@font-face {
    font-family: OleoScript;
    src: url("../fonts/OleoScript-Regular.ttf");
}

@font-face {
    font-family: Roboto;
    src: url("../fonts/Roboto-Regular.ttf");
}

@font-face {
    font-family: Arsenal;
    src: url("../fonts/Arsenal-Regular.ttf");
}

:root {
    --text: #000000;
    --text-bg: #FFFFFF;
    --edges: #E7E7E7;
    --divider: var(--edges);
    --panel-bg: #373737;
    --content-bg: #FAFAFA;
    --content-bg-red: #FEFAFA;
    --content-bg-orange: #FFF9EF;
    --content-bg-blue: #F4FCFF;
    --content-bg-green: #F4FFF9;
    --accent-red: #EB5757;
    --accent-orange: #F4A919;
    --accent-green: #39C26F;
    --accent-blue: #2D9CDB;
    --accent-bg-red: #FFF4F4;
    --accent-bg-orange: #FFFEF4;
    --accent-bg-green: #F4FFF9;
    --accent-bg-blue: #F4FCFF;

    /* Transition theme changes */
    transition: color 0.2s, background-color 0.2s;
}

@media screen and (prefers-color-scheme: dark) {
    :root {
        --text: #E7E7E7;
        --text-bg: #373737;
        --edges: #E7E7E7;
        --divider: #2A2A2A;
        --panel-bg: #2d2d2d;
        --content-bg: #2d2d2d;
        --content-bg-red: var(--content-bg);
        --content-bg-orange: var(--content-bg);
        --content-bg-blue: var(--content-bg);
        --content-bg-green: var(--content-bg);
        --accent-red: #EB5757;
        --accent-orange: #F4A919;
        --accent-green: #39C26F;
        --accent-blue: #2D9CDB;
        --accent-bg-red: var(--text-bg);
        --accent-bg-orange: var(--text-bg);
        --accent-bg-green: var(--text-bg);
        --accent-bg-blue: var(--text-bg);
    }
}

/* Utilities */
.shadow {
    filter: drop-shadow(0px 2px 2px rgba(0, 0, 0, 0.25));
}

.accent-red {
    --accent-color: var(--accent-red);
}

.accent-orange {
    --accent-color: var(--accent-orange);
}

.accent-green {
    --accent-color: var(--accent-green);
}

.accent-blue {
    --accent-color: var(--accent-blue);
}

/* Page */
.page-bg {
    background-color: var(--content-bg);
}

.page-bg-red {
    background-color: var(--content-bg-red)
}

.page-bg-orange {
    background-color: var(--content-bg-orange)
}

.page-bg-green {
    background-color: var(--content-bg-green)
}

.page-bg-blue {
    background-color: var(--content-bg-blue)
}

html {
    font-size: 20px;
    font-family: Roboto, Arial;
    color: var(--text);
    scroll-behavior: smooth;
}

body {
    display: flex;
    flex-direction: column;
    align-items: center;
    margin: 10px;
}

/* Header */
header {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    margin-bottom: 0.5rem;
}

header a {
    text-decoration: none;
    color: var(--text);
}

header a h1 {
    font-size: 2.5rem;
    font-family: OleoScript, 'Times New Roman', Times, serif;
    margin: 0;
    margin-right: 1rem;
}

header span {
    font-size: 1.5rem;
    font-family: OleoScript, 'Times New Roman', Times, serif;
}

/* Navigation */
.nav-accent-red {
    --accent-color: var(--accent-red);
    --inactive-bg: var(--accent-bg-red);
    --inactive-content: var(--accent-red);
}

.nav-accent-red:hover,
.nav-accent-red.active {
    --inactive-bg: var(--accent-red);
    --inactive-content: var(--text-bg);
}

.nav-accent-orange {
    --accent-color: var(--accent-orange);
    --inactive-bg: var(--accent-bg-orange);
    --inactive-content: var(--accent-orange);
}

.nav-accent-orange:hover,
.nav-accent-orange.active {
    --inactive-bg: var(--accent-orange);
    --inactive-content: var(--text-bg);
}

.nav-accent-green {
    --accent-color: var(--accent-green);
    --inactive-bg: var(--accent-bg-green);
    --inactive-content: var(--accent-green);
}

.nav-accent-green:hover,
.nav-accent-green.active {
    --inactive-bg: var(--accent-green);
    --inactive-content: var(--text-bg);
}

.nav-accent-blue {
    --accent-color: var(--accent-blue);
    --inactive-bg: var(--accent-bg-blue);
    --inactive-content: var(--accent-blue);
}

.nav-accent-blue:hover,
.nav-accent-blue.active {
    --inactive-bg: var(--accent-blue);
    --inactive-content: var(--text-bg);
}

body>nav {
    display: grid;
    grid-template-rows: repeat(4, 1fr);
    gap: 10px;
}

body>nav>a {
    display: flex;
    padding: 10px;
    gap: 10px;

    font-family: Arial, Helvetica, sans-serif;
    font-weight: 700;
    font-size: 1.2rem;
    text-decoration: none;

    background-color: var(--inactive-bg);
    color: var(--inactive-content);
    fill: var(--inactive-content);
    border-color: var(--accent-color);
    border-style: solid;
    border-width: 4px;
    border-radius: 15px;
    transition: color 0.2s, fill 0.2s, background-color 0.2s;
}

body>nav>a>* {
    filter: drop-shadow(0px 1px 1px rgba(0, 0, 0, 0.25));
}

body>nav>a>svg {
    display: inline-block;
    height: 1.4rem;
}

@media screen and (min-width: 640px) {
    body>nav {
        display: grid;
        grid-template-rows: 1fr;
        grid-template-columns: repeat(4, 1fr);
    }

    body>nav>a {
        flex-direction: column;
        justify-content: center;
        align-items: center;
        gap: 15px;
        font-size: 0.8rem;
        aspect-ratio: 1/1;
    }

    body>nav>a>svg {
        height: 70%;
    }
}

@media screen and (min-width: 768px) {
    body>nav>a {
        font-size: 1rem;
    }
}

@media screen and (min-width: 1024px) {
    body>nav>a {
        font-size: 1.3rem;
    }
}

/* Main content */
main {
    box-sizing: border-box;
    background-color: var(--text-bg);
    border-radius: 15px 15px 0px 0px;
    /* padding: 20px 0px; */
    margin-top: 10px;

    /* font-family: Arial, Helvetica, sans-serif; */
}

main h2 {
    margin: 0;
    font-weight: 700;
    font-size: 1.5rem;
}

main article {
    padding: 1.5rem;
}

@media screen and (min-width: 768px) {
    main article {
        padding: 1.5rem 2rem;
    }
}

main article:not(:first-child),
footer {
    border-top: 2px solid var(--divider);
}

main article>a:first-child,
main article>h3:first-child {
    display: flex;
    align-items: center;
    gap: 20px;
    text-decoration: none;
    font-weight: 500;
    color: var(--text);
    transition: color 0.2s;
}

main article>a:first-child:hover {
    color: var(--accent-color);
}

main article>a:first-child>h3,
main article>h3:first-child {
    display: inline;
    margin: 0;
    font-size: 1.3rem;
}

main article>a:first-child>h3 {
    text-decoration: underline;
}

main article>a:first-child>span {
    font-weight: 800;
    font-family: Arsenal;
    line-height: 1.3rem;
    font-size: 2rem;
    color: var(--accent-color);
    transition: padding 0.2s;
}

main article>a:first-child:hover>span {
    padding-left: 0.75rem;
}

main article>p {
    margin-top: 1rem;
}

main article>p a {
    color: var(--accent-color);
}

/* Footer */

footer {
    box-sizing: border-box;
    /* border-top: 2px solid var(--edges); */
    background-color: var(--panel-bg);
    color: var(--edges);
    border-radius: 0px 0px 15px 15px;
    display: grid;
    grid-template-columns: 1fr;
    padding: 1rem;
    gap: 0.5rem;
    font-size: 0.9rem;
}

footer a {
    color: inherit;
    transition: color 0.2s;
}

footer a:hover {
    color: var(--accent-color);
}

footer ul {
    list-style-type: none;
    margin: 0;
}

footer section>ul {
    padding-left: 0px;
}

footer section ul>li>ul {
    padding-left: 0.5rem;
}

@media screen and (min-width: 768px) {
    footer {
        grid-template-columns: repeat(2, 1fr);
        padding: 1rem 2rem;
    }
}

@media screen and (min-width: 1024px) {
    footer {
        grid-template-columns: repeat(5, 1fr);
    }
}

/* Interactive sections */
main>section.interactive-panel {
    display: grid;
    gap: 1rem;
    grid-template-columns: 1fr;
    background-color: var(--panel-bg);
    color: var(--edges);
    padding: 1rem;
}

@media screen and (min-width: 768px) {
    main>section.interactive-panel {
        grid-template-columns: repeat(2, 1fr);
        padding: 1rem 2rem;
    }
}

.interactive-panel>.interactive-panel-preview {
    box-sizing: border-box;
    background-color: var(--text-bg);
    color: var(--text);
    min-height: 10rem;
    border-radius: 15px;
    overflow: hidden;
}

.interactive-panel>.interactive-panel-preview.center {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 0.5rem;
}

.interactive-panel-controls {
    display: grid;
    gap: 1rem;
    grid-template-columns: repeat(2, 1fr);
    align-items: start;
    height: min-content;
}

.interactive-panel-controls .control-group-title {
    font-weight: 800;
    font-size: 1.2rem;
    grid-column: 1 / 3;
}

.interactive-panel-controls .control-group {
    display: grid;
    gap: 0.25rem;
    grid-template-columns: 1fr auto;
    align-items: center;
}

.interactive-panel-controls .both-columns {
    grid-column: 1 / 3;
}

input[type="range"] {
    grid-column: 1 / 3;
    appearance: none;
    height: 0.5rem;
    background-color: var(--edges);
    border-radius: 0.25rem;
    margin: 0.5rem 0;
}


input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 1.5rem;
    height: 1.5rem;
    border-radius: 1rem;
    border-width: 3px;
    border-style: solid;
    background-color: var(--edges);
    border-color: var(--panel-bg);
    cursor: pointer;
}

input[type="range"]::-moz-range-thumb {
    width: 1.2rem;
    height: 1.2rem;
    border-radius: 1rem;
    border-width: 3px;
    background-color: var(--edges);
    border-color: var(--panel-bg);
    cursor: pointer;
    transition: border-color 0.2s;
}

input[type="range"]:active::-moz-range-thumb,
input[type="range"]:active::-webkit-slider-thumb {
    border-color: var(--accent-green);
}


.interactive-panel-controls .control-group input[type="color"] {
    border: 2px solid var(--edges);
    appearance: none;
    width: 32px;
    height: 32px;
    cursor: pointer;
}

.control-group input[type="checkbox"] {
    height: 0;
    border-width: 0;
    margin: 0;
    opacity: 0;
    appearance: none;
}

input[type="checkbox"]+label.toggle-switch {
    display: block;
    grid-row: 1;
    grid-column: 2/3;
    overflow: hidden;
    width: 4rem;
    height: 1.5rem;
    background-color: var(--accent-red);
    transition: all 0.2s;
    cursor: pointer;
    border-radius: 15px;
    user-select: none;
}

input[type="checkbox"]:checked+label.toggle-switch {
    background-color: var(--accent-green);
}

input[type="checkbox"]+label.toggle-switch::before {
    display: block;
    content: "";
    margin: 0.25rem 0 0 0.25rem;
    width: 1rem;
    height: 1rem;
    background-color: var(--text-bg);
    transition: inherit;
    border-radius: 15px;
}

input[type="checkbox"]:checked+label.toggle-switch::before {
    margin: 0.25rem 0 0 2.75rem;
}

input[type="checkbox"]+label.toggle-switch::after {
    font-size: 0.9rem;
    text-align: center;
    padding-top: 0.15rem;
    display: block;
    width: 4rem;
    height: 1.5rem;
    color: var(--text-bg);
    content: "off";
    margin-top: -1.25rem;
}

input[type="checkbox"]:checked+label.toggle-switch::after {
    content: "on";
}

.interactive-panel .control-group input[type="button"] {
    border: 3px solid var(--accent-green);
    border-radius: 5px;
    background-color: transparent;
    color: var(--accent-green);
    font-size: 1rem;
    cursor: pointer;
    padding: 0.6rem;
    transition: background-color 0.2s, border-color 0.2s;
}

.interactive-panel .control-group input[type="button"]:active {
    border-color: var(--panel-bg);
}

.interactive-panel .control-group input[type="button"]:hover {
    background-color: var(--accent-green);
    color: var(--panel-bg);
}

.interactive-panel .control-group input[type="button"].cancel {
    border: 3px solid var(--accent-red);
    color: var(--accent-red);
}

.interactive-panel .control-group input[type="button"].cancel:active {
    border-color: var(--panel-bg);
}

.interactive-panel .control-group input[type="button"].cancel:hover {
    background-color: var(--accent-red);
    color: var(--panel-bg);
}

.interactive-panel-controls textarea {
    font-size: 0.8rem;
    font-family: inherit;
    height: 3rem;
    resize: none;
    border-radius: 15px;
    padding: 15px;
}

#operable-keyboard-shortcuts .interactive-panel-preview input:focus {
    outline: 3px solid var(--accent-blue);
}

#robust-assistive .interactive-panel-preview {
    padding: 0.5rem;
}

#robust-assistive .interactive-panel-preview h2 {
    font-size: 2rem;
}

/* Page container */
body>* {
    width: 100%;
}

@media screen and (min-width: 640px) {
    body>* {
        max-width: 640px;
    }
}

@media screen and (min-width: 768px) {
    body>* {
        max-width: 768px;
    }

}

@media screen and (min-width: 1000px) {
    body>* {
        max-width: 1000px;
        /* max-width: 768px; */
    }
}

/* @media screen and (min-width: 1280px) {
    body>* {
        max-width: 1024px;
    }
} */

/* @media screen and (min-width: 1536px) {
    body>* {
        max-width: 1536px;
    }
} */