:root{--primary: #2563eb;--primary-hover: #1d4ed8;--bg: #f1f5f9;--card-bg: #ffffff;--text: #1e293b;--text-muted: #64748b;--border: #e2e8f0;--success: #22c55e;--warning: #f59e0b;--danger: #ef4444;--shadow: 0 1px 3px rgba(0, 0, 0, .08), 0 1px 2px rgba(0, 0, 0, .04);--radius: 12px}*{box-sizing:border-box}html,body,#root{margin:0;padding:0;height:100%}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;background:var(--bg);color:var(--text);line-height:1.5;-webkit-font-smoothing:antialiased}.app{display:flex;flex-direction:column;min-height:100vh}.header{background:var(--card-bg);border-bottom:1px solid var(--border)}.header-inner{max-width:960px;margin:0 auto;padding:1rem 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1.25rem;color:var(--text-muted)}.card-success{border-color:#22c55e66;background:linear-gradient(180deg,rgba(34,197,94,.06),transparent)}.card-warning{border-color:#f59e0b66;background:linear-gradient(180deg,rgba(245,158,11,.06),transparent)}.card-error{border-color:#ef444466;background:linear-gradient(180deg,rgba(239,68,68,.06),transparent)}.btn{display:inline-flex;align-items:center;justify-content:center;border:1px solid var(--border);background:#fff;color:var(--text);padding:.65rem 1.25rem;font-size:.95rem;font-weight:600;border-radius:8px;cursor:pointer;transition:all .15s ease}.btn:hover:not(:disabled){border-color:var(--text-muted)}.btn-primary{background:var(--primary);border-color:var(--primary);color:#fff}.btn-primary:hover:not(:disabled){background:var(--primary-hover);border-color:var(--primary-hover)}.btn:disabled{opacity:.5;cursor:not-allowed}.info-grid{display:grid;grid-template-columns:max-content 1fr;column-gap:1.25rem;row-gap:.5rem;margin:0 0 1rem;font-size:.95rem}.info-grid dt{color:var(--text-muted);font-weight:500}.info-grid dd{margin:0;font-weight:500}.mono{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:.9rem}.version-target{color:var(--primary);font-weight:700}.hint{background:#f8fafc;border-left:3px solid var(--text-muted);padding:.6rem .85rem;margin:0 0 1rem;font-size:.85rem;color:var(--text-muted)}.info-block,.risk-block{border-radius:8px;padding:.85rem 1rem;margin:0 0 1rem;font-size:.9rem}.info-block p,.risk-block p{margin:0;color:var(--text)}.info-block-title,.risk-block-title{font-weight:600;margin:0 0 .35rem;font-size:.9rem}.info-block{background:#2563eb0f;border:1px solid rgba(37,99,235,.2)}.info-block-title{color:var(--primary)}.risk-block{background:#f59e0b14;border:1px solid rgba(245,158,11,.3)}.risk-block-title{color:var(--warning)}.mismatch-banner{background:#ef444414;border:1px solid rgba(239,68,68,.35);border-radius:8px;padding:.85rem 1rem;margin:0 0 1rem;font-size:.9rem}.mismatch-banner p{margin:0 0 .6rem;color:var(--text)}.mismatch-banner-title{font-weight:600;margin:0 0 .35rem;font-size:.95rem;color:var(--danger)}.checkbox-row-required{background:#f59e0b0f;border:1px solid rgba(245,158,11,.25);border-radius:6px;padding:.6rem .75rem;align-items:flex-start;font-size:.9rem;line-height:1.4}.release-notes{background:#f8fafc;border-left:3px solid var(--primary);padding:.75rem 1rem;margin:0 0 1rem;font-size:.9rem;color:var(--text)}.checkbox-row{display:flex;align-items:center;gap:.5rem;margin:0 0 1rem;font-size:.95rem;cursor:pointer}.checkbox-row input{width:1rem;height:1rem}.progress{display:flex;flex-direction:column;gap:.5rem}.progress-bar{height:8px;background:#e2e8f0;border-radius:999px;overflow:hidden}.progress-fill{height:100%;background:var(--primary);transition:width .2s 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