:root {
  --color-text: #1a1a1a;
  --color-muted: #666;
  --color-bg: #fff;
  --color-link: #048b9a;
  --color-border: #e5e5e5;
  --max-width: 42rem;
  --max-width-wide: 72rem;

  --color-primary: #048b9a;
  --color-primary-dark: #036270;
  --color-primary-tint: #e3f2f4;
  --color-primary-contrast: #ffffff;

  --card-bg: #fff;
  --card-border: #e5e5e5;
  --card-shadow: 0 1px 2px rgba(16, 24, 40, 0.06), 0 1px 3px rgba(16, 24, 40, 0.08);
  --card-shadow-hover: 0 4px 10px rgba(16, 24, 40, 0.08), 0 8px 20px rgba(16, 24, 40, 0.1);

  --chip-bg: #eef2f5;
  --chip-fg: #445;
  --chip-active-bg: var(--color-primary);
  --chip-active-fg: #fff;

  --code-bg: #f6f8fa;
  --code-fg: #24292f;
  --code-border: #d0d7de;
  --code-toolbar-bg: #eaeef2;
  --code-muted: #57606a;

  --syn-keyword: #cf222e;
  --syn-entity: #953800;
  --syn-tag: #116329;
  --syn-insert-bg: #dafbe1;
  --syn-constant: #0550ae;
  --syn-string: #0a3069;
  --syn-function: #8250df;
  --syn-comment: #6e7781;
  --syn-delete-fg: #82071e;
  --syn-delete-bg: #ffebe9;
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-text: #e6e6e6;
    --color-muted: #999;
    --color-bg: #14161a;
    --color-link: #4fc3d1;
    --color-border: #2a2d34;

    --color-primary: #1c93a1;
    --color-primary-dark: #0f6672;
    --color-primary-tint: #12292c;
    --color-primary-contrast: #ffffff;

    --card-bg: #1b1e24;
    --card-border: #2a2d34;
    --card-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
    --card-shadow-hover: 0 6px 16px rgba(0, 0, 0, 0.4);

    --chip-bg: #262a31;
    --chip-fg: #ccc;
    --chip-active-bg: var(--color-primary);
    --chip-active-fg: #fff;

    --code-bg: #161b22;
    --code-fg: #c9d1d9;
    --code-border: #30363d;
    --code-toolbar-bg: #21262d;
    --code-muted: #8b949e;

    --syn-keyword: #ff7b72;
    --syn-entity: #ffa657;
    --syn-tag: #7ee787;
    --syn-insert-bg: #033a16;
    --syn-constant: #79c0ff;
    --syn-string: #a5d6ff;
    --syn-function: #d2a8ff;
    --syn-comment: #8b949e;
    --syn-delete-fg: #ffdcd7;
    --syn-delete-bg: #67060c;
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  font-size: 1.05rem;
  line-height: 1.65;
  color: var(--color-text);
  background: var(--color-bg);
}

.site-content,
.site-footer {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 1.5rem 1.25rem;
}

body.page-home .site-content {
  max-width: var(--max-width-wide);
}

.site-header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 1.5rem 1.25rem;
}

.site-header {
  border-bottom: 1px solid var(--color-border);
}

.site-title {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--color-text);
  text-decoration: none;
}

.site-description {
  margin: 0.25rem 0 0;
  color: var(--color-muted);
  font-size: 0.95rem;
}

/* Hero header, homepage only */
body.page-home .site-header {
  background: linear-gradient(160deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  border-bottom: none;
}

body.page-home .site-header-inner {
  max-width: var(--max-width-wide);
  padding: 3.5rem 1.25rem 3rem;
  text-align: center;
}

body.page-home .site-title {
  color: var(--color-primary-contrast);
  font-size: 2.1rem;
}

body.page-home .site-description {
  color: rgba(255, 255, 255, 0.88);
  font-size: 1.1rem;
  margin-top: 0.6rem;
}

.site-footer {
  border-top: 1px solid var(--color-border);
  color: var(--color-muted);
  font-size: 0.9rem;
}

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

/* Filter bar */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem;
  margin: -1rem 0 2rem;
}

.filter-search {
  flex: 1 1 16rem;
  font: inherit;
  font-size: 0.95rem;
  color: var(--color-text);
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 8px;
  padding: 0.55rem 0.9rem;
}

.filter-search:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 1px;
}

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

.filter-tag {
  font: inherit;
  font-size: 0.85rem;
  color: var(--chip-fg);
  background: var(--chip-bg);
  border: 1px solid transparent;
  border-radius: 999px;
  padding: 0.3rem 0.85rem;
  cursor: pointer;
}

.filter-tag:hover {
  border-color: var(--color-primary);
}

.filter-tag.is-active {
  background: var(--chip-active-bg);
  color: var(--chip-active-fg);
}

.filter-empty {
  display: none;
  color: var(--color-muted);
  padding: 2rem 0;
  text-align: center;
}

.filter-empty.is-visible {
  display: block;
}

/* Post card grid */
.post-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(17rem, 1fr));
  gap: 1.25rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.post-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 12px;
  box-shadow: var(--card-shadow);
  padding: 1.25rem 1.4rem 1.4rem;
  display: flex;
  flex-direction: column;
  transition: box-shadow 0.15s ease, transform 0.15s ease;
}

.post-card:hover {
  box-shadow: var(--card-shadow-hover);
  transform: translateY(-2px);
}

.post-card.is-hidden {
  display: none;
}

.post-card-date {
  color: var(--color-muted);
  font-size: 0.85rem;
  font-variant-numeric: tabular-nums;
}

.post-card-title {
  margin: 0.5rem 0 0.5rem;
  font-size: 1.2rem;
  line-height: 1.35;
}

.post-card-title a {
  color: var(--color-text);
  text-decoration: none;
}

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

.post-card-excerpt {
  color: var(--color-muted);
  font-size: 0.92rem;
  margin: 0 0 1rem;
  flex-grow: 1;
}

.post-card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.post-card-tags .tag-chip {
  font-size: 0.78rem;
  color: var(--chip-fg);
  background: var(--chip-bg);
  border-radius: 999px;
  padding: 0.2rem 0.65rem;
  text-decoration: none;
}

.post-card-tags .tag-chip:hover {
  background: var(--color-primary-tint);
  color: var(--color-primary-dark);
}

/* Tags on the post page itself */
.post-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin: 0.75rem 0 0;
}

.post-tags .tag-chip {
  font-size: 0.8rem;
  color: var(--color-primary-dark);
  background: var(--color-primary-tint);
  border-radius: 999px;
  padding: 0.25rem 0.7rem;
  text-decoration: none;
}

.post-tags .tag-chip:hover {
  background: var(--color-primary);
  color: #fff;
}

.back-link {
  display: inline-block;
  margin-bottom: 1rem;
  font-size: 0.9rem;
  color: var(--color-muted);
  text-decoration: none;
}

.back-link:hover {
  color: var(--color-primary);
}

.post-title {
  margin-bottom: 0.25rem;
}

.post-meta {
  color: var(--color-muted);
  font-size: 0.9rem;
  margin-top: 0;
}

.post-content code {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.9em;
}

.post-content code.highlighter-rouge {
  background: var(--code-toolbar-bg);
  border-radius: 4px;
  padding: 0.15em 0.4em;
}

.post-content div.highlighter-rouge {
  margin: 1.5rem 0;
  border: 1px solid var(--code-border);
  border-radius: 8px;
  overflow: hidden;
}

.post-content div.highlighter-rouge .highlight,
.post-content div.highlighter-rouge pre.highlight {
  margin: 0;
}

.post-content div.highlighter-rouge pre.highlight {
  overflow-x: auto;
  padding: 1rem;
  line-height: 1.6;
}

.code-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 0.4rem 0.75rem;
  background: var(--code-toolbar-bg);
  border-bottom: 1px solid var(--code-border);
  font-size: 0.8rem;
}

.code-lang {
  color: var(--code-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.code-copy {
  font: inherit;
  font-size: 0.8rem;
  color: var(--code-muted);
  background: none;
  border: 1px solid var(--code-border);
  border-radius: 4px;
  padding: 0.15rem 0.6rem;
  cursor: pointer;
}

.code-copy:hover {
  color: var(--color-text);
  border-color: var(--code-muted);
}

.code-copy:focus-visible {
  outline: 2px solid var(--color-link);
  outline-offset: 2px;
}

.post-figure {
  margin: 1.5rem 0;
}

.post-figure img {
  max-width: 100%;
  height: auto;
  display: block;
}

.post-figure figcaption {
  color: var(--color-muted);
  font-size: 0.85rem;
  text-align: center;
  margin-top: 0.4rem;
}

.post-figure--center {
  text-align: center;
}

.post-figure--full img {
  width: 100%;
}

.post-figure--left {
  float: left;
  max-width: 45%;
  margin-right: 1.5rem;
}

.post-figure--right {
  float: right;
  max-width: 45%;
  margin-left: 1.5rem;
}