:root{--bg:#0d1117;--surface:#161b22;--border:#30363d;--text:#e6edf3;--text-muted:#8b949e;--accent:#58a6ff;--green:#3fb950;--green-bg:#3fb9501a;--red:#f85149;--red-bg:#f851491a;--yellow:#d29922;--yellow-bg:#d299221a;--radius:6px}*{box-sizing:border-box;margin:0;padding:0}body{background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Helvetica,Arial,sans-serif;line-height:1.5}.app{max-width:1400px;margin:0 auto;padding:24px}.app-header{justify-content:center;align-items:center;gap:16px;margin-bottom:24px;display:flex}.header-nav{align-items:center;gap:12px;margin-left:auto;display:flex}.header-link{color:var(--text-muted);font-size:14px;text-decoration:none}.header-link:hover{color:var(--accent)}.rainbow-link{border-radius:var(--radius);background:linear-gradient(var(--surface), var(--surface)) padding-box, conic-gradient(#ef6b61, #f3795e, #f7c664, #77bba5, #689cca, #b895c6, #ef6b61) border-box;color:var(--text);border:2px solid #0000;padding:4px 12px}.rainbow-link:hover{background:linear-gradient(var(--bg), var(--bg)) padding-box, conic-gradient(#ef6b61, #f3795e, #f7c664, #77bba5, #689cca, #b895c6, #ef6b61) border-box;color:var(--text)}.app-logo{width:auto;height:96px}.app-header h1{font-size:28px;font-weight:600}.subtitle{color:var(--text-muted);font-size:14px}.input-section{grid-template-columns:1fr 1fr;gap:16px;margin-bottom:16px;display:grid}.json-input{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:12px}.json-input-header{align-items:center;gap:8px;margin-bottom:8px;display:flex}.json-input-label{flex:1;font-size:14px;font-weight:600}.file-btn{background:var(--border);color:var(--text);border-radius:var(--radius);cursor:pointer;border:none;padding:4px 12px;font-size:12px}.file-btn:hover{background:var(--accent);color:#000}.file-name{color:var(--accent);margin-bottom:4px;font-size:12px}.json-textarea{background:var(--bg);width:100%;height:200px;color:var(--text);border:1px solid var(--border);border-radius:var(--radius);resize:vertical;padding:8px;font-family:SF Mono,Fira Code,monospace;font-size:13px}.json-textarea:focus{border-color:var(--accent);outline:none}.json-input-footer{justify-content:space-between;margin-top:4px;font-size:12px;display:flex}.char-count{color:var(--text-muted)}.json-error{color:var(--red)}.actions{text-align:center;margin-bottom:16px}.compare-btn{background:var(--accent);color:#000;border-radius:var(--radius);cursor:pointer;border:none;padding:10px 32px;font-size:16px;font-weight:600}.compare-btn:hover:not(:disabled){opacity:.9}.compare-btn:disabled{opacity:.5;cursor:not-allowed}.global-error{color:var(--red);margin-top:8px;font-size:14px}.stats-bar{flex-wrap:wrap;justify-content:center;gap:16px;margin-bottom:12px;display:flex}.stat{text-align:center;border-radius:var(--radius);background:var(--surface);border:1px solid var(--border);min-width:80px;padding:8px 16px}.stat-count{font-size:20px;font-weight:700;display:block}.stat-label{color:var(--text-muted);text-transform:uppercase;font-size:11px}.stat-added .stat-count{color:var(--green)}.stat-removed .stat-count{color:var(--red)}.stat-changed .stat-count{color:var(--yellow)}.timing{text-align:center;color:var(--text-muted);margin-bottom:12px;font-size:12px}.timing-details{max-width:720px;color:var(--text-muted);margin:0 auto 12px;font-size:12px}.timing-details summary{cursor:pointer;text-align:center}.timing-grid{flex-wrap:wrap;justify-content:center;gap:6px 14px;margin-top:6px;display:flex}.filter-bar{color:var(--text-muted);justify-content:center;align-items:center;gap:8px;margin-bottom:16px;font-size:14px;display:flex}.filter-btn{background:var(--surface);color:var(--text-muted);border:1px solid var(--border);border-radius:var(--radius);cursor:pointer;padding:4px 12px;font-size:12px}.filter-btn.active{border-color:var(--accent);color:var(--text)}.filter-btn.filter-added.active{border-color:var(--green);color:var(--green)}.filter-btn.filter-removed.active{border-color:var(--red);color:var(--red)}.filter-btn.filter-changed.active{border-color:var(--yellow);color:var(--yellow)}.filter-btn.filter-context.active{border-color:var(--text-muted);color:var(--text-muted)}.diff-tree{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);max-height:70vh;padding:8px;font-family:SF Mono,Fira Code,monospace;font-size:13px;overflow-y:auto}.diff-empty{text-align:center;color:var(--text-muted);padding:32px}.tree-row{white-space:nowrap;border-radius:3px;align-items:center;gap:6px;padding:2px 4px;display:flex}.tree-row:hover{background:#ffffff0a}.diff-added{background:var(--green-bg)}.diff-removed{background:var(--red-bg)}.diff-changed{background:var(--yellow-bg)}.diff-context{opacity:.82}.expand-btn{color:var(--text-muted);cursor:pointer;text-align:center;background:0 0;border:none;width:16px;padding:0;font-size:10px}.expand-spacer{width:16px;display:inline-block}.node-key{color:var(--accent);font-weight:600}.node-values{color:var(--text-muted);align-items:center;gap:6px;display:flex;overflow:hidden}.val-left{color:var(--red);text-decoration:line-through}.val-right{color:var(--green)}.val-unchanged,.arrow{color:var(--text-muted)}.node-meta{color:var(--text-muted);font-size:11px}.diff-badge{border-radius:3px;flex-shrink:0;margin-left:auto;padding:1px 6px;font-size:10px}.diff-badge.diff-added{color:var(--green);border:1px solid var(--green)}.diff-badge.diff-removed{color:var(--red);border:1px solid var(--red)}.diff-badge.diff-changed{color:var(--yellow);border:1px solid var(--yellow)}.diff-badge.diff-context{color:var(--text-muted);border:1px solid var(--border)}.large-file-notice{background:var(--bg);border:1px dashed var(--border);border-radius:var(--radius);flex-direction:column;justify-content:center;align-items:center;gap:8px;height:200px;display:flex}.large-file-size{color:var(--accent);font-size:24px;font-weight:700}.large-file-msg{color:var(--text-muted);font-size:13px}.show-content-btn{background:var(--border);color:var(--text);border-radius:var(--radius);cursor:pointer;border:none;padding:6px 16px;font-size:13px}.show-content-btn:hover{background:var(--accent);color:#000}.progress-container{max-width:400px;margin-top:12px;margin-left:auto;margin-right:auto}.progress-bar{background:var(--border);border-radius:4px;height:8px;overflow:hidden}.progress-fill{background:var(--accent);border-radius:4px;height:100%;transition:width .15s}.progress-text{text-align:center;color:var(--text-muted);margin-top:4px;font-size:12px}.tree-toast{background:var(--surface);color:var(--yellow);border:1px solid var(--yellow);border-radius:var(--radius);white-space:nowrap;z-index:10;pointer-events:none;padding:6px 16px;font-size:12px;animation:3.5s forwards toast-fade;position:absolute;left:50%;transform:translate(-50%)}@keyframes toast-fade{0%{opacity:1}75%{opacity:1}to{opacity:0}}.tree-node{position:relative}@media (width<=768px){.input-section{grid-template-columns:1fr}}