/* box shadow
.boxshadow{
    width: 200px;
    height: 200px;
    padding: 20px ;
    margin: 20px auto;
    border: 1px solid #dddddd ;
    box-shadow: 10px 10px 10px #f00 inset,
    -10px -10px 10px #00f inset;
} */
/* =================================================== */
/*box sizing  */

/* *{
    
    -webkit-box-sizing: border-box;
    -moz-box-sizing: border-box;
    -o-box-sizing: border-box;
    -ms-box-sizing: border-box;
    box-sizing: border-box;

}
section{
    width:500px;
    margin: 20px auto;
    border: 1px solid #dddddd ;
    overflow: hidden;
}
.right{
    padding: 10px;
    float: right;
    width: 15%;
    background-color: #00f;
    color: #dddddd;
}

.left{
    padding: 100px;
    float: left;
    width: 85%;
    background-color: #f00;
    color: #dddddd;
} */
/* ============================================================= */
/* text overflow */
/* div
{
    width: 200px;
    background-color:#ddd;
    padding: 10px;
    border: 1px solid #ccc;
    overflow: hidden;
    white-space: nowrap;
    text-overflow: ellipsis;
}
div:hover{
    overflow: hidden;
    white-space: normal;
} */
/* ====================================================== */
/* rotate  */
/* div
{
width: 200px;
height: 10px;
padding: 20px ;
margin: 20px auto;
border: 1px solid #dddddd ;
transform: rotate(190deg);
} */
/* ============================================================================ */
/* scale */
/* *{
    box-sizing: border-box;
}
.container{
    width:250px;
    height:100px;
    margin: 20px auto;
    padding: 10px;
    background-color: lawngreen;
}
.test{
    width: 100%;
    height: 100%;
    background-color: lightseagreen;
    color: white;
    text-align: center;
    padding: 10px;
}
.test:hover{
    transform: scale(0.5);
} */
/* ====================================================== */

/* translate , skew */
/* .container{
    margin:50px auto;
    border:1px solid grey;
    background-color:  #ddd;
    width: 250px;
    height: 220px;
}
.translate{
    margin: 20px auto;
    padding: 20px;
    background-color: rgb(0, 0, 0);
    width: 100px;
    height:100px;
    transition: all 1s ease-in-out ;
    color: white;
}
.translate:hover{
    transform: translate(30px,30px) scale(.5) skew(20deg,0);
} */
/* =================================================================== */
/* rotate 3d */
/* transform:rotatex()
          rotatey()
          rotatez() */
/*=====================================================================  */

/* translate 3d ,scale 3d ,matrix 3d
need prespective for the cotainer of the element */
/* body{
    perspective: 1000px;
}
img{
    width: 80px;
    height: 75px;
    display: block;
    margin: 50px auto;
    transition: all .5s ease-in-out;
}
img:hover{
    transform: translate3d(100px,10px,10px) scale3d(2,2,2)

} */
/* ========================================================== */

/* preserve 3d */
/* .father{
    width: 300px;
    height: 300px;
    margin: 50px auto;
    position: relative;
    background-color: #090;
    transform: rotateY(20deg);
    transform-style: preserve-3d;

}
.c1{
    width: 300px;
    height: 300px;
    background-color: #009;
    position: absolute;
    top: 30px;
    left: 30px;
    transform:translateZ(50px) rotatey(45 deg);
}


.c2{
    width: 300px;
    height: 300px;
    background-color: #900;
    position: absolute;
    top: 30px;
    left: 30px;
    transform:translateZ(150px) ;
} */
/* ====================================== */

/* backface visibility and flipping card */
/* body{
    font-family: Arial, Helvetica, sans-serif;
    perspective: 500px;
} 
.card{
    width: 300px;
    height: 350px;
    margin: 50px auto;
    position: relative;
    transition: all .54s ease-in-out;
    transform-style: preserve-3d;
    border-radius:10px ;
}
.card:hover{
    transform: rotateY(180deg);
}
.card > div{
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: #eee;
    color: #777;
    text-align: center;
    font-family: Arial, Helvetica, sans-serif;
}

.front{
    z-index: 2;
    backface-visibility: hidden ;
    border-radius: 10px;
}
.front header{
    background-color: #444;
    width: 100%;
    height: 80px;
    border-radius: 10px 10px 0 0;
    margin-bottom: 55px;
}
.front img{
      width: 100px;
      height: 100px;
      border-radius:50% ;
      position: relative;
      top:25px
}
.front h3{
    margin-bottom: 5px;
}
.front p{
    margin: 0 auto;
    padding: 15px;

}
.front span{
    display:inline-block;
    margin-top: 5px;
    font-weight: bold;
    color: #0d2567;
}
.back{
    z-index: 1;
    transform: rotateY(180deg);
    background-color: crimson;
    backface-visibility: hidden;
} 
.back p{
    padding: 10px;
} */
/* =============================================================== */
/* flex box 1 parent
.cont{
   width: 800px;
    padding: 10px;
    margin: 50px auto;
    background-color: #ddd;
    display: flex;
    /* display: inline-flex; */
/* flex-direction: column; */
/* flex-direction: row;
    flex-wrap: wrap; */
/* flex-flow: row wrap ; */
/* justify-content: space-between;
}
.cont div 
{
    width:100px;
    margin: 5px;
    padding: 10px;
    background-color: #080;

} */

/* ======================================== */
/* trasition */
/* transition : property | duration | timing function | delay */
/* * {
  margin: 0;
  padding: 0;
}
div {
  width: 200px;
  height: 120px;
  background-color: #aaa;
}
p {
  background-color: cyan;
  margin: 5px 0 5px 0;
  width: 120px;
  height: 20px;
  transition-property: width;
  transition-duration: 3s;
}
div p:first-of-type {
  transition-timing-function: ease;
}
div p:nth-of-type(2) {
  transition-timing-function: linear;
}
div p:nth-of-type(3) {
  transition-timing-function: ease-in;
}
div p:nth-of-type(4) {
  transition-timing-function: ease-out;
}
div p:last-of-type {
  transition-timing-function: ease-in-out;
}

div:hover p {
 
  width: 200px;
  /* transition: all 3s ease-in-out; 
} */
/* ======================================================== */
/* transition Example */
/* div{
    font-family: Arial, Helvetica, sans-serif;
    width:150px;
    height: 150px;
    background-color: darkblue;
    margin:50px auto;
    color:white;
    text-align: center;
    line-height: 130px;
    box-shadow: inset 0 0 0 5px cadetblue;
    border-radius: 10px;
    transition: all .5s ease-in-out;
}

div:hover {

border-radius: 50%;
} */
/* ================================================== */

/* column count and column gap and column rule*/

/* div{
    border: 1px solid black;
    /* padding: 10px;
    column-count:5;
    column-gap: 20px;
    column-rule: 4px solid #3498db ; */

/* short hand
        columns:width cout;
    */

/* columns: 10px 4; */
/* }  */
/* div h2{
    column-span: all;
} */
/* ============================================================ */

/* animation */


.big {
  display: flex;
  flex-wrap: wrap;
  position: absolute;
  width: 100px;
  height: 100px;
  margin: 50px auto;
  /* animation: keyframe-name |duration | number-of-repeation   */
  animation: move 10s 5;
  animation-direction: alternate;
  /* animation-fill-mode: backwards; ==> takes the first key properties  ( 0% ) */
  /* animation-fill-mode: forwards; ==> takes the last key properties  ( 100% ) */ 
  /* animation-fill-mode: both; ==> takes the first , last key properties  ( 0% , 100% ) */
  /* animation-timing-function: ease-in-out;s */


}
.one,
.two,
.three,
.four {
  width: 50%;
  height: 50%;

}

.one {
  background-color: red;
}
.two {
  background-color: green;
}
.three {
  background-color: lightseagreen;
}
.four {
  background-color: yellow;
}

@keyframes move {
  0% {
    
    top: 0;
    left: 0;
  }
  25% {
    top: 0;
    left: 200;
  }
  50% {
    top: 200;
    left: 200;
  }
  75% {
    top: 200;
    left: 0;
  }
  100% {
    top: 0;
    left: 0;
  }
}