body {   
    margin: 0;             
    background: linear-gradient(135deg, #FFC0CB, #FF69B4, #FF1493, #FF69B4, #FFC0CB); 
    background-size: 400% 400%; 
    animation: gradientAnimation 15s ease infinite;  
    font-family: sans-serif;
    font-size: 25px;
    font-weight: bold;
    text-align: center;               
}
body.dark-mode {
  background: black;
  color: white;
  border: 2px solid hotpink;   
}

#theme-toggle {
  background: rgb(61, 59, 59);
  color: hotpink;
  border-radius: 5%;
  border: 1px solid hotpink; 
  padding: 5px 15px;
  box-shadow: 0 8px 16px 0 rgba(0,0,0,0.2), 0 6px 20px 0 rgba(0,0,0,0.19); 
  margin-left: 700px; 
  margin-top: 10px;  
  cursor: pointer;
}

@keyframes gradientAnimation {
    0% {
      background-position: 0% 50%;
    }
    50% {
      background-position: 100% 50%;
    }
    100% {
      background-position: 0% 50%;
    }
}
h1 {
    color:rgb(199, 88, 107);
    text-shadow: 2px 2px whitesmoke;
    margin: 15px;
    margin-bottom: 10px;
}
h2 {
    font-size: 45px;
    margin-top: 0;
    color: blanchedalmond;
    text-shadow: 2px 2px rgb(199, 88, 107);   
}
.counter {
    background-image: url("https://images.unsplash.com/photo-1511275539165-cc46b1ee89bf?ixlib=rb-4.0.3&ixid=MnwxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8&auto=format&fit=crop&w=870&q=80");
    width: 850px;
    height: 450px;
    border: 2px solid black;
    margin-left: 200px;
    margin-top: 15px;    
} 
.message {
    color: #FF1493; 
    font-size: 36px; 
    font-weight: bold; 
    animation: bounce 1s ease infinite; 
  }
  
  @keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
      transform: translateY(0);
    }
    40% {
      transform: translateY(-10px);
    }
    60% {
      transform: translateY(-5px);
    }
  } 

.button {
    border: none;
    padding-top: 10px;
    padding-bottom: 10px;
    color: white;
    font-size:25px;
    font-weight: bold;
    width: 200px;
    margin-bottom: 5px;
    margin-top: 5px; 
    cursor: pointer;   
}
#add, #subtract, #reset {
    box-shadow: 0 8px 16px 0 rgba(0,0,0,0.2), 0 6px 20px 0 rgba(0,0,0,0.19);
}
#add {
    background: rgb(237, 123, 159);
    border: 2px solid  rgb(61, 59, 59);
}
#subtract{
    background: rgb(61, 59, 59);
    border: 2px solid  rgb(237, 123, 159);
}
#reset {
    background: rgb(200, 190, 190);
    color: rgb(51, 42, 42);    
}
#dev-info {
  font-size: 15px;
}
/*Responsiveness*/

@media only screen and (max-width:800px) {
  /* For tablets: */
  .counter{
    width: 400px;
    height: 250px;
    background-size: cover;
    margin-right: 200px;
  }
  .counter-app {
      display: flex;
      flex-direction: column;
      justify-content: center;
      align-items: center;
      height: 100vh;
  }    
  .button-container {
    width: 80%;
    display: flex;
    flex-direction: row;
    justify-content: space-evenly;
    align-self: center;
    
  }
}
@media only screen and (max-width:500px) {
  /* For mobile phones: */

  .counter-app {
      display: flex;
      flex-direction: column;
      justify-content: center;
      align-items: center; 
      height: 100vh;       
  }   
  .counter {        
      display: flex;
      flex-direction: column;        
      justify-content: center;        
      font-size: 20px;
  }    
  .button-container {
    display: flex;
    flex-direction: row;      
    justify-content: center;
    align-items: center;
  }
}