style.css

:root{
  --f1:  #b1abc3; 
  --f2:  #5c5470; 
  --f3:  #352f44; 
  --f4:  #2a2438;
  }

body {
  font-family: Arial, sans-serif;
  font-size: 100%;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  justify-content: space-around;
  flex-wrap: wrap;
  height: 100%;
}

header {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  align-items: center;
  width: 100%;
  background-image: linear-gradient(rgba(0, 0, 0, 0.5), rgba(0, 0, 0, 0.5)), url('./books-images/pexels-abby-chung-1106468.jpg'); 
  background-size: cover;
  background-position: center;
  height: 300px; 
  color: #fff;
  text-align: center;
  margin-bottom: 10px;
  transition: background-image 1s ease; /* Define transition for background image */
}

.sortButtons {
  display: flex;
  flex-direction: row;
  justify-content: space-around;
  align-items: center;
  width: 100%;
  height: 40px;
  padding: 5px 30px;
}

#genreDropdown, 
#btnRate, #btnRandom{
  font-size: 0.875em;
  margin: 10px;
  padding: 10px 25px;
  background-color:rgb(255, 255, 255); 
  color: var(--f2);
  border: none;
  border-radius: 20px;
  cursor: pointer;
  height: 100%;
}

#az:hover, #za:hover, #genreDropdown:hover, 
#btnRandom:hover, #btnRate:hover{
  color: #fff;
  background-color: var(--f2);
}

#az {
  border-radius: 20px 0 0 20px ;
  padding: 10px;
  margin-right: 0;
}

#za{
 border-radius: 0 20px 20px 0;
 padding: 10px;
 margin-left: 5px;
}

#az-za {
  display: flex;
  justify-content: center;
}

.main{
  display: flex;
  flex: 1;
  height: 100%;
  flex-wrap: wrap;
  flex-direction: column;
  align-items: center;
  min-height: 100vh;
} 

.card{
  display: flex;
  flex-direction: row;
  border-bottom: 2px solid rgb(215, 213, 213);
  max-width: 500px;
  max-height: 600px;
  padding: 5px;
  position: relative;
}

h2, h3, p{
  margin:5px 0;
}

.card img{
  object-fit: cover;
  width: 130px;
  height: 220px;
  margin: 5px 20px 5px 5px;
  box-shadow: 3px 3px 5px #AAA;
}

#rate{
  position: absolute;
  margin: 10px;
  font-size: 0.875em;
  padding: 10px 10px;
  color: #fff;
  border-radius: 25px;
  background-color: var(--f1);
}

footer {
  position: sticky;
  bottom: 0;
  height: 40px;
  color: #fff;
  background-color: var(--f3);
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 10px;
  font-size: .6em;
}

.logo {
  width: 40px;
  height: auto;
}

.card div h2{
  color: var(--f4);
}

.card div h3{
  color: var(--f3);
}

.card div p{
  color: var(--f2);
}

/* -----------------------------------------------MEDIA QUERIES--------------------------------------- */
/* -----------------------------------MOBILE SCREENS 360px to 670xp 1column--------------------------- */

@media (min-width: 360px) and (max-width:670px){
  .sortButtons {
    padding: 5px 0px;
  }

  button, select, 
  #btnRate, #btnRandom{
    font-size: 0.875em;
    margin: 5px;
    padding: 10px 5px;
    color: var(--f2);
    border-radius: 20px;
    cursor: pointer;
    height: 100%;
  }

  h1{
    padding: 30px
  }

}
/* -----------------------------------TABLET SCREENS 671px to 1024xp 1 colums-------------------------- */
@media (min-width:671px) and (max-width:1024px) {


.sortButtons {
    width: 80%;
  }
}

/* -----------------------------------PC SCREENS >1024px 3 columns ------------------------------------- */
@media (min-width: 1024px){
 #container{
    height: 100%;
    display: grid;
    gap: 30px;
    max-width: 80%;
    grid-template-columns: 1fr 1fr 1fr; 
    grid-template-rows: auto 1fr auto   
  }  
}