:root{--bg:#f7f7f8;--card:#fff;--text:#111827;--muted:#6b7280;--line:#e5e7eb;--accent:#dc2626}
*{box-sizing:border-box}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Noto Sans JP",sans-serif;background:var(--bg);color:var(--text)}
header{position:sticky;top:0;background:#fff;border-bottom:1px solid var(--line);z-index:20}.top{max-width:980px;margin:0 auto;padding:12px 14px;display:flex;gap:10px;align-items:center;justify-content:space-between}.brand{font-weight:800;color:#b91c1c;text-decoration:none}
nav{display:flex;gap:8px;flex-wrap:wrap}nav a{font-size:13px;text-decoration:none;color:#374151;padding:7px 10px;border:1px solid var(--line);border-radius:999px;background:#fff}nav a.active{background:#fee2e2;border-color:#fecaca;color:#991b1b}
.wrap{max-width:980px;margin:14px auto;padding:0 12px 24px}.card{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:14px;margin-bottom:12px}
h1{font-size:26px;margin:0 0 6px}h2{font-size:18px;margin:0 0 10px}h3{font-size:15px;margin:0 0 8px}.sub{color:var(--muted);margin:0}.grid{display:grid;gap:10px}@media(min-width:840px){.grid.two{grid-template-columns:1fr 1fr}.grid.three{grid-template-columns:1fr 1fr 1fr}}
ul{margin:0;padding-left:18px}li{margin:5px 0}
.btn{display:inline-block;text-decoration:none;color:#fff;background:var(--accent);padding:9px 12px;border-radius:9px;font-size:14px}.muted{color:var(--muted);font-size:13px}
.search{width:100%;padding:10px;border:1px solid var(--line);border-radius:10px}mark{background:#fde68a}
.timeline{position:relative;margin:6px 0 0;padding-left:22px}.timeline:before{content:"";position:absolute;left:8px;top:4px;bottom:4px;width:2px;background:#f3c3c6}
.t-item{position:relative;background:#fff;border:1px solid var(--line);border-radius:10px;padding:10px 10px 10px 12px;margin:0 0 10px}.t-item:before{content:"";position:absolute;left:-18px;top:14px;width:10px;height:10px;border-radius:999px;background:#dc2626;box-shadow:0 0 0 3px #fee2e2}
.t-time{font-weight:800;color:#991b1b;font-size:13px;margin-bottom:4px}.t-title{font-weight:700}.t-links{margin-top:6px;display:flex;gap:8px;flex-wrap:wrap}.t-links a{font-size:12px;text-decoration:none;border:1px solid #fecaca;color:#991b1b;background:#fff5f5;padding:5px 8px;border-radius:999px}
.src-box{background:#fafafa;border:1px dashed #d1d5db;border-radius:10px;padding:10px;white-space:pre-wrap;line-height:1.7;font-size:14px}
.check label{display:block;margin:6px 0}input[type="checkbox"]{transform:scale(1.15);margin-right:8px}
footer{max-width:980px;margin:0 auto 26px;padding:0 12px;color:var(--muted);font-size:12px}