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

li
{
    list-style: none;
}

body
{
    display: flex;
    flex-direction: column;
    align-items: center;
}

.calculator
{
    display: flex;
    flex-direction: column;
    width: 450px;
    height: 750px;
    border: 1px solid black;
    padding: 20px;
    gap: 15px;
    background-color: #F0F0F0;
    box-shadow: 0 0px 8px rgba(150, 150, 150, 1);
}



.calc-buttons
{
    display: flex;
    flex-direction: column;
    flex: 1;
    gap: 5px;
}

.calc-clear
{
    flex: 1;
    display: flex;
}

.calc-clear button
{
    flex: 1;
    background-color: #DDDDDD;
    border-radius: 8px;
}

.calc-clear button:active
{
    background-color: #FAFAFA; 
}


.main-calc-buttons
{
    flex: 12;
    display: flex;
    gap: 5px;
}

.calc-nums
{
    display: flex;
    flex-direction: column;
    gap: 2px;
    flex: 3;
}

#calc-text
{
    flex: 1;
    font-size: 35px;
}

.calc-buttons
{
    flex: 7;
}

.calc-operators
{
    display: flex;
    flex: 1;
    flex-direction: column;
    gap: 2px;
}

.calc-operators li
{
    flex: 1;
    display: flex;
}

.calc-operators li button
{
    border-radius: 12px;
    background-color: #FFCC00;
    flex: 1;
}


.calc-first-row,
.calc-second-row,
.calc-third-row,
.calc-fourth-row
{
    display: flex;
    flex: 1;
    gap: 2px;
}

.calc-nums .calc-first-row li,
.calc-nums .calc-second-row li,
.calc-nums .calc-third-row li
{
    display: flex;
    flex: 1;
}

.calc-first-row li button,
.calc-second-row li button,
.calc-third-row li button
{
    border-radius: 12px;
    background-color: #FAFAFA;
    flex: 1;
}

.calc-first-row li button:active,
.calc-second-row li button:active,
.calc-third-row li button:active
{
    background-color: #DDDDDD;
}

.calc-fourth-row li 
{
    display: flex;
    flex: 1;
}

button:hover
{
    cursor: pointer;
}

.calc-fourth-row li button
{
    border-radius: 12px;
    background-color: #FAFAFA;
    flex: 1;
}
.calc-fourth-row li button:active
{
    background-color: #DDDDDD;
}

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

input[type="number"] {
    -moz-appearance: textfield;
}