/* Csea — 素雅文青风格 / Elegant & warm aesthetic */
:root {
  --bg: #faf9f6;
  --bg-soft: #f4f3f0;
  --bg-accent: #ede9e3;
  --text: #3d3d3d;
  --text-dim: #7a7a7a;
  --accent: #a0826d;
  --accent-2: #b8956a;
  --border: #d9cfc3;
  --radius: 12px;
  --max: 1180px;
  --serif: "Merriweather", "Noto Serif SC", Georgia, serif;
  --sans: "Inter", "Noto Sans SC", system-ui, sans-serif;
  --mono: "JetBrains Mono", "Courier New", monospace;
}

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

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); text-decoration: none; transition: color 0.2s; }
a:hover { color: var(--accent-2); }

/* ── Nav ─────────────────────────────────────────────── */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(250, 249, 246, 0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 14px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav-logo {
  display: flex;
  align-items: baseline;
  gap: 10px;
  cursor: pointer;
}
.nav-title {
  font-family: var(--serif);
  font-weight: 700;
  font-size: 22px;
  color: var(--text);
}
.nav-tagline {
  font-family: var(--sans);
  font-size: 13px;
  color: var(--text-dim);
  white-space: nowrap;
}
.nav-links {
  display: flex;
  gap: 24px;
  align-items: center;
}
.nav-links a {
  font-size: 14px;
  color: var(--text-dim);
}
.nav-links a:hover { color: var(--accent); }

.lang-btn {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--text-dim);
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 6px 12px;
  cursor: pointer;
  transition: all 0.2s;
}
.lang-btn:hover { border-color: var(--accent); color: var(--accent); }

/* ── Home layout: 主区 + 侧栏 ───────────────────────── */
.home-layout {
  max-width: var(--max);
  margin: 0 auto;
  padding: 40px 24px 80px;
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 56px;
  align-items: start;
}

/* 主区：博客 */
.home-main { min-width: 0; }

.blog-head-count {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--text-dim);
}

.blog-filter {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 28px;
}
.filter-btn {
  font-size: 13px;
  padding: 6px 14px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--bg-soft);
  color: var(--text-dim);
  cursor: pointer;
  transition: all 0.2s;
}
.filter-btn.active { background: var(--accent); color: #fff; border-color: var(--accent); }
.filter-btn:hover { border-color: var(--accent); color: var(--accent); }

/* 博客列表：纵向流，更适合阅读 */
.blog-list { display: flex; flex-direction: column; }
.blog-card {
  display: grid;
  grid-template-columns: 96px 1fr;
  gap: 24px;
  padding: 24px 0;
  border-bottom: 1px solid var(--border);
  cursor: pointer;
  transition: all 0.2s;
}
.blog-card:hover { padding-left: 8px; }
.blog-card:hover .blog-card-title { color: var(--accent); }
.blog-card-date {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--text-dim);
  white-space: nowrap;
  padding-top: 4px;
}
.blog-card-body { min-width: 0; }
.blog-card-title {
  font-family: var(--serif);
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--text);
  transition: color 0.2s;
}
.blog-card-excerpt {
  font-size: 14px;
  color: var(--text-dim);
  margin-bottom: 10px;
  line-height: 1.7;
}
.blog-card-cat {
  font-size: 12px;
  color: var(--accent);
  font-weight: 500;
}

/* ── 侧栏 ───────────────────────────────────────────── */
.sidebar {
  position: sticky;
  top: 80px;
  display: flex;
  flex-direction: column;
  gap: 28px;
}
.side-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px;
}
.side-card h3 {
  font-family: var(--serif);
  font-size: 13px;
  letter-spacing: 0.12em;
  color: var(--text-dim);
  margin-bottom: 14px;
  text-transform: uppercase;
}

/* Profile 卡片 */
.profile-card { text-align: center; }
.profile-name {
  font-family: var(--serif);
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 4px;
}
.profile-tagline {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--accent);
  margin-bottom: 14px;
}
.profile-subtitle {
  font-size: 13px;
  color: var(--text-dim);
  line-height: 1.7;
  margin-bottom: 16px;
}
.profile-cta { display: flex; gap: 8px; justify-content: center; flex-wrap: wrap; }

/* About 精简 */
.about-mini p {
  font-size: 13px;
  color: var(--text-dim);
  line-height: 1.7;
  margin-bottom: 10px;
}
.about-mini p:last-child { margin-bottom: 0; }
.stack-tags { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 12px; }
.stack-tag {
  font-size: 11px;
  padding: 4px 10px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--bg-soft);
  color: var(--text);
}

/* 经历精简 */
.exp-mini { display: flex; flex-direction: column; gap: 14px; }
.exp-item { padding-left: 14px; position: relative; }
.exp-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 6px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
}
.exp-period { font-family: var(--mono); font-size: 10px; color: var(--text-dim); margin-bottom: 2px; }
.exp-title { font-size: 13px; font-weight: 600; color: var(--text); }
.exp-role { font-size: 12px; color: var(--accent); }

/* 联系精简 */
.contact-mini { display: flex; flex-direction: column; gap: 8px; }
.contact-mini a {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 13px;
  padding: 6px 0;
  border-bottom: 1px dashed var(--border);
}
.contact-mini a:last-child { border-bottom: none; }
.contact-mini .label { font-family: var(--mono); font-size: 11px; color: var(--text-dim); }
.contact-mini .value { color: var(--accent); font-weight: 500; }

/* ── Buttons ────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 18px;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
  border: 1px solid transparent;
}
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-2); }
.btn-ghost {
  border: 1px solid var(--border);
  color: var(--text);
  background: #fff;
}
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); }
.btn-sm { padding: 7px 14px; font-size: 12px; }

/* ── Blog post 详情页 ───────────────────────────────── */
.blog-post {
  max-width: 760px;
  margin: 0 auto;
  padding: 48px 24px 80px;
}
.blog-post-back {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 13px;
  color: var(--accent);
  margin-bottom: 28px;
  cursor: pointer;
}
.blog-post-back:hover { text-decoration: underline; }
.blog-post-meta {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 13px;
  color: var(--text-dim);
  margin-bottom: 20px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border);
}
.blog-post-views { margin-left: auto; }
.blog-post-title {
  font-family: var(--serif);
  font-size: clamp(28px, 4vw, 38px);
  font-weight: 700;
  margin-bottom: 28px;
  line-height: 1.3;
}
.blog-post-content { font-size: 16px; line-height: 1.9; color: var(--text); }
.blog-post-content h2 { font-family: var(--serif); font-size: 24px; font-weight: 700; margin: 32px 0 16px; }
.blog-post-content h3 { font-family: var(--serif); font-size: 18px; font-weight: 700; margin: 24px 0 12px; }
.blog-post-content p { margin-bottom: 16px; }
.blog-post-content ul, .blog-post-content ol { margin-left: 24px; margin-bottom: 16px; }
.blog-post-content li { margin-bottom: 8px; }
.blog-post-content code { font-family: var(--mono); font-size: 14px; background: var(--bg-soft); padding: 2px 6px; border-radius: 4px; }
.blog-post-content pre { background: var(--bg-soft); padding: 16px; border-radius: 8px; overflow-x: auto; margin-bottom: 16px; }
.blog-post-content pre code { background: none; padding: 0; }
.blog-post-content a { color: var(--accent); text-decoration: underline; text-underline-offset: 2px; }
.blog-post-content a:hover { color: var(--accent-2); }
.blog-post-content strong { font-weight: 700; color: var(--text); }
.blog-post-content em { font-style: italic; }
.blog-post-content blockquote {
  margin: 0 0 16px;
  padding: 8px 20px;
  border-left: 3px solid var(--accent);
  background: var(--bg-soft);
  color: var(--text-dim);
  font-style: italic;
}
.blog-post-content blockquote p { margin-bottom: 0; }
.blog-post-content hr { border: none; border-top: 1px solid var(--border); margin: 32px 0; }
.blog-post-content img { max-width: 100%; height: auto; border-radius: 8px; margin: 16px 0; }
.blog-post-content table { width: 100%; border-collapse: collapse; margin: 0 0 16px; font-size: 14px; }
.blog-post-content th, .blog-post-content td { border: 1px solid var(--border); padding: 8px 12px; text-align: left; }
.blog-post-content th { background: var(--bg-soft); font-weight: 600; }
.blog-post-content ul { list-style: disc; }
.blog-post-content ol { list-style: decimal; }

/* ── Footer ─────────────────────────────────────────── */
.footer {
  max-width: var(--max);
  margin: 0 auto;
  padding: 32px 24px 48px;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--text-dim);
  font-size: 13px;
  flex-wrap: wrap;
  gap: 12px;
}
.footer .mono { font-family: var(--mono); font-size: 12px; }
.footer .icp {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--text-dim);
  text-decoration: none;
  transition: color 0.2s;
}
.footer .icp:hover { color: var(--accent); }
.footer-links { display: flex; gap: 16px; align-items: center; }
.footer-link {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--text-dim);
  text-decoration: none;
  transition: color 0.2s;
}
.footer-link:hover { color: var(--accent); }

/* ── Legal page (privacy policy) ────────────────────── */
.legal-page {
  max-width: 760px;
  margin: 0 auto;
  padding: 48px 24px 80px;
}
.legal-title {
  font-family: var(--serif);
  font-size: clamp(28px, 3vw, 36px);
  font-weight: 700;
  margin-bottom: 8px;
}
.legal-updated {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--text-dim);
  margin-bottom: 24px;
}
.legal-intro {
  font-size: 15px;
  line-height: 1.8;
  color: var(--text);
  padding: 16px 20px;
  background: var(--bg-soft);
  border-left: 3px solid var(--accent);
  border-radius: 0 8px 8px 0;
  margin-bottom: 32px;
}
.legal-section-title {
  font-family: var(--serif);
  font-size: 20px;
  font-weight: 700;
  margin: 32px 0 12px;
}
.legal-section-body {
  font-size: 15px;
  line-height: 1.8;
  color: var(--text);
  margin-bottom: 16px;
}

/* ── Reveal animation ───────────────────────────────── */
.reveal { opacity: 0; transform: translateY(16px); transition: opacity 0.6s, transform 0.6s; }
.reveal.in { opacity: 1; transform: none; }

/* ── Responsive ─────────────────────────────────────── */
@media (max-width: 900px) {
  .home-layout {
    grid-template-columns: 1fr;
    gap: 40px;
    padding: 32px 20px 60px;
  }
  .sidebar {
    position: static;
    order: -1;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
  }
  .profile-card { grid-column: 1 / -1; }
}
@media (max-width: 600px) {
  .nav-links a:not(.lang-btn) { display: none; }
  .sidebar { grid-template-columns: 1fr; }
  .blog-card { grid-template-columns: 1fr; gap: 6px; }
  .blog-card-date { padding-top: 0; }
  .blog-post { padding: 32px 20px 60px; }
}