/**
 * set the box-sizing property to border-box
 * all elements will include padding and border in the width and height
 * the star selector is a universal selector - selects all elements
 * the before and after pseudo-elements are included
 * now the width property value will be subtracted to include padding and border
 * default model is content-box - padding and border are added to the width and height
 * works best for most designs 
 * - however if width is small and padding is large overflow can occur
 */
 *,
 *:before,
 *:after {
     box-sizing: border-box;
 }
 
 /**
  * set the min-height to 100dvh
  * dvh is the dynamic viewport height
  * it will adjust based on the changing viewport height
  * if the browser adds controls or the viewport height changes
  * the min-height will adjust to the new height
  */
 html {
     font-family: sans-serif;
     min-height: 100dvh;
 }
 
 /**
  * multiple backgrounds
  * background is the shorthand property
  * url() is the background-image property
  * repeat-x is the background-repeat property
  * fixed is the background-attachment property
  * top image and the gradient will be fixed to the viewport
  * page content will scroll and the background will remain fixed
  */
 
 /* prettier-ignore */
 body {
     margin: 0;
     min-height: 100dvh;
     background: 
         url(images/club-rotate.webp) fixed no-repeat top 20px left 15px / 200px 200px, 
         url(images/spade-rotate.webp) fixed no-repeat top 20px right 15px / 200px 200px, 
         url(images/heart-rotate.webp) fixed no-repeat bottom 20px left 15px / 200px 200px, 
         url(images/diamond-rotate.webp) fixed no-repeat bottom 20px right 15px / 200px 200px, 
         fixed
         linear-gradient(
             to bottom, 
             rgb(255, 0, 0) 40%, 
             rgb(0, 0, 0) 63%
             )
         #000;
 }
 
 /**
  * create a grid container
  * no columns or rows are defined
  * the grid will automatically create columns and rows
  * based on the content
  * max-width is 800px
  * div is a block-level element
  * it will try to take up the full width of the container
  * never larger than 800px
  */
 
 .wrapper {
     display: grid;
     max-width: 800px;
     border: 2px solid white;
     border-radius: 10px;
     background: rgb(99, 0, 0);
     margin-top: 10px;
     margin-bottom: 10px;
 }
 
 /**
  * display flex - create a flex container
  * flex direction is row (left to right)
  * all elements will shrink to the minimum size of the content
  * and flow from left to right
  * multiple background images (gradients behave like images)
  * background is the shorthand property
  * url() is the background-image property
  * no-repeat is the background-repeat property
  * top 0px right 0px is the background-position property (x, y)
  * the additional value after the keyword is the offset
  * place the image in the top right corner
  * then move it 0px down and 0px left
  * positive values move in towards the center of the element
  * negative values move out away from the element
  * / 50px 50px is the background-size property (width, height)
  * keyword cover is the background-size property
  * cover will scale the image to cover the entire container
  * contain will scale the image to fit inside the container
  * cover is used most often
  * background color must always be last
  * a stacking order is created
  * first background image/gradient is on top
  * last background image/gradient is on the bottom
  */
 /* prettier-ignore */
 header {
     display: flex;
     border-radius: 10px;
     border: 2px solid gray;
     margin: 20px;
     background: 
         url(images/amazed.webp) no-repeat top left / 100px 100px, 
         url(images/ace.webp) no-repeat center center / cover,  
         linear-gradient(
             to bottom, 
             hsl(0, 100%, 48%), 
             hsl(0, 100%, 44%)
         )
         #000;
     box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.8);
 }
 
 /**
  * h1 is a flex item of the flex container
  * flex-grow is 1 - don't shrink wrap around the content
  * flex-shrink is 1 - allow the item to shrink to fit the container
  * flex-basis is auto - the initial size of the item
  * the flex direction is row (left to right) layout the h1 in the row direction
  * margin is 0 remove the default margin - creating an edge-to-edge design
  * line-height is 4 * font-size - this will set the actual height of the line box
  * the text will be vertically centered in the in the line box
  * background is a gradient
  * border-radius is 10px all 4 corners - will be overridden in the media query
  */
 /* prettier-ignore */
 header h1 {
     flex: 1 1 auto;
     margin: 0;
     color: #fff;
     line-height: 4;
     text-align: center;
     letter-spacing: 2px;
     text-shadow: 0 -2px 2px rgba(0, 0, 0, 0.6);
     background: 
         transparent 
         linear-gradient(
             to bottom, 
             hsla(0, 100%, 68%, 0.747) 20px, 
             hsla(0, 56%, 48%, 0.705) 40px, 
             rgb(85, 10, 10)
         );
     border-top-left-radius: 10px;
     border-top-right-radius: 10px;
     border-bottom-left-radius: 10px;
     border-bottom-right-radius: 10px;
     font-size: x-large;
 }
 
 /**
  * sup is a superscript element
  * used for footnotes, endnotes, power, and exponents
  * font-size is 0.6 * inherited font-size
  * find the value of the inherited font-size from the parent element
  * multiply by 0.6
  * use the Developer Tools Computed tab/panel to find the actual font-size of the parent element
  */
 header h1 sup {
     font-size: 0.6em;
 }
 
 /**
  * background gradient
  * small gradient on top
  * first color is 0% from the top
  * second color is 5% from the top
  * third color is 20% from the top (same color as the background)
  */
 /* prettier-ignore */
 section {
     margin: 20px;
     border: 2px solid white;
     border-radius: 10px;
     padding: 10px;
     box-shadow: 0 4px 4px rgba(0, 0, 0, 0.8);
     background:  
         linear-gradient(
             to bottom, 
             hsl(0, 100%, 40%) 0%, 
             hsla(0, 100%, 40%, 0.5) 5%, 
             hsl(0, 100%, 90%) 50%,
             hsla(0, 100%, 40%, 0.5) 95%,
             hsl(0, 100%, 40%) 100%
         )
         #fff;
 }
 
 /**
  * margin 24px on top and bottom
  * zero on right and left
  * 6px on bottom (override the 24px)
  */
 h2 {
     margin: 20px 0 7px;
 }
 
 /**
  * use larger line-height for improved readability
  * set maximum width to 60ch (60 characters) for improved readability
  */
 p {
     margin: 55px 0 50px;
     line-height: 1.4;
     max-width: 60ch;
 }
 
 /**
  * Responsive Images
  * set width to 100%
  * images will scale to fit the container
  * percentage is based on the width of the containing block (parent element)
  */
 img {
     width: 100%;
 }
 
 /**
  * Setup flex container
  * elements flow in row direction (left to right)
  * gap between elements is 20px
  * margin is 0 on top 
  * 20px on right and left
  * 20px on bottom
  */
 footer {
     display: flex;
     gap: 20px;
     margin: 0 20px 20px;
 }
 
 /**
  * All anchor pseudo states
  * remove default text decoration
  * color is white
  * height is 2 * font-size (2 * 16 = 32)
  */
 footer a {
     color: white;
     text-decoration: none;
     line-height: 2;
 }
 
 /**
  * first child of footer
  * margin-right is auto
  * as a flex item margin auto will consume all available space (unused pixels
  * the other flex items will be pushed to the right)
  */
 footer a:first-child {
     margin-right: auto;
 }
 
 /**
  * square brackets are attribute selectors
  * href^="javascript" means href attribute starts with javascript
  * the $ means ends with
  * the * means contains
  * the ~ means contains word
  * the | means starts with
  * the ^ means starts with
  * the = means is equal to
  * the != means is not equal to
  * position is relative (setting up for the active state - moving the element down 2px)
  * style like a button
  */
 footer a[href^="javascript"] {
     position: relative;
     color: #000;
     background-color: #fff;
     border-radius: 3px;
     padding: 0 10px;
     box-shadow: 0 2px 2px #000;
 }
 
 footer a[href^="javascript"]:active {
     top: 2px;
     box-shadow: none;
 }
 
 /*
 Start Media Query
     if screen is 48rem or larger (can use px or em)
     rem is based on font size of root element
         (16px * 48 = 768)
     use the following rules
 */
 
 @media (min-width: 48rem) {
     /**
      * override the margin of the container 
      * margin is now 20px on top and bottom
      * auto on left and right
      * auto will center the container
      */

     .wrapper {
         margin: 20px auto;
         position: relative;
     }
     /**
      * height is 400px - a design decision
      * multiple background images
      * background is the shorthand property
      * url() is the background-image property
      * no-repeat is the background-repeat property
      * 80px -10px is the background-position property (x, y)
      * / 200px 200px is the background-size property (width, height)
      */
     /* prettier-ignore */
     header {
         height: 400px;
         background: 
             url(images/amazed.webp) no-repeat top left / 250px 250px, 
             url(images/ace.webp) no-repeat center center / cover, 
             linear-gradient(
                 to bottom, 
                 hsl(0, 100%, 48%), 
                 hsl(0, 100%, 44%))
             #000;
             position: relative;
     }

     header::after {

        content: " ";
        float: right;
        background: url(images/arrow-rotate2.webp) no-repeat top left / 400px 400px;
        width: 400px;
        height: 400px;
        position: absolute;
        right: -95px;
        top: -70px;
     }
 
     /**
      * font-size is 2.75 * inherited font-size (16px)
      * height is 2 * font-size (2.75 * 16 = 44)
      * flex item flowing in row direction (left to right the main axis)
      * align-self is flex-end (bottom of flex container the cross axis)
      * remove border-radius from top of header
      */
     header h1 {
         font-size: 2.75em;
         line-height: 2;
         align-self: flex-end;
         border-top-left-radius: 0px;
         border-top-right-radius: 0px;
     }
 
     /**
      * override the width of the image (auto is the intrinsic width)
      * float the image to the right
      * set margin opposite the float direction
      */
     img {
         width: 250px;
         height: 250px;
         float: right;
         margin: 0 0 50px 5px;
     }
 }