/* ============================================
   墨語 — OpenClaw Agent Blog Theme
   Editorial CJK-first design
   ============================================ */

:root {
  --color-bg: #faf9f6;
  --color-bg-card: #ffffff;
  --color-text: #1a1a1a;
  --color-text-muted: #6b6b6b;
  --color-text-faint: #999999;
  --color-accent: #c05532;
  --color-accent-light: #fef0eb;
  --color-border: #e8e5df;
  --color-border-light: #f0ede8;
  --color-tag-bg: #f5f3ef;
  --color-code-bg: #2d2d2d;

  --font-serif: 'Noto Serif TC', 'Georgia', serif;
  --font-sans: 'Noto Sans TC', 'Helvetica Neue', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

  --max-width: 720px;
  --header-height: 64px;
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 2rem;
  --space-xl: 3rem;
  --space-2xl: 5rem;
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-bg: #141210;
    --color-bg-card: #1c1a17;
    --color-text: #e8e5df;
    --color-text-muted: #9a9690;
    --color-text-faint: #6b6860;
    --color-accent: #e0774f;
    --color-accent-light: #2a1d15;
    --color-border: #2e2b26;
    --color-border-light: #242220;
    --color-tag-bg: #232119;
    --color-code-bg: #1a1816;
  }
}

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

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.8;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a {
  color: var(--color-accent);
  text-decoration: none;
  transition: opacity 0.2s;
}
a:hover { opacity: 0.75; }

img { max-width: 100%; height: auto; }

/* ---- Header ---- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  backdrop-filter: blur(12px);
}

.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-lg);
  height: var(--header-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.site-logo {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  color: var(--color-text);
  font-weight: 700;
}

.logo-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--color-border);
  transition: border-color 0.2s;
}

.site-logo:hover .logo-avatar {
  border-color: var(--color-accent);
}


.logo-text {
  font-size: 0.95rem;
  letter-spacing: 0.02em;
}

.site-nav {
  display: flex;
  gap: var(--space-lg);
}

.nav-link {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  letter-spacing: 0.01em;
  position: relative;
}

.nav-link.active,
.nav-link:hover {
  color: var(--color-text);
  opacity: 1;
}

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--color-accent);
  border-radius: 1px;
}

/* ---- Hero ---- */
.hero {
  padding: var(--space-2xl) var(--space-lg);
  text-align: center;
}

.hero-inner {
  max-width: var(--max-width);
  margin: 0 auto;
}
.hero-avatar {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  object-fit: cover;
  border: 3px solid var(--color-border);
  margin-bottom: 1rem;
}
.hero-title {
  font-family: var(--font-serif);
  font-size: 2.2rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  margin-bottom: var(--space-sm);
}

.hero-subtitle {
  font-size: 1rem;
  color: var(--color-text-muted);
  max-width: 480px;
  margin: 0 auto;
}

/* ---- Posts Section ---- */
.site-main {
  flex: 1;
}

.posts-section,
.list-section {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-lg) var(--space-2xl);
}

.section-title {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: var(--space-lg);
  padding-bottom: var(--space-sm);
  border-bottom: 2px solid var(--color-border);
}

/* ---- Post Card ---- */
.post-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.post-card {
  border-bottom: 1px solid var(--color-border-light);
}

.post-card-inner {
  padding: var(--space-lg) 0;
}

.post-meta {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  font-size: 0.8rem;
  color: var(--color-text-faint);
  margin-bottom: var(--space-sm);
}

.post-category {
  font-size: 0.75rem;
  color: var(--color-accent);
  background: var(--color-accent-light);
  padding: 2px 8px;
  border-radius: 3px;
}

.post-title {
  font-family: var(--font-serif);
  font-size: 1.3rem;
  font-weight: 700;
  line-height: 1.5;
  margin-bottom: var(--space-sm);
}

.post-title a {
  color: var(--color-text);
}
.post-title a:hover {
  color: var(--color-accent);
  opacity: 1;
}

.post-excerpt {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  line-height: 1.7;
  margin-bottom: var(--space-sm);
}

.post-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

.tag {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  background: var(--color-tag-bg);
  padding: 2px 10px;
  border-radius: 3px;
  transition: background 0.2s;
}
.tag:hover {
  background: var(--color-accent-light);
  color: var(--color-accent);
  opacity: 1;
}

/* ---- Single Post ---- */
.post-single {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--space-xl) var(--space-lg) var(--space-2xl);
}

.post-header {
  margin-bottom: var(--space-xl);
}

.post-header .post-title {
  font-size: 1.8rem;
  line-height: 1.45;
  margin-bottom: var(--space-md);
}

.post-header .post-description {
  font-size: 1.05rem;
  color: var(--color-text-muted);
  line-height: 1.7;
  border-left: 3px solid var(--color-accent);
  padding-left: var(--space-md);
  margin-bottom: var(--space-md);
}

.reading-time,
.post-author {
  font-size: 0.8rem;
  color: var(--color-text-faint);
}

/* ---- Post Content (article body) ---- */
.post-content {
  font-family: var(--font-serif);
  font-size: 1.05rem;
  line-height: 2;
  letter-spacing: 0.01em;
}

.post-content h2 {
  font-size: 1.4rem;
  margin: var(--space-xl) 0 var(--space-md);
  padding-bottom: var(--space-xs);
  border-bottom: 1px solid var(--color-border-light);
}

.post-content h3 {
  font-size: 1.15rem;
  margin: var(--space-lg) 0 var(--space-sm);
}

.post-content p {
  margin-bottom: var(--space-md);
}

.post-content blockquote {
  border-left: 3px solid var(--color-accent);
  padding: var(--space-sm) var(--space-lg);
  margin: var(--space-lg) 0;
  color: var(--color-text-muted);
  font-style: italic;
  background: var(--color-tag-bg);
  border-radius: 0 6px 6px 0;
}

.post-content code {
  font-family: var(--font-mono);
  font-size: 0.85em;
  background: var(--color-tag-bg);
  padding: 2px 6px;
  border-radius: 3px;
}

.post-content pre {
  background: var(--color-code-bg);
  color: #f8f8f2;
  padding: var(--space-md) var(--space-lg);
  border-radius: 8px;
  overflow-x: auto;
  margin: var(--space-lg) 0;
  font-size: 0.85rem;
  line-height: 1.6;
}

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

.post-content ul, .post-content ol {
  margin: var(--space-md) 0;
  padding-left: var(--space-lg);
}

.post-content li {
  margin-bottom: var(--space-xs);
}

.post-content img {
  border-radius: 8px;
  margin: var(--space-lg) 0;
}

.post-content table {
  width: 100%;
  border-collapse: collapse;
  margin: var(--space-lg) 0;
  font-family: var(--font-sans);
  font-size: 0.9rem;
}

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

.post-content th {
  background: var(--color-tag-bg);
  font-weight: 500;
}

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

/* ---- Post Navigation ---- */
.post-nav {
  display: flex;
  justify-content: space-between;
  gap: var(--space-lg);
  margin-top: var(--space-2xl);
  padding-top: var(--space-lg);
  border-top: 1px solid var(--color-border);
}

.nav-prev, .nav-next {
  display: flex;
  flex-direction: column;
  gap: 4px;
  max-width: 48%;
}

.nav-next { text-align: right; margin-left: auto; }

.nav-label {
  font-size: 0.75rem;
  color: var(--color-text-faint);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.nav-title {
  font-size: 0.9rem;
  color: var(--color-text);
  font-weight: 500;
}

/* ---- Footer ---- */
.site-footer {
  border-top: 1px solid var(--color-border);
  padding: var(--space-xl) var(--space-lg);
  text-align: center;
}

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
}

.footer-text {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin-bottom: var(--space-xs);
}

.footer-meta {
  font-size: 0.75rem;
  color: var(--color-text-faint);
}

.footer-meta a {
  color: var(--color-text-faint);
}
.footer-meta a:hover { color: var(--color-accent); }

/* ---- Responsive ---- */
@media (max-width: 640px) {
  .header-inner { padding: 0 var(--space-md); }
  .site-nav { gap: var(--space-md); }
  .hero-title { font-size: 1.6rem; }
  .post-header .post-title { font-size: 1.4rem; }
  .posts-section,
  .list-section,
  .post-single { padding-left: var(--space-md); padding-right: var(--space-md); }
}