:root {
  --paper: #faf8f3;
  --ink: #211e18;
  --ink-soft: #6f6858;
  --hairline: #e2dccd;
  --gold: #96781d;
  --gold-deep: #7a6012;
  --code-bg: #f1ede2;
  --code-ink: #3a352b;
  --tok-comment: #8d8574;
  --tok-keyword: #9d4239;
  --tok-string: #43653f;
  --tok-const: #8a5a00;
  --tok-entity: #6b539b;
  --tok-tag: #38635e;
  --serif: "Georgia", "Times New Roman", "Songti SC", "Noto Serif SC", "SimSun", serif;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --mono: ui-monospace, "SF Mono", "JetBrains Mono", "Cascadia Code", Menlo, Consolas, monospace;
}

@media (prefers-color-scheme: dark) {
  :root {
    --paper: #1b1914;
    --ink: #e9e4d8;
    --ink-soft: #a29a88;
    --hairline: #37332a;
    --gold: #d3ac4d;
    --gold-deep: #e5c06f;
    --code-bg: #24211a;
    --code-ink: #d8d2c2;
    --tok-comment: #837b69;
    --tok-keyword: #e08a7d;
    --tok-string: #9ec08b;
    --tok-const: #d9b35c;
    --tok-entity: #b5a3e8;
    --tok-tag: #82c0b7;
  }
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.75;
}

body > * {
  max-width: 44rem;
  margin-inline: auto;
  padding-inline: 1.25rem;
}

a { color: inherit; text-decoration: underline; text-decoration-color: var(--gold); text-underline-offset: 3px; }
a:hover { color: var(--gold-deep); }

.kicker {
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--gold);
  margin: 0 0 0.75rem;
}
.kicker a { color: inherit; text-decoration: none; }
.kicker a:hover { text-decoration: underline; }

.meta {
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--ink-soft);
  margin: 0.3rem 0 0;
}

.alt-lang { color: var(--gold); }

/* ---------- masthead / index ---------- */

.masthead {
  border-top: 4px double var(--ink);
  border-bottom: 1px solid var(--hairline);
  padding-top: 2.5rem;
  padding-bottom: 1.75rem;
  margin-top: 2rem;
}

.masthead h1 {
  font-family: var(--serif);
  font-size: clamp(2.1rem, 6vw, 3.1rem);
  font-weight: 700;
  letter-spacing: 0.02em;
  margin: 0;
}

.masthead .subtitle {
  color: var(--ink-soft);
  margin: 0.5rem 0 0;
  font-size: 0.95rem;
}

.year { margin-top: 2.5rem; }

.year-label {
  font-family: var(--mono);
  font-size: 0.8rem;
  letter-spacing: 0.2em;
  color: var(--ink-soft);
  border-bottom: 1px solid var(--hairline);
  padding-bottom: 0.4rem;
  margin: 0 0 0.5rem;
}

.entries { list-style: none; margin: 0; padding: 0; }

.entry {
  display: grid;
  grid-template-columns: 3.6rem 1fr;
  gap: 0.9rem;
  padding: 1.05rem 0;
}
.entry + .entry { border-top: 1px solid var(--hairline); }

.no {
  font-family: var(--mono);
  font-size: 0.8rem;
  color: var(--gold);
  padding-top: 0.35rem;
  white-space: nowrap;
}

.entry-title {
  font-family: var(--serif);
  font-size: 1.25rem;
  font-weight: 700;
  line-height: 1.45;
  text-decoration: none;
}
.entry-title:hover {
  color: inherit;
  text-decoration: underline;
  text-decoration-color: var(--gold);
  text-decoration-thickness: 2px;
}

@media (prefers-reduced-motion: no-preference) {
  .masthead, .entry {
    animation: rise 0.45s ease both;
    animation-delay: var(--d, 0ms);
  }
  @keyframes rise {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: none; }
  }
}

/* ---------- post page ---------- */

article { margin-top: 2rem; }

.post-header {
  border-top: 4px double var(--ink);
  border-bottom: 1px solid var(--hairline);
  padding-top: 2.5rem;
  padding-bottom: 1.5rem;
  margin-bottom: 2rem;
}

.post-header h1 {
  font-family: var(--serif);
  font-size: clamp(1.6rem, 5vw, 2.3rem);
  line-height: 1.35;
  margin: 0;
}

.post-footer {
  border-top: 1px solid var(--hairline);
  margin-top: 3rem;
  padding: 1.5rem 0 0.5rem;
  font-family: var(--mono);
  font-size: 0.85rem;
}

.site-footer {
  border-top: 1px solid var(--hairline);
  margin-top: 3.5rem;
  padding-top: 1.25rem;
  padding-bottom: 2.5rem;
  font-size: 0.8rem;
  color: var(--ink-soft);
}

/* ---------- markdown body (GitHub-rendered HTML) ---------- */

.markdown-body { overflow-wrap: break-word; }

.markdown-body h1, .markdown-body h2, .markdown-body h3,
.markdown-body h4, .markdown-body h5, .markdown-body h6 {
  font-family: var(--serif);
  line-height: 1.4;
  margin: 2.2em 0 0.7em;
}
.markdown-body h1 { font-size: 1.6rem; }
.markdown-body h2 { font-size: 1.4rem; border-bottom: 1px solid var(--hairline); padding-bottom: 0.3em; }
.markdown-body h3 { font-size: 1.15rem; }

.markdown-body p { margin: 0 0 1.1em; }

.markdown-body img {
  max-width: 100%;
  height: auto;
  border: 1px solid var(--hairline);
  border-radius: 4px;
}

.markdown-body blockquote {
  margin: 1.2em 0;
  padding: 0.1em 1.2em;
  border-left: 3px solid var(--gold);
  color: var(--ink-soft);
}

.markdown-body hr { border: 0; border-top: 1px solid var(--hairline); margin: 2.5em 0; }

.markdown-body ul, .markdown-body ol { padding-left: 1.6em; margin: 0 0 1.1em; }
.markdown-body li + li { margin-top: 0.25em; }
.markdown-body .task-list-item { list-style: none; margin-left: -1.4em; }

.markdown-body table {
  border-collapse: collapse;
  display: block;
  overflow-x: auto;
  max-width: 100%;
  margin: 0 0 1.2em;
  font-size: 0.92em;
}
.markdown-body th, .markdown-body td {
  border: 1px solid var(--hairline);
  padding: 0.45em 0.8em;
}
.markdown-body th { background: var(--code-bg); font-family: var(--mono); font-size: 0.85em; }

.markdown-body code {
  font-family: var(--mono);
  font-size: 0.86em;
  background: var(--code-bg);
  border-radius: 4px;
  padding: 0.15em 0.35em;
}

.markdown-body pre {
  background: var(--code-bg);
  color: var(--code-ink);
  border-radius: 6px;
  padding: 1em 1.2em;
  overflow-x: auto;
  line-height: 1.6;
  margin: 0 0 1.2em;
}
.markdown-body pre code { background: none; padding: 0; font-size: 0.86rem; }
.markdown-body .highlight pre { margin: 0 0 1.2em; }

.markdown-body sup a { text-decoration: none; font-family: var(--mono); font-size: 0.8em; }
.markdown-body details { margin: 0 0 1.1em; }
.markdown-body summary { cursor: pointer; }

.markdown-body .markdown-alert {
  border-left: 3px solid var(--gold);
  padding: 0.1em 1.2em;
  margin: 1.2em 0;
}
.markdown-body .markdown-alert-title {
  font-family: var(--mono);
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--gold);
  display: flex;
  align-items: center;
  gap: 0.4em;
}
.markdown-body .markdown-alert-title .octicon { fill: currentColor; }

/* GitHub (Linguist) syntax token classes */
.pl-c, .pl-c span { color: var(--tok-comment); font-style: italic; }
.pl-k, .pl-kos { color: var(--tok-keyword); }
.pl-s, .pl-pds, .pl-sr { color: var(--tok-string); }
.pl-c1, .pl-mi, .pl-mb { color: var(--tok-const); }
.pl-en { color: var(--tok-entity); }
.pl-e { color: var(--tok-entity); }
.pl-ent { color: var(--tok-tag); }
.pl-smi, .pl-v { color: var(--code-ink); }
.pl-mh, .pl-mh .pl-en, .pl-ms { color: var(--tok-entity); font-weight: 600; }
.pl-md { color: var(--tok-keyword); background: transparent; }
.pl-mi1 { color: var(--tok-string); background: transparent; }