/* CSS Variables for theming */
:root {
  --color-bg: #ffffff;
  --color-bg-secondary: #f8f9fa;
  --color-text: #1a1a2e;
  --color-text-secondary: #6c757d;
  --color-accent: #4361ee;
  --color-accent-hover: #3a56d4;
  --color-border: #e9ecef;
  --color-card-bg: #ffffff;
  --color-card-shadow: rgba(0, 0, 0, 0.08);
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: "SF Mono", Monaco, "Cascadia Code", monospace;
  --max-width: 800px;
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-bg: #0f0f1a;
    --color-bg-secondary: #1a1a2e;
    --color-text: #e8e8e8;
    --color-text-secondary: #a0a0a0;
    --color-accent: #6c8cff;
    --color-accent-hover: #8ba3ff;
    --color-border: #2a2a3e;
    --color-card-bg: #1a1a2e;
    --color-card-shadow: rgba(0, 0, 0, 0.3);
  }
}

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

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

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

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

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

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

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

.nav-container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--spacing-md) var(--spacing-lg);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--spacing-md);
}

.site-title {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--color-text);
}

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

.nav-links {
  display: flex;
  gap: var(--spacing-lg);
  align-items: center;
}

.nav-links a {
  color: var(--color-text-secondary);
  font-size: 0.95rem;
}

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

.rss-link {
  display: flex;
  align-items: center;
}

/* Main Content */
.main-content {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--spacing-xl) var(--spacing-lg);
  flex: 1;
  width: 100%;
}

/* Page Title */
.page-title {
  font-size: 1.75rem;
  font-weight: 600;
  margin-bottom: var(--spacing-xl);
  color: var(--color-text);
}

/* Article Cards */
.articles-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

.article-card {
  background-color: var(--color-card-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--spacing-lg);
  transition: box-shadow 0.2s ease, transform 0.2s ease;
}

.article-card:hover {
  box-shadow: 0 4px 12px var(--color-card-shadow);
  transform: translateY(-2px);
}

.article-title {
  font-size: 1.25rem;
  font-weight: 600;
  line-height: 1.4;
  margin-bottom: var(--spacing-sm);
}

.article-link {
  color: var(--color-text);
}

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

.article-meta {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-sm);
}

.article-excerpt {
  color: var(--color-text-secondary);
  font-size: 0.95rem;
  margin-bottom: var(--spacing-md);
}

.article-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-xs);
}

/* Tags */
.tag, .tag-small {
  display: inline-block;
  background-color: var(--color-bg-secondary);
  color: var(--color-text-secondary);
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-sm);
  font-size: 0.8rem;
  transition: background-color 0.2s ease, color 0.2s ease;
}

.tag:hover, .tag-small:hover {
  background-color: var(--color-accent);
  color: white;
}

.more-tags {
  color: var(--color-text-secondary);
  font-size: 0.8rem;
  padding: var(--spacing-xs);
}

/* Tags Cloud */
.tags-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
}

.tags-cloud .tag {
  font-size: 0.9rem;
}

.tags-cloud .tag span {
  opacity: 0.7;
  font-size: 0.8em;
}

/* Tag Page */
.tag-header {
  margin-bottom: var(--spacing-xl);
}

.back-link {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  display: inline-block;
  margin-bottom: var(--spacing-md);
}

.tag-count {
  color: var(--color-text-secondary);
  margin-top: var(--spacing-sm);
}

/* Full Article */
.article-full {
  max-width: 100%;
}

.article-header {
  margin-bottom: var(--spacing-xl);
}

.article-header h1 {
  font-size: 2rem;
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: var(--spacing-md);
}

/* Audio Player */
.audio-player {
  background-color: var(--color-bg-secondary);
  border-radius: var(--radius-md);
  padding: var(--spacing-lg);
  margin-bottom: var(--spacing-xl);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.audio-player audio {
  width: 100%;
}

.download-link {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  color: var(--color-accent);
  font-size: 0.9rem;
}

/* Article Image */
.article-image {
  margin-bottom: var(--spacing-xl);
}

.article-image img {
  border-radius: var(--radius-md);
  width: 100%;
}

.article-image figcaption {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  margin-top: var(--spacing-sm);
  font-style: italic;
}

.photo-author {
  display: block;
  margin-top: var(--spacing-xs);
}

/* Article Content */
.article-content {
  font-size: 1.05rem;
  line-height: 1.8;
  margin-bottom: var(--spacing-xl);
}

.article-content p {
  margin-bottom: var(--spacing-md);
}

.article-content a {
  text-decoration: underline;
}

/* Article Footer */
.article-footer {
  border-top: 1px solid var(--color-border);
  padding-top: var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
}

.tags-label {
  color: var(--color-text-secondary);
  margin-right: var(--spacing-sm);
}

.original-source {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
}

/* Pagination */
.pagination {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: var(--spacing-2xl);
  padding-top: var(--spacing-lg);
  border-top: 1px solid var(--color-border);
}

.pagination-link {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-sm);
  background-color: var(--color-bg-secondary);
  color: var(--color-text);
  transition: background-color 0.2s ease;
}

.pagination-link:hover:not(.disabled) {
  background-color: var(--color-accent);
  color: white;
}

.pagination-link.disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.pagination-info {
  color: var(--color-text-secondary);
  font-size: 0.9rem;
}

/* Search Page */
.search-page h1 {
  margin-bottom: var(--spacing-lg);
}

.search-box {
  display: flex;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-lg);
}

#search-input {
  flex: 1;
  padding: var(--spacing-md);
  font-size: 1rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background-color: var(--color-bg);
  color: var(--color-text);
}

#search-input:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(67, 97, 238, 0.2);
}

#search-button {
  padding: var(--spacing-md);
  background-color: var(--color-accent);
  color: white;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: background-color 0.2s ease;
}

#search-button:hover {
  background-color: var(--color-accent-hover);
}

.search-status {
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-lg);
}

/* Footer */
.site-footer {
  background-color: var(--color-bg-secondary);
  border-top: 1px solid var(--color-border);
  margin-top: auto;
}

.footer-content {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--spacing-xl) var(--spacing-lg);
  text-align: center;
  color: var(--color-text-secondary);
  font-size: 0.9rem;
}

.footer-content p {
  margin-bottom: var(--spacing-xs);
}

/* Mobile Responsiveness */
@media (max-width: 640px) {
  .nav-container {
    flex-direction: column;
    gap: var(--spacing-sm);
  }

  .nav-links {
    gap: var(--spacing-md);
  }

  .article-header h1 {
    font-size: 1.5rem;
  }

  .pagination {
    flex-direction: column;
    gap: var(--spacing-md);
  }

  .pagination-info {
    order: -1;
  }
}