*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Fira Sans,Droid Sans,Helvetica Neue,sans-serif;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;color:#333;background:#f5f5f5}#root{width:100%;min-height:100vh}.app-loading{display:flex;justify-content:center;align-items:center;height:100vh}.loading-spinner{font-size:1.125rem;color:#666}.login-page{display:flex;justify-content:center;align-items:center;min-height:100vh;background:linear-gradient(135deg,#667eea,#764ba2)}.login-container{background:#fff;border-radius:8px;padding:3rem;box-shadow:0 10px 40px #0000001a;max-width:400px;width:100%}.login-header{text-align:center;margin-bottom:2rem}.login-header h1{font-size:2rem;color:#333;margin-bottom:.5rem}.login-header .subtitle{color:#666;font-size:.875rem}.login-content{text-align:center}.login-content p{margin-bottom:1.5rem;color:#666;line-height:1.6}.login-button{width:100%;padding:.875rem 1.5rem;background:#007bff;color:#fff;border:none;border-radius:4px;font-size:1rem;font-weight:500;cursor:pointer;transition:background .2s}.login-button:hover{background:#0056b3}.login-button:active{background:#004085}.auth-callback{display:flex;justify-content:center;align-items:center;min-height:100vh}.callback-container{text-align:center;padding:2rem}.error-message{background:#fff;border-radius:8px;padding:2rem;box-shadow:0 4px 12px #0000001a;max-width:500px}.error-message h2{color:#dc3545;margin-bottom:1rem}.error-message p{color:#666;margin-bottom:1.5rem}.chat-messages-container{height:100%}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.error-message button{padding:.5rem 1rem;background:#007bff;color:#fff;border:none;border-radius:4px;cursor:pointer}.error-message button:hover{background:#0056b3}