/* ==========================================
   Xbitfeed - 极简纯文字新闻网站样式表
   ========================================== */

/* 1. 全局变量与主题声明 */
:root {
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif;
  --font-mono: SFMono-Regular, Consolas, "Liberation Mono", Menlo, Courier, monospace;

  /* 配色系统 - 极简高对比度色系 */
  color-scheme: dark;

  --bg-page: #0b0f19;
  --bg-surface: #131b2e;
  --bg-subtle: #1e293b;

  --text-primary: #f8fafc;
  --text-secondary: #cbd5e1;
  --text-muted: #64748b;

  --accent-color: #3b82f6;
  --accent-hover: #60a5fa;
  --accent-light: #1e293b;

  --border-color: #1e293b;
  --border-subtle: #0f172a;

  --tag-bg: #1e293b;
  --tag-text: #cbd5e1;

  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.2);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.3);
  --shadow-hover: 0 10px 15px -3px rgba(0, 0, 0, 0.4);

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;

  --container-max-width: 1140px;
  --transition-fast: 0.2s ease;
}

/* 2. 基础重置 (Reset) */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-family);
  background-color: var(--bg-page);
  color: var(--text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-fast);
}

ul,
ol {
  list-style: none;
}

/* 3. 布局容器 */
.site-container {
  width: 100%;
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 1.25rem;
}

/* 4. 页头 Header */
.site-header {
  background-color: var(--bg-surface);
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(8px);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.site-logo {
  font-size: 1.4rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.site-logo span {
  color: var(--accent-color);
}

.header-right {
  display: flex;
  align-items: center;
  gap: 1.25rem;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 1.25rem;
}

.nav-link {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-secondary);
  padding: 0.4rem 0.65rem;
  border-radius: var(--radius-sm);
}

.nav-link:hover,
.nav-link.active {
  color: var(--accent-color);
  background-color: var(--accent-light);
}

.header-social {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  border-left: 1px solid var(--border-color);
  padding-left: 1rem;
}

.header-social-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  background-color: var(--bg-subtle);
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
  transition: all var(--transition-fast);
}

.header-social-link:hover {
  transform: translateY(-1px);
  color: #ffffff;
}

.header-social-link.social-x:hover {
  background-color: #0f1419;
  border-color: #0f1419;
}

.header-social-link.social-facebook:hover {
  background-color: #1877f2;
  border-color: #1877f2;
}

/* 5. 极简小型 Slogan Banner 区域 */
.hero-banner-mini {
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border-color);
  padding: 2rem 0;
  margin-bottom: 2rem;
}

.banner-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.banner-text-group {
  max-width: 680px;
}

.banner-slogan {
  font-size: 1.65rem;
  font-weight: 700;
  line-height: 1.3;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
  letter-spacing: -0.02em;
}

.banner-subtext {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

/* 为未来扩展搜索框预留槽位 */
.banner-search-slot {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.search-placeholder-badge {
  font-size: 0.825rem;
  color: var(--text-muted);
  background-color: var(--bg-subtle);
  border: 1px dashed var(--border-color);
  padding: 0.4rem 0.8rem;
  border-radius: 20px;
}

/* 6. 首页双栏网格 */
.main-grid {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 2.5rem;
  margin-bottom: 3rem;
}

/* 7. 主体新闻列表 */
.news-feed-section {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.feed-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 2px solid var(--border-color);
  padding-bottom: 0.75rem;
  margin-bottom: 0.5rem;
}

.feed-title {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-primary);
  position: relative;
}

.feed-title::after {
  content: "";
  position: absolute;
  bottom: -0.85rem;
  left: 0;
  width: 40px;
  height: 2px;
  background-color: var(--accent-color);
}

.empty-state {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 3rem 1.5rem;
  text-align: center;
  color: var(--text-muted);
}

/* 纯文字新闻卡片 */
.news-list {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.news-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.35rem 1.5rem;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), border-color var(--transition-fast);
}

.news-card:hover {
  transform: translateY(-2px);
  border-color: var(--accent-color);
  box-shadow: var(--shadow-md);
}

.news-card-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 0.5rem;
}

.news-card-title {
  font-size: 1.2rem;
  font-weight: 600;
  line-height: 1.4;
  color: var(--text-primary);
}

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

.news-card-excerpt {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 0.75rem;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.news-card-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem 0.65rem;
  font-size: 0.8rem;
  color: var(--text-muted);
  border-top: 1px solid var(--border-subtle);
  padding-top: 0.5rem;
  margin-top: 0.5rem;
}

.meta-time {
  white-space: nowrap;
  display: inline-flex;
  align-items: center;
}

.news-tag {
  display: inline-flex;
  align-items: center;
  font-size: 0.75rem;
  color: var(--tag-text);
  background-color: var(--tag-bg);
  padding: 0.12rem 0.45rem;
  border-radius: var(--radius-sm);
  font-weight: 500;
  white-space: nowrap;
  cursor: default;
  user-select: none;
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

.news-tag:hover {
  background-color: var(--accent-light);
  color: var(--accent-color);
}


/* 8. 右侧侧边栏 Widget */
.sidebar-section {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.widget-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.25rem;
}

.widget-header {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.calendar-month-badge {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-secondary);
  background-color: var(--bg-subtle);
  padding: 0.15rem 0.5rem;
  border-radius: 12px;
}

.calendar-table {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.calendar-header-row {
  display: grid;
  grid-template-columns: repeat(7, minmax(0, 1fr));
  gap: 0.3rem;
  padding-bottom: 0.35rem;
  border-bottom: 1px solid var(--border-subtle);
}

.calendar-header-cell {
  color: var(--text-muted);
  font-size: 0.7rem;
  font-weight: 600;
  text-align: center;
  text-transform: uppercase;
}

.calendar-body {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.calendar-week-row {
  display: grid;
  grid-template-columns: repeat(7, minmax(0, 1fr));
  gap: 0.3rem;
}

.calendar-day-cell,
.calendar-day {
  align-items: center;
  background-color: var(--bg-subtle);
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-height: 2.2rem;
  padding: 0.25rem 0.1rem;
  text-align: center;
  transition: all var(--transition-fast);
}

.calendar-day-cell:hover:not(.is-today),
.calendar-day:hover:not(.is-today) {
  background-color: var(--accent-light);
  border-color: var(--border-color);
  transform: translateY(-1px);
}

.calendar-date {
  color: var(--text-primary);
  font-size: 0.82rem;
  font-weight: 600;
  white-space: nowrap;
}

.calendar-day-cell.is-past,
.calendar-day.is-past {
  opacity: 0.45;
}

.calendar-day-cell.is-past .calendar-date,
.calendar-day.is-past .calendar-date {
  color: var(--text-muted);
}

.calendar-day-cell.is-today,
.calendar-day.is-today {
  background-color: var(--accent-color);
  border-color: transparent;
  box-shadow: none;
  opacity: 0.75;
}

.calendar-day-cell.is-today .calendar-date,
.calendar-day.is-today .calendar-date {
  color: #ffffff;
  font-weight: 700;
}

/* 模块一：热门文章榜单 */
.trending-list {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

.trending-item {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
}

.trending-rank {
  font-size: 0.85rem;
  font-weight: 800;
  color: var(--text-muted);
  width: 22px;
  height: 22px;
  line-height: 22px;
  text-align: center;
  border-radius: 4px;
  background-color: var(--bg-subtle);
  flex-shrink: 0;
}

.trending-rank.top-1 {
  background-color: #ef4444;
  color: #fff;
}

.trending-rank.top-2 {
  background-color: #f97316;
  color: #fff;
}

.trending-rank.top-3 {
  background-color: #eab308;
  color: #fff;
}

.trending-title {
  font-size: 0.9rem;
  font-weight: 500;
  line-height: 1.4;
  color: var(--text-primary);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

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

/* 模块二：热门分类/标签 */
.tag-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.tag-item {
  display: inline-flex;
  align-items: center;
  gap: 0.15rem;
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--text-secondary);
  background-color: var(--bg-subtle);
  border: 1px solid var(--border-subtle);
  padding: 0.25rem 0.65rem;
  border-radius: var(--radius-sm);
  cursor: default;
  user-select: none;
  transition: all var(--transition-fast);
}

.tag-hash {
  color: var(--accent-color);
  font-weight: 600;
  opacity: 0.75;
}

.tag-item:hover {
  background-color: var(--accent-light);
  color: var(--accent-color);
  border-color: var(--accent-color);
  transform: translateY(-1px);
}

.tag-item:hover .tag-hash {
  opacity: 1;
}

/* 模块三：网站公告栏 */
.notice-text {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* 9. 分页组件 (Pagination) */
.pagination-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  margin-top: 1.5rem;
  padding: 1rem;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
}

.page-btn {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-primary);
  background-color: var(--bg-subtle);
  border: 1px solid var(--border-color);
  padding: 0.45rem 1rem;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.page-btn:hover {
  background-color: var(--accent-color);
  color: #ffffff;
  border-color: var(--accent-color);
}

.page-info {
  font-size: 0.875rem;
  color: var(--text-muted);
  font-weight: 500;
}

/* 10. 页脚 Footer */
.site-footer {
  margin-top: auto;
  background-color: var(--bg-surface);
  border-top: 1px solid var(--border-color);
  padding: 1.75rem 0;
  color: var(--text-muted);
  font-size: 0.875rem;
}

.footer-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.25rem;
  flex-wrap: wrap;
}

.footer-info {
  line-height: 1.5;
}

.footer-social {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.social-label {
  color: var(--text-secondary);
  font-weight: 500;
  font-size: 0.85rem;
}

.footer-social-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.35rem 0.75rem;
  background-color: var(--bg-subtle);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-size: 0.825rem;
  font-weight: 500;
  transition: all var(--transition-fast);
}

.footer-social-link:hover {
  transform: translateY(-1px);
  color: #ffffff;
}

.footer-social-link.social-x:hover {
  background-color: #0f1419;
  border-color: #0f1419;
}

.footer-social-link.social-facebook:hover {
  background-color: #1877f2;
  border-color: #1877f2;
}

/* 11. 自适应响应式 (Responsive 断点) */
@media (max-width: 960px) {
  .main-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .sidebar-section {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.25rem;
  }
}

@media (max-width: 640px) {
  .banner-slogan {
    font-size: 1.35rem;
  }

  .banner-content {
    flex-direction: column;
    align-items: flex-start;
  }

  .news-card {
    padding: 1rem 1.15rem;
  }

  .news-card-title {
    font-size: 1.05rem;
  }

  .sidebar-section {
    grid-template-columns: 1fr;
  }

  .news-card-meta {
    gap: 0.35rem 0.5rem;
    font-size: 0.775rem;
  }

  .news-detail-card {
    padding: 1.1rem 1.15rem;
  }

  .news-detail-title {
    font-size: 1.35rem;
  }

  .footer-container {
    flex-direction: column;
    text-align: center;
    justify-content: center;
  }

  .header-social {
    border-left: none;
    padding-left: 0;
  }
}

/* 12. 新闻详情页样式 (Detail Page Styles) */
.news-detail-section {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

.back-link-wrapper {
  margin-bottom: 0;
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--accent-color);
  padding: 0.35rem 0.75rem;
  background-color: var(--accent-light);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.back-link:hover {
  background-color: var(--accent-color);
  color: #ffffff;
}

.news-detail-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.35rem 1.5rem;
  box-shadow: var(--shadow-sm);
}

.news-detail-header {
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 0.75rem;
  margin-bottom: 1rem;
}

.news-detail-title {
  font-size: 1.65rem;
  font-weight: 700;
  line-height: 1.35;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
  letter-spacing: -0.02em;
}

.news-detail-meta {
  display: flex;
  align-items: center;
  gap: 1rem;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.news-detail-body {
  font-size: 1.025rem;
  line-height: 1.75;
  color: var(--text-primary);
}

.news-detail-body p {
  margin-bottom: 0.85rem;
}

.news-detail-body h2,
.news-detail-body h3 {
  margin: 1.15rem 0 0.65rem 0;
  color: var(--text-primary);
  font-weight: 700;
}

.news-detail-body blockquote {
  border-left: 4px solid var(--accent-color);
  padding-left: 1rem;
  margin: 1rem 0;
  color: var(--text-secondary);
  background-color: var(--bg-subtle);
  padding: 0.65rem 0.85rem;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

.news-share {
  margin-top: 0;
  padding: 1rem 1.25rem;
  background-color: var(--bg-subtle);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

@media (min-width: 640px) {
  .news-share {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }
}

.news-share-title {
  margin-bottom: 0;
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 600;
  letter-spacing: 0.01em;
}

.news-share-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.625rem;
}

.news-share-action {
  display: inline-flex;
  min-height: 2.375rem;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.45rem 0.9rem;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  background-color: var(--bg-surface);
  cursor: pointer;
  font: inherit;
  font-size: 0.85rem;
  font-weight: 600;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-fast);
}

.news-share-icon {
  flex-shrink: 0;
  transition: transform var(--transition-fast);
}

.news-share-action:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.news-share-action:hover .news-share-icon {
  transform: scale(1.15);
}

.news-share-x:hover,
.news-share-x:focus-visible {
  border-color: #0f1419;
  background-color: #0f1419;
  color: #ffffff;
  outline: none;
}

.news-share-facebook:hover,
.news-share-facebook:focus-visible {
  border-color: #1877f2;
  background-color: #1877f2;
  color: #ffffff;
  outline: none;
}

.news-share-line:hover,
.news-share-line:focus-visible {
  border-color: #06c755;
  background-color: #06c755;
  color: #ffffff;
  outline: none;
}

.news-share-bluesky:hover,
.news-share-bluesky:focus-visible {
  border-color: #1185fe;
  background-color: #1185fe;
  color: #ffffff;
  outline: none;
}

/* 13. 详情页推荐模块 (Detail Recommendations) */
.news-recommendations-section {
  margin-top: 0;
  padding: 1rem 1.25rem;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}

.news-recommendations-header {
  margin-bottom: 0.85rem;
  padding-bottom: 0.65rem;
  border-bottom: 1px solid var(--border-color);
}

.news-recommendations-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 0.4rem;
  letter-spacing: -0.01em;
  margin: 0;
}

.news-recommendations-icon {
  font-size: 1.05rem;
}

.news-recommendations-list {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.news-recommendation-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.55rem 0.75rem;
  border-radius: var(--radius-sm);
  background-color: transparent;
  border: 1px solid transparent;
  text-decoration: none;
  transition: all var(--transition-fast);
}

.news-recommendation-item:hover {
  background-color: var(--accent-light);
  border-color: var(--border-subtle);
  transform: translateX(4px);
}

.news-recommendation-main {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  flex: 1;
  min-width: 0;
}

.news-recommendation-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--text-muted);
  flex-shrink: 0;
  transition: background-color var(--transition-fast), transform var(--transition-fast);
}

.news-recommendation-item:hover .news-recommendation-dot {
  background-color: var(--accent-color);
  transform: scale(1.3);
}

.news-recommendation-title-text {
  font-size: 0.93rem;
  font-weight: 500;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  line-height: 1.4;
  transition: color var(--transition-fast);
}

.news-recommendation-item:hover .news-recommendation-title-text {
  color: var(--accent-color);
}

.news-recommendation-time {
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--text-muted);
  flex-shrink: 0;
  white-space: nowrap;
}

@media (max-width: 640px) {
  .news-recommendation-item {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.2rem;
    padding: 0.5rem 0.65rem;
  }

  .news-recommendation-title-text {
    white-space: normal;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
  }

  .news-recommendation-time {
    padding-left: 1rem;
    font-size: 0.75rem;
  }
}

/* ==========================================
   14. 错误页面 (404 & 500 Error Pages)
   ========================================== */
.error-page-wrapper {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: calc(100vh - 220px);
  padding: 3rem 1.25rem;
}

.error-card {
  width: 100%;
  max-width: 580px;
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 3.5rem 2.5rem;
  text-align: center;
  box-shadow: 0 20px 40px -15px rgba(0, 0, 0, 0.5), inset 0 1px 0 rgba(255, 255, 255, 0.05);
  position: relative;
  overflow: hidden;
  backdrop-filter: blur(12px);
}

.error-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 60%;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--accent-color), transparent);
}

.error-card-500::before {
  background: linear-gradient(90deg, transparent, #ef4444, transparent);
}

.error-badge-container {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  margin-bottom: 1.5rem;
  position: relative;
}

.error-code-glow {
  font-size: 6.5rem;
  font-weight: 900;
  line-height: 1;
  letter-spacing: -0.04em;
  font-family: var(--font-mono);
  background: linear-gradient(135deg, #60a5fa 0%, #3b82f6 50%, #1d4ed8 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  filter: drop-shadow(0 4px 16px rgba(59, 130, 246, 0.35));
  user-select: none;
  animation: pulseGlow 4s ease-in-out infinite alternate;
}

.error-code-glow.code-500 {
  background: linear-gradient(135deg, #fca5a5 0%, #ef4444 50%, #b91c1c 100%);
  filter: drop-shadow(0 4px 16px rgba(239, 68, 68, 0.35));
}

@keyframes pulseGlow {
  0% {
    filter: drop-shadow(0 4px 16px rgba(59, 130, 246, 0.25));
    transform: scale(1);
  }
  100% {
    filter: drop-shadow(0 6px 24px rgba(59, 130, 246, 0.5));
    transform: scale(1.02);
  }
}

.error-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  margin-top: -0.75rem;
  padding: 0.3rem 0.85rem;
  background-color: var(--accent-light);
  border: 1px solid rgba(59, 130, 246, 0.3);
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--accent-color);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.error-pill.pill-500 {
  background-color: rgba(239, 68, 68, 0.12);
  border-color: rgba(239, 68, 68, 0.3);
  color: #f87171;
}

.error-title {
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 0.85rem;
  letter-spacing: -0.02em;
}

.error-description {
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.65;
  margin-bottom: 2.25rem;
  max-width: 440px;
  margin-left: auto;
  margin-right: auto;
}

.error-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.btn-error-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.6rem;
  background: linear-gradient(135deg, #3b82f6 0%, #2563eb 100%);
  color: #ffffff;
  font-weight: 600;
  font-size: 0.95rem;
  border-radius: var(--radius-sm);
  border: none;
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.35);
  transition: all var(--transition-fast);
  cursor: pointer;
  text-decoration: none;
}

.btn-error-primary:hover {
  background: linear-gradient(135deg, #60a5fa 0%, #3b82f6 100%);
  box-shadow: 0 6px 18px rgba(37, 99, 235, 0.5);
  transform: translateY(-2px);
  color: #ffffff;
}

.btn-error-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.4rem;
  background-color: var(--bg-subtle);
  color: var(--text-secondary);
  font-weight: 600;
  font-size: 0.95rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
  transition: all var(--transition-fast);
  cursor: pointer;
  text-decoration: none;
}

.btn-error-secondary:hover {
  background-color: var(--accent-light);
  color: var(--text-primary);
  border-color: var(--border-subtle);
  transform: translateY(-2px);
}

@media (max-width: 640px) {
  .error-card {
    padding: 2.5rem 1.5rem;
  }
  
  .error-code-glow {
    font-size: 5rem;
  }
  
  .error-title {
    font-size: 1.4rem;
  }
  
  .error-actions {
    flex-direction: column;
    width: 100%;
  }

  .btn-error-primary,
  .btn-error-secondary {
    width: 100%;
  }
}