/* MIGRA Chapter 1 interactive VI/SK content */
.migra-ch1{max-width:850px}.migra-ch1-lead{font-size:17px;color:var(--muted);line-height:1.8}
.migra-ch1-toc{display:flex;gap:8px;flex-wrap:wrap;margin:22px 0}
.migra-ch1-toc a{border:1px solid var(--line-2);padding:7px 12px;border-radius:99px;text-decoration:none;font-size:13px;color:var(--text)}
.migra-ch1-card{border:1px solid var(--line);background:var(--panel);border-radius:14px;padding:22px;margin:14px 0;scroll-margin-top:100px}
.migra-ch1-card h2{font-size:21px;color:var(--text);margin:0 0 15px}.migra-ch1-card h2 small{font-size:13px;color:var(--accent);margin-right:8px}
.migra-ch1-card li{line-height:1.75;margin-bottom:6px}.migra-ch1-card ul{padding-left:22px}
.migra-ch1-tip{background:var(--accent-soft);border-left:3px solid var(--accent);padding:12px;border-radius:8px}
.migra-ch1-warning{background:#452b28;border-left:3px solid #e9927e;padding:12px;border-radius:8px}
.migra-ch1-checklist ul{list-style:none;padding:0;margin:12px 0;display:grid;gap:8px}
.migra-ch1-checklist li{margin:0}.migra-ch1-checklist label{display:flex;gap:12px;align-items:flex-start;background:var(--bg-2);border:1px solid var(--line);border-radius:9px;padding:10px 12px;cursor:pointer}
.migra-ch1-checklist input{width:18px;height:18px;flex-shrink:0;accent-color:var(--accent);margin-top:3px}
.migra-ch1-checklist input:checked+span{text-decoration:line-through;color:var(--muted)}
.migra-ch1-progress{display:flex;align-items:center;gap:12px;font-size:13px;color:var(--muted)}
.migra-ch1-track{height:7px;background:var(--line);border-radius:99px;overflow:hidden;flex:1}
.migra-ch1-bar{height:100%;width:0;background:var(--accent);transition:width .2s}
.migra-ch1-reset{background:none;border:none;text-decoration:underline;cursor:pointer;font-size:13px}
.migra-ch1-card details{padding:12px 0;border-bottom:1px solid var(--line)}
.migra-ch1-card summary{font-weight:600;cursor:pointer}.migra-ch1-sources{margin-top:25px}