:root{--bg: #f5f5f3;--surface: #ffffff;--text: #111111;--muted: #6b6b6b;--border: #e4e4e0;--accent: #ff5a1f;font-family:Inter,system-ui,-apple-system,Segoe UI,Roboto,sans-serif;color:var(--text);background:var(--bg);-webkit-font-smoothing:antialiased}*{box-sizing:border-box}body{margin:0;background:var(--bg)}a{color:inherit;text-decoration:none}.page{min-height:100vh;display:flex;flex-direction:column}.header{padding:20px 32px;border-bottom:1px solid var(--border);background:var(--surface)}.brand{display:inline-flex;align-items:center;gap:12px;font-size:18px}.main{flex:1;width:100%;max-width:1100px;margin:0 auto;padding:40px 32px}.footer{padding:24px 32px;color:var(--muted);font-size:13px}.title{margin:0 0 8px;font-size:32px;letter-spacing:-.02em}.subtitle{margin:0 0 32px;color:var(--muted)}.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:16px}.card{position:relative;display:flex;flex-direction:column;gap:8px;padding:24px;background:var(--surface);border:1px solid var(--border);border-radius:16px;transition:border-color .15s,transform .15s}.card:hover{border-color:var(--text);transform:translateY(-2px)}.card-icon{font-size:28px}.card-title{font-weight:600;font-size:17px}.card-desc{color:var(--muted);font-size:14px;line-height:1.45}.badge{position:absolute;top:20px;right:20px;padding:3px 10px;border-radius:999px;background:#fff1eb;color:var(--accent);font-size:12px;font-weight:600}.back{display:inline-block;margin-bottom:20px;color:var(--muted);font-size:14px}.back:hover{color:var(--text)}.placeholder{padding:48px 24px;border:2px dashed var(--border);border-radius:16px;background:var(--surface);color:var(--muted);text-align:center}@media(max-width:600px){.header,.main,.footer{padding-left:16px;padding-right:16px}}.muted{color:var(--muted);font-size:13px}.stack{display:flex;flex-direction:column;gap:16px}.dropzone{display:flex;flex-direction:column;align-items:center;gap:8px;padding:56px 24px;border:2px dashed var(--border);border-radius:16px;background:var(--surface);text-align:center;cursor:pointer;transition:border-color .15s,background .15s}.dropzone:hover,.dropzone.over{border-color:var(--accent);background:#fff8f5}.dropzone-icon{font-size:36px}.dropzone-title{font-weight:600;font-size:17px}.panel{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:16px;padding:20px 24px;background:var(--surface);border:1px solid var(--border);border-radius:16px}.panel.column{flex-direction:column;align-items:stretch;gap:10px}.panel-main{display:flex;flex-direction:column;gap:12px;min-width:0}.file-name{font-weight:600;overflow-wrap:anywhere}.stats{display:flex;flex-wrap:wrap;gap:28px}.stat-value{font-size:22px;font-weight:700}.stat-label{color:var(--muted);font-size:12px}.panel-actions{display:flex;flex-wrap:wrap;gap:8px}.btn{display:inline-flex;align-items:center;padding:10px 18px;border:1px solid var(--border);border-radius:10px;background:var(--surface);color:var(--text);font:inherit;font-weight:600;font-size:14px;cursor:pointer}.btn:hover:not(:disabled){border-color:var(--text)}.btn.primary{border-color:var(--text);background:var(--text);color:#fff}.btn.primary:hover:not(:disabled){background:#333}.btn:disabled{opacity:.5;cursor:default}.progress-head{display:flex;justify-content:space-between;font-weight:600;font-size:14px}.progress{height:8px;border-radius:999px;background:var(--bg);overflow:hidden}.progress>div{height:100%;background:var(--accent);transition:width .3s}.alert{padding:14px 18px;border-radius:12px;font-size:14px;line-height:1.5}.alert.error{background:#fdecec;color:#a4161a}.alert.warn{background:#fff6e0;color:#6b4a00}.alert ul{margin:8px 0 0;padding-left:18px}.alert li{margin-bottom:6px;overflow-wrap:anywhere}.alert a{text-decoration:underline}.segmented{display:inline-flex;margin-bottom:12px;padding:3px;border-radius:10px;background:var(--border)}.segmented button{padding:6px 14px;border:0;border-radius:8px;background:transparent;font:inherit;font-size:14px;cursor:pointer}.segmented button.active{background:var(--surface);font-weight:600}.segmented button:disabled{opacity:.4;cursor:default}.sheet{border:1px solid var(--border);border-radius:12px;background:var(--surface);overflow:hidden}.sheet-scroll{max-height:560px;overflow:auto}.sheet table{border-collapse:separate;border-spacing:0;font-size:13px}.sheet th,.sheet td{padding:6px 10px;border-right:1px solid var(--border);border-bottom:1px solid var(--border);white-space:nowrap;max-width:280px;overflow:hidden;text-overflow:ellipsis;text-align:left}.sheet thead th{position:sticky;top:0;z-index:2;background:#f0f0ec;color:var(--muted);font-weight:500;text-align:center}.sheet tbody th{position:sticky;left:0;z-index:1;background:#f0f0ec;color:var(--muted);font-weight:500;text-align:right}.sheet thead th.corner{left:0;z-index:3}.sheet td a{color:#1a5fd0;text-decoration:underline}.sheet td.changed{background:#e6f6ea}.sheet-footer{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:8px;padding:6px 10px;border-top:1px solid var(--border);background:#f7f7f5}.sheet-tabs{display:flex;gap:4px;overflow-x:auto}.sheet-tabs button{padding:4px 12px;border:1px solid transparent;border-radius:6px;background:transparent;font:inherit;font-size:13px;cursor:pointer;white-space:nowrap}.sheet-tabs button.active{border-color:var(--border);background:var(--surface);font-weight:600}.sheet-layout{display:grid;grid-template-columns:340px minmax(0,1fr);gap:12px;align-items:start}.links-panel{display:flex;flex-direction:column;border:1px solid var(--border);border-radius:12px;background:var(--surface);overflow:hidden}.links-head{padding:10px 14px;border-bottom:1px solid var(--border);background:#f0f0ec;font-weight:600;font-size:13px}.links-list{max-height:560px;overflow-y:auto}.links-empty{padding:14px}.link-item{display:flex;gap:10px;width:100%;padding:8px 14px;border:0;border-bottom:1px solid var(--border);background:transparent;font:inherit;text-align:left;cursor:pointer}.link-item:hover{background:#f7f7f5}.link-item.selected{background:#fff1eb}.link-ref{flex:none;min-width:36px;color:var(--muted);font-size:12px;font-weight:600;line-height:1.5}.link-urls{display:flex;flex-direction:column;gap:2px;min-width:0}.url{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:12px;line-height:1.5;word-break:break-all}.url-host{color:var(--text);font-weight:600}.url-path{color:var(--muted)}.link-old{opacity:.55}.sheet td.has-link{cursor:pointer}.sheet td.selected{box-shadow:inset 0 0 0 2px var(--accent)}@media(max-width:900px){.sheet-layout{grid-template-columns:minmax(0,1fr)}.links-list{max-height:260px}}