:root{--color-primary: #0071E3;--color-primary-hover: #0077ED;--color-primary-active: #006EDB;--color-text: #1d1d1f;--color-text-secondary: #6e6e73;--color-background: #fbfbfd;--color-surface: #f5f5f7;--color-border: #d2d2d7;--color-error: #FF3B30;--color-success: #34C759;--color-focus: #0071E3;--space-xs: .25rem;--space-sm: .5rem;--space-md: 1rem;--space-lg: 1.5rem;--space-xl: 2rem;--space-2xl: 3rem;--font-system: -apple-system, BlinkMacSystemFont, "Segoe UI", "Roboto", "Oxygen", "Ubuntu", "Cantarell", "Fira Sans", "Droid Sans", "Helvetica Neue", sans-serif;--font-size-sm: .875rem;--font-size-base: 1rem;--font-size-lg: 1.125rem;--font-size-xl: 1.5rem;--font-size-2xl: 2rem;--line-height-tight: 1.25;--line-height-normal: 1.5;--line-height-relaxed: 1.75;--border-radius-sm: .375rem;--border-radius-md: .75rem;--border-radius-lg: 1rem;--border-width: 1px;--shadow-sm: 0 1px 3px rgba(0, 0, 0, .04);--shadow-md: 0 4px 6px rgba(0, 0, 0, .05);--shadow-lg: 0 10px 15px rgba(0, 0, 0, .08);--shadow-focus: 0 0 0 3px rgba(0, 122, 255, .3);--transition-fast: .15s ease-in-out;--transition-normal: .25s ease-in-out;--transition-slow: .35s ease-in-out}@media (prefers-color-scheme: dark){:root{--color-primary: #2997FF;--color-primary-hover: #409CFF;--color-primary-active: #66B0FF;--color-text: #f5f5f7;--color-text-secondary: #a1a1a6;--color-background: #000000;--color-surface: #1d1d1f;--color-border: #424245;--color-error: #FF453A;--color-success: #32D74B}}@media (prefers-reduced-motion: reduce){*,*:before,*:after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}}*,*:before,*:after{box-sizing:border-box}*{margin:0;padding:0}html{font-size:16px;scroll-behavior:smooth}body{font-family:var(--font-system);font-size:var(--font-size-base);line-height:var(--line-height-normal);color:var(--color-text);background-color:var(--color-background);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}#root{min-height:100vh}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border-width:0}.skip-link{position:absolute;top:-100px;left:0;background:var(--color-primary);color:#fff;padding:var(--space-sm) var(--space-md);text-decoration:none;border-radius:0 0 var(--border-radius-sm) 0;z-index:100;font-weight:600;transition:top var(--transition-fast)}.skip-link:focus{top:0;outline:2px solid var(--color-focus);outline-offset:2px}.container{max-width:56rem;margin:0 auto;padding:var(--space-md);min-height:100vh;display:flex;flex-direction:column}header{text-align:center;padding:var(--space-xl) 0 var(--space-lg);border-bottom:var(--border-width) solid var(--color-border);margin-bottom:var(--space-xl)}.header-content{display:flex;justify-content:space-between;align-items:center;margin-bottom:var(--space-sm)}#app-title{font-size:var(--font-size-2xl);font-weight:600;letter-spacing:-.01em;color:var(--color-text)}.sign-out-button{padding:.5rem 1rem;background:transparent;border:1px solid var(--color-border);border-radius:980px;color:var(--color-text);font-size:.875rem;font-weight:400;cursor:pointer;transition:all var(--transition-fast)}.sign-out-button:hover{background:var(--color-surface);border-color:var(--color-text-secondary)}.sign-out-button:focus{outline:2px solid var(--color-focus);outline-offset:2px}.subtitle{font-size:var(--font-size-lg);color:var(--color-text-secondary);font-weight:400}main{flex:1;display:flex;flex-direction:column;gap:var(--space-lg);padding-bottom:var(--space-xl)}.chat-messages{flex:1;overflow-y:auto;display:flex;flex-direction:column;gap:var(--space-md);padding:var(--space-sm);min-height:300px;max-height:600px;scroll-behavior:smooth;scrollbar-width:thin;scrollbar-color:var(--color-border) transparent}.chat-messages::-webkit-scrollbar{width:8px}.chat-messages::-webkit-scrollbar-track{background:transparent}.chat-messages::-webkit-scrollbar-thumb{background-color:var(--color-border);border-radius:var(--border-radius-lg)}.chat-messages::-webkit-scrollbar-thumb:hover{background-color:var(--color-text-secondary)}.message{display:flex;flex-direction:column;max-width:80%;animation:messageSlideIn var(--transition-normal)}@keyframes messageSlideIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.message.user{align-self:flex-end}.message.assistant{align-self:flex-start}.message-content{padding:var(--space-md) var(--space-lg);border-radius:var(--border-radius-lg);background-color:var(--color-surface);box-shadow:var(--shadow-sm);word-wrap:break-word}.message.user .message-content{background-color:var(--color-primary);color:#fff;border-bottom-right-radius:var(--border-radius-sm)}.message.assistant .message-content{background-color:var(--color-surface);color:var(--color-text);border-bottom-left-radius:var(--border-radius-sm)}.message-content p{margin-bottom:var(--space-sm)}.message-content p:last-child{margin-bottom:0}.message-content ul,.message-content ol{margin-left:var(--space-lg);margin-bottom:var(--space-sm)}.message-content li{margin-bottom:var(--space-xs)}.message-content strong{font-weight:600}.message-content a{color:var(--color-primary);text-decoration:underline;text-underline-offset:2px;transition:color var(--transition-fast)}.message-content a:hover{color:var(--color-primary-hover)}.message-content a:focus{outline:2px solid var(--color-focus);outline-offset:2px;border-radius:2px}.message.user .message-content a{color:#fff;text-decoration-color:#ffffffb3}.message.user .message-content a:hover{text-decoration-color:#fff}.message-feedback{display:flex;gap:var(--space-xs);margin-top:var(--space-sm);padding-left:var(--space-lg)}.feedback-btn{background:none;border:1px solid var(--color-border);border-radius:var(--border-radius-md);padding:var(--space-xs) var(--space-sm);font-size:1rem;cursor:pointer;transition:all var(--transition-fast);opacity:.6}.feedback-btn:hover:not(:disabled){opacity:1;border-color:var(--color-primary);transform:scale(1.1)}.feedback-btn:disabled{cursor:not-allowed}.feedback-btn.active{opacity:1;border-color:var(--color-primary);background-color:var(--color-surface)}.feedback-btn:focus{outline:2px solid var(--color-focus);outline-offset:2px}.message-content code{background-color:#00000014;padding:.125rem .25rem;border-radius:var(--border-radius-sm);font-family:Monaco,Menlo,Courier New,monospace;font-size:.9em;border:1px solid var(--color-border)}.message.user .message-content code{background-color:#fff3}.loading-indicator{display:none;align-items:center;gap:var(--space-xs);padding:var(--space-md);align-self:flex-start}.loading-indicator[aria-hidden=false]{display:flex}.loading-dot{width:8px;height:8px;background-color:var(--color-text-secondary);border-radius:50%;animation:dotPulse 1.4s infinite ease-in-out both}.loading-dot:nth-child(1){animation-delay:-.32s}.loading-dot:nth-child(2){animation-delay:-.16s}@keyframes dotPulse{0%,80%,to{opacity:.3;transform:scale(.8)}40%{opacity:1;transform:scale(1)}}.chat-form{display:flex;flex-direction:column;gap:var(--space-sm)}.input-wrapper{display:flex;gap:var(--space-sm);align-items:flex-end;padding:var(--space-sm);background-color:var(--color-surface);border:var(--border-width) solid var(--color-border);border-radius:var(--border-radius-lg);transition:border-color var(--transition-fast),box-shadow var(--transition-fast)}.input-wrapper:focus-within{border-color:var(--color-primary);box-shadow:var(--shadow-focus)}#chat-input{flex:1;border:none;background:transparent;font-family:var(--font-system);font-size:var(--font-size-base);line-height:var(--line-height-normal);color:var(--color-text);resize:none;outline:none;min-height:2.5rem;max-height:10rem}#chat-input::placeholder{color:var(--color-text-secondary)}#send-button{display:flex;align-items:center;justify-content:center;width:2.5rem;height:2.5rem;border:none;border-radius:50%;background-color:var(--color-primary);color:#fff;cursor:pointer;transition:background-color var(--transition-fast),transform var(--transition-fast);flex-shrink:0}#send-button:hover:not(:disabled){background-color:var(--color-primary-hover);transform:scale(1.05)}#send-button:active:not(:disabled){background-color:var(--color-primary-active);transform:scale(.95)}#send-button:disabled{background-color:var(--color-border);cursor:not-allowed;opacity:.5}#send-button:focus{outline:2px solid var(--color-focus);outline-offset:2px}.input-help{color:var(--color-text-secondary);font-size:var(--font-size-sm);padding:0 var(--space-sm)}.input-help kbd{background-color:var(--color-surface);padding:.125rem .375rem;border-radius:var(--border-radius-sm);border:var(--border-width) solid var(--color-border);font-family:var(--font-system);font-size:.85em}.error-message{display:none;padding:var(--space-md);background-color:var(--color-error);color:#fff;border-radius:var(--border-radius-md);margin-top:var(--space-sm);animation:shake .5s}.error-message[aria-hidden=false]{display:block}@keyframes shake{0%,to{transform:translate(0)}10%,30%,50%,70%,90%{transform:translate(-5px)}20%,40%,60%,80%{transform:translate(5px)}}footer{text-align:center;padding-top:var(--space-lg);border-top:var(--border-width) solid var(--color-border);color:var(--color-text-secondary)}footer p{margin-bottom:var(--space-sm)}footer a{color:var(--color-primary);text-decoration:none;transition:color var(--transition-fast)}footer a:hover{color:var(--color-primary-hover);text-decoration:underline}footer a:focus{outline:2px solid var(--color-focus);outline-offset:2px;border-radius:var(--border-radius-sm)}footer kbd{background-color:var(--color-surface);padding:.125rem .375rem;border-radius:var(--border-radius-sm);border:var(--border-width) solid var(--color-border);font-family:var(--font-system);font-size:.85em}a:focus,button:focus,textarea:focus,input:focus{outline:2px solid var(--color-focus);outline-offset:2px}@media (max-width: 768px){.container{padding:var(--space-sm)}header{padding:var(--space-lg) 0;margin-bottom:var(--space-lg)}#app-title{font-size:var(--font-size-xl)}.subtitle{font-size:var(--font-size-sm)}.message{max-width:90%}.chat-messages{max-height:500px}}@media (max-width: 480px){:root{font-size:14px}.message{max-width:95%}.input-help{font-size:.75rem}}@media print{.chat-form,.loading-indicator,.error-message,footer{display:none}.chat-messages{max-height:none;overflow:visible}}.login-container{display:flex;align-items:center;justify-content:center;min-height:100vh;background:var(--color-background);padding:var(--space-md)}.login-card{width:100%;max-width:400px;text-align:center}.login-title{font-size:3rem;font-weight:600;letter-spacing:-.01em;color:var(--color-text);margin-bottom:var(--space-xs)}.login-subtitle{font-size:var(--font-size-lg);color:var(--color-text-secondary);margin-bottom:var(--space-2xl);font-weight:400}.login-form{display:flex;flex-direction:column;gap:var(--space-md)}.form-group{text-align:left}.login-form input{width:100%;padding:.875rem 1rem;font-size:1.0625rem;font-family:var(--font-system);color:var(--color-text);background:var(--color-background);border:1px solid var(--color-border);border-radius:12px;outline:none;transition:all var(--transition-fast)}.login-form input::placeholder{color:var(--color-text-secondary)}.login-form input:focus{border-color:var(--color-primary);box-shadow:0 0 0 4px #0071e31a}.login-form input:disabled{opacity:.5;cursor:not-allowed}.login-button{width:100%;padding:.875rem 1rem;font-size:1.0625rem;font-weight:400;color:#fff;background:var(--color-primary);border:none;border-radius:980px;cursor:pointer;transition:all var(--transition-fast);margin-top:var(--space-sm)}.login-button:hover:not(:disabled){background:var(--color-primary-hover);transform:scale(1.01)}.login-button:active:not(:disabled){background:var(--color-primary-active);transform:scale(.99)}.login-button:disabled{opacity:.5;cursor:not-allowed}.login-button:focus{outline:2px solid var(--color-focus);outline-offset:4px}.login-error{padding:var(--space-md);background:var(--color-error);color:#fff;border-radius:12px;font-size:var(--font-size-sm);text-align:left}.auth-loading{display:flex;align-items:center;justify-content:center;min-height:100vh;background:var(--color-background)}.loading-spinner{width:40px;height:40px;border:3px solid var(--color-surface);border-top-color:var(--color-primary);border-radius:50%;animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.staging-banner{position:fixed;top:0;left:0;right:0;z-index:9999;background:linear-gradient(135deg,#ff9500,#ff6b00);color:#fff;padding:.5rem 1rem;display:flex;align-items:center;justify-content:center;gap:.5rem;font-size:.875rem;font-weight:500;box-shadow:0 2px 8px #0000001a;border-bottom:1px solid rgba(255,255,255,.2)}.staging-icon{font-size:1rem}.staging-text{letter-spacing:.02em;text-transform:uppercase}body:has(.staging-banner){padding-top:2.5rem}@media (max-width: 480px){.staging-banner{font-size:.75rem;padding:.4rem .75rem}body:has(.staging-banner){padding-top:2.2rem}}.login-environment-badge{display:inline-flex;align-items:center;gap:.5rem;padding:.75rem 1.25rem;background:linear-gradient(135deg,#ff9500,#ff6b00);color:#fff;border-radius:12px;font-size:.875rem;font-weight:500;margin-bottom:var(--space-xl);box-shadow:0 4px 12px #ff95004d;border:1px solid rgba(255,255,255,.2)}.environment-icon{font-size:1.125rem}.environment-label{letter-spacing:.02em;text-transform:uppercase}@media (prefers-color-scheme: dark){.login-environment-badge{box-shadow:0 4px 12px #ff950066}}