:root{
  --bg:#f7f9fb;
  --card:#ffffff;
  --text:#0b1a2b;
  --muted:#55657a;
  --line:#d8e0ea;
  --accent:#003366;
  --accent2:#006666;
  --shadow: 0 6px 24px rgba(0,0,0,.08);
  --radius: 16px;
}

*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Hiragino Kaku Gothic ProN", "Noto Sans JP", "Yu Gothic", sans-serif;
  color:var(--text);
  background:linear-gradient(180deg, #ffffff 0%, var(--bg) 60%);
}

a{color:var(--accent); text-decoration:none}
a:hover{text-decoration:underline}

.container{
  width:min(1100px, 92vw);
  margin:0 auto;
  padding:24px 0 56px;
}

.header{
  display:flex;
  gap:16px;
  align-items:flex-start;
  justify-content:space-between;
  padding:20px 0 12px;
}

.titleWrap h1{
  margin:0;
  font-size: clamp(20px, 2.4vw, 28px);
  letter-spacing:.02em;
}
.subtitle{
  margin:8px 0 0;
  color:var(--muted);
  line-height:1.5;
  font-size:14px;
}

.topLinks{
  display:flex;
  flex-wrap:wrap;
  justify-content:flex-end;
  gap:8px;
}
.pill{
  display:inline-flex;
  align-items:center;
  gap:8px;
  border:1px solid var(--line);
  background: #fff;
  padding:8px 12px;
  border-radius:999px;
  font-size:13px;
  box-shadow: 0 1px 0 rgba(0,0,0,.03);
}
.pill:hover{border-color:#b9c6d6}

.panel{
  background:var(--card);
  border:1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding:16px;
}

.controls{
  display:grid;
  gap:10px;
  grid-template-columns: 1.2fr .6fr .8fr auto;
  align-items:center;
}
@media (max-width: 840px){
  .header{flex-direction:column; align-items:stretch}
  .topLinks{justify-content:flex-start}
  .controls{grid-template-columns: 1fr 1fr; }
}
@media (max-width: 520px){
  .controls{grid-template-columns: 1fr; }
}

.input, .select{
  width:100%;
  padding:10px 12px;
  border-radius:12px;
  border:1px solid var(--line);
  background:#fff;
  font-size:14px;
}
.input:focus, .select:focus{outline:2px solid rgba(0,51,102,.25); border-color:#9fb2c9}

.btn{
  border:1px solid var(--line);
  background: #fff;
  padding:10px 12px;
  border-radius:12px;
  font-size:14px;
  cursor:pointer;
}
.btn:hover{border-color:#b9c6d6}
.btnPrimary{
  border-color: rgba(0,51,102,.25);
  background: rgba(0,51,102,.06);
}

.stats{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  margin-top:12px;
  color:var(--muted);
  font-size:13px;
}
.badge{
  display:inline-flex;
  align-items:center;
  gap:8px;
  border:1px dashed var(--line);
  border-radius:999px;
  padding:6px 10px;
  background: #fff;
}

.grid{
  margin-top:16px;
  display:grid;
  gap:14px;
  grid-template-columns: repeat(4, minmax(0, 1fr));
}
@media (max-width: 980px){ .grid{grid-template-columns: repeat(3, minmax(0, 1fr));} }
@media (max-width: 720px){ .grid{grid-template-columns: repeat(2, minmax(0, 1fr));} }
@media (max-width: 420px){ .grid{grid-template-columns: 1fr;} }

.card{
  overflow:hidden;
  border:1px solid var(--line);
  border-radius: 14px;
  background:#fff;
  box-shadow: 0 2px 12px rgba(0,0,0,.06);
  display:flex;
  flex-direction:column;
  min-height: 250px;
}
.thumb{
  position:relative;
  background: #f1f4f8;
  aspect-ratio: 4 / 3;
  overflow:hidden;
}
.thumb img{
  width:100%;
  height:100%;
  object-fit:cover;
  display:block;
  transition: transform .18s ease;
}
.card:hover .thumb img{transform: scale(1.03)}
.thumb .milestone{
  position:absolute;
  left:10px; top:10px;
  background: rgba(0,51,102,.88);
  color:#fff;
  padding:6px 10px;
  border-radius:999px;
  font-size:13px;
  letter-spacing:.02em;
}

.cardBody{
  padding:12px 12px 14px;
  display:flex;
  flex-direction:column;
  gap:6px;
}
.metaRow{
  display:flex;
  flex-wrap:wrap;
  gap:8px;
  align-items:center;
  color:var(--muted);
  font-size:13px;
}
.author{
  color:var(--accent2);
  font-weight:600;
}
.cardActions{
  margin-top:auto;
  display:flex;
  gap:8px;
  padding-top:8px;
}
.smallBtn{
  flex:1;
  text-align:center;
  padding:9px 10px;
  border-radius:12px;
  border:1px solid var(--line);
  background:#fff;
  font-size:13px;
}
.smallBtn:hover{border-color:#b9c6d6}
.smallBtn.primary{
  border-color: rgba(0,51,102,.25);
  background: rgba(0,51,102,.06);
}

.notice{
  margin-top:16px;
  color:var(--muted);
  font-size:13px;
  line-height:1.6;
}

details{
  margin-top:18px;
}
details > summary{
  cursor:pointer;
  user-select:none;
  font-weight:700;
  color:var(--accent);
  padding:10px 0;
}
.codeLike{
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
  font-size: 12.5px;
  background:#0b1220;
  color:#d9e6ff;
  padding:12px;
  border-radius:14px;
  overflow:auto;
  line-height:1.5;
}
.footer{
  margin-top:28px;
  color:var(--muted);
  font-size:12px;
  text-align:center;
}