:root{
  --bg: #ffffff;
  --fg: #1f2937;
  --muted:#6b7280;
  --accent:#0ea5e9;
  --card:#f8fafc;
  --border:#e5e7eb;
}
@media (prefers-color-scheme: dark){
  :root{
    --bg:#0b0f14;
    --fg:#e5e7eb;
    --muted:#9ca3af;
    --accent:#38bdf8;
    --card:#111827;
    --border:#1f2937;
  }
}
*{box-sizing:border-box}
html{font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji","Segoe UI Emoji";}
body{margin:0; background:var(--bg); color:var(--fg); line-height:1.6}
.container{max-width:860px; margin:0 auto; padding:32px 20px}
.header{display:flex; gap:20px; align-items:center; margin-bottom:28px}
.avatar{width:84px; height:84px; border-radius:50%; border:1px solid var(--border); object-fit:cover; display:block;}
.title{margin:0; font-size:clamp(26px, 3.2vw, 36px); letter-spacing:-0.02em}
.tagline{margin:4px 0 0; color:var(--muted)}
.badge{display:inline-block; padding:4px 10px; border:1px solid var(--border); border-radius:999px; background:var(--card); font-size:12px; color:var(--muted)}
.nav{display:flex; gap:14px; flex-wrap:wrap; margin-top:10px}
.nav a{color:var(--muted); text-decoration:none}
.nav a:hover{color:var(--fg); text-decoration:underline}
.section{margin:36px 0}
.card{border:1px solid var(--border); background:var(--card); border-radius:16px; padding:18px}
.list{list-style:none; padding:0; margin:0}
.list li{padding:14px 0; border-bottom:1px dashed var(--border)}
.list li:last-child{border-bottom:none}
.list a{color:var(--fg); text-decoration:none}
.list a:hover{text-decoration:underline; color:var(--accent)}
.meta{color:var(--muted); font-size:14px}
.footer{margin-top:40px; font-size:14px; color:var(--muted)}
.btn{display:inline-flex; align-items:center; gap:8px; padding:10px 14px; border-radius:12px; border:1px solid var(--border); background:var(--card); color:var(--fg); text-decoration:none}
.btn:hover{border-color:var(--accent)}
.grid{display:grid; grid-template-columns:1fr; gap:14px}
@media (min-width:640px){ .grid{grid-template-columns:1fr 1fr} }

.post-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}
@media (min-width:640px) {
  .post-grid { grid-template-columns: 1fr 1fr 1fr; }
}
.post-card {
  display: block;
  border-radius: 16px;
  overflow: hidden;
  text-decoration: none;
  color: var(--fg);
  background: var(--card);
  border: 1px solid var(--border);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.post-card img {
  width: 100%;
  height: 180px;
  object-fit: cover;
}
.post-content {
  padding: 14px 16px 20px 16px;
}
.post-content h3 {
  margin: 0 0 6px 0;
  font-size: 18px;
}
.post-content p {
  color: var(--muted);
  font-size: 15px;
}
.post-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 6px 18px rgba(0,0,0,0.08);
}