/* 由紀的博客 — 极简风格 */

:root {
  --bg: #fdfdfc;
  --text: #2b2b2b;
  --text-soft: #6b6b6b;
  --accent: #0f6b5c;
  --border: #e8e6e1;
  --max-width: 680px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #1a1a1a;
    --text: #d6d3cd;
    --text-soft: #8a877f;
    --accent: #5cb8a4;
    --border: #2e2c29;
  }
}

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

html {
  scroll-behavior: smooth;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: "Noto Serif SC", "Source Han Serif SC", Georgia, "Songti SC", SimSun, serif;
  font-size: 17px;
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 3rem 1.25rem 4rem;
}

/* ---------- 头部 ---------- */

.site-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--border);
  margin-bottom: 2.5rem;
}

.site-title {
  font-size: 1.25rem;
  font-weight: 600;
}

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

.site-nav a {
  color: var(--text-soft);
  text-decoration: none;
  margin-left: 1.25rem;
  font-size: 0.95rem;
  transition: color 0.2s;
}

.site-nav a:hover {
  color: var(--accent);
}

/* ---------- 首页 ---------- */

.intro {
  margin-bottom: 3rem;
  color: var(--text-soft);
}

.list-title {
  font-size: 0.85rem;
  font-weight: 400;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--text-soft);
  margin-bottom: 1.5rem;
}

.post-item {
  margin-bottom: 2.25rem;
}

.post-item a {
  text-decoration: none;
  color: inherit;
  display: block;
}

.post-item h3 {
  font-size: 1.15rem;
  font-weight: 600;
  transition: color 0.2s;
}

.post-item a:hover h3 {
  color: var(--accent);
}

.post-item time {
  display: block;
  font-size: 0.85rem;
  color: var(--text-soft);
  margin: 0.2rem 0 0.4rem;
}

.post-excerpt {
  font-size: 0.95rem;
  color: var(--text-soft);
}

/* ---------- 文章页 ---------- */

.post-header {
  margin-bottom: 2.5rem;
}

.post-header h1 {
  font-size: 1.75rem;
  font-weight: 600;
  line-height: 1.4;
}

.post-header time {
  display: block;
  margin-top: 0.5rem;
  font-size: 0.9rem;
  color: var(--text-soft);
}

.post-content p {
  margin-bottom: 1.25rem;
}

.post-content h2 {
  font-size: 1.25rem;
  margin: 2.25rem 0 1rem;
}

.post-content a {
  color: var(--accent);
  text-underline-offset: 3px;
}

.post-content blockquote {
  border-left: 3px solid var(--border);
  padding-left: 1rem;
  color: var(--text-soft);
  margin: 1.5rem 0;
}

.post-content code {
  font-family: Consolas, "JetBrains Mono", monospace;
  font-size: 0.9em;
  background: var(--border);
  padding: 0.1em 0.35em;
  border-radius: 4px;
}

.back-link {
  display: inline-block;
  margin-top: 3rem;
  color: var(--text-soft);
  text-decoration: none;
  font-size: 0.9rem;
}

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

/* ---------- 关于页 / 页脚 ---------- */

.about-content p {
  margin-bottom: 1.25rem;
}

.about-content a {
  color: var(--accent);
}

.site-footer {
  margin-top: 4rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
  font-size: 0.85rem;
  color: var(--text-soft);
}