*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}:root{--bg-primary: #0f0f14;--bg-secondary: #16161e;--bg-sidebar: #111118;--bg-input: #1e1e28;--bg-user-msg: #2563eb;--bg-assistant-msg: #1e1e28;--text-primary: #e4e4e7;--text-secondary: #a1a1aa;--text-muted: #71717a;--border: #27272a;--accent: #3b82f6;--accent-hover: #2563eb;--radius: 12px;--sidebar-width: 280px;--transition: .2s ease}html,body{height:100%;font-family:Inter,Noto Sans Arabic,system-ui,sans-serif;background:var(--bg-primary);color:var(--text-primary);-webkit-font-smoothing:antialiased}#root{height:100%}.app{display:flex;height:100%;overflow:hidden}.main-content{flex:1;display:flex;flex-direction:column;margin-left:var(--sidebar-width);transition:margin-left var(--transition);min-width:0}.main-content.sidebar-collapsed{margin-left:0}.chat-container{display:flex;flex-direction:column;height:100%;max-width:850px;width:100%;margin:0 auto;padding:0 16px}.sidebar{position:fixed;left:0;top:0;bottom:0;width:var(--sidebar-width);background:var(--bg-sidebar);border-right:1px solid var(--border);display:flex;flex-direction:column;z-index:100;transition:transform var(--transition)}.sidebar.closed{transform:translate(-100%)}.sidebar-header{display:flex;align-items:center;justify-content:space-between;padding:20px 16px 12px}.sidebar-logo{display:flex;align-items:center;gap:8px;font-size:1.15rem;font-weight:700;color:var(--text-primary)}.logo-icon{font-size:1.3rem}.sidebar-toggle{background:none;border:none;color:var(--text-muted);font-size:1.1rem;cursor:pointer;padding:4px 8px;border-radius:6px;transition:background var(--transition)}.sidebar-toggle:hover{background:var(--bg-input);color:var(--text-primary)}.new-chat-btn{margin:8px 16px 16px;padding:10px 14px;background:var(--accent);color:#fff;border:none;border-radius:8px;font-size:.9rem;font-weight:600;cursor:pointer;display:flex;align-items:center;gap:6px;transition:background var(--transition)}.new-chat-btn:hover{background:var(--accent-hover)}.new-chat-btn span{font-size:1.2rem;line-height:1}.conversation-list{flex:1;overflow-y:auto;padding:0 8px}.conversation-item{display:flex;align-items:center;gap:8px;padding:10px 12px;border-radius:8px;cursor:pointer;color:var(--text-secondary);font-size:.875rem;transition:background var(--transition);position:relative}.conversation-item:hover{background:var(--bg-input)}.conversation-item.active{background:var(--bg-input);color:var(--text-primary)}.conv-icon{flex-shrink:0;font-size:.9rem}.conv-title{flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.conv-delete{opacity:0;background:none;border:none;color:var(--text-muted);cursor:pointer;font-size:.8rem;padding:2px 4px;border-radius:4px;transition:opacity var(--transition)}.conversation-item:hover .conv-delete{opacity:1}.conv-delete:hover{color:#ef4444}.sidebar-footer{padding:16px;border-top:1px solid var(--border);text-align:center}.sidebar-footer p{font-size:.75rem;color:var(--text-muted)}.chat-header{display:flex;align-items:center;gap:12px;padding:16px 0;border-bottom:1px solid var(--border)}.menu-btn{background:none;border:1px solid var(--border);color:var(--text-secondary);font-size:1.2rem;cursor:pointer;padding:6px 10px;border-radius:8px;transition:background var(--transition)}.menu-btn:hover{background:var(--bg-input)}.chat-header h1{font-size:1.1rem;font-weight:600}.header-subtitle{font-size:.85rem;color:var(--text-muted);font-family:Noto Sans Arabic,sans-serif}.chat-window{flex:1;display:flex;flex-direction:column;min-height:0}.messages-area{flex:1;overflow-y:auto;padding:24px 0;scroll-behavior:smooth}.welcome{display:flex;flex-direction:column;align-items:center;text-align:center;padding:60px 20px 30px;gap:8px}.welcome-icon{font-size:3rem;margin-bottom:8px}.welcome h2{font-size:1.6rem;font-weight:700}.welcome-ar{font-family:Noto Sans Arabic,sans-serif;font-size:1.1rem;color:var(--text-secondary);direction:rtl}.welcome-desc{color:var(--text-secondary);max-width:500px;line-height:1.6;margin-top:8px;font-size:.95rem}.suggestions{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:28px;max-width:560px;width:100%}.suggestion-card{background:var(--bg-secondary);border:1px solid var(--border);border-radius:var(--radius);padding:16px;text-align:left;cursor:default;transition:border-color var(--transition)}.suggestion-card:hover{border-color:var(--accent)}.suggestion-card span{font-size:1.3rem;display:block;margin-bottom:6px}.suggestion-card p{font-size:.85rem;color:var(--text-secondary);line-height:1.5}.message{display:flex;gap:12px;padding:16px 0;align-items:flex-start}.user-message{flex-direction:row-reverse}.message-avatar{width:32px;height:32px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:1rem;flex-shrink:0;background:var(--bg-input)}.user-message .message-avatar{background:var(--bg-user-msg)}.message-content{max-width:75%;padding:12px 16px;border-radius:var(--radius);line-height:1.7;font-size:.95rem;word-break:break-word}.user-message .message-content{background:var(--bg-user-msg);color:#fff;border-bottom-right-radius:4px}.assistant-message .message-content{background:var(--bg-assistant-msg);color:var(--text-primary);border:1px solid var(--border);border-bottom-left-radius:4px}.typing-indicator{display:flex;gap:5px;padding:16px 0 16px 44px}.typing-indicator span{width:8px;height:8px;background:var(--text-muted);border-radius:50%;animation:bounce 1.4s infinite ease-in-out}.typing-indicator span:nth-child(2){animation-delay:.16s}.typing-indicator span:nth-child(3){animation-delay:.32s}@keyframes bounce{0%,80%,to{transform:scale(.6);opacity:.4}40%{transform:scale(1);opacity:1}}.input-bar{display:flex;align-items:flex-end;gap:10px;padding:16px 0 24px;border-top:1px solid var(--border)}.input-field{flex:1;resize:none;border:1px solid var(--border);background:var(--bg-input);color:var(--text-primary);font-family:inherit;font-size:.95rem;padding:12px 16px;border-radius:var(--radius);outline:none;transition:border-color var(--transition);line-height:1.5;max-height:150px;overflow-y:auto}.input-field::placeholder{color:var(--text-muted)}.input-field:focus{border-color:var(--accent)}.send-btn{width:44px;height:44px;border-radius:50%;background:var(--accent);border:none;color:#fff;font-size:1.2rem;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:background var(--transition),opacity var(--transition);flex-shrink:0}.send-btn:hover:not(:disabled){background:var(--accent-hover)}.send-btn:disabled{opacity:.4;cursor:not-allowed}.send-loading{font-size:1rem}::-webkit-scrollbar{width:6px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:var(--border);border-radius:3px}::-webkit-scrollbar-thumb:hover{background:var(--text-muted)}.login-page{display:flex;align-items:center;justify-content:center;min-height:100%;padding:20px;background:var(--bg-primary)}.login-card{width:100%;max-width:400px;background:var(--bg-secondary);border:1px solid var(--border);border-radius:16px;padding:40px 32px 32px}.login-header{text-align:center;margin-bottom:32px}.login-logo{font-size:3rem;display:block;margin-bottom:12px}.login-header h1{font-size:1.5rem;font-weight:700;margin-bottom:4px}.login-subtitle{font-family:Noto Sans Arabic,sans-serif;font-size:.95rem;color:var(--text-muted);direction:rtl}.login-form{display:flex;flex-direction:column;gap:18px}.form-group{display:flex;flex-direction:column;gap:6px}.form-group label{font-size:.85rem;font-weight:500;color:var(--text-secondary)}.form-group input{padding:11px 14px;background:var(--bg-input);border:1px solid var(--border);border-radius:8px;color:var(--text-primary);font-family:inherit;font-size:.95rem;outline:none;transition:border-color var(--transition)}.form-group input::placeholder{color:var(--text-muted)}.form-group input:focus{border-color:var(--accent)}.login-error{background:#ef44441f;color:#f87171;padding:10px 14px;border-radius:8px;font-size:.875rem;text-align:center}.login-btn{padding:12px;background:var(--accent);color:#fff;border:none;border-radius:8px;font-size:.95rem;font-weight:600;cursor:pointer;transition:background var(--transition),opacity var(--transition);margin-top:4px}.login-btn:hover:not(:disabled){background:var(--accent-hover)}.login-btn:disabled{opacity:.5;cursor:not-allowed}.login-footer-text{text-align:center;font-size:.75rem;color:var(--text-muted);margin-top:24px}.logout-btn{width:100%;padding:8px;background:transparent;border:1px solid var(--border);color:var(--text-secondary);border-radius:6px;font-size:.8rem;font-family:inherit;cursor:pointer;margin-bottom:10px;transition:background var(--transition),color var(--transition)}.logout-btn:hover{background:var(--bg-input);color:var(--text-primary)}@media(max-width:768px){.sidebar{width:260px}.main-content{margin-left:0}.sidebar.open~.main-content{margin-left:0}.suggestions{grid-template-columns:1fr}.message-content{max-width:85%}}