body, h1, h2, h3, p, ul, ol, li, div, selection, article, header,footer
{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

.greeting-card {
  background-color: #2ECC71;  
  text-align: center;
  padding-bottom: 1%;
  padding-top: 1%;
  margin-top: 5vh;
  animation: fadeIn 2s ease-out forwards;
}
.greeting-line {
  font-family: 'Montserrat', sans-serif;
  font-size: 2.5em;
  font-weight: bold;
  color: blue;
  opacity: 0;
  animation: zoomIn 1.5s ease-out 0.5s forwards;
}
.greeting-subline {
  font-family: 'Montserrat', sans-serif;
  font-size: 1.5em;
  color: #eeeeee;
  opacity: 0;
  animation: slideUp 1.5s ease-out 1.5s forwards;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}
@keyframes zoomIn {
  from { transform: scale(0.95); opacity: 0; }
  to { transform: scale(1); opacity: 1; }
}
@keyframes slideUp {
  from { transform: translateY(20px); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}

body {
  background-color: #ffffff;
}

.greeting-line {
  color: black;
}

.greeting-subline {
  color: grey;
}

.greeting-card:hover {
  box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

button:hover {
  background-color: #2ECC71;
}


body{
  font-family: "Poppins", sans-serif;
  font-weight: 400;
  font-style: normal;
}

.container{
    padding: 10px;
}
.book-container1{
    padding: 10px 15px;
    width: 20%;
    box-sizing: border-box;
    max-width: 90%;
    background:conic-gradient(from 180deg, white, #405DE6);
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    mix-blend-mode: multiply;
    border-radius: 10px;
    color: black;
    margin: 20px;
    display: inline-block;
    vertical-align: top;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
}

.book-container2{
    padding: 10px 15px;
    width: 20%;
    box-sizing: border-box;
    max-width: 90%;
    background: linear-gradient(200deg, #405DE6, #5851DB, #833AB4, #C13584, #E1306C, #FD1D1D, #F56040, #F77737, #FCAF45, #F77737);
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    mix-blend-mode: multiply;
    border-radius: 10px;
    color: black;
    margin: 20px;
    display: inline-block;
    vertical-align: top;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
}
.book-container3{
    padding: 10px 15px;
    width: 20%;
    box-sizing: border-box;
    max-width: 90%;
    background:radial-gradient(circle,white 0%, #ff0000 50%, #000000 125%);
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    mix-blend-mode: multiply;
    border-radius: 10px;
    color: black;
    margin: 20px;
    display: inline-block;
    vertical-align: top;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
}
.book-container1 h2{
    color: gray;
}
.book-container2 h2{
    color: gray;
}
.book-container3 h2{
    color: gray;
}

.book-container1 button{
    background-color: #3498DB;
    color: black;
    border-radius: 10px;
    padding: 5px 10px;
    border: none;
    margin-top: 10px;
}
.book-container2 button{
    background-color: #3498DB;
    color: black;
    border-radius: 10px;
    padding: 5px 10px;
    border: none;
    margin-top: 10px;
}
.book-container3 button{
    background-color: #3498DB;
    color: black;
    border-radius: 10px;
    padding: 5px 10px;
    border: none;
    margin-top: 10px;
}
.book-container1 button:hover {
  background-color: #2ECC71;
}
.book-container2 button:hover {
  background-color: #2ECC71;
}
.book-container3 button:hover {
  background-color: #2ECC71;
}
.add-button{
    background-color: #3498DB;
    color: #ffffff;
    border-radius: 50%;
    padding: 20px 30px;
    font-size: 20px;
    border: none;
    position: fixed;
    bottom: 30px;
    right: 30px;
    cursor: pointer;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
    transition: transform 0.2s ease-in-out;
}

.popup-overlay{
    background: linear-gradient(to right, red, blue) ;
    mix-blend-mode: multiply;
    opacity: 0.4;
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    z-index: 1;
    display: none;
}

.popup-box{
    background-color: #fd6569;
    width: 40%;
    box-sizing: border-box;
    padding: 40px;
    border-radius: 10px;
    position: absolute;
    top: 20%;
    left: 30%;
    z-index: 2;
    display: none;
}

.popup-box input{
    background: transparent;
    width: 100%;
    box-sizing: border-box;
    margin: 5px;
    padding: 5px;
    font-size: 20px;
    border: none;
    border-bottom: solid black 2px;
}

.popup-box textarea{
    background: transparent;
    width: 100%;
    box-sizing: border-box;
    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: 20px 10px;
border: none;
color: white;
margin: 5px;
}

.popup-box input:focus, 
.popup-box textarea:focus
{
    outline: none;
    border:2px solid #3498db;
    box-shadow: 0 0 5px rgba(52, 152, 219, 0.5);
}