:root{--bg: #0a0a0c;--bg-sidebar: #050506;--bg-elevated: #17171b;--bg-elevated-2: #1e1e23;--bg-hover: #202024;--text: #f3f3f4;--text-muted: #8b8b93;--text-faint: #5c5c64;--border: #232328;--border-soft: #1b1b1f;--accent: #63a8f8;--accent-hover: #4f95ec;--accent-soft: rgba(99, 168, 248, .14);--accent-text: #0a0a0c;--danger: #f87171;--danger-hover: #ef4444;--shadow-lg: 0 12px 40px rgba(0, 0, 0, .5);--shadow-sm: 0 2px 10px rgba(0, 0, 0, .35)}*{box-sizing:border-box}html,body,#root{height:100%;margin:0}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;background:var(--bg);color:var(--text);-webkit-font-smoothing:antialiased}button{font-family:inherit;cursor:pointer;color:inherit}button:disabled{cursor:not-allowed;opacity:.45}input,textarea{font-family:inherit}::selection{background:var(--accent-soft)}*{scrollbar-width:thin;scrollbar-color:var(--border) transparent}*::-webkit-scrollbar{width:8px;height:8px}*::-webkit-scrollbar-thumb{background:var(--border);border-radius:8px}*::-webkit-scrollbar-track{background:transparent}.app-layout{display:flex;height:100dvh;position:relative;overflow:hidden;background:var(--bg)}.sidebar{width:268px;flex-shrink:0;background:var(--bg-sidebar);border-right:1px solid var(--border-soft);display:flex;flex-direction:column;padding:14px 12px;gap:14px}.sidebar-top{display:flex;align-items:center;gap:8px}.sidebar-close-btn{display:none;flex-shrink:0;width:36px;height:36px;align-items:center;justify-content:center;background:transparent;border:1px solid var(--border);border-radius:10px;color:var(--text-muted)}.sidebar-close-btn:hover{color:var(--text);border-color:var(--accent)}.sidebar-backdrop{display:none}.menu-toggle-btn{display:none;flex-shrink:0;width:34px;height:34px;align-items:center;justify-content:center;background:transparent;border:1px solid var(--border);border-radius:10px;color:var(--text-muted)}.menu-toggle-btn:hover{color:var(--text);border-color:var(--accent)}.new-chat-btn{flex:1;min-width:0;display:flex;align-items:center;gap:8px;padding:10px 14px;border-radius:12px;border:1px solid var(--border);background:var(--bg-elevated);color:var(--text);text-align:left;font-size:13.5px;font-weight:500;transition:border-color .15s ease,background .15s ease}.new-chat-btn:hover{border-color:var(--accent);background:var(--bg-elevated-2)}.chat-search-wrap{position:relative;display:flex;align-items:center}.chat-search-icon{position:absolute;left:11px;color:var(--text-faint);pointer-events:none}.chat-search{width:100%;padding:8px 10px 8px 32px;border-radius:10px;border:1px solid var(--border);background:var(--bg-elevated);color:var(--text);font-size:13px}.chat-search::placeholder{color:var(--text-faint)}.chat-list{flex:1;overflow-y:auto;display:flex;flex-direction:column;gap:1px;margin:0 -4px}.chat-list-empty{color:var(--text-faint);font-size:13px;padding:8px}.chat-item{display:flex;align-items:center;justify-content:space-between;gap:6px;padding:8px 10px;border-radius:10px;cursor:pointer;color:var(--text-muted);transition:background .12s ease,color .12s ease}.chat-item:hover{background:var(--bg-hover);color:var(--text)}.chat-item-active{background:var(--accent-soft);color:var(--text)}.chat-item-title{flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font-size:13px}.chat-item-actions{display:flex;gap:2px;flex-shrink:0;opacity:0;transition:opacity .15s ease}.chat-item:hover .chat-item-actions,.chat-item:focus-within .chat-item-actions{opacity:1}.chat-item-action{display:flex;align-items:center;justify-content:center;background:transparent;border:none;color:var(--text-faint);padding:5px;border-radius:7px}.chat-item-action:hover{background:var(--bg-elevated-2);color:var(--text)}.sidebar-footer{border-top:1px solid var(--border-soft);padding-top:12px;display:flex;align-items:center;justify-content:space-between;gap:8px}.sidebar-user{font-size:12px;color:var(--text-muted);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.logout-btn{flex-shrink:0;display:flex;align-items:center;justify-content:center;width:30px;height:30px;background:transparent;border:1px solid var(--border);color:var(--text-muted);border-radius:9px}.logout-btn:hover{color:var(--text);border-color:var(--accent)}.main-chat{flex:1;display:flex;flex-direction:column;min-width:0;min-height:0;background:var(--bg)}.chat-header{display:flex;align-items:center;gap:12px;padding:14px 20px;flex-shrink:0}.chat-header-title{font-size:14px;font-weight:600;color:var(--text);letter-spacing:.01em}.main-chat-body{flex:1;min-height:0;display:flex;flex-direction:column}.main-chat-body-empty{justify-content:center}.chat-messages{flex:1;overflow-y:auto;padding:32px 24px;display:flex;flex-direction:column;gap:26px}.main-chat-body-empty .chat-messages{flex:0 1 auto;overflow:visible;padding-bottom:0}.chat-messages-empty{align-items:center;justify-content:center;height:auto;color:var(--text-muted);gap:8px;text-align:center;padding:0 20px 8px}.chat-messages-empty h1{margin:0;font-size:26px;font-weight:600;color:var(--text);letter-spacing:-.01em}.chat-messages-hint{font-size:13.5px;max-width:420px;color:var(--text-muted)}.message-row{display:flex;flex-direction:column;gap:6px;max-width:780px;width:100%;margin:0 auto}.message-row-user{align-items:flex-end}.message-row-assistant{align-items:flex-start;width:100%}.message-bubble{max-width:100%;font-size:14.5px;line-height:1.65}.message-row-user .message-bubble{background:var(--bg-elevated);border:1px solid var(--border);color:var(--text);border-radius:18px 18px 4px;padding:11px 16px}.message-row-assistant .message-bubble{background:transparent;color:var(--text);padding:0;width:100%}.message-plain{margin:0;white-space:pre-wrap;word-break:break-word}.message-markdown{word-break:break-word}.message-markdown :first-child{margin-top:0}.message-markdown :last-child{margin-bottom:0}.message-markdown a{color:var(--accent)}.message-markdown pre{background:var(--bg-elevated);border:1px solid var(--border);border-radius:10px;padding:12px 14px;overflow-x:auto}.message-markdown code{font-family:SF Mono,Menlo,Consolas,monospace;font-size:13px}.message-markdown p code{background:var(--bg-elevated);border:1px solid var(--border);border-radius:5px;padding:1px 6px}.message-markdown blockquote{margin:0;padding:2px 14px;border-left:2px solid var(--accent);color:var(--text-muted)}.message-markdown table{border-collapse:collapse;width:100%;font-size:13px}.message-markdown th,.message-markdown td{border:1px solid var(--border);padding:7px 10px}.message-images{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:8px}.message-images img{max-width:240px;max-height:240px;border-radius:12px;border:1px solid var(--border);object-fit:cover;display:block}.message-sources{display:flex;flex-wrap:wrap;gap:6px;margin-top:14px}.message-source-chip{display:inline-flex;align-items:center;gap:5px;font-size:11.5px;color:var(--text-muted);background:var(--bg-elevated);border:1px solid var(--border);border-radius:999px;padding:4px 11px 4px 9px;max-width:220px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.copy-btn{display:inline-flex;align-items:center;gap:5px;background:transparent;border:none;color:var(--text-faint);font-size:12px;padding:4px 2px;margin-top:6px;align-self:flex-start}.copy-btn:hover{color:var(--accent)}.typing-indicator{display:inline-flex;gap:4px;padding:6px 0}.typing-indicator span{width:6px;height:6px;border-radius:50%;background:var(--accent);animation:typing-bounce 1.2s infinite ease-in-out}.typing-indicator span:nth-child(2){animation-delay:.15s}.typing-indicator span:nth-child(3){animation-delay:.3s}@keyframes typing-bounce{0%,60%,to{transform:translateY(0);opacity:.4}30%{transform:translateY(-4px);opacity:1}}.chat-composer-wrap{display:flex;flex-direction:column;gap:10px;padding:18px 24px 22px;flex-shrink:0;max-width:780px;width:100%;margin:0 auto}.chat-composer{display:flex;align-items:flex-end;gap:6px;background:var(--bg-elevated);border:1px solid var(--border);border-radius:22px;padding:8px 8px 8px 12px;box-shadow:var(--shadow-sm);transition:border-color .15s ease}.chat-composer:focus-within{border-color:var(--accent)}.composer-attachments{display:flex;flex-wrap:wrap;gap:8px}.composer-attachment{position:relative;width:64px;height:64px;flex-shrink:0}.composer-attachment img{width:100%;height:100%;object-fit:cover;border-radius:10px;border:1px solid var(--border);display:block}.composer-attachment-remove{position:absolute;top:-6px;right:-6px;width:20px;height:20px;border-radius:50%;border:1px solid var(--border);background:var(--bg-elevated-2);color:var(--text);display:flex;align-items:center;justify-content:center;padding:0}.composer-attach-error{margin:0;font-size:12px;color:var(--danger)}.composer-documents{display:flex;flex-wrap:wrap;gap:8px}.composer-document{display:flex;align-items:center;gap:7px;padding:6px 10px;border-radius:10px;border:1px solid var(--border);background:var(--bg-elevated);font-size:12px;max-width:260px}.composer-document-icon{flex-shrink:0;display:flex;color:var(--text-muted)}.composer-document-name{overflow:hidden;text-overflow:ellipsis;white-space:nowrap;color:var(--text)}.composer-document-status{flex-shrink:0;color:var(--text-muted)}.composer-document-failed .composer-document-status{color:var(--danger)}.composer-document-ready .composer-document-status{color:var(--accent)}.composer-document-remove{flex-shrink:0;display:flex;align-items:center;justify-content:center;background:transparent;border:none;color:var(--text-faint);padding:2px}.composer-document-remove:hover{color:var(--text)}.attach-btn{flex-shrink:0;display:flex;align-items:center;justify-content:center;width:36px;height:36px;background:transparent;border:none;border-radius:50%;color:var(--text-muted)}.attach-btn:not(:disabled):hover{background:var(--bg-hover);color:var(--accent)}.composer-input{flex:1;min-width:0;padding:8px 4px;border:none;background:transparent;color:var(--text);font-size:14.5px;font-family:inherit;resize:none;max-height:200px;overflow-y:auto;line-height:1.4}.composer-input:focus{outline:none}.composer-input::placeholder{color:var(--text-faint)}.send-btn{flex-shrink:0;display:flex;align-items:center;justify-content:center;width:36px;height:36px;background:var(--accent);color:var(--accent-text);border:none;border-radius:50%;transition:background .15s ease}.send-btn:not(:disabled):hover{background:var(--accent-hover)}.send-btn:disabled{background:var(--bg-elevated-2);color:var(--text-faint)}.stop-btn{background:var(--danger);color:#1a0a0a;opacity:1}.stop-btn:hover{background:var(--danger-hover)}.auth-page{height:100%;display:flex;align-items:center;justify-content:center;background:var(--bg)}.auth-card{width:340px;display:flex;flex-direction:column;gap:10px;padding:36px 32px;background:var(--bg-elevated);border:1px solid var(--border);border-radius:18px;box-shadow:var(--shadow-lg)}.auth-card h1{margin:0;font-size:22px;letter-spacing:-.01em}.auth-subtitle{margin:0 0 10px;color:var(--text-muted);font-size:14px}.auth-card label{font-size:12.5px;color:var(--text-muted);font-weight:500}.auth-card input{padding:10px 13px;border-radius:10px;border:1px solid var(--border);background:var(--bg-elevated-2);color:var(--text);font-size:14px}.auth-card input:focus{outline:none;border-color:var(--accent)}.auth-card button{margin-top:10px;padding:11px 12px;border-radius:10px;border:none;background:var(--accent);color:var(--accent-text);font-size:14px;font-weight:600}.auth-card button:not(:disabled):hover{background:var(--accent-hover)}.auth-error{color:var(--danger);font-size:13px;margin:0}.full-page-loading{height:100%;display:flex;align-items:center;justify-content:center;color:var(--text-muted);background:var(--bg)}@media (max-width: 1024px){.menu-toggle-btn,.sidebar-close-btn{display:flex}.sidebar{position:fixed;top:0;left:0;bottom:0;z-index:50;width:280px;max-width:85vw;border-right:1px solid var(--border);box-shadow:2px 0 24px #00000080;transform:translate(-100%);transition:transform .2s ease}.sidebar.sidebar-open{transform:translate(0)}.sidebar-backdrop{display:block;position:fixed;top:0;right:0;bottom:0;left:0;background:#0000008c;z-index:40;opacity:0;pointer-events:none;transition:opacity .2s ease}.sidebar-backdrop.visible{opacity:1;pointer-events:auto}.chat-item-actions{opacity:1}}@media (min-width: 1025px){.sidebar-close-btn{display:none!important}}@media (max-width: 640px){.chat-header{padding:12px 14px}.chat-messages{padding:20px 16px}.chat-messages-hint{font-size:12px}.chat-composer-wrap{padding:12px 12px 16px}.composer-input,.auth-card input{font-size:16px}.auth-page{padding:16px}.auth-card{width:100%;max-width:360px;padding:24px}}