/* ============================================
   《重来》Blog Styles
   Inspired by strangeloops.org — vertical, centered, minimal
   Light mode, mobile-first, readable
   ============================================ */

:root {
  --bg-primary: #f2ede6;
  --bg-secondary: #ede7df;
  --bg-card: #ffffff;

  --text-primary: #1a1a1a;
  --text-secondary: #555555;
  --text-muted: #888888;
  --text-accent: #6b5b4f;

  --border-light: #e5e2de;
  --border-medium: #d0ccc7;

  --blue-soft: #5a7a96;
  --brown-warm: #8b7355;
  --sage: #7a8a7a;

  --font-body: 'Source Sans 3', 'KaiTi', 'SimKai', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-heading: 'Source Sans 3', 'KaiTi', 'SimKai', Georgia, serif;
  --font-zh: 'KaiTi', 'SimKai', serif;

  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2.5rem;
  --space-xl: 4rem;
  --space-2xl: 6rem;

  --transition-fast: 150ms ease;
}

:root[data-theme='dark'] {
  --bg-primary: #12110f;
  --bg-secondary: #191713;
  --bg-card: #1f1d19;

  --text-primary: #f3efe8;
  --text-secondary: #c7c0b7;
  --text-muted: #a1978c;
  --text-accent: #d2b08b;

  --border-light: #2a2621;
  --border-medium: #3a342d;

  --blue-soft: #8fb0cc;
  --brown-warm: #d2b08b;
  --sage: #9fb09f;
}

@font-face {
  font-family: 'Source Sans 3';
  src: url('fonts/SourceSans3.ttf') format('truetype');
  font-display: swap;
}

@font-face {
  font-family: 'SimKai';
  src: url('fonts/simkai.ttf') format('truetype');
  font-display: swap;
}

@font-face {
  font-family: 'KaiTi';
  src: url('fonts/FandolKai-Regular.otf') format('opentype');
  font-display: swap;
}

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

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

body {
  font-family: var(--font-body);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

main {
  display: block;
}

h1, h2, h3, h4 {
  font-family: var(--font-heading);
  font-weight: 600;
  line-height: 1.3;
  color: var(--text-primary);
}

h1 { font-size: 2rem; }
h2 { font-size: 1.5rem; }
h3 { font-size: 1.25rem; }
h4 { font-size: 1.125rem; }

p {
  margin-bottom: var(--space-md);
  color: var(--text-secondary);
}

a {
  color: var(--text-primary);
  text-decoration: none;
  border-bottom: 1px solid var(--border-light);
  transition: border-color var(--transition-fast);
}

a:hover {
  border-bottom-color: var(--text-primary);
}

.container {
  max-width: 640px;
  margin: 0 auto;
  padding: 0 var(--space-md);
}

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

.home-main {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.site-header {
  padding: var(--space-lg) 0 var(--space-sm);
  text-align: center;
}

.site-title a {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
  border-bottom: none;
  letter-spacing: -0.02em;
}

.site-tagline {
  font-size: 0.95rem;
  color: var(--text-muted);
  margin-top: var(--space-xs);
  display: none;
}

.site-tagline.active {
  display: block;
}

.lang-toggle {
  display: flex;
  justify-content: center;
  gap: var(--space-xs);
  margin-top: var(--space-sm);
}

.lang-toggle button {
  background: none;
  border: 1px solid var(--border-medium);
  color: var(--text-muted);
  padding: 0.25rem 0.75rem;
  border-radius: 999px;
  cursor: pointer;
  font-size: 0.85rem;
  font-family: var(--font-body);
  transition: all var(--transition-fast);
}

.lang-toggle button.active {
  background: var(--text-primary);
  color: var(--bg-primary);
  border-color: var(--text-primary);
}

.theme-toggle {
  position: fixed;
  top: 1rem;
  right: 1rem;
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: 50%;
  width: 44px;
  height: 44px;
  font-size: 1.25rem;
  cursor: pointer;
  z-index: 100;
  box-shadow: 0 2px 8px rgba(0,0,0,0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: box-shadow var(--transition-fast);
}

.theme-toggle:hover {
  box-shadow: 0 4px 12px rgba(0,0,0,0.12);
}

.hero {
  padding: var(--space-xl) 0 var(--space-lg);
  text-align: center;
}

.hero h1 {
  font-size: 2.2rem;
  margin-bottom: var(--space-sm);
  display: none;
}

.hero h1.active {
  display: block;
}

.hero .subtitle {
  font-size: 1.1rem;
  color: var(--text-muted);
  margin-bottom: var(--space-lg);
  display: none;
}

.hero .subtitle.active {
  display: block;
}

.hero-image {
  max-width: 100%;
  height: auto;
  border-radius: 12px;
  margin-top: var(--space-md);
  display: block;
  margin-left: auto;
  margin-right: auto;
}

.divider {
  border: none;
  border-top: 1px solid var(--border-light);
  margin: 0;
}

.story-list {
  padding: var(--space-xl) 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-xl);
}

.story-item {
  display: flex;
  flex-direction: column;
}

.story-item h3 {
  margin-bottom: var(--space-xs);
}

.story-item h3 a {
  border-bottom: none;
  font-size: 1.35rem;
}

.meta {
  font-size: 0.8rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-sm);
}

.excerpt {
  font-size: 0.95rem;
  display: none;
}

.excerpt.active {
  display: block;
}

.read-more {
  display: inline-block;
  margin-top: var(--space-sm);
  font-size: 0.9rem;
  color: var(--text-accent);
  border-bottom: 1px solid transparent;
  cursor: pointer;
}

.read-more:hover {
  border-bottom-color: var(--text-accent);
}

.read-more.active {
  display: inline-block;
}

.ep-blurb {
  display: none;
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-top: var(--space-xs);
  line-height: 1.5;
}

.ep-blurb.active {
  display: block;
}

.site-footer {
  padding: var(--space-lg) 0;
  text-align: center;
  font-size: 0.8rem;
  color: var(--text-muted);
  border-top: 1px solid var(--border-light);
}

/* Episode page styles */
.episode-header {
  padding: var(--space-xl) 0 var(--space-lg);
  text-align: center;
}

.story-title {
  font-size: 1rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: var(--space-xs);
}

.episode-header h1 {
  font-size: 2rem;
  margin-bottom: var(--space-xs);
  display: none;
}

.episode-header h1.active {
  display: block;
}

.episode-meta {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.episode-content {
  padding: var(--space-xl) 0 var(--space-2xl);
  max-width: 640px;
  margin: 0 auto;
  padding-left: var(--space-md);
  padding-right: var(--space-md);
}

.episode-content .hero-image {
  width: 100%;
  max-width: 640px;
  height: auto;
  display: block;
  margin: 0 auto var(--space-xl);
  border-radius: 12px;
}

.episode-content .active {
  display: block;
}

.episode-content [data-lang]:not(.active) {
  display: none;
}

.episode-content p {
  margin-bottom: var(--space-md);
  font-size: 1.05rem;
  line-height: 1.85;
  color: var(--text-secondary);
}

.nav-episode {
  display: flex;
  justify-content: space-between;
  padding: var(--space-xl) 0;
  border-top: 1px solid var(--border-light);
  margin-top: var(--space-xl);
  font-size: 0.9rem;
  color: var(--text-muted);
}

.nav-episode a {
  color: var(--text-accent);
  border-bottom: none;
}

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

@media (max-width: 640px) {
  .hero h1 { font-size: 1.75rem; }
  .episode-header h1 { font-size: 1.6rem; }
  .episode-content p { font-size: 1rem; }
}

.section-break {
  border: none;
  border-top: 1px solid var(--border-light);
  margin: var(--space-xl) 0;
  max-width: 80px;
  margin-left: auto;
  margin-right: auto;
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    transition-duration: 0ms !important;
    animation-duration: 0ms !important;
  }
}