/* COPYRIGHT
The Digital-7 font used in this project comes from http://www.styleseven.com/. The fonts is freeware for home using. For more information contact ms-7@styleseven.com.
*/

/* Box Model Hack */
* {
     box-sizing: border-box;
}

/* Clear fix hack */
.clearfix:after {
     content: ".";
     display: block;
     clear: both;
     visibility: hidden;
     line-height: 0;
     height: 0;
}

.clear {
	clear: both;
}

/******************************************
/* BASE STYLES
/*******************************************/

body {
     font-family: Verdana, Geneva, Tahoma, sans-serif;
     font-size: 30px;
     background: gainsboro;
}

@font-face {
     font-family: "Digital-7";
     src: url('../fonts/Digital-7.svg') format('svg'),
          url('../fonts/Digital-7.ttf') format('truetype'),
          url('../fonts/Digital-7.woff') format('woff');
     font-weight: normal;
     font-style: normal;
}

@font-face {
     font-family: 'digital-7';
     src: url('../fonts/digital-7.eot');
     src: url('../fonts/digital-7.eot?#iefix') format('embedded-opentype'),
          url('../fonts/digital-7.woff2') format('woff2');
     font-weight: normal;
     font-style: normal;
   }
   

/******************************************
/* LAYOUT
/*******************************************/

.container {
     margin: 0 auto;
     width: fit-content;
     margin-top: 70px;
}

.calculator {
     max-width: 400px;
     min-width: 300px;
     height: 600px;
     padding: 30px;

     display: flex;
     flex-wrap: wrap;

     background: rgba(52, 52, 56, 1);

     border: solid black thin;
     border-radius: 5px;

     box-shadow: inset -1px -1px 10px 2px rgba(126, 125, 125, .6),
                 0px 0px 0px 1px rgba(0, 0, 0, 1),
                 0px 0px 0px 4px rgba(52, 52, 56, 1),
                 3px 1px 0px 2px rgba(52, 52, 56, 1),
                 4px 1px 0px 2px rgba(0, 0, 0, 1);
     
     animation: levitate 1.5s cubic-bezier(0.56, 0.11, 0.59, 0.84) alternate 6;
}

@keyframes levitate {
     0% {
          transform: translateY(0);
     }

     100% {
          transform: translateY(-30px);
     }     
}

.calculator::after {
     content: '';

     display: block;
     width: 280px;
     position: relative;
     top: 20px;
     left: 30px;

     background-color: rgba(52, 52, 56, 1);
     border-radius: 15px;
     box-shadow: 0px 50px 10px 7px rgba(0, 0, 0, .3);

     animation: shrink-shadow 1.5s cubic-bezier(0.56, 0.11, 0.59, 0.84) alternate 6;
}

@keyframes shrink-shadow {

     100% {
          width: 200px;
          left: 60px;   
          
          box-shadow: 0 50px 10px 1px rgba(0, 0, 0, .1);
     }
}

.calculator__screen { 
     height: 100px;
     margin-bottom: 20px;
     padding: 5px;

     flex: 1 0 100%;

     background-clip: content-box;
     background-image: linear-gradient(rgba(152, 161, 144, .5), rgba(152, 161, 144, .5)),
                       linear-gradient(to right, rgba(150, 163, 149, 1), rgba(132, 159, 136, 1));

     border-radius: 10px;

     box-shadow: inset 0px -5px 3px rgba(0,0,0,.9),
                 inset 0px 1px 1px rgba(0,0,0,1),
                 inset 1px 0px 1px rgba(0,0,0,.9),
                 -10px 0px 4px -45px rgba(52,52,56,1),
                 0px 10px 4px rgba(44,44,46,.9),
                 10px 0px 4px 1px rgba(62,62,67,1);

     font-family: "Digital-7", sans-serif;
     text-align: right;
     font-size: 80px;
}

.calculator__keysbg {
     height: 400px;
     width: 100%;
     padding: 7px;

     display: flex;
     flex-wrap: wrap;
     gap: 1px 7px;
     
     background: rgba(52, 52, 56, 1);

     border-radius: 7px;
}


.calculator button {
     height: 18%;
     flex: 1 0 23%;   
     position: relative; 
     padding: 0;

     background: linear-gradient(200deg, rgba(48,50,52,.1), rgba(188,188,188,.05)), 
                 linear-gradient(rgba(72, 72, 76, 1), rgba(72, 72, 76, 1)); 

     border-radius:15px;
     border-top: 1px solid rgba(82, 83, 85, .5);
     border-left: 1px solid rgba(86, 86, 86, .5);
     border-right: 2px solid rgba(36, 36, 36, 1);
     border-bottom: 2px solid rgba(19, 18, 21, .5);

     box-shadow: 2px 2px 4px 1px black,
                 inset 2px 1px 4px 0 rgba(255, 255, 255, .2),
                 inset -3px 2px 5px 0 rgba(0, 0, 0, .2);

     color: white;
     text-shadow: 1px 1px 7px black;
}

.calculator button:active {
     border-right: 1px solid rgba(36, 36, 36, 1);
     border-bottom: 1px solid rgba(19, 18, 21, 1);

     box-shadow: 0px 0px 4px 2px black;
}

button.double-size {
     flex: 10 0 20%;
}

/******************************************
/* ADDITIONAL STYLES
/*******************************************/