:root {
    --clr-body-bg: #08031A;
    --img-body-bg: url('/assets/starsforever.gif');
    --clr-body-txt: #fceaff;
    --clr-content-bg: #3d2163;

    --clr-main-heading: #ED64F5;
    --clr-sub-heading: #e8b86f;
    --clr-title-border: #d3aad5;
    --clr-bold-txt: #ff9933;
    --clr-link: #ED64F5;
    --clr-link-hover: #c355c9;
    --clr-quote-bg: #13092D;
    --clr-quote-border: #999999;

    --clr-code-bg: #241445;
    --clr-code-border: #82668f;
    --clr-dates: rgb(158, 203, 255);

    --clr-link-btn-bg: #873eb5;
    --clr-link-btn-txt: white;
    --clr-link-btn-hover: #241445;

    --clr-main-header-bg: black;
    --clr-navbar-bg: #222;
    --clr-navbar-link: white;

    --clr-main-footer-bg: #13092D;
}

@font-face {
    font-family: 'Nunito';
    src: url('/assets/fonts/Nunito-VariableFont_wght.ttf') format("truetype");
    font-weight: 125 950;
    font-stretch: 75% 125%;
    font-style: normal;
}

@font-face {
    font-family: 'Nunito';
    src: url('/assets/fonts/Nunito-Italic-VariableFont_wght.ttf') format("truetype");
    font-weight: 125 950;
    font-stretch: 75% 125%;
    font-style: italic;
}

/* CSS RESET */
/* Box sizing rules */
*,
*::before,
*::after {
    box-sizing: border-box;
}

/* Remove default margin */
body,
h1,
h2,
h3,
h4,
p,
figure,
blockquote,
dl,
dd {
    margin: 0;
}

/* Remove list styles on ul, ol elements with a list role, which suggests default styling will be removed */
ul[role='list'],
ol[role='list'] {
    list-style: none;
}

/* Set core root defaults */
html:focus-within {
    scroll-behavior: smooth;
}

/* Set core body defaults */
body {
    min-height: 100vh;
    text-rendering: optimizeSpeed;
    line-height: 1.5;
}

/* A elements that don't have a class get default styles */
a:not([class]) {
    text-decoration-skip-ink: auto;
}

/* Make images easier to work with */
img,
picture {
    max-width: 100%;
    display: block;
}

/* Inherit fonts for inputs and buttons */
input,
button,
textarea,
select {
    font: inherit;
}

/* Remove all animations, transitions and smooth scroll for people that prefer not to see them */
@media (prefers-reduced-motion: reduce) {
    html:focus-within {
        scroll-behavior: auto;
    }

    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* STYLING BEGINS */
body {
    display: flex;
    align-items: center;
    flex-direction: column;
    font-family: 'Nunito';
    color: var(--clr-body-txt);
    background-color: var(--clr-body-bg);
    background-image: var(--img-body-bg);
    background-attachment: fixed;
}

h1 {
    color: var(--clr-main-heading);
}

h1 {
    margin-bottom: 1.2rem;
}

h2, h3 {
    color: var(--clr-sub-heading);
}

h1 {
    font-size: 2.2rem;
    border-bottom: 0.18rem solid var(--clr-title-border);
}

h2 {
    font-size: 1.7rem;
}

article:not(.divided-article) h2,
article h3,
.content-section h3 {
    margin-top: 1.5rem;
}

p {
    padding: 0.5rem 0;;
}

strong {
    color: var(--clr-bold-txt);
}

a {
    font-weight: 700;
    color: var(--clr-link);
}

a:hover {
    color: var(--clr-link-hover);
}

blockquote {
    margin: 1.5rem 0;
	padding: 0.5rem 1rem;
	border-inline-start: 0.1rem solid var(--clr-main-heading);
    background-color: var(--clr-quote-bg);
}

button:hover {
    cursor: pointer;
}

pre {
    white-space: pre-wrap;
    overflow-x: auto;
}

summary {
    cursor: pointer;
}

/* ELEMENT STYLES WITH CUSTOM CLASSES */
.bold-text {
    font-weight: 700;
}

.center-el {
    margin: 0 auto;
}

.center-text {
    text-align: center;
}

.date-style {
    font-weight: 700;
    color: var(--clr-dates);
}

/* HEADER COMPONENT */
.main-header {
    width: 100%;
    max-height: 20rem;
    background-color: var(--clr-main-header-bg);
    display: flex;
    flex-direction: column;
    justify-content: center;
    text-align: center;
}

.main-header img {
    object-fit: contain;
    height: 100%;
}

/* NAVIGATION BAR COMPONENT */
nav {
    background: var(--clr-navbar-bg);
    padding: 0 0.6rem;
    width: 100%;
    z-index: 999;
}

nav a {
    color: var(--clr-navbar-link);
    text-decoration: none;
    cursor: pointer;
}

.nav__menu {
    list-style: none;
    padding: 0;
    display: flex;
    justify-content: space-evenly;
    flex-wrap: wrap;
    gap: 0.5rem;
}

/* Added to the navbar with JS when it reaches its scroll position */
.sticky-nav {
    position: fixed;
    width: 100%;
    top: 0;
}

/* Add some top padding to the page content to prevent sudden quick movement
as the navigation bar gets a new position at the top of the page
(position:fixed and top:0) */
.sticky-nav + main {
    padding-top: 3.75rem;
}

/* MAIN CONTENT */
main,
.content-container,
.divided-article {
    gap: 0.8rem;
    display: flex;
    flex-direction: column;
    width: 100%;
}

main {
    font-size: 1.2rem;
}

article:not(.divided-article),
.content-section,
.qna-section {
    background-color: var(--clr-content-bg);
    padding: 1.35rem;
}

.article-section {
    padding: 1.25rem 0;
}

aside {
    padding: 1rem;
    font-size: 0.9rem;
    background-color: var(--clr-content-bg);
}

article, .content-container {
    order: 1;
}

.sidebar--sticky {
    position: sticky;
    top: 5rem;
}

.left-sidebar {
    order: 2;
}

.right-sidebar {
    order: 3;
}

/* Tablet main content layout */
@media only screen and (min-width: 43.75rem) {
    main {
        flex-direction: row;
    }

    aside {
        width: 10rem;
    }

    article, .content-container {
        flex: 1;
        order: 2;
    }

    .left-sidebar {
        order: 1;
    }
    
    .right-sidebar {
        order: 3;
    }
}

/* Desktop main content layout */
@media only screen and (min-width: 60rem) {
    main {
        width: 60rem;
        display: flex;
        flex-direction: row;
        justify-content: center;
    }

    aside {
        width: 12rem;
    }
}

@media only screen and (min-width: 65rem) {
    main {
        width: 65rem;
    }
}

/* CUSTOM CLASSES FOR SPECIAL ELEMENTS */
.inline-code {
    font-family: monospace;
    border: 0.06rem solid var(--clr-code-border);
    padding: 0.125rem 0.3rem;
    margin-left: 0.125rem;
    margin-right: 0.125rem;
    background-color: var(--clr-code-bg);
}

.code-snippet {
    background-color: var(--clr-code-bg);
    border: 0.08rem solid var(--clr-code-border);
    display: block;
    padding: 0.5em 0.8rem;
    overflow-x: auto;
    word-break: keep-all;
}

.text-box {
    background-color: var(--clr-quote-bg);
    border: 0.06rem solid var(--clr-main-heading);
    padding: 0.625rem;
    margin-bottom: 0.8rem;
}

/* Link button */
.link-btn {
    font: 1.3rem 'Source Sans Pro', Arial, sans-serif;
    display: inline-block;
    border: 0.15rem solid var(--clr-link-btn-bg);
    border-radius: 0.6rem;
    padding: 0.75rem 1rem;
    margin: 0.3rem;
    background-color: var(--clr-link-btn-bg);
    color: var(--clr-link-btn-txt);
    cursor: pointer;
    font-weight: 700;
    text-transform: uppercase;
}

.link-btn,
.link-btn:hover,
.link-btn:visited {
    text-decoration: none;
}

.link-btn:hover {
    cursor: pointer;
    background-color: var(--clr-link-btn-hover);
    transition: 0.5s;
}

/* Q & A accordion */
.qna-accordion {
    margin: 1.5rem 0;
}

.qna-accordion__question {
    font-weight: 700;
}
.qna-accordion__answer {
    padding: 0.75rem 1.5rem;
    margin-top: 0.5rem;
    background: hsla(0, 0%, 100%, 0.15);
}

/* Embedded YouTube video */
.full-width-youtube-video {
    position: relative;
    padding-bottom: 56.25%;
    height: 0;
}

.full-width-youtube-video iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

/* Website link button */
.site-btn__container {
    display: flex;
    gap: 1rem;
    align-items: center;
    margin: 0.5rem 0;
}

.site-btn__textarea {
    width: 10rem;
    height: 2.5rem;
    font-size: 0.75rem;
    background-color:black;
    color: var(--clr-body-txt);
}

.copy-txt-btn {
    border: none;
    background: var(--clr-link-btn-bg);
    color: var(--clr-body-txt);
    padding: 0.3rem 0.8rem;
    border-radius: 0.5rem;
    font-size: 0.9rem;
    font-weight: bold;
}

.copy-txt-btn:hover {
    background: var(--clr-link-hover);
}

/* Web button lists */
.web-btn-wrapper {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

/* TABLE OF CONTENTS */
.sidebar__toc {
    position: sticky;
    top: 5rem;
}

.sidebar__toc-title {
    font-size: 1.3rem;
    font-weight: bold;
}

.sidebar__toc-list {
    list-style: none;
    margin-left: 0;
    padding-left: 0;
    font-size: 1rem;
}

.sidebar__toc-list li {
    margin-bottom: 0.5em;
}

.sidebar__toc-list ul {
    padding-left: 1.25rem;
}

/* REFERENCES LIST */
.references-list {
    font-size: 0.96em;
}

/* FOOTER COMPONENT */
.main-footer {
    background-color: var(--clr-main-footer-bg);
    width: 100%;
    padding: 0.5rem;
    text-align: center;
}

.main-footer p {
    padding: 0;
}