@font-face {
  font-family: 'Fira Code';
  src: url('../fonts/FiraCode-Regular.woff2') format('woff2');
  font-weight: 400;
}

@font-face {
  font-family: 'Inter';
  src: url('../fonts/Inter-Regular.woff2') format('woff2');
  font-weight: 400;
}

:root {
  /* Palette definitions */
  --background-color: #141a17;
  --body-text-color: #d8e2dc;
  --heading-color: #e0af68;
  --link-color: #5eead4;
  --link-hover-color: #7df2e1;
  --tag-highlight-color: #fb923c;
  --tag-highlight-bg: rgba(251, 146, 60, 0.15);
  --tag-highlight-border: rgba(251, 146, 60, 0.15);
  --border-color: #242c27;
  --card-background: #1f2c25;
  --card-border-color: #314237;
  --card-border-hover: var(--heading-color);
  --code-background: #1a221e;
  --post-date-color: #8fa097;

  /* Pico.css custom properties mapping */
  --pico-font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --pico-font-family-monospace: 'Fira Code', monospace;
  --pico-background-color: var(--background-color);
  --pico-color: var(--body-text-color);
  --pico-h1-color: var(--heading-color);
  --pico-h2-color: var(--heading-color);
  --pico-h3-color: var(--heading-color);
  --pico-h4-color: var(--tag-highlight-color);
  --pico-h5-color: var(--heading-color);
  --pico-h6-color: var(--post-date-color);
  --pico-primary: var(--link-color);
  --pico-primary-hover: var(--link-hover-color);
  --pico-card-background-color: var(--card-background);
  --pico-card-border-color: var(--card-border-color);
  --pico-card-box-shadow: 0 4px 16px rgba(0, 0, 0, 0.4), 0 1px 3px rgba(0, 0, 0, 0.25);
  --pico-card-sectioning-background-color: transparent;
  --pico-border-color: var(--border-color);
  --pico-code-background-color: var(--code-background);
  --pico-code-color: var(--body-text-color);
}

/* Layout container constrained for comfortable desktop reading */
.container,
main.container,
body > nav,
body > footer {
  max-width: 48rem;
  width: 100%;
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--pico-spacing, 1rem);
  padding-right: var(--pico-spacing, 1rem);
  box-sizing: border-box;
}

body {
  font-family: var(--pico-font-family);
  background-color: var(--pico-background-color);
  color: var(--pico-color);
}

h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
}

h1 {
  color: var(--heading-color);
  font-size: 2.25rem;
  font-weight: 700;
  line-height: 1.2;
  margin-top: 1rem;
  margin-bottom: 0.75rem;
  letter-spacing: -0.02em;
}

h2 {
  color: var(--heading-color);
  font-size: 1.65rem;
  line-height: 1.3;
  margin-top: 2rem;
  margin-bottom: 0.75rem;
  padding-bottom: 0.35rem;
  border-bottom: 1px solid var(--border-color);
  letter-spacing: -0.01em;
}

h3 {
  color: var(--heading-color);
  font-size: 1.35rem;
  line-height: 1.35;
  margin-top: 1.5rem;
  margin-bottom: 0.5rem;
}

h4 {
  color: var(--tag-highlight-color);
  font-size: 1.15rem;
  line-height: 1.4;
  margin-top: 1.35rem;
  margin-bottom: 0.4rem;
}

h5 {
  color: var(--heading-color);
  font-size: 0.95rem;
  line-height: 1.4;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-top: 1.25rem;
  margin-bottom: 0.35rem;
}

h6 {
  color: var(--post-date-color);
  font-size: 0.85rem;
  line-height: 1.45;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-top: 1.15rem;
  margin-bottom: 0.35rem;
}

p {
  line-height: 1.7;
  margin-bottom: 1.25rem;
}

h1 a, h2 a, h3 a, h4 a, h5 a, h6 a {
  color: inherit;
  text-decoration: none;
  transition: color 0.2s ease;
}

h1 a:hover, h2 a:hover, h3 a:hover, h4 a:hover, h5 a:hover, h6 a:hover,
h1 a:focus, h2 a:focus, h3 a:focus, h4 a:focus, h5 a:focus, h6 a:focus {
  color: var(--link-color);
  text-decoration: underline;
}

a {
  color: var(--link-color);
}

nav {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  margin-bottom: 2rem;
  padding-top: 1rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--border-color);
}

nav a {
  margin-right: 0;
  color: var(--link-color);
  text-decoration: none;
  font-weight: 500;
  font-size: 1.05rem;
  transition: color 0.15s ease, opacity 0.15s ease;
}

nav a:hover,
nav a:focus {
  color: var(--link-hover-color);
  text-decoration: underline;
}

/* code blocks */
code {
  font-family: var(--pico-font-family-monospace);
  background: var(--code-background);
  color: var(--body-text-color);
  padding: 0.15em 0.45em;
  border-radius: 4px;
  border: 1px solid var(--border-color);
  font-size: 0.875em;
}

pre {
  background: var(--code-background);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 1rem;
  margin: 1.5rem 0;
}

pre code {
  display: block;
  padding: 0;
  border: none;
  background: transparent;
  overflow-x: auto;
  font-size: 0.9rem;
  line-height: 1.5;
}

code, pre {
  font-family: 'Fira Code', monospace;
}

/* Tag highlights */
.tag-link,
.category {
  color: var(--tag-highlight-color);
  background-color: var(--tag-highlight-bg);
  border: 1px solid var(--tag-highlight-border);
  border-radius: 9999px;
  padding: 0.15rem 0.65rem;
  font-size: 0.8rem;
  font-weight: 500;
  line-height: 1.4;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  transition: background-color 0.15s ease, border-color 0.15s ease, transform 0.15s ease;
  vertical-align: middle;
}

.tag-link a,
.category a {
  color: var(--tag-highlight-color);
  text-decoration: none;
  transition: color 0.15s ease;
}

.tag-link:hover,
.category:hover {
  background-color: rgba(251, 146, 60, 0.25);
  border-color: rgba(251, 146, 60, 0.4);
}

.tag-link a:hover,
.category a:hover,
.tag-link:hover a,
.category:hover a,
a.tag:hover,
.tag:hover {
  text-decoration: underline;
}

blockquote {
  border-left: 3px solid var(--heading-color);
  background: rgba(255, 255, 255, 0.02);
  padding: 0.75rem 1.25rem;
  margin: 1.5rem 0;
  border-radius: 0 6px 6px 0;
  color: var(--post-date-color);
  font-style: italic;
}

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

ul, ol {
  padding-left: 1.5rem;
  margin-bottom: 1.25rem;
  line-height: 1.65;
}

li {
  margin-bottom: 0.35rem;
}

hr {
  border: none;
  border-top: 1px solid var(--border-color);
  margin: 2rem 0;
}

/* Posts list on pages */
.posts-list {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.post-summary {
  margin-bottom: 1.5rem;
  background-color: var(--pico-card-background-color);
  border: 1px solid var(--pico-card-border-color);
  border-radius: 8px;
  padding: 1.5rem;
  box-shadow: var(--pico-card-box-shadow);
  transition: border-color 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;
}

.post-summary:hover,
.post-summary:focus-within {
  border-color: var(--card-border-hover);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.55), 0 2px 6px rgba(0, 0, 0, 0.35);
  transform: translateY(-2px);
}

.post-summary header {
  background-color: transparent;
  border: none;
  margin: 0 0 0.5rem 0;
  padding: 0;
}

.post-summary header h3,
.posts-list h3 {
  margin: 0;
  font-size: 1.35rem;
  line-height: 1.3;
}

.post-summary header h3 a,
.posts-list h3 a {
  color: var(--heading-color);
  text-decoration: none;
  transition: color 0.5s ease;
}

.post-summary header h3 a:hover,
.posts-list h3 a:hover {
  color: var(--link-color);
  text-decoration: underline;
}

.post-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.85rem;
}

.post-date {
  color: var(--post-date-color);
  font-size: 0.9em;
}

.reading-time {
  color: var(--post-date-color);
  font-size: 0.85em;
}

.post-excerpt {
  margin-bottom: 0.75rem;
}

.post-excerpt p {
  margin: 0;
  color: var(--body-text-color);
  line-height: 1.6;
}

.post-summary footer {
  background-color: transparent;
  border: none;
  border-top: 1px solid var(--pico-card-border-color);
  margin: 0;
  padding: 0.75rem 0 0 0;
}

.post-summary footer a {
  color: var(--link-color);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.15s ease;
}

.post-summary footer a:hover {
  text-decoration: underline;
}

/* Style the first paragraph differently. */
h1 + p {
  color: var(--post-date-color);
  font-size: 0.95rem;
  margin-bottom: 1.5rem;
}

li > strong:first-child {
  text-decoration: underline;
}

/* Featured Image container for square / hero graphics */
.featured-image {
  margin: 1.5rem auto 2rem auto;
  max-width: 360px;
  width: 100%;
  text-align: center;
}

.featured-image img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1 / 1;
  object-fit: contain;
  border-radius: 8px;
  border: 1px solid var(--pico-card-border-color);
  background-color: var(--pico-card-background-color);
  box-shadow: var(--pico-card-box-shadow);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.featured-image img:hover {
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.55), 0 2px 6px rgba(0, 0, 0, 0.35);
}

@media (max-width: 640px) {
  .featured-image {
    max-width: 280px;
    margin: 1.25rem auto 1.5rem auto;
  }
}

body > footer {
  margin-top: 3rem;
  padding-top: 1.5rem;
  padding-bottom: 2rem;
  border-top: 1px solid var(--border-color);
  color: var(--post-date-color);
  font-size: 0.85rem;
  text-align: center;
}