/* === RESET === */
*,
*::before,
*::after {
  box-sizing: border-box;
}

* {
  margin: 0;
}

body {
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -webkit-text-size-adjust: none;
  text-size-adjust: none;
}

img, picture, video, canvas, svg {
  display: block;
  max-width: 100%;
}

input, button, textarea, select {
  font: inherit;
}

p, h1, h2, h3, h4, h5, h6 {
  overflow-wrap: break-word;
}

p {
  text-wrap: pretty;
}

h1, h2, h3, h4, h5, h6 {
  text-wrap: balance;
}

/* === VARIABLES === */
:root {
  --color-bg: #ffffff;
  --color-text: #1a1a1a;
  --color-text-muted: #555555;
  --color-accent: #0066cc;
  --color-accent-hover: #004999;
  --color-border: #e0e0e0;
  --code-inline-bg: #f5f5f5;
  --code-inline-color: #c7254e;
  --font-body: system-ui, -apple-system, sans-serif;
  --font-mono: ui-monospace, Menlo, Consolas, monospace;
  --content-width: 42rem;
  --content-padding: 1.5rem;
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-bg: #121212;
    --color-text: #e0e0e0;
    --color-text-muted: #999999;
    --color-accent: #6db3f2;
    --color-accent-hover: #8cc4ff;
    --color-border: #333333;
    --code-inline-bg: #2a2a2a;
    --code-inline-color: #f08d8d;
  }
}

/* === BASE === */
html {
  color-scheme: light dark;
  interpolate-size: allow-keywords;
}

body {
  font-family: var(--font-body);
  font-size: 1.125rem;
  color: var(--color-text);
  background: var(--color-bg);
}

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

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

/* === LAYOUT === */
.container {
  max-width: var(--content-width);
  margin-inline: auto;
  padding-inline: var(--content-padding);
}

/* === HEADER === */
.site-header {
  border-bottom: 1px solid var(--color-border);
  padding: 1rem 0;
  margin-bottom: 2rem;
}

.site-header nav {
  max-width: var(--content-width);
  margin-inline: auto;
  padding-inline: var(--content-padding);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.site-name {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-text);
}

.site-name:hover {
  color: var(--color-accent);
  text-decoration: none;
}

.nav-links {
  display: flex;
  gap: 1.5rem;
}

/* === FOOTER === */
.site-footer {
  border-top: 1px solid var(--color-border);
  padding: 2rem 0;
  margin-top: 3rem;
  color: var(--color-text-muted);
  font-size: 0.875rem;
}

/* === COVER PHOTO === */
.cover-photo {
  width: 100%;
  border-radius: 0.5rem;
  margin-top: 1rem;
  margin-bottom: 1rem;
}

/* === POST LIST (HOME) === */
.post-list {
  display: flex;
  flex-direction: column;
  gap: 2.5rem;
}

.post-card h2 {
  font-size: 1.5rem;
  margin-bottom: 0.25rem;
}

.post-card time {
  display: block;
  color: var(--color-text-muted);
  font-size: 0.875rem;
  margin-bottom: 0.5rem;
}

.post-card p {
  color: var(--color-text-muted);
  margin-bottom: 0.5rem;
}

.read-more {
  font-size: 0.875rem;
  font-weight: 600;
}

/* === PAGINATION === */
.pagination {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 3rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--color-border);
  font-size: 0.875rem;
}

/* === POST === */
.post-header {
  margin-bottom: 2rem;
}

.post-header h1 {
  font-size: 2rem;
  line-height: 1.2;
  margin-bottom: 0.5rem;
}

.post-header time {
  display: block;
  color: var(--color-text-muted);
  font-size: 0.875rem;
}

.post-content h1,
.post-content h2,
.post-content h3,
.post-content h4 {
  margin-top: 2rem;
  margin-bottom: 0.75rem;
}

.post-content p,
.post-content ul,
.post-content ol,
.post-content blockquote,
.post-content pre,
.post-content table,
.post-content div,
.post-content iframe {
  margin-bottom: 1.25rem;
}

.post-content ul,
.post-content ol {
  padding-left: 1.5rem;
}

.post-content li {
  margin-bottom: 0.25rem;
}

.post-content blockquote {
  border-left: 3px solid var(--color-accent);
  padding-left: 1rem;
  color: var(--color-text-muted);
}

.post-content img {
  border-radius: 0.25rem;
  margin-inline: auto;
}

.post-content iframe {
  max-width: 100%;
}

.post-footer {
  margin-top: 3rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--color-border);
}

/* === CODE === */
:not(pre) > code {
  background: var(--code-inline-bg);
  color: var(--code-inline-color);
  padding: 0.125rem 0.3rem;
  border-radius: 0.25rem;
  font-size: 0.9em;
  font-family: var(--font-mono);
}

pre {
  padding: 1.25rem 1.5rem;
  border-radius: 0.5rem;
  overflow-x: auto;
  font-size: 0.875rem;
  line-height: 1.6;
  tab-size: 2;
  font-family: var(--font-mono);
}

pre code {
  background: none;
  padding: 0;
  border-radius: 0;
  color: inherit;
  font-size: inherit;
}

/* === JULIA SYNTAX HIGHLIGHTING (pre-rendered HTML) === */
.hljl {
  background: #282c34;
  color: #abb2bf;
  padding: 1.25rem 1.5rem;
  border-radius: 0.5rem;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 0.875rem;
  line-height: 1.6;
  margin-bottom: 1.25rem;
}

.hljl-t { color: #abb2bf; }
.hljl-n { color: #e06c75; }
.hljl-nf { color: #61afef; }
.hljl-ni { color: #e06c75; }
.hljl-oB { color: #56b6c2; }
.hljl-p { color: #abb2bf; }
.hljl-cs { color: #5c6370; font-style: italic; }
.hljl-s { color: #98c379; }
.hljl-sb { color: #98c379; }
.hljl-k { color: #c678dd; }
.hljl-nB { color: #d19a66; }

/* === MATHJAX === */
mjx-container {
  overflow-x: auto;
  overflow-y: hidden;
}