:root{
  --bg:#f6f7fb;
  --card:#ffffff;
  --text:#111827;
  --muted:#6b7280;
  --line:#e5e7eb;
  --accent:#ff4081;
  --accent2:#111827;
  --radius:14px;
}
*{box-sizing:border-box}
body{
  margin:0;
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,"Noto Sans JP","Hiragino Kaku Gothic ProN","Yu Gothic",Meiryo,sans-serif;
  color:var(--text);
  background:var(--bg);
  line-height:1.75;
}
a{color:inherit}
.container{max-width:980px;margin:0 auto;padding:18px}
.topbar{
  position:sticky;top:0;z-index:10;
  background:rgba(246,247,251,.92);
  backdrop-filter: blur(10px);
  border-bottom:1px solid var(--line);
}
.nav{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  padding:12px 18px;
}
.brand{display:flex;gap:10px;align-items:center;text-decoration:none}
.brand b{letter-spacing:.02em}
.pill{
  display:inline-flex;align-items:center;gap:8px;
  padding:8px 10px;border:1px solid var(--line);
  border-radius:999px;background:#fff;
  font-size:13px;color:var(--muted);
}
.hero{
  padding:26px 0 10px;
}
.grid{
  display:grid;gap:14px;
}
@media(min-width:860px){ .grid.cols2{grid-template-columns:1.35fr .65fr} }
.card{
  background:var(--card); border:1px solid var(--line);
  border-radius:var(--radius); padding:18px;
  box-shadow:0 10px 24px rgba(17,24,39,.05);
}
h1{margin:0 0 10px;font-size:28px;line-height:1.25}
h2{margin:18px 0 10px;font-size:20px}
h3{margin:16px 0 8px;font-size:16px}
small, .muted{color:var(--muted)}
.badges{display:flex;flex-wrap:wrap;gap:8px;margin:12px 0}
.badge{
  font-size:12px;border:1px solid var(--line);
  padding:6px 10px;border-radius:999px;background:#fff;
}
.cta{
  display:flex;flex-direction:column;gap:10px;
  padding:14px;border:1px solid rgba(255,64,129,.25);
  border-radius:var(--radius); background:linear-gradient(180deg, rgba(255,64,129,.09), rgba(255,64,129,.03));
}
.btn{
  display:inline-flex;justify-content:center;align-items:center;gap:10px;
  padding:14px 16px;border-radius:12px;
  background:var(--accent); color:#fff; text-decoration:none;
  font-weight:800; letter-spacing:.01em;
  border:1px solid rgba(0,0,0,.08);
}
.btn.secondary{
  background:#fff;color:var(--accent2);
}
.btn:active{transform:translateY(1px)}
.kv{
  display:flex;gap:14px;align-items:flex-start;flex-wrap:wrap
}
.kv svg{flex:0 0 auto}
.table{
  width:100%;border-collapse:separate;border-spacing:0;
  border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:#fff
}
.table th,.table td{padding:12px 12px;border-bottom:1px solid var(--line);vertical-align:top}
.table th{background:#fafafa;text-align:left;font-size:13px;color:var(--muted)}
.table tr:last-child td{border-bottom:none}
.footer{
  margin-top:26px;padding:22px 0;
  border-top:1px solid var(--line);
  color:var(--muted);font-size:12px
}
.links{display:flex;flex-wrap:wrap;gap:10px;margin-top:10px}
.links a{color:var(--muted)}
.postmeta{display:flex;gap:10px;flex-wrap:wrap}
.hr{height:1px;background:var(--line);margin:18px 0}
.note{
  font-size:12px;color:var(--muted);
}
.toc{
  border:1px solid var(--line);border-radius:var(--radius);
  padding:14px;background:#fff
}
.toc a{color:var(--muted);text-decoration:none}
.toc ul{margin:8px 0 0;padding-left:18px}