* {
   padding: 0;
   margin: 0;
   box-sizing: border-box;
}

body {
    background-color: #fafafa;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    font-family: Arial, Helvetica, sans-serif;
}

.container {
    background-color: #333;
    padding: 40px 30px 3px;
    padding-right: 20px;
    border-radius:  20px;
    min-width: 300px;
    min-height: 400px;
    box-shadow: 25px 25px 75px rgba(0, 0,  0, 0.25),
    10px 10px 70px rgba(0, 0,  0, 0.25),
    inset -5p -5px 15px rgba(0, 0,  0, 0.25),
    inset 5px 5px 15px rgba(0, 0,  0, 0.25);
}

.calculator {
    display: grid;
    gap: 10-x;
    
}

.calculator .value {
    grid-column: span 4;
    height: 100px;
    width: calc(100% - 10px);
    background-color: rgba(10, 238, 178, 0.873);
    margin-bottom: 10px;
    border-radius: 10px;
    border: none;
    outline: none;
    font-size: 36px;
    padding: 10px;
    text-align: right;
    position: relative;
}   

.calculator button {
    border: none;
    width: 80px;
    height: 80px;
    background: linear-gradient(180deg, #2f2f2f, #3f3f3f);
    color: #fafafa;
    border-radius: 10px;
    cursor: pointer;
    box-shadow: inset -8px 0 8px rgba(0, 0, 0, 0.15)
    inset 0 -8px 8px rgba(0, 0, 0, 0.25),
    0 0 0 2px rgba(0, 0, 0, 0.75,),
    10px 20px 25px rgba(0, 0, 0, 0.4);
    position: relative;
}

.calculator button::before {
    content: '';
    position: absolute;
    top: 3px;
    left: 4px;
    right: 12px;
    bottom: 14px;
    border-radius: 10px; /*remove for slecker design*/
    background: linear-gradient(90deg, #2d2d2d, #4d4d4d);
    box-shadow: -5px -5px 15px rgba(0, 0, 0, 0, 0.1),
    10px 5px 10px rgba(0, 0, 0, 0.15);
    border-left: 1px solid rgba(0, 0,  0, 0.27);
    border-bottom: 1px solid rgba(0, 0,  0, 0.27);
    border-top: 1px solid rgba(0, 0,  0, 0.6);

}

.calculator button i {
  position: relative; 
  text-transform: uppercase;
  font-style: normal;
  font-size: 1.5em;
}

.calculator button:active {
    filter: brightness(1.5);


}

.calculator button.clear{
    background:orange
}

.calculator button.clear::before{
    background: linear-gradient(90deg, orange, rgba(265, 255, 255, 0.36));
    border-left: 1px solid rgba(255, 255,  255, 0.27);
    border-bottom: 1px solid rgba(255, 255,  255, 0.27);
    border-top: 1px solid rgba(255, 255,  255, 0.27);
}

.calculator button.equal {
    grid-row: span 2;
    height: 180px; 
    background: #2196f3;
}

.calculator button.equal::before{
    background: linear-gradient(90deg, #1479c9, rgba(265, 255, 255, 0.36));
    border-left: 1px solid rgba(255, 255,  255, 0.27);
    border-bottom: 1px solid rgba(255, 255,  255, 0.27);
    border-top: 1px solid rgba(255, 255,  255, 0.27);
}