style.css

/*

Symbol font

*/

@import url("https://fonts.googleapis.com/css2?family=Noto+Sans+Symbols+2&display=swap");
@import url("https://cdnjs.cloudflare.com/ajax/libs/normalize/8.0.1/normalize.min.css");
@import url("https://unpkg.com/sakura.css/css/sakura.css");

/*

Global

*/
html,
body {
  scroll-behavior: smooth;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  text-decoration-line: underline;
  text-decoration-style: solid;
  text-decoration-color: #93ce5799;
  text-decoration-thickness: 30%;
  text-decoration-skip-ink: none;
}
h1 {
  line-height: 1.5;
}
h2 {
  line-height: 1.4;
  text-decoration-style: solid;
  text-decoration-thickness: 20%;
}
h3 {
  text-decoration-style: dashed;
  text-decoration-thickness: 15%;
}
h4 {
  text-decoration-style: dashed;
  text-decoration-thickness: 10%;
}
h5 {
  text-decoration-style: dotted;
  text-decoration-thickness: 10%;
}
h6 {
  text-decoration-style: dotted;
  text-decoration-thickness: 7%;
}

p {
  text-align: left;
}

img.feed {
  width: 24px;
  height: 24px;
  margin-top: unset;
  margin-bottom: unset;
}

.inline > p {
  display: inline;
  margin-top: unset;
  margin-bottom: unset;
}

p img,
header img,
footer img {
  margin-bottom: unset;
}

figure > img.article-header-image {
  margin: auto;
  display: block;
}

a[target="_blank"]:not(.link-preview):not(.has-image)::after {
  content: "🗗";
  font-family: "Noto Sans Symbols 2", sans-serif;
  margin-left: 2px;
  margin-right: 1px;
  width: 1em;
  height: 1em;
}

a.has-image {
  display: contents;
}

a.has-image:hover {
  border-bottom: unset;
}

*:target {
  /* Yellow-ish highlight background on target text */
  background-color: #fff9d7 !important;
}

.link-ish {
  /* Imitate Sakura.css's link text style */
  color: #1d7484;
}
a:visited > .link-ish {
  color: #144f5a;
}
.link-ish:hover {
  color: #982c61 !important;
}

/* Navigation for site metadata such as build status badge and author follow link.
No excess margins, slightly gapped, centered horizontally
*/
nav.meta {
  display: flex;
  align-items: center;
  gap: 5px;
}
nav.meta > a {
  display: contents;
}

nav.scroll-buttons {
  position: fixed;
  display: flex;
  flex-direction: column;
  gap: 5px;
  right: 10px;
  bottom: 10px;
}

nav.prev-next-navigation {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin: 10px 0 15px;
  height: 1.5em;
}

/* Lightbox image popup */
body:has(.lightbox) {
  overflow: hidden;
}
.lightbox {
  position: fixed;
  z-index: 10;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: #000000b0;
  display: flex;
  justify-content: center;
  align-items: center;
  overflow: hidden;
}
.lightbox::after {
  content: "✕";
  font-family: "Noto Sans Symbols 2", sans-serif;
  position: absolute;
  display: block;
  top: 0;
  right: 0;
  width: 50px;
  height: 50px;
  font-size: 50px;
  line-height: 50px;
  color: #909090;
  cursor: pointer;
}
.lightbox a {
  display: contents;
}
.lightbox img {
  max-width: 100%;
  max-height: 100%;
  margin: auto;
}

/*

Show All/Less Container

*/

input[type="checkbox"].showless-toggle {
  display: none;
}

input[type="checkbox"].showless-toggle + * {
  transition: all 0.3s ease-out;
  max-height: 250px;
  margin-bottom: 0;
  padding-bottom: 50px;
  overflow: hidden;
}

input[type="checkbox"].showless-toggle:checked + * {
  /* This value have to be manually adjusted */
  max-height: 2000px;
}

label.showless-button {
  position: relative;
  display: block;
  margin: -50px 0 0;
  height: 50px;
  width: 100%;
  text-align: center;
  cursor: pointer;
  /* body background color from sakura.css */
  background: linear-gradient(
    to bottom,
    #f9f9f900,
    #f9f9f980 10%,
    #f9f9f9ff 30%,
    #f9f9f9ff
  );
}

input[type="checkbox"].showless-toggle ~ label.showless-button::before {
  content: "🔽 Show More";
  line-height: 50px;
}

input[type="checkbox"].showless-toggle:checked ~ label.showless-button::before {
  content: "🔼 Show Less";
}

/*

Link Preview

*/

.link-preview blockquote:hover {
  border-color: #4a4a4a;
}

.link-preview table {
  margin-bottom: 0;
}

.link-preview table tr td:first-child {
  width: 75%;
  max-width: 75%;
  overflow: hidden;
  text-overflow: ellipsis;
  word-break: break-all;
}

.link-preview table tr td:last-child {
  width: 25%;
  max-width: 25%;
  min-width: 25%;
  vertical-align: top;
}

.link-preview table tr td strong {
  display: -webkit-box;
  width: 100%;
  -webkit-box-orient: vertical;
  line-clamp: 2;
  -webkit-line-clamp: 2;
  overflow: hidden;
  text-align: left;
}

.link-preview table tr td strong img {
  width: 1em;
  height: 1em;
  margin-bottom: 0;
  margin-right: 0.4em;
}

.link-preview table tr td > p,
.link-preview table tr td > div {
  font-size: 75%;
}

.link-preview blockquote:hover table tr td > small {
  border-bottom: 2px solid #4a4a4a;
}

/*

Twilogs

Tweet-like style on top of Sakura.css

*/

.twilogs-day-header {
  /* Sticky daily section header */
  position: sticky;
  z-index: 1;
  top: 0;
  padding: 10px;
  background: #f9f9f9;
}

.tweet {
  position: relative;
  font-size: 0.75em;
  background: #f9f9f9;
  border: 1px solid #eaeaea;
  border-radius: 5px;
  padding: 10px;
  margin: 10px 0;
}
.tweet:first-child {
  margin-top: 0;
}

/* raw twilog-data viewer */
.tweet > a[class="permalink"] {
  position: absolute;
  right: 2em;
  top: 0.5em;
  color: lightgrey;
}
.tweet > a[class="permalink"]:hover {
  border: none;
  text-decoration: none;
}
.tweet > a[class="permalink"]::before {
  content: "↵";
  font-family: "Noto Sans Symbols 2", sans-serif;
}
.tweet > input[type="checkbox"] {
  position: absolute;
  right: 0.5em;
  top: 0.5em;
  cursor: pointer;
  opacity: 0.1;
  outline: none !important;
}
.tweet > input[type="checkbox"]:checked {
  opacity: 0.8;
}
.tweet > input[type="checkbox"] ~ .twilog-data {
  display: none;
  white-space: pre-wrap;
  font-family: "Cica", Courier, "Courier New", monospace;
}
.tweet > input[type="checkbox"] ~ label {
  display: none;
}
.tweet > input[type="checkbox"]:checked ~ .twilog-data {
  display: block;
}
.tweet > input[type="checkbox"]:checked ~ label {
  display: block;
  cursor: pointer;
}
.tweet > input[type="checkbox"]:checked ~ :not(.twilog-data):not(label) {
  display: none;
}

.thread {
  position: relative;
  margin: 10px 0;
}

.reply {
  position: relative;
  padding-left: 1.1em;
}

/* In thread, tweets are rendered without gap, and only first and last children get rounded corners */
.reply::before {
  content: "↳";
  font-family: "Noto Sans Symbols 2", sans-serif;
  display: block;
  position: absolute;
  top: 0.5em;
  left: 0;
  width: 1em;
  height: 1em;
  color: #999;
}

/* tweets or retweets' headers */
.tweet header {
  display: flex;
  align-items: center;
}
.tweet header a {
  display: contents;
}

/* tweets or retweets' avatars, rounded squared */
.tweet header img:first-child {
  width: 1.3em;
  height: 1.3em;
  border-radius: 5px;
  margin-right: 5px;
}

/* retweets' special textual label above their contents */
.tweet > .retweet-label,
.tweet > .reply-label {
  font-size: 0.7em;
  color: #999;
  margin-bottom: 5px;
}

/* retweet icon using noto sans symbol font */
.tweet > .retweet-label::before {
  content: "🔁";
  font-family: "Noto Sans Symbols 2", sans-serif;
  margin-right: 5px;
}

/* tweets or retweets' text body */
.tweet .body {
  white-space: pre-wrap;
  margin: 0;
  padding: 0;
}

/* paragraphs in tweets or retweets' text body */
.tweet .body p {
  margin: 0;
  padding: 0;
  word-break: break-all;
}

/* blockquote inside tweets or retweets' text body; loosely resembles Sakura's default blockquote style but deemphasized. slightly gapped */
.tweet .body blockquote {
  color: #4a4a4a;
  border-left: 3px solid #eaeaea;
  margin: 5px 0;
  padding: 5px 10px;
  font-size: 0.9em;
}

/* code block inside tweets or retweets' text body; */
.tweet .body pre {
  border: 1px solid #eaeaea;
  border-radius: 5px;
  margin: 5px 0;
  padding: 5px 10px;
}

/* list container inside tweets or retweets' text body; only slightly gapped */
.tweet .body ul,
.tweet .body ol {
  margin: 5px 0;
}

/* list items inside tweets or retweets' text body; gap canceled */
.tweet .body li {
  margin: 0;
  padding: 0;
}

/* tweets or retweets' timestamp */
.tweet time {
  font-size: 0.8em;
  color: #999;
  margin-bottom: 5px;
}

/* Cancel all new-tab links styles within .tweet */
.tweet a[target="_blank"]::after {
  content: unset !important;
}

/* Subtle underline on links of status URLs */
.tweet > a:hover {
  border-bottom: 1px solid #4a4a4a;
}

a:has(> .tweet) {
  display: contents;
  color: unset;
}
a:hover > .tweet {
  /* change background color slightly, so that user can recognize links */
  background: #f5f5f5;
}

/* Grid container of media (photo|video|animated_gif), at-most 2x2 grid.
*/
.tweet .media-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  grid-auto-rows: minmax(auto, 150px);
  grid-gap: 2px;
  margin: 5px 0;
  border-radius: 10px;
  overflow: hidden;
  /* subtle box-shadow and background-color */
  box-shadow: 0 0 0 1px #eaeaea;
  background-color: #eaeaea;
}

.tweet .media-grid > *:last-child:nth-child(2n + 1) {
  grid-column-end: span 2;
}
/* Link in .media-grid must not have underline and margins */
.tweet .media-grid a {
  border-bottom: none;
}

/* Images in .media-grid must not have margins */
.tweet .media-grid img {
  margin: 0;
  object-fit: cover;
  height: 100%;
  width: 100%;
}

/* Show video icon overlay using Noto Symbol fonts */
:is(.tweet .media-grid, .lightbox) figure.video-thumbnail {
  position: relative;
  display: flex;
  margin: 0;
  padding: 0;
}
:is(.tweet .media-grid, .lightbox) figure.video-thumbnail::after {
  content: "▶";
  font-family: "Noto Sans Symbols 2", sans-serif;
  position: absolute;
  display: block;
  width: 100%;
  height: 100%;
  font-size: 3em;
  color: #fff;
  background: rgba(0, 0, 0, 0.5);
  padding-top: 0.2em;
  padding-left: 0.4em;
  box-sizing: border-box;
}

.tweet .link-preview {
  display: grid;
  grid-template-columns: auto auto;
  max-height: 150px;
  margin: 5px 0;
  /* Subtle border */
  border: 1px solid #eaeaea;
  border-radius: 10px;
  overflow: hidden;
}
.tweet .media-grid ~ a > .link-preview {
  max-height: 75px;
}
.tweet .link-preview img {
  width: 100%;
  height: 100%;
  max-height: 150px;
  object-fit: cover;
}
.tweet .media-grid ~ a > .link-preview img {
  max-height: 75px;
}
.tweet .link-preview div {
  padding: 5px 10px;
}
.tweet .link-preview div:not(:first-child) {
  border-left: 1px solid #eaeaea;
}
.tweet .link-preview div header {
  margin: 5px 0;
}
.tweet .link-preview div p {
  font-size: 0.8em;
}
.tweet a > .link-preview {
  /* apply Sakura's normal text color */
  color: #4a4a4a;
}
.tweet a:hover > .link-preview {
  /* change background color slightly, so that user can recognize links */
  background: #f5f5f5;
}

/* Twilog archive menu by year-month.

Each year-month makes details container with year-month text in summary,
and a list of available days in the body.
*/
nav.twilog-archive-navigation {
  margin: 1.3em 0;
}

/* 他で使う場合にもtwilog-archive-navigation配下で使っていたスタイルをベースとして援用 */
details {
  margin: 5px 0;
}

details summary {
  font-size: 1.1em;
  font-weight: bold;
  color: #4a4a4a;
  cursor: pointer;
}
details[open] > summary {
  /* Somewhat bright border-bottom, in-line with Sakura's link style */
  border-bottom: 2px solid #4a4a4a;
}

nav.twilog-archive-navigation details details {
  margin-left: 20px;
}

nav.twilog-archive-navigation ul {
  columns: 2 auto;
  margin: 0;
  padding: 5px;
  list-style-position: inside;
  font-size: 0.9em;
}
nav.twilog-archive-navigation ul li {
  margin: 0;
  padding: 0;
}
/* Fancy list marker for twilog archive menu items */
nav.twilog-archive-navigation ul li::marker {
  content: "📅";
  font-family: "Noto Sans Symbols 2", sans-serif;
  color: #999;
  letter-spacing: 5px;
}
nav.twilog-archive-navigation ul li.selected {
  font-weight: bold;
}
nav.twilog-archive-navigation ul li.selected::after {
  content: "◀";
  display: inline;
  width: 1em;
  height: 1em;
}

/* Twilog search container */
.search {
  position: sticky;
  top: 10px;
  text-align: right;
  z-index: 5;
}
.spinner::before {
  position: absolute;
  display: inline-block;
  vertical-align: middle;
  content: "";
  margin-left: 0.2em;
  width: 0.5em;
  height: 0.5em;
  transform: translate(-50%, -50%);
  border: 5px solid #aeaeae;
  border-radius: 50%;
  border-top-color: #1d7484;
  animation: spin 1s linear infinite;
}
@keyframes spin {
  to {
    transform: translate(-50%, -50%) rotate(360deg);
  }
}
.search input[type="search"] {
  width: 15em;
  margin-bottom: 0;
  transition: all 0.3s ease-in-out;
}
.search:focus-within input[type="search"] {
  width: 100%;
}
/* Twilog search results dropdown */
.search .search-results {
  display: none;
}
.search:focus-within .search-results {
  display: block;
  position: absolute;
  left: 0;
  width: 95%;
  max-height: 400px;
  overflow-y: auto;
  box-sizing: border-box;
  padding: 10px;
  background: #fff;
  border: 1px solid #eaeaea;
  border-radius: 5px;
  z-index: 2;
  /* Shadow behind dropdown */
  box-shadow: 5px 5px 5px #eaeaea;
}
.search .search-results button.jump-to-button {
  display: block;
  width: 100%;
  padding: unset;
  margin: unset;
  text-align: left;
  line-height: unset;
  border: none;
  background: none;
  color: unset;
  font-size: unset;
  font-family: unset;
}
.search .search-results .tweet:hover,
.search .search-results .jump-to-button:focus .tweet {
  /* yellow */
  background-color: #fff9c4;
  cursor: pointer;
}
.search .search-results .provider {
  position: relative;
  display: block;
  width: 100%;
  text-align: right;
  /* off color */
  color: #999;
  font-size: 0.8em;
  font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;

  & img {
    display: inline;
    vertical-align: middle;
    height: 1em;
    margin: 0;
  }
}

/* 書架 */
body:has(.locked) {
  max-height: 100vh;
  overflow-y: hidden;
}
.locked {
  filter: blur(5px);
  user-select: none;
  pointer-events: none;
}
.kindle-data {
  font-size: 0.6em;
}
.kindle-data details {
  max-height: 50vh;
  overflow-y: auto;
}
.kindle-data details[open] > summary {
  position: sticky;
  z-index: 1;
  top: 0;
  background-color: #f9f9f9;
}
.kindle-data thead > th {
  color: #fff;
  background-color: #408fdf;

  /* elm-sortable-table */
  &:has(span) {
    cursor: pointer;
  }
}
.kindle-data tbody > tr:nth-child(even) {
  background-color: #eaeaea;
}

.kindle-control {
  font-size: 14px;
}
.kindle-control > select {
  margin-top: 10px;
  font-weight: bold;
}
.kindle-filterable-tag {
  display: inline-block;
  border-radius: 1em;
  margin-left: 0.1em;
  padding: 5px 10px;
  line-height: 1.15;
  text-align: center;
  text-decoration: none;
  white-space: nowrap;
  color: #f9f9f9;
  border-color: #1d7484;
  background-color: #1d7484;
}
button.kindle-filterable-tag:focus {
  border-color: #144f5a;
  background-color: #144f5a;
}
button.kindle-filterable-tag::after {
  display: inline-block;
  content: "＋";
  font-weight: bold;
  margin-left: 0.5em;
  transform: scale(1.2);
  transition: transform 1s ease-in-out;
}
button.kindle-filterable-tag.active {
  color: #fff;
  background-color: #982c61;
  border-color: #982c61;
}
button.kindle-filterable-tag.active:hover {
  background-color: #95225a;
}
button.kindle-filterable-tag.active::after {
  transform: scale(1.2) rotate(45deg);
}

.kindle-bookshelf {
  text-align: center;
  margin: 1em auto 30vh;
}
.kindle-bookshelf .has-image {
  display: inline-block;
}
.kindle-bookshelf-image {
  vertical-align: top;
  width: 55px;
  min-height: 70px;
  margin-bottom: 30px;
  transition: transform 0.2s ease-in-out;
}
.kindle-bookshelf-image:hover {
  transform: scale(1.5);
}
.series-bookmark {
  position: absolute;
  z-index: -1;
  background-color: #1d7484;
  color: #f5f5f5;
  font-size: 8px;
  box-sizing: border-box;
  max-width: 200px;
  padding: 0 0.5em 0 1em;
  overflow-x: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
  transform: translate(-100%, -100%);
  border-top-left-radius: 0.5lh;
  border-bottom-left-radius: 0.5lh;
}
.series-bookmark[data-count="3"] {
  max-width: 150px;
}
.series-bookmark[data-count="2"] {
  max-width: 100px;
}
.series-bookmark[data-count="1"] {
  max-width: 50px;
}
.kindle-bookshelf-navigation {
  text-align: center;
  margin-bottom: 1em;
}
.kindle-bookshelf-navigation > :not(:first-child) {
  margin-left: 0.5em;
}

.kindle-popover {
  display: block;
  visibility: hidden;
  opacity: 0;
  z-index: 7;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  margin: 0 auto;
  max-width: 80vw;
  background-color: #f9f9f9;
  box-shadow: 0 0 10px #999;
  border-top-left-radius: 10px;
  border-top-right-radius: 10px;
  overflow: hidden;
  transition: all 0.2s ease-out;
  transform: translateY(100%);
}
.kindle-popover:not([hidden]) {
  visibility: visible;
  opacity: 1;
  transform: translateY(0);
}
.kindle-popover > header {
  display: flex;
  flex-direction: row-reverse;
  align-items: center;
  padding: 0 0.5em;
  cursor: pointer;
}
.kindle-popover > header::after {
  content: "✕";
  font-family: "Noto Sans Symbols 2", sans-serif;
  display: contents;
}
.kindle-popover > header:hover {
  background-color: #eaeaea;
}
.kindle-popover > main {
  display: flex;
  padding-top: 0.5em;
  padding: 0;
  width: 100%;
  gap: 1em;
}
.kindle-popover > main > :is(.prev-volume, .next-volume) {
  font-family: "Noto Sans Symbols 2", sans-serif;
  width: 40px;
  padding: 60px 3px;
  box-sizing: border-box;
}
.kindle-popover > main > :is(.prev-volume, .next-volume).active:hover {
  background-color: #eaeaea;
  cursor: pointer;
}
.kindle-book-details {
  flex-grow: 1;
  overflow-y: auto;
  max-height: 60vh;
  display: flex;
  flex-direction: row;
  gap: 1em;
}
@media (max-width: 699px) {
  .kindle-popover {
    max-width: 95vw;
  }
  .kindle-popover > main {
    gap: 0.2em;
  }
  .kindle-book-details {
    max-height: 85vh;
    flex-direction: column;
  }
}
.kindle-book-details img {
  width: 150px;
  object-fit: contain;
  align-self: center; /* Small screenでいい感じになる */
}
.kindle-book-details > div {
  flex-grow: 1;
}
.kindle-book-details > div > h5 {
  margin-top: 0;
  word-break: break-all;
}
.kindle-book-details > div > .cloud-reader-link {
  display: inline-block;
  margin-bottom: 1.5rem;
  padding: 0 0.5em;
  line-height: 2em;
  color: #f9f9f9;
  background-color: #408fdf;
  border-radius: 5px;
}
.kindle-book-details > div > .cloud-reader-link:hover {
  border-bottom: initial;
  background-color: #2a84dd;
}
.kindle-book-details > div > .cloud-reader-link::before {
  content: "📚";
  font-family: "Noto Sans Symbols 2", sans-serif;
  margin-right: 0.2em;
}
.kindle-book-details > div > .cloud-reader-link::after {
  content: "";
  display: none;
}
.kindle-book-details > div > .kindle-book-edit-button {
  display: inline-block;
  vertical-align: middle;
  font-family: "Noto Sans Symbols 2", sans-serif;
  margin-left: 10px;
  line-height: 1.5em;
  height: 1.5em;
  width: 1.5em;
  padding: 0;
  border-radius: 2px;
  border-style: solid;
  border-width: 2px;
  background-color: transparent;
  color: #144f5a;
}
.kindle-book-details > div > .kindle-book-edit-button::after {
  content: "🖉";
  font-size: 1.5em;
}
.kindle-popover
  > main
  > article
  > div
  > .kindle-book-edit-button:is(:hover, :focus) {
  color: #982c61;
}
.kindle-popover
  > main
  > article
  > div
  > .kindle-book-edit-button.active::after {
  content: "✔";
}
input[type="text"].kindle-book-edit-input {
  width: 100%;
}
.kindle-book-details > div > ul {
  font-size: 14px;
}
.kindle-library-lock {
  flex-grow: 1;
}
.kindle-library-lock > form {
  margin: 15vh auto;
  width: fit-content;
}
.kindle-library-lock > form::before {
  content: "🔐";
  display: inline-block;
  position: absolute;
  font-size: 4em;
  font-family: "Noto Sans Symbols 2", sans-serif;
  transform: translate(-100%, -50%) rotate(10deg);
}

.kindle-review-editor {
  position: fixed;
  display: flex;
  flex-direction: column;
  padding: 10px;
  gap: 10px;
  left: 0;
  bottom: 0;
  width: 600px;
  max-width: 80vw;
  background-color: #f9f9f9;
  box-shadow: 0 0 10px #999;
  border-top-right-radius: 10px;
  overflow: hidden;

  & > input[type="text"] {
    width: 100%;
    margin: 0;
  }
}

.markdown-editor {
  position: relative;
  font-size: 1.5rem;
  line-height: 1.8;

  & > .background {
    overflow: hidden;
    visibility: hidden;
    box-sizing: border-box;
    padding: 10px;
    margin: 0;
    min-height: 120px;
    max-height: 40vh;
    white-space: pre-wrap;
    word-wrap: break-word;
    overflow-wrap: break-word;
    border: 1px solid;

    @media (max-height: 699px) {
      max-height: 25vh;
    }
  }

  & > textarea {
    position: absolute;
    top: 0;
    left: 0;
    display: block;
    overflow-y: auto;
    box-sizing: border-box;
    padding: 10px;
    margin: 0;
    width: 100%;
    height: 100%;
    font: inherit;
    letter-spacing: inherit;
    resize: none;
  }

  & > textarea:focus {
    box-shadow: 0 0 0 1px #144f5a;
    outline: 0;
  }
}

/* The switch - the box around the slider */
.switch {
  position: relative;
  display: inline-block;
  vertical-align: bottom;
  width: 54px;
  height: 28px;
  margin: 0;
}

/* Hide default HTML checkbox */
.switch input {
  opacity: 0;
  width: 0;
  height: 0;
  padding: 0;
  margin: 0;
}

/* The slider */
.slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: #909090;
  transition: 0.4s;
}

.slider:before {
  position: absolute;
  content: "";
  height: 20px;
  width: 20px;
  left: 4px;
  bottom: 4px;
  background-color: #f9f9f9;
  transition: 0.4s;
}

input:checked + .slider {
  background-color: #1d7484;
}

input:focus + .slider {
  box-shadow: 0 0 1px #144f5a;
}

input:checked + .slider:before {
  transform: translateX(26px);
}

input:disabled + .slider {
  cursor: not-allowed;
}

input:disabled + .slider::before {
  background-color: #aeaeae;
}