:root {
    --color-primary: #FDB82C;
    --color-primary-dark: #494338;
    --color-secondary: #8D28DF;
    --color-secondary-dark: #47325B;
    --color-dark-1: #414345;
    --color-dark-2: #4C453B;
    --color-dark-3: #A6AFAE;
}

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

html {
    font-size: 62.5%;
}


body {
    background: linear-gradient(#2D3134, #2D3134);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 2rem;
    line-height: 1.5;
}

.calculator {
    width: 37rem;
    border-radius: 3px;
    background: linear-gradient(#4C5051, #1E2225);
    box-shadow: 0px 15px 25px #191D1E;
}

.output {
    display: flex;
    justify-content: center;
    flex-direction: column;
    padding: 1rem 2rem;
    height: 15rem;
    border: 0;
    outline: 0;
    background-color: transparent;
    border-bottom: 1px solid rgb(32, 35, 37);
    color: var(--color-dark-3);
}

input {
    width: 100%;
    display: block;
    background-color: transparent;
    text-align: right;
    outline: 0;
    border: 0;
}

.input.entry {
    font-size: 1.9rem;
    color: #7a8185;
}

.input.result {
    font-size: 6.7rem;
    color: var(--color-dark-3);
}

input[type=number]::-webkit-inner-spin-button, 
input[type=number]::-webkit-outer-spin-button { 
  -webkit-appearance: none; 
  margin: 0; 
}

.calculator-buttons {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
}

.calc-button {
    padding: 1rem;
    height: 8rem;
    font-size: 2rem;
    color: var(--color-dark-3);
    border: 0;
    outline: 0;
    background-color: transparent;
}

.number:active {
    border: 1px solid #191D1E;
}

.c {
    background-color: var(--color-primary);
}

.equal {
    grid-column: 3 / 5;
    background-color: var(--color-secondary);
    font-size: 2.5rem;
}

.c,
.equal {
    color: white;
}

.operator {
    background-color: var(--color-secondary-dark);
    font-size: 2.5rem;
    color:#CA81F4;
}

.percent {
    font-size: 1.8rem;
}

.backspace {
    font-size: 2.2rem;
    padding-bottom: 1.5rem;
}