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4px;background:var(--bd-bg);font-size:14px;line-height:1.5}.chat-message.own .chat-bubble{background:var(--bd-blue);color:#fff;border-radius:16px 16px 4px}.chat-bubble-name{font-size:12px;font-weight:600;color:var(--bd-blue);margin-bottom:2px}.chat-bubble-time{font-size:10px;color:var(--bd-text-muted);margin-top:4px}.chat-message.own .chat-bubble-time{color:#fff9}.chat-input-bar{display:flex;align-items:center;gap:8px;padding:12px 16px;border-top:1px solid var(--border-color);background:var(--bd-bg)}.chat-input-bar input{flex:1;padding:10px 14px;border:1.5px solid var(--border-color);border-radius:var(--border-radius-full);background:#fff;outline:none;font-size:14px}.chat-input-bar input:focus{border-color:var(--bd-blue)}.file-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(180px,1fr));gap:16px}.file-card{text-align:center;padding:20px 16px;cursor:pointer}.file-card-icon{width:48px;height:48px;margin:0 auto 12px;color:var(--bd-blue)}.file-card-name{font-size:13px;font-weight:600;margin-bottom:4px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.file-card-size{font-size:11px;color:var(--bd-text-muted)}.detail-header{display:flex;align-items:center;gap:16px;margin-bottom:24px}.detail-back{display:flex;align-items:center;gap:6px;color:var(--bd-text-secondary);font-size:14px;font-weight:500;cursor:pointer;padding:6px 12px;border-radius:var(--border-radius-sm);transition:all var(--transition-fast);border:none;background:transparent}.detail-back:hover{background:var(--bd-bg);color:var(--bd-blue)}@media(max-width:1200px){.dashboard-grid,.kanban-board{grid-template-columns:repeat(2,1fr)}}@media(max-width:768px){.dashboard-grid,.dashboard-charts{grid-template-columns:1fr}.kanban-board{grid-template-columns:1fr;gap:12px}.project-grid{grid-template-columns:1fr}.page-header{flex-direction:column;align-items:stretch}.page-header-actions{justify-content:stretch}.page-header-actions .btn{flex:1}.login-card{padding:32px 24px}.chat-message{max-width:90%}}