:root{
  --bg:#f3f6fb;
  --card:#ffffff;
  --primary:#2563eb;
  --text:#1f2937;
  --muted:#6b7280;
}

*{box-sizing:border-box}

body{
  margin:0;
  font-family:Poppins,sans-serif;
  background:linear-gradient(180deg,#eef3ff,var(--bg));
  padding:30px 15px;
  color:var(--text);
}

.article{
  max-width:820px;
  margin:auto;
  background:var(--card);
  padding:40px;
  border-radius:20px;
  box-shadow:0 18px 45px rgba(0,0,0,.08);
}

.article h1{
  font-size:34px;
  margin-bottom:12px;
}

.meta{
  font-size:14px;
  color:var(--muted);
  margin-bottom:30px;
}

.article h2{
  font-size:22px;
  margin:35px 0 15px;
}

.article p{
  font-size:16px;
  line-height:1.9;
  margin-bottom:18px;
  text-align:justify;
}

.back{
  display:inline-block;
  margin-top:40px;
  font-weight:600;
  color:var(--primary);
  text-decoration:none;
}

footer{
  margin-top:50px;
  text-align:center;
  font-size:13px;
  color:var(--muted);
}