*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html,body,#root{height:100%;width:100%;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Open Sans,Helvetica Neue,sans-serif;font-size:14px;-webkit-font-smoothing:antialiased}:root{--bg: #f7f8fa;--surface: #ffffff;--border: #e2e8f0;--text-primary: #1a202c;--text-secondary: #718096;--text-muted: #a0aec0;--accent: #3b82f6;--accent-hover: #2563eb;--accent-light: #eff6ff;--error: #e53e3e;--error-light: #fff5f5;--success: #38a169;--red-btn: #e53e3e;--red-btn-hover: #c53030;--shadow-sm: 0 1px 3px rgba(0,0,0,.08), 0 1px 2px rgba(0,0,0,.04);--shadow-md: 0 4px 6px rgba(0,0,0,.07), 0 2px 4px rgba(0,0,0,.05);--radius: 8px;--radius-sm: 4px}[data-theme=dark]{--bg: #0f1117;--surface: #1a1d27;--border: #2d3748;--text-primary: #f7fafc;--text-secondary: #a0aec0;--text-muted: #718096;--accent: #60a5fa;--accent-hover: #3b82f6;--accent-light: #1e3a5f;--error: #fc8181;--error-light: #2d1515;--success: #68d391;--shadow-sm: 0 1px 3px rgba(0,0,0,.3);--shadow-md: 0 4px 6px rgba(0,0,0,.3)}.app{display:flex;flex-direction:column;height:100vh;background:var(--bg);color:var(--text-primary);overflow:hidden}.header{display:flex;align-items:center;justify-content:space-between;padding:0 24px;height:56px;background:var(--surface);border-bottom:1px solid var(--border);box-shadow:var(--shadow-sm);flex-shrink:0;z-index:10}.header-left{display:flex;align-items:center;gap:12px}.header-title{font-size:16px;font-weight:700;letter-spacing:-.3px;color:var(--text-primary)}.badge{font-size:11px;font-weight:600;padding:2px 8px;border-radius:999px;background:#d1fae5;color:#065f46}[data-theme=dark] .badge{background:#064e3b;color:#6ee7b7}.header-right{display:flex;align-items:center;gap:8px}.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;padding:6px 14px;border-radius:var(--radius-sm);font-size:13px;font-weight:500;cursor:pointer;transition:background .15s,color .15s,border-color .15s,opacity .15s;border:1px solid transparent;white-space:nowrap;line-height:1.4}.btn:disabled{opacity:.45;cursor:not-allowed}.btn-primary{background:var(--accent);color:#fff;border-color:var(--accent)}.btn-primary:hover:not(:disabled){background:var(--accent-hover);border-color:var(--accent-hover)}.btn-outline{background:transparent;color:var(--text-primary);border-color:var(--border)}.btn-outline:hover:not(:disabled){background:var(--bg)}.btn-ghost{background:transparent;color:var(--text-secondary);border-color:transparent}.btn-ghost:hover:not(:disabled){background:var(--bg);color:var(--text-primary)}.btn-danger-ghost{background:transparent;color:var(--error);border-color:transparent}.btn-danger-ghost:hover:not(:disabled){background:var(--error-light)}.btn-sm{padding:4px 10px;font-size:12px}.btn-xs{padding:2px 8px;font-size:11px}.btn-lg{padding:10px 24px;font-size:15px;font-weight:600}.main{flex:1;overflow:hidden;display:flex;flex-direction:column;padding:20px 24px;gap:16px}.input-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px;flex:1;overflow:hidden}.panel{display:flex;flex-direction:column;overflow:hidden}.panel-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:8px;flex-shrink:0}.panel-label{font-size:13px;font-weight:600;color:var(--text-primary)}.panel-hint{font-size:11px;color:var(--text-muted)}.panel-status-ok{font-size:11px;color:var(--success)}.editor-wrap{flex:1;border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;min-height:0;box-shadow:var(--shadow-sm);transition:border-color .15s}.editor-wrap.error{border-color:var(--error)}.error-msg{font-size:11px;color:var(--error);margin-top:6px;padding:4px 8px;background:var(--error-light);border-radius:var(--radius-sm)}.compare-bar{display:flex;justify-content:center;align-items:center;gap:12px;flex-shrink:0;padding:4px 0}.diff-view{display:flex;flex-direction:column;flex:1;overflow:hidden}.tab-bar{display:flex;gap:4px;border-bottom:2px solid var(--border);margin-bottom:12px;flex-shrink:0}.tab{padding:8px 18px;font-size:13px;font-weight:500;color:var(--text-secondary);cursor:pointer;border:none;background:transparent;border-bottom:2px solid transparent;margin-bottom:-2px;transition:color .15s,border-color .15s}.tab:hover{color:var(--text-primary)}.tab.active{color:var(--accent);border-bottom-color:var(--accent);font-weight:600}.tab-panel{display:none;flex:1;overflow:hidden;flex-direction:column}.tab-panel.active{display:flex}.diff-editor-wrap{flex:1;border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow-sm);min-height:0}.footer{text-align:center;padding:8px;font-size:11px;color:var(--text-muted);background:var(--surface);border-top:1px solid var(--border);flex-shrink:0}.divider{width:1px;height:20px;background:var(--border);margin:0 4px}@media(max-width:768px){.input-grid{grid-template-columns:1fr}.main{padding:12px}.header{padding:0 12px}.header-title{font-size:14px}}