/* ============================================================
   primarystar 的个人博客 · 极简风格
   参考 sinyalee.com：白底、纯文字、左对齐、克制留白
   ============================================================ */

:root {
  --text: #1a1a1a;
  --text-soft: #555;
  --muted: #8a8a8a;
  --line: #e6e6e6;
  --link: #0a6cff;
  --maxw: 680px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --font-mono: "SF Mono", "JetBrains Mono", Consolas, "Courier New", monospace;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  background: #ffffff;
  color: var(--text);
  line-height: 1.8;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

.container {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 56px 24px 96px;
}

/* ---------- 首页头部 ---------- */
.site-title {
  font-size: 30px;
  font-weight: 700;
  letter-spacing: -0.3px;
  margin-bottom: 10px;
}
.site-tagline {
  color: var(--text-soft);
  font-size: 15px;
  margin-bottom: 56px;
}

/* ---------- 区块标题 ---------- */
h2 {
  font-size: 18px;
  font-weight: 700;
  margin: 44px 0 14px;
}

/* ---------- 关于我（占位） ---------- */
.intro-placeholder {
  border: 1px dashed var(--line);
  border-radius: 6px;
  padding: 20px 22px;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.9;
}
.intro-placeholder strong { color: var(--text-soft); font-weight: 600; }

/* ---------- 文章列表 ---------- */
.post-list { list-style: none; }
.post-list li {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 20px;
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
}
.post-list li:last-child { border-bottom: none; }
.post-list a {
  color: var(--text);
  text-decoration: none;
  font-size: 16px;
  flex: 1;
}
.post-list a:hover { color: var(--link); }
.post-list .date {
  color: var(--muted);
  font-size: 13.5px;
  white-space: nowrap;
  font-variant-numeric: tabular-nums;
}
.empty-note { color: var(--muted); font-size: 14.5px; }

/* ---------- 文章页 ---------- */
.back-link {
  display: inline-block;
  color: var(--muted);
  text-decoration: none;
  font-size: 14px;
  margin-bottom: 40px;
}
.back-link:hover { color: var(--link); }

.article h1 {
  font-size: 26px;
  font-weight: 700;
  letter-spacing: -0.3px;
  line-height: 1.4;
  margin-bottom: 12px;
}
.article-meta {
  color: var(--muted);
  font-size: 14px;
  margin-bottom: 40px;
}

.article-body { font-size: 16.5px; }
.article-body > * + * { margin-top: 1.4em; }
.article-body h2 { font-size: 21px; margin-top: 2em; margin-bottom: 0.6em; }
.article-body h3 { font-size: 18px; margin-top: 1.8em; margin-bottom: 0.5em; }
.article-body a { color: var(--link); text-decoration: none; }
.article-body a:hover { text-decoration: underline; }
.article-body strong { font-weight: 700; }
.article-body blockquote {
  border-left: 3px solid var(--line);
  padding: 4px 0 4px 20px;
  color: var(--text-soft);
}
.article-body ul, .article-body ol { padding-left: 1.6em; }
.article-body li { margin: 0.4em 0; }
.article-body code {
  font-family: var(--font-mono);
  font-size: 0.88em;
  background: #f5f5f5;
  padding: 2px 6px;
  border-radius: 4px;
}
.article-body pre {
  background: #f7f7f7;
  padding: 16px 18px;
  border-radius: 6px;
  overflow-x: auto;
  font-size: 13.5px;
  line-height: 1.6;
}
.article-body pre code { background: transparent; padding: 0; }
.article-body img { max-width: 100%; border-radius: 6px; }
.article-body hr { border: none; border-top: 1px solid var(--line); margin: 2.4em 0; }

/* ---------- 页脚 ---------- */
.footer {
  margin-top: 72px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 13px;
  display: flex;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}
.footer a { color: var(--muted); text-decoration: none; }
.footer a:hover { color: var(--link); }

/* ---------- 404 ---------- */
.notfound { padding: 80px 0 60px; }
.notfound .code { font-size: 44px; font-weight: 700; margin-bottom: 12px; }
.notfound p { color: var(--text-soft); margin-bottom: 24px; }
.btn {
  display: inline-block;
  color: var(--link);
  text-decoration: none;
  font-size: 15px;
  border-bottom: 1px solid var(--line);
  padding-bottom: 2px;
}
.btn:hover { border-color: var(--link); }

/* ---------- 响应式 ---------- */
@media (max-width: 480px) {
  .container { padding: 40px 20px 80px; }
  .site-title { font-size: 26px; }
  .post-list li { flex-direction: column; gap: 2px; }
  .post-list .date { font-size: 12.5px; }
}