:root{--bg:#fff;--user-bubble:#e3f2fd;--assistant-bubble:#f5f5f5;--border:#e0e0e0;--text:#1a1a1a;--muted:#666;--accent:#1976d2;--error:#c62828;--ready:#2e7d32}*{box-sizing:border-box}html,body{height:100%;margin:0;padding:0}body{background:var(--bg);color:var(--text);font-family:system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial,sans-serif;font-size:16px;line-height:1.5}#app{border-left:1px solid var(--border);border-right:1px solid var(--border);flex-direction:column;max-width:900px;height:100vh;margin:0 auto;display:flex}.status-bar{border-bottom:1px solid var(--border);color:var(--muted);white-space:nowrap;text-overflow:ellipsis;background:#fafafa;flex:none;padding:10px 16px;font-size:.9rem;font-weight:600;overflow:hidden}.status-bar.status-loading,.status-bar.status-generating{color:var(--accent)}.status-bar.status-ready{color:var(--ready)}.status-bar.status-error{color:var(--error);background:#fdecea}#chat-messages{flex-direction:column;flex:auto;gap:12px;min-height:0;padding:16px;display:flex;overflow-y:auto}.message{flex-direction:column;max-width:70%;display:flex}.message-text{white-space:pre-wrap;word-wrap:break-word;overflow-wrap:anywhere;border-radius:14px;padding:10px 14px}.message-user{align-self:flex-end;align-items:flex-end}.message-user .message-text{background:var(--user-bubble);border-bottom-right-radius:4px}.message-assistant{align-self:flex-start;align-items:flex-start}.message-assistant .message-text{background:var(--assistant-bubble);border-bottom-left-radius:4px}.message-stats{color:var(--muted);font-variant-numeric:tabular-nums;margin-top:4px;padding:0 6px;font-size:.72rem}.input-area{border-top:1px solid var(--border);background:#fafafa;flex:none;gap:8px;padding:12px 16px;display:flex}#user-input{border:1px solid var(--border);border-radius:22px;outline:none;flex:auto;min-width:0;padding:10px 14px;font-family:inherit;font-size:1rem}#user-input:focus{border-color:var(--accent)}#user-input:disabled{cursor:not-allowed;background:#f0f0f0}.input-area button{cursor:pointer;background:var(--accent);color:#fff;border:none;border-radius:22px;flex:none;padding:10px 16px;font-family:inherit;font-size:.95rem;transition:background .15s}.input-area button:hover:not(:disabled){background:#1565c0}#clear-btn{color:var(--text);background:#eee}#clear-btn:hover:not(:disabled){background:#e0e0e0}.input-area button:disabled{opacity:.5;cursor:not-allowed}.loading-overlay{z-index:1000;background:#000000a6;justify-content:center;align-items:center;padding:16px;display:flex;position:fixed;inset:0}.loading-card{text-align:center;background:#fff;border-radius:12px;width:100%;max-width:440px;padding:28px;box-shadow:0 12px 40px #0000004d}.loading-title{margin:0 0 8px;font-size:1.2rem}.loading-subtitle{color:var(--muted);margin:0 0 20px;font-size:.9rem}.progress-track{background:#eee;border-radius:6px;width:100%;height:12px;overflow:hidden}.progress-fill{background:var(--accent);border-radius:6px;width:0%;height:100%;transition:width .3s}.progress-text{color:var(--muted);font-variant-numeric:tabular-nums;margin-top:10px;font-size:.85rem}@media (width<=600px){.message{max-width:85%}.input-area{flex-wrap:wrap}#user-input{flex:100%}}