/* Blog styles: warm monochrome/amber theme tokens matching portfolio */
:root {
  --ground: #f4f3ee;
  --panel: #ecebe3;
  --fg: #191813;
  --muted: #6e6c63;
  --line: rgba(25, 24, 19, 0.15);
  --accent: #8f5d00;
  --accent-line: rgba(143, 93, 0, 0.4);
  --on-accent: #f4f3ee;
}

html.dark {
  --ground: #060606;
  --panel: #0f0f0f;
  --fg: #e9e9e6;
  --muted: #8e8e88;
  --line: rgba(233, 233, 230, 0.13);
  --accent: #ffb000;
  --accent-line: rgba(255, 176, 0, 0.5);
  --on-accent: #060606;
}

* {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background-color: var(--ground);
  color: var(--fg);
  font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  line-height: 1.7;
  font-feature-settings: 'tnum' on;
  transition: background-color 0.3s ease, color 0.3s ease;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

::selection {
  background: var(--accent);
  color: var(--on-accent);
}

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color 0.2s ease;
}

/* Site Header */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 50;
  background: color-mix(in srgb, var(--ground) 90%, transparent);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
  transition: background-color 0.3s ease, border-color 0.3s ease;
}

.header-inner {
  max-width: 80rem;
  margin: 0 auto;
  padding: 0 1.5rem;
  height: 5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

@media (min-width: 768px) {
  .header-inner {
    padding: 0 3rem;
  }
}

.brand {
  font-size: 1.25rem;
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: -0.04em;
  white-space: nowrap;
}

.brand .dim {
  opacity: 0.4;
  font-weight: 300;
}

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

@media (min-width: 768px) {
  .nav-links {
    gap: 2rem;
  }
}

.nav-links a {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.6875rem;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--muted);
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--fg);
}

.nav-links a.active {
  color: var(--accent);
}

.header-actions {
  display: flex;
  align-items: center;
}

.theme-toggle-btn {
  background: transparent;
  border: 1px solid var(--line);
  border-radius: 3px;
  color: var(--fg);
  padding: 0.45rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: border-color 0.2s ease, background-color 0.2s ease;
}

.theme-toggle-btn:hover {
  border-color: var(--fg);
}

.sun-icon { display: none; }
.moon-icon { display: block; }
html.dark .sun-icon { display: block; }
html.dark .moon-icon { display: none; }

/* Page Container */
.page-container {
  flex: 1;
  width: 100%;
  max-width: 48rem;
  margin: 0 auto;
  padding: 8rem 1.5rem 4rem;
}

@media (min-width: 768px) {
  .page-container {
    padding: 9.5rem 2rem 5rem;
  }
}

/* Blog Index */
.blog-index-header {
  margin-bottom: 3.5rem;
}

.section-label {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.6875rem;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 600;
  margin: 0 0 0.5rem;
}

.page-title {
  font-size: 2.25rem;
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: -0.03em;
  margin: 0 0 1rem;
  line-height: 1.15;
}

@media (min-width: 768px) {
  .page-title {
    font-size: 2.75rem;
  }
}

.page-subtitle {
  font-size: 1.125rem;
  line-height: 1.6;
  font-weight: 300;
  color: var(--muted);
  margin: 0;
}

.posts-list {
  display: flex;
  flex-direction: column;
}

.post-card {
  padding: 2.5rem 0;
  border-top: 1px solid var(--line);
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.post-card-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.6875rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--muted);
}

.tags {
  display: inline-flex;
  flex-wrap: wrap;
  gap: 0.35rem;
}

.tag {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 2px;
  padding: 0.15rem 0.5rem;
  font-size: 0.625rem;
  letter-spacing: 0.1em;
  color: var(--muted);
}

.post-card-title {
  margin: 0;
  font-size: 1.35rem;
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: -0.01em;
}

.post-card-title a:hover {
  color: var(--accent);
}

.post-card-desc {
  margin: 0;
  font-size: 0.9375rem;
  color: var(--muted);
  line-height: 1.6;
}

.no-posts {
  padding: 2rem 0;
  border-top: 1px solid var(--line);
  color: var(--muted);
}

/* Post Article */
.post-article {
  display: flex;
  flex-direction: column;
}

.post-header {
  margin-bottom: 3rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid var(--line);
}

.post-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.65rem;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.6875rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 1.25rem;
}

.meta-separator {
  opacity: 0.5;
}

.back-link {
  color: var(--accent);
  font-weight: 600;
}

.back-link:hover {
  text-decoration: underline;
}

.post-title {
  font-size: 2.25rem;
  font-weight: 900;
  letter-spacing: -0.03em;
  line-height: 1.15;
  margin: 0 0 1.25rem;
}

@media (min-width: 768px) {
  .post-title {
    font-size: 2.75rem;
  }
}

.post-lead {
  font-size: 1.125rem;
  line-height: 1.6;
  font-weight: 300;
  color: var(--muted);
  margin: 0;
}

/* Markdown Content Styling */
.markdown-body {
  font-size: 1rem;
  line-height: 1.8;
  color: var(--fg);
}

.markdown-body > *:first-child {
  margin-top: 0;
}

.markdown-body h1,
.markdown-body h2,
.markdown-body h3,
.markdown-body h4 {
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--fg);
  margin: 2.5rem 0 1rem;
  line-height: 1.25;
}

.markdown-body h1 { font-size: 1.875rem; }
.markdown-body h2 {
  font-size: 1.45rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--line);
}
.markdown-body h3 { font-size: 1.2rem; }
.markdown-body h4 { font-size: 1.05rem; }

.markdown-body p {
  margin: 0 0 1.5rem;
}

.markdown-body a {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.markdown-body a:hover {
  opacity: 0.8;
}

.markdown-body ul,
.markdown-body ol {
  margin: 0 0 1.5rem;
  padding-left: 1.5rem;
}

.markdown-body li {
  margin: 0.4rem 0;
}

.markdown-body blockquote {
  margin: 1.75rem 0;
  padding: 0.75rem 1.25rem;
  border-left: 3px solid var(--accent);
  background: var(--panel);
  border-radius: 0 4px 4px 0;
  color: var(--muted);
  font-style: italic;
}

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

.markdown-body pre {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.84rem;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 1.25rem;
  overflow-x: auto;
  margin: 1.75rem 0;
  line-height: 1.55;
}

.markdown-body code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.85em;
  background: var(--panel);
  border: 1px solid var(--line);
  padding: 0.15em 0.4em;
  border-radius: 3px;
}

.markdown-body pre code {
  background: transparent;
  border: none;
  padding: 0;
  font-size: inherit;
  display: block;
}

/* Syntax Highlighting (highlight.js) */
.hljs {
  color: var(--fg);
}

.hljs-keyword,
.hljs-selector-tag,
.hljs-subst {
  color: #c2410c;
  font-weight: 600;
}

.hljs-string,
.hljs-addition {
  color: #15803d;
}

.hljs-title,
.hljs-section,
.hljs-type {
  color: #7e22ce;
  font-weight: 600;
}

.hljs-comment,
.hljs-quote,
.hljs-meta {
  color: var(--muted);
  font-style: italic;
}

.hljs-number,
.hljs-literal,
.hljs-regexp,
.hljs-link {
  color: #b45309;
}

.hljs-variable,
.hljs-params,
.hljs-attr {
  color: #0f766e;
}

.hljs-built_in,
.hljs-name {
  color: #0369a1;
}

/* Dark Mode Syntax Coloring */
html.dark .hljs {
  color: var(--fg);
}

html.dark .hljs-keyword,
html.dark .hljs-selector-tag,
html.dark .hljs-subst {
  color: #ffb000;
  font-weight: 600;
}

html.dark .hljs-string,
html.dark .hljs-addition {
  color: #86efac;
}

html.dark .hljs-title,
html.dark .hljs-section,
html.dark .hljs-type {
  color: #c084fc;
  font-weight: 600;
}

html.dark .hljs-comment,
html.dark .hljs-quote,
html.dark .hljs-meta {
  color: #8e8e88;
  font-style: italic;
}

html.dark .hljs-number,
html.dark .hljs-literal,
html.dark .hljs-regexp,
html.dark .hljs-link {
  color: #fb923c;
}

html.dark .hljs-variable,
html.dark .hljs-params,
html.dark .hljs-attr {
  color: #5eead4;
}

html.dark .hljs-built_in,
html.dark .hljs-name {
  color: #38bdf8;
}

.markdown-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 2rem 0;
  font-size: 0.9rem;
}

.markdown-body th,
.markdown-body td {
  padding: 0.75rem 1rem;
  border: 1px solid var(--line);
  text-align: left;
}

.markdown-body th {
  background: var(--panel);
  font-weight: 600;
}

.markdown-body img {
  max-width: 100%;
  height: auto;
  border-radius: 6px;
  border: 1px solid var(--line);
  margin: 1.5rem 0;
  display: block;
}

.markdown-body figure {
  margin: 2rem 0;
  text-align: center;
}

.markdown-body figure img {
  margin: 0 auto;
}

.markdown-body figcaption {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.75rem;
  letter-spacing: 0.05em;
  color: var(--muted);
  margin-top: 0.75rem;
}

.markdown-body hr {
  border: none;
  border-top: 1px solid var(--line);
  margin: 3rem 0;
}

/* Post Footer */
.post-footer {
  margin-top: 4rem;
  padding-top: 2rem;
  border-top: 1px solid var(--line);
}

.post-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.75rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

.rss-link {
  color: var(--muted);
}

.rss-link:hover {
  color: var(--fg);
}

/* Site Footer */
.site-footer {
  border-top: 1px solid var(--line);
  padding: 2.5rem 1.5rem;
  margin-top: auto;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.625rem;
  text-transform: uppercase;
  letter-spacing: 0.25em;
  color: var(--muted);
}

.footer-inner {
  max-width: 80rem;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.5rem;
}

@media (min-width: 768px) {
  .footer-inner {
    flex-direction: row;
    justify-content: space-between;
  }
}

.footer-inner p {
  margin: 0;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1.25rem 1.75rem;
}

.footer-links a:hover {
  color: var(--fg);
}