/*
======================================================
  China專題 - Minimalist Anthony Fu Inspired Stylesheet
  Focus: Typography, Whitespace, Minimal borders, Elegance
  Author: Antigravity AI
======================================================
*/

@import url('https://fonts.googleapis.com/css2?family=Fira+Mono:wght@400;500;700&family=Inter:wght@300;400;500;600;700;800&family=Noto+Serif+TC:wght@400;600;700&display=swap');

:root {
  --bg-primary: #ffffff;
  --text-primary: #1c1c1e;
  --text-secondary: #555558;
  --text-muted: #8e8e93;
  --accent: #000000;
  --accent-hover: #555558;
  --border-color: #f2f2f7;
  --mono-font: 'Fira Mono', 'Courier New', monospace;
  --sans-font: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --serif-font: 'Noto Serif TC', Georgia, serif;
  --transition: all 0.2s ease-in-out;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg-primary: #050505;
    --text-primary: #e5e5ea;
    --text-secondary: #a8a8b3;
    --text-muted: #636366;
    --accent: #ffffff;
    --accent-hover: #a8a8b3;
    --border-color: #1c1c1e;
  }
}

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

body {
  font-family: var(--sans-font);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  padding: 80px 20px 120px;
  transition: var(--transition);
}

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

/* Elegant Navbar - Anthony Fu Style */
.nav-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 80px;
}

.logo-link {
  font-family: var(--mono-font);
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--text-primary);
  text-decoration: none;
  border-bottom: 2px solid transparent;
  transition: var(--transition);
}

.logo-link:hover {
  border-color: var(--text-primary);
}

.nav-links {
  display: flex;
  gap: 20px;
  font-family: var(--mono-font);
  font-size: 0.9rem;
}

.nav-item {
  color: var(--text-muted);
  text-decoration: none;
  transition: var(--transition);
  position: relative;
}

.nav-item:hover, .nav-item.active {
  color: var(--text-primary);
}

/* Minimalist Post Header */
.post-header {
  margin-bottom: 40px;
}

.post-title {
  font-size: 2.3rem;
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: -0.5px;
  color: var(--text-primary);
  margin-bottom: 12px;
}

.post-meta {
  font-family: var(--mono-font);
  font-size: 0.85rem;
  color: var(--text-muted);
  display: flex;
  gap: 16px;
  align-items: center;
}

.post-meta .tag {
  color: var(--text-secondary);
  border-bottom: 1px dashed var(--text-muted);
  text-decoration: none;
}

.post-meta .tag:hover {
  color: var(--text-primary);
  border-color: var(--text-primary);
}

/* Cover Image - clean border-radius, elegant shadow */
.post-cover-wrapper {
  margin: 32px 0 48px;
  border-radius: 6px;
  overflow: hidden;
}

.post-cover {
  width: 100%;
  max-height: 380px;
  object-fit: cover;
  display: block;
}

/* Post Content - Beautiful Typography */
.post-content {
  font-size: 1.05rem;
  color: var(--text-secondary);
}

.post-content p {
  margin-bottom: 24px;
  text-align: justify;
}

.post-content h2 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
  margin: 48px 0 20px;
  letter-spacing: -0.3px;
}

.post-content h3 {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-primary);
  margin: 32px 0 16px;
}

.post-content ul, .post-content ol {
  margin: 0 0 24px 20px;
}

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

.post-content strong {
  color: var(--text-primary);
}

.post-content blockquote {
  font-family: var(--serif-font);
  margin: 32px 0;
  padding: 8px 0 8px 24px;
  border-left: 2px solid var(--text-muted);
  font-style: italic;
  font-size: 1.1rem;
  color: var(--text-primary);
}

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

.divider {
  height: 1px;
  background-color: var(--border-color);
  margin: 40px 0;
  border: none;
}

/* Blog Listing - Anthony Fu Style */
.listing-title {
  font-size: 1.8rem;
  font-weight: 800;
  margin-bottom: 24px;
  font-family: var(--mono-font);
  letter-spacing: -0.5px;
}

/* Minimalist Search Text Box */
.search-box-wrapper {
  margin-bottom: 48px;
}

.search-input {
  width: 100%;
  padding: 8px 0;
  background: transparent;
  border: none;
  border-bottom: 1px solid var(--border-color);
  font-family: var(--mono-font);
  font-size: 1rem;
  color: var(--text-primary);
  outline: none;
  transition: var(--transition);
}

.search-input:focus {
  border-color: var(--text-primary);
}

.search-input::placeholder {
  color: var(--text-muted);
}

/* List of articles */
.post-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.post-item {
  display: flex;
  align-items: baseline;
  text-decoration: none;
  color: inherit;
  padding: 6px 0;
  transition: var(--transition);
}

.post-item-date {
  font-family: var(--mono-font);
  font-size: 0.9rem;
  color: var(--text-muted);
  flex: 0 0 110px;
}

.post-item-title {
  font-size: 1.05rem;
  color: var(--text-secondary);
  border-bottom: 1px solid transparent;
  transition: var(--transition);
  line-height: 1.4;
}

.post-item:hover .post-item-title {
  color: var(--text-primary);
  border-bottom-color: var(--text-primary);
}

.post-item-category {
  font-family: var(--mono-font);
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-left: 12px;
  border: 1px solid var(--border-color);
  padding: 1px 6px;
  border-radius: 4px;
}

.empty-listing {
  text-align: center;
  font-family: var(--mono-font);
  color: var(--text-muted);
  padding: 40px 0;
  display: none;
}

/* Back Button */
.back-link {
  font-family: var(--mono-font);
  font-size: 0.9rem;
  color: var(--text-muted);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: var(--transition);
  display: inline-block;
  margin-bottom: 24px;
}

.back-link:hover {
  color: var(--text-primary);
  border-bottom-color: var(--text-primary);
}