.chat-area{flex:1 1;overflow-y:auto;padding:32px 0;display:flex;flex-direction:column;gap:24px}.message-row{display:flex;gap:12px;padding:0 28px;animation:fadeUp .25s ease forwards;max-width:780px;width:100%;margin:0 auto}.msg-avatar{width:30px;height:30px;border-radius:8px;display:grid;place-items:center;font-size:.72rem;font-weight:700;flex-shrink:0;margin-top:2px}.msg-avatar.aim{background:var(--accent);color:#fff}.msg-avatar.user{background:var(--bg-3);color:var(--text-2);border:1px solid var(--border-2)}.msg-body{flex:1 1;min-width:0}.msg-sender{font-size:.78rem;font-weight:600;margin-bottom:5px;color:var(--text-2);display:flex;align-items:center;gap:8px}.msg-time{font-weight:400;color:var(--text-3);font-size:.72rem}.msg-content{font-size:var(--chat-font-size,.9rem);line-height:1.7;color:var(--text-1);white-space:pre-wrap}.msg-content p{margin-bottom:8px}.msg-content p:last-child{margin-bottom:0}.msg-content code{font-family:var(--mono);font-size:.82em;background:var(--bg-3);padding:2px 6px;border-radius:4px;color:var(--accent)}.msg-actions{display:flex;gap:4px;margin-top:8px;opacity:0;transition:opacity var(--transition)}.message-row:hover .msg-actions{opacity:1}.msg-action-btn{padding:4px 8px;border-radius:var(--radius-sm);font-size:.72rem;color:var(--text-3);background:transparent;transition:background var(--transition),color var(--transition);display:flex;align-items:center;gap:4px}.msg-action-btn:hover{background:var(--bg-3);color:var(--text-2)}.typing-dots{display:flex;gap:4px;align-items:center;padding:4px 0}.typing-dots span{width:6px;height:6px;border-radius:50%;background:var(--text-3);animation:pulse 1.2s ease infinite}.typing-dots span:nth-child(2){animation-delay:.2s}.typing-dots span:nth-child(3){animation-delay:.4s}.chat-welcome{flex:1 1;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:40px 24px;gap:12px;animation:fadeUp .4s ease forwards}.welcome-icon{width:52px;height:52px;background:var(--accent-dim);border:1.5px solid var(--accent-border);border-radius:14px;display:grid;place-items:center;font-size:1.3rem;margin-bottom:4px}.welcome-title{font-size:1.3rem;font-weight:600;letter-spacing:-.02em}.welcome-sub{font-size:.875rem;color:var(--text-3);max-width:360px;line-height:1.6}.suggestion-chips{display:flex;flex-wrap:wrap;gap:8px;justify-content:center;margin-top:8px;max-width:520px}.chip{padding:8px 14px;background:var(--bg-2);border:1px solid var(--border-2);border-radius:99px;font-size:.82rem;color:var(--text-2);cursor:pointer;transition:all var(--transition)}.chip:hover{background:var(--accent-dim);border-color:var(--accent-border);color:var(--accent)}.input-bar{padding:14px 20px 18px;border-top:1px solid var(--border);background:var(--bg)}.input-wrap{max-width:780px;margin:0 auto;position:relative}.chat-input{width:100%;padding:12px 50px 12px 16px;background:var(--bg-2);border:1px solid var(--border-2);border-radius:var(--radius-lg);color:var(--text-1);font-family:var(--font);font-size:.9rem;line-height:1.5;resize:none;outline:none;max-height:160px;transition:border-color var(--transition),box-shadow var(--transition)}.chat-input:focus{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-dim)}.chat-input::placeholder{color:var(--text-3)}.send-btn{position:absolute;right:10px;bottom:10px;width:32px;height:32px;border-radius:var(--radius-sm);background:var(--accent);color:#fff;display:grid;place-items:center;transition:opacity var(--transition),transform var(--transition)}.send-btn:hover{opacity:.85;transform:scale(1.05)}.send-btn:disabled{opacity:.35;transform:none}.input-meta{display:flex;align-items:center;justify-content:space-between;max-width:780px;margin:6px auto 0;padding:0 2px}.input-meta-left{display:flex;gap:4px}.input-hint{font-size:.72rem;color:var(--text-3)}.attach-btn{padding:4px 8px;border-radius:var(--radius-sm);font-size:.75rem;color:var(--text-3);display:flex;align-items:center;gap:5px;transition:background var(--transition),color var(--transition)}.attach-btn:hover{background:var(--bg-3);color:var(--text-2)}.plus-menu-wrap{position:relative}.plus-btn{width:26px;height:26px;border-radius:50%;border:1px solid var(--border-2);color:var(--text-3);display:grid;place-items:center;transition:background var(--transition),color var(--transition),border-color var(--transition)}.plus-btn:hover{background:var(--bg-3);color:var(--text-1);border-color:var(--text-3)}.plus-menu{position:absolute;bottom:calc(100% + 8px);left:0;width:260px;background:var(--bg);border:1px solid var(--border-2);border-radius:var(--radius-md);box-shadow:var(--shadow-md);padding:4px;z-index:60;animation:fadeUp .15s ease forwards}.plus-menu-item{width:100%;display:flex;align-items:flex-start;gap:10px;padding:8px 10px;border-radius:var(--radius-sm);text-align:left;transition:background var(--transition)}.plus-menu-item:hover{background:var(--bg-3)}.plus-menu-item.active{background:var(--accent-dim)}.plus-menu-emoji{font-size:1rem;line-height:1.3;flex-shrink:0}.plus-menu-text{display:flex;flex-direction:column;gap:1px;min-width:0}.plus-menu-label{font-size:.84rem;font-weight:500;color:var(--text-1)}.plus-menu-desc{font-size:.72rem;color:var(--text-3)}.mode-chip{background:var(--accent-dim);border-color:var(--accent-border);color:var(--accent)}.model-select{padding:4px 10px;background:var(--bg-2);border:1px solid var(--border);border-radius:99px;font-size:.75rem;color:var(--text-2);cursor:pointer;font-family:var(--font);outline:none}.share-wrap{position:relative}.share-popover{position:absolute;top:calc(100% + 8px);right:0;background:var(--bg);border:1px solid var(--border-2);border-radius:var(--radius-md);box-shadow:var(--shadow-md);padding:4px;min-width:200px;z-index:50;animation:fadeUp .15s ease forwards}.share-popover-item{width:100%;display:flex;align-items:center;gap:8px;padding:9px 11px;font-size:.82rem;color:var(--text-1);border-radius:var(--radius-sm);transition:background var(--transition);text-align:left}.share-popover-item:hover{background:var(--bg-3)}.attachment-chips{display:flex;flex-wrap:wrap;gap:6px;padding:10px 14px 0}.attachment-chip{display:flex;align-items:center;gap:6px;padding:5px 8px 5px 10px;background:var(--bg-3);border:1px solid var(--border-2);border-radius:99px;font-size:.76rem;color:var(--text-2);max-width:220px}.attachment-chip-name{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.attachment-chip-remove{width:16px;height:16px;border-radius:50%;display:grid;place-items:center;color:var(--text-3);flex-shrink:0;transition:background var(--transition),color var(--transition)}.attachment-chip-remove:hover{background:var(--border-2);color:var(--text-1)}.msg-attachments{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:8px}.msg-attachment{display:flex;align-items:center;gap:6px;padding:5px 10px;background:var(--bg-3);border:1px solid var(--border-2);border-radius:var(--radius-md);font-size:.76rem;color:var(--text-2)}.code-block{background:var(--bg-2);border:1px solid var(--border);border-radius:var(--radius-md);overflow:hidden;margin:6px 0}.code-block-header{display:flex;align-items:center;justify-content:space-between;padding:7px 12px;border-bottom:1px solid var(--border);background:var(--bg-3)}.code-block-lang{font-family:var(--mono);text-transform:lowercase}.code-block-copy,.code-block-lang{font-size:.72rem;color:var(--text-3)}.code-block-copy{padding:2px 8px;border-radius:var(--radius-sm);transition:background var(--transition),color var(--transition)}.code-block-copy:hover{background:var(--bg);color:var(--text-1)}.code-block-body{padding:12px 14px;overflow-x:auto;font-family:var(--mono);font-size:.8rem;line-height:1.6;color:var(--text-1)}.code-file-card{display:flex;align-items:center;gap:12px;width:100%;max-width:360px;padding:12px 14px;background:var(--bg-2);border:1px solid var(--border-2);border-radius:var(--radius-lg);margin:6px 0;transition:border-color var(--transition),background var(--transition);text-align:left}.code-file-card:hover{border-color:var(--accent-border);background:var(--accent-dim)}.code-file-icon{width:34px;height:34px;border-radius:8px;background:var(--accent-dim);color:var(--accent);display:grid;place-items:center;flex-shrink:0}.code-file-info{flex:1 1;min-width:0}.code-file-name{font-size:.84rem;font-weight:600;font-family:var(--mono);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.code-file-meta{font-size:.74rem;color:var(--text-3);margin-top:1px}.code-file-open{color:var(--text-3);flex-shrink:0}.chat-split{min-height:0}.chat-column,.chat-split{flex:1 1;display:flex;overflow:hidden}.chat-column{min-width:0;flex-direction:column}.code-side-panel{width:42%;min-width:320px;max-width:640px;flex-shrink:0;border-left:1px solid var(--border);background:var(--bg-2);display:flex;flex-direction:column;overflow:hidden;animation:slideInPanel .2s ease forwards}@keyframes slideInPanel{0%{transform:translateX(16px);opacity:0}to{transform:translateX(0);opacity:1}}.code-side-header{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:12px 14px;border-bottom:1px solid var(--border);background:var(--bg);flex-shrink:0}.code-side-title{display:flex;align-items:center;gap:9px;min-width:0;color:var(--text-2)}.code-side-filename{font-size:.84rem;font-weight:600;font-family:var(--mono);color:var(--text-1);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:260px}.code-side-lang{font-size:.72rem;color:var(--text-3);margin-top:1px}.code-side-actions{display:flex;align-items:center;gap:2px;flex-shrink:0}.code-side-actions .icon-btn{width:30px;height:30px}.code-side-body{flex:1 1;overflow:auto;padding:16px 18px;font-family:var(--mono);font-size:.82rem;line-height:1.65;color:var(--text-1)}@media (max-width:900px){.code-side-panel{position:fixed;inset:0;width:100%;max-width:none;z-index:250}}