:root{
  --bg:#ffffff;
  --fg:#111827;
  --muted:#6b7280;
  --accent:#0ea5a4;
  --card:#f8fafc;
}
[data-theme="dark"]{
  --bg:#0b1220;
  --fg:#e6eef6;
  --muted:#9ca3af;
  --accent:#34d399;
  --card:#071021;
}
*{box-sizing:border-box}
body{font-family:Inter,system-ui,Segoe UI,Roboto,Arial,sans-serif;background:var(--bg);color:var(--fg);margin:0;line-height:1.6}
.container{max-width:820px;margin:36px auto;padding:20px}
.post{background:var(--card);border-radius:12px;padding:26px;box-shadow:0 6px 18px rgba(10,20,30,0.06)}
h1{font-size:1.6rem;margin:0 0 8px}
h2{font-size:1.05rem;margin-top:18px}
.meta{color:var(--muted);font-size:0.9rem}
.intro p{font-size:1.02rem}
a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline}
.btn{background:none;border:1px solid var(--muted);padding:8px 12px;border-radius:8px;cursor:pointer}
.btn.tiny{padding:6px 8px;font-size:0.85rem}
.cta{margin-top:20px;padding:14px;border-radius:10px;background:linear-gradient(180deg,rgba(14,165,164,0.06),transparent)}
.actions{margin-top:10px}
.small{color:var(--muted);font-size:0.9rem}