body{
  background-color:#000;
  width:100%;
  
}

#container {
      max-width: 90%;
      margin: auto;
      background-color: #fff;
      border-radius: 45px;
      border-color: #0f0;
      text-align: center;
      heigh:500px;
    }
    
#container h1{
    color: #000;
}

h1{
   color:#fff; 
}

.button{
  border-radius:25px;
  border-color:#fff;
  width:50px;
  background-color: #2E629E;
}

.footer{
      position: fixed;
      left: 0;
      bottom: 0;
      width: 100%;
      text-align: center;
      padding: 1rem;
      font-size: 0.9rem;
      background: var(--card-bg);
      color: var(--text-color);
}

.footer a{
 text-decoration: none;
 font-size: x-large;
 color: #fff;
}