:root{
  --b:#e5e7eb;
  --t:#111827;
  --s:#6b7280;
  --bg:#f9fafb;
  --w:#ffffff;
}

*{ box-sizing:border-box; }

body{
  margin:0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Noto Sans JP", sans-serif;
  color:var(--t);
  background:var(--bg);
}

.wrap{
  max-width: 960px;
  margin: 0 auto;
  padding: 18px;
}

.siteHeader{
  background: var(--bg);
  border-bottom: 1px solid var(--b);
}

.brand{
  display:flex;
  flex-direction:column;
  gap:2px;
}

.brandTitle{
  font-weight: 800;
  font-size: 14px;
  letter-spacing: .02em;
}

.brandSub{
  color: var(--s);
  font-size: 12px;
  line-height: 1.5;
}

.card{
  background:var(--w);
  border:1px solid var(--b);
  border-radius:14px;
  padding:16px;
}

.h1{
  font-size: 20px;
  margin: 0 0 8px;
  line-height: 1.3;
}

.lead{
  margin: 0;
  line-height: 1.6;
  font-size: 14px;
}

.lead + .lead{ margin-top: 6px; }

.muted{ color: var(--s); }
.small{ font-size:12px; color:var(--s); line-height:1.6; }

.section{ margin-top:14px; }

.hr{
  height:1px;
  background:var(--b);
  margin:14px 0;
}

.tabs{
  display:flex;
  gap:8px;
  margin-top: 14px;
  flex-wrap: wrap;
}

.tab{
  border:1px solid var(--b);
  background:#fff;
  color:var(--t);
  padding: 8px 12px;
  border-radius: 999px;
  font-size: 13px;
  cursor:pointer;
}

.tab.active{
  background:#111827;
  color:#fff;
  border-color:#111827;
}

.row{
  display:flex;
  gap:10px;
  margin-top: 12px;
  flex-wrap:wrap;
  align-items:center;
}

input[type="text"], input[type="number"], select{
  padding: 12px 12px;
  border: 1px solid var(--b);
  border-radius: 12px;
  font-size: 16px;
  background:#fff;
}

input[type="text"]{
  flex: 1;
  min-width: 240px;
}

button{
  padding: 12px 14px;
  border: 1px solid var(--b);
  border-radius: 12px;
  font-size: 16px;
  background:#111827;
  color:#fff;
  cursor:pointer;
}

button.secondary{
  background:#fff;
  color:#111827;
}

button:disabled{
  opacity: .6;
  cursor: not-allowed;
}

.hint{
  font-size: 12px;
  color: var(--s);
  margin-top: 8px;
  line-height: 1.6;
}

.pill{
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-size: 12px;
  padding: 4px 10px;
  border-radius: 999px;
  border: 1px solid var(--b);
  background: #fff;
}
.pill.ok{ border-color:#c7d2fe; background:#eef2ff; }
.pill.warn{ border-color:#fde68a; background:#fffbeb; }
.pill.bad{ border-color:#fecaca; background:#fef2f2; }

.title{
  font-size: 18px;
  margin: 8px 0 2px;
  font-weight: 700;
  line-height: 1.35;
}
.author{ margin: 0; color: var(--s); }

.scoreWrap{
  display:flex;
  align-items: baseline;
  gap:10px;
  margin-top: 10px;
}
.score{ font-size: 34px; font-weight: 800; }
.scoreSub{ font-size: 12px; color: var(--s); }

.grid{
  display:grid;
  grid-template-columns: repeat(2, minmax(0,1fr));
  gap:10px;
  margin-top: 12px;
}
@media (min-width: 680px){
  .grid{ grid-template-columns: repeat(4, minmax(0,1fr)); }
}

.kv{
  border:1px solid var(--b);
  border-radius: 12px;
  padding: 10px;
  background: #fff;
}
.k{ font-size: 12px; color: var(--s); margin: 0 0 4px; }
.v{ font-size: 14px; margin: 0; font-weight: 600; }

.panel{
  margin-top: 10px;
  padding: 12px;
  border: 1px solid var(--b);
  border-radius: 12px;
  background:#fff;
}

.errorBox{
  border:1px solid #fecaca;
  background:#fef2f2;
  border-radius: 12px;
  padding: 12px;
}
.warnBox{
  border:1px solid #fde68a;
  background:#fffbeb;
  border-radius: 12px;
  padding: 12px;
}
.okBox{
  border:1px solid #c7d2fe;
  background:#eef2ff;
  border-radius: 12px;
  padding: 12px;
}
.errTitle{ font-weight: 800; margin: 0 0 4px; }
.errTitle.err{ color:#991b1b; }
.errTitle.warn{ color:#92400e; }
.errText{ margin: 0; }
.errText.err{ color:#7f1d1d; }
.errText.warn{ color:#78350f; }

.formGrid{
  display:grid;
  grid-template-columns: 1fr;
  gap:10px;
}
@media (min-width: 860px){
  .formGrid{ grid-template-columns: 1fr 1fr 1fr; }
}

.field label{
  display:block;
  font-size: 12px;
  color: var(--s);
  margin-bottom: 6px;
}

.list{
  margin-top: 12px;
  display:grid;
  grid-template-columns: 1fr;
  gap:10px;
}
@media (min-width: 860px){
  .list{ grid-template-columns: 1fr 1fr; }
}

.item{
  border:1px solid var(--b);
  border-radius: 12px;
  padding: 12px;
  background:#fff;
  cursor:pointer;
}
.item:hover{ border-color:#cbd5e1; }

.itemTop{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:10px;
}
.itemTitle{
  margin: 6px 0 0;
  font-weight: 750;
  line-height:1.35;
}
.itemMeta{
  margin: 2px 0 0;
  color: var(--s);
  font-size: 12px;
}
.itemScore{
  font-weight: 850;
  font-size: 20px;
}

.siteFooter{
  border-top: 1px solid var(--b);
  background: var(--bg);
}

.footerRow{
  display:flex;
  align-items:center;
  gap:10px;
  flex-wrap:wrap;
}

.footerLink{
  color:#111827;
  text-decoration:none;
  border:1px solid var(--b);
  background:#fff;
  padding: 8px 12px;
  border-radius: 999px;
  font-size: 12px;
}
.footerLink:hover{
  border-color:#cbd5e1;
}

.footerSep{
  color: var(--s);
  font-size: 12px;
}

.footerNote{
  margin-top: 10px;
  color: var(--s);
  font-size: 12px;
  line-height: 1.6;
}

/* SR-only (accessibility) */
.srOnly{
  position:absolute !important;
  width:1px; height:1px;
  padding:0; margin:-1px;
  overflow:hidden; clip:rect(0,0,0,0);
  white-space:nowrap; border:0;
}