/*
Important:

This is sample code demonstrating API, technology or techniques in development.
Although this sample code has been reviewed for technical accuracy, it is not 
final. Apple is supplying this information to help you plan for the adoption of 
the technologies and programming interfaces described herein. This information 
is subject to change, and software implemented based on this sample code should 
be tested with final operating system software and final documentation. Newer 
versions of this sample code may be provided with future seeds of the API or 
technology. For information about updates to this and other developer 
documentation, view the New & Updated sidebars in subsequent documentation seeds.
*/

/*
File: Leaves.css

Abstract: Defines CSS properties for the WithCSSExtensions sample.
          Applies animations to the leaves. Defines the appearance, position, and dimensions of 
          all div elements on the "Falling Leaves -- Using CSS Animations and Transforms" page.
          
Version: 1.0

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*/

body
{
    background: none;
    width: 100%;
    height: 100%;
    margin: 0px;
}


/* Defines the position and dimensions of the leafContainer div */
#leafContainer 
{
    position: absolute;
    top: 0px;
    width: 100%;
    height: 100%;
    z-index: 0;
    overflow: hidden;
}


/* Defines the appearance, position, and dimensions of the message div */
#message
{
    position: relative;
    width: 360px;
    margin: 100px auto 0px auto;
    background: rgba(255, 255, 255, 0.5);
    /* Create a round layout */
    -webkit-border-radius: 30px;
    font-size: 180%;
    font-family: 'Arial Rounded MT Bold';
    text-align: center;
    padding: 6px 10px;
}


/* Sets the color of the "Dino's Gardening Service" message */
em 
{
    color: #660000;
    font-weight: bold;
}


/* This CSS rule is applied to all div elements in the leafContainer div.
   It styles and animates each leafDiv.
*/
#leafContainer > div 
{
    position: absolute;
    width: 80px;
    height: 40px;
    
    /* We use the following properties to apply the fade and drop animations to each leaf.
       Each of these properties takes two values. These values respectively match a setting
       for fade and drop.
    */
    -webkit-animation-iteration-count: infinite, infinite;
    -webkit-animation-direction: normal, normal;
    -webkit-animation-timing-function: linear, ease-in;
}

/* This CSS rule is applied to all img elements directly inside div elements which are
   directly inside the leafContainer div. In other words, it matches the 'img' elements
   inside the leafDivs which are created in the createALeaf() function.
*/
#leafContainer > div > img {
     position: absolute;
     width: 80px;
     height: 40px;

    /* We use the following properties to adjust the clockwiseSpin or counterclockwiseSpinAndFlip
       animations on each leaf.
       The createALeaf function in the Leaves.js file determines whether a leaf has the 
       clockwiseSpin or counterclockwiseSpinAndFlip animation.
    */
     -webkit-animation-iteration-count: infinite;
     -webkit-animation-direction: alternate;
     -webkit-animation-timing-function: ease-in-out;
     -webkit-transform-origin: 50% -100%;
}


/* Hides a leaf towards the very end of the animation */
@-webkit-keyframes fade
{
    /* Show a leaf while into or below 95 percent of the animation and hide it, otherwise */
    0%   { opacity: 1; }
    95%  { opacity: 1; }
    100% { opacity: 0; }
}


/* Makes a leaf fall from -300 to 2000 pixels in the y-axis */
@-webkit-keyframes drop
{
    /* Move a leaf to -300 pixels in the y-axis at the start of the animation */
    0%   { -webkit-transform: translate(0px, -50px); }
    /* Move a leaf to 2000 pixels in the y-axis at the end of the animation */
    100% { -webkit-transform: translate(0px, 2000px); }
}

/* Rotates a leaf from -50 to 50 degrees in 2D space */
@-webkit-keyframes clockwiseSpin
{
    /* Rotate a leaf by -50 degrees in 2D space at the start of the animation */
    0%   { -webkit-transform: rotate(-50deg); }
    /*  Rotate a leaf by 50 degrees in 2D space at the end of the animation */
    100% { -webkit-transform: rotate(50deg); }
}


/* Flips a leaf and rotates it from 50 to -50 degrees in 2D space */
@-webkit-keyframes counterclockwiseSpinAndFlip 
{
    /* Flip a leaf and rotate it by 50 degrees in 2D space at the start of the animation */
    0%   { -webkit-transform: scale(-1, 1) rotate(50deg); }
    /* Flip a leaf and rotate it by -50 degrees in 2D space at the end of the animation */
    100% { -webkit-transform: scale(-1, 1) rotate(-50deg); }
}
