/* bobatheme is available under the MIT license at
 * https://github.com/BBaoVanC/bobatheme.
 *
 * vim: foldmethod=marker
 */

/* Color palette {{{ */

:root {
  --background-0: #111111;  /* lch(5, 0, X) */
  --background-1: #212121;  /* lch(12.5, 0, X) */
  --background-2: #303030;  /* lch(20, 0, X) */
  --background-3: #414141;  /* lch(27.5, 0, X) */

  --background-pink-1:      #331821;  /* lch(12.5, 15, 0) */
  --background-red-1:       #331917;  /* lch(12.5, 15, 30) */
  --background-orange-1:    #2e1c0e;  /* lch(12.5, 15, 60) */
  --background-yellow-1:    #262008;  /* lch(12.5, 15, 90) */
  --background-lime-1:      #1b230c;  /* lch(12.5, 15, 120) */
  --background-green-1:     #0e2516;  /* lch(12.5, 15, 150) */
  --background-turquoise-1: #012620;  /* lch(12.5, 15, 180) */
  --background-teal-1:      #00262b;  /* lch(12.5, 15, 210) -- out of sRGB */
  --background-cerulean-1:  #032432;  /* lch(12.5, 15, 240) */
  --background-blue-1:      #152135;  /* lch(12.5, 15, 270) */
  --background-purple-1:    #241d33;  /* lch(12.5, 15, 300) */
  --background-magenta-1:   #2e1a2b;  /* lch(12.5, 15, 330) */

  --background-pink-2:      #4b2431;  /* lch(20, 20, 0) */
  --background-red-2:       #4a2623;  /* lch(20, 20, 30) */
  --background-orange-2:    #432a17;  /* lch(20, 20, 60) */
  --background-yellow-2:    #373012;  /* lch(20, 20, 90) */
  --background-lime-2:      #283416;  /* lch(20, 20, 120) */
  --background-green-2:     #163721;  /* lch(20, 20, 150) */
  --background-turquoise-2: #003830;  /* lch(20, 20, 180) -- out of sRGB */
  --background-teal-2:      #00373e;  /* lch(20, 20, 210) -- out of sRGB */
  --background-cerulean-2:  #013549;  /* lch(20, 20, 240) */
  --background-blue-2:      #1f314e;  /* lch(20, 20, 270) */
  --background-purple-2:    #352c4a;  /* lch(20, 20, 300) */
  --background-magenta-2:   #43263f;  /* lch(20, 20, 330) */

  --background-accent-1: var(--background-blue-1);
  --background-accent-2: var(--background-blue-2);

  --text-0: #d4d4d4;  /* lch(85, 0, X) */
  --text-1: #d4d4d4;  /* lch(85, 0, X) */
  --text-2: #d4d4d4;  /* lch(85, 0, X) */
  --text-3: #e9e9e9;  /* lch(92.5, 0, X) */

  --text-gray-0: #ababab; /* lch(70, 0, X) */
  --text-gray-1: #919191; /* lch(60, 0, X) */

  --link-0: #3a94fb; /* lch(60, 60, 270) */
  --link-1: #4ea1ff; /* lch(65, 60, 270) -- out of sRGB */

  --figure-border: #1f5593; /* lch(35, 40, 270) */

  --pagination-active-hover-text: black;
  --pagination-active-background: #1a3d69; /* lch(25, 30, 270) */
  --pagination-active-hover-background: #2061a8; /* lch(40, 45, 270) */
}

@media print, (prefers-color-scheme: light) {
  :root {
    --background-0: #f1f1f1;  /* lch(95, 0, X) */
    --background-1: #dbdbdb;  /* lch(87.5, 0, X) */
    --background-2: #c6c6c6;  /* lch(80, 0, X) */
    --background-3: #b2b2b2;  /* lch(72.5, 0, X) */

    --background-pink-1:      #f7d1dc;  /* lch(87.5, 15, 0) */
    --background-red-1:       #f8d2ce;  /* lch(87.5, 15, 30) */
    --background-orange-1:    #f1d6c3;  /* lch(87.5, 15, 60) */
    --background-yellow-1:    #e4dbbf;  /* lch(87.5, 15, 90) */
    --background-lime-1:      #d5dfc2;  /* lch(87.5, 15, 120) */
    --background-green-1:     #c6e3cc;  /* lch(87.5, 15, 150) */
    --background-turquoise-1: #bce4db;  /* lch(87.5, 15, 180) */
    --background-teal-1:      #bae3e9;  /* lch(87.5, 15, 210) */
    --background-cerulean-1:  #c2e0f4;  /* lch(87.5, 15, 240) */
    --background-blue-1:      #d0dcf8;  /* lch(87.5, 15, 270) */
    --background-purple-1:    #e1d7f4;  /* lch(87.5, 15, 300) */
    --background-magenta-1:   #efd3ea;  /* lch(87.5, 15, 330) */

    --background-pink-2:      #fbb1c8;  /* lch(80, 30, 0) */
    --background-red-2:       #fbb4ac;  /* lch(80, 30, 30) */
    --background-orange-2:    #eebc97;  /* lch(80, 30, 60) */
    --background-yellow-2:    #d6c58e;  /* lch(80, 30, 90) */
    --background-lime-2:      #b8ce95;  /* lch(80, 30, 120) */
    --background-green-2:     #9ad4a9;  /* lch(80, 30, 150) */
    --background-turquoise-2: #81d6c5;  /* lch(80, 30, 180) */
    --background-teal-2:      #7ad5e1;  /* lch(80, 30, 210) */
    --background-cerulean-2:  #8cd0f6;  /* lch(80, 30, 240) */
    --background-blue-2:      #adc8fe;  /* lch(80, 30, 270) */
    --background-purple-2:    #d0bef7;  /* lch(80, 30, 300) */
    --background-magenta-2:   #ecb5e3;  /* lch(80, 30, 330) */

    --background-accent-1: var(--background-blue-1);
    --background-accent-2: var(--background-blue-2);

    --text-0: #262626;  /* lch(15, 0, X) */
    --text-1: #262626;  /* lch(15, 0, X) */
    --text-2: #262626;  /* lch(15, 0, X) */
    --text-3: #171717;  /* lch(72.5, 0, X) */

    --text-gray-0: #474747; /* lch(30, 0, X) */
    --text-gray-1: #5e5e5e; /* lch(40, 0, X) */

    --link-0: #2061a8; /* lch(40, 45, 270) */
    --link-1: #044e8e; /* lch(32, 42, 270 */

    --figure-border: #367acd; /* lch(50, 50, 270) */

    --pagination-active-hover-text: white;
    --pagination-active-background: #9fbaf0; /* lch(75, 30, 270) */
    --pagination-active-hover-background: #6193e0; /* lch(60, 45, 270) */
  }
}

@media print {
  :root {
    --background-0: #fff;
    --text-0: #000;
  }
}

/* }}} */

/* Fonts {{{ */

@font-face {
  font-family: "Open Sans";
  font-display: swap;
  font-style: normal;
  src: url("../font/opensans/OpenSans-VariableFont_wdth,wght-9f637b868d10819aa0085e6cf7f70953411c8905c4055c069adbe8acc708feef.woff2") format("woff2");
}
@font-face {
  font-family: JetBrainsMono;
  font-display: swap;
  src: url("../font/jetbrainsmono/JetBrainsMono_wght-e190ee6595a3b9bd25278613a6f5d3766ee1a708f300ed44fa63dbe84051498f.woff2") format("woff2");
}

:root {
  --font-sans: "Open Sans", "Noto Sans", sans-serif;
  --font-mono: JetBrainsMono, monospace;
}

html {
  font-family: var(--font-sans);
  /* otherwise code block lines have random text sizes on mobile safari */
  -webkit-text-size-adjust: none;
}
pre, code, kbd, samp, textarea {
  font-family: var(--font-mono);
  font-size: 0.75em;
}
pre > code {
  /* otherwise it ends up being 0.75^2 em */
  font-size: unset;
}

/* }}} */

/* Basic elements {{{ */

html {
  scroll-behavior: smooth;
}

@media screen and (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }
}

body {
  background-color: var(--background-0);
  color: var(--text-0);
  overflow-wrap: break-word;
  margin: 0;
}

.main-container {
  margin: 20px auto;
  padding: 0 20px;
  max-width: 760px; /* 720px + 20px for left & right padding */
}

footer {
  margin: 20px 0;
  text-align: center;
  font-size: smaller;
}

footer p {
  margin: 0;
}

img,
video {
  max-width: 100%;
}

.post-media > figure.border img,
.post-media > figure.border video {
  padding: 5px;
  border: 7px solid var(--figure-border);
}

figure.border img,
figure.border video {
  padding: 5px;
  border: 2px solid var(--figure-border);
}

figure {
  margin: auto;
  display: inline-block;
}

figcaption {
  font-style: italic;
  font-size: small;
  text-align: center;
}

a {
  color: var(--link-0);
  text-decoration: inherit;
}

a:hover {
  text-decoration: underline;
}

blockquote {
  border-left: 5px solid var(--background-2);
  padding-left: 15px;
  margin-left: 0;
}

hr {
  border: 1px solid var(--background-3);
}

@media (min-width: 720px) {
  .full-width-hr {
    /* see also: the related-posts section too */
    margin-left: calc(-100vw / 2 + 760px / 2);
    margin-right: calc(-100vw / 2 + 760px / 2);
  }
}

table.markdown {
  border-collapse: collapse;
  border: 2px solid var(--text-1);
}

table.markdown thead {
  background-color: var(--background-2);
  color: var(--text-2);
  border-bottom: 2px solid var(--text-1);
}

table.markdown th,
table.markdown td {
  padding: 8px;
}

table.markdown :is(th, td) + :is(th, td) {
  border-left: 2px solid var(--text-1);
}

table.markdown tbody tr:nth-child(odd) {
  background-color: var(--background-0);
  color: var(--text-0);
}
table.markdown tbody tr:nth-child(even) {
  background-color: var(--background-1);
  color: var(--text-1);
}

:target {
  animation: target-fade 10s ease-out;
}
@keyframes target-fade {
    0% { background-color: var(--background-yellow-2); }
}

* {
  box-sizing: border-box;
}


/* Icons */
.icon {
  width: 20px;
  height: 20px;
  color: var(--text-1);
  text-align: center;
  display: inline;
  vertical-align: middle;
}

h1 svg.icon {
  width: 30px;
  height: 30px;
}

/* }}} */


/* Heading formatting (article section titles) {{{ */

/* this is also used i.e. in page-title */
.heading-link {
  color: inherit;
  font-weight: bold;
}

.heading-link svg {
  width: 15px;
  height: 15px;
}

/* }}} */

/* Top bar formatting {{{ */

.top {
  display: flex;
  flex-direction: row;
  flex-wrap: wrap;
  justify-content: space-between;
  background-color: var(--background-1);
}

.header {
  flex-grow: 1;
  margin: 8px 16px;
  font-size: 1.25em;
  display: flex;
  align-items: center;
}

.navbar {
  display: flex;
  flex-wrap: wrap;
}

.navbar-item {
  padding: 12px 16px;
  white-space: nowrap;
}

.navbar-item:hover {
  background-color: var(--background-2);
  text-decoration: none;
}

.navbar-item.active {
  font-weight: bold;
}

/* }}} */

/* Back to top {{{ */
#top {
  font-size: 0;
}
#back-to-top {
  position: fixed;
  float: right;
  bottom: 25px;
  right: 25px;
  background-color: var(--background-1);
  color: var(--text-1);
  border-radius: 100%;
  padding: 12px;
  display: none;
}
/* }}} */

/* Skip to main content {{{ */
#skip-to-main {
  position: absolute;
  padding: 8px;
  background-color: var(--text-0);
  color: var(--background-0);
  transform: translateY(-100%);
}
#skip-to-main:focus {
  transform: translateY(0%);
}
#main-content:target {
  animation: none; /* prevent it from turning yellow */
}
/* }}} */

/* Breadcrumb navigation {{{ */

.breadcrumb {
  margin: 20px 0;
}

.breadcrumb ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

.breadcrumb li {
  display: inline;
}

.breadcrumb li+li:before {
  content: "»"
}

/* }}} */


/* Pagination {{{ */

.pagination {
  list-style: none;
  text-align: center;
  padding: 0;
}

.pagination .page-item {
  display: inline;
}

.pagination .page-link {
  padding: 8px 16px;
  border-radius: 5px;
  color: var(--text-1);
}

.pagination .page-item.active .page-link {
  background-color: var(--pagination-active-background);
  color: inherit;
}

.pagination .page-item.active .page-link:hover {
  background-color: var(--pagination-active-hover-background);
  color: var(--pagination-active-hover-text);
  cursor: default;
}

.pagination .page-link:hover {
  text-decoration: none;
}

.pagination :not(li.disabled) > .page-link:hover {
  background-color: var(--background-3);
}

.pagination li.disabled {
  opacity: .5;
}

.pagination li.disabled > .page-link:hover {
  cursor: not-allowed;
}

/* }}} */

/* List layout {{{ */

/* flexbox container for sections and main page list */
.list-page-container {
  display: flex;
  flex-direction: column;
  gap: 40px;
}

.page-list {
  display: flex;
  flex-direction: column;
  list-style: none;
  padding: 0;
  gap: 40px;
  margin-top: 16px;
}

.page-list > .page {
  padding: 24px;
  border-radius: 12px;
  background-color: var(--background-1);
  color: var(--text-1);
}

.page > .page-title {
  margin-top: 0;
}

/* hugo just can't handle this feature
.post-series-position {
  position: relative;
  float: right;
  opacity: .75;
}
*/

.page-title {
  margin-bottom: 10px;
}

.page-title h1 {
  margin: 0;
}

.page-metadata {
  margin-bottom: 24px;
}

.page-metadata-item {
  margin-right: 10px;
  display: inline-block;
}

.page-metadata-section {
  margin-top: 10px;
}

.post-media {
  margin-top: 15px;
}

.page-description {
  margin-top: 10px;
}

.readmore {
  margin-top: 5px;
}

/* }}} */

/* Taxonomy list layout {{{ */

.taxonomy-list a,
.taxonomy-list .taxonomy-metadata {
  white-space: nowrap;
}

.taxonomy-list p {
  margin: 0;
}

.taxonomy-list {
  list-style: none;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.taxonomy-list .taxonomy-term {
  background-color: var(--background-1);
  color: var(--text-1);
  padding: 8px 12px;
  border-radius: 8px;
  display: flex;
  flex-direction: row;
  gap: 20px;
}

.taxonomy-list-left {
  display: flex;
  flex-direction: column;
}

@media (max-width: 480px) {
  .taxonomy-list .taxonomy-term {
    flex-direction: column;
    gap: 4px;
  }

  .taxonomy-list-left {
    flex-direction: row;
    justify-content: space-between;
  }
}

/* }}} */

/* Series list layout {{{ */

.page-list.series {
  display: flex;
  gap: 80px;
  flex-flow: row wrap;
  list-style: none;
  color: var(--text-0);
  padding: 8px;
  border-radius: 16px;
}

.page-list.series-inner {
  gap: 10px;
  flex-direction: row;
  flex-flow: row wrap;
  background-color: var(--background-0);
  /*color: var(--text-0);*/
  padding: 8px;
  border-radius: 16px;
}
.page-list.series-inner > .page {
  flex: 1;
  min-width: 49%;
}

/* }}} */

/* Subsections on list pages {{{ */

.sections {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.section {
  background-color: var(--background-1);
  color: var(--text-1);
  border-radius: 12px;
  padding: 1px 25px;
}

.section:hover {
  background-color: var(--background-2);
  color: var(--text-2);
}

.section-title {
  margin: 10px 0;
}

.section-anchor {
  color: inherit;
}

.section-anchor:hover {
  text-decoration: none;
}

.section-description {
  margin-bottom: 5px;
}

.view-section {
  margin-top: 5px;
}

/* }}} */


/* Content (single) formatting {{{ */

.series-box {
  background-color: var(--background-1);
  color: var(--text-1);
  padding: 8px 16px;
  border-radius: 8px;
  margin: 15px 0;
}

.table-of-contents {
  background-color: var(--background-1);
  color: var(--text-1);
  padding: 8px 20px;
  border-radius: 8px;
  margin: 10px 0;
}

.table-of-contents summary {
  cursor: pointer;
}

.table-of-contents.print {
  display: none;
  padding: 8px 15px;
}

/* Social media share buttons */

.share-buttons {
  background: var(--background-1);
  color: var(--text-1);
  margin: 25px 0;
  padding: 8px 0;
  border-radius: 8px;
  display: flex;
  gap: 8px;
  justify-content: center;
}

.share-buttons a {
  background-color: var(--background-2);
  color: var(--text-2);
  padding: 4px;
  border-radius: 8px;
}
.share-buttons a:hover {
  background-color: var(--background-3);
  color: var(--text-3);
}

.share-buttons svg {
  width: 32px;
  height: 32px;
}

/* https://stackoverflow.com/a/72073682/19003757 */
/*
.telegram-share > svg {
  transform: scale(1.5);
  margin: 9px -9px -9px 9px;
}
*/

/* See also formating */
.see-also {
  background-color: var(--background-1);
  color: var(--text-1);
  padding: 8px 12px;
  border-radius: 8px;
  margin: 10px 0;
}

.see-also p {
  margin: 0;
}

/* Previous and next page buttons {{{ */

.prevnext {
  display: flex;
  margin: 20px 0;
}

.prevnext > * {
  flex: 1;
  white-space: nowrap;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  color: inherit;
  background-color: var(--background-1);
  color: var(--text-1);
  padding: 8px 16px;
}

.prevnext > a:hover {
  background-color: var(--background-2);
  color: var(--text-2);
  text-decoration: none;
}

.prevnext > .prev {
  text-align: left;
  border-top-left-radius: 8px;
  border-bottom-left-radius: 8px;
}

.prevnext > .next {
  text-align: right;
  border-top-right-radius: 8px;
  border-bottom-right-radius: 8px;
}

.prevnext .prev-caption,
.prevnext .next-caption {
  opacity: 65%;
}

.prevnext .prev-post,
.prevnext .next-post {
  overflow: hidden;
  text-overflow: ellipsis;
}

/* }}} */

/* Code & code blocks {{{ */
.code-block {
  display: flex;
  flex-direction: column;
  margin: 16px 0;
  background-color: var(--background-1);
  border-radius: 8px;
}
.code-block > .code-header {
  display: flex;
  flex-direction: row;
  justify-content: space-between;
  background-color: var(--background-2);
  padding: 4px 8px;
  border-top-left-radius: 8px;
  border-top-right-radius: 8px;
}
.code-block > .code-header > .code-type {
  border-top-left-radius: 8px;
  margin: auto 0;
}
/* TODO: make the code copy button prettier */
.code-block > .code-header > .code-copy-button {
  color: var(--link-1);
}
.code-block > .code-header > .code-copy-button:hover {
  cursor: pointer;
}
.code-block > .highlight {
  margin: 8px 4px;
}

.highlight > .chroma {
  overflow: auto;
}
.chroma {
  /* the syntax highlight CSS adds a border */
  background-color: transparent !important;
  margin: 0;
}

.chroma .gp {
  /* Generic Prompt symbol */
  user-select: none;
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
}

:not(pre) > code {
  background-color: var(--background-2);
  /* Disable this because it overrides inline code blocks that are
   * also links
  color: var(--text-2);
   */
  padding: 2px 4px;
  overflow-wrap: break-word;
}

.code-block > .code-header > .code-type,
code {
  border-radius: 5px;
}

.chroma .lnt {
  display: block;
} /* fixes line numbers on firefox when there's only one line */

/* }}} */

/* Asides {{{ */

aside {
  padding: 8px 16px;
  margin: 16px 0;
  border-radius: 8px;
  color: var(--text-1);
}

.aside-title {
  margin-bottom: 8px;
  padding-bottom: 4px;
  font-weight: bold;
}

.aside-content > :first-child {
  margin-top: 0;
}
.aside-content > :last-child {
  margin-bottom: 0;
}

aside.note {
  background-color: var(--background-blue-1);
}
aside.info {
  background-color: var(--background-green-1);
}
aside.tip {
  background-color: var(--background-teal-1);
}
aside.warning {
  background-color: var(--background-yellow-1);
}
aside.example {
  background-color: var(--background-purple-1);
}
aside.quote {
  background-color: var(--background-1);
}

/* }}} */

/* }}} */

/* Related posts section {{{ */

.full-width-page-list {
  /* make left/right 0 margin so it takes up full width */
  margin: 25px 0;
}

.related-posts > hr,
.related-posts > h1 {
  margin-left: 20px;
  margin-right: 20px;
}

.related-posts .page {
  min-width: 300px;
  max-width: 300px;

}

.related-posts .page:first-child {
  margin-left: 20px;
}
.related-posts .page:last-child {
  margin-right: 20px;
}

.related-posts .page-list {
  display: flex;
  flex-direction: row;
  gap: 20px;
  overflow-x: scroll;
}

/* }}} */


/* @media specializations {{{ */

/* Light mode */
@media print,
(prefers-color-scheme: light) {
  li.disabled {
    opacity: .25;
  }
}

/* Print compatibility {{{ */
@media print {
  .top > .navbar,
  .section-header-link,
  .post-meta-edit-history,
  .prevnext,
  .share-buttons,
  .related-posts {
    display: none;
  }

  * {
    -webkit-print-color-adjust: exact !important;
    color-adjust: exact !important;
  }

  .top {
    background-color: unset;
  }
  .top > .header {
    margin-left: 0;
    margin-right: 0;
  }
  .main-container {
    max-width: 100%;
    margin: 8px 0;
    padding: 0;
  }

  .breadcrumb {
    margin: 8px 0;
  }

  table,
  aside,
  .code-block {
    break-inside: avoid;
  }

  .table-of-contents {
    display: none;
  }

  .table-of-contents.print {
    display: block;
  }

  #back-to-top {
    display: none !important;
  }
}

/* }}} */

/* }}} */