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

* {
  padding: 0;
  margin: 0;
}

body {
  font-family: "Luckiest Guy", cursive;
  background-color: #e6e6ea;
}

header {
  background: #495ffe;
}

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

.nav {
  overflow: hidden;
  background: #495ffe;
  color: #fff;
  height: 12vh;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.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 {
  height: 84vh;
  padding: 2vh;
  display: grid;
  grid-template-columns: 80% 20%;
}

.equation {
  /* height: initial ; */
  display: flex;
  justify-content: center;
  align-items: center;
  font-size: 5.2vw;
  background: #ffffff;
  border-radius: 3px;
  text-align: center;
  margin: 0 10px 0px 0;
  border: 3vh solid #3c3b3a;
}

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

.answer-options {
  font-size: 5.2vw;
}

.options {
  display: flex;
  justify-content: center;
  align-items: center;
  cursor: pointer;
  border-radius: 3px;
  margin-top: 1vh;
  color: #fff;
  transition: 2s;
  border-radius: 5px;
  height: calc( 80vh / 3);
  font-size: 2em;
}

@media (max-width: 768px) {
  .nav{
    display: flex;
    flex-direction: column;
    justify-content: center;
  }

  .nav h2 {
    font-size: 1.5rem;
    float: none;
    text-align: center;
  }

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

  nav li {
    font-size: 1rem;
  }

  .wrapper {
    display: flex;
    flex-direction: column;
    height: 80vh;
  }

  .equation {
    margin: 0px;
  }

  .options {
    height: calc( 40vh / 3);
  }

  .equation {
    height: 60vh;
  }

}

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

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

  nav li {
    font-size: 0.8rem;
  }
}