:root {
  --bg: #ffffff;
  --bg-overlay: rgba(255, 255, 255, 0.85);
  --glow: rgba(245, 70, 66, 0.08);
  --text: #24292f;
  --text-bold: #0969da;
  --line: #d0d7de;
  --code-bg: #f6f8fa;
  --link: #0969da;

  --md-code-hl-keyword-color: #cf222e;
  --md-code-hl-string-color: #0a3069;
  --md-code-hl-number-color: #0550ae;
  --md-code-hl-comment-color: #6e7781;
  --md-code-hl-name-color: #3b61b0;
  --md-code-fg-color: #8250df;
  --md-code-hl-variable-color: #953800;
  --md-code-hl-function-color: #8250df;
  --md-code-hl-type-color: #116329;
  --md-code-hl-constant-color: #0550ae;
  --md-code-hl-operator-color: #cf222e;
  --md-code-hl-punctuation-color: #24292f;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0d1117;
    --bg-overlay: rgba(13, 17, 23, 0.75);
    --glow: rgba(245, 70, 66, 0.10);
    --text: #c9d1d9;
    --text-bold: #58a6ff;
    --line: #30363d;
    --code-bg: #161b22;
    --link: #58a6ff;

    --md-code-hl-keyword-color: #ff7b72;
    --md-code-hl-string-color: #a5d6ff;
    --md-code-hl-number-color: #79c0ff;
    --md-code-hl-comment-color: #8b949e;
    --md-code-hl-name-color: #c5e478;
    --md-code-fg-color: #d39dd6;
    --md-code-hl-variable-color: #ffa657;
    --md-code-hl-function-color: #d2a8ff;
    --md-code-hl-type-color: #7ee787;
    --md-code-hl-constant-color: #79c0ff;
    --md-code-hl-operator-color: #ff7b72;
    --md-code-hl-punctuation-color: #c9d1d9;
  }
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  background:
    radial-gradient(ellipse at bottom, var(--glow) 0%, transparent 70%),
    linear-gradient(var(--bg-overlay), var(--bg-overlay)),
    url('../flcl.webp') center / cover no-repeat fixed var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  font-size: 1rem;
  line-height: 1.6;
  min-height: 100vh;
  padding: 48px 20px;
}

.container {
  max-width: 55rem;
  margin: 0 auto;
}

.post-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  border-bottom: 1px solid var(--line);
  padding-bottom: 16px;
  margin-bottom: 32px;
}

.nav-back {
  color: var(--link);
  text-decoration: none;
  font-weight: 600;
}

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

.post-date {
  font-size: 0.85rem;
  color: var(--text);
  opacity: 0.7;
  font-family: monospace;
}

.post-content h1 {
  font-size: 1.8rem;
  margin-bottom: 8px;
}

.post-footer {
  margin-top: 48px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
}

.post-author {
  font-size: 0.85rem;
  color: var(--text);
  opacity: 0.65;
  font-family: monospace;
}

.post-content h2 {
  font-size: 1.4rem;
  margin: 32px 0 16px;
  border-bottom: 1px solid var(--line);
  padding-bottom: 8px;
}

.post-content h3 {
  font-size: 1.15rem;
  margin: 24px 0 12px;
}

.post-content p {
  margin-bottom: 16px;
}

.post-content ul {
  padding-left: 24px;
  margin-bottom: 16px;
}

.post-content li {
  margin-bottom: 6px;
}

.post-content pre {
  background: var(--code-bg);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 14px 16px;
  overflow-x: auto;
  margin-bottom: 20px;
  font-size: 0.9rem;
}

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

.post-content p code,
.post-content li code {
  background: var(--code-bg);
  border: 1px solid var(--line);
  padding: 2px 5px;
  border-radius: 4px;
  font-size: 0.85em;
}

.post-content a {
  color: var(--link);
  text-decoration: underline;
}

.post-content blockquote {
  border-left: 4px solid var(--line);
  padding-left: 16px;
  margin-bottom: 16px;
  opacity: 0.85;
}

.post-content hr {
  border: 0;
  border-top: 1px solid var(--line);
  margin: 32px 0;
}

.post-content pre {
  line-height: 1.45;
}

.highlight .k  { color: var(--md-code-hl-keyword-color); font-weight: 600; }
.highlight .kt { color: var(--md-code-hl-type-color); }
.highlight .nc { color: var(--md-code-hl-type-color); font-weight: 600; }
.highlight .nf { color: var(--md-code-hl-function-color); }
.highlight .nb { color: var(--md-code-hl-variable-color); }
.highlight .nd { color: var(--md-code-hl-variable-color); }
.highlight .s,
.highlight .sc { color: var(--md-code-hl-string-color); }
.highlight .m  { color: var(--md-code-hl-number-color); }
.highlight .c1,
.highlight .cm,
.highlight .cd { color: var(--md-code-hl-comment-color); font-style: italic; }
.highlight .o  { color: var(--md-code-hl-operator-color); }
.highlight .p  { color: var(--md-code-hl-punctuation-color); }

.post-content details {
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 12px 16px;
  margin-bottom: 20px;
  background: var(--code-bg);
}

.post-content summary {
  cursor: pointer;
  font-weight: 600;
  user-select: none;
}

.post-content details[open] summary {
  margin-bottom: 12px;
  border-bottom: 1px solid var(--line);
  padding-bottom: 8px;
}