* {
    margin: 0;
    padding: 0;
  }
  body {
    background: url(./img/wp2757874.gif);
    background-size: cover;
    font-family: 'Mate SC', serif !important;
    transition: all 0.5s;
  }
  .container {
    width: 100vw;
    height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: space-evenly;
    align-items: center;
    color: #fff;
  }
  #grid {
    width: 90%;
    height: 85%;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    grid-gap: 10px;
  }
  
  .flip-card {
    background-color: transparent;
    perspective: 1000px;
  }
  
  .flip-inner {
    position: relative;
    width: 100%;
    height: 100%;
    text-align: center;
    transition: transform 0.2s;
    transform-style: preserve-3d;
  }
  
  .front,
  .back {
    position: absolute;
    width: 100%;
    height: 100%;
    -webkit-backface-visibility: hidden;
    backface-visibility: hidden;
    background: rgba(255, 255, 255, 0.1);
    box-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.37);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    border-radius: 10px;
    border: 1px solid rgba(255, 255, 255, 0.18);
  }
  
  .back {
    color: white;
    transform: rotateY(180deg);
    display: flex;
    justify-content: center;
    align-items: center;
  }
  .flipped {
    transform: rotateY(180deg);
  }

  .popup {
    height: 100vh;
    width: 100vw;
    display: flex;
    justify-content: center;
    align-items: center;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    display: none;
  }
  .popup > div {
    width: 300px;
    height: 200px;
    background-color: #fff;
    border-radius: 10px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
  }
  @media (max-width: 600px) {
    h2 {
      font-size: 1rem !important;
    }
  }
  
  #reload{
    border: 0;
    background-color: #f13637;
    height: 40px;
    width: 40px;
    border-radius: 10px;
    color: #fff;
    vertical-align: middle;
    font-size: 1.2rem !important;
    margin: 10px 0;
  }
  #reload:active, #reload:focus{
    outline: none;
  }