:root,[data-theme=light]{--bg-primary:#fff;--bg-secondary:#f2f3f3;--bg-message-user:#f2f3f3;--bg-message-assistant:#fff;--bg-message-error:#fff1f0;--bg-input:#fff;--bg-sidebar:#f2f3f3;--bg-header:#fff;--text-primary:#16191f;--text-secondary:#545b64;--text-muted:#687078;--text-inverse:#fff;--border:#d5dbdb;--border-input:#aab7b8;--accent:#0972d3;--accent-hover:#033160;--accent-light:#e9f3ff;--error:#d13212;--error-bg:#fdf3f1;--shadow:0 1px 3px #00000014;--shadow-lg:0 4px 12px #0000001a;--radius:8px;--radius-lg:12px;--sans:-apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", sans-serif;--mono:ui-monospace, "SF Mono", Consolas, "Liberation Mono", monospace}[data-theme=dark]{--bg-primary:#0f1b2d;--bg-secondary:#1a2638;--bg-message-user:#1a2638;--bg-message-assistant:#0f1b2d;--bg-message-error:#1a0f0f;--bg-input:#1a2638;--bg-sidebar:#0a1628;--bg-header:#0f1b2d;--text-primary:#d1d5db;--text-secondary:#9aa5b4;--text-muted:#7d8998;--text-inverse:#fff;--border:#2a3a4e;--border-input:#3b4f68;--accent:#539fe5;--accent-hover:#89bcf0;--accent-light:#0f2b46;--error:#ff6b6b;--error-bg:#2d1515;--shadow:0 1px 3px #0000004d;--shadow-lg:0 4px 12px #0006}*{box-sizing:border-box;margin:0;padding:0}body{font-family:var(--sans);color:var(--text-primary);background:var(--bg-primary);-webkit-font-smoothing:antialiased;font-size:15px;line-height:1.6}#root{flex-direction:column;height:100vh;display:flex}.sign-in-page{text-align:center;background:var(--bg-primary);flex-direction:column;justify-content:center;align-items:center;gap:16px;min-height:100vh;padding:24px;display:flex}.sign-in-page h1{color:var(--text-primary);font-size:32px;font-weight:600}.sign-in-page p{color:var(--text-secondary);font-size:16px}.sign-in-button{border-radius:var(--radius);background:var(--accent);color:var(--text-inverse);cursor:pointer;border:none;padding:10px 32px;font-size:15px;font-weight:500;transition:background .2s}.sign-in-button:hover{background:var(--accent-hover)}.app-layout{background:var(--bg-primary);flex-direction:column;height:100vh;display:flex}.app-top-bar{background:var(--bg-header);border-bottom:1px solid var(--border);flex-shrink:0;justify-content:flex-end;align-items:center;gap:12px;min-height:48px;padding:8px 20px;display:flex}.user-email{color:var(--text-muted);font-size:13px}.sign-out-button,.theme-toggle{border:1px solid var(--border);color:var(--text-secondary);cursor:pointer;background:0 0;border-radius:6px;padding:6px 12px;font-size:13px;transition:all .2s}.sign-out-button:hover,.theme-toggle:hover{background:var(--bg-secondary);color:var(--text-primary)}.chat-page{flex-direction:column;flex:1;min-height:0;display:flex}.chat-page__header{background:var(--bg-header);border-bottom:1px solid var(--border);flex-shrink:0;align-items:center;gap:12px;padding:10px 20px;display:flex}.chat-page__header select{border:1px solid var(--border);background:var(--bg-input);color:var(--text-primary);cursor:pointer;border-radius:6px;max-width:320px;padding:6px 12px;font-size:13px}.new-chat-button{border:1px solid var(--border);color:var(--text-secondary);cursor:pointer;background:0 0;border-radius:6px;margin-left:auto;padding:6px 16px;font-size:13px;font-weight:500;transition:all .2s}.new-chat-button:hover{background:var(--bg-secondary);color:var(--text-primary)}.chat-page__messages{flex:1;padding:0;overflow-y:auto}.message-list{max-width:768px;margin:0 auto;padding:24px 20px}.message-bubble{border-bottom:1px solid var(--border);padding:20px 0}.message-bubble:last-child{border-bottom:none}.message-bubble__role{text-transform:uppercase;letter-spacing:.5px;margin-bottom:6px;font-size:13px;font-weight:600}.message-bubble--user .message-bubble__role{color:var(--accent)}.message-bubble--assistant .message-bubble__role{color:var(--text-muted)}.message-bubble--error .message-bubble__role{color:var(--error)}.message-bubble__content{color:var(--text-primary);white-space:pre-wrap;word-break:break-word;font-size:15px;line-height:1.7}.message-bubble--error .message-bubble__content{color:var(--error);background:var(--error-bg);border-radius:var(--radius);padding:10px 14px;font-size:14px}.retry-button{border:1px solid var(--error);color:var(--error);cursor:pointer;background:0 0;border-radius:6px;margin-top:8px;padding:6px 16px;font-size:13px;transition:all .2s}.retry-button:hover{background:var(--error-bg)}.loading-indicator{max-width:768px;color:var(--text-muted);align-items:center;gap:10px;margin:0 auto;padding:16px 20px;font-size:14px;display:flex}.loading-spinner{border:2px solid var(--border);border-top-color:var(--accent);border-radius:50%;width:18px;height:18px;animation:.8s linear infinite spin}@keyframes spin{to{transform:rotate(360deg)}}.sr-only{clip:rect(0, 0, 0, 0);border:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}.chat-page__input{border-top:1px solid var(--border);background:var(--bg-primary);flex-shrink:0;padding:16px 20px 24px}.prompt-input{background:var(--bg-input);border:1px solid var(--border-input);border-radius:var(--radius-lg);align-items:flex-end;gap:10px;max-width:768px;margin:0 auto;padding:10px 14px;transition:border-color .2s,box-shadow .2s;display:flex}.prompt-input:focus-within{border-color:var(--accent);box-shadow:0 0 0 2px var(--accent-light)}.prompt-input__textarea{resize:none;font-family:var(--sans);color:var(--text-primary);background:0 0;border:none;outline:none;flex:1;min-height:24px;max-height:200px;font-size:15px;line-height:1.5}.prompt-input__textarea::placeholder{color:var(--text-muted)}.prompt-input__submit{border-radius:var(--radius);background:var(--accent);color:var(--text-inverse);cursor:pointer;white-space:nowrap;border:none;padding:8px 20px;font-size:14px;font-weight:500;transition:background .2s,opacity .2s}.prompt-input__submit:hover:not(:disabled){background:var(--accent-hover)}.prompt-input__submit:disabled{opacity:.5;cursor:not-allowed}[data-testid=model-selector-loading],[data-testid=model-selector-error]{color:var(--text-muted);font-size:13px}[data-testid=model-selector-error]{color:var(--error)}