*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}:root{--bg: #212121;--bg2: #2f2f2f;--bg3: #3f3f3f;--sidebar: #171717;--border: #444;--text: #ececec;--text2: #aaa;--primary: #10a37f;--primary-h: #0d8a6b;--danger: #e53e3e;--radius: 10px;--sidebar-w: 260px}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;background:var(--bg);color:var(--text);height:100vh;overflow:hidden}a{color:var(--primary);text-decoration:none}a:hover{text-decoration:underline}button{cursor:pointer;border:none;background:none;color:inherit;font:inherit}.app-layout{display:flex;height:100vh;position:relative}.main-area{flex:1;display:flex;flex-direction:column;overflow:hidden;transition:margin-left .25s}.sidebar{width:var(--sidebar-w);background:var(--sidebar);display:flex;flex-direction:column;height:100vh;flex-shrink:0;transition:transform .25s;border-right:1px solid var(--border)}.sidebar.closed{transform:translate(calc(-1 * var(--sidebar-w)));position:absolute;z-index:10}.sidebar.open{transform:translate(0)}.sidebar-toggle{position:fixed;left:0;top:50%;transform:translateY(-50%);background:var(--bg2);border:1px solid var(--border);color:var(--text);border-radius:0 6px 6px 0;padding:8px 4px;z-index:20;transition:left .25s}.sidebar.open~.sidebar-toggle{left:var(--sidebar-w)}.sidebar-header{display:flex;align-items:center;justify-content:space-between;padding:16px 12px;border-bottom:1px solid var(--border)}.sidebar-logo{font-size:15px;font-weight:700}.chat-list{flex:1;overflow-y:auto;padding:8px}.chat-list::-webkit-scrollbar{width:4px}.chat-list::-webkit-scrollbar-thumb{background:var(--bg3);border-radius:4px}.no-chats{color:var(--text2);font-size:13px;text-align:center;padding:24px 8px}.chat-item{display:flex;align-items:center;gap:8px;padding:8px 10px;border-radius:var(--radius);cursor:pointer;font-size:13px;color:var(--text2);transition:background .15s;position:relative}.chat-item:hover,.chat-item.active{background:var(--bg2);color:var(--text)}.chat-icon{flex-shrink:0;opacity:.5}.chat-title{flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.chat-actions{display:none;gap:2px}.chat-item:hover .chat-actions{display:flex}.rename-input{flex:1;background:var(--bg3);border:1px solid var(--primary);color:var(--text);border-radius:4px;padding:2px 6px;font-size:13px;outline:none}.sidebar-footer{padding:12px;border-top:1px solid var(--border);display:flex;align-items:center;justify-content:space-between}.user-info{display:flex;align-items:center;gap:8px;flex:1}.avatar{width:28px;height:28px;border-radius:50%;background:var(--primary);display:flex;align-items:center;justify-content:center;font-size:12px;font-weight:700}.username{font-size:13px;font-weight:600}.auth-btns{display:flex;gap:8px;width:100%}.auth-btn{flex:1;display:flex;align-items:center;justify-content:center;gap:6px;padding:8px;border-radius:var(--radius);font-size:13px;background:var(--bg2);border:1px solid var(--border);transition:background .15s}.auth-btn:hover{background:var(--bg3)}.auth-btn.primary{background:var(--primary);border-color:var(--primary);color:#fff}.auth-btn.primary:hover{background:var(--primary-h)}.guest-banner{background:#2a2a1f;border-bottom:1px solid #555;padding:8px 16px;font-size:13px;color:#d4c87a;text-align:center}.guest-banner .link{color:var(--primary);cursor:pointer;font-weight:600}.chat-window{flex:1;overflow-y:auto;padding:24px 0;scroll-behavior:smooth}.chat-window::-webkit-scrollbar{width:6px}.chat-window::-webkit-scrollbar-thumb{background:var(--bg3);border-radius:4px}.empty-state{display:flex;flex-direction:column;align-items:center;justify-content:center;height:100%;gap:12px;color:var(--text2)}.empty-icon{font-size:48px}.empty-state h2{font-size:24px;color:var(--text)}.empty-state p{font-size:15px}.hint-pills{display:flex;gap:8px;flex-wrap:wrap;justify-content:center;margin-top:8px}.hint-pill{background:var(--bg2);border:1px solid var(--border);color:var(--text2);border-radius:20px;padding:8px 14px;font:inherit;font-size:13px;cursor:pointer;touch-action:manipulation;transition:background .15s,border-color .15s,color .15s}.hint-pill:hover,.hint-pill:focus-visible{background:var(--bg3);border-color:var(--primary);color:var(--text);outline:none}.hint-pill:disabled{cursor:not-allowed;opacity:.5}.message-row{display:flex;gap:12px;padding:8px 16px;max-width:860px;margin:0 auto;width:100%}.message-row.user{flex-direction:row-reverse}.msg-avatar{width:32px;height:32px;border-radius:50%;flex-shrink:0;display:flex;align-items:center;justify-content:center;font-size:16px;background:var(--bg2)}.user-av{background:var(--primary);color:#fff;font-size:13px;font-weight:700}.bubble{max-width:75%;padding:12px 16px;border-radius:12px;font-size:15px;line-height:1.6}.user-bubble{background:var(--primary);color:#fff;border-bottom-right-radius:4px}.assistant-bubble{background:var(--bg2);border-bottom-left-radius:4px}.error-bubble{background:#3d1c1c!important;color:#fc8181!important}.task-badge{display:flex;align-items:center;gap:6px;font-size:11px;color:var(--text2);margin-bottom:6px}.wiki-badge{background:var(--bg3);padding:2px 6px;border-radius:4px}.bubble-text{white-space:pre-wrap;word-break:break-word}.cursor{display:inline-block;animation:blink .8s steps(1) infinite}@keyframes blink{0%,to{opacity:1}50%{opacity:0}}.input-bar{padding:12px 16px 20px}.input-wrap{max-width:760px;margin:0 auto;display:flex;align-items:flex-end;gap:8px;background:var(--bg2);border:1px solid var(--border);border-radius:14px;padding:10px 12px}.chat-input{flex:1;background:none;border:none;outline:none;color:var(--text);font-size:15px;resize:none;max-height:160px;font-family:inherit;line-height:1.5}.chat-input::placeholder{color:var(--text2)}.send-btn{background:var(--primary);color:#fff;border-radius:8px;width:32px;height:32px;display:flex;align-items:center;justify-content:center;transition:background .15s;flex-shrink:0}.send-btn:hover:not(.disabled){background:var(--primary-h)}.send-btn.disabled{background:var(--bg3);color:var(--text2);cursor:not-allowed}.input-hint{text-align:center;font-size:12px;color:var(--text2);margin-top:6px}.auth-page{min-height:100vh;display:flex;align-items:center;justify-content:center;background:var(--bg);padding:16px}.auth-card{background:var(--bg2);border:1px solid var(--border);border-radius:16px;padding:40px 36px;width:100%;max-width:400px}.auth-card.centered{text-align:center}.auth-logo{font-size:40px;text-align:center;margin-bottom:8px}.auth-card h1{font-size:22px;text-align:center;margin-bottom:4px}.auth-sub{color:var(--text2);font-size:14px;text-align:center;margin-bottom:24px}.auth-card label{display:block;font-size:13px;font-weight:600;margin-bottom:6px;margin-top:16px}.auth-card input{width:100%;background:var(--bg);border:1px solid var(--border);color:var(--text);border-radius:var(--radius);padding:10px 12px;font-size:14px;outline:none;transition:border .15s}.auth-card input:focus{border-color:var(--primary)}.auth-extra{display:flex;justify-content:flex-end;margin-top:6px;font-size:13px}.auth-submit{display:block;width:100%;margin-top:20px;padding:12px;background:var(--primary);color:#fff;border-radius:var(--radius);font-size:15px;font-weight:600;transition:background .15s;text-align:center}.auth-submit:hover{background:var(--primary-h)}.auth-submit:disabled{background:var(--bg3);color:var(--text2);cursor:not-allowed}.btn-link{text-decoration:none;cursor:pointer}.auth-switch{text-align:center;font-size:13px;color:var(--text2);margin-top:16px}.alert{padding:10px 14px;border-radius:var(--radius);font-size:13px;margin-bottom:8px}.alert.error{background:#3d1c1c;color:#fc8181;border:1px solid #e53e3e44}.alert.success{background:#1a3a2f;color:#68d391;border:1px solid #10a37f44}.big-icon{font-size:48px;margin-bottom:12px}.icon-btn{display:flex;align-items:center;padding:5px;border-radius:6px;color:var(--text2);transition:background .15s,color .15s}.icon-btn:hover{background:var(--bg3);color:var(--text)}.icon-btn.sm{padding:3px}.icon-btn.danger:hover{color:var(--danger)}.loading-screen{display:flex;align-items:center;justify-content:center;height:100vh;font-size:18px;color:var(--text2)}.spinner{width:32px;height:32px;border:3px solid var(--bg3);border-top-color:var(--primary);border-radius:50%;animation:spin .7s linear infinite;margin:0 auto 16px}@keyframes spin{to{transform:rotate(360deg)}}