:root {
  --primary-color: #9d65c9;
  --body-bg: #d6efc7;
  --footer-bg: white;
  --font-color: black;
  --symbol-color: #12947f;
  --symbol-hover: #2fc4b2;
  --symbol-text: black;
  --hover-color: black;
  --header-color: white;
  --slider-before: black;

}

[data-theme="dark"] {
  --primary-color: #393e46;
  --footer-bg: black;
  --font-color: white;
  --header-color: black;
  --slider-before: white;
  --body-bg: white;
  --symbol-color: transparent;
}

/* root means universal - made variable */

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}
body {
    /* background-color: var(--primary-color); */
    font-family: 'Lato', sans-serif;
    background-image: url('image.jpg');
    background-repeat: no-repeat;
    background-size: cover;
}

.wrapper {
    display: flex;
    height: 100%;
    width: 100%;
    margin-top: 100px;
    justify-content: center;
    /* main axis is vertical */
}

.calculator {
    width: 300px;
    height: 500px;
    background-color: white;
    border-radius: 6px;
    box-shadow: 0px 0px 10px 3px rgba(0, 0, 0, 0.5);
    display: grid;
    grid-template-rows: 8% 25% auto;
    /* we are working with rows */
}

.calculator-header {
    display: flex;
    border-top-left-radius: 6px;
    border-top-right-radius: 6px;
    justify-content: flex-end;
    padding: 0 20px;
    background-color: var(--header-color);
}
.calculator-body {
    background-color: var(--body-bg);
    text-align: right;
    display: flex;
    justify-content: flex-end;
    align-items: flex-end;
    padding: 20px;
}
.calculator-footer{
    display: grid;
    grid-template-columns: auto auto auto auto;
    grid-template-rows: auto auto auto auto auto;
    grid-column-gap: 10px;
    grid-row-gap: 10px;
    justify-content: space-around;
    padding: 10px 0;
    border-bottom-left-radius: 6px;
    border-bottom-right-radius: 6px;
    /* rows dene toh do 5 baar auto likhkr */
    background-color: var(--footer-bg);
    transition: 0.4s all;
}

.calculator-footer div {
    display: flex;
    justify-content: center;
    align-items: center;
    font-weight: 900;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    font-size: 20px;
    color: var(--font-color);
}

.calculator-footer div.symbol {
    background-color: var(--symbol-color);
    color: white;
}

.calculator-footer div.symbol-dark {
    background-color: #127681;
    color: white;
}

.calculator-footer div:hover {
    cursor: pointer;
    background-color: #d4f3ef;
    color: var(--hover-color);
}

.calculator-footer div.symbol:hover {
    background-color: var(--symbol-hover);
    color: white;
}

.calculator-footer div.symbol-dark:hover{
    background-color: var(--symbol-hover);
    color: white;
}

/*slider switch css */
.theme-switch-wrapper {
    display: flex;
    align-items: center;
  }
  .theme-switch-wrapper em {
    margin-left: 10px;
    font-size: 1rem;
  }
  
  .theme-switch {
    display: inline-block;
    height: 16px;
    position: relative;
    width: 50px;
  }
  
  .theme-switch input {
    display: none;
  }
  
  .slider {
    background-color: #ccc;
    bottom: 0;
    cursor: pointer;
    left: 0;
    position: absolute;
    right: 0;
    top: 0;
    transition: 0.4s;
  }
  
  .slider:before {
    background-color: var(--slider-before); 
    content: "";
    bottom: -5px;
    height: 26px;
    /* left: 0px; */
    right: 25px;
    position: absolute;
    transition: 0.4s;
    width: 26px;
  }
  
  input:checked + .slider {
    background-color: #12947f;
  }
  
  input:checked + .slider:before {
    transform: translateX(26px);
  }
  
  .slider.round {
    border-radius: 34px;
  }
  
  .slider.round:before {
    border-radius: 50%;
  }