@import url('https://fonts.googleapis.com/css2?family=Luckiest+Guy&display=swap');

* {
  padding: 0;
  margin: 0;
}

body {
  padding: 0%;
  font-family: 'Luckiest Guy', cursive;
  background-color: #E6E6EA;
}

header {
  background: #1c8f05;
}

.container {
  width: 95%;
  margin: auto;
}

.nav {
  overflow: hidden;
  background: #1c8f05;
  color: #fff;
  padding: 15px 0;
}

.nav h2 {
  font-size: 2rem;
  float: left;
}

nav {
  float: right;
}

nav ul {
  list-style-type: none;
}

nav li {
  font-size: 1.3rem;
  margin-top: 5px;
  float: left;
  padding: 0 15px;
}

nav a {
  text-decoration: none;
  color: #fff;
}

.current a::after {
  content: '-';
  font-size: 4px;
  background-color: white;
  display: block;
}

.wrapper {
  display: grid;
  grid-template-columns: 82% 18%;
}

.equation {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  box-shadow: 2px 2px 6px 0px rgba(0, 0, 0, 0.9);
  font-size: 5.2vw;
  background: #fff;
  border-radius: 3px;
  text-align: center;
  margin: 5px 10px 0px 5px;
}

.equation h1 {
  display: inline;
  padding: 20px;
}

.score {
  display: flex;
  margin-top: 2%;
}

.btn {
  background: #3498db;
  margin-right: 10px;
  margin-right: 10px;
  margin-top: 20px;
  background-image: -webkit-linear-gradient(top, #3498db, #2980b9);
  background-image: -moz-linear-gradient(top, #3498db, #2980b9);
  background-image: -ms-linear-gradient(top, #3498db, #2980b9);
  background-image: -o-linear-gradient(top, #3498db, #2980b9);
  background-image: linear-gradient(to bottom, #3498db, #2980b9);
  -webkit-border-radius: 57;
  -moz-border-radius: 57;
  border-radius: 57px;
  font-family: Courier New;
  font-weight: bold;
  color: #ffffff;
  font-size: 42px;
  padding: 10px 20px 10px 20px;
  text-decoration: none;
}

.btn:hover {
  background: #3cb0fd;
  background-image: -webkit-linear-gradient(top, #3cb0fd, #3498db);
  background-image: -moz-linear-gradient(top, #3cb0fd, #3498db);
  background-image: -ms-linear-gradient(top, #3cb0fd, #3498db);
  background-image: -o-linear-gradient(top, #3cb0fd, #3498db);
  background-image: linear-gradient(to bottom, #3cb0fd, #3498db);
  text-decoration: none;
}

.answer-options {
  font-size: 5.2vw;
  margin-right: 10px;
}

.options {
  display: flex;
  justify-content: center;
  align-items: center;
  cursor: pointer;
  border-radius: 3px;
  margin-top: 3px;
  margin-bottom: 3px;
  color: #fff;
  transition: 1s;
  box-shadow: 2px 2px 6px 0px rgba(0, 0, 0, 0.9);
}

@media(max-width:768px) {
  .nav h2 {
    font-size: 1.5rem;
    float: none;
    text-align: center;
  }

  nav {
    float: none;
    display: flex;
    justify-content: center;
  }

  nav li {
    font-size: 1rem;
  }
}

@media(max-width:480px) {
  .nav h2 {
    float: none;
    text-align: center;
  }

  .equation h1 {
    display: inline;
    padding: 10px;
  }

  nav li {
    font-size: .8rem;
  }

}

.try_again {
  color: red;
  font-weight: lighter;
}

.hidden {
  display: none;
}