* {
  box-sizing: border-box;
  padding: 0;
  margin: 0;
}
.options li {
  width: 30vmin;
  height: 30vmin;
  list-style: none;
  border-radius: 50%;
  margin-top: 10vmin;
  cursor: pointer;
  transition: all 200ms ease;
  box-shadow: 0 4px 20px rgba(0,0,0,0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  background: #000;
}
.options li:hover {
  transform: scale(1.05);
}
.options li svg {
  width: 30%;
  filter: drop-shadow(0px 0px 10px rgba(0,0,0,0.2));
}
.options li [href='#check'],
.options li [href='#cross'] {
  animation: enter 200ms ease-out;
  display: none;
}
.options li.correct [href='#check'] {
  display: block;
}
.options li.wrong [href='#cross'] {
  display: block;
}
h1 {
  text-align: center;
  font-size: 6vmin;
  font-weight: normal;
  margin-bottom: 5vmin;
}
.level {
  margin-bottom: 2vmin;
  font-size: 4vmin;
}
.diff {
  font-size: 3vmin;
}
body,
html {
  height: 100%;
}
body {
  display: grid;
  justify-content: center;
  align-items: center;
  box-sizing: border-box;
  font-family: Inter, Arial, sans-serif;
  text-align: center;
  background: #eee;
}
.options {
  display: grid;
  grid-template-columns: 1fr 1fr;
  grid-gap: 10vmin;
}
#result-container {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  background: #fff;
  box-shadow: 0 8px 20px rgba(0,0,0,0.15);
  padding: 5vmin;
  border-radius: 2vmin;
  font-size: 3vmin;
  line-height: 1.5;
  width: 90%;
  max-width: 700px;
  animation: pop-in 300ms ease;
}
#result-container h1 {
  font-size: 4vmin;
  letter-spacing: 0.05em;
}
#result-container p {
  font-size: 3vmin;
  margin-bottom: 7vmin;
}
#result-container button {
  font-family: Inter, Arial, sans-serif;
  padding: 2vmin;
  background: #eee;
  color: #000;
  border: none;
  border-radius: 5px;
  min-width: 200px;
  cursor: pointer;
  letter-spacing: 0.1em;
  box-shadow: 0px 2px 3px rgba(0,0,0,0.2);
  transition: all 200ms ease;
}
#result-container button:hover {
  transform: scale(1.1);
}
.container.blur {
  filter: blur(20px);
  pointer-events: none;
}
#result {
  font-size: 1.2em;
  vertical-align: center;
}
@-moz-keyframes enter {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}
@-webkit-keyframes enter {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}
@-o-keyframes enter {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}
@keyframes enter {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}
@-moz-keyframes pop-in {
  from {
    opacity: 0;
    transform: translate(-50%, -50%) scale(0.8);
  }
  to {
    opacity: 1;
    transform: translate(-50%, -50%);
  }
}
@-webkit-keyframes pop-in {
  from {
    opacity: 0;
    transform: translate(-50%, -50%) scale(0.8);
  }
  to {
    opacity: 1;
    transform: translate(-50%, -50%);
  }
}
@-o-keyframes pop-in {
  from {
    opacity: 0;
    transform: translate(-50%, -50%) scale(0.8);
  }
  to {
    opacity: 1;
    transform: translate(-50%, -50%);
  }
}
@keyframes pop-in {
  from {
    opacity: 0;
    transform: translate(-50%, -50%) scale(0.8);
  }
  to {
    opacity: 1;
    transform: translate(-50%, -50%);
  }
}