88rem;opacity: .85;white-space: pre-wrap;max-height: 320px;overflow-y: auto}.chat-warning{display: block;margin-top: 8px;padding: 6px 10px;border-radius: 8px;font-size: .82rem;background: rgba(255,170,0,.18);border: 1px solid rgba(255,170,0,.4)}.chat-hint,.chat-error{border-radius: 10px;padding: 10px 14px;font-size: .9rem}.chat-hint{background: rgba(255,255,255,.06)}.chat-error{background: rgba(220,60,60,.12);border: 1px solid rgba(220,60,60,.35)}.katex-display{overflow-x: auto;overflow-y: hidden;padding: 2px 0}.chat-composer{padding: 12px 20px 18px;border-top: 1px solid var(--q-line)}.chat-attachment{font-size: .85rem;opacity: .8}.print-view{background: #fff;color: #111;padding: 24px}.print-toolbar{max-width: 820px;margin: 0 auto 12px}.print-document{max-width: 820px;margin: 0 auto;line-height: 1.6}.print-meta{display: block;font-size: .85rem;opacity: .7;margin-bottom: 20px}.print-question{border-left: 3px solid rgba(16,163,127,.8);padding: 6px 0 6px 14px;margin: 18px 0;font-weight: 600}.print-answer{margin: 0 0 22px}@media print{.print-toolbar,.chat-sidebar,.chat-header,.chat-composer{display: none !important}.print-view{padding: 0}.print-question{break-inside: avoid}.print-answer{break-inside: auto}}