*{
    margin: 0;
    padding: 0;
}
body{
    .castoro-regular {
  font-family: "Castoro", serif;
  font-weight: 400;
  font-style: normal;
}

.castoro-regular-italic {
  font-family: "Castoro", serif;
  font-weight: 400;
  font-style: italic;
}

}
.navbar{
    background-color: lawngreen;
    padding: 10px;
}
.container{
  padding: 10px;
}

.book-container{
  padding: 15px;
  width: 25%;
  background-color: gold;
  border-radius: 10px;
  color: black;
  margin: 30px;
  display: inline-block;
 vertical-align: top;
}
.book-container h2{
  background-color: gold;
}

.book-container button{
  background-color: goldenrod;
  color: black;
  border-radius: 10px;
  padding-top: 5px;
  padding-bottom: 5px;
  padding-left: 10px;
  padding-right: 10px;
  border: none;
  margin: 10px;
}
.add-button{
  background-color: gold;
  color: black;
  border-radius: 100%;
  padding-top: 20px;
  padding-bottom: 20px;
  padding-left: 30px;
  padding-right: 30px;
  font-size: 40px;
  border: none;
  position: fixed;
  bottom: 30px;
  right: 30px;
}
.popup-overlay{
  background-color: black;
  opacity: 0.8;
  position: absolute;
  width: 100%;
  height: 100%;
  top: 0;
  left: 0;
  z-index: 1;
  display: none;

}
.popup-box{
  background-color: royalblue;
  width: 40%;
  padding: 40px;
  border-radius: 10px;
  position: absolute;
  top: 20%;
  left: 30%;
  z-index: 2;
  display: none;
} 
.popup-box input{
  background: transparent;
  border: none;
  width: 100%;
  margin: 5px;
  padding: 5px;
  font-size: 20px;
  border-bottom: solid black 2px;
}
.popup-box textarea{
  background: transparent;
  border: none;
  width: 100%;
  margin: 5px;
  padding: 5px;
  font-size: 20px;
  border: solid black 2px;
}

.popup-box input::placeholder{
  color: black;

}
.popup-box textarea::placeholder{
  color: black;
}

.popup-box button{
  background-color: black;
  padding-left: 20px;
  border: none;
  padding-right: 20px;
  color: white;
  padding-top: 10px;
  padding-bottom: 10px;
}
.popup-box input:focus{
  outline: none;
}
.popup-box textarea:focus{
  outline: none;
}