:root{
  --max-w:1100px;
  --accent:#2b6cb0;
  --muted:#666;
  --bg:#f7fafc;
}
*{box-sizing:border-box}
body{
  margin:0;font-family:Inter,system-ui,Arial,sans-serif;background:var(--bg);color:#111;line-height:1.5}
.container{max-width:var(--max-w);margin:0 auto;padding:1rem}
.site-header{background:#fff;border-bottom:1px solid #e6edf3}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:1rem;padding:1rem 0}
.site-title{margin:0;font-size:1.25rem;color:var(--accent)}
.site-subtitle{margin:0;color:var(--muted);font-size:0.95rem}
.search-wrap input{padding:0.5rem 0.75rem;border-radius:6px;border:1px solid #d8e3ee;width:220px}
.main-grid{display:grid;grid-template-columns:220px 1fr;gap:1rem;padding:1rem 0}
.sidebar{background:#fff;border-radius:8px;padding:1rem;border:1px solid #e6edf3}
.category-list{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:.5rem}
.category-list button{background:transparent;border:0;text-align:left;padding:.35rem .5rem;border-radius:6px;cursor:pointer;color:#123}
.category-list button.active{background:var(--accent);color:#fff}
.content{min-height:60vh}
.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1rem}
.card{background:#fff;border-radius:8px;overflow:hidden;border:1px solid #e6edf3;display:flex;flex-direction:column;cursor:pointer;transition:transform .15s ease}
.card:hover{transform:translateY(-6px)}
.thumb{width:100%;height:300px;object-fit:cover;display:block}
.card-body{padding:.75rem;flex:1;display:flex;flex-direction:column}
.card-title{font-size:1rem;margin:0 0 .4rem}
.card-sub{font-size:.9rem;color:var(--muted);margin:0 0 .5rem;flex:1}
.card-meta{font-size:.82rem;color:var(--muted)}
.pagination{display:flex;gap:.5rem;align-items:center;justify-content:center;padding:1rem 0}
.page-btn{padding:.4rem .6rem;border-radius:6px;border:1px solid #dfeaf5;background:#fff;cursor:pointer}
.page-btn.active{background:var(--accent);color:#fff;border-color:var(--accent)}
.site-footer{padding:1rem 0;text-align:center;color:var(--muted);font-size:.95rem}
.back{display:inline-block;margin:.75rem 0;color:var(--accent);text-decoration:none}
.post-container{padding:1rem 0}
.post-article{background:#fff;padding:1rem;border-radius:8px;border:1px solid #e6edf3}
.post-article h2{margin-top:0}
.post-image{width:100%;height:auto;border-radius:6px;margin:1rem 0}
.post-meta{color:var(--muted);font-size:.95rem;margin:0 0 .5rem}
@media (max-width:900px){
  .main-grid{grid-template-columns:1fr}
  .grid{grid-template-columns:repeat(2,1fr)}
  .sidebar{order:2}
}
@media (max-width:600px){
  .grid{grid-template-columns:1fr}
  .search-wrap input{width:140px}
}