/* Basic setup */
html, body {
  margin: 0;
  padding: 0;
  font-family: sans-serif;
  color: #333;
   min-height: 200vh; 
}

body {
  background-color: #DAE8FC;
  background-image: linear-gradient(to bottom, #DAE8FC, #edf9fc);
  background-repeat: no-repeat;
  background-attachment: fixed;
  background-size: cover;
}

/* Scrollable content */
main {
  padding: 2rem;
  max-width: 800px;
  margin: 0 auto;
  padding-top: 100vh;
  padding-bottom: 100vh;
}

h1 {
  text-align: center;
  color: #0d47a1;
}

/* Book container & flip */
#book-container {
  width: 1157px;
  height: 900px;
  aspect-ratio: 2 / 3;
   position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, 0);
  transform-style: preserve-3d;
  perspective: 1500px;
  transition: transform 0.8s cubic-bezier(0.68,-0.55,0.27,1.55);
	background-color: magenta;
  border-radius: 8px;
  z-index: -1;
}
#book-container.flipped {
  transform: translate(-50%, -0) rotateY(180deg);
}
.book-face {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: contain;
  box-shadow: 0 10px 30px rgba(0,0,0,0.2);
  border-radius: 8px;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
}
#book-back {
  transform: rotateY(180deg);
}

	
/* Hummingbird styling */
.hummingbird {
  position: fixed;
  width: 150px;
  height: auto;
  z-index: 1;
  pointer-events: none;
  opacity: 0;
  transition-property: transform, opacity;
  transition-timing-function: ease-out;
}