* {
  box-sizing: border-box;
}

html {
  overflow-x: hidden;
}

body {
  background-color: rgb(61, 62, 131);
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  overflow: hidden;
  margin: 0;
}

.empty {
  width: 10rem;
  height: 10rem;
  margin: 0.6rem;
  border: 3px solid #000;
  background-color: #fff;
}

.fill {
  width: 100%;
  height: 100%;
  background-image: url('https://images.unsplash.com/photo-1494256997604-768d1f608cac?ixid=MXwxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHw%3D&ixlib=rb-1.2.1&auto=format&fit=crop&w=1401&q=80');
  background-position: center center;
  background-size: cover;
  cursor: pointer;
}

.hold {
  border: 5px solid #ccc;
}

.hovered {
  background-color: #333;
  border-color: #fff;
  border-style: dashed;
}

@media (max-width: 767px) {
  body {
    flex-direction: column;
  }

  html {
    font-size: 11px;
  }
}

@media (max-width: 420px) {
  html {
    font-size: 8px;
  }
}