/* Typography and Reset */
@font-face {
  font-family: 'CMS';
  src: url('../fonts/cmun-serif/cmunrm.eot');
  src:
    url('../fonts/cmun-serif/cmunrm.eot?#iefix') format('embedded-opentype'),
    url('../fonts/cmun-serif/cmunrm.woff') format('woff'),
    url('../fonts/cmun-serif/cmunrm.ttf') format('truetype'),
    url('../fonts/cmun-serif/cmunrm.svg#cmunrm') format('svg');
  font-weight: normal;
  font-style: normal;
}

@font-face {
  font-family: 'CMS';
  src: url('../fonts/cmun-serif/cmunbx.eot');
  src:
    url('../fonts/cmun-serif/cmunbx.eot?#iefix') format('embedded-opentype'),
    url('../fonts/cmun-serif/cmunbx.woff') format('woff'),
    url('../fonts/cmun-serif/cmunbx.ttf') format('truetype'),
    url('../fonts/cmun-serif/cmunbx.svg#cmunbx') format('svg');
  font-weight: bold;
  font-style: normal;
}

@font-face {
  font-family: 'CMS';
  src: url('../fonts/cmun-serif/cmunti.eot');
  src:
    url('../fonts/cmun-serif/cmunti.eot?#iefix') format('embedded-opentype'),
    url('../fonts/cmun-serif/cmunti.woff') format('woff'),
    url('../fonts/cmun-serif/cmunti.ttf') format('truetype'),
    url('../fonts/cmun-serif/cmunti.svg#cmunti') format('svg');
  font-weight: normal;
  font-style: italic;
}

@font-face {
  font-family: 'CMS';
  src: url('../fonts/cmun-serif/cmunbi.eot');
  src:
    url('../fonts/cmun-serif/cmunbi.eot?#iefix') format('embedded-opentype'),
    url('../fonts/cmun-serif/cmunbi.woff') format('woff'),
    url('../fonts/cmun-serif/cmunbi.ttf') format('truetype'),
    url('../fonts/cmun-serif/cmunbi.svg#cmunbi') format('svg');
  font-weight: bold;
  font-style: italic;
}

@font-face {
  font-family: 'CMSS';
  src: url('../fonts/cmun-serif-slanted/cmunsl.eot');
  src:
    url('../fonts/cmun-serif-slanted/cmunsl.eot?#iefix') format('embedded-opentype'),
    url('../fonts/cmun-serif-slanted/cmunsl.woff') format('woff'),
    url('../fonts/cmun-serif-slanted/cmunsl.ttf') format('truetype'),
    url('../fonts/cmun-serif-slanted/cmunsl.svg#cmunsl') format('svg');
  font-weight: normal;
  font-style: normal;
}

@font-face {
  font-family: 'CMSS';
  src: url('../fonts/cmun-serif-slanted/cmunbl.eot');
  src:
    url('../fonts/cmun-serif-slanted/cmunbl.eot?#iefix') format('embedded-opentype'),
    url('../fonts/cmun-serif-slanted/cmunbl.woff') format('woff'),
    url('../fonts/cmun-serif-slanted/cmunbl.ttf') format('truetype'),
    url('../fonts/cmun-serif-slanted/cmunbl.svg#cmunbl') format('svg');
  font-weight: bold;
  font-style: normal;
}

:root {
  --bg-color: #ffffff;
  --body-text: #111111;
  --heading-text: #111111;
  --accent-color: #77c;
  --accent-hover: #55a;
  --secondary-text: #555555;
  --border-color: #cccccc;
  --code-bg: #f5f5f5;
  --highlight-color: #fff3cd;
  --article-width: 780px;
  --container-width: 1170px;
}

body {
  margin: 0;
  padding: 0;
  background-color: var(--bg-color);
  color: var(--body-text);
  font-family: 'CMS', 'Droid Sans', Helvetica, Arial, sans-serif;
  font-size: 18px;
  letter-spacing: -0.02rem;
  line-height: 1.5;
  text-align: left;
  -webkit-font-smoothing: antialiased;
}

@media (min-width: 768px) {
  body {
    text-align: justify;
  }
}

/* Layout */
.container {
  box-sizing: border-box;
  width: 100%;
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 15px 4rem;
}

main {
  width: 100%;
  max-width: var(--article-width);
  padding-top: 2.5rem;
}

@media (max-width: 768px) {
  .container {
    padding: 0 15px 2.5rem;
  }

  main {
    padding-top: 1.5rem;
  }
}

/* Headings */
h1, h2, h3, h4, h5, h6 {
  color: var(--heading-text);
  font-weight: bold;
  text-align: left;
}

h1 {
  font-family: 'CMS', 'Droid Serif', Georgia, Times, serif;
  font-size: 300%;
  line-height: 1.3;
  margin: 0 0 0.45em;
}

h2 {
  font-size: 150%;
  margin-top: 40px;
  margin-bottom: 20px;
}

h3 {
  font-size: 115%;
  margin-top: 30px;
  margin-bottom: 20px;
}

h4, h5, h6 {
  margin-top: 30px;
  margin-bottom: 10px;
}

.post-title {
  font-size: 260%;
  line-height: 1.3;
}

/* Paragraphs */
p {
  margin-top: 0;
  margin-bottom: 1em;
}

/* Links */
a {
  color: var(--accent-color);
  text-decoration: none;
}

a:hover {
  color: var(--accent-hover);
  text-decoration: none;
}

/* Code */
code, pre {
  font-family: ui-monospace, 'Fira Code', Consolas, monospace;
  font-size: 0.85em;
  background-color: var(--code-bg);
  border-radius: 4px;
}

code {
  padding: 0.2em 0.4em;
}

pre {
  margin-left: 18px;
  padding: 1rem;
  overflow-x: auto;
  border: none;
  border-radius: 10px;
  white-space: pre-wrap;
  word-wrap: break-word;
}

pre code {
  padding: 0;
  background-color: transparent;
  border: none;
}

/* Blockquotes */
blockquote {
  margin: 0 0 1.5em 18px;
  padding: 6px 20px;
  border: 0;
  border-radius: 10px;
  color: var(--body-text);
  background: rgb(245, 245, 245);
  font-family: 'CMSS', 'CMS', Helvetica, Arial, sans-serif;
  font-size: 18px;
}

/* Images & Figures */
figure {
  margin: 2em 0;
  text-align: center;
}

figure img {
  max-width: 100%;
  height: auto;
  border: 1px solid var(--border-color);
  border-radius: 4px;
}

figcaption {
  margin-top: 0.5em;
  font-size: 80%;
  color: #777777;
}

/* Tables */
table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5em 0;
}

th, td {
  padding: 0.75em;
  border: 1px solid var(--border-color);
  text-align: left;
}

th {
  background-color: var(--code-bg);
  color: var(--heading-text);
}

/* Table of Contents */
.table-of-contents {
  margin: 0 0 2rem;
  padding: 0.9rem 0;
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
  color: var(--secondary-text);
  font-family: 'CMS', 'Droid Sans', Helvetica, Arial, sans-serif;
  font-size: 85%;
  line-height: 1.35;
  text-align: left;
}

.table-of-contents summary {
  cursor: pointer;
  color: var(--heading-text);
  font-weight: bold;
}

.table-of-contents ol {
  list-style: none;
  margin: 0.75rem 0 0;
  padding: 0;
}

.table-of-contents li + li {
  margin-top: 0.45rem;
}

.table-of-contents a {
  color: var(--secondary-text);
}

.table-of-contents a:hover {
  color: var(--accent-hover);
}

@media (min-width: 1200px) {
  .table-of-contents {
    position: fixed;
    top: 8.25rem;
    left: calc((100vw - var(--container-width)) / 2 + var(--article-width) + 45px);
    width: 260px;
    margin: 0;
    padding: 0 0 0 1rem;
    border-top: 0;
    border-right: 0;
    border-bottom: 0;
    border-left: 1px solid var(--border-color);
  }
}

/* Tags & Meta */
.post-meta {
  color: var(--secondary-text);
  font-family: 'CMSS', 'CMS', Helvetica, Arial, sans-serif;
  font-size: 120%;
  font-style: italic;
  margin-bottom: 2rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  text-align: left;
}

.tags {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.tag {
  background: var(--code-bg);
  padding: 0.2rem 0.6rem;
  border-radius: 12px;
  font-size: 0.85em;
  border: 1px solid var(--border-color);
}

/* Header & Nav */
.site-header {
  box-sizing: border-box;
  max-width: var(--article-width);
  min-height: 50px;
  margin: 0;
  padding: 0;
  border-bottom: 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: 'CMS', 'Droid Sans', Helvetica, Arial, sans-serif;
  font-size: 20px;
  line-height: 50px;
}

.site-title {
  font-size: 20px;
  font-weight: normal;
  color: #333333;
  text-decoration: none;
}

.site-nav a {
  margin-left: 1rem;
  color: #333333;
}

.site-nav a:hover {
  color: #333333;
}

/* Animations */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.post-content > * {
  opacity: 0; /* start hidden */
}

@media (prefers-reduced-motion: reduce) {
  .post-content > * {
    animation: none !important;
    opacity: 1 !important;
    transform: none !important;
  }
}