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

:root {
  --bg: #fff;
  --text: #1a1a1a;
  --text-secondary: #666;
  --border: #e8e8e8;
  --link: #2563eb;
  --link-hover: #1d4ed8;
  --sidebar-bg: #f8f9fb;
  --card-bg: #fff;
  --tag-bg: #f0f4ff;
  --tag-text: #3b82f6;
  --code-bg: #f5f5f5;
  --shadow: 0 1px 3px rgba(0,0,0,0.06);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0d1117;
    --text: #e6edf3;
    --text-secondary: #8b949e;
    --border: #30363d;
    --link: #58a6ff;
    --link-hover: #79c0ff;
    --sidebar-bg: #161b22;
    --card-bg: #161b22;
    --tag-bg: #1c2a3d;
    --tag-text: #58a6ff;
    --code-bg: #161b22;
    --shadow: 0 1px 3px rgba(0,0,0,0.3);
  }
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  background-color: var(--bg);
  color: var(--text);
  line-height: 1.7;
  min-height: 100vh;
  transition: background 0.3s, color 0.3s;
}

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

a:hover {
  color: var(--link-hover);
}

/* ===== Layout ===== */

.layout {
  display: flex;
  min-height: 100vh;
}

.sidebar {
  width: 30%;
  max-width: 380px;
  min-width: 260px;
  background: var(--sidebar-bg);
  border-right: 1px solid var(--border);
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
  flex-shrink: 0;
}

.content {
  width: 70%;
  flex: 1;
  min-width: 0;
  padding: 48px 20px;
  max-width: 900px;
}

.post,
.home,
.page {
  max-width: 680px;
  margin: 0 auto;
}

.page-content {
  max-width: 680px;
  margin: 0 auto;
}

/* ===== Sidebar ===== */

.sidebar-inner {
  padding: 40px 28px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.site-brand {
  margin-bottom: 4px;
}

.site-title {
  font-size: 1.5rem;
  font-weight: 700;
}

.site-title a {
  color: var(--text);
}

.site-title a:hover {
  color: var(--link);
}

.site-desc {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-top: 4px;
}

/* Author card */
.author-card {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 16px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  box-shadow: var(--shadow);
}

.author-avatar {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  object-fit: cover;
  flex-shrink: 0;
}

.author-name {
  font-size: 1.05rem;
  font-weight: 600;
}

.author-bio {
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.welcome-text {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.author-tags {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.author-tags li {
  font-size: 0.85rem;
  color: var(--text);
  padding: 5px 0;
}

.author-quote {
  font-style: italic;
  color: var(--text-secondary);
  border-left: 3px solid var(--border);
  padding-left: 14px;
  font-size: 0.9rem;
}

/* Navigation */
.sidebar-nav {
  display: flex;
  flex-direction: column;
  gap: 2px;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 16px 0;
}

.sidebar-nav a {
  display: block;
  padding: 8px 14px;
  border-radius: 6px;
  font-size: 0.95rem;
  color: var(--text);
  transition: background 0.2s;
}

.sidebar-nav a:hover,
.sidebar-nav a.active {
  background: var(--tag-bg);
  color: var(--link);
}

/* Social */
.sidebar-social {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.sidebar-social a {
  color: var(--text-secondary);
}

.sidebar-social a:hover {
  color: var(--link);
}

.sidebar-social .sep {
  margin: 0 6px;
}

.sidebar-qq {
  font-size: 0.78rem;
  color: var(--text-secondary);
}

/* Sidebar footer */
.sidebar-footer {
  margin-top: auto;
  padding-top: 16px;
  border-top: 1px solid var(--border);
  font-size: 0.78rem;
  color: var(--text-secondary);
}

/* ===== Content ===== */

.section-title {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 24px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--border);
}

/* ===== Post List ===== */

.post-list {
  list-style: none;
  display: flex;
  flex-direction: column;
}

.post-item {
  border-bottom: 1px solid var(--border);
}

.post-item:last-child {
  border-bottom: none;
}

.post-link {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding: 18px 0;
  color: var(--text);
  transition: padding-left 0.2s;
}

.post-link:hover {
  padding-left: 8px;
}

.post-link h3 {
  font-size: 1.05rem;
  font-weight: 600;
}

.post-link:hover h3 {
  color: var(--link);
}

.post-date {
  font-size: 0.82rem;
  color: var(--text-secondary);
  white-space: nowrap;
  margin-left: 20px;
  font-variant-numeric: tabular-nums;
}

/* ===== Pagination ===== */

.pagination {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 32px;
  padding-top: 20px;
  border-top: 2px solid var(--border);
  font-size: 0.9rem;
}

.pagination-prev,
.pagination-next {
  color: var(--link);
  font-weight: 500;
}

.pagination-prev.disabled,
.pagination-next.disabled {
  color: var(--text-secondary);
  cursor: default;
}

.pagination-info {
  color: var(--text-secondary);
}

/* ===== Post (Article Reading) ===== */

.post-header {
  margin-bottom: 36px;
}

.post-header .back-home {
  display: inline-block;
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 16px;
}

.post-header .back-home:hover {
  color: var(--link);
}

.post-title {
  font-size: 2rem;
  font-weight: 800;
  line-height: 1.3;
  margin-bottom: 10px;
}

.post-header .post-date {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-left: 0;
}

.post-content {
  font-size: 1.05rem;
  line-height: 1.8;
}

.post-content p {
  margin-bottom: 1.2em;
}

.post-content a {
  text-decoration: underline;
}

.post-content blockquote {
  border-left: 3px solid var(--border);
  padding-left: 18px;
  margin: 1.2em 0;
  color: var(--text-secondary);
}

.post-content code {
  background: var(--code-bg);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.9em;
  font-family: "Cascadia Code", "Fira Code", "JetBrains Mono", monospace;
}

.post-content pre {
  background: var(--code-bg);
  padding: 16px 20px;
  border-radius: 8px;
  overflow-x: auto;
  margin: 1.2em 0;
}

.post-content pre code {
  background: none;
  padding: 0;
}

.post-content img {
  max-width: 100%;
  border-radius: 6px;
}

.post-footer {
  margin-top: 48px;
  padding-top: 24px;
  border-top: 2px solid var(--border);
}

.post-footer .back-home {
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.post-footer .back-home:hover {
  color: var(--link);
}

/* ===== Page ===== */

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

.page-title {
  font-size: 1.8rem;
  font-weight: 700;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--border);
}

.page-content {
  font-size: 1.05rem;
  line-height: 1.8;
}

.page-content p {
  margin-bottom: 1em;
}

.page-content blockquote {
  border-left: 3px solid var(--border);
  padding-left: 18px;
  margin: 1.2em 0;
  color: var(--text-secondary);
}

/* ===== Responsive ===== */

@media (max-width: 768px) {
  .layout {
    flex-direction: column;
  }

  .content {
    order: -1;
    width: 100%;
    padding: 32px 20px;
  }

  .post,
  .home,
  .page,
  .page-content {
    max-width: 100%;
  }

  .sidebar {
    width: 100%;
    max-width: 100%;
    min-width: 0;
    height: auto;
    position: relative;
    border-right: none;
    border-bottom: 1px solid var(--border);
  }

  .sidebar-inner {
    padding: 28px 20px;
    gap: 16px;
  }

  .post-title {
    font-size: 1.5rem;
  }

  .post-link {
    flex-direction: column;
    gap: 4px;
  }

  .post-date {
    margin-left: 0;
  }
}