*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --primary:#00B894;--primary-light:#55EFC4;--accent:#FDCB6E;
  --bg:#0A1A14;--bg-surface:#0F2A1F;--bg-card:#132E22;--bg-elevated:#1A3D2D;
  --text:#E8F5E9;--text-secondary:#81C784;--text-muted:#4CAF50;
  --border:rgba(0,184,148,0.15);--border-accent:rgba(0,184,148,0.35);
  --success:#00B894;--error:#FF7675;--warning:#FDCB6E;
  --diff-add:rgba(0,184,148,0.12);--diff-remove:rgba(255,118,117,0.12);
  --diff-add-text:#55EFC4;--diff-remove-text:#FF7675;
  --radius:12px;--transition:0.25s ease;
}
html{font-size:16px;scroll-behavior:smooth}
body{font-family:'Inter',system-ui,sans-serif;background:var(--bg);color:var(--text);line-height:1.6;min-height:100vh;-webkit-font-smoothing:antialiased}
.app{max-width:1100px;margin:0 auto;padding:2rem 1.5rem;min-height:100vh;display:flex;flex-direction:column}
.header{display:flex;align-items:center;justify-content:space-between;margin-bottom:1.5rem;flex-wrap:wrap;gap:1rem}
.logo{display:flex;align-items:center;gap:0.75rem}
.logo h1{font-size:1.5rem;font-weight:800;background:linear-gradient(135deg,var(--primary),var(--primary-light));-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.header-right{display:flex;align-items:center;gap:0.5rem}
select{padding:0.625rem 2rem 0.625rem 0.75rem;background:var(--bg-card);border:1px solid var(--border);border-radius:8px;color:var(--text);font-family:'JetBrains Mono',monospace;font-size:0.8125rem;appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='14' viewBox='0 0 24 24' fill='none' stroke='%2381C784' stroke-width='2'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 0.5rem center;cursor:pointer}
select:focus{outline:none;border-color:var(--primary)}
.btn{padding:0.625rem 1.25rem;border:none;border-radius:8px;font-family:inherit;font-size:0.875rem;font-weight:600;cursor:pointer;transition:all var(--transition);display:inline-flex;align-items:center;gap:0.5rem}
.btn-primary{background:linear-gradient(135deg,var(--primary),#00A885);color:#fff;box-shadow:0 2px 12px rgba(0,184,148,0.35)}
.btn-primary:hover{transform:translateY(-1px);box-shadow:0 4px 20px rgba(0,184,148,0.5)}
.btn-sm{padding:0.375rem 0.75rem;border:1px solid var(--border);border-radius:6px;background:var(--bg-elevated);color:var(--text-secondary);font-family:inherit;font-size:0.75rem;font-weight:600;cursor:pointer;transition:all var(--transition)}
.btn-sm:hover{border-color:var(--primary);color:var(--text)}
.editors{display:grid;grid-template-columns:1fr 1fr;gap:0.75rem;margin-bottom:1.5rem}
.editor-pane{display:flex;flex-direction:column}
.editor-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:0.5rem}
.editor-label{font-size:0.8125rem;font-weight:600;color:var(--text-secondary);text-transform:uppercase;letter-spacing:0.04em}
.editor{width:100%;min-height:250px;padding:1rem;background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);color:var(--text);font-family:'JetBrains Mono',monospace;font-size:0.8125rem;line-height:1.7;resize:vertical;transition:border-color var(--transition)}
.editor:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px rgba(0,184,148,0.12)}
.results{display:flex;flex-direction:column;gap:1rem;animation:fadeIn 0.3s ease}
@keyframes fadeIn{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}
.summary-bar{display:flex;gap:1rem;flex-wrap:wrap}
.summary-item{display:flex;align-items:center;gap:0.5rem;padding:0.5rem 1rem;background:var(--bg-card);border:1px solid var(--border);border-radius:8px;font-size:0.8125rem;font-weight:600}
.summary-item .count{font-family:'JetBrains Mono',monospace;font-weight:700}
.summary-item.added{color:var(--diff-add-text);border-color:rgba(0,184,148,0.25)}
.summary-item.removed{color:var(--diff-remove-text);border-color:rgba(255,118,117,0.25)}
.summary-item.modified{color:var(--accent);border-color:rgba(253,203,110,0.25)}
.tabs{display:flex;gap:0.25rem;background:var(--bg-card);border-radius:8px;padding:3px;border:1px solid var(--border)}
.tab{flex:1;padding:0.625rem;border:none;background:transparent;color:var(--text-secondary);font-family:inherit;font-size:0.8125rem;font-weight:600;border-radius:6px;cursor:pointer;transition:all var(--transition)}
.tab:hover{color:var(--text)}
.tab.active{background:var(--primary);color:#fff;box-shadow:0 2px 8px rgba(0,184,148,0.3)}
.tab-panel{display:none}
.tab-panel.active{display:block}
.diff-view{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);overflow:auto;max-height:500px}
.diff-table{width:100%;border-collapse:collapse;font-family:'JetBrains Mono',monospace;font-size:0.8125rem}
.diff-table td{padding:0.25rem 0.75rem;border-bottom:1px solid rgba(0,184,148,0.06);white-space:pre;vertical-align:top}
.diff-table .line-num{width:40px;text-align:right;color:var(--text-muted);opacity:0.5;user-select:none;border-right:1px solid var(--border)}
.diff-table .line-add{background:var(--diff-add);color:var(--diff-add-text)}
.diff-table .line-remove{background:var(--diff-remove);color:var(--diff-remove-text)}
.diff-table .line-context{color:var(--text-secondary)}
.diff-section-header{background:rgba(253,203,110,0.08);color:var(--accent);font-weight:600;padding:0.5rem 0.75rem;border-bottom:1px solid var(--border)}
.migration-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:0.5rem}
.migration-header span{font-size:0.875rem;font-weight:600}
.migration-actions{display:flex;gap:0.375rem}
.migration-code{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:1rem;font-family:'JetBrains Mono',monospace;font-size:0.8125rem;line-height:1.7;color:var(--primary-light);overflow:auto;max-height:400px;white-space:pre-wrap}
.error-box{padding:1rem;background:rgba(255,118,117,0.08);border:1px solid rgba(255,118,117,0.25);border-radius:var(--radius);color:var(--error);font-size:0.875rem}
.error-box.hidden{display:none}
.hidden{display:none!important}
.toast{position:fixed;bottom:2rem;left:50%;transform:translateX(-50%) translateY(100px);background:var(--bg-card);border:1px solid var(--border-accent);border-radius:8px;padding:0.75rem 1.5rem;font-size:0.875rem;font-weight:500;box-shadow:0 8px 30px rgba(0,0,0,0.5);z-index:100;transition:transform 0.3s cubic-bezier(0.34,1.56,0.64,1);pointer-events:none}
.toast.show{transform:translateX(-50%) translateY(0)}
.toast.hidden{display:block;transform:translateX(-50%) translateY(100px)}
.footer{margin-top:auto;padding-top:2rem;text-align:center;font-size:0.75rem;color:var(--text-muted)}
@media(max-width:768px){
  .editors{grid-template-columns:1fr}
  .editor{min-height:180px}
  .header{flex-direction:column;align-items:flex-start}
}