* {
  box-sizing: border-box;
}
body {
  font-family: sans-serif;
}
.box-container {
  background: #ccc;
  padding: 1em;
  display: inline-block;
  vertical-align: top;
}

.obraz_box {
  width: 50px;
  height: 50px;
}

.box {
  display: inline-block;
  vertical-align: top;
  width: 60px;
  height: 60px;
  background: #ffffff;
  color: #fff;
  font-size: 2em;
  text-align: center;
  transition: transform 0.15s ease;
  border-radius: 50%;
  padding-top: 0.3em;
}

.box.correct {
  background: green;
}

.box.incorrect {
  background: red;
}

.box.ui-draggable-dragging {
  box-shadow: 10px 20px 30px rgba(0,0,0,0.5);
  transform: scale(2);
}

.droparea {
  background: yellow;
  width: 400px;
  height: 200px;
  display: inline-block;
  vertical-align: top;
  text-align: center;
}

.score-container {
  display: inline-block;
  vertical-align: top;
  border: 3px solid #000;
  font-size: 2em;
  padding: 1em;
}