@import 'normalize.css';

@font-face {
  font-family: SourceCodePro;
  src: url('../fonts/SourceCodeVariable-Roman.subset.woff2');
}

@font-face {
  font-family: SourceCodeProItalic;
  src: url('../fonts/SourceCodeVariable-Italic.subset.woff2');
}

@font-face {
  font-family: Xanh Mono Regular;
  src: url('../fonts/XanhMono-Regular.woff2');
}

@font-face {
  font-family: Xanh Mono Italic;
  src: url('../fonts/XanhMono-Italic.woff2');
}

:root {
  --root_ptsize: 15px;
  --xanhmono: 20px;
  --bg: whitesmoke;
  --txt: black;
  --solid-border: 1px solid var(--txt);
  --header_height: 51px;
  --content_margin: calc(var(--header_height));
  --h1_basesize: 3.5rem;
  --SourceCodePro: 'wght' 380;
  --SourceCodeProItalic: 'wght' 380;
  --SourceCodeProItalicBold: 'wght' 600;
}

* {
  list-style: none;
  box-sizing: border-box;
  margin: 0;
  font-weight: normal;
}

a {
  text-decoration: none;
}

html {
  scroll-behavior: smooth;
}

body {
  background: var(--bg);
  transition: background 1s;
  color: var(--txt);
  font-family: SourceCodePro;
  font-variation-settings: var(--SourceCodePro);
  font-feature-settings: "liga", "kern";
  font-size: var(--root_ptsize);
  line-height: 1.45;
  padding: 4rem 0 4rem 0;
}

a {
  cursor: pointer;
  color: inherit;
}

@keyframes fadein {
  0% {opacity: 0;}
  100% {opacity: 1;}
}

.home {
  font-family: Xanh Mono Regular, monospace;
  font-size: var(--xanhmono);
}

main {
  position: relative;
  display: inline-block;
  left: 75px;
  width: calc(75% - 25px - 0.6rem);
  opacity: 1;
  animation: fadein 0.5s;
  vertical-align: top;
  padding-bottom: calc(var(--header_height) * 2);
}

main img {
  width: calc(139%);
}

main blockquote + p img {
  margin-top: 0;
}

main p {
  width: 72%;
  line-height: 1.7;
}

main strong {
  font-variation-settings: 'wght' 600;
  font-weight: 600;
}

main em {
  font-family: SourceCodeProItalic;
  font-variation-settings: var(--SourceCodeProItalic);
  font-style: normal;
}

main strong em {
  font-family: SourceCodeProItalic;
  font-variation-settings: var(--SourceCodeProItalicBold);
  font-style: normal;
}

main p a {
  border-bottom: 1px dotted var(--txt);
}

main p a:hover {
  border-bottom: var(--solid-border);
}

main blockquote {
  width: calc(28% - 40px + 1rem);
  float: right;
  margin: 0;
  padding-left: 1rem;
  border-left: var(--solid-border);
}

main blockquote p {
  width: 100%;
  margin-bottom: 0.25rem !important;
}

main blockquote a {
  transition: all 0.3s;
  border-bottom: none;
  font-variation-settings: 'wght' 650 !important;
}

main blockquote a:hover {
  border-bottom: 1px dotted black;
  transition: font-variation-settings 0.3s;
}

main blockquote img {
  width: 100%;
}

.indent {
  margin-left: 1.2rem;
}

.wrapper {
  position: relative;
  z-index: 1;
  width: 80%;
  min-width: 900px;
  max-width: 1500px;
  margin: auto;
}

.wrapper p {
  margin: 0;
  margin-bottom: 1rem;
}

.sidebar {
  position: sticky;
  top: 4rem;
  display: inline-block;
  width: calc(20% - 50px);
  animation: fadein 0.5s;
  padding-top: 0.18rem;
  font-family: Xanh Mono Regular, monospace;
  font-size: var(--xanhmono);
}

.sidebar ul {
  padding: 0;
}

.sidebar li {
  display: block;
  white-space: nowrap;
  overflow: hidden;
}

.sidebar li::before {
  content: "> ";
}

.sidebar a {
  transition: all 0.3s;
}

.sidebar a:hover {
  font-family: Xanh Mono Italic, monospace;
  /*font-variation-settings: 'wght' 550;*/
  transition: all 0.3s;
}

h2 /* post date */ {
  font-family: Xanh Mono Regular, monospace;
  font-size: var(--xanhmono);
  margin-bottom: 1.5rem;
  line-height: calc(var(--xanhmono) * 1.55);
}

.post_date {
  padding: 0.18rem 0.3rem;
  background: var(--txt);
  color: var(--bg);
  border: 1px solid black;
}

.post_title {
  padding: 0.18rem 0.5rem;
  border: 1px dotted black;
  border-left: 1px solid black;
}

h3, h4 /* larger in-post text */ {
  font-family: Xanh Mono Regular, monospace;
  font-size: 1.7rem;
  line-height: 1.4;
}

h3 {
  margin-bottom: 1rem;
}

h3 em {
  font-family: Xanh Mono Italic, monospace;
}

h4 {
  font-family: Xanh Mono Italic, monospace;
  padding-left: 0.5em; /* width of quotation mark */
  text-indent: -0.5em;
  position: relative;
  left: -0.5em;
}

h4::before /* pull quotes */ {
  content: "“";
}

h4::after /* pull quotes */ {
  content: "”";
}

h5, h5 em, h5 a, h6, h6 em, h6 a, h6 del /* caption */ {
  font-size: 0.8rem;
  font-variation-settings: 'wght' 420;
}

h5 {
  margin: 0.75em 0 1.5rem 0;
  width: 72%;
}

h6 /* image caption */ {
  position: relative;
  margin: -2rem 0 1.5rem 0;
  width: 72%;
}

h5 a, h6 a {
  border-bottom: 1px dotted var(--txt);
}

h5 a:hover, h6 a:hover {
  border-bottom: var(--solid-border);
}

.fit_text_to_width {
  font-size: 22.5cqw; 
  font-family: Xanh Mono Regular; 
  line-height: 1;
}

main ul {
  padding-left: 1.75rem;
  border-left: var(--solid-border);
  width: calc(80% - 50px);
  margin: 1.5rem 0 1rem 0;
  line-height: 1.7rem;
}

main ul p {
  width: 100%;
}

main ul.index {
  font-family: Xanh Mono Regular, monospace;
  font-size: var(--xanhmono);
  border: none;
  padding: 0;
}

main ul.index li {
  margin-bottom: 0.75rem;
  line-height: 1.5;
  padding-left: 6.9rem;
  text-indent: -6.9rem;
}

main ul.index li a {
  transition: all 0.3s;
}

main ul.index li a:hover .index_post_title {
  font-family: Xanh Mono Italic, monospace;
}

main ul ol {
  width: 100%;
}

/* about */
main#about h3 {
  font-family: Xanh Mono Italic, monospace;
  margin-bottom: 1.5rem;
  line-height: 1.6;
}

main#about p {
  width: 100%;
}

main#about a {
  font-family: Xanh Mono Regular, monospace;
  border: none;
}

main#about a::before {
  content: "[";
  margin-right: 0.3rem;
}

main#about a::after {
  content: "]";
  margin-left: 0.3rem;
}

main#about a:hover {
  font-family: Xanh Mono Italic, monospace;
  border: none;
}

main#about a:hover::before, main#about a:hover::after {
  font-family: Xanh Mono Regular, monospace;
}

main#about ul {
  width: 100%;
  padding: 0;
  margin: 0 0 6rem 0;
  border: none;
}

main#about ul li {
  list-style: none;
  padding-left: 2.1rem;
  text-indent: -2.1rem;
  margin-bottom: 0.25rem;
}

main#about ul li::before {
  content: "# ";
}

main#about ul li:first-child::before {
  content: "";
}

main#about em {
  font-family: Xanh Mono Italic, monospace;
  font-size: var(--xanhmono);
}

main#about h5 a {
  font-family: SourceCodePro, monospace;
  border: none;
}

main#about h5 a:hover {
  font-family: SourceCodeProItalic, monospace;
}

main#about h5 a::before, main#about h5 a::after {
  content: "";
}

ol {
  padding: 0;
  margin: 0 0 1rem 1.7rem;
  width: 72%;
}

ol li {
  list-style: decimal;
  line-height: 1.7;
}

main ol p, main ol h6, main ol ul {
  width: 100%;
}

main ol blockquote {
  width: calc(28% - 40px + 1rem);
  position: absolute;
  left: calc(72% + 40px + 1rem);
}

span.highlight {
  background: #DCE4E4;
}

hr {
  border: none;
  border-top: var(--solid-border);
  margin: 2rem 0;
  width: 100%;
}

main img {
  margin: 1rem 0;
}

main img[src*="#small"] {
  width: 100%;
}

main img[src*="#vertical"] {
  height: 75vh;
  width: auto;
}

main .responsive_iframe {
  position: relative;
  width: 100%;
  padding-bottom: 56.25%;
  margin: 0 0 2.5rem 0;
}

main .responsive_iframe + h6 /* video caption */ {
  margin: -1rem 0 1.5rem 0;
}

main iframe {
  position: absolute;
  top: 0;
  left: 0;
  bottom: 0;
  right: 0;
  width: 100%;
  height: 100%;
  margin-top: 1rem;
}

main blockquote p, main blockquote p em, main blockquote p a {
  font-size: 0.8rem;
  line-height: 1.5;
  font-variation-settings: 'wght' 400;
}

main blockquote p strong {
  font-size: 0.8rem;
  line-height: 1.5;
  font-variation-settings: 'wght' 500;
}

main ol ul li {
  list-style: none;
}

@media only screen and (max-width: 1000px) {
  :root {
    --root_ptsize: 15px;
  }
  body {
    padding: 0;
  }
  .wrapper {
    min-width: auto;
    width: 90vw;
  }
  .sidebar{
    display: block;
    width: 100%;
    border-bottom: 1px solid var(--txt);
    background: var(--bg);
    margin: 0 0 3rem 0;
    padding: 0.8rem 0 0.6rem 0;
    position: sticky;
    top: 0px;
    z-index: 999;
  }
  .sidebar ul li {
    display: inline-block;
  }
  .sidebar li::before {
    content: " / ";
  }
  .sidebar li:first-child::before {
    content: "";
  }
  main {
    display: block;
    left: 0;
    width: 100%;
  }
  h5, h6 {
    width: 100%;
  }
  .fit_text_to_width {
    font-size: 35cqw; 
  }

}

@media only screen and (max-width: 710px) {
  :root {
    --root_ptsize: 14px;
    --header_height: 36px;
  }
  body {
    line-height: 1.5;
  }
  main p, main ul, ol, h5 {
    width: 100%;
  }

  main ol p, main ol h6, main ol ul {
    width: calc(100% - 2rem);
  }

  main img {
    width: 100%;
  }

  main img[src*="#vertical"] {
    width: 100%;
    height: auto;
  }

  main blockquote + p img {
    margin-top: 1rem;
  }

  main blockquote {
    width: 100%;
    float: none;
    border-left: none;
    border-top: 1px solid var(--txt);
    border-bottom: 1px solid var(--txt);
    padding: 0.75rem 0;
    margin-bottom: 1rem;
  }

  main ol blockquote {
    position: relative;
    left: 0;
    width: 100%;
    float: none;
    border-left: none;
    border-top: 1px solid var(--txt);
    border-bottom: 1px solid var(--txt);
    padding: 0.75rem 0;
    margin-bottom: 1rem;
  }
  
  h3, h4 {
    font-size: 1.5rem;
  }
  h4 {
    left: 0;
  }
}