.auth-button{padding:12px 20px;margin:10px;border:none;border-radius:6px;font-size:16px;font-weight:500;cursor:pointer;transition:background-color .3s ease,transform .2s ease}.auth-button.login{background-color:#007bff26;color:#fff}.auth-button.login:hover{background-color:#07315fc1;transform:scale(1.03)}.auth-button.logout{cursor:pointer;border-radius:10px;background-color:#f44336;color:#fff}.auth-button.logout:hover{background-color:#d32f2f;transform:scale(1.03)}body{font-family:Inter,-apple-system,BlinkMacSystemFont,sans-serif;background:linear-gradient(135deg,#007bff,#00c4b4);color:#333;overflow-x:hidden}.hero{min-height:100vh;display:flex;flex-direction:column;justify-content:center;align-items:center;text-align:center;padding:40px 20px;position:relative;background:linear-gradient(135deg,#1d3045,#0d0b3f)}.hero-content{position:relative;z-index:2;max-width:900px;animation:fadeInUp 1s ease}@keyframes fadeInUp{0%{opacity:0;transform:translateY(30px)}to{opacity:1;transform:translateY(0)}}.hero h1{font-size:4rem;font-weight:700;color:#fff;margin-bottom:20px;line-height:1.2;letter-spacing:-1px}.hero p{font-size:1.4rem;color:#ffffffe6;max-width:700px;margin:0 auto 40px;font-weight:300;line-height:1.6}.features{display:flex;gap:30px;justify-content:center;flex-wrap:wrap;margin-bottom:40px}.feature-card{background:#ffffff1a;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border:1px solid rgba(255,255,255,.2);border-radius:20px;padding:30px;width:250px;transition:transform .3s ease,box-shadow .3s ease}.feature-card:hover{transform:translateY(-10px);box-shadow:0 20px 40px #0000004d}.feature-icon{font-size:3rem;margin-bottom:15px}.feature-card h3{color:#fff;font-size:1.3rem;margin-bottom:10px;font-weight:600}.feature-card p{color:#fffc;font-size:.95rem;line-height:1.5}.cta-button{background:linear-gradient(135deg,#132f65,#112836);color:#fff;padding:18px 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.bubble{background:linear-gradient(135deg,#007bff,#00c4b4);color:#fff;border-bottom-right-radius:4px;box-shadow:0 2px 8px #007bff4d}.timestamp{font-size:.7rem;color:#94a3b8;margin-top:5px;display:block}.typing-indicator{display:none;align-items:center;gap:10px;padding:15px;background:#fff;border-radius:18px;width:fit-content;margin:15px 0;box-shadow:0 2px 8px #00000014}.typing-indicator.active{display:flex}.typing-dots{display:flex;gap:4px}.typing-dots span{width:8px;height:8px;background:#007bff;border-radius:50%;animation:typing 1.4s infinite}.typing-dots span:nth-child(2){animation-delay:.2s}.typing-dots span:nth-child(3){animation-delay:.4s}@keyframes typing{0%,60%,to{transform:translateY(0)}30%{transform:translateY(-10px)}}.chat-input{padding:20px;border-top:1px solid #e2e8f0;background:#fff;display:flex;gap:10px;align-items:center}.chat-input input{flex:1;padding:14px 20px;border:2px solid #e2e8f0;border-radius:25px;outline:none;font-size:14.5px;transition:all .3s 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infinite;min-height:100vh;overflow:hidden;position:relative}body:before{content:"";position:absolute;inset:0;background:radial-gradient(circle at 20% 30%,rgba(255,255,255,.15) 0%,transparent 50%),radial-gradient(circle at 80% 70%,rgba(0,196,180,.2) 0%,transparent 50%),radial-gradient(circle at 40% 80%,rgba(0,123,255,.15) 0%,transparent 50%);pointer-events:none;z-index:0}@keyframes gradientShift{0%{background-position:0% 50%}50%{background-position:100% 50%}to{background-position:0% 50%}}.app-container{display:flex;flex-direction:column;height:100vh;overflow:hidden;position:relative;z-index:1}.chat-header{background:#fffffffa;-webkit-backdrop-filter:blur(30px);backdrop-filter:blur(30px);border-bottom:1px solid rgba(255,255,255,.5);padding:1.25rem 2rem;z-index:100;box-shadow:0 8px 32px #007bff26;display:flex;justify-content:space-around}.header-container{display:flex;justify-content:space-around;align-items:center;max-width:100%}.header-left{padding-right:40px;display:flex;align-items:center;gap:1.25rem}.logo-container{position:relative;width:56px;height:56px;background:linear-gradient(135deg,#007bff,#00c4b4);border-radius:16px;display:flex;align-items:center;justify-content:center;box-shadow:0 8px 24px #007bff66;overflow:hidden}.logo-container:before{content:"";position:absolute;top:-50%;left:-50%;width:200%;height:200%;background:linear-gradient(45deg,transparent,rgba(255,255,255,.15),transparent);animation:shimmer 3s infinite}@keyframes shimmer{0%{transform:translate(-100%) translateY(-100%) rotate(45deg)}to{transform:translate(100%) translateY(100%) rotate(45deg)}}.logo-icon{width:26px;height:26px;color:#fff;z-index:2;filter:drop-shadow(0 2px 4px rgba(0,0,0,.2))}.pulse-icon{position:absolute;width:20px;height:20px;color:#ffffffe6;animation:pulse 2.5s ease-in-out 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h3{font-size:1.125rem;font-weight:800;margin:0;background:linear-gradient(135deg,#007bff,#00c4b4);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.sidebar-icon{width:22px;height:22px;color:#007bff}.close-btn{background:#007bff0d;border:none;cursor:pointer;padding:.625rem;border-radius:10px;color:#007bff;display:flex;align-items:center;justify-content:center;transition:all .3s ease}.close-btn:hover{background:#007bff26;transform:scale(1.05)}.sidebar-content{flex:1;overflow-y:auto;padding:1.25rem}.sidebar-content::-webkit-scrollbar{width:5px}.sidebar-content::-webkit-scrollbar-track{background:transparent}.sidebar-content::-webkit-scrollbar-thumb{background:linear-gradient(180deg,#007bff,#00c4b4);border-radius:3px}.sidebar-content::-webkit-scrollbar-thumb:hover{background:linear-gradient(180deg,#0056b3,#009688)}.history-item{display:flex;align-items:center;gap:.875rem;padding:1rem 1.125rem;margin-bottom:.625rem;background:#fff;border:2px solid 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.history-text{color:#007bff;font-weight:700}.context-input-section{display:flex;flex-direction:column;gap:.875rem;margin-bottom:1.75rem}.context-input{width:100%;padding:1rem 1.25rem;border:2px solid rgba(0,123,255,.15);border-radius:12px;font-size:.9rem;background:#fff;color:#1a202c;transition:all .3s cubic-bezier(.4,0,.2,1);font-weight:500}.context-input:hover{border-color:#007bff40;box-shadow:0 4px 16px #007bff14}.context-input:focus{outline:none;border-color:#007bff;box-shadow:0 0 0 4px #007bff1f;transform:translateY(-1px)}.context-input::placeholder{color:#94a3b8;font-weight:500}.add-context-btn{padding:1rem 1.25rem;border:none;border-radius:12px;font-weight:700;font-size:.9rem;cursor:pointer;display:flex;align-items:center;justify-content:center;gap:.625rem;transition:all .3s cubic-bezier(.4,0,.2,1);position:relative;overflow:hidden}.add-context-btn.active{background:linear-gradient(135deg,#007bff,#00c4b4);color:#fff;box-shadow:0 6px 24px 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ease-out}.context-chip:hover{background:linear-gradient(135deg,#007bff26,#00c4b426);transform:translateY(-2px);box-shadow:0 6px 24px #007bff40;border-color:#007bff59}.context-text{flex:1;line-height:1.5;position:relative;z-index:1}.remove-context-btn{background:#dc26261a;border:none;color:#dc2626;font-size:1.125rem;font-weight:700;cursor:pointer;padding:0;width:24px;height:24px;display:flex;align-items:center;justify-content:center;border-radius:50%;transition:all .3s cubic-bezier(.4,0,.2,1);position:relative;z-index:1}.remove-context-btn:hover{background:#dc2626;color:#fff;transform:rotate(90deg) scale(1.15);box-shadow:0 4px 16px #dc262659}.empty-sidebar{text-align:center;padding:3.5rem 2rem;color:#64748b;background:linear-gradient(135deg,#007bff08,#00c4b408);border-radius:16px;border:2px dashed rgba(0,123,255,.15)}.empty-icon{width:56px;height:56px;color:#007bff4d;margin:0 auto 1.25rem;animation:float 3.5s ease-in-out infinite}@keyframes float{0%,to{transform:translateY(0)}50%{transform:translateY(-12px)}}.empty-sidebar p{font-size:.925rem;font-weight:600;margin:0;line-height:1.6;color:#475569}.chat-main{flex:1;display:flex;flex-direction:column;position:relative;overflow:hidden}.toggle-btn{position:absolute;top:1.25rem;z-index:10;background:#fffffffa;-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);border:2px solid #007bff;border-radius:14px;padding:.875rem;cursor:pointer;display:flex;align-items:center;justify-content:center;color:#007bff;box-shadow:0 6px 24px #007bff4d;transition:all .3s cubic-bezier(.4,0,.2,1)}.toggle-btn:hover{transform:scale(1.08);box-shadow:0 8px 32px #007bff66;background:linear-gradient(135deg,#007bff1a,#00c4b41a)}.toggle-btn:active{transform:scale(.95)}.left-toggle{left:1.25rem}.right-toggle{right:1.25rem}.messages-container{flex:1;overflow-y:auto;padding:2.5rem 0;scroll-behavior:smooth}.messages-container::-webkit-scrollbar{width:7px}.messages-container::-webkit-scrollbar-track{background:#ffffff1a;border-radius:4px}.messages-container::-webkit-scrollbar-thumb{background:linear-gradient(180deg,#ffffff4d,#ffffff80);border-radius:4px}.messages-container::-webkit-scrollbar-thumb:hover{background:linear-gradient(180deg,#ffffff80,#ffffffb3)}.messages-wrapper{max-width:850px;margin:0 auto;padding:0 2rem;display:flex;flex-direction:column;gap:1.75rem}.welcome-message{display:flex;justify-content:center;align-items:center;padding:3.5rem 0;animation:fadeInUp 1.2s ease-out}@keyframes fadeInUp{0%{opacity:0;transform:translateY(40px)}to{opacity:1;transform:translateY(0)}}.welcome-content{text-align:center;background:#fffffffa;-webkit-backdrop-filter:blur(30px);backdrop-filter:blur(30px);padding:3.5rem 3rem;border-radius:24px;box-shadow:0 20px 60px #007bff33;max-width:550px;border:1px solid rgba(255,255,255,.5)}.welcome-icon{width:90px;height:90px;background:linear-gradient(135deg,#007bff,#00c4b4);border-radius:50%;display:flex;align-items:center;justify-content:center;margin:0 auto 2rem;box-shadow:0 12px 40px #007bff66;animation:pulse 3s ease-in-out infinite;position:relative}.welcome-icon:after{content:"";position:absolute;inset:-10px;border-radius:50%;background:linear-gradient(135deg,#007bff,#00c4b4);opacity:.3;filter:blur(20px);z-index:-1}.welcome-icon svg{width:44px;height:44px;color:#fff;filter:drop-shadow(0 2px 8px rgba(0,0,0,.2))}.welcome-content h2{font-size:2rem;font-weight:900;color:#1a202c;margin-bottom:1.25rem;background:linear-gradient(135deg,#007bff,#00c4b4);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.welcome-content p{font-size:1.125rem;color:#475569;line-height:1.7;margin:0;font-weight:500}.message-container{display:flex;gap:1.125rem;opacity:0;transform:translateY(25px);transition:all .7s 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