:root{--bg-color: #0f172a;--chat-bg: #1e293b;--primary-color: #8b5cf6;--primary-hover: #7c3aed;--text-color: #ffffff;--text-secondary: #cbd5e1;--bubble-user: linear-gradient(135deg, #8b5cf6 0%, #6366f1 100%);--bubble-bot: #334155;--border-color: #334155;--shadow-color: rgba(0, 0, 0, .3);--font-family: "Inter", system-ui, Avenir, Helvetica, Arial, sans-serif}body{margin:0;padding:0;font-family:var(--font-family);background-color:var(--bg-color);color:var(--text-color);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;height:100vh;overflow:hidden}#root{height:100%;display:flex;flex-direction:column}::-webkit-scrollbar{width:8px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:var(--border-color);border-radius:4px}::-webkit-scrollbar-thumb:hover{background:var(--text-secondary)}.app{display:flex;height:100vh;background-color:#343541;color:#fff;overflow:hidden}.sidebar-wrapper{width:260px;transition:width .3s ease,transform .3s ease;overflow:hidden;flex-shrink:0}.sidebar-wrapper.closed{width:0;transform:translate(-100%)}.main-content{flex:1;display:flex;flex-direction:column;height:100%;position:relative;min-width:0}.top-bar{display:flex;align-items:center;padding:.5rem;position:absolute;top:0;left:0;z-index:10;width:100%}.toggle-sidebar-btn{background:transparent;border:none;color:#ffffffb3;cursor:pointer;padding:.5rem;border-radius:.375rem;display:flex;align-items:center;justify-content:center;margin-right:1rem;transition:background-color .2s}.toggle-sidebar-btn:hover{background-color:#ffffff1a;color:#fff}.toggle-sidebar-btn svg{width:24px;height:24px}.chat-container{flex:1;display:flex;flex-direction:column;overflow:hidden;position:relative;max-width:800px;margin:0 auto;width:100%;padding-top:40px}.welcome-message{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:2rem;text-align:center}.welcome-message h1{font-size:3rem;font-weight:700;background:linear-gradient(135deg,var(--primary-color),#6366f1);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;margin-bottom:1rem}.welcome-message p{font-size:1.25rem;color:var(--text-secondary)}@media(max-width:768px){.app{position:relative}.sidebar-wrapper{position:absolute;top:0;left:0;height:100%;z-index:100;width:280px;box-shadow:2px 0 8px #00000080}.sidebar-wrapper.closed{transform:translate(-100%);width:280px}.main-content{width:100%}.chat-container{padding-top:60px;padding-left:.5rem;padding-right:.5rem;padding-bottom:.5rem;justify-content:space-around;gap:1rem}.top-bar{background:var(--bg-color);border-bottom:1px solid var(--border-color)}.welcome-message{flex:none;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:0 1rem;text-align:center}.welcome-message h1{font-size:1.75rem;margin-bottom:.5rem}.welcome-message p{font-size:.95rem;margin-bottom:0}}.chat-window{flex:1;overflow-y:auto;padding:2rem;background:transparent}.message{margin-bottom:1.5rem;animation:fadeIn .3s ease-in}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.message.user{text-align:right}.message-header{font-size:.85rem;font-weight:600;margin-bottom:.5rem;color:var(--text-secondary)}.message.user .message-header{color:#a78bfa}.message-content{display:inline-block;width:fit-content;max-width:70%;padding:1rem 1.5rem;border-radius:1rem;background:var(--bubble-bot);color:var(--text-color);box-shadow:0 4px 6px #0000001a;text-align:left;word-wrap:break-word;overflow-wrap:break-word;border:1px solid rgba(255,255,255,.1)}.message.user .message-content{background:var(--bubble-user);color:#fff;border:none}.message-content p{margin:.5rem 0}.message-content p:first-child{margin-top:0}.message-content p:last-child{margin-bottom:0}.message-content ul,.message-content ol{margin:.5rem 0;padding-left:1.5rem}.message-content li{margin:.25rem 0}.message-content strong{font-weight:700;color:#e2e8f0}.message-content code{background:#0003;padding:.2rem .4rem;border-radius:.25rem;font-family:monospace;font-size:.9em}.message-content pre{background:#0000004d;padding:1rem;border-radius:.5rem;overflow-x:auto;margin:.5rem 0}.message-content pre code{background:transparent;padding:0;color:#e2e8f0}.chat-input{background:transparent;padding:2rem;width:100%;max-width:800px;margin:0 auto;box-sizing:border-box}.input-container{position:relative;display:flex;align-items:flex-end;background-color:#40414f;border-radius:.75rem;box-shadow:0 0 15px #0000001a;border:1px solid rgba(32,33,35,.5);padding:.75rem}.input-container:focus-within{border-color:#fff3;box-shadow:0 0 15px #0003}.input-container textarea{flex:1;max-height:200px;background:transparent;border:none;padding:.5rem .5rem .5rem .75rem;color:#fff;font-family:inherit;font-size:1rem;line-height:1.5;resize:none;outline:none;overflow-y:hidden}.input-container textarea::placeholder{color:#ffffff80}.send-btn{background:transparent;border:none;color:#ffffff80;padding:.5rem;border-radius:.375rem;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all .2s;margin-bottom:.125rem}.send-btn:hover:not(:disabled){background-color:#19c37d;color:#fff}.send-btn:disabled{opacity:.4;cursor:default}.send-btn svg{width:16px;height:16px}@media(max-width:768px){.chat-input,.input-container{padding:.5rem}}.sidebar{width:260px;background-color:#202123;color:#fff;display:flex;flex-direction:column;height:100%;padding:10px;box-sizing:border-box;border-right:1px solid #444}.new-chat-btn{background-color:transparent;border:1px solid #565869;color:#fff;padding:10px;border-radius:5px;cursor:pointer;text-align:left;margin-bottom:20px;transition:background-color .2s}.new-chat-btn:hover{background-color:#2b2c2f}.session-list{flex:1;overflow-y:auto}.session-item{padding:10px;border-radius:5px;cursor:pointer;display:flex;justify-content:space-between;align-items:center;margin-bottom:5px;color:#ececf1;transition:background-color .2s}.session-item:hover{background-color:#2a2b32}.session-item.active{background-color:#343541}.session-title{white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:180px;font-size:.9rem}.delete-btn{background:none;border:none;color:#8e8ea0;cursor:pointer;font-size:1.2rem;padding:0 5px}.delete-btn:hover{color:#fff}.header{padding:1rem 1.5rem;background:transparent}.header-content{display:flex;align-items:center;justify-content:center}.header-content span{font-size:1.5rem;font-weight:700;background:linear-gradient(135deg,#667eea,#764ba2);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}