/* ===== 墨 · Ink — 写意风格 ===== */

:root {
  --bg: #faf8f5;
  --card-bg: #ffffff;
  --text: #2c2416;
  --text-muted: #8c7b6b;
  --accent: #8b7355;
  --border: #e8e0d5;
  --shadow: 0 1px 3px rgba(44, 36, 22, 0.06), 0 4px 16px rgba(44, 36, 22, 0.04);
  --radius: 8px;
  --max-width: 680px;
}

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

html {
  font-size: 17px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ===== Header ===== */

.site-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 32px 0 28px;
  border-bottom: 1px solid var(--border);
}

.site-title {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--text);
  text-decoration: none;
  letter-spacing: 0.08em;
  transition: color 0.2s;
}

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

.site-nav {
  display: flex;
  gap: 28px;
}

.site-nav a {
  font-size: 0.9rem;
  color: var(--text-muted);
  text-decoration: none;
  transition: color 0.2s;
  letter-spacing: 0.04em;
}

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

/* ===== Hero ===== */

.hero {
  text-align: center;
  padding: 56px 0 40px;
}

.avatar {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  object-fit: cover;
  margin-bottom: 20px;
  box-shadow: 0 2px 12px rgba(44, 36, 22, 0.12);
  transition: transform 0.3s ease;
}

.avatar:hover {
  transform: scale(1.05);
}

.hero-title {
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--text);
  margin-bottom: 8px;
}

.hero-subtitle {
  font-size: 0.95rem;
  color: var(--text-muted);
  letter-spacing: 0.06em;
}

/* ===== Category Tabs ===== */

.category-tabs {
  display: flex;
  justify-content: center;
  gap: 12px;
  padding: 0 0 12px;
}

.cat-tab {
  font-family: inherit;
  font-size: 0.85rem;
  color: var(--text-muted);
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px 16px;
  border-radius: 16px;
  letter-spacing: 0.05em;
  transition: all 0.2s;
}

.cat-tab:hover {
  color: var(--text);
}

.cat-tab.active {
  color: var(--accent);
  background: rgba(139, 115, 85, 0.08);
}

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

.post-list {
  padding-bottom: 40px;
}

.loading {
  text-align: center;
  color: var(--text-muted);
  font-size: 0.9rem;
}

.post-card {
  display: block;
  padding: 24px 0;
  border-bottom: 1px solid var(--border);
  text-decoration: none;
  color: var(--text);
  transition: padding 0.2s;
}

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

.post-card:first-of-type {
  border-top: 1px solid var(--border);
}

.post-card-title {
  font-size: 1.15rem;
  font-weight: 500;
  margin-bottom: 4px;
  transition: color 0.2s;
}

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

.post-card-date {
  font-size: 0.8rem;
  color: var(--text-muted);
  letter-spacing: 0.04em;
}

.post-cat-label {
  display: inline-block;
  font-size: 0.72rem;
  color: var(--accent);
  margin-left: 10px;
  padding: 1px 8px;
  border: 1px solid var(--border);
  border-radius: 10px;
  vertical-align: middle;
}

.post-card-excerpt {
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-top: 6px;
  line-height: 1.6;
  overflow: hidden;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
}

/* ===== Single Post / Markdown Content ===== */

.post-content {
  padding: 40px 0 48px;
}

.post-content h1 {
  font-size: 1.8rem;
  font-weight: 700;
  margin-bottom: 8px;
  letter-spacing: 0.06em;
  line-height: 1.4;
}

.post-content h2 {
  font-size: 1.35rem;
  font-weight: 700;
  margin-top: 40px;
  margin-bottom: 12px;
  letter-spacing: 0.04em;
}

.post-content h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-top: 32px;
  margin-bottom: 8px;
}

.post-content h4, .post-content h5, .post-content h6 {
  font-weight: 700;
  margin-top: 28px;
  margin-bottom: 6px;
}

.post-content p {
  margin-bottom: 16px;
  text-align: justify;
}

.post-content a {
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid var(--border);
  transition: border-color 0.2s;
}

.post-content a:hover {
  border-bottom-color: var(--accent);
}

.post-content blockquote {
  margin: 20px 0;
  padding: 12px 20px;
  border-left: 3px solid var(--accent);
  background: rgba(139, 115, 85, 0.04);
  color: var(--text-muted);
  font-style: italic;
  border-radius: 0 var(--radius) var(--radius) 0;
}

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

.post-content ul, .post-content ol {
  margin: 12px 0 16px 20px;
}

.post-content li {
  margin-bottom: 6px;
}

.post-content code {
  font-family: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;
  font-size: 0.85rem;
  background: rgba(44, 36, 22, 0.05);
  padding: 2px 6px;
  border-radius: 3px;
  font-weight: 400;
}

.post-content pre {
  margin: 20px 0;
  padding: 20px 24px;
  background: #f4f0eb;
  border-radius: var(--radius);
  overflow-x: auto;
  font-size: 0.82rem;
  line-height: 1.7;
  border: 1px solid var(--border);
}

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

.post-content img {
  max-width: 100%;
  max-height: 500px;
  width: auto;
  height: auto;
  border-radius: var(--radius);
  display: block;
  margin: 0 auto;
  box-shadow: var(--shadow);
  object-fit: contain;
}

.post-figure {
  margin: 24px 0;
}

.post-figure img {
  margin: 0 auto;
}

.post-figure figcaption {
  margin-top: 8px;
  font-size: 0.82rem;
  color: var(--text-muted);
  text-align: center;
  letter-spacing: 0.04em;
}

.post-content hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 36px 0;
}

.post-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 20px 0;
  font-size: 0.88rem;
}

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

.post-content th {
  background: rgba(139, 115, 85, 0.06);
  font-weight: 700;
}

/* post meta */
.post-meta {
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-bottom: 32px;
  letter-spacing: 0.04em;
}

.post-meta time {
  margin-right: 16px;
}

/* back link */
.post-back {
  display: inline-block;
  margin-bottom: 24px;
  font-size: 0.88rem;
  color: var(--text-muted);
  text-decoration: none;
  transition: color 0.2s;
}

.post-back:hover {
  color: var(--text);
}

.post-back::before {
  content: '← ';
}

/* ===== Tags ===== */

.post-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 8px;
}

.post-tag {
  font-size: 0.75rem;
  color: var(--text-muted);
  background: rgba(139, 115, 85, 0.06);
  padding: 2px 10px;
  border-radius: 12px;
  letter-spacing: 0.04em;
}

/* ===== Footer ===== */

.site-footer {
  margin-top: auto;
  padding: 32px 0;
  text-align: center;
  border-top: 1px solid var(--border);
  font-size: 0.8rem;
  color: var(--text-muted);
  letter-spacing: 0.06em;
}

/* ===== Error / Empty ===== */

.empty-message {
  text-align: center;
  color: var(--text-muted);
  padding: 40px 0;
  font-size: 0.92rem;
}

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

@media (max-width: 600px) {
  html {
    font-size: 16px;
  }

  .container {
    padding: 0 18px;
  }

  .site-header {
    padding: 24px 0 20px;
    flex-direction: column;
    gap: 10px;
  }

  .site-nav {
    gap: 20px;
  }

  .hero {
    padding: 36px 0 28px;
  }

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

  .post-content {
    padding: 28px 0 36px;
  }

  .post-content h1 {
    font-size: 1.45rem;
  }

  .post-content pre {
    padding: 14px 16px;
    font-size: 0.78rem;
  }
}