@import url('https://fonts.googleapis.com/css2?family=Rubik:wght@300;400;500&display=swap');
@import url('https://fonts.googleapis.com/css2?family=Montserrat&display=swap');
* {
    margin: 0px;
    padding: 0px;
    box-sizing: border-box;
    font-family: 'Rubik', sans-serif;
}

/* light mode */
:root {
    --base-color: #fff;
    --main-text-color: rgba(239,45,79,255);
    --button-color: rgba(230,230,230,255);
    --button-text-clr: #000;
    --clr-button-function: rgba(51,51,51,255);
    --text-button-function: #fff;
}

.dark-mode {
    --base-color: rgba(24,24,24,255);
    --main-text-color: #fff;
    --button-color: rgba(51,51,51,255);
    --button-text-clr: #fff;
    --clr-button-function: rgba(230,230,230,255);
    --text-button-function: #000;
}

body {
    display: flex;
    justify-content: center;
    align-items: center;
    background: rgba(239,45,79,255);
}

.calculator {
    position: relative;
    margin: 50px 100px 50px 100px;
    padding: 10px 22px 20px 22px;
    display: flex;
    flex-direction: column;
    align-items: center;
    height: 539px;
    min-height: 539px;
    min-width: 308px;
    background: var(--base-color);
    border: #fff;
    border-radius: 28px;
    box-shadow: rgba(0, 0, 0, 0.09) 0px 2px 1px, rgba(0, 0, 0, 0.09) 0px 4px 2px, rgba(0, 0, 0, 0.09) 0px 8px 4px, rgba(0, 0, 0, 0.09) 0px 16px 8px, rgba(0, 0, 0, 0.09) 0px 32px 16px;
    transition: 0.07s;
}

.calculator-screen {
    flex: 1;
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    width: 100%;
}

.calculator-name {
    position: absolute;
    flex: 0.1;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    font-weight: 300;
    color: var(--main-text-color);
}
div[data-line='line'], div[data-line='line2'] {
    position: absolute;
    width: 100%;
    height: 2.3px;
    border: transparent;
    border-radius: 5px;
}
div[data-line='line'] {
    top: 16px;
    background: rgba(204,204,204,255);
}
div[data-line='line2'] {
    bottom: -1px;
    background: rgba(230,230,230,255);
}

.indicator {
    position: absolute;
    top: 15px;
    height: 5px;
    width: 130px;
    background: rgba(238,46,78,255);
    border: transparent;
    border-radius: 10px;
    z-index: 1;
}
.screen-container {
    flex: 1;
    width: 100%;
    height: 100%;
    display: flex;
}

.switch-mode-container {
    width: 20px;
    display: flex;
    justify-content: start;
    align-items: center;
}

.switch {
    position: relative;
    display: flex;
    width: 19.2px;
    height: 40px;
}

.switch input { 
    opacity: 0;
    width: 0;
    height: 0;
}

.slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: #ccc;
    -webkit-transition: .4s;
    transition: .4s;
}

.slider:before {
    position: absolute;
    content: "";
    height: 12.8px;
    width: 12.8px;
    right: 3.2px;
    top: 3.2px;
    background-color: white;
    -webkit-transition: .4s;
    transition: .4s;
}

input:checked + .slider {
    background-color: #ef2d4f;
}

input:focus + .slider {
    box-shadow: 0 0 1px transparent;
}

input:checked + .slider:before {
    -webkit-transform: translateY(20.8px);
    -ms-transform: translateY(20.8px);
    transform: translateY(20.8px);
}

.slider.round {
    border-radius: 34px;
}

.slider.round:before {
    border-radius: 50%;
}

#screen {
    flex: 7;
    display: flex;
    justify-content: flex-end;
    align-items: flex-end;
    padding-bottom: 10px;
    max-width: 235px;
    font-weight: 500;
    font-size: 40px;
    color: var(--main-text-color);
    overflow: hidden;
}


.calculator-buttons {
    flex: 2;
    max-width: 264px;
    padding-top: 10px;
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    grid-template-rows: repeat(5, minmax(0, 1fr));
    grid-gap: 10px 20px;
    grid-template-areas:
        "clear sign percentage divide"
        "seven eight nine multiply"
        "four five six subtract"
        "one two three add"
        "zero zero dot equal";
}

button {
    display:block;
    height: 45px;
    width: 45px;
    border-radius: 50%;
    border: 1px transparent;
    justify-self: center;
    align-self: center;
    outline: none;
    font-size: 24px;
    background: var(--button-color);
    color: var(--button-text-clr);
    cursor: pointer;
    transition: 0.3s;
}

.button-click {
    filter: brightness(1.6);
}
.button-click-light {
    filter: brightness(0.8);
}

#clear {
    font-family: 'Montserrat', sans-serif;
    font-weight: 600;
}

#sign {
    font-size: 15px;
    font-weight: 700;
}
#divide {
    grid-area: divide;
}

#multiply {
    grid-area: multiply;
}

#subtract {
    grid-area: subtract;
}
#add {
    grid-area: add;
}

.zero {
    grid-area: zero;
    width: 115px;
    border-radius: 25px;
    text-align: left;
    padding-left: 15px;
}

#dot {
    grid-area: dot;
}

#equal {
    grid-area: equal;
}
#delete {
    visibility: hidden;
}

.misc {
    background: var(--clr-button-function);
    color: var(--text-button-function);
}

.operator-button {
    background: #ef2d4f;
    color: white;
}

@media only screen and (max-width: 450px) { 
    .calculator {
        margin: 20px;
        margin-bottom: 30px;
        height: 100vh;
        width: 100vw;
    }
    .calculator-buttons {
        min-width: 100%;
    }
}