/* ===== 侧边栏+内容区布局 ===== */

:root {
  --color-bg: #f8f5f0;
  --color-sidebar: #f0ede8;
  --color-text: #2d2d2d;
  --color-accent: #2c5f45;
  --color-border: #d1cbc1;
  --color-hover: #e6ebe6;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: 'Noto Serif SC', 'Georgia', serif;
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.8;
  min-height: 100vh;
}

a {
  color: var(--color-accent);
  text-decoration: none;
}

::selection {
  background: rgba(44, 95, 69, 0.2);
}

/* --- Page Layout --- */
.page {
  display: flex;
  min-height: 100vh;
}

/* --- Sidebar --- */
.sidebar {
  width: 280px;
  min-width: 280px;
  background: var(--color-sidebar);
  border-right: 1px solid var(--color-border);
  padding: 32px 24px;
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
}

.sidebar-header {
  margin-bottom: 32px;
}

.site-title {
  font-size: 20px;
  color: var(--color-accent);
  font-weight: 700;
  margin-bottom: 8px;
}

.site-bio {
  font-size: 13px;
  color: #888;
  line-height: 1.6;
}

.posts-nav {
  margin-top: 24px;
}

.nav-title {
  font-size: 11px;
  font-weight: 600;
  color: #999;
  letter-spacing: 1px;
  text-transform: uppercase;
  margin-bottom: 12px;
}

.nav-item {
  display: block;
  padding: 10px 12px;
  font-size: 14px;
  color: var(--color-text);
  border-radius: 6px;
  margin-bottom: 4px;
  transition: all 0.2s;
}

.nav-item:hover {
  background: var(--color-hover);
  color: var(--color-accent);
}

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

/* --- Content --- */
.content {
  flex: 1;
  padding: 48px 60px;
  max-width: 800px;
}

/* --- Article --- */
.article {
  background: transparent;
}

.article-header {
  margin-bottom: 32px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--color-border);
}

.article-title {
  font-size: clamp(26px, 4vw, 34px);
  color: var(--color-accent);
  font-weight: 700;
  letter-spacing: -0.5px;
  line-height: 1.3;
  margin-bottom: 12px;
}

.article-date {
  font-size: 13px;
  color: #888;
}

.article-content {
  font-size: 16px;
  line-height: 1.9;
  color: var(--color-text);
}

.article-content p {
  margin-bottom: 20px;
}

.article-content h2 {
  font-size: 22px;
  color: var(--color-accent);
  font-weight: 700;
  margin: 40px 0 16px;
}

.article-content h3 {
  font-size: 18px;
  color: var(--color-accent);
  font-weight: 600;
  margin: 32px 0 12px;
}

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

.article-content blockquote {
  background: #f0ede8;
  border-left: 3px solid var(--color-accent);
  padding: 12px 16px;
  margin: 24px 0;
  font-style: italic;
  color: var(--color-accent);
}

.article-content pre {
  background: #2d2d2d;
  color: #e0e0e0;
  border-radius: 6px;
  padding: 16px;
  overflow-x: auto;
  font-size: 14px;
  margin: 20px 0;
}

.article-content code {
  font-family: 'SF Mono', Menlo, Consolas, monospace;
}

.article-content img {
  max-width: 100%;
  border-radius: 8px;
  margin: 24px 0;
}

.article-content ul,
.article-content ol {
  margin: 16px 0;
  padding-left: 24px;
}

.article-content li {
  margin-bottom: 8px;
}

/* --- Responsive --- */
@media (max-width: 900px) {
  .page {
    flex-direction: column;
  }
  
  .sidebar {
    width: 100%;
    min-width: auto;
    height: auto;
    position: relative;
    border-right: none;
    border-bottom: 1px solid var(--color-border);
    padding: 24px;
  }
  
  .posts-nav {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 16px;
  }
  
  .nav-title {
    display: none;
  }
  
  .nav-item {
    font-size: 13px;
    padding: 8px 12px;
  }
  
  .content {
    padding: 32px 24px;
  }
}

@media (max-width: 500px) {
  .site-bio {
    font-size: 12px;
  }
  
  .nav-item {
    font-size: 12px;
    padding: 6px 10px;
  }
  
  .article-title {
    font-size: 22px;
  }
  
  .article-content {
    font-size: 15px;
  }
}