*{
  box-sizing:border-box;
  margin:0;
  padding:0;
}

body{
  font-family:Arial,"Noto Sans Bengali",sans-serif;
  background:#f0f2f5;
  color:#1c1e21;
  line-height:1.7;
}

a{
  color:#1877f2;
  text-decoration:none;
}

.top{
  background:#fff;
  border-bottom:1px solid #ddd;
  position:sticky;
  top:0;
  z-index:10;
}

.nav{
  max-width:900px;
  margin:auto;
  padding:14px 18px;
  display:flex;
  align-items:center;
  justify-content:space-between;
}

.logo{
  font-size:22px;
  font-weight:800;
  color:#1877f2;
}

.links{
  display:flex;
  gap:18px;
  flex-wrap:wrap;
}

.links a{
  font-weight:700;
}

.hero{
  background:linear-gradient(135deg,#1877f2,#6a5cff);
  color:white;
  text-align:center;
  padding:45px 18px 35px;
}

.avatar{
  width:120px;
  height:120px;
  border-radius:50%;
  object-fit:cover;
  border:5px solid white;
  box-shadow:0 4px 15px #0003;
}

.hero h1{
  font-size:34px;
  margin-top:12px;
}

.hero p{
  font-size:17px;
  opacity:.95;
}

.buttons{
  display:flex;
  justify-content:center;
  gap:10px;
  margin-top:20px;
  flex-wrap:wrap;
}

.btn{
  padding:11px 20px;
  border-radius:10px;
  font-weight:700;
  background:#fff;
  color:#1877f2;
}

.btn.red{
  background:#ff0000;
  color:#fff;
}

.container{
  max-width:900px;
  margin:18px auto;
  padding:0 14px;
}

.card{
  background:#fff;
  border-radius:15px;
  padding:24px;
  margin-bottom:16px;
  box-shadow:0 2px 10px #00000010;
}

.card h2{
  margin-bottom:12px;
  font-size:24px;
}

.card p{
  color:#555;
  margin-bottom:10px;
}

.post{
  border-top:1px solid #eee;
  padding:18px 0;
}

.post:first-child{
  border-top:0;
}

.adbox{
  min-height:110px;
  border:1px dashed #b7bcc3;
  background:#fafafa;
  border-radius:12px;
  display:flex;
  align-items:center;
  justify-content:center;
  color:#777;
  text-align:center;
  padding:15px;
  margin:16px 0;
}

footer{
  background:#fff;
  border-top:1px solid #ddd;
  text-align:center;
  padding:28px 15px;
  color:#666;
}

footer .links{
  justify-content:center;
  margin-bottom:10px;
}

ul{
  padding-left:22px;
}

@media(max-width:650px){

  .nav{
    align-items:flex-start;
    gap:10px;
    flex-direction:column;
  }

  .links{
    gap:12px;
  }

  .hero h1{
    font-size:29px;
  }

  .container{
    padding:0 10px;
  }
}