* { margin:0; padding:0; box-sizing:border-box; }
body { font-family: system-ui, sans-serif; background:#0a0a0a; color:#e0e0e0; height:100vh; overflow:hidden; }
#app { display:flex; height:100vh; background:#111; }

#sidebar { width:280px; min-width:280px; background:#0d0d0d; border-right:1px solid #2a2a2a; display:flex; flex-direction:column; }
.sidebar-header { padding:16px 20px; border-bottom:1px solid #2a2a2a; display:flex; justify-content:space-between; align-items:center; }
.sidebar-header h2 { font-size:18px; font-weight:700; background:linear-gradient(135deg,#6366f1,#a855f7); -webkit-background-clip:text; -webkit-text-fill-color:transparent; }
.status { font-size:12px; padding:2px 12px; border-radius:20px; background:#1a3a1a; color:#4ade80; -webkit-text-fill-color:#4ade80; }
.sidebar-tabs { display:flex; border-bottom:1px solid #2a2a2a; }
.sidebar-tabs .tab { flex:1; padding:10px; background:transparent; border:none; color:#888; font-size:13px; cursor:pointer; }
.sidebar-tabs .tab.active { color:#fff; border-bottom:2px solid #6366f1; }
.sidebar-content { flex:1; overflow-y:auto; padding:8px 12px; }
.tab-content { display:none; }
.tab-content.active { display:block; }

.chat-item { display:flex; align-items:center; padding:10px 12px; border-radius:10px; cursor:pointer; }
.chat-item:hover { background:#1e1e1e; }
.chat-avatar { width:40px; height:40px; border-radius:50%; background:#2a2a2a; display:flex; align-items:center; justify-content:center; font-size:20px; margin-right:12px; }
.chat-name { font-weight:600; font-size:14px; }
.chat-preview { font-size:13px; color:#888; overflow:hidden; text-overflow:ellipsis; white-space:nowrap; }

.projects-header, .memory-header { padding:8px 0 12px; display:flex; justify-content:flex-end; }
.btn-primary { background:linear-gradient(135deg,#6366f1,#a855f7); border:none; color:#fff; padding:6px 16px; border-radius:20px; font-size:13px; font-weight:600; cursor:pointer; }
.btn-primary:hover { opacity:0.9; transform:scale(1.02); }
.project-item, .memory-item { padding:10px 12px; border-radius:8px; background:#141414; margin-bottom:6px; display:flex; justify-content:space-between; align-items:center; cursor:pointer; }
.project-item:hover, .memory-item:hover { background:#1e1e1e; }
.project-name, .memory-name { font-size:14px; font-weight:500; }
.project-badge, .memory-badge { font-size:11px; padding:2px 10px; border-radius:12px; background:#2a2a2a; color:#888; }

.sidebar-footer { padding:12px 20px; border-top:1px solid #2a2a2a; font-size:12px; color:#666; }

#main { flex:1; display:flex; flex-direction:column; background:#111; }
#chat-header { padding:14px 24px; border-bottom:1px solid #2a2a2a; display:flex; justify-content:space-between; align-items:center; background:#0d0d0d; }
.chat-title { display:flex; align-items:center; gap:12px; font-weight:600; font-size:16px; }
.chat-title .avatar { font-size:28px; }
#clear-chat { background:transparent; border:none; color:#666; font-size:18px; cursor:pointer; padding:4px 8px; border-radius:6px; }
#clear-chat:hover { background:#2a2a2a; color:#ccc; }

#messages { flex:1; overflow-y:auto; padding:20px 24px; display:flex; flex-direction:column; gap:8px; }
.message { display:flex; animation:fadeIn .3s ease; }
.message.user { justify-content:flex-end; }
.message.user .message-content { background:linear-gradient(135deg,#6366f1,#8b5cf6); color:#fff; border-radius:18px 18px 4px 18px; }
.message.assistant .message-content { background:#1e1e1e; border-radius:18px 18px 18px 4px; }
.message.system .message-content { background:#141414; border-radius:12px; text-align:center; color:#888; font-size:13px; width:100%; justify-content:center; }
.message-content { max-width:75%; padding:10px 16px; border-radius:18px; font-size:14px; line-height:1.6; white-space:pre-wrap; word-break:break-word; }
.message-content code { background:#2a2a2a; padding:2px 8px; border-radius:4px; font-size:13px; }
.message-content pre { background:#0a0a0a; padding:12px; border-radius:8px; overflow-x:auto; margin:6px 0; border:1px solid #2a2a2a; }
.message.tool-result .message-content { background:#141414; border:1px solid #2a2a2a; font-size:13px; color:#a0a0a0; }

#input-area { padding:12px 24px 20px; border-top:1px solid #2a2a2a; background:#0d0d0d; }
#input-context { display:flex; align-items:center; gap:8px; margin-bottom:8px; font-size:13px; color:#888; }
#input-context select { background:#1a1a1a; border:1px solid #2a2a2a; color:#e0e0e0; padding:4px 12px; border-radius:6px; font-size:13px; outline:none; cursor:pointer; }
#input-context select:focus { border-color:#6366f1; }
.input-row { display:flex; gap:10px; align-items:flex-end; }
#message-input { flex:1; background:#1a1a1a; border:1px solid #2a2a2a; border-radius:12px; padding:10px 16px; color:#e0e0e0; font-size:14px; resize:none; outline:none; font-family:inherit; max-height:120px; min-height:42px; line-height:1.5; }
#message-input:focus { border-color:#6366f1; }
#send-btn { width:44px; height:44px; border-radius:50%; background:linear-gradient(135deg,#6366f1,#a855f7); border:none; color:#fff; font-size:20px; cursor:pointer; display:flex; align-items:center; justify-content:center; flex-shrink:0; }
#send-btn:hover { transform:scale(1.05); }
#send-btn:disabled { opacity:0.5; cursor:not-allowed; }
.input-hint { font-size:11px; color:#555; margin-top:6px; text-align:center; }

.modal { position:fixed; top:0; left:0; width:100%; height:100%; background:rgba(0,0,0,0.7); display:flex; align-items:center; justify-content:center; z-index:1000; backdrop-filter:blur(4px); }
.modal.hidden { display:none; }
.modal-content { background:#1a1a1a; padding:30px 36px; border-radius:16px; min-width:360px; border:1px solid #2a2a2a; position:relative; }
.modal-close { position:absolute; top:12px; right:18px; font-size:24px; color:#666; cursor:pointer; }
.modal-close:hover { color:#ccc; }
.modal-content h3 { margin-bottom:16px; font-size:20px; }
.modal-content input { width:100%; padding:10px 14px; background:#0a0a0a; border:1px solid #2a2a2a; border-radius:8px; color:#e0e0e0; font-size:14px; outline:none; margin-bottom:16px; }
.modal-content input:focus { border-color:#6366f1; }
.modal-content .btn-primary { width:100%; padding:10px; font-size:15px; }

@keyframes fadeIn { from { opacity:0; transform:translateY(8px); } to { opacity:1; transform:translateY(0); } }
::-webkit-scrollbar { width:6px; }
::-webkit-scrollbar-track { background:transparent; }
::-webkit-scrollbar-thumb { background:#333; border-radius:10px; }
::-webkit-scrollbar-thumb:hover { background:#444; }

@media (max-width:768px) {
  #sidebar { width:0; min-width:0; overflow:hidden; }
  #sidebar.open { width:280px; min-width:280px; }
  .message-content { max-width:90%; }
}