:root{color-scheme:light;--bg: #fff;--text: #111;--muted: #666;--border: #e5e7eb;--panel: #f8fafc}*{box-sizing:border-box}body{margin:0;font-family:Arial,Helvetica,sans-serif;color:var(--text);background:var(--bg)}#app-header{position:sticky;top:0;background:var(--bg);border-bottom:1px solid var(--border);z-index:10}#tool-tabs{display:flex;gap:8px;padding:10px;overflow-x:auto}.tool-tab{border:1px solid var(--border);background:#fff;padding:8px 12px;border-radius:10px;cursor:pointer;white-space:nowrap}.tool-tab.active{border-color:#111}#app-main{padding:14px;max-width:900px;margin:0 auto}.tool h1{margin:0 0 6px;font-size:20px}.tool p{margin:0 0 12px;color:var(--muted)}.panel{border:1px solid var(--border);background:var(--panel);border-radius:14px;padding:12px}.row{display:flex;gap:10px;margin-top:10px;flex-wrap:wrap}button{border:1px solid var(--border);background:#fff;padding:10px 12px;border-radius:12px;cursor:pointer}button.primary{border-color:#111}button:disabled{opacity:.5;cursor:not-allowed}.file-list{margin-top:12px}.file-list ul{margin:0;padding-left:18px}.status{margin-top:10px;color:var(--muted)}.muted{color:var(--muted)}.dropzone{position:relative;border:2px dashed var(--border);border-radius:14px;padding:18px;background:#fff;cursor:pointer;text-align:center}.dropzone.dragover{border-color:#111}.dropzone-title{font-weight:700;margin-bottom:4px}.dropzone-sub{color:var(--muted);font-size:12px}.dropzone-input{position:absolute;top:0;right:0;bottom:0;left:0;opacity:0;cursor:pointer}.file-table{display:flex;flex-direction:column;gap:10px;margin-top:12px}.file-row{display:flex;gap:10px;justify-content:space-between;align-items:center;border:1px solid var(--border);background:#fff;border-radius:12px;padding:10px}.file-meta{min-width:0}.file-name{font-weight:700;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;max-width:56vw}.file-actions{display:flex;gap:8px;flex-wrap:wrap;justify-content:flex-end}button.mini{padding:8px 10px;border-radius:10px}