:root{--fg: #1f2328;--muted: #656d76;--border: #d0d7de;--bg: #f6f8fa;--accent: #0969da;--danger: #cf222e;--ok: #1a7f37}*{box-sizing:border-box}body{margin:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,Hiragino Sans,Noto Sans JP,sans-serif;color:var(--fg);background:#fff}a{color:var(--accent)}header.app{display:flex;align-items:center;gap:16px;padding:12px 24px;border-bottom:1px solid var(--border);background:var(--bg)}header.app .brand{font-weight:600}header.app .spacer{flex:1}header.app nav a{margin-left:12px}main{max-width:960px;margin:0 auto;padding:24px}main.narrow{max-width:480px}h1{font-size:20px;margin:0 0 16px}h2{font-size:16px;margin:24px 0 8px}table{width:100%;border-collapse:collapse;font-size:14px}th,td{text-align:left;padding:8px;border-bottom:1px solid var(--border);vertical-align:top}th{color:var(--muted);font-weight:500}button,.btn{font:inherit;padding:8px 14px;border-radius:6px;border:1px solid var(--border);background:#fff;cursor:pointer}button.primary{background:var(--accent);color:#fff;border-color:var(--accent)}button.danger{color:var(--danger)}button:disabled{opacity:.5;cursor:default}input[type=text],input[type=email],select{font:inherit;padding:8px;border:1px solid var(--border);border-radius:6px;width:100%}label{display:block;margin:12px 0 4px;font-size:14px;color:var(--muted)}.row{display:flex;gap:8px;align-items:center}.card{border:1px solid var(--border);border-radius:8px;padding:16px;margin-bottom:12px}.card.link{display:block;text-decoration:none;color:inherit}.card.link:hover{border-color:var(--accent)}.muted{color:var(--muted);font-size:13px}.error{color:var(--danger);margin:8px 0}.ok{color:var(--ok)}.badge{display:inline-block;padding:2px 8px;border-radius:10px;font-size:12px;background:var(--bg);border:1px solid var(--border)}.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:12px}.checks label{display:inline-flex;align-items:center;gap:6px;margin:4px 12px 4px 0;color:var(--fg)}