/* ================================================
   Limbus Archive Theme v1.1
   CRT Terminal Aesthetics with Accessibility Focus
   ================================================ */

/* === CSS Variables === */
:root {
  --color-background: #DEDAC8;
  --color-text: #2B2B2B;
  --color-border: #A19C8C;
  --color-accent: #802020;
  --font-ui: 'JetBrains Mono', 'Roboto Mono', 'Courier New', monospace;
  --font-body: 'Source Serif Pro', Georgia, serif;
  --line-height: 1.8;
  --letter-spacing: 0.02em;
}

/* === Global Reset === */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  border-radius: 0 !important; /* 硬核直角：全站禁止圆角 */
}

/* === Body & Scanline Effect === */
body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: var(--line-height);
  letter-spacing: var(--letter-spacing);
  color: var(--color-text);
  background-color: var(--color-background);
  position: relative;
  overflow-x: hidden;
}

/* 扫描线纹理层 */
body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: repeating-linear-gradient(
    to bottom,
    transparent 0px,
    transparent 1px,
    rgba(0, 0, 0, 0.03) 1px,
    rgba(0, 0, 0, 0.03) 2px
  );
  pointer-events: none;
  z-index: 9999;
}

/* === Typography === */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-ui);
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 1rem;
}

h1 { font-size: 2rem; }
h2 { font-size: 1.5rem; font-weight: 600; }
h3 { font-size: 1.25rem; font-weight: 600; }

p {
  margin-bottom: 1rem;
}

a {
  color: var(--color-text);
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  color: var(--color-accent);
}

/* === Layout Container === */
.site-container {
  display: grid;
  grid-template-columns: 280px 1fr 280px;
  gap: 0;
  max-width: 1400px;
  margin: 0 auto;
  min-height: 100vh;
}

/* === 左侧：导航终端 (Navigation Console) === */
.nav-console {
  border-right: 1px solid var(--color-border);
  padding: 2rem 1.5rem;
  position: sticky;
  top: 0;
  height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-y: auto;
}

.site-title {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 3rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  /* 平面文字，无浮雕 */
}

.nav-menu {
  list-style: none;
  flex-grow: 1;
}

.nav-menu li {
  margin-bottom: 0.75rem;
}

.nav-menu a,
.rss-link {
  display: inline-block;
  padding: 0.5rem 0.75rem;
  font-family: var(--font-ui);
  font-size: 0.95rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border: 1px solid var(--color-border);
  
  /* 外浮雕效果 (Raised) */
  box-shadow: 
    2px 2px 0 rgba(0, 0, 0, 0.1),
    inset -1px -1px 0 rgba(0, 0, 0, 0.05),
    inset 1px 1px 0 rgba(255, 255, 255, 0.3);
  
  transition: all 0.1s ease;
}

.nav-menu a:hover,
.rss-link:hover {
  color: var(--color-accent);
  border-color: var(--color-accent);
}

.nav-menu a:active,
.rss-link:active,
.nav-menu a.active {
  /* 内浮雕效果 (Pressed) */
  box-shadow: 
    inset 2px 2px 3px rgba(0, 0, 0, 0.15),
    inset -1px -1px 0 rgba(255, 255, 255, 0.2);
  transform: translateY(1px);
}

.rss-section {
  margin-top: auto;
  padding-top: 2rem;
}

.rss-link {
  display: block;
  text-align: center;
  font-weight: 700;
  color: var(--color-accent);
  border-color: var(--color-accent);
}

/* === 中间：内容流水线 (Main Feed) === */
.main-feed {
  padding: 2rem;
  border-right: 1px solid var(--color-border);
}

.article-container {
  border: 1px solid var(--color-border);
  padding: 2rem;
  margin-bottom: 2rem;
  background: rgba(255, 255, 255, 0.3);
}

.article-container + .article-container {
  border-top: 1px solid var(--color-border);
}

.article-meta {
  font-family: var(--font-ui);
  font-size: 0.85rem;
  color: #666;
  margin-bottom: 1rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.article-title {
  margin-bottom: 1.5rem;
}

.article-title a {
  /* 标题为纯阅读文字，保持平面 */
  display: block;
}

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

.article-summary {
  margin-bottom: 1rem;
}

.read-more {
  display: inline-block;
  font-family: var(--font-ui);
  font-size: 0.9rem;
  text-transform: uppercase;
  color: var(--color-accent);
  border-bottom: 1px solid var(--color-accent);
  padding-bottom: 2px;
}

.read-more:hover {
  border-bottom: 2px solid var(--color-accent);
}

/* 文章内容样式 */
.article-content {
  /* 正文纯阅读，平面无浮雕 */
}

.article-content img {
  max-width: 100%;
  height: auto;
  border: 1px solid var(--color-border);
  margin: 1.5rem 0;
}

.article-content pre {
  background: rgba(0, 0, 0, 0.05);
  border: 1px solid var(--color-border);
  padding: 1rem;
  overflow-x: auto;
  font-family: var(--font-ui);
  font-size: 0.9rem;
  margin: 1rem 0;
}

.article-content code {
  font-family: var(--font-ui);
  font-size: 0.9rem;
  background: rgba(0, 0, 0, 0.05);
  padding: 0.2rem 0.4rem;
}

.article-content pre code {
  background: none;
  padding: 0;
}

.article-content blockquote {
  border-left: 3px solid var(--color-accent);
  padding-left: 1.5rem;
  margin: 1.5rem 0;
  font-style: italic;
  color: #555;
}

.article-content ul,
.article-content ol {
  margin-left: 2rem;
  margin-bottom: 1rem;
}

.article-content li {
  margin-bottom: 0.5rem;
}

/* 分页导航 */
.pagination {
  display: flex;
  justify-content: center;
  gap: 1rem;
  margin-top: 3rem;
  font-family: var(--font-ui);
}

.pagination a,
.pagination span {
  display: inline-block;
  padding: 0.5rem 1rem;
  border: 1px solid var(--color-border);
  
  /* 外浮雕 */
  box-shadow: 
    2px 2px 0 rgba(0, 0, 0, 0.1),
    inset -1px -1px 0 rgba(0, 0, 0, 0.05),
    inset 1px 1px 0 rgba(255, 255, 255, 0.3);
}

.pagination a:active {
  /* 内浮雕 */
  box-shadow: 
    inset 2px 2px 3px rgba(0, 0, 0, 0.15);
  transform: translateY(1px);
}

.pagination .current {
  background: rgba(0, 0, 0, 0.05);
  font-weight: 700;
}

/* === 右侧：索引与导录 (TOC) === */
.toc-sidebar {
  padding: 2rem 1.5rem;
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
}

.toc-container {
  border: 1px solid var(--color-border);
  padding: 1.5rem;
  background: rgba(255, 255, 255, 0.2);
}

.toc-title {
  font-family: var(--font-ui);
  font-size: 0.95rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 1rem;
  border-bottom: 1px solid var(--color-border);
  padding-bottom: 0.5rem;
}

.toc-list {
  list-style: none;
}

.toc-list li {
  margin-bottom: 0.5rem;
}

.toc-list a {
  font-family: var(--font-ui);
  font-size: 0.85rem;
  display: block;
  padding: 0.25rem 0;
  border-left: 2px solid transparent;
  padding-left: 0.75rem;
  transition: all 0.2s ease;
}

.toc-list a:hover,
.toc-list a.active {
  border-left-color: var(--color-accent);
  color: var(--color-accent);
  padding-left: 1rem;
}

/* H3 缩进 */
.toc-list .toc-h3 {
  padding-left: 1.5rem;
}

.toc-list .toc-h3:hover,
.toc-list .toc-h3.active {
  padding-left: 1.75rem;
}

/* === 响应式设计 === */
@media (max-width: 1200px) {
  .site-container {
    grid-template-columns: 240px 1fr;
  }
  
  .toc-sidebar {
    display: none;
  }
}

@media (max-width: 768px) {
  .site-container {
    grid-template-columns: 1fr;
  }
  
  .nav-console {
    position: relative;
    height: auto;
    border-right: none;
    border-bottom: 1px solid var(--color-border);
  }
  
  .main-feed {
    border-right: none;
  }
  
  .article-container {
    padding: 1.5rem;
  }
}

/* === Footer === */
.site-footer {
  grid-column: 1 / -1;
  border-top: 1px solid var(--color-border);
  padding: 2rem;
  text-align: center;
  font-family: var(--font-ui);
  font-size: 0.85rem;
  color: #666;
}

/* === 无障碍增强 === */
*:focus {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

/* 高对比度模式支持 */
@media (prefers-contrast: high) {
  :root {
    --color-background: #F5F5F5;
    --color-text: #000000;
    --color-border: #666666;
  }
}

/* 减少动画模式支持 */
@media (prefers-reduced-motion: reduce) {
  * {
    transition: none !important;
    animation: none !important;
  }
}