/* Base Variables */
:root {
  --paper-color: #f8f7f3;
  --ink-color: #333333;
  --accent-primary: #1e5f74;
  --accent-secondary: #4a6670;
  --highlight: #ffcc5c;
  --code-bg: #f0f0f0;
  --formula-bg: #f3f4f6;
  --grid-color: rgba(30, 95, 116, 0.05);
  --container-width: 800px;
  --font-body: 'Charter', 'Palatino', serif;
  --font-heading: 'IBM Plex Sans', 'Helvetica Neue', sans-serif;
  --font-code: 'IBM Plex Mono', 'Consolas', monospace;
}

/* Base Styles */
html {
  font-size: 18px;
  line-height: 1.6;
}

body {
  background-color: var(--paper-color);
  background-image: linear-gradient(var(--grid-color) 1px, transparent 1px),
                    linear-gradient(90deg, var(--grid-color) 1px, transparent 1px);
  background-size: 20px 20px;
  color: var(--ink-color);
  font-family: var(--font-body);
  margin: 0;
  padding: 0;
}

/* Layout */
.container {
  display: grid;
  grid-template-columns: 1fr min(var(--container-width), 90%) 1fr;
  padding: 2rem 0;
}

.container > * {
  grid-column: 2;
}

/* Header */
header {
  margin-bottom: 3rem;
  border-bottom: 1px solid var(--accent-secondary);
}

.site-title {
  font-family: var(--font-heading);
  font-size: 1.8rem;
  font-weight: 700;
  margin: 0;
  letter-spacing: -0.5px;
  color: var(--accent-primary);
}
.site-title a {
  text-decoration: none;
}

.site-description {
  font-style: italic;
  color: var(--accent-secondary);
}

/* Navigation */
nav {
  font-family: var(--font-heading);
  margin: 1rem 0;
}

nav ul {
  display: flex;
  list-style: none;
  padding: 0;
  margin: 0;
  gap: 1.5rem;
}

nav a {
  color: var(--accent-secondary);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.2s;
}

nav a:hover {
  color: var(--accent-primary);
  text-decoration: underline;
}

.post {
  margin-bottom: 0.5rem;
}
.post a {
  text-decoration: none;
  font-weight: bold;
  display: inline-block;
}
.post a:hover {
  color: var(--accent-primary);
  text-decoration: underline;
}
.post .article-tag {
  font-size: 0.7rem;
  margin-right: 0;
}

.series h2 {
  margin: 1.5rem 0 0.5rem;
}
.series .post {
  margin-bottom: 0.1rem;
  margin-left: 1rem;
}

/* Typography */
h1 {
  margin: 2rem 0;
}
h2 {
  margin: 1.5rem 0 1rem;
}
h1, h2, h3 {
  font-family: var(--font-heading);
  line-height: 1.25;
  color: var(--accent-primary);
}

h1 {
  font-size: 2rem;
  margin-top: 0;
  position: relative;
}

h1::after {
  content: "";
  display: block;
  width: 60px;
  height: 3px;
  background-color: var(--highlight);
  margin-top: 0.5rem;
}

h2 {
  font-size: 1.75rem;
}

h3 {
  font-size: 1.4rem;
}

p {
  margin: 0 0 1.5rem;
}

a {
  color: var(--accent-primary);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 2px;
}

a:hover {
  color: var(--accent-secondary);
}

blockquote {
  border-left: 4px solid var(--highlight);
  margin: 1.5rem 0;
  padding: 0.5rem 0 0.5rem 1.5rem;
  font-style: italic;
  color: var(--accent-secondary);
}

blockquote p:last-child {
  margin-bottom: 0;
}

hr {
  border: 0;
  height: 1px;
  background-color: var(--accent-secondary);
  opacity: 0.2;
  margin: 2rem 0;
}

/* Code and Formula Blocks */
pre, code {
  font-family: var(--font-code);
  font-size: 0.9rem;
}

h1 code {
  background-color: var(--code-bg);
  padding: 0.2rem 0.4rem;
  border-radius: 3px;
  font-size: 1.5rem;
}
h2 code {
  font-size: 1.5rem;
}

code {
  background-color: var(--code-bg);
  padding: 0.2rem 0.4rem;
  border-radius: 3px;
}

pre {
  background-color: var(--code-bg);
  padding: 1rem;
  overflow-x: auto;
  border-left: 3px solid var(--accent-primary);
  margin-bottom: 1.5rem;
  border-radius: 4px;
}
.code-and-result pre {
  margin-bottom: 0;
  border-radius: 0;
}
.code-and-result pre:first-child {
  border-top-left-radius: 4px;
  border-top-right-radius: 4px;
}
.code-and-result pre:last-child {
  margin-bottom: 1.5rem;
  border-bottom-left-radius: 4px;
  border-bottom-right-radius: 4px;
}
.code-and-result pre + pre {
  border-top: 1px solid var(--accent-secondary);
  margin-top: 0;
}

pre code {
  background-color: transparent;
  padding: 0;
}

.formula {
  padding: 1rem;
  margin: 1.5rem 0;
  border-radius: 4px;
  overflow-x: auto;
  text-align: center;
  font-family: var(--font-code);
}

.formula path {
  stroke-width: 0;
}

.recent-posts {
  margin: 3rem 0 5rem;
}

/* Images */
img {
  max-width: 100%;
  height: auto;
  border-radius: 4px;
}

figure {
  margin: 0 0 1.5rem 0;
}

figcaption {
  font-size: 0.9rem;
  color: var(--accent-secondary);
  text-align: center;
}

/* Article Elements */
.article-meta {
  color: var(--accent-secondary);
  font-size: 0.9rem;
  font-style: italic;
  text-align: right;
}

.contact {
  margin-bottom: 2rem;
  color: var(--accent-secondary);
  font-size: 0.9rem;
  font-style: italic;
}

.article-tag {
  display: inline-block;
  padding: 0.2rem 0.5rem;
  background-color: var(--accent-primary);
  color: white;
  font-size: 0.8rem;
  border-radius: 3px;
  margin-right: 0.5rem;
  letter-spacing: 0.5px;
  font-family: var(--font-heading);
}

.article-date {
  margin-left: 0.5rem;
}

/* Footer */
footer {
  margin-top: 2rem;
  padding-top: 1rem;
  border-top: 1px solid var(--accent-secondary);
  font-size: 0.9rem;
  color: var(--accent-secondary);
}

/* Responsive Adjustments */
@media (max-width: 768px) {
  html {
    font-size: 16px;
  }

  .container {
    grid-template-columns: 1fr min(95%, var(--container-width)) 1fr;
    padding: 1rem 0;
  }

  nav ul {
    flex-direction: column;
    gap: 0.5rem;
  }
}

/* Print Styles */
@media print {
  body {
    background: none;
    color: black;
  }

  .container {
    display: block;
    max-width: 100%;
  }

  a {
    color: black;
    text-decoration: none;
  }

  a[href]::after {
    content: " (" attr(href) ")";
    font-size: 0.8em;
  }
}

/* Diagram and visualization containers */
.diagram-container, .visualization-container {
  margin: 2rem 0;
  text-align: center;
}

/* Table Styles */
table {
  width: auto;
  margin: 2rem auto;
  border-collapse: collapse;
  font-size: 0.9rem;
  line-height: 1.4;
}
table.small th, table.small td {
  padding: 0.25rem 0.25rem;
}
table.text-center th, table.text-center td {
  text-align: center;
}

thead {
  background-color: var(--accent-primary);
  color: white;
}

th {
  text-align: left;
  padding: 0.75rem 1rem;
  font-family: var(--font-heading);
  font-weight: 600;
}

td {
  padding: 0.5rem 1rem;
  border-bottom: 1px solid var(--code-bg);
}

tbody tr:nth-child(even) {
  background-color: var(--formula-bg);
}
tbody tr.no-bg:nth-child(even) {
  background-color: transparent;
}

/* Footnotes */
.footnotes {
  margin-top: 3rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--accent-secondary);
  font-size: 0.9rem;
}

.footnote-ref {
  font-size: 0.75em;
  vertical-align: super;
  line-height: 0;
  color: var(--accent-primary);
}

/* Utility Classes */
.text-center {
  text-align: center;
}

.hidden {
  display: none;
}

/* Syntax highlighting */
.hl-comment{color:#839496}
.hl-tag{color:#657b83}
.hl-operator,.hl-punctuation,.hl-subst{color:#586e75}
.hl-operator{opacity:.7}
.hl-bullet,.hl-deletion,.hl-name,.hl-selector-tag,.hl-template-variable,.hl-variable{color:#dc322f}
.hl-attr,.hl-link,.hl-literal,.hl-number,.hl-symbol,.hl-variable.constant_{color:#cb4b16}
.hl-class .hl-title,.hl-title,.hl-title.class_{color:#b58900}
.hl-strong{font-weight:700;color:#b58900}
.hl-addition,.hl-code,.hl-string,.hl-title.class_.inherited__,.hl-regex{color:#859900}
.hl-built_in,.hl-doctag,.hl-keyword.hl-atrule,.hl-quote{color:#2aa198}
.hl-attribute,.hl-function .hl-title,.hl-section,.hl-title.function_,.ruby .hl-property{color:#268bd2}
.diff .hl-meta,.hl-keyword,.hl-template-tag,.hl-type{color:#6c71c4}
.hl-emphasis{color:#6c71c4;font-style:italic}
.hl-meta,.hl-meta .hl-keyword,.hl-meta .hl-string{color:#d33682}
.hl-meta .hl-keyword,.hl-meta-keyword{font-weight:700}

/* SVG */
svg {
  border-radius: 4px;
}

svg text {
  font-family: 'IBM Plex Sans', 'Helvetica Neue', sans-serif;
}

svg circle.ink, svg line.ink, svg path.ink {
  stroke: var(--ink-color);
}
svg text.accent {
  fill: var(--ink-color);
}

svg circle.accent, svg line.accent, svg path.accent {
  stroke: var(--accent-primary);
}
svg text.accent {
  fill: var(--accent-primary);
}

svg circle.gray, svg link.gray, svg path.gray {
  stroke: var(--accent-secondary);
}
svg text.gray {
  fill: var(--accent-secondary);
}

/* Figures */
.figure-large > * {
  width: 100%;
}
.figure-medium {
  display: grid;
  grid-template-columns: 1fr minmax(auto, calc(0.6 * var(--container-width))) 1fr;
}
.figure-small {
  display: grid;
  grid-template-columns: 1fr minmax(auto, calc(0.4 * var(--container-width))) 1fr;
}

.figure-medium > *, .figure-small > * {
  grid-column: 2;
}
.figure-medium > svg, .figure-small > svg {
  width: 100%;
  height: auto;
}

view-3d::part(background) {
  display: none;
}