*{
  padding: 0;
  margin: 0;
  box-sizing: border-box;
  font-family: "Work Sans", sans-serif;
}

body{
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  background: url("./images/background-pattern-desktop.svg");
  background-repeat: no-repeat;
  background-color: hsl(275, 100%, 97%);
  background-position: top;
  width: 100vw;
  background-size: 100vw;
}

/* main container */
.main{
  width: 600px;
  background: white;
  padding: 2rem;
  border-radius: 1rem;
}

/* header */
.main .header{
  display: flex;
  align-items: center;
  gap: 1.4rem;
}

.main .header img{
  width: 50px;
  height: 50px;
}

.main .header h1{
  font-size: 50px;
  font-weight: 700;
}

/* equations section */
.main .equations{
  margin-top: 2rem;
  margin-bottom: 1rem;
}

.main .equations .quation{
  margin-bottom: 1rem;
}

.main .equations .quation .quation-header{
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1rem;
}

.main .equations .quation .quation-header:hover{
  color: hsl(276, 92%, 46%);
  cursor: pointer;
}

.main .equations .quation .quation-header h2{
  font-size: 24px;
  font-weight: 600;
  width: 90%;
}

.main .equations .quation .quation-header button{
  background: none;
  border: none;
  cursor: pointer;
}

.quation-details{
  display: none;
}

.show-details{
  display: block;
}

.quation-details p{
  font-size: 16px;
  color: hsl(274, 7%, 64%);
}


/* responsive */
@media (max-width: 700px) {
  body{
    background: url("./images/background-pattern-mobile.svg");
    background-repeat: no-repeat;
    background-color: hsl(275, 100%, 97%);
    background-position: top;
    width: 100vw;
    background-size: 100vw;
  }

  .main{
    width: 400px;
  }
}

@media (max-width: 450px) {
  .main{
    width: 90%;
    padding: 1rem;
  }

  .main .header h1{
    font-size: 36px;
  }
}