:root{--bg:#0a0a0f;--bg2:#111118;--bg3:#1a1a24;--accent:#6366f1;--glow:rgba(99,102,241,.2);--green:#22c55e;--red:#ef4444;--warn:#f59e0b;--t1:#f0f0f5;--t2:#8b8fa3;--t3:#555770;--glass:rgba(255,255,255,.04);--border:rgba(255,255,255,.08);--r:12px;--tr:.2s ease}
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
html,body{height:100%;font-family:'Inter',system-ui,sans-serif;font-size:14px;line-height:1.6;background:var(--bg);color:var(--t1);overflow:hidden;-webkit-font-smoothing:antialiased}
#app{height:100%;display:flex}
.hidden{display:none!important}

/* Sidebar */
.sidebar{width:280px;height:100%;display:flex;flex-direction:column;background:var(--bg2);border-right:1px solid var(--border);flex-shrink:0;z-index:20}
.sidebar-header{display:flex;align-items:center;gap:10px;padding:16px;border-bottom:1px solid var(--border)}
.sidebar-logo{font-size:24px;background:linear-gradient(135deg,var(--accent),#a78bfa);-webkit-background-clip:text;-webkit-text-fill-color:transparent;filter:drop-shadow(0 0 8px var(--glow))}
.sidebar-title{font-weight:600;font-size:1rem;color:var(--t1);flex:1}
.btn-new-chat{width:34px;height:34px;display:flex;align-items:center;justify-content:center;background:var(--glass);border:1px solid var(--border);border-radius:8px;color:var(--t2);cursor:pointer;transition:all var(--tr)}
.btn-new-chat:hover{color:var(--accent);border-color:var(--accent)}
.sidebar-search{padding:8px 12px}
.sidebar-search input{width:100%;padding:8px 12px;background:var(--bg3);border:1px solid var(--border);border-radius:8px;color:var(--t1);font-size:.85rem;outline:none;font-family:inherit}
.sidebar-search input:focus{border-color:var(--accent)}
.sidebar-search input::placeholder{color:var(--t3)}

.chat-list{flex:1;overflow-y:auto;padding:4px 8px;scrollbar-width:thin;scrollbar-color:rgba(255,255,255,.06) transparent}
.chat-item{display:flex;align-items:center;gap:10px;padding:10px 12px;border-radius:10px;cursor:pointer;transition:all var(--tr);margin-bottom:2px;position:relative}
.chat-item:hover{background:var(--glass)}
.chat-item.active{background:rgba(99,102,241,.1);border:1px solid rgba(99,102,241,.2)}
.chat-item .chat-icon{width:32px;height:32px;border-radius:8px;background:var(--bg3);display:flex;align-items:center;justify-content:center;color:var(--t3);font-size:.85rem;flex-shrink:0}
.chat-item.active .chat-icon{background:rgba(99,102,241,.15);color:var(--accent)}
.chat-item .chat-info{flex:1;min-width:0}
.chat-item .chat-name{font-size:.85rem;font-weight:500;color:var(--t1);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.chat-item .chat-time{font-size:.7rem;color:var(--t3)}
.chat-item .chat-badge{width:8px;height:8px;border-radius:50%;background:var(--accent);flex-shrink:0}
.chat-item .chat-actions{position:absolute;right:8px;top:50%;transform:translateY(-50%);display:none;gap:4px}
.chat-item:hover .chat-actions{display:flex}
.chat-actions button{width:24px;height:24px;border:none;background:var(--bg3);border-radius:4px;color:var(--t3);cursor:pointer;display:flex;align-items:center;justify-content:center;font-size:.7rem}
.chat-actions button:hover{color:var(--red)}
.ag-badge{display:inline-block;padding:1px 5px;background:linear-gradient(135deg,rgba(99,102,241,.2),rgba(168,85,247,.2));border:1px solid rgba(99,102,241,.3);border-radius:4px;font-size:.6rem;font-weight:700;color:#a78bfa;letter-spacing:.5px;margin-right:4px;vertical-align:middle}
.chat-meta{font-size:.7rem;color:var(--t3)}

.sidebar-footer{padding:12px;border-top:1px solid var(--border)}
.status-bar{display:flex;align-items:center;gap:8px;margin-bottom:8px;padding:0 4px}
.status-indicator{width:8px;height:8px;border-radius:50%;background:var(--red)}
.status-indicator.online{background:var(--green);box-shadow:0 0 6px rgba(34,197,94,.5)}
.status-text{font-size:.75rem;color:var(--t3)}
.btn-settings{width:100%;padding:8px;display:flex;align-items:center;gap:8px;background:var(--glass);border:1px solid var(--border);border-radius:8px;color:var(--t2);font-size:.82rem;cursor:pointer;font-family:inherit;transition:all var(--tr)}
.btn-settings:hover{color:var(--t1);border-color:var(--accent)}

/* Main content */
.main-content{flex:1;display:flex;flex-direction:column;min-width:0;position:relative}
.mobile-header{display:none;padding:10px 16px;background:var(--bg2);border-bottom:1px solid var(--border);align-items:center;gap:12px}
.btn-hamburger{width:36px;height:36px;display:flex;align-items:center;justify-content:center;background:none;border:none;color:var(--t2);cursor:pointer}
.mobile-title{flex:1;font-weight:600;font-size:.95rem}
.mobile-status{width:8px;height:8px;border-radius:50%;background:var(--red)}
.mobile-status.online{background:var(--green)}
.sidebar-overlay{display:none;position:fixed;inset:0;background:rgba(0,0,0,.5);z-index:15}

/* Empty state */
.empty-state{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px;padding:32px}
.empty-glyph{font-size:64px;opacity:.3;animation:float 4s ease-in-out infinite}
@keyframes float{0%,100%{transform:translateY(0)}50%{transform:translateY(-8px)}}
.empty-state h2{font-size:1.4rem;font-weight:600;color:var(--t2)}
.empty-state p{color:var(--t3);font-size:.9rem}
.btn-start{padding:12px 28px;background:linear-gradient(135deg,var(--accent),#818cf8);border:none;border-radius:10px;color:#fff;font-size:.95rem;font-weight:600;cursor:pointer;transition:all var(--tr);font-family:inherit;margin-top:8px}
.btn-start:hover{transform:translateY(-1px);box-shadow:0 8px 24px var(--glow)}

/* Chat view */
.chat-view{flex:1;display:flex;flex-direction:column;overflow:hidden}
.chat-messages{flex:1;overflow-y:auto;padding:16px;display:flex;flex-direction:column;gap:10px;scrollbar-width:thin;scrollbar-color:rgba(255,255,255,.06) transparent}
.chat-messages::before{content:'';flex:1 1 auto}
.msg{max-width:85%;padding:12px 16px;border-radius:16px;animation:msgIn .2s ease;word-wrap:break-word;font-size:.9rem;line-height:1.65}
@keyframes msgIn{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}
.msg.user{align-self:flex-end;background:linear-gradient(135deg,rgba(99,102,241,.12),rgba(139,92,246,.08));border:1px solid rgba(99,102,241,.2);color:#e0e0ff}
.msg.assistant{align-self:flex-start;background:var(--bg3);border:1px solid var(--border)}
.msg.system{align-self:center;max-width:100%;background:rgba(245,158,11,.06);border:1px solid rgba(245,158,11,.15);color:var(--warn);font-size:.78rem;padding:6px 12px;border-radius:8px}
.msg pre{background:rgba(0,0,0,.4);padding:10px;border-radius:8px;overflow-x:auto;font-size:.8rem;margin:6px 0;border:1px solid var(--border)}
.msg code{font-family:'JetBrains Mono',monospace;background:rgba(0,0,0,.3);color:#c4b5fd;padding:1px 4px;border-radius:3px;font-size:.82em}
.msg pre code{background:none;padding:0;color:var(--t1)}
.msg a{color:#818cf8;text-decoration:none;border-bottom:1px solid rgba(129,140,248,.3)}
.msg a:hover{color:#a5b4fc}
.msg table{border-collapse:collapse;margin:6px 0;font-size:.78rem;width:100%}
.msg th,.msg td{border:1px solid var(--border);padding:4px 8px;text-align:left}
.msg th{background:rgba(255,255,255,.03);font-weight:600;color:var(--t2)}

/* Activity feed */
.activity-feed{padding:0 16px 8px}
.activity-phase{display:flex;align-items:center;gap:8px;padding:8px 14px;background:rgba(99,102,241,.06);border:1px solid rgba(99,102,241,.15);border-radius:10px;font-size:.8rem;color:var(--t2)}
.activity-dot{width:6px;height:6px;border-radius:50%;background:var(--accent);animation:pulse 1.5s infinite}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.3}}
.activity-text{flex:1}

/* Scroll bottom */
.scroll-bottom{position:absolute;bottom:140px;right:20px;width:36px;height:36px;border-radius:50%;background:var(--bg3);border:1px solid var(--border);color:var(--t2);cursor:pointer;display:flex;align-items:center;justify-content:center;z-index:5;transition:all var(--tr)}
.scroll-bottom:hover{background:var(--accent);color:#fff;border-color:var(--accent)}

/* Input area */
.input-area{padding:12px 16px;background:var(--bg2);border-top:1px solid var(--border)}
.input-row{display:flex;gap:8px;align-items:flex-end}
.btn-attach{width:38px;height:38px;flex-shrink:0;display:flex;align-items:center;justify-content:center;background:var(--glass);border:1px solid var(--border);border-radius:10px;color:var(--t3);cursor:pointer;transition:all var(--tr)}
.btn-attach:hover{color:var(--accent);border-color:var(--accent)}
#msg-input{flex:1;padding:9px 14px;background:var(--bg3);border:1px solid var(--border);border-radius:10px;color:var(--t1);font-size:.9rem;font-family:inherit;resize:none;outline:none;max-height:120px;min-height:38px;transition:border var(--tr)}
#msg-input:focus{border-color:var(--accent);box-shadow:0 0 0 2px var(--glow)}
#msg-input::placeholder{color:var(--t3)}
.btn-send{width:38px;height:38px;flex-shrink:0;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,var(--accent),#818cf8);border:none;border-radius:10px;color:#fff;cursor:pointer;transition:all var(--tr)}
.btn-send:hover{transform:scale(1.05);box-shadow:0 4px 16px var(--glow)}
.controls-row{display:flex;align-items:center;gap:8px;margin-top:8px}
#model-select{flex:1;padding:6px 10px;background:var(--bg3);border:1px solid var(--border);border-radius:8px;color:var(--t2);font-size:.78rem;font-family:inherit;outline:none;cursor:pointer}
#model-select:focus{border-color:var(--accent)}
.toggle-auto{display:flex;align-items:center;gap:6px;padding:6px 12px;background:rgba(34,197,94,.08);border:1px solid rgba(34,197,94,.2);border-radius:8px;color:var(--green);font-size:.78rem;cursor:pointer;white-space:nowrap}
.toggle-auto input{accent-color:var(--green)}
.btn-stop{padding:6px 14px;background:rgba(239,68,68,.08);border:1px solid rgba(239,68,68,.2);border-radius:8px;color:var(--red);font-size:.78rem;font-weight:600;cursor:pointer;font-family:inherit;transition:all var(--tr)}
.btn-stop:hover{border-color:var(--red);background:rgba(239,68,68,.15)}

/* Modal */
.modal{position:fixed;inset:0;z-index:50;display:flex;align-items:center;justify-content:center}
.modal-bg{position:absolute;inset:0;background:rgba(0,0,0,.6);backdrop-filter:blur(4px)}
.modal-card{position:relative;width:90%;max-width:400px;max-height:85vh;overflow-y:auto;background:var(--bg2);border:1px solid var(--border);border-radius:16px}
.modal-header{display:flex;justify-content:space-between;align-items:center;padding:16px 20px;border-bottom:1px solid var(--border)}
.modal-header h3{font-size:1rem;font-weight:600}
.modal-header button{width:30px;height:30px;display:flex;align-items:center;justify-content:center;background:var(--glass);border:1px solid var(--border);border-radius:6px;color:var(--t2);font-size:1.1rem;cursor:pointer}
.modal-body{padding:16px 20px}
.field{margin-bottom:14px}
.field label{display:block;font-size:.8rem;color:var(--t2);margin-bottom:4px;font-weight:500}
.field input{width:100%;padding:8px 12px;background:var(--bg3);border:1px solid var(--border);border-radius:8px;color:var(--t1);font-size:.85rem;outline:none;font-family:inherit;margin-bottom:4px}
.field input:focus{border-color:var(--accent)}
.btn-outline{padding:8px 16px;background:var(--glass);border:1px solid var(--border);border-radius:8px;color:var(--t2);font-size:.82rem;cursor:pointer;font-family:inherit}
.btn-outline:hover{border-color:var(--accent);color:var(--accent)}
.btn-danger{width:100%;padding:10px;background:rgba(239,68,68,.08);border:1px solid rgba(239,68,68,.2);border-radius:8px;color:var(--red);font-size:.82rem;cursor:pointer;font-family:inherit;margin-top:12px}
.version{text-align:center;font-size:.72rem;color:var(--t3);margin-top:14px}

/* Mobile responsive */
@media(max-width:768px){
  .sidebar{position:fixed;left:-280px;top:0;bottom:0;transition:left .25s ease;z-index:20}
  .sidebar.open{left:0}
  .sidebar-overlay.show{display:block}
  .mobile-header{display:flex}
  .msg{max-width:95%}
}