@charset "UTF-8";
:root {
  --main-color: #dc3545;
  --main-color-light: #fff3f3;
  --text-color: rgb(85, 85, 85);
  --caption-font-color: rgb(100, 100, 100);
  --caption-font-weight: 500;
  --example-bg-color: #ffe3e3; }

/* 800px is the cut-off point */
* {
  /* Don't set font family for everything, as it messes with code blocks */
  /* font-family: 'avenir next' ,'avenir', sans-serif */ }

/* ===================================== */
/* HEADING NUMBERING */
/* ===================================== */
body {
  counter-reset: h2counter; }

.content h1 {
  counter-reset: h2counter; }

.content h2 {
  counter-reset: h3counter; }

.content h3 {
  counter-reset: h4counter; }

.content h2:before {
  content: counter(h2counter) ".  ";
  counter-increment: h2counter; }

.content h3:before {
  content: counter(h2counter) "." counter(h3counter) ".  ";
  counter-increment: h3counter; }

.content h4:before {
  content: counter(h2counter) "." counter(h3counter) "." counter(h4counter) ".  ";
  counter-increment: h4counter; }

/* END OF HEADING NUMBERING */
/* Use rem for body, use em for everything else */
/* This controls the main font size */
body {
  font-size: 1.2rem; }

input {
  font-size: 0.9rem; }

p, li, div {
  /* O.k. size on mobile */
  font-size: 2.5vw; }

@media (min-width: 800px) {
  p, li, div {
    /* 1.3rem was a little too large */
    font-size: 1.1rem; } }

figcaption p {
  font-size: 80%;
  font-style: italic;
  color: gray;
  text-align: center; }

/* Allow for special paragraphs that have centered text */
div.content p.centered {
  text-align: center; }

/* Center single images on the page */
div.box {
  margin: auto; }

/* ========================================================================= */
/* OK, WARNING, ERROR SPANS                                                  */
/* ========================================================================= */
span.ok {
  color: #00b300;
  font-weight: bold; }

span.warning {
  color: orange;
  font-weight: bold; }

span.error {
  color: red;
  font-weight: bold; }

/* ========================================================================= */
/* LISTS                                                                     */
/* ========================================================================= */
.content ul {
  padding-inline-start: 7vw; }
  .content ul li {
    padding: 0.3em 0px; }

@media (min-width: 800px) {
  .content ul {
    padding-inline-start: 40px; } }

.content #TableOfContents ul li {
  padding: 0px 0px; }

/* ========================================================================= */
/* BREADCRUMBS                                                               */
/* ========================================================================= */
.breadcrumbs {
  font-size: 1.0em; }

.breadcrumbs li {
  display: inline; }

/* ========================================================================= */
/* MATHJAX                                                                   */
/* ========================================================================= */
/* This fixes an issue where the tops of some symbols in an equation where clipped */
code.has-jax span {
  clip: unset !important; }

/* Should be rem, not em here! */
code.has-jax span {
  /* Disabled this as it was creating rendering issues with latex subscript/superscript */
  /* font-size: 0.8rem !important; */ }

/* ========================================================================= */
/* BLOCK QUOTES                                                              */
/* ========================================================================= */
blockquote {
  margin-top: 10px;
  margin-bottom: 10px;
  margin-left: 1em;
  padding-left: 1em;
  border-left: 3px solid #ccc; }

@media (min-width: 800px) {
  blockquote {
    margin-left: 50px;
    padding-left: 15px; } }

/* markdown wraps the text inside a p element */
blockquote p {
  font-size: 1em; }

@media (min-width: 800px) {
  blockquote p {
    font-size: 1.2rem; } }

/* ========================================================================= */
/* PAGINATION                                                                */
/* ========================================================================= */
/* Pagination HTML is created with the Hugo template: {{ template "_internal/pagination.html" . }} */
ul.pagination {
  width: 100%;
  padding: 0;
  /* Add some vertical margin */
  margin: 1em 0;
  /* Display page numbers and arrows in row, not column */
  display: flex;
  justify-content: center;
  /* Hide the bullets */
  list-style-type: none; }

ul.pagination li {
  /* Add space between each number and arrow */
  margin-left: 0.5em;
  margin-right: 0.5em; }

/* ========================================================================= */
/* POST STYLING                                                              */
/* ========================================================================= */
/* Disable link styling for post titles */
.post-title {
  text-decoration: none;
  color: inherit; }

article {
  /* This forces content to stay within the bounds of the article element and wrap if needed */
  width: 100%; }

/* ========================================================================= */
/* MAIN PAGE STYLING                                                         */
/* ========================================================================= */
html {
  height: 100%; }

/*body {
    display: flex;
    flex-direction: column;
    background-color: rgb(241, 241, 241);
}
@media (min-width: 800px) {
    body {
        height: 100%;        
        flex-direction: row;        
    }
}*/
/* .left-column-outer {
    width: 100%;
    margin: auto;
    display: flex;     
    flex-direction: column;
    align-items: center; 
    
}
@media (min-width: 800px) {
    .left-column-outer {
        width: 30%;
        max-width: 450px;
    }
}

.left-column {
    width: 90%;
    margin-top: 1em;
} */
/* Left column contains logo and menu */
/* @media (max-width: 800px) {
    .left-column {
        min-height: 100%;
        display: flex;
        flex-flow: row;
        align-items: center;
        justify-content: space-around;

        background-color: white;
        box-shadow: 0 0 1px rgba(0, 0, 0, 0.15); 
    }

    .header-section-2 {
        margin: 1.0em;
        flex-grow: 2;
    }

    .header-section-3 {
        display: none;
    }
}

@media (min-width: 800px) {
    .left-column {
        min-height: 100%;
        display: flex;
        flex-flow: column;
        align-items: center;
        justify-content: flex-start;

        background-color: white;

        box-shadow: 0 0 1px rgba(0, 0, 0, 0.15); 
    }
} */
/* ========================================================================= */
/* RECENT UPDATES                                                            */
/* ========================================================================= */
div.recent-updates {
  margin: 1em;
  display: flex;
  flex-direction: column; }

div.recent-updates .link {
  text-decoration: none; }

div.recent-updates .item {
  border: solid 1px rgba(100, 100, 100, 0.5);
  border-radius: 5px;
  margin: 10px 0px;
  padding: 5px;
  /* Keep width sensible for left column (when is desktop mode) */
  width: 250px; }

div.recent-updates .item:hover {
  background-color: #e6e6e6; }

div.recent-updates h2 {
  font-size: 1.0em;
  margin: 0px;
  margin-left: 10px; }

div.recent-updates .modified {
  font-size: 0.7em;
  margin: 0px;
  margin-left: 10px;
  font-style: italic; }

div.recent-updates .description {
  font-size: 0.8em;
  margin: 0px;
  margin-left: 10px; }

/* ========================================================================= */
/* RIGHT COLUMN                                                              */
/* ========================================================================= */
.right-column {
  width: 100%; }

@media (min-width: 800px) {
  .right-column {
    width: 70%; } }

/* Right column contains page content */
.right-column {
  height: 100%;
  flex: 1;
  display: flex;
  flex-flow: column;
  align-items: center; }

.inner-right-column {
  width: 90%;
  max-width: 900px;
  margin-top: 1em;
  background-color: white;
  /* Add subtle border to right-hand content */
  box-shadow: 0 0 1px rgba(0, 0, 0, 0.15);
  /* Stops long URLs and strings going of the right-hand side of the column */
  word-break: break-word; }

/* Padding between border of right-hand inner column and content */
main {
  padding: 5vw; }

@media (min-width: 800px) {
  main {
    padding: 80px; } }

.homepage-post-content {
  padding-bottom: 50px; }

/* Add a bit of space below the footer before the page ends */
footer {
  padding-bottom: 20px; }

/* ========================================================================= */
/* IMAGE STYLING                                                             */
/* ========================================================================= */
figure {
  /* Setting these margins to 0 fixes the issue where the user agent stylesheet would set them to
    40px and prevent the images for spanning the entire width of the content div */
  margin-inline-start: 0;
  margin-inline-end: 0; }

figure img {
  width: 100%;
  /* Force images to stay within the confines of the parent container */ }

/* ========================================================================= */
/* PROMPTS                                                                   */
/* ========================================================================= */
aside.prompt {
  margin-block-start: 1em;
  margin-block-end: 1em;
  border-left-width: 4px;
  border-left-style: solid;
  border-radius: 2px;
  box-shadow: 0 2px 2px 0 rgba(0, 0, 0, 0.14), 0 1px 5px 0 rgba(0, 0, 0, 0.12), 0 3px 1px -2px rgba(0, 0, 0, 0.2);
  box-sizing: border-box; }

aside.prompt .title {
  font-weight: 700;
  padding-left: 1em; }

aside.prompt .title .title-text {
  padding-left: 1em; }

aside.prompt div.content {
  margin: 0;
  padding-left: 1em; }

aside.prompt div.content p {
  margin: 0;
  padding: 0.8em;
  font-size: 0.8em; }

/* QUESTION */
aside.question {
  border-left-color: #64dd17; }

aside.question .title {
  background-color: rgba(100, 221, 23, 0.1); }

aside.question .title .icon {
  color: #64dd17; }

/* WARNING */
aside.warning {
  border-left-color: #ff9100; }

aside.warning .title {
  background-color: rgba(255, 145, 0, 0.1); }

aside.warning .title .icon {
  color: #ff9100; }

/* NOTE */
aside.note {
  border-left-color: #651fff; }

aside.note .title {
  background-color: rgba(101, 31, 255, 0.1); }

aside.note .title .icon {
  color: #651fff; }

/* ========================================================================= */
/* DISQUS STYLING                                                             */
/* ========================================================================= */
/* Divider between the end of the page/related content/tags and the start of the Disqus comments */
.disqus-divider {
  height: 30px; }

/* ========================================================================= */
/* MENU STYLING                                                         */
/* ========================================================================= */
/* ========================================================================= */
/* FOOTER                                                                    */
/* ========================================================================= */
/* Footer contains copyright and "Powered by Hugo" */
footer {
  width: 100%;
  display: flex;
  justify-content: center; }

/* ========================================================================= */
/* MATRIX (using a table)                                                    */
/* ========================================================================= */
/* This adds matrix looking brackets to the side of the table */
.matrix {
  position: relative; }

.matrix:before, .matrix:after {
  content: "";
  position: absolute;
  top: 0;
  border: 1px solid #000;
  width: 6px;
  height: 100%; }

.matrix:before {
  left: -6px;
  border-right: 0px; }

.matrix:after {
  right: -6px;
  border-left: 0px; }

table.matrix tr:nth-of-type(even) {
  background: white; }

table.matrix tr:nth-of-type(odd) {
  background: white; }

.matrix td {
  padding: 5px;
  text-align: center; }

.matrix {
  border-spacing: 0px; }

.matrix td {
  width: 2em; }

/* ========================================================================= */
/* CALCULATORS                                                               */
/* ========================================================================= */
.calculator input {
  width: 6em;
  height: 1.5em; }

.calculator table tr:nth-of-type(even) {
  background: white; }

.calculator table tr:nth-of-type(odd) {
  background: white; }

/* ========================================================================= */
/* HBOX and VBOX                                                             */
/* ========================================================================= */
/* Handy hbox and vbox elements that can be used around the site to layout child
elements */
div.hbox {
  display: flex;
  flex-direction: row;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center; }

div.vbox {
  display: flex;
  flex-direction: column;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center; }

/* ========================================================================= */
/* STRIKE-TRHOUGH (DEL)                                                      */
/* ========================================================================= */
del {
  text-decoration: line-through;
  background-color: #fbb;
  color: #555; }

/* ========================================================================= */
/* REFERENCES                                                                */
/* ========================================================================= */
#return-to-top {
  position: fixed;
  bottom: 20px;
  right: 20px;
  background: black;
  background: rgba(0, 0, 0, 0.7);
  width: 50px;
  height: 50px;
  display: block;
  text-decoration: none;
  -webkit-border-radius: 35px;
  -moz-border-radius: 35px;
  border-radius: 35px;
  display: none;
  -webkit-transition: all 0.3s linear;
  -moz-transition: all 0.3s ease;
  -ms-transition: all 0.3s ease;
  -o-transition: all 0.3s ease;
  transition: all 0.3s ease; }

#return-to-top i {
  color: #fff;
  margin: 0;
  position: relative;
  left: 16px;
  top: 13px;
  font-size: 19px;
  -webkit-transition: all 0.3s ease;
  -moz-transition: all 0.3s ease;
  -ms-transition: all 0.3s ease;
  -o-transition: all 0.3s ease;
  transition: all 0.3s ease; }

#return-to-top:hover {
  background: rgba(0, 0, 0, 0.9); }

#return-to-top:hover i {
  color: #fff;
  top: 5px; }

@media (min-width: 768px) {
  .bd-sidebar {
    position: sticky !important;
    top: 0;
    height: 100vh; } }

p, li, div, td, th, input, code.has-jax {
  line-height: 1.7;
  color: var(--text-color); }

.header-section-1 {
  display: flex;
  flex-flow: column;
  align-items: center;
  flex-grow: 0; }

.logo-img {
  width: 70%;
  /* max-width prevents image getting too large when on mobile device */
  max-width: 300px; }

.logo-img img {
  width: 100%; }

.site-title {
  color: #333333;
  font-size: 5vw;
  font-weight: 700;
  display: flex;
  justify-content: center;
  text-align: center; }

@media (min-width: 768px) {
  .site-title {
    font-size: 24px; } }

.site-title a {
  text-decoration: none;
  color: inherit; }

.site-description {
  color: #333333;
  font-size: 3vw;
  font-weight: 400;
  margin-top: 7px;
  width: 90%;
  text-align: center; }

@media (min-width: 768px) {
  .site-description {
    font-size: 1.0rem; } }

/* ========================================================================= */
/* MENU                                                                      */
/* ========================================================================= */
.menu-nav {
  display: block !important;
  padding-left: .25rem;
  margin-left: -.25rem;
  overflow-y: auto;
  margin-top: 10px; }
  .menu-nav ul ul {
    margin-left: 5px; }
  .menu-nav a {
    padding: .375rem .75rem;
    margin-top: .125rem;
    margin-left: 0.1rem;
    color: #3c3c3c;
    font-size: 1.2em;
    text-decoration: none; }
  @media (min-width: 768px) {
    .menu-nav a {
      font-size: 0.9em; } }
.menu-list {
  list-style-type: none;
  margin-left: 0px;
  padding-left: 20px; }
  .menu-list .menu-list {
    padding-left: 5px; }

.menu-chevron-link-wrapper {
  display: flex; }

.menu-chevron {
  display: inline;
  content: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 16 16'%3e%3cpath fill='none' stroke='rgba%280,0,0,.5%29' stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M5 14l6-6-6-6'/%3e%3c/svg%3e");
  transition: transform 0.35s ease;
  cursor: pointer; }
  .menu-chevron.show {
    transform: rotate(90deg); }
  .menu-chevron.hidden {
    visibility: hidden; }

/* ========================================================================= */
/* HOMEPAGE CONTENT                                                          */
/* ========================================================================= */
.col-centered {
  float: none;
  margin: 0 auto; }

#recent-posts h1 {
  font-size: 1.5em;
  margin-bottom: 20px; }

/* ========================================================================= */
/* TOC                                                                       */
/* ========================================================================= */
@media (min-width: 768px) {
  #right-hand-column {
    height: 100vh;
    position: sticky;
    top: 0; } }

#toc {
  margin-top: 50px;
  margin-bottom: 15px; }
  #toc a {
    text-decoration: none;
    font-size: 0.8em; }
  #toc ul {
    list-style-type: none;
    padding-inline-start: 20px; }
  #toc li {
    line-height: 1.5; }

/* ========================================================================= */
/* MAIN CONTENT (center column)                                              */
/* ========================================================================= */
article {
  padding-top: 20px; }
  article address {
    display: inline; }

.home-page-content {
  padding-top: 40px; }

/* ========================================================================= */
/* HEADING AND PARAGRAPH STYLING                                             */
/* ========================================================================= */
p, h1, h2, h3, ul, li, a, div, td, th, input {
  font-family: 'avenir next' ,'avenir', sans-serif;
  word-break: break-word; }

h1 {
  font-size: 2.5em;
  font-weight: bold; }

h2 {
  font-size: 1.5em;
  font-weight: bold;
  margin-top: 1.5em;
  margin-bottom: 1.5em;
  border-bottom: 4px solid var(--main-color);
  width: 100%;
  padding-bottom: 3px; }

h3 {
  font-size: 1.2em;
  font-weight: bold;
  margin-bottom: 1.0em; }

h4 {
  font-size: 1em;
  font-weight: bold; }

.flex-right {
  display: flex;
  justify-content: flex-end; }

div.sect2 {
  margin-bottom: 10px; }

/* ========================================================================= */
/* POST/PAGE METADATA                                                        */
/* ========================================================================= */
.published-modified-wrapper {
  margin-bottom: 2.0em; }

/* ========================================================================= */
/* MATHJAX                                                                   */
/* ========================================================================= */
code.has-jax {
  font-size: 1em; }

/* ========================================================================= */
/* CODE                                                                      */
/* ========================================================================= */
pre, .pre {
  overflow-x: auto;
  overflow-y: hidden;
  /* overflow:   scroll; */ }

pre {
  background-color: #222;
  color: #ddd;
  white-space: pre;
  hyphens: none;
  position: relative;
  margin-bottom: 0px; }

/* Styling for inline code (no pre element). Make sure not to select code elements
which have the class `has-jax`, as this is used for inline math and MathJAX
rendering.
*/
code:not(.has-jax) {
  border-radius: 5px;
  -moz-border-radius: 5px;
  -webkit-border-radius: 5px;
  border: 1px solid #BCBEC0;
  padding: 2px; }

pre code:not(.has-jax) {
  display: block;
  padding: 1.5em 1.5em;
  white-space: pre;
  font-size: 0.8em;
  line-height: 2;
  border: 0px; }

@media (min-width: 800px) {
  pre code:not(.has-jax) {
    font-size: .876rem; } }

div.highlight {
  margin-bottom: 1rem; }

div.highlight > div > table > tbody > tr > td:nth-child(1) > pre > code > span {
  margin-right: 0 !important;
  padding: 0 !important; }

/* ========================================================================= */
/* TABLES
/* ========================================================================= */
.table-wrapper {
  overflow-x: auto; }

/* Center tables inside page content */
div.content table {
  margin-left: auto;
  margin-right: auto;
  font-size: 1.1rem;
  /* The right-column has break-word set to stop long strings/URLs from going off the side
    of the page. We need to however set word-break back to normal here otherwise column sizes
    look weird */
  word-break: normal;
  border-collapse: collapse;
  /* Add spacing at bottom before next element in page content */
  margin-bottom: 1em; }

div.content th {
  background-color: var(--main-color);
  color: white;
  font-weight: normal;
  padding: 10px; }
  div.content th p {
    color: white; }

div.content td, div.content th {
  /* O.k. size on mobile */
  font-size: 2.5vw;
  border: 1px solid #d2d2d2; }

@media (min-width: 800px) {
  div.content {
    /* Make tabular data a little smaller than standard paragraphs */ }
    div.content td, div.content th, div.content td ul li, div.content td p, div.content th p {
      font-size: 0.95rem;
      line-height: 1.5; } }

div.content td ul {
  padding-inline-start: 8px; }

div.content td {
  padding: 10px; }

div.content td ul {
  display: inline-block;
  /* This makes list identifiers look good within table cells when contents are centered */ }

div.content td li {
  text-align: left;
  /* Left aligns text in lists */ }

/* OK, WARNING AND ERROR ROWS IN A TABLE */
div.content tr.ok {
  background-color: #d7fcd3; }

div.content tr.warning {
  background-color: #f5f5d3; }

div.content tr.error {
  background-color: #ffe3e3; }

table.code th, table.code td {
  font-family: monospace; }

/* UNSTYLED TABLES (for layout) */
table.unstyled > tbody > tr > td {
  padding: 0px;
  background-color: transparent;
  border: none; }

/* AsciiDoc wraps all text within list elements in a p element, let's get rid of
margin block start and end values (set by user agent stylesheet)
so the list elements do not have too much vertical padding between items. */
ul li p, ol li p {
  margin-block-start: 0;
  margin-block-end: 0; }

.tableblock td {
  padding: 10px; }
  .tableblock td p {
    line-height: 1.0;
    margin: 0; }

caption.title {
  color: var(--caption-font-color);
  font-size: 0.9em;
  font-style: italic;
  font-weight: var(--caption-font-weight); }

.overflow {
  overflow-x: auto; }

.table-800 {
  width: 800px; }

.table-1000 {
  width: 1000px; }

.table-1200 {
  width: 1200px; }

/* ========================================================================= */
/* IMAGES                                                                    */
/* ========================================================================= */
.imageblock {
  margin-top: 1em;
  margin-bottom: 1em;
  /* Make image caption text a little smaller than the main paragraph text and make
    it italic */
  /* This centers the image */ }
  .imageblock .title {
    font-size: 0.8em;
    font-style: italic;
    text-align: center; }
  .imageblock .content {
    display: flex;
    justify-content: center; }
  .imageblock img {
    max-width: 100%; }

.imagerow {
  display: flex;
  justify-content: center; }
  .imagerow .content {
    display: flex; }

/* Disable automatic heading numbering because AsciiDoc will
do this for us */
.content .sect1 h2::before {
  counter-reset: unset;
  content: none; }

.content .sect1 h3::before {
  counter-reset: unset;
  content: none; }

.content .sect1 h4::before {
  counter-reset: unset;
  content: none; }

.admonitionblock {
  margin-top: 1em;
  margin-bottom: 1em; }
  .admonitionblock.tip {
    background-color: #e6ffe6; }
  .admonitionblock.note {
    background-color: #fcfced; }
  .admonitionblock.warning {
    background-color: #ffe6e6; }
  .admonitionblock table tbody tr {
    background-color: transparent !important; }
  .admonitionblock td {
    line-height: 1.7 !important; }

.admonitionblock-md {
  margin-top: 1em;
  margin-bottom: 1em;
  display: flex;
  outline: 1px solid silver; }
  .admonitionblock-md .icon {
    width: 65px;
    padding: 10px;
    outline: 1px solid silver;
    display: flex;
    justify-content: center;
    align-items: center; }
  .admonitionblock-md .content {
    margin: 10px;
    align-items: center; }
  .admonitionblock-md.tip {
    background-color: #e6ffe6; }
  .admonitionblock-md.note {
    background-color: #fcfced; }
  .admonitionblock-md.warning {
    background-color: #ffe6e6; }

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

.eq-vars p {
  text-align: center;
  font-size: 0.9rem; }

/* ========================================================================= */
/* CODE                                                                      */
/* ========================================================================= */
.listingblock .title {
  color: var(--caption-font-color);
  font-size: 1.0em;
  font-style: italic;
  font-weight: var(--caption-font-weight); }

.listingblock pre.highlight {
  color: black; }

/* ========================================================================= */
/* EXAMPLE BLOCKS                                                            */
/* ========================================================================= */
.exampleblock {
  background-color: var(--example-bg-color);
  padding: 10px;
  margin-bottom: 20px; }
  .exampleblock .title {
    color: var(--caption-font-color);
    font-size: 1.0em;
    font-style: italic;
    font-weight: var(--caption-font-weight); }

/* ========================================================================= */
/* BIBLIOGRAPHY                                                              */
/* ========================================================================= */
a[href^="#bib"] {
  font-size: 70%;
  margin: left;
  vertical-align: .5em; }

ul.bibliography li p {
  font-size: 0.9em; }

/* ========================================================================= */
/* AUTHOR CARDS                                                              */
/* ========================================================================= */
.author-card {
  display: flex; }
  .author-card img {
    margin-right: 10px; }

/* ========================================================================= */
/* POSITIVES/NEGATIVES                                                       */
/* ========================================================================= */
span.pro {
  color: green; }

span.con {
  color: var(--main-color); }

/* ========================================================================= */
/* GOOD/OK/BAD                                                               */
/* ========================================================================= */
.good {
  color: green;
  font-weight: bold; }

.ok {
  color: orange;
  font-weight: bold; }

.bad {
  color: var(--main-color);
  font-weight: bold; }

/* ========================================================================= */
/* CIRCUITJS                                                                 */
/* ========================================================================= */
.circuitjs-container {
  padding: 20px; }
  .circuitjs-container iframe {
    margin-bottom: -30px; }

/* ========================================================================= */
/* WORKED EXAMPLES                                                           */
/* ========================================================================= */
.worked-example {
  background-color: var(--main-color-light);
  padding: 1em;
  margin-bottom: 1em; }