/*
   New Perspectives on HTML and CSS, 8th Edition
   Tutorial 8
   Case Problem 2

   Pixal Arts and Entertainment Animation Styles
   Author: Andrew Hainline
   Date:   11/24/25

   Filename: 
   
   Sprite animation is created using the paa_bat.png, 
   paa_bfly.png, and paa_fox.png image files.
   
   paa_bat.png has 40 frames
   paa_bfly.png has 34 frames
   paa_fox.png has 28 frames

*/


/* Transition Effects */

nav#gameLinks a {
   position: relative;
   color: white;
   transition: color 0.5s;
}

nav#gameLinks a:hover {
   color: rgb(255, 194, 99);
}

nav#gameLinks a::after {
   content: "";
   position: absolute;
   top: 100%;
   left: 0;
   width: 0%;
   height: 8px;
   background: linear-gradient(to right, rgb(237, 243, 71), rgb(188, 74, 0));
   border-radius: 4px;
   opacity: 0;
   transition: opacity 0.5s, width 0.5s;
}

nav#gameLinks a:hover::after {
   opacity: 1;
   width: 100%;
}


/* Sprite Styles */

.sprite {
   position: absolute;
}

#bat {
   width: 40px;
   height: 50px;
   top: 100px;
   left: -50px;
   background: url("paa_bat.png") left center / cover no-repeat;
}

#butterfly {
   width: 35px;
   height: 35px;
   top: 60px;
   left: -50px;
   background: url("paa_bfly.png") left center / cover no-repeat;
}

#fox {
   width: 280px;
   height: 260px;
   bottom: 10px;
   right: 10px;
   background: url("paa_fox.png") left center / cover no-repeat;
}

/* Animation Styles */

@keyframes playSprite {
   100% { background-position: right center; }
}

@keyframes flyRight {
   25% { top: 150px; }
   50% { top: 55px; }
   65% { top: 120px; }
   90% { top: 50px; }
   100% { 
      top: 80px;
      left: 100%;
   }
}

#fox {
   animation: 
      playSprite 3.5s steps(27) 4s infinite;
}

#bat {
   animation:
      playSprite 2s steps(39) infinite,
      flyRight 8s linear infinite;
}

#butterfly {
   animation:
      playSprite 1s steps(33) 3s infinite,
      flyRight 6s cubic-bezier(0,1,0.73,0) infinite;
}