body {
  font-family: Arial, sans-serif;
  background: lavenderblush;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
}

.container {
  background: white;
  width: 350px;
  padding: 20px;
  border-radius: 12px;
  text-align: center;
  box-shadow: 0 4px 12px rgba(0,0,0,0.1);
  linear-gradient(white 1px, transparent 1px),
linear-gradient(90deg, white 1px, transparent 1px);
}

#nut {
  width: 100%;
  margin: 6px 0;
  padding: 10px;
  border-radius: 6px;
  border: none;
  cursor: pointer;
  background: #d5e8ff;
  transition: .2s;
  border-color: pink;

}

#nut :hover { background: #b6d5ff; }

#Tien {
    display:none; 
    position:fixed; 
    background:#d5e8ff;
    color:#fff;
    text-align:center;
    padding-top:100px;
}
    #Tien:hover { background: #b6d5ff; }