/* Attribution Styles */
.attribution { 
    font-size: 12px; 
    text-align: center; 
    margin-top: 20px;
}
.attribution a {
    color: hsl(78, 100%, 58%); 
}

/* General Body Styles */
body {
    background-color: hsla(224, 26%, 31%, 1);
    color: hsla(224, 26%, 100%, 1);
    display: flex;
    flex-direction: column;
    height: 100vh;
    justify-content: center;
    align-items: center;
}

.calculator {
    font-family: 'Tahoma', sans-serif;
    font-weight: 600;
    max-width: 420px;
    min-width: 300px;
    box-sizing: border-box;
}

.title-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    padding-left: 15px;
    margin-bottom: 15px;
}

.title {
    font-size: 18px;
}

.theme h3 {
    font-size: 10px;
}

.theme {
    display: flex;
    flex-direction: row;
    align-items: center;
}

.theme-selector {
    display: flex;
    align-items: center;
    position: relative;
    margin-left: 10px; /* Adds some space between theme label and slider */
}

.theme-selector input[type="radio"] {
    position: absolute; /* Ensure radio buttons are positioned correctly */
    opacity: 0; /* Hide radio buttons */
    width: 0;
    height: 0;
}

.theme-selector .slider {
    position: relative;
    width: 60px;
    margin-right: 10px;
    height: 25px;
    background-color: hsla(224, 35%, 15%, 0.6);
    border-radius: 15px;
    cursor: pointer; /* Change cursor to pointer to indicate it is clickable */
}

.theme-selector .slider::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 5px; /* Default position for theme 1 */
    transform: translateY(-50%);
    width: 15px;
    height: 15px;
    background-color: white; /* Default color for the slider knob */
    border-radius: 50%;
    transition: left 0.3s ease;
}

/* Positioning for different themes */
body.theme1 .slider::before {
    left: 5px; /* Positioning for theme 1 */
}
body.theme2 .slider::before {
    left: calc(50% - 7.5px); /* Positioning for theme 2 */
}
body.theme3 .slider::before {
    left: calc(100% - 20px); /* Positioning for theme 3 */
}

#display {
    width: 100%;
    height: 100px;
    border: none;
    background-color: hsla(224, 35%, 15%, 1);
    color: hsla(224, 26%, 100%, 1);
    padding: 20px;
    border-radius: 10px;
    margin: 1vh;
    font-size: 40px;
    font-weight: 750;
    overflow: hidden;
    text-align: right;
    box-sizing: border-box;
}

.buttons {
    padding: 20px 20px;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px; /* Ensures both horizontal and vertical gaps */
    width: 100%;
    background-color: hsla(225, 30%, 21%, 1);
    border: none;
    border-radius: 10px;
    margin: 1vh;
    box-sizing: border-box;
}

.btn {
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-family: 'Tahoma', sans-serif;
    font-weight: 900;
    font-size: 30px;
    background-color: hsla(225, 30%, 100%, 1);
    max-width: 80px;
    height: 60px; /* Allow height to adjust automatically */
    padding: 20px 0; /* Padding to adjust size */
    color: hsla(225, 30%, 21%, 0.8);
    box-shadow: 0px 3px 0px 0px rgba(255, 255, 255, 0.8);
    display: flex;
    justify-content: center;
    align-items: center;
}

.btn:hover {
    transform: scale(1.05);
    filter: brightness(150%);
}

.del, .reset {
    color: white;
    font-size: 24px;
    font-weight: 600;
    background-color: hsla(224, 21%, 50%, 1);
}

.del:hover, .reset:hover {
    background-color: hsla(224, 21%, 55%, 1);
}

.del:active, .reset:active {
    background-color: hsla(224, 21%, 65%, 1);
}

.equals {
    color: white;
    font-size: 18px;
    background-color: hsla(6, 64%, 50%, 1);
}

.equals, .reset {
    max-width: 100%;
    grid-column: span 2;
}

.equals:hover {
    filter: brightness(200%);
}

.equals:active {
    background-color: hsla(6, 64%, 65%, 1);
}

@media only screen and (max-width: 768px) {

    .calculator {
        min-width: 70%; /* Slightly reduce minimum width */
        box-sizing: border-box;
    }

    .buttons {
        justify-content: center;
        gap: 15px 10px; /* Adjusted gap for smaller screens */
    }

    .btn {
        min-width: 50px;
        max-height: 75px;
        width: calc((100% - 15px)); /* Adjust width to maintain square aspect ratio */
        height: calc((100%)); /* Ensure height matches width for square shape */
    }

    .equals, .reset {
        grid-column: span 2;
    }
}

/* Default Theme (Theme 1) */
body.theme1 {
    background-color: hsla(224, 26%, 31%, 1);
    color: hsla(224, 26%, 100%, 1);
}
.calculator.theme1 .buttons {
    background-color: hsla(225, 30%, 21%, 1);
}
.calculator.theme1 .btn {
    background-color: hsla(225, 30%, 100%, 1);
    color: hsla(225, 30%, 21%, 0.8);
}
.calculator.theme1 .btn.del, .calculator.theme1 .btn.reset {
    background-color: hsla(224, 21%, 50%, 1);
    color: white;
}
.calculator.theme1 .btn.equals {
    background-color: hsla(6, 64%, 50%, 1);
    color: white;
}

/* Theme 2 */
body.theme2 {
    background-color: hsla(0, 0%, 90%, 1);
    color: hsla(53, 9%, 20%, 1);
}

.calculator.theme2 .buttons {
    background-color: hsla(12, 5%, 81%, 1);
}
.calculator.theme2 .btn {
    background-color: hsl(0, 0%, 90%);
    color: hsl(0, 0%, 20%);
    box-shadow: 0px 3px 0px 0px rgba(133, 133, 133, 0.8);
}
.calculator.theme2 .btn.del, .calculator.theme2 .btn.reset {
    background-color: hsla(185, 41%, 37%, 1);
    color: white;
}
.calculator.theme2 .btn.equals {
    background-color: hsl(0, 50%, 50%);
    color: white;
}

/* Theme 3 */
body.theme3 {
    background-color: hsla(268, 75%, 9%, 1);
    color: hsla(51, 99%, 63%, 1);
}
.calculator.theme3 .buttons {
    background-color:hsla(269, 74%, 12%, 1) ;
}
.calculator.theme3 .btn {
    background-color: hsla(269, 48%, 20%, 1);
    color: hsla(51, 99%, 63%, 1);
    box-shadow: 0px 3px 0px 0px hsla(284, 79%, 21%, 1);
}
.calculator.theme3 .btn.del, .calculator.theme3 .btn.reset {
    background-color: hsla(281, 89%, 26%, 1);
    color: white;
}
.calculator.theme3 .btn.equals {
    background-color: hsla(176, 100%, 44%, 1);
    color: rgb(0, 0, 0);
}