:root{--bg: #f4f5f7;--surface: #ffffff;--border: #dfe2e7;--border-strong: #c8cdd4;--text: #1c2128;--text-muted: #6b7280;--accent: #2563eb;--accent-hover: #1d4ed8;--header-bg: #1c2128;--header-text: #e8eaed;--radius: 6px;--shadow-sm: 0 1px 2px rgba(16, 24, 40, .06);--shadow-md: 0 4px 12px rgba(16, 24, 40, .1)}*{box-sizing:border-box}body{margin:0;font-family:Segoe UI,system-ui,-apple-system,sans-serif;font-size:14px;color:var(--text);background:var(--bg)}.page{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:24px}.card{max-width:480px;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow-sm);padding:32px;text-align:center}.card h1{margin:0 0 12px;font-size:18px}.card p{margin:0 0 8px;color:var(--text-muted);line-height:1.5}.muted{font-size:12px}.viewer{display:flex;flex-direction:column;min-height:100vh}.viewer-bar{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:10px 16px;background:var(--header-bg);color:var(--header-text)}.viewer-name{font-weight:600;font-size:13px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.viewer-content{flex:1;overflow:auto;padding:24px}.btn{display:inline-flex;align-items:center;gap:6px;padding:6px 12px;border:1px solid var(--accent);border-radius:var(--radius);background:var(--accent);color:#fff;cursor:pointer;font-weight:500;font-size:13px;text-decoration:none}.btn:hover{background:var(--accent-hover)}.empty-state{text-align:center;color:var(--text-muted);padding:48px 0}.docx-view-container{max-width:850px;margin:0 auto;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow-sm);padding:48px 56px;min-height:70vh}.xlsx-scroll{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow-sm);overflow:auto;max-height:calc(100vh - 120px)}.xlsx-grid{border-collapse:collapse;font-size:12.5px}.xlsx-grid th{position:sticky;top:0;background:#f6f7f9;border:1px solid var(--border);color:var(--text-muted);font-weight:600;padding:4px 8px;min-width:90px;z-index:2}.xlsx-grid th.row-head{position:sticky;left:0;top:0;z-index:3;min-width:40px;text-align:center}.xlsx-grid td.row-head{position:sticky;left:0;background:#f6f7f9;border:1px solid var(--border);color:var(--text-muted);font-weight:600;text-align:center;z-index:1}.xlsx-grid td{border:1px solid var(--border);padding:0;height:26px;min-width:90px}.xlsx-grid .cell-text{display:block;padding:4px 8px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.docx-scale-wrap{width:100%;overflow:hidden}@media (max-width: 640px){.viewer-content{padding:12px}.docx-view-container{padding:24px 20px}.page{padding:16px}.card{padding:20px}.viewer-bar{padding:8px 12px}}