/* AI Tools Pricing - Dark Theme */
:root {
  --bg-primary: #0a0a1a;
  --bg-secondary: #14142b;
  --bg-card: #1a1a3a;
  --bg-hover: #222244;
  --text-primary: #e8e8f0;
  --text-secondary: #a8a8c0;
  --text-muted: #6868808;
  --accent: #3b82f6;
  --accent-hover: #2563eb;
  --accent-light: #60a5fa;
  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;
  --border: #2a2a4a;
  --border-hover: #3a3a5a;
  --shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
  --radius: 8px;
  --radius-sm: 4px;
  --max-width: 1280px;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body.rtl { direction: rtl; }

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

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

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

.skip-link {
  position: absolute;
  top: -40px;
  left: 0;
  background: var(--accent);
  color: white;
  padding: 0.5rem 1rem;
  z-index: 1000;
  border-radius: 0 0 var(--radius-sm) 0;
}
.skip-link:focus { top: 0; }

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

.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 1rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.site-logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.site-logo .logo-icon {
  width: 32px;
  height: 32px;
  background: linear-gradient(135deg, var(--accent), var(--accent-light));
  border-radius: var(--radius-sm);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: bold;
}

.main-nav {
  display: flex;
  gap: 1.5rem;
  align-items: center;
}

.main-nav a {
  color: var(--text-secondary);
  font-weight: 500;
  padding: 0.5rem 0.75rem;
  border-radius: var(--radius-sm);
  transition: all 0.2s;
}

.main-nav a:hover,
.main-nav a.active {
  color: var(--text-primary);
  background: var(--bg-hover);
  text-decoration: none;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

/* Search box in header */
.header-search {
  position: relative;
  min-width: 200px;
}

.header-search input {
  width: 100%;
  padding: 0.5rem 2.5rem 0.5rem 0.75rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text-primary);
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  transition: border-color 0.2s;
}

.header-search input:focus {
  outline: none;
  border-color: var(--accent);
}

.header-search::before {
  content: "🔍";
  position: absolute;
  right: 0.75rem;
  top: 50%;
  transform: translateY(-50%);
  pointer-events: none;
}

/* Language switcher */
.lang-switcher {
  position: relative;
}

.lang-btn {
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text-primary);
  padding: 0.5rem 0.75rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 0.9rem;
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.lang-btn:hover { border-color: var(--accent); }

.lang-dropdown {
  position: absolute;
  top: 100%;
  right: 0;
  margin-top: 0.5rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  min-width: 180px;
  max-height: 400px;
  overflow-y: auto;
  display: none;
  z-index: 200;
}

.lang-dropdown.open { display: block; }

.lang-dropdown a {
  display: block;
  padding: 0.5rem 1rem;
  color: var(--text-primary);
  font-size: 0.9rem;
  border-bottom: 1px solid var(--border);
}

.lang-dropdown a:last-child { border-bottom: none; }

.lang-dropdown a:hover {
  background: var(--bg-hover);
  text-decoration: none;
}

.lang-dropdown a.active {
  background: var(--accent);
  color: white;
}

/* Hamburger menu (mobile) */
.menu-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: 1.5rem;
  cursor: pointer;
  padding: 0.25rem;
}

/* Hero section */
.hero {
  text-align: center;
  padding: 4rem 1.5rem 3rem;
  background: linear-gradient(180deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);
}

.hero h1 {
  font-size: 2.5rem;
  margin-bottom: 1rem;
  background: linear-gradient(135deg, var(--accent-light), var(--accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero p {
  font-size: 1.2rem;
  color: var(--text-secondary);
  margin-bottom: 2rem;
}

.hero-search {
  max-width: 600px;
  margin: 0 auto;
  position: relative;
}

.hero-search input {
  width: 100%;
  padding: 1rem 3rem 1rem 1.5rem;
  font-size: 1.1rem;
  background: var(--bg-card);
  border: 2px solid var(--border);
  color: var(--text-primary);
  border-radius: var(--radius);
  transition: border-color 0.2s;
}

.hero-search input:focus {
  outline: none;
  border-color: var(--accent);
}

.hero-search button {
  position: absolute;
  right: 0.5rem;
  top: 50%;
  transform: translateY(-50%);
  background: var(--accent);
  color: white;
  border: none;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-weight: 600;
}

.hero-search button:hover { background: var(--accent-hover); }

/* Quick categories */
.quick-categories {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.75rem;
  margin-top: 2rem;
}

.quick-categories a {
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text-primary);
  padding: 0.5rem 1rem;
  border-radius: 999px;
  font-size: 0.9rem;
  transition: all 0.2s;
}

.quick-categories a:hover {
  border-color: var(--accent);
  background: var(--bg-hover);
  text-decoration: none;
}

/* Section */
.section {
  padding: 2rem 0;
}

.section-title {
  font-size: 1.75rem;
  margin-bottom: 1.5rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--border);
}

/* Grid */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.5rem;
}

/* Tool card */
.tool-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  transition: all 0.2s;
  display: flex;
  flex-direction: column;
}

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

.tool-card-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.tool-icon {
  width: 48px;
  height: 48px;
  background: linear-gradient(135deg, var(--accent), var(--accent-light));
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: bold;
  font-size: 1.25rem;
}

.tool-name {
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--text-primary);
}

.tool-vendor {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.tool-description {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin-bottom: 1rem;
  flex-grow: 1;
}

.tool-pricing {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
}

.price-range {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--success);
}

.free-tier-badge {
  background: var(--success);
  color: white;
  padding: 0.25rem 0.5rem;
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  font-weight: 600;
}

.btn {
  display: inline-block;
  background: var(--accent);
  color: white;
  padding: 0.6rem 1.2rem;
  border-radius: var(--radius-sm);
  font-weight: 600;
  text-decoration: none;
  transition: background 0.2s;
  border: none;
  cursor: pointer;
  font-size: 0.95rem;
}

.btn:hover {
  background: var(--accent-hover);
  color: white;
  text-decoration: none;
}

.btn-secondary {
  background: var(--bg-hover);
  border: 1px solid var(--border);
}

.btn-secondary:hover {
  background: var(--border-hover);
}

/* Single page */
.article-header {
  margin-bottom: 2rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border);
}

.article-title {
  font-size: 2rem;
  margin-bottom: 0.5rem;
}

.article-meta {
  color: var(--text-secondary);
  font-size: 0.9rem;
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.article-content {
  line-height: 1.8;
  font-size: 1.05rem;
}

.article-content h2 {
  margin-top: 2rem;
  margin-bottom: 1rem;
  font-size: 1.5rem;
}

.article-content h3 {
  margin-top: 1.5rem;
  margin-bottom: 0.75rem;
  font-size: 1.25rem;
}

.article-content p { margin-bottom: 1rem; }

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

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

.article-content code {
  background: var(--bg-card);
  padding: 0.15rem 0.4rem;
  border-radius: var(--radius-sm);
  font-size: 0.9em;
}

.article-content pre {
  background: var(--bg-card);
  padding: 1rem;
  border-radius: var(--radius);
  overflow-x: auto;
  margin-bottom: 1rem;
}

.article-content table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 1rem;
}

.article-content th, .article-content td {
  padding: 0.75rem;
  border: 1px solid var(--border);
  text-align: left;
}

.article-content th {
  background: var(--bg-card);
  font-weight: 600;
}

/* Breadcrumb */
.breadcrumb {
  margin-bottom: 1.5rem;
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.breadcrumb ol {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.breadcrumb li::after {
  content: "/";
  margin-left: 0.5rem;
  color: var(--text-muted);
}

.breadcrumb li:last-child::after { content: ""; }

.breadcrumb a { color: var(--text-secondary); }
.breadcrumb a:hover { color: var(--accent-light); }

/* Pagination */
.pagination {
  margin-top: 2rem;
  display: flex;
  justify-content: center;
  gap: 0.5rem;
  list-style: none;
}

.pagination a, .pagination span {
  padding: 0.5rem 0.75rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  text-decoration: none;
}

.pagination .active a {
  background: var(--accent);
  border-color: var(--accent);
  color: white;
}

/* Footer */
.site-footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
  padding: 2rem 0 1rem;
  margin-top: 3rem;
}

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 2rem;
}

.footer-section h4 {
  color: var(--text-primary);
  margin-bottom: 1rem;
  font-size: 1rem;
}

.footer-section ul {
  list-style: none;
}

.footer-section li {
  margin-bottom: 0.5rem;
}

.footer-section a {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.footer-bottom {
  max-width: var(--max-width);
  margin: 2rem auto 0;
  padding: 1rem 1.5rem;
  border-top: 1px solid var(--border);
  text-align: center;
  color: var(--text-muted);
  font-size: 0.85rem;
}

.disclaimer {
  background: var(--bg-card);
  border-left: 4px solid var(--warning);
  padding: 0.75rem 1rem;
  margin: 1rem 0;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  color: var(--text-secondary);
}

/* Responsive */
@media (max-width: 768px) {
  .menu-toggle { display: block; }

  .main-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--bg-secondary);
    flex-direction: column;
    padding: 1rem;
    border-bottom: 1px solid var(--border);
    display: none;
  }

  .main-nav.open { display: flex; }

  .header-search { display: none; }

  .hero h1 { font-size: 1.75rem; }
  .hero p { font-size: 1rem; }

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

  .article-title { font-size: 1.5rem; }
}

/* RTL support */
body.rtl .header-search input {
  padding: 0.5rem 0.75rem 0.5rem 2.5rem;
}

body.rtl .header-search::before {
  right: auto;
  left: 0.75rem;
}

body.rtl .breadcrumb ol {
  padding-left: 0;
  padding-right: 0;
}

body.rtl .article-content ul,
body.rtl .article-content ol {
  padding-left: 0;
  padding-right: 2rem;
}