* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
  background: #f6f7fb;
  color: #111;
}

.topbar{
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding:16px 24px;
  background:#ffffff;
  border-bottom:1px solid #e7e7e7;
}

.brand{
  font-weight:700;
  font-size:18px;
}

.menu a{
  margin-left:14px;
  text-decoration:none;
  color:#111;
  padding:8px 10px;
  border-radius:8px;
}

.menu a:hover{
  background:#f0f0f0;
}

.container{
  max-width:900px;
  margin:40px auto;
  background:#fff;
  padding:28px;
  border-radius:14px;
  border:1px solid #eee;
}

.footer{
  text-align:center;
  padding:18px;
  color:#666;
}