:root {
    --html-bg: #FFF1E9;
    --css-bg: #E0FDEF;
    --js-bg: #EBF0FF;
    --accessibility-bg: #F6E7FF;
    --text-color: #313E51;
    --text-color-p: #626C7F;
    --purple: #A729F5;
    --bg-col: white;
    --button-bg: white;
    --option-bg: #F4F6FA;
    --option-color: #626C7F;
    --correct-color: #26D782;
    --invalid-color: #EE5454;
    --bg: url("./assets/images/pattern-background-mobile-light.svg");
    --sun-src: url("./assets/images/icon-sun-dark.svg");
    --moon-src: url("./assets/images/icon-moon-dark.svg");
}

[data-theme="dark"] {
    --text-color: #FFF;
    --text-color-p: #ABC1E1;
    --bg-col: #313E51;
    --button-bg: #3B4D66;
    --bg: url("./assets/images/pattern-background-mobile-dark.svg");
    --sun-src: url("./assets/images/icon-sun-light.svg");
    --moon-src: url("./assets/images/icon-moon-light.svg");
}

/**************** begin css reset ****************/

html {
    box-sizing: border-box;
}

body {
    font-family: 'Rubik', sans-serif;
    background-color: var(--bg-col);
    background-image: var(--bg);
    background-repeat: no-repeat;
    background-size: cover;
}

*,
*::before,
*::after {
    box-sizing: inherit;
}

* {
    margin: 0;
}

img,
svg {
    display: block;
    max-width: 100%;
}

button {
    font: inherit;
}

/*************** End of css reset ****************/

/*************** Start Hide Other Screens ****************/
.start-menu {
    display: none;
}

.quiz-complete {
    display: none;
    flex-direction: column;
}

.question-screen {
    display: none;
    flex-direction: column;
}

.row-top {
    display: flex;
    justify-content: space-between;
    margin-bottom: 1rem;
}

.curr-subject {
    display: flex;
    align-items: center;
    visibility: hidden;
    gap: 1rem;
}

/*************** End Hide Other Screens ****************/

/*************** Start - Light / Dark Toggle Switch ****************/

.light-dark-toggle {
    display: flex;
    align-items: center;
    gap: .5rem;
}

.light-dark-switch {
    display: inline-block;
    position: relative;
    width: clamp(2rem, 1.647887323943662rem + 1.5023474178403755vw, 3rem);
    height: clamp(1.25rem, 1.073943661971831rem + 0.7511737089201878vw, 1.75rem);
}

.light-dark-switch input {
    display: none;
}

.slider {
    background-color: var(--purple);
    bottom: 0;
    cursor: pointer;
    left: 0;
    position: absolute;
    right: 0;
    top: 0;
    transition: .4s;
}

.slider:before {
    background-color: #fff;
    bottom: 4px;
    content: "";
    height: clamp(0.75rem, 0.573943661971831rem + 0.7511737089201878vw, 1.25rem);
    left: 4px;
    position: absolute;
    transition: .4s;
    width: clamp(0.75rem, 0.573943661971831rem + 0.7511737089201878vw, 1.25rem);
}

input:checked+.slider:before {
    transform: translateX(clamp(0.8125rem, 0.7033450704225352rem + 0.46572769953051646vw, 1.1225rem));
}

.slider.round {
    border-radius: 62.4375rem;
}

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

.sun-container,
.moon-container {
    width: clamp(1rem, 0.823943661971831rem + 0.7511737089201878vw, 1.5rem);
    height: clamp(1rem, 0.823943661971831rem + 0.7511737089201878vw, 1.5rem);
}

.sun-container>img {
    content: var(--sun-src);
}

.moon-container>img {
    content: var(--moon-src);
}

/*************** End - Light / Dark Toggle Switch ****************/
body {
    height: 100vh;
    display: flex;
    justify-content: center;
}

article {
    padding: 1rem 1.5rem;
}

h1 {
    color: var(--text-color);
    font-weight: 300;
    font-size: 2.5rem;
    font-size: clamp(2.5rem, 1.972rem + 2.25vw, 4rem);
}

h1>span {
    font-weight: 500;
}

h2 {
    color: var(--text-color);
    font-size: 1.125rem;
    font-size: clamp(1.125rem, 0.905rem + 0.939vw, 1.75rem);
    font-weight: 500;
}

.question {
    font-size: 1.25rem;
    font-size: clamp(1.25rem, 0.898rem + 1.502vw, 2.25rem);
}

p {
    color: var(--text-color-p);
    font-style: italic;
    font-weight: 400;
    margin-top: 1rem;
    margin-bottom: 2.5rem;
}

.progress-bar.whole {
    width: 100%;
    height: 1rem;
    background-color: white;
    margin-top: 1.5rem;
    margin-bottom: 2.5rem;
    padding: .25rem;
    border-radius: 62.4375rem;
}

.progress-bar.done {
    background-color: var(--purple);
    border-radius: 6.5rem;
    width: 0%;
    height: .5rem;
}

.choices {
    display: flex;
    flex-direction: column;
    gap: .75rem;
}

button {
    background-color: var(--button-bg);
    color: var(--text-color);
    font-size: 1.125rem;
    font-weight: 500;
    display: grid;
    grid-template-rows: 1fr;
    grid-template-columns: 1fr 3fr 1fr;
    align-items: center;
    justify-items: start;
    width: 100%;
    gap: 1rem;
    border-radius: .75rem;
    border: 0;
    padding: .75rem;
    box-shadow: 0px 16px 40px 0px rgba(143, 160, 193, .14);
}

button:hover {
    cursor: pointer;
}

.option {
    border: 3px solid transparent;
}

.submit-answer,
.restart {
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--purple);
    color: white;
}

.submit-answer:hover,
.restart:hover {
    background: linear-gradient(0deg, rgba(255, 255, 255, .5) 0%, rgba(255, 255, 255, 0.50) 100%), var(--purple);
}

.button-icon-container>img {
    border-radius: .75rem;
    padding: .15rem;
}

.button-icon-container>img[src="./assets/images/icon-html.svg"] {
    background-color: var(--html-bg);
}

.button-icon-container>img[src="./assets/images/icon-css.svg"] {
    background-color: var(--css-bg);
}

.button-icon-container>img[src="./assets/images/icon-js.svg"] {
    background-color: var(--js-bg);
}

.button-icon-container>img[src="./assets/images/icon-accessibility.svg"] {
    background-color: var(--accessibility-bg);
}

.option-box {
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--option-color);
    width: 2.5rem;
    height: 2.5rem;
    border-radius: .75rem;
    background-color: var(--option-bg);
}

.select-prompt {
    display: flex;
    align-items: center;
    justify-content: center;
    visibility: hidden;
    gap: 1rem;
}

.select-prompt>p {
    color: var(--invalid-color);
    margin: 0;
    font-style: normal;
}

.selected-box {
    background-color: var(--purple);
    color: white;
}

.selected {
    border-color: var(--purple);
}

.correct-box {
    background-color: var(--correct-color);
    color: white;
}

.correct {
    border-color: var(--correct-color);
}

.correct-icon {
    justify-self: end;
}

.invalid-box {
    background-color: var(--invalid-color);
    color: white;
}

.invalid {
    border-color: var(--invalid-color);
}

.invalid-icon {
    justify-self: end;
}

.question-count {
    margin-top: 0;
}

.left-content {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.start-menu>.left-content {
    justify-content: flex-start;
    gap: 3rem;
}

.visible {
    display: block;
}

.score-container {
    background: var(--bg-col);
    color: var(--text-color);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 2rem;
    margin-top: 2.5rem;
    border-radius: 1.5rem;
    padding: 2rem;
}

.score-container>p {
    margin: 0;
}

.scored {
    font-weight: 500;
}

.score-out-of {
    font-style: normal;
}

.final-score {
    font-weight: 500;
    font-size: clamp(5.5rem, 4.268rem + 5.258vw, 9rem);
    text-align: center;
    font-style: normal;
}

@media (min-width: 768px) {
    button {
        font-size: 1.75rem;
    }

    article {
        padding: 2.5rem 4rem;
    }

    .question-screen {
        flex-direction: column;
    }

    .quiz-complete {
        flex-direction: column;
    }

    .row-top {
        margin-bottom: 0;
    }

    h1 {
        width: 29rem;
    }
}

@media (min-width: 1440px) {

    body {
        align-items: center;
    }

    .left-content {
        max-width: 35rem;
    }

    .visible {
        display: flex;
    }

    .start-menu {
        justify-content: space-between;
        gap: 10rem;
    }

    .question-screen {
        flex-direction: row;
        gap: 10rem;
    }

    .quiz-complete {
        flex-direction: row;
        gap: 10rem;
    }

    .choices {
        width: 35rem;
        height: 28rem;
        gap: 1.5rem;
    }
}
html, body {
  height: 100%;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
}
main {
  flex: 1;
}
.footer {
  text-align: left;
  padding: 2rem 3rem;
  font-size: 0.9rem;
  color: #ccc;
}