:root {
  --bg: #f4f0e6;
  --paper: #f8f4ea;
  --ink: #1f1d1a;
  --ink-soft: #5f5a53;
  --line: rgba(49, 44, 37, 0.22);
  --accent: #8b1d1d;
  --accent-soft: rgba(139, 29, 29, 0.14);
  --shadow: 0 10px 28px rgba(31, 29, 26, 0.1);
}

* {
  box-sizing: border-box;
}

html,
body {
  height: 100%;
}

body {
  margin: 0;
  font-family: "Source Han Serif SC", "Noto Serif SC", "Songti SC", "STSong", serif;
  color: var(--ink);
  line-height: 1.86;
  background:
    radial-gradient(circle at 12% 10%, rgba(64, 55, 44, 0.08) 0, transparent 23%),
    radial-gradient(circle at 87% 18%, rgba(64, 55, 44, 0.06) 0, transparent 24%),
    radial-gradient(circle at 64% 94%, rgba(64, 55, 44, 0.05) 0, transparent 28%),
    linear-gradient(180deg, #f6f2e9 0%, var(--bg) 100%);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.container {
  width: min(940px, 92vw);
  margin: 0 auto;
}

.site-header {
  margin-top: 22px;
  padding: 34px 24px 20px;
  border: 1px solid var(--line);
  background:
    linear-gradient(180deg, rgba(248, 244, 234, 0.95), rgba(245, 239, 226, 0.88));
  box-shadow: var(--shadow);
  position: relative;
}

.site-header::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
}

.site-header h1 {
  margin: 0;
  font-size: clamp(34px, 4.8vw, 56px);
  line-height: 1.18;
  letter-spacing: 0.04em;
  font-weight: 700;
}

.site-header p {
  margin: 10px 0 0;
  color: var(--ink-soft);
  font-size: clamp(15px, 2.1vw, 18px);
}

.site-nav {
  margin-top: 16px;
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.site-nav a {
  text-decoration: none;
  color: #2a2621;
  padding: 6px 12px;
  border: 1px solid var(--line);
  background: rgba(248, 244, 234, 0.75);
  font-size: 14px;
  transition: all 160ms ease;
}

.site-nav a:hover {
  color: var(--accent);
  border-color: rgba(139, 29, 29, 0.38);
  background: rgba(248, 244, 234, 0.98);
}

.site-nav a.active {
  color: #fff;
  background: var(--accent);
  border-color: var(--accent);
}

.post-list {
  padding: 26px 0 60px;
  display: grid;
  gap: 12px;
}

main {
  flex: 1 0 auto;
}

.post-list h2 {
  margin: 2px 0 8px;
  font-size: 26px;
  letter-spacing: 0.02em;
  position: relative;
  padding-left: 14px;
}

.post-list h2::before {
  content: "";
  position: absolute;
  left: 0;
  top: 6px;
  width: 4px;
  height: 70%;
  background: var(--accent);
}

.post-card {
  border: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(248, 244, 234, 0.94), rgba(244, 238, 226, 0.9));
  padding: 18px 20px;
  box-shadow: var(--shadow);
}

.post-card h3 {
  margin: 0 0 8px;
  font-size: clamp(24px, 3.4vw, 32px);
  line-height: 1.3;
}

.post-card a {
  color: var(--ink);
  text-decoration: none;
}

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

.meta {
  color: var(--ink-soft);
  margin: 0 0 8px;
  font-size: 13px;
  letter-spacing: 0.03em;
}

.post-content {
  margin-top: 18px;
  padding: 28px 24px 60px;
  max-width: 48em;
  font-size: clamp(17px, 2.2vw, 20px);
  border: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(248, 244, 234, 0.95), rgba(244, 238, 226, 0.9));
  box-shadow: var(--shadow);
}

.post-content h2 {
  margin-top: 30px;
  margin-bottom: 8px;
  font-size: clamp(26px, 3.2vw, 34px);
  position: relative;
  padding-left: 14px;
}

.post-content h2::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  width: 4px;
  height: 70%;
  background: var(--accent);
}

.post-content h1 {
  margin-top: 6px;
  margin-bottom: 12px;
  font-size: clamp(30px, 3.8vw, 40px);
  line-height: 1.25;
}

.post-content h3 {
  margin-top: 20px;
  margin-bottom: 8px;
}

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

.post-content ul {
  padding-left: 22px;
}

.post-content ol {
  padding-left: 24px;
}

.post-content blockquote {
  margin: 16px 0;
  padding: 8px 14px;
  border-left: 4px solid var(--accent);
  background: rgba(139, 29, 29, 0.06);
  color: #2f2b25;
}

.post-content blockquote p {
  margin: 8px 0;
}

.post-content hr {
  border: 0;
  border-top: 1px solid rgba(49, 44, 37, 0.22);
  margin: 22px 0;
}

.post-content code {
  background: rgba(79, 70, 56, 0.09);
  border: 1px solid rgba(79, 70, 56, 0.2);
  padding: 0 5px;
  font-size: 0.9em;
}

.post-content pre {
  background: rgba(79, 70, 56, 0.1);
  border: 1px solid rgba(79, 70, 56, 0.2);
  padding: 12px;
  overflow: auto;
}

.post-content pre code {
  border: 0;
  background: transparent;
  padding: 0;
}

.post-content img {
  display: block;
  max-width: 100%;
  height: auto;
  margin: 16px auto;
  border: 1px solid rgba(79, 70, 56, 0.25);
}

.archive-list {
  padding: 26px 0 60px;
}

.archive-list ul {
  margin: 0;
  padding-left: 0;
  list-style: none;
}

.archive-list li {
  margin: 10px 0;
  padding: 12px 14px;
  border: 1px solid var(--line);
  background: rgba(248, 244, 234, 0.84);
}

.archive-list a {
  color: var(--ink);
  text-decoration: none;
}

.archive-list a:hover {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.site-footer {
  border-top: 1px solid var(--line);
  padding: 22px 0 34px;
  color: var(--ink-soft);
  font-size: 14px;
}

.site-footer .container {
  text-align: center;
}

@media (max-width: 768px) {
  .site-header {
    margin-top: 14px;
    padding: 24px 16px 14px;
  }

  .site-nav a {
    font-size: 13px;
    padding: 5px 10px;
  }

  .post-card {
    padding: 16px;
  }

  .post-content {
    padding: 20px 16px 46px;
  }
}

@media (prefers-reduced-motion: reduce) {
  * {
    transition: none !important;
  }
}