:root {
    --width: 800px;
    --font-main: Verdana, sans-serif;
    --font-secondary: Verdana, sans-serif;
    --font-scale: 1em;
    --background-color: #fff;
    --heading-color: #222;
    --text-color: #444;
    --link-color: #3273dc;
    --visited-color: #8b6fcb;
    --code-background-color: #f2f2f2;
    --code-color: #222;
    --blockquote-color: #222;
    --hr-color-top: #eee;
    --hr-color-bottom: #fff;
    --post-title-color: #228;
}

@media (prefers-color-scheme: dark) {
    :root {
        --background-color: #01242e;
        --heading-color: #eee;
        --text-color: #ddd;
        --link-color: #8cc2dd;
        --visited-color: #8b6fcb;
        --code-background-color: #000;
        --code-color: #ddd;
        --blockquote-color: #ccc;
        --hr-color-top: #333;
        --hr-color-bottom: #000;
        --post-title-color: #c8c8ff;
    }
}

body {
    font-family: var(--font-secondary);
    font-size: var(--font-scale);
    margin: auto;
    padding: 20px;
    max-width: var(--width);
    text-align: left;
    background-color: var(--background-color);
    word-wrap: break-word;
    overflow-wrap: break-word;
    line-height: 1.5;
    color: var(--text-color);
}

h1,
h2,
h3,
h4,
h5,
h6 {
    font-family: var(--font-main);
    color: var(--heading-color);
}

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

a:hover {
    text-decoration: underline;
}

nav a {
    margin-right: 8px;
}

nav span.active {
    font-weight: bold;
    margin-right: 10px;
}
strong,
b {
    color: var(--heading-color);
}

button {
    margin: 0;
    cursor: pointer;
}

main {
    line-height: 1.6;
}

table {
    width: 100%;
}

hr {
    border: 0;
    border-top: 1px dashed;
}

img {
    max-width: 100%;
}

pre code {
    background-color: var(--code-background-color);
    color: var(--code-color);
    display: block;
    padding: 20px;
    white-space: pre-wrap;
    font-size: 0.875rem;
    overflow-x: auto;
}

code {
    font-family: monospace;
    padding: 2px;
    background-color: var(--code-background-color);
    color: var(--code-color);
    border-radius: 3px;
}

blockquote {
    border-left: 1px solid #999;
    color: var(--code-color);
    padding-left: 20px;
    font-style: italic;
}

footer {
    padding: 25px 0;
    text-align: center;
}

.title:hover {
    text-decoration: none;
}

.title h1 {
    font-size: 1.5em;
}

.inline {
    width: auto !important;
}

.highlight,
.code {
    padding: 1px 15px;
    background-color: var(--code-background-color);
    color: var(--code-color);
    border-radius: 3px;
    margin-block-start: 1em;
    margin-block-end: 1em;
    overflow-x: auto;
}

/* blog post list */
ul.blog-posts {
    list-style-type: none;
    padding: unset;
}

ul.blog-posts li {
    display: flex;
}

ul.blog-posts li span {
    flex: 0 0 130px;
}

ul.blog-posts li a:visited {
    color: var(--visited-color);
}

.tags {
    font-size: smaller;
}

.container {
    max-width: 45rem;
    padding-left: 1rem;
    padding-right: 1rem;
    margin-left: auto;
    margin-right: auto;
}

.posts {
    padding: 1.5rem 1rem 0.5rem 1rem;
    border-radius: 10px;
    margin-bottom: 2rem;
    margin-left: -0.5rem;
    margin-right: -0.5rem;
}

.posts.subscribe {
    border: 2px solid #aaa;
}

.posts.handbook {
    border: 2px solid #66f;
}

.posts.machine-learning {
    border: 2px solid #f66;
}

.posts.robot {
    border: 2px solid #fc0;
}

.posts.coding {
    border: 2px solid #556b2f;
}

.post-category {
    margin-right: 0.5rem;
    text-transform: uppercase;
    font-size: 0.8rem;
    text-align: right;
}

.post-category.handbook {
    color: #55d;
}

.post-category.machine-learning {
    color: #f33;
}

.post-category.robot {
    color: #990;
}

.post-category.coding {
    color: #556b2f;
}

.posts hr {
    margin: 2rem 0;
}

.post-summary {
    margin-bottom: 1rem;
}

.post-summary p {
    display: inline;
}

.read-more {
    margin-left: 5px;
}

#toc-aside {
    display: none;
}

#toc-inline summary {
    margin-bottom: 0.2rem;
}

aside#all-posts-link {
    font-size: 90%;
    margin-top: 0.5rem;
}

@media (min-width: 80rem) {
    #toc-inline {
        display: none;
    }

    #toc-aside {
        display: block;
        width: 12rem;
        position: sticky;
        float: left;
        top: 3.5rem;
        margin-top: -4rem;
        margin-left: -15rem;
        font-size: 90%;
        line-height: 1.2;
        overflow-y: auto;
        max-height: calc(100vh - 3.5rem);
    }

    #toc-aside li > a,
    #toc-aside h2 {
        opacity: 0.5;
        transition: opacity 0.5s;
    }

    #toc-aside:hover li > a,
    #toc-aside:hover h2 {
        opacity: 1;
    }

    #toc-aside li.active > a {
        font-weight: bold;
    }

    #toc-aside h2 {
        font-size: 110%;
        margin-bottom: 0.2rem;
    }

    #toc-aside ol {
        margin: 0 0 0.2rem 0;
        padding: 0 0 0 1rem;
        list-style: none;
    }

    #toc-aside ol li a:before {
        content: "";
        border-color: transparent #008eef;
        border-style: solid;
        border-width: 0.35em 0 0.35em 0.45em;
        display: block;
        height: 0;
        width: 0;
        left: -1em;
        top: 0.9em;
        position: relative;
    }

    #toc-aside.coarse li ol {
        display: none;
    }

    aside.page-aside-right {
        position: absolute;
        min-width: 11rem;
        max-width: 17rem;
        top: 4rem;
        margin-left: 45rem;
        margin-right: 2rem;
        font-size: 90%;
    }

    aside.page-aside-right .block {
        margin-bottom: 1.5rem;
    }

    aside.page-aside-right h2 {
        font-size: 110%;
        margin-bottom: 0.2rem;
    }

    aside.page-aside-right ul {
        margin: 0 0 0.2rem 0;
        padding: 0 0 0 1rem;
    }

    aside.page-aside-right ul li {
        margin-top: 0.5rem;
    }

    #language-selector li {
        margin-top: 0;
    }

    aside#all-posts-link {
        position: fixed;
        top: 1.25rem;
        margin-top: 0;
        margin-left: -15rem;
    }
}

aside.page-aside-right time {
    color: #9a9a9a;
}

/* Asides */
aside.post_aside {
    font-style: italic;
    padding: 0rem 1rem 0rem;
    margin: 0.8rem 0;
    border-left: 0.1rem solid #e5e5e5;
    border-right: 0.1rem solid #e5e5e5;
}

details summary {
    cursor: pointer;
}

details summary h3,
details summary h4,
details summary h5,
details summary h6 {
    display: inline;
}

.gh-repo-box {
    border: 1px solid #d1d5da;
    border-radius: 3px;
    padding: 16px;
    margin-top: 0.5rem;
    color: #586069;
    font-size: 80%;
}

.gh-repo-box .repo-link {
    color: #0366d6;
    font-weight: 600;
    font-size: 120%;
}

.gh-repo-box .subtitle {
    margin-bottom: 16px;
}

.gh-repo-box .stars-forks {
    margin-bottom: 0;
}

.gh-repo-box .stars-forks a {
    color: #586069;
}

.gh-repo-box .stars-forks a:hover {
    color: #0366d6;
    text-decoration: none;
}

.gh-repo-box .stars-forks svg {
    vertical-align: text-bottom;
    fill: currentColor;
}

.gh-repo-box .stars {
    display: inline-block;
}

.gh-repo-box .forks {
    display: inline-block;
    margin-left: 16px;
}

.gh-repo-box .sponsor {
    display: inline-block;
    margin-left: 16px;
}

.hidden {
    display: none;
}

.toc-comments-link {
    margin-top: 0.5rem;
}

h5 {
    font-style: italic;
    font-size: 0.9rem;
}
.gray {
    color: gray;
}

a strong {
    color: #268bd2;
}

.right-to-left {
    direction: rtl;
    font-family: Vazir;
}

.left-to-right,
.right-to-left pre,
.right-to-left table,
.right-to-left[id="toc-aside"] {
    direction: ltr;
}

.status-update-list li {
    margin-bottom: 0.5rem;
}

.giscus {
    margin-top: 1.5rem;
}

.frontpage-section {
    margin-bottom: 1rem;
}

hr {
    position: relative;
    margin: 0.5rem 0;
    border: 0;
    border-top: 1px solid var(--hr-color-top);
    border-bottom: 1px solid var(--hr-color-bottom);
}

/* Blog post or page title */
.page-title,
.post-title a {
    color: var(--post-title-color);
}
.page-title,
.post-title {
    margin-top: 0;
}

/* Meta data line below post title */
.post-date {
    display: block;
    margin-top: -0.5rem;
    margin-bottom: 1rem;
    color: #9a9a9a;
    font-size: 80%;
}