:root{color-scheme:dark;font-family:ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,sans-serif;line-height:1.5;--bg-primary: #212121;--bg-secondary: #171717;--bg-sidebar: #171717;--bg-hover: #2f2f2f;--bg-active: #2f2f2f;--bg-input: #303030;--bg-user-msg: #303030;--bg-code: #1a1a1a;--border: rgba(255, 255, 255, .08);--border-strong: rgba(255, 255, 255, .15);--text-primary: #ececec;--text-secondary: #b4b4b4;--text-muted: #8e8e8e;--accent: #10a37f;--accent-hover: #1a7f64}*{box-sizing:border-box;margin:0;padding:0}html,body,#root{height:100%;background:var(--bg-primary);color:var(--text-primary)}.app-layout{display:flex;height:100vh;overflow:hidden}.sidebar{width:260px;min-width:260px;background:var(--bg-sidebar);display:flex;flex-direction:column;border-right:1px solid var(--border);transition:width .2s,min-width .2s,opacity .2s;z-index:200}.sidebar.closed{width:0;min-width:0;overflow:hidden;opacity:0;border:none}.sidebar-header{display:flex;align-items:center;justify-content:space-between;padding:12px;gap:8px}.new-chat-btn{flex:1;display:flex;align-items:center;gap:8px;padding:10px 14px;background:transparent;border:1px solid var(--border);border-radius:8px;color:var(--text-primary);font-size:.875rem;cursor:pointer;transition:background .15s}.new-chat-btn:hover{background:var(--bg-hover)}.icon-btn{display:flex;align-items:center;justify-content:center;width:36px;height:36px;background:transparent;border:none;border-radius:8px;color:var(--text-secondary);cursor:pointer;transition:background .15s,color .15s}.icon-btn:hover{background:var(--bg-hover);color:var(--text-primary)}.sidebar-close{flex-shrink:0}.conversation-list{flex:1;overflow-y:auto;padding:4px 8px}.conversation-item{display:flex;align-items:center;gap:10px;padding:10px 12px;border-radius:8px;cursor:pointer;color:var(--text-secondary);font-size:.875rem;transition:background .15s,color .15s;position:relative}.conversation-item:hover{background:var(--bg-hover);color:var(--text-primary)}.conversation-item.active{background:var(--bg-active);color:var(--text-primary)}.conversation-title{flex:1;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.delete-btn{display:none;align-items:center;justify-content:center;background:transparent;border:none;color:var(--text-muted);cursor:pointer;padding:4px;border-radius:4px;transition:color .15s}.conversation-item:hover .delete-btn{display:flex}.delete-btn:hover{color:#ef4444}.sidebar-footer{padding:8px;border-top:1px solid var(--border)}.clear-btn{display:flex;align-items:center;gap:8px;width:100%;padding:10px 12px;background:transparent;border:none;border-radius:8px;color:var(--text-muted);font-size:.8rem;cursor:pointer;transition:background .15s,color .15s}.clear-btn:hover{background:var(--bg-hover);color:#ef4444}.sidebar-overlay{display:none}.chat-main{flex:1;display:flex;flex-direction:column;min-width:0}.chat-header{display:flex;align-items:center;gap:12px;padding:12px 16px;border-bottom:1px solid var(--border);background:var(--bg-primary)}.chat-title{font-size:.95rem;font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;flex:1}.model-badge{font-size:.7rem;padding:3px 8px;background:var(--bg-hover);border:1px solid var(--border);border-radius:6px;color:var(--text-muted);white-space:nowrap}.messages-container{flex:1;overflow-y:auto;display:flex;flex-direction:column}.messages-list{max-width:768px;width:100%;margin:0 auto;padding:24px;display:flex;flex-direction:column;gap:24px}.message{display:flex;gap:16px;align-items:flex-start}.message-avatar{width:32px;height:32px;border-radius:50%;display:flex;align-items:center;justify-content:center;flex-shrink:0;font-size:.8rem;font-weight:700}.avatar-user{width:32px;height:32px;border-radius:50%;background:#7c6ef0;color:#fff;display:flex;align-items:center;justify-content:center;font-size:.8rem;font-weight:700}.avatar-assistant{width:32px;height:32px;border-radius:50%;background:var(--accent);color:#fff;display:flex;align-items:center;justify-content:center}.message-body{flex:1;min-width:0}.message-header{display:flex;align-items:center;gap:8px;margin-bottom:4px}.message-role{font-size:.8rem;font-weight:600;color:var(--text-secondary)}.message-time{font-size:.7rem;color:var(--text-muted)}.message-content{font-size:.9375rem;line-height:1.7;color:var(--text-primary)}.message-content.user-content{background:var(--bg-user-msg);padding:12px 16px;border-radius:16px;white-space:pre-wrap;word-break:break-word;display:inline-block;max-width:100%}.message-actions{display:flex;gap:4px;margin-top:8px;opacity:0;transition:opacity .15s}.message:hover .message-actions{opacity:1}.action-btn{display:flex;align-items:center;gap:4px;padding:4px 8px;background:transparent;border:1px solid var(--border);border-radius:6px;color:var(--text-muted);font-size:.75rem;cursor:pointer;transition:background .15s,color .15s,border-color .15s}.action-btn:hover{background:var(--bg-hover);color:var(--text-primary);border-color:var(--border-strong)}.empty-state{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:20px;padding:32px;text-align:center}.logo-icon{color:var(--accent);opacity:.7}.empty-state h2{font-size:1.75rem;font-weight:600;color:var(--text-primary)}.suggestions-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px;margin-top:16px;max-width:480px;width:100%}.suggestion-card{display:flex;flex-direction:column;align-items:flex-start;gap:4px;padding:16px;background:transparent;border:1px solid var(--border);border-radius:14px;color:var(--text-primary);font-size:.875rem;cursor:pointer;transition:background .15s,border-color .15s;text-align:left}.suggestion-card:hover{background:var(--bg-hover);border-color:var(--border-strong)}.suggestion-icon{font-size:1.25rem;margin-bottom:4px}.suggestion-text{font-weight:600;font-size:.85rem}.suggestion-sub{font-size:.8rem;color:var(--text-muted)}.typing-indicator{display:flex;gap:4px;padding:8px 0}.typing-indicator span{width:8px;height:8px;background:var(--text-muted);border-radius:50%;animation:bounce 1.4s ease-in-out infinite}.typing-indicator span:nth-child(2){animation-delay:.2s}.typing-indicator span:nth-child(3){animation-delay:.4s}@keyframes bounce{0%,80%,to{transform:translateY(0);opacity:.4}40%{transform:translateY(-8px);opacity:1}}.markdown-body{line-height:1.7}.markdown-body p{margin-bottom:12px}.markdown-body p:last-child{margin-bottom:0}.markdown-body h1,.markdown-body h2,.markdown-body h3,.markdown-body h4,.markdown-body h5,.markdown-body h6{font-weight:700;margin:20px 0 8px;line-height:1.3}.markdown-body h1{font-size:1.5rem}.markdown-body h2{font-size:1.25rem}.markdown-body h3{font-size:1.1rem}.markdown-body strong{font-weight:700;color:var(--text-primary)}.markdown-body em{font-style:italic}.markdown-body a{color:var(--accent);text-decoration:none}.markdown-body a:hover{text-decoration:underline}.markdown-body ul,.markdown-body ol{margin:8px 0 12px;padding-left:24px}.markdown-body li{margin-bottom:4px}.markdown-body blockquote{border-left:3px solid var(--accent);padding:4px 16px;margin:12px 0;color:var(--text-secondary);background:#ffffff05;border-radius:0 8px 8px 0}.markdown-body hr{border:none;border-top:1px solid var(--border);margin:16px 0}.markdown-body .inline-code{background:var(--bg-code);padding:2px 6px;border-radius:4px;font-family:ui-monospace,SFMono-Regular,Menlo,Monaco,monospace;font-size:.85em;border:1px solid var(--border)}.markdown-body .code-block{margin:12px 0;border-radius:10px;overflow:hidden;border:1px solid var(--border);background:var(--bg-code)}.markdown-body .code-header{display:flex;justify-content:space-between;align-items:center;padding:8px 12px;background:#ffffff08;font-size:.75rem;color:var(--text-muted);border-bottom:1px solid var(--border)}.copy-code-btn{background:transparent;border:1px solid var(--border);border-radius:4px;color:var(--text-muted);font-size:.7rem;padding:2px 8px;cursor:pointer;transition:background .15s,color .15s}.copy-code-btn:hover{background:var(--bg-hover);color:var(--text-primary)}.markdown-body pre{padding:14px 16px;overflow-x:auto;margin:0}.markdown-body pre code{font-family:ui-monospace,SFMono-Regular,Menlo,Monaco,monospace;font-size:.85rem;line-height:1.6;background:none;border:none;padding:0}.input-area{padding:16px 24px 20px;background:var(--bg-primary);max-width:768px;width:100%;margin:0 auto}.input-wrapper{display:flex;align-items:flex-end;gap:8px;background:var(--bg-input);border:1px solid var(--border);border-radius:16px;padding:8px 8px 8px 16px;transition:border-color .15s,box-shadow .15s}.input-wrapper:focus-within{border-color:#fff3;box-shadow:0 0 0 1px #ffffff0d}.input-wrapper textarea{flex:1;background:transparent;border:none;color:var(--text-primary);font-size:.9375rem;font-family:inherit;line-height:1.5;resize:none;outline:none;max-height:200px;padding:6px 0}.input-wrapper textarea::placeholder{color:var(--text-muted)}.input-actions{display:flex;align-items:center;gap:4px}.send-btn{width:36px;height:36px;border-radius:10px;background:var(--accent);border:none;color:#fff;display:flex;align-items:center;justify-content:center;cursor:pointer;transition:background .15s,opacity .15s;flex-shrink:0}.send-btn:hover:not(:disabled){background:var(--accent-hover)}.send-btn:disabled{opacity:.3;cursor:not-allowed}.stop-btn{width:36px;height:36px;border-radius:10px;background:var(--text-muted);border:none;color:var(--bg-primary);display:flex;align-items:center;justify-content:center;cursor:pointer;transition:background .15s;flex-shrink:0}.stop-btn:hover{background:var(--text-secondary)}.input-hint{text-align:center;font-size:.75rem;color:var(--text-muted);margin-top:8px}::-webkit-scrollbar{width:6px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:#ffffff1a;border-radius:3px}::-webkit-scrollbar-thumb:hover{background:#fff3}@media(max-width:768px){.sidebar{position:fixed;left:0;top:0;bottom:0;z-index:200;box-shadow:4px 0 24px #0006}.sidebar.closed{display:none}.sidebar-overlay{display:block;position:fixed;top:0;right:0;bottom:0;left:0;background:#00000080;z-index:150}.messages-list{padding:12px 16px}.input-area{padding:12px 16px 16px}.suggestions-grid{grid-template-columns:1fr}.empty-state h2{font-size:1.25rem}.message-actions{opacity:1}}