body{margin:0}:root{--bg: #0d1117;--bg-2: #161b22;--bg-3: #21262d;--border: #30363d;--text: #e6edf3;--text-muted: #8b949e;--accent: #58a6ff;--green: #57f287;--red: #ed4245;--orange: #f57c00;--yellow: #fee75c}*{box-sizing:border-box;margin:0;padding:0}body{background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;line-height:1.6}.app{max-width:960px;margin:0 auto;padding:2rem 1.5rem}header{text-align:center;margin-bottom:2.5rem}header h1{font-size:2rem;margin-bottom:.5rem}.subtitle{color:var(--text-muted);font-size:1.05rem}.input-section{background:var(--bg-2);border:1px solid var(--border);border-radius:12px;padding:1.5rem;margin-bottom:2rem}.version-row{display:flex;align-items:end;gap:1rem;margin-bottom:1.5rem}.version-select{flex:1}.version-select label{display:block;font-size:.85rem;color:var(--text-muted);margin-bottom:.4rem;font-weight:600}.version-select select{width:100%;padding:.6rem;background:var(--bg-3);color:var(--text);border:1px solid var(--border);border-radius:6px;font-size:1rem;cursor:pointer}.arrow{font-size:1.5rem;color:var(--accent);padding-bottom:.4rem}.config-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:.4rem}.config-header label{font-size:.85rem;color:var(--text-muted);font-weight:600}.config-input textarea{width:100%;padding:.8rem;background:var(--bg);color:var(--text);border:1px solid var(--border);border-radius:6px;font-family:SF Mono,Fira Code,monospace;font-size:.85rem;resize:vertical;margin-bottom:1rem}.config-input textarea:focus{outline:none;border-color:var(--accent)}.btn-small{background:var(--bg-3);color:var(--text-muted);border:1px solid var(--border);padding:.3rem .8rem;border-radius:6px;cursor:pointer;font-size:.8rem}.btn-small:hover{color:var(--text);border-color:var(--text-muted)}.btn-primary{width:100%;padding:.8rem;background:var(--accent);color:#000;border:none;border-radius:8px;font-size:1rem;font-weight:700;cursor:pointer;transition:opacity .2s}.btn-primary:hover{opacity:.9}.error-box{background:#ed424522;border:1px solid var(--red);color:var(--red);padding:1rem;border-radius:8px;margin-bottom:1.5rem}.results-section{margin-top:1.5rem}.summary-bar{display:flex;gap:1rem;margin-bottom:1.5rem;flex-wrap:wrap}.summary-stat{flex:1;min-width:100px;background:var(--bg-2);border:1px solid var(--border);border-radius:8px;padding:1rem;text-align:center}.stat-number{display:block;font-size:1.8rem;font-weight:800}.stat-label{font-size:.75rem;color:var(--text-muted);text-transform:uppercase;letter-spacing:.05em}.tabs{display:flex;gap:0;border-bottom:1px solid var(--border);margin-bottom:1.5rem}.tab{padding:.7rem 1.2rem;background:none;color:var(--text-muted);border:none;border-bottom:2px solid transparent;cursor:pointer;font-size:.9rem;font-weight:600;transition:all .2s}.tab:hover{color:var(--text)}.tab.active{color:var(--accent);border-bottom-color:var(--accent)}.tab-content h2{margin-bottom:1rem;font-size:1.3rem}.empty-state{text-align:center;padding:3rem;color:var(--text-muted);font-size:1.1rem}.change-item{background:var(--bg-2);border:1px solid var(--border);border-radius:8px;padding:1rem 1.2rem;margin-bottom:.8rem}.change-item.detected{border-left:3px solid var(--red)}.change-item.not-detected{opacity:.7}.change-item h3{font-size:1rem;margin:.4rem 0}.change-item p{color:var(--text-muted);font-size:.9rem}.change-category{font-size:.7rem;background:var(--bg-3);padding:.15rem .5rem;border-radius:4px;color:var(--text-muted);text-transform:uppercase;margin-left:.5rem}.severity-badge{font-size:.7rem;padding:.15rem .6rem;border-radius:4px;font-weight:700;border:1px solid}.detected-badge{display:inline-block;margin-top:.5rem;font-size:.8rem;color:var(--red);font-weight:600}.not-detected-badge{display:inline-block;margin-top:.5rem;font-size:.8rem;color:var(--green)}.step-card{background:var(--bg-2);border:1px solid var(--border);border-radius:8px;padding:1rem 1.2rem;margin-bottom:.8rem;cursor:pointer;transition:border-color .2s}.step-card:hover{border-color:var(--accent)}.step-header{display:flex;align-items:center;gap:.5rem;flex-wrap:wrap}.step-number{background:var(--accent);color:#000;width:24px;height:24px;border-radius:50%;display:inline-flex;align-items:center;justify-content:center;font-size:.75rem;font-weight:800;flex-shrink:0}.step-header h3{font-size:.95rem;flex:1}.step-type-badge{font-size:.7rem;background:var(--bg-3);padding:.15rem .5rem;border-radius:4px}.step-desc{color:var(--text-muted);font-size:.85rem;margin:.5rem 0}.step-diff{margin-top:.8rem}.step-diff h4{font-size:.8rem;color:var(--text-muted);margin-bottom:.4rem}.expand-btn{background:none;border:none;color:var(--accent);font-size:.8rem;cursor:pointer;padding:.3rem 0}.docs-link{display:inline-block;color:var(--accent);font-size:.85rem;margin-top:.5rem;text-decoration:none}.docs-link:hover{text-decoration:underline}.diff-view{background:var(--bg);border:1px solid var(--border);border-radius:6px;padding:.8rem;font-family:SF Mono,Fira Code,monospace;font-size:.8rem;overflow-x:auto;line-height:1.5}.diff-line{white-space:pre}.diff-marker{display:inline-block;width:1.5rem;color:var(--text-muted);-webkit-user-select:none;user-select:none}.diff-add{background:#57f28718;color:var(--green)}.diff-remove{background:#ed424518;color:var(--red);text-decoration:line-through}.diff-same{color:var(--text-muted)}.migrated-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:1rem}.btn-copy{background:var(--green);color:#000;border:none;padding:.5rem 1rem;border-radius:6px;font-weight:700;cursor:pointer;font-size:.85rem}.btn-copy:hover{opacity:.9}.config-comparison{display:grid;grid-template-columns:1fr 1fr;gap:1rem;margin-bottom:1.5rem}.config-panel h4{font-size:.8rem;color:var(--text-muted);margin-bottom:.4rem;text-transform:uppercase}.config-panel pre{background:var(--bg);border:1px solid var(--border);border-radius:6px;padding:.8rem;font-family:SF Mono,Fira Code,monospace;font-size:.78rem;overflow-x:auto;white-space:pre;max-height:400px;overflow-y:auto}.migrated-config{border-color:var(--green)!important}.diff-section h4{font-size:.85rem;color:var(--text-muted);margin-bottom:.5rem}.section-title{font-size:1rem;margin:1.5rem 0 .8rem;color:var(--text-muted)}footer{margin-top:3rem;text-align:center;color:var(--text-muted);font-size:.8rem;padding-top:1.5rem;border-top:1px solid var(--border)}footer a{color:var(--accent);text-decoration:none}footer a:hover{text-decoration:underline}@media(max-width:640px){.config-comparison{grid-template-columns:1fr}.summary-bar,.version-row{flex-direction:column}.arrow{text-align:center;transform:rotate(90deg)}}