@import "https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap";:root{--bg-primary:#fff;--bg-secondary:#f8f9fa;--bg-sidebar:#f0f2f5;--bg-input:#fff;--bg-hover:#e8eaed;--bg-user-msg:#e8f0fe;--text-primary:#1a1a2e;--text-secondary:#5f6368;--text-muted:#9aa0a6;--accent:#1a73e8;--accent-hover:#1557b0;--border:#dadce0;--success:#34a853;--error:#ea4335;--warning:#fbbc04;--code-bg:#f6f8fa;--scrollbar:#dadce0;--scrollbar-hover:#9aa0a6;--shadow:#00000014;--msg-time:#9aa0a6}[data-theme=dark]{--bg-primary:#1e1f20;--bg-secondary:#131314;--bg-sidebar:#1e1f20;--bg-input:#282a2c;--bg-hover:#37393b;--bg-user-msg:#2d3036;--text-primary:#e3e3e3;--text-secondary:#9aa0a6;--text-muted:#5f6368;--accent:#8ab4f8;--accent-hover:#aecbfa;--border:#3c4043;--success:#81c995;--error:#f28b82;--warning:#fdd663;--code-bg:#1a1b26;--scrollbar:#3c4043;--scrollbar-hover:#5f6368;--shadow:#0000004d;--msg-time:#5f6368}*{box-sizing:border-box;margin:0;padding:0}body{background:var(--bg-secondary);color:var(--text-primary);height:100vh;font-family:Inter,-apple-system,BlinkMacSystemFont,sans-serif;transition:background .3s,color .3s;overflow:hidden}#root{height:100vh;display:flex}::-webkit-scrollbar{width:6px}::-webkit-scrollbar-track{background:0 0}::-webkit-scrollbar-thumb{background:var(--scrollbar);border-radius:3px}::-webkit-scrollbar-thumb:hover{background:var(--scrollbar-hover)}.login-container{background:linear-gradient(135deg,#667eea 0%,#764ba2 100%);justify-content:center;align-items:center;width:100%;height:100vh;display:flex}[data-theme=dark] .login-container{background:linear-gradient(135deg,#0f0f23 0%,#1a1a3e 50%,#0f0f23 100%)}.login-card{background:var(--bg-primary);border:1px solid var(--border);width:400px;box-shadow:0 8px 32px var(--shadow);border-radius:24px;padding:48px}.login-card h1{text-align:center;margin-bottom:8px;font-size:28px}.login-card p{color:var(--text-secondary);text-align:center;margin-bottom:32px;font-size:14px}.login-field{margin-bottom:20px}.login-field label{color:var(--text-secondary);margin-bottom:6px;font-size:13px;display:block}.login-field input{background:var(--bg-secondary);border:1px solid var(--border);width:100%;color:var(--text-primary);border-radius:12px;outline:none;padding:12px 16px;font-size:15px;transition:border-color .2s}.login-field input:focus{border-color:var(--accent)}.login-btn{background:var(--accent);color:#fff;cursor:pointer;border:none;border-radius:12px;width:100%;margin-top:8px;padding:12px;font-size:15px;font-weight:600;transition:background .2s}.login-btn:hover{background:var(--accent-hover)}.login-error{color:var(--error);text-align:center;margin-top:12px;font-size:13px}.sidebar{background:var(--bg-sidebar);border-right:1px solid var(--border);flex-direction:column;width:280px;min-width:280px;height:100vh;transition:background .3s;display:flex}.sidebar-header{align-items:center;gap:12px;padding:16px;display:flex}.sidebar-header h2{flex:1;font-size:18px;font-weight:600}.new-chat-btn{background:var(--accent);color:#fff;cursor:pointer;border:none;border-radius:12px;align-items:center;gap:8px;margin:0 12px 12px;padding:12px 16px;font-size:14px;font-weight:500;transition:background .2s;display:flex}.new-chat-btn:hover{background:var(--accent-hover)}.chat-list{flex:1;padding:0 8px;overflow-y:auto}.chat-item{cursor:pointer;color:var(--text-secondary);border-radius:12px;align-items:center;margin:2px 0;padding:12px 16px;font-size:14px;transition:background .15s;display:flex;position:relative}.chat-item:hover{background:var(--bg-hover);color:var(--text-primary)}.chat-item.active{background:var(--bg-hover);color:var(--text-primary);font-weight:500}.chat-item .delete-btn{opacity:0;color:var(--text-muted);cursor:pointer;background:0 0;border:none;font-size:16px;position:absolute;right:8px}.chat-item:hover .delete-btn{opacity:1}.sidebar-footer{border-top:1px solid var(--border);gap:8px;padding:12px 16px;display:flex}.settings-btn,.theme-toggle-btn{border:1px solid var(--border);color:var(--text-secondary);cursor:pointer;background:0 0;border-radius:10px;flex:1;justify-content:center;align-items:center;gap:8px;padding:10px 12px;font-size:13px;transition:all .15s;display:flex}.settings-btn:hover,.theme-toggle-btn:hover{background:var(--bg-hover);color:var(--text-primary)}.theme-toggle-btn{flex:0;padding:10px}.main-area{flex-direction:column;flex:1;height:100vh;display:flex}.chat-header{border-bottom:1px solid var(--border);background:var(--bg-primary);align-items:center;gap:12px;min-height:56px;padding:12px 24px;transition:background .3s;display:flex}.chat-header .model-select{background:var(--bg-secondary);border:1px solid var(--border);color:var(--text-primary);cursor:pointer;border-radius:8px;outline:none;padding:6px 12px;font-size:13px}.chat-header .model-select option{background:var(--bg-primary)}.messages-container{flex-direction:column;flex:1;padding:24px 0;display:flex;overflow-y:auto}.message-row{width:100%;max-width:900px;margin:0 auto;padding:8px 24px;display:flex}.message-row.user{justify-content:flex-end}.message-row.assistant{justify-content:flex-start}.message-bubble{word-wrap:break-word;border-radius:18px;max-width:85%;padding:14px 20px;font-size:15px;line-height:1.6;position:relative}.message-row.user .message-bubble{background:var(--bg-user-msg);border-bottom-right-radius:4px}.message-row.assistant .message-bubble{background:0 0;border-bottom-left-radius:4px}.message-meta{color:var(--msg-time);align-items:center;gap:8px;margin-top:6px;font-size:11px;display:flex}.message-meta .copy-msg-btn{color:var(--text-muted);cursor:pointer;background:0 0;border:none;border-radius:4px;align-items:center;gap:3px;padding:2px 6px;font-size:11px;transition:all .2s;display:flex}.message-meta .copy-msg-btn:hover{background:var(--bg-hover);color:var(--text-primary)}.message-meta .copy-msg-btn.copied{color:var(--success)}.message-bubble p{margin-bottom:10px}.message-bubble p:last-child{margin-bottom:0}.message-bubble ul,.message-bubble ol{margin:8px 0;padding-left:24px}.message-bubble li{margin-bottom:4px}.message-bubble strong{color:var(--accent);font-weight:600}.message-bubble a{color:var(--accent);text-decoration:none}.message-bubble a:hover{text-decoration:underline}.message-bubble blockquote{border-left:3px solid var(--accent);color:var(--text-secondary);margin:8px 0;padding-left:12px}.code-block-wrapper{background:var(--code-bg);border:1px solid var(--border);border-radius:12px;margin:12px 0;position:relative;overflow:hidden}.code-block-header{border-bottom:1px solid var(--border);background:#00000008;justify-content:space-between;align-items:center;padding:8px 16px;display:flex}[data-theme=dark] .code-block-header{background:#ffffff08}.code-block-lang{color:var(--text-muted);font-family:JetBrains Mono,monospace;font-size:12px}.copy-btn{border:1px solid var(--border);color:var(--text-secondary);cursor:pointer;background:0 0;border-radius:6px;padding:4px 10px;font-size:11px;transition:all .2s}.copy-btn:hover{background:var(--bg-hover);color:var(--text-primary)}.copy-btn.copied{color:var(--success);border-color:var(--success)}.code-block-wrapper pre{margin:0;padding:16px;font-family:JetBrains Mono,monospace;font-size:13px;line-height:1.5;overflow-x:auto}.code-block-wrapper code{color:#c9d1d9}[data-theme=light] .code-block-wrapper code{color:#24292e}.message-bubble code:not(.code-block-wrapper code){background:var(--bg-hover);color:var(--accent);border-radius:4px;padding:2px 6px;font-family:JetBrains Mono,monospace;font-size:13px}.typing-indicator{gap:4px;padding:8px 0;display:flex}.typing-dot{background:var(--text-muted);border-radius:50%;width:6px;height:6px;animation:1.4s infinite typing}.typing-dot:nth-child(2){animation-delay:.2s}.typing-dot:nth-child(3){animation-delay:.4s}@keyframes typing{0%,60%,to{opacity:.4;transform:translateY(0)}30%{opacity:1;transform:translateY(-4px)}}.welcome-screen{opacity:.6;flex-direction:column;flex:1;justify-content:center;align-items:center;gap:16px;display:flex}.welcome-screen h1{letter-spacing:-1px;font-size:42px;font-weight:300}.welcome-screen p{color:var(--text-secondary);font-size:15px}.chat-input-area{background:var(--bg-primary);justify-content:center;padding:12px 24px 24px;transition:background .3s;display:flex}.chat-input-wrapper{background:var(--bg-secondary);border:1px solid var(--border);border-radius:24px;align-items:flex-end;width:100%;max-width:800px;padding:4px 4px 4px 20px;transition:border-color .2s,box-shadow .2s;display:flex}.chat-input-wrapper:focus-within{border-color:var(--accent);box-shadow:0 0 0 2px #1a73e826}.chat-input-wrapper textarea{color:var(--text-primary);resize:none;background:0 0;border:none;outline:none;flex:1;max-height:200px;padding:10px 0;font-family:inherit;font-size:15px;line-height:1.5}.chat-input-wrapper textarea::placeholder{color:var(--text-muted)}.send-btn{background:var(--accent);color:#fff;cursor:pointer;border:none;border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;width:40px;height:40px;margin:2px;transition:background .2s;display:flex}.send-btn:hover{background:var(--accent-hover)}.send-btn:disabled{opacity:.4;cursor:not-allowed}.send-btn svg{width:18px;height:18px}.settings-overlay{z-index:100;background:#00000080;justify-content:center;align-items:center;display:flex;position:fixed;inset:0}.settings-panel{background:var(--bg-primary);border:1px solid var(--border);width:540px;max-height:80vh;box-shadow:0 16px 48px var(--shadow);border-radius:20px;padding:32px;overflow-y:auto}.settings-panel h2{margin-bottom:24px;font-size:22px}.settings-group{margin-bottom:24px}.settings-group label{color:var(--text-secondary);margin-bottom:6px;font-size:13px;font-weight:500;display:block}.settings-group input,.settings-group select{background:var(--bg-secondary);border:1px solid var(--border);width:100%;color:var(--text-primary);border-radius:10px;outline:none;padding:10px 14px;font-size:14px}.settings-group input:focus,.settings-group select:focus{border-color:var(--accent)}.model-tags{flex-wrap:wrap;gap:8px;margin-top:8px;display:flex}.model-tag{background:var(--bg-secondary);border:1px solid var(--border);color:var(--text-secondary);border-radius:20px;align-items:center;gap:6px;padding:6px 12px;font-size:13px;display:flex}.model-tag .remove-model{color:var(--text-muted);cursor:pointer;background:0 0;border:none;font-size:14px;line-height:1}.model-tag .remove-model:hover{color:var(--error)}.add-model-row{gap:8px;margin-top:8px;display:flex}.add-model-row input{flex:1}.add-model-btn{background:var(--bg-hover);border:1px solid var(--border);color:var(--text-primary);cursor:pointer;border-radius:10px;padding:10px 16px;font-size:14px}.add-model-btn:hover{background:var(--border)}.settings-actions{gap:12px;margin-top:24px;display:flex}.settings-actions button{cursor:pointer;border:none;border-radius:12px;flex:1;padding:12px;font-size:14px;font-weight:600;transition:all .2s}.save-btn{background:var(--accent);color:#fff}.save-btn:hover{background:var(--accent-hover)}.cancel-btn{background:var(--bg-hover);color:var(--text-primary);border:1px solid var(--border)!important}.cancel-btn:hover{background:var(--border)}.toast-msg{background:var(--success);color:#fff;z-index:200;border-radius:12px;padding:12px 20px;font-size:14px;font-weight:500;animation:.3s fadeIn;position:fixed;bottom:24px;right:24px}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}@media (width<=768px){.sidebar{display:none}.settings-panel{width:95%;margin:16px}}