:root{--bg: #0f0f0f;--surface: #141416;--elevated: #1e1e22;--border: rgba(255, 255, 255, .08);--border-bright: rgba(255, 255, 255, .12);--accent: #1488fc;--accent-glow: rgba(20, 136, 252, .3);--text-primary: #ececec;--text-secondary: #8a8a8f;--text-muted: #5a5a5f;--radius: 16px}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}body{font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;background:radial-gradient(ellipse 100% 60% at 50% 100%,rgba(20,136,252,.13) 0%,transparent 55%),radial-gradient(ellipse 70% 40% at 50% 50%,rgba(20,136,252,.04) 0%,transparent 70%),var(--bg);color:var(--text-primary);height:100vh;overflow:hidden;-webkit-font-smoothing:antialiased}#root{height:100vh;display:flex;flex-direction:column}.nav-menu{display:flex;align-items:center;justify-content:space-between;padding:0 24px;height:56px;background-color:#0e0e10d9;backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-bottom:1px solid var(--border);flex-shrink:0;position:relative;z-index:10}.nav-brand{font-size:1rem;font-weight:700;color:var(--accent);letter-spacing:-.02em}.nav-links{display:flex;gap:4px}.nav-link{text-decoration:none;color:var(--text-secondary);padding:6px 16px;border-radius:20px;font-size:.875rem;font-weight:500;transition:background-color .2s,color .2s}.nav-link:hover{background-color:#ffffff0f;color:var(--text-primary)}.nav-link.active{background-color:#ffffff14;color:var(--text-primary)}.conversation-item{display:flex;align-items:center;justify-content:space-between;padding:8px 12px;border-radius:8px;cursor:pointer;min-height:40px;border:1px solid transparent;transition:background-color .15s,border-color .15s}.conversation-item:hover{background-color:#ffffff0f}.conversation-item.selected{background-color:#1488fc14;border-color:#1488fc33}.conversation-title{font-size:.825rem;color:var(--text-secondary);overflow:hidden;text-overflow:ellipsis;white-space:nowrap;flex:1;min-width:0}.conversation-item.selected .conversation-title{color:var(--text-primary)}.delete-btn{background:none;border:none;cursor:pointer;font-size:.75rem;padding:3px 5px;border-radius:4px;opacity:0;flex-shrink:0;margin-left:6px;transition:opacity .15s,background-color .15s,color .15s;color:var(--text-muted)}.conversation-item:hover .delete-btn{opacity:1}.delete-btn:hover{background-color:#ff50501f;color:#ff6b6b}.sidebar{width:260px;min-width:260px;background-color:#0e0e10bf;backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-right:1px solid var(--border);display:flex;flex-direction:column;padding:12px 8px;overflow:hidden;position:relative;z-index:5}.new-chat-btn{background-color:transparent;border:1px solid var(--border-bright);color:var(--text-secondary);padding:10px 16px;border-radius:10px;cursor:pointer;font-size:.875rem;font-weight:500;font-family:inherit;margin-bottom:14px;text-align:left;transition:background-color .2s,color .2s,border-color .2s;flex-shrink:0}.new-chat-btn:hover{background-color:#ffffff0d;border-color:var(--accent);color:var(--text-primary)}.conversations-list{flex:1;overflow-y:auto;display:flex;flex-direction:column;gap:2px}.conversations-list::-webkit-scrollbar{width:3px}.conversations-list::-webkit-scrollbar-thumb{background-color:#ffffff1a;border-radius:2px}.message-bubble{display:flex;padding:4px 15%}.message-bubble.user{justify-content:flex-end}.message-bubble.assistant{justify-content:flex-start}.bubble-content{max-width:72%;padding:12px 16px;border-radius:16px;line-height:1.7;font-size:.925rem;white-space:pre-wrap;word-break:break-word}.message-bubble.user .bubble-content{background-color:var(--elevated);color:var(--text-primary);border:1px solid var(--border);border-bottom-right-radius:4px}.message-bubble.assistant .bubble-content{background-color:transparent;color:var(--text-primary);padding-left:0;border-bottom-left-radius:4px}.thinking-wrapper{display:flex;padding:4px 15%;justify-content:flex-start}.thinking-dots{display:flex;align-items:center;gap:6px;padding:14px 4px;min-width:54px}.thinking-dots span{width:7px;height:7px;background-color:var(--accent);border-radius:50%;opacity:.5;animation:thinking-bounce 1.2s ease-in-out infinite}.thinking-dots span:nth-child(1){animation-delay:0s}.thinking-dots span:nth-child(2){animation-delay:.2s}.thinking-dots span:nth-child(3){animation-delay:.4s}@keyframes thinking-bounce{0%,60%,to{transform:translateY(0);opacity:.3}30%{transform:translateY(-8px);opacity:1}}.chat-page{flex:1;display:flex;flex-direction:column;background:transparent;overflow:hidden}.messages-container{flex:1;overflow-y:auto;padding:24px 0 12px;display:flex;flex-direction:column}.messages-container::-webkit-scrollbar{width:4px}.messages-container::-webkit-scrollbar-thumb{background-color:#ffffff1a;border-radius:2px}.chat-page:has(.empty-chat){justify-content:center}.chat-page:has(.empty-chat) .messages-container{flex:none;overflow:visible;padding:0}.chat-page:has(.empty-chat) .input-area{padding-top:0;padding-bottom:0}.empty-chat{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:10px;padding-bottom:28px}.empty-chat h2{font-size:2rem;font-weight:700;letter-spacing:-.03em;color:var(--text-primary)}.empty-chat h2 .accent-word{background:linear-gradient(135deg,var(--accent) 0%,#7dd3fc 100%);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.empty-chat p{font-size:.95rem;color:var(--text-muted);font-weight:400}.input-area{padding:16px 15%;flex-shrink:0}.input-wrapper{display:flex;align-items:flex-end;gap:8px;padding:12px 12px 12px 16px;background-color:var(--elevated);border:1px solid var(--border-bright);border-radius:var(--radius);box-shadow:0 0 0 1px #ffffff08,0 4px 24px #0006;transition:border-color .2s,box-shadow .2s}.input-wrapper:focus-within{border-color:#1488fc73;box-shadow:0 0 0 1px #1488fc1a,0 4px 24px #0006}.chat-input{flex:1;background-color:transparent;border:none;color:var(--text-primary);font-size:.95rem;font-family:inherit;resize:none;min-height:24px;max-height:200px;line-height:1.6;outline:none;overflow-y:auto}.chat-input::placeholder{color:var(--text-muted)}.chat-input:disabled{opacity:.5;cursor:not-allowed}.send-btn{background-color:var(--accent);border:none;border-radius:10px;color:#fff;font-size:1.1rem;width:36px;height:36px;display:flex;align-items:center;justify-content:center;cursor:pointer;flex-shrink:0;transition:background-color .2s,box-shadow .2s,transform .1s;box-shadow:0 0 16px var(--accent-glow)}.send-btn:hover:not(:disabled){background-color:#1a94ff;box-shadow:0 0 28px var(--accent-glow)}.send-btn:active:not(:disabled){transform:scale(.94)}.send-btn:disabled{background-color:#ffffff12;color:var(--text-muted);cursor:not-allowed;box-shadow:none}.about-page{flex:1;overflow-y:auto;background:transparent;padding:48px 20%;scrollbar-width:thin;scrollbar-color:rgba(20,136,252,.3) transparent}.about-page::-webkit-scrollbar{width:5px}.about-page::-webkit-scrollbar-track{background:transparent}.about-page::-webkit-scrollbar-thumb{background-color:#1488fc4d;border-radius:3px}.about-page::-webkit-scrollbar-thumb:hover{background-color:#1488fc8c}.about-content{max-width:720px;margin:0 auto}.about-content h1{font-size:2rem;font-weight:700;letter-spacing:-.03em;margin-bottom:40px;background:linear-gradient(135deg,#ffffff 30%,var(--accent) 100%);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.about-section{margin-bottom:16px;background-color:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:24px;transition:border-color .2s}.about-section:hover{border-color:var(--border-bright)}.about-section h2{font-size:.8rem;text-transform:uppercase;letter-spacing:.1em;font-weight:600;color:var(--accent);margin-bottom:16px}.about-section p{color:var(--text-secondary);line-height:1.75;margin-bottom:8px;font-size:.925rem}.about-section p strong{color:var(--text-primary);font-weight:600}.about-section ul{list-style:none;padding:0;margin-top:4px;display:flex;flex-direction:column;gap:6px}.about-section ul li{color:var(--text-secondary);font-size:.9rem;line-height:1.6;padding:8px 12px;background-color:#ffffff06;border-radius:8px;border:1px solid var(--border)}.about-section ul li strong{color:var(--text-primary);font-weight:500}.not-found-page{display:flex;flex-direction:column;align-items:center;justify-content:center;height:100%;gap:16px;color:var(--text-primary);text-align:center;background:transparent}.not-found-code{font-size:96px;font-weight:700;letter-spacing:-.04em;color:var(--accent);margin:0;line-height:1;text-shadow:0 0 40px var(--accent-glow)}.not-found-message{font-size:1.1rem;color:var(--text-secondary);margin:0;font-weight:400}.not-found-btn{margin-top:8px;padding:10px 28px;background-color:var(--accent);color:#fff;border:none;border-radius:20px;font-size:.875rem;font-weight:500;font-family:inherit;cursor:pointer;transition:background-color .2s,box-shadow .2s,transform .1s;box-shadow:0 0 20px var(--accent-glow)}.not-found-btn:hover{background-color:#1a94ff;box-shadow:0 0 32px var(--accent-glow)}.not-found-btn:active{transform:scale(.97)}.app{display:flex;flex-direction:column;height:100vh;overflow:hidden}main{flex:1;display:flex;flex-direction:column;overflow:hidden}.main-layout{display:flex;flex:1;overflow:hidden}