/* ==========================================
   Deep Code Blog —— 中文博客样式
   ========================================== */

/* ---------- 重置与基础 ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --color-bg: #fcfcf9;
  --color-surface: #ffffff;
  --color-text: #2c2c2c;
  --color-text-secondary: #666;
  --color-text-muted: #999;
  --color-primary: #2c6fce;
  --color-primary-hover: #1a56b0;
  --color-border: #e8e5df;
  --color-code-bg: #f4f3f0;
  --shadow-card: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
  --shadow-card-hover: 0 4px 16px rgba(0,0,0,0.08);
  --radius: 8px;
  --max-width: 800px;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial,
    sans-serif;
  --font-mono: "SF Mono", "Fira Code", "Cascadia Code", Consolas,
    "Liberation Mono", Menlo, monospace;
}

html {
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-sans);
  color: var(--color-text);
  background: var(--color-bg);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ---------- 容器 ---------- */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
}

/* ---------- 顶部导航 ---------- */
.site-header {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  padding: 16px 0;
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(8px);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

.site-logo {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-text);
  text-decoration: none;
  letter-spacing: 0.02em;
}

.site-logo:hover {
  color: var(--color-primary);
}

.site-nav {
  display: flex;
  gap: 20px;
  align-items: center;
}

.site-nav a {
  color: var(--color-text-secondary);
  text-decoration: none;
  font-size: 0.95rem;
  transition: color 0.2s;
}

.site-nav a:hover {
  color: var(--color-primary);
}

/* ---------- 主体 ---------- */
.site-main {
  flex: 1;
  padding-top: 40px;
  padding-bottom: 60px;
}

/* ---------- 首页 Hero ---------- */
.hero {
  text-align: center;
  padding: 50px 0 40px;
}

.hero-avatar {
  margin-bottom: 20px;
}

.hero-avatar svg {
  width: 80px;
  height: 80px;
  filter: drop-shadow(0 2px 6px rgba(79,110,247,0.15));
}

.hero-avatar-img {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  object-fit: cover;
  box-shadow: 0 2px 8px rgba(79,110,247,0.18);
}

.hero-title {
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  color: var(--color-text);
  margin-bottom: 8px;
}

.hero-desc {
  color: var(--color-text-secondary);
  font-size: 1.05rem;
  max-width: 480px;
  margin: 0 auto;
  line-height: 1.6;
}

.hero-line {
  width: 48px;
  height: 3px;
  background: linear-gradient(90deg, var(--color-primary), #a78bfa);
  border-radius: 3px;
  margin: 26px auto 0;
}

/* ---------- 文章列表（博客卡片） ---------- */
.article-list {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.post-card {
  display: flex;
  padding: 28px 0;
  border-bottom: 1px solid var(--color-border);
  transition: padding 0.25s;
}

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

.post-card:hover {
  padding-left: 12px;
}

.post-card-accent {
  flex-shrink: 0;
  width: 3px;
  border-radius: 2px;
  margin-right: 24px;
  align-self: stretch;
}

.post-card-body {
  flex: 1;
  min-width: 0;
}

.post-card-meta-top {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 6px;
  font-size: 0.85rem;
}

.post-card-date {
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: 0.82rem;
}

.post-card-dot {
  color: var(--color-border);
  font-weight: 700;
}

.post-card-label {
  color: var(--color-primary);
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.post-card-title {
  font-size: 1.25rem;
  font-weight: 650;
  line-height: 1.45;
  margin-bottom: 8px;
}

.post-card-title a {
  color: var(--color-text);
  text-decoration: none;
  transition: color 0.2s;
}

.post-card-title a:hover {
  color: var(--color-primary);
}

.post-card-excerpt {
  color: var(--color-text-secondary);
  font-size: 0.95rem;
  line-height: 1.7;
  margin-bottom: 10px;
}

.post-card-link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  color: var(--color-primary);
  text-decoration: none;
  font-size: 0.88rem;
  font-weight: 500;
  transition: gap 0.2s, color 0.2s;
}

.post-card-link:hover {
  color: var(--color-primary-hover);
  gap: 8px;
}

.post-card-link .arrow {
  transition: transform 0.2s;
}

.post-card-link:hover .arrow {
  transform: translateX(2px);
}

/* ---------- 文章详情页 ---------- */
.post-full {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 40px 36px;
  box-shadow: var(--shadow-card);
}

.post-header {
  margin-bottom: 32px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--color-border);
}

.post-title {
  font-size: 1.8rem;
  font-weight: 700;
  line-height: 1.4;
}

.post-meta {
  margin-top: 12px;
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 0.9rem;
  color: var(--color-text-muted);
}

/* 文章正文排版 */
.post-content {
  font-size: 1rem;
  line-height: 1.85;
  color: var(--color-text);
}

.post-content h1,
.post-content h2,
.post-content h3,
.post-content h4,
.post-content h5,
.post-content h6 {
  margin-top: 1.6em;
  margin-bottom: 0.6em;
  font-weight: 600;
  line-height: 1.35;
  color: var(--color-text);
}

.post-content h1 { font-size: 1.6rem; }
.post-content h2 { font-size: 1.35rem; padding-bottom: 6px; border-bottom: 1px solid var(--color-border); }
.post-content h3 { font-size: 1.15rem; }
.post-content h4 { font-size: 1rem; }

.post-content p {
  margin-bottom: 1.1em;
}

.post-content a {
  color: var(--color-primary);
  text-decoration: none;
}

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

.post-content ul,
.post-content ol {
  margin: 0.8em 0 1.1em 1.5em;
}

.post-content li {
  margin-bottom: 0.35em;
}

.post-content blockquote {
  margin: 1.2em 0;
  padding: 12px 20px;
  border-left: 4px solid var(--color-primary);
  background: var(--color-code-bg);
  border-radius: 0 var(--radius) var(--radius) 0;
  color: var(--color-text-secondary);
}

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

.post-content code {
  font-family: var(--font-mono);
  font-size: 0.88em;
  background: var(--color-code-bg);
  padding: 2px 6px;
  border-radius: 4px;
  color: #c7254e;
}

.post-content pre {
  margin: 1.2em 0;
  padding: 20px 24px;
  background: #1e1e2e;
  color: #cdd6f4;
  border-radius: var(--radius);
  overflow-x: auto;
  font-size: 0.88rem;
  line-height: 1.6;
}

.post-content pre code {
  background: none;
  color: inherit;
  padding: 0;
  font-size: inherit;
}

.post-content img {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius);
  margin: 1em 0;
}

.post-content hr {
  margin: 2em 0;
  border: none;
  border-top: 1px solid var(--color-border);
}

.post-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.2em 0;
}

.post-content th,
.post-content td {
  border: 1px solid var(--color-border);
  padding: 10px 14px;
  text-align: left;
}

.post-content th {
  background: var(--color-code-bg);
  font-weight: 600;
}

/* 返回导航 */
.post-nav {
  margin-top: 24px;
}

.back-home {
  display: inline-flex;
  align-items: center;
  color: var(--color-text-secondary);
  text-decoration: none;
  font-size: 0.95rem;
  transition: color 0.2s;
}

.back-home:hover {
  color: var(--color-primary);
}

/* ---------- 友链网格 ---------- */
.links-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 16px;
  margin-top: 10px;
}

.link-card {
  display: flex;
  align-items: center;
  gap: 16px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 20px 24px;
  text-decoration: none;
  color: inherit;
  transition: box-shadow 0.2s, transform 0.15s;
}

.link-card:hover {
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-2px);
}

.link-card-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--color-code-bg);
  color: var(--color-primary);
  font-weight: 700;
  font-size: 1.1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.link-card-body {
  min-width: 0;
}

.link-card-name {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 2px;
}

.link-card-desc {
  font-size: 0.85rem;
  color: var(--color-text-secondary);
  margin-bottom: 4px;
  line-height: 1.5;
}

.link-card-url {
  font-size: 0.78rem;
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  word-break: break-all;
}

/* ---------- 空状态 ---------- */
.empty-state {
  text-align: center;
  padding: 80px 20px;
  color: var(--color-text-secondary);
}

.empty-icon {
  font-size: 3rem;
  margin-bottom: 16px;
  opacity: 0.6;
}

.empty-state h2 {
  font-size: 1.3rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 10px;
}

.empty-state p {
  font-size: 0.95rem;
  color: var(--color-text-secondary);
  max-width: 420px;
  margin: 0 auto;
  line-height: 1.7;
}

.empty-state code {
  background: var(--color-code-bg);
  padding: 2px 7px;
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 0.88em;
}

/* ---------- 404 页面 ---------- */
.error-page {
  text-align: center;
  padding: 80px 20px;
}

.error-page h1 {
  font-size: 5rem;
  font-weight: 700;
  color: var(--color-border);
  line-height: 1;
  margin-bottom: 16px;
}

.error-page p {
  font-size: 1.15rem;
  color: var(--color-text-secondary);
  margin-bottom: 24px;
}

/* ---------- 页脚 ---------- */
.site-footer {
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  padding: 24px 0;
  text-align: center;
  font-size: 0.88rem;
  color: var(--color-text-muted);
}

/* ---------- 响应式 ---------- */
@media (max-width: 600px) {
  html { font-size: 15px; }

  .post-card {
    padding: 22px 0;
  }

  .post-card:hover {
    padding-left: 4px;
  }

  .post-card-accent {
    margin-right: 14px;
  }

  .post-full {
    padding: 24px 18px;
  }

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

  .site-header .container {
    flex-direction: column;
    align-items: flex-start;
  }

  .hero-title {
    font-size: 1.6rem;
  }

  .hero {
    padding: 30px 0 28px;
  }
}