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.2s;background:var(--bg-app);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.ds-upload-input:hover{border-color:var(--accent);background:var(--accent-light);color:var(--accent)}.ds-empty{display:flex;flex-direction:column;align-items:center;gap:10px;padding:28px 16px;text-align:center;color:var(--text-3);font-size:.82rem;background:var(--bg-app);border-radius:var(--r-lg);border:1px dashed var(--border);line-height:1.55}.ds-file-list{display:flex;flex-direction:column;gap:10px}.ds-file-entry{display:flex;align-items:flex-start;gap:13px;padding:14px 16px;border:1px solid var(--border);border-radius:var(--r-lg);background:var(--bg-surface);transition:border-color .15s,box-shadow .15s}.ds-file-entry:hover{border-color:var(--border-focus);box-shadow:var(--shadow-sm)}.ds-file-entry--active{border-color:var(--accent-border);background:var(--accent-light);box-shadow:0 0 0 2px #1d4ed814}.ds-file-entry__icon{width:36px;height:36px;background:var(--accent-light);border-radius:var(--r-md);display:flex;align-items:center;justify-content:center;flex-shrink:0;color:var(--accent)}.ds-file-entry--active .ds-file-entry__icon{background:#1d4ed81f}.ds-file-entry__info{flex:1;min-width:0;display:flex;flex-direction:column;gap:4px}.ds-file-entry__name{font-size:.88rem;font-weight:600;color:var(--text);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.ds-file-entry__meta{display:flex;gap:10px;font-size:.74rem;color:var(--text-3)}.ds-file-entry__meta span:before{content:"·";margin-right:10px}.ds-file-entry__meta span:first-child:before{content:"";margin-right:0}.ds-file-entry__sheets{display:flex;flex-wrap:wrap;gap:5px;margin-top:4px}.ds-sheet-chip{display:inline-block;padding:2px 7px;background:var(--bg-stripe);border:1px solid var(--border);border-radius:var(--r-full);font-size:.7rem;color:var(--text-2)}.ds-sheet-chip--more{color:var(--text-3)}.ds-file-entry--active .ds-sheet-chip{background:#fff9}.ds-file-entry__right{display:flex;flex-direction:column;align-items:flex-end;gap:4px;flex-shrink:0}@media (max-width: 960px){.workspace{flex-direction:column;overflow:auto}.history-panel{width:100%;max-height:240px}.chat-area{min-height:480px}.admin-layout{grid-template-columns:1fr}.message{max-width:96%}.ds-upload-row{flex-wrap:wrap}}@media (max-width: 680px){:root{--sidebar-width: 0px}.sidebar{display:none}.content{padding:16px}.topbar{padding:0 16px}}