:root{
  --bg:#f5f6f8; --card:#fff; --ink:#1f2430; --muted:#6b7280;
  --line:#e5e7eb; --brand:#2563eb; --brand-d:#1d4ed8; --danger:#dc2626;
  --low:#fff7ed; --low-bd:#f59e0b; --ok:#065f46; --ok-bg:#ecfdf5; --err-bg:#fef2f2;
}
*{box-sizing:border-box}
body{margin:0;font-family:system-ui,"Hiragino Kaku Gothic ProN","Noto Sans JP",sans-serif;background:var(--bg);color:var(--ink);line-height:1.6}
a{color:var(--brand);text-decoration:none}
a:hover{text-decoration:underline}
.container{max-width:960px;margin:0 auto;padding:20px 16px 60px}
.topbar{display:flex;align-items:center;justify-content:space-between;background:#fff;border-bottom:1px solid var(--line);padding:10px 16px;position:sticky;top:0;z-index:10}
.brand{font-weight:700;font-size:1.1rem}
.topbar nav{display:flex;gap:14px;align-items:center}
.footer{text-align:center;color:var(--muted);padding:24px}
h1{font-size:1.5rem;margin:.2em 0 .6em}
h2{font-size:1.1rem;margin:.2em 0 .6em}
.muted{color:var(--muted)}
.small{font-size:.85rem}
.hint{color:var(--muted);font-size:.85rem}
.card{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:16px;margin-bottom:16px}
.auth{max-width:440px;margin:24px auto}
.btn{display:inline-block;border:1px solid var(--line);background:#fff;color:var(--ink);padding:8px 14px;border-radius:8px;cursor:pointer;font-size:.95rem}
.btn:hover{background:#f3f4f6;text-decoration:none}
.btn.primary{background:var(--brand);border-color:var(--brand);color:#fff}
.btn.primary:hover{background:var(--brand-d)}
.btn.danger{border-color:var(--danger);color:var(--danger)}
.btn.danger:hover{background:var(--err-bg)}
.btn.small{padding:4px 10px;font-size:.85rem}
.linklike{background:none;border:none;color:var(--brand);cursor:pointer;font:inherit;padding:0}
.inline{display:inline}
.actions{display:flex;gap:10px;margin-top:14px;flex-wrap:wrap}
.alert{padding:10px 12px;border-radius:8px;margin:10px 0}
.alert.error{background:var(--err-bg);color:var(--danger)}
.alert.ok{background:var(--ok-bg);color:var(--ok)}
label{display:block;margin:10px 0}
label>span{display:block;font-size:.85rem;color:var(--muted);margin-bottom:2px}
input[type=text],input[type=email],input[type=password],input[type=search],select,textarea{
  width:100%;padding:8px 10px;border:1px solid var(--line);border-radius:8px;font:inherit;background:#fff}
textarea{resize:vertical}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:0 16px}
@media(max-width:640px){.grid2{grid-template-columns:1fr}}
.field.low input,.field.low textarea{background:var(--low);border-color:var(--low-bd)}
.tiles{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
@media(max-width:640px){.tiles{grid-template-columns:1fr}}
.tile{display:flex;flex-direction:column;gap:6px;background:#fff;border:1px solid var(--line);border-radius:12px;padding:20px;text-align:center;color:var(--ink)}
.tile:hover{border-color:var(--brand);text-decoration:none;box-shadow:0 2px 10px rgba(0,0,0,.05)}
.tile-icon{font-size:2rem}
.tile-title{font-weight:700}
.tile-desc{color:var(--muted);font-size:.85rem}
.img-inputs{display:grid;grid-template-columns:1fr 1fr;gap:16px}
@media(max-width:640px){.img-inputs{grid-template-columns:1fr}}
.preview{max-width:100%;border:1px solid var(--line);border-radius:8px;margin-top:8px}
.searchbar{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:12px}
.searchbar input[type=search]{flex:1;min-width:220px}
.searchbar select{width:auto}
table.list{width:100%;border-collapse:collapse;background:#fff;border:1px solid var(--line);border-radius:8px;overflow:hidden}
table.list th,table.list td{text-align:left;padding:8px 10px;border-bottom:1px solid var(--line)}
table.list thead th{background:#f9fafb;font-size:.8rem;color:var(--muted)}
table.list tbody tr{cursor:pointer}
table.list tbody tr:hover{background:#f9fafb}
.tag{display:inline-block;background:#eef2ff;color:var(--brand-d);border-radius:999px;padding:2px 10px;font-size:.8rem}
.pager{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-top:14px}
.empty{color:var(--muted);padding:30px;text-align:center}
.detail-head{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:10px}
.detail-grid{display:grid;grid-template-columns:1fr 320px;gap:20px}
@media(max-width:760px){.detail-grid{grid-template-columns:1fr}}
dl.fields{display:grid;grid-template-columns:auto 1fr;gap:6px 16px;margin:0}
dl.fields dt{color:var(--muted);font-size:.85rem}
dl.fields dd{margin:0;word-break:break-all}
.images figure{margin:0 0 12px}
.images img{max-width:100%;border:1px solid var(--line);border-radius:8px}
.images figcaption{font-size:.8rem;color:var(--muted);margin-bottom:4px}
.codes{columns:2;list-style:none;padding:0}
.codes code{font-size:1rem}
.stack label{margin:8px 0}
.row{display:flex;gap:8px;align-items:center;flex-wrap:wrap;margin-top:8px}
.cat-list,.user-list{list-style:none;padding:0}
.user-list li{display:flex;justify-content:space-between;align-items:center;padding:6px 0;border-bottom:1px solid var(--line)}