:root {
  --bg: #fafafa;
  --surface: #ffffff;
  --surface-elevated: #ffffff;
  --border: #e5e7eb;
  --border-light: #f3f4f6;
  --text-primary: #111827;
  --text-secondary: #6b7280;
  --text-tertiary: #9ca3af;
  --accent: #0f172a;
  --accent-light: #1e293b;
  --accent-blue: #2563eb;
  --accent-blue-light: #3b82f6;
  --accent-green: #059669;
  --accent-orange: #ea580c;
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow: 0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px rgb(0 0 0 / 0.1);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
  --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
  --radius-sm: 6px;
  --radius: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme="dark"] {
  --bg: #0a0a0a;
  --surface: #111111;
  --surface-elevated: #1a1a1a;
  --border: #262626;
  --border-light: #1a1a1a;
  --text-primary: #fafafa;
  --text-secondary: #a3a3a3;
  --text-tertiary: #737373;
  --accent: #f5f5f5;
  --accent-light: #e5e5e5;
  --accent-blue: #3b82f6;
  --accent-blue-light: #60a5fa;
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.3);
  --shadow: 0 1px 3px 0 rgb(0 0 0 / 0.4), 0 1px 2px -1px rgb(0 0 0 / 0.4);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.4), 0 2px 4px -2px rgb(0 0 0 / 0.4);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.4), 0 4px 6px -4px rgb(0 0 0 / 0.4);
  --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.5), 0 8px 10px -6px rgb(0 0 0 / 0.5);
}

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: 'Cairo', 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  transition: background 0.3s, color 0.3s;
}

/* Scrollbar */
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-tertiary); }

/* Navigation */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  background: rgba(250, 250, 250, 0.8);
  backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid var(--border-light);
  transition: var(--transition);
}
[data-theme="dark"] .nav {
  background: rgba(10, 10, 10, 0.8);
  border-bottom-color: var(--border);
}
.nav-container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.nav-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
}
.nav-logo-asset {
  width: 46px;
  height: 46px;
  display: block;
  object-fit: contain;
  flex: 0 0 auto;
}
.nav-logo-text {
  font-family: 'Inter', sans-serif;
  font-size: clamp(1.05rem, 1.8vw, 1.35rem);
  font-weight: 800;
  color: var(--text-primary);
  letter-spacing: -0.5px;
  line-height: 1;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 8px;
}
.nav-link {
  padding: 8px 14px;
  border-radius: var(--radius);
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  transition: var(--transition);
  font-family: 'Inter', sans-serif;
}
.nav-link:hover {
  color: var(--text-primary);
  background: var(--border-light);
}
.nav-link.active { color: var(--accent-blue); }
.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}
.icon-btn {
  width: 36px; height: 36px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text-secondary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}
.icon-btn:hover {
  background: var(--border-light);
  color: var(--text-primary);
}
.lang-btn {
  padding: 8px 16px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text-primary);
  font-family: 'Inter', sans-serif;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  white-space: nowrap;
}
.lang-btn:hover {
  border-color: var(--text-tertiary);
  background: var(--border-light);
}

/* Hero */
.hero {
  padding: 140px 24px 80px;
  text-align: center;
  max-width: 800px;
  margin: 0 auto;
}
.hero-brand {
  display: inline-flex;
  align-items: center;
  margin-bottom: 18px;
}
.hero-brand-text {
  font-size: clamp(1.7rem, 4.2vw, 3.2rem);
  font-weight: 900;
  letter-spacing: 0.02em;
  color: var(--text-primary);
  font-family: 'Inter', sans-serif;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 50px;
  font-size: 0.85rem;
  color: var(--text-secondary);
  font-weight: 500;
  margin-top: 22px;
  font-family: 'Inter', sans-serif;
}
.hero-badge-dot {
  width: 6px; height: 6px;
  background: var(--accent-green);
  border-radius: 50%;
  animation: pulse 2s infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}
.hero-title {
  font-size: clamp(1.6rem, 4.5vw, 3.4rem);
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 20px;
  letter-spacing: -1px;
  white-space: nowrap;
}
[data-lang="ar"] .hero-title { letter-spacing: 0; }
.hero-title .gradient {
  background: linear-gradient(135deg, var(--accent-blue), var(--accent-blue-light));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.hero-subtitle {
  font-size: 1.15rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto 40px;
  line-height: 1.7;
}

/* Search Box */
.search-container {
  max-width: 680px;
  margin: 0 auto 60px;
  padding: 0 24px;
}
.search-box {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 6px;
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  gap: 4px;
  transition: var(--transition);
}
.search-box:focus-within {
  border-color: var(--accent-blue);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1), var(--shadow-lg);
}
.search-icon {
  width: 44px; height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-tertiary);
  flex-shrink: 0;
}
.search-input {
  flex: 1;
  border: none;
  background: transparent;
  padding: 12px 8px;
  font-size: 1rem;
  color: var(--text-primary);
  font-family: inherit;
  outline: none;
  min-width: 0;
}
.search-input::placeholder { color: var(--text-tertiary); }
.search-kbd {
  padding: 4px 10px;
  background: var(--border-light);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  color: var(--text-tertiary);
  font-family: 'Inter', sans-serif;
  margin: 0 8px;
  white-space: nowrap;
}

/* Stats Bar */
.stats-bar {
  max-width: 900px;
  margin: 0 auto 60px;
  padding: 0 24px;
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}
.stat-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
  text-align: center;
  transition: var(--transition);
}
.stat-card:hover {
  border-color: var(--text-tertiary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}
.stat-value {
  font-family: 'Inter', sans-serif;
  font-size: 2rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1;
  margin-bottom: 8px;
}
.stat-label {
  font-size: 0.85rem;
  color: var(--text-secondary);
  font-weight: 500;
}

/* Filters */
.filters-section {
  max-width: 900px;
  margin: 0 auto 24px;
  padding: 0 24px;
}
.filters-scroll {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 8px;
  scrollbar-width: none;
}
.filters-scroll::-webkit-scrollbar { display: none; }
.filter-chip {
  padding: 8px 18px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 50px;
  color: var(--text-secondary);
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
  white-space: nowrap;
  font-family: 'Inter', sans-serif;
}
.filter-chip:hover {
  border-color: var(--text-tertiary);
  color: var(--text-primary);
}
.filter-chip.active {
  background: var(--accent-blue);
  color: white;
  border-color: var(--accent-blue);
}
[data-theme="dark"] .filter-chip.active {
  background: var(--accent-blue);
  border-color: var(--accent-blue);
}
.filter-chip.active:hover {
  background: var(--accent-blue-light);
  border-color: var(--accent-blue-light);
  color: white;
}

/* Results */
.results-section {
  max-width: 900px;
  margin: 0 auto;
  padding: 0 24px 80px;
}
.results-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
  padding: 0 4px;
  gap: 12px;
  flex-wrap: wrap;
}
.results-count {
  font-size: 0.9rem;
  color: var(--text-secondary);
  font-weight: 500;
}
.results-count strong {
  color: var(--text-primary);
  font-family: 'Inter', sans-serif;
}
.results-sort {
  font-size: 0.85rem;
  color: var(--text-tertiary);
}

.term-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.term-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 24px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}
.term-item::before {
  content: '';
  position: absolute;
  top: 0; right: 0;
  width: 3px; height: 100%;
  background: linear-gradient(180deg, var(--accent-blue), var(--accent-blue-light));
  opacity: 0;
  transition: opacity 0.2s;
}
[dir="ltr"] .term-item::before { right: auto; left: 0; }
.term-item:hover {
  border-color: var(--accent-blue);
  box-shadow: var(--shadow-md);
  transform: translateX(-2px);
}
.term-item:hover::before { opacity: 1; }
[dir="ltr"] .term-item:hover { transform: translateX(2px); }

.term-item-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 12px;
  gap: 16px;
}
.term-item-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 4px;
}
.term-item-en {
  font-family: 'Inter', sans-serif;
  font-size: 0.95rem;
  color: var(--text-secondary);
  font-weight: 500;
}
.term-item-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}
.term-badge {
  padding: 4px 12px;
  background: var(--border-light);
  border: 1px solid var(--border);
  border-radius: 50px;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-secondary);
  font-family: 'Inter', sans-serif;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.term-id {
  font-family: 'Inter', monospace;
  font-size: 0.8rem;
  color: var(--text-tertiary);
  font-weight: 500;
}
.term-item-body {
  display: grid;
  gap: 8px;
}
.term-def-ar {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.7;
}
.term-def-en {
  font-size: 0.85rem;
  color: var(--text-tertiary);
  line-height: 1.6;
  font-style: italic;
}
.term-item-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid var(--border-light);
}
.term-source {
  font-size: 0.8rem;
  color: var(--text-tertiary);
  font-family: 'Inter', sans-serif;
}
.term-source strong { color: var(--accent-orange); }
.term-actions {
  display: flex;
  gap: 8px;
}
.term-action-btn {
  padding: 6px 12px;
  border: 1px solid var(--border);
  background: var(--surface);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-size: 0.8rem;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
  font-family: 'Inter', sans-serif;
  display: flex;
  align-items: center;
  gap: 6px;
}
.term-action-btn:hover {
  border-color: var(--accent-blue);
  color: var(--accent-blue);
  background: rgba(37, 99, 235, 0.05);
}

/* Loading */
.loading-state {
  text-align: center;
  padding: 80px 20px;
}
.loading-spinner {
  width: 40px; height: 40px;
  border: 3px solid var(--border);
  border-top-color: var(--accent-blue);
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin: 0 auto 20px;
}
@keyframes spin { to { transform: rotate(360deg); } }
.loading-text {
  color: var(--text-secondary);
  font-size: 0.95rem;
}
.results-count.is-loading {
  color: var(--text-secondary);
}
.skeleton-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px;
  margin-bottom: 12px;
  animation: pulse 1.4s ease-in-out infinite;
}
.skeleton-line {
  height: 12px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--border) 25%, var(--border-light) 50%, var(--border) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s linear infinite;
  margin-bottom: 10px;
}
.skeleton-line-lg {
  width: 55%;
  height: 16px;
}
@keyframes shimmer {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}
@keyframes pulse {
  0%, 100% { opacity: 0.9; }
  50% { opacity: 0.6; }
}

/* Empty */
.empty-state {
  text-align: center;
  padding: 80px 20px;
}
.empty-icon {
  width: 64px; height: 64px;
  margin: 0 auto 20px;
  background: var(--border-light);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.8rem;
}
.empty-title {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 8px;
}
.empty-desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
}

/* Floating Action Button */
.fab {
  position: fixed;
  bottom: 32px;
  inset-inline-start: 32px;
  width: 56px; height: 56px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent-blue), var(--accent-blue-light));
  color: white;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  box-shadow: var(--shadow-xl);
  transition: var(--transition);
  z-index: 90;
  display: flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
}
.fab:hover {
  transform: scale(1.1) rotate(90deg);
  background: var(--accent-blue);
  color: white;
}

/* Prose (wiki / api pages) */
.prose {
  max-width: 900px;
  margin: 0 auto;
  padding: 100px 24px 80px;
}
.prose h1 {
  font-size: 2.2rem;
  font-weight: 800;
  letter-spacing: -1px;
  margin-bottom: 12px;
}
[data-lang="ar"] .prose h1 { letter-spacing: 0; }
.prose h2 {
  font-size: 1.4rem;
  font-weight: 700;
  margin: 32px 0 12px;
}
.prose h3 { font-size: 1.05rem; font-weight: 700; margin: 20px 0 8px; }
.prose p { margin: 10px 0; color: var(--text-secondary); }
.prose ul, .prose ol { margin: 10px 0 10px 0; padding-inline-start: 24px; color: var(--text-secondary); }
.prose li { margin: 6px 0; }
.prose a { color: var(--accent-blue); text-decoration: none; }
.prose a:hover { text-decoration: underline; }

.prose code, .prose .mono {
  font-family: 'Inter', 'Consolas', monospace;
  background: var(--border-light);
  border: 1px solid var(--border);
  border-radius: 5px;
  padding: 1px 6px;
  font-size: 0.85em;
  direction: ltr;
  unicode-bidi: embed;
}

pre.codeblock {
  direction: ltr;
  text-align: left;
  background: var(--accent);
  color: #e2e8f0;
  padding: 16px 20px;
  border-radius: var(--radius-md);
  overflow-x: auto;
  font-family: 'Inter', 'Consolas', monospace;
  font-size: 0.85rem;
  line-height: 1.7;
  margin: 14px 0;
}
[data-theme="dark"] pre.codeblock { background: #000; border: 1px solid var(--border); }

.tablewrap { overflow-x: auto; margin: 14px 0; }
table {
  border-collapse: collapse;
  width: 100%;
  font-size: 0.9rem;
  background: var(--surface);
}
th, td {
  border: 1px solid var(--border);
  padding: 10px 12px;
  text-align: start;
  vertical-align: top;
}
th { background: var(--border-light); font-weight: 600; }
td code { white-space: nowrap; }

/* Footer */
.footer {
  border-top: 1px solid var(--border);
  padding: 40px 24px;
  margin-top: auto;
}
.footer-container {
  max-width: 900px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
}
.footer-left {
  display: flex;
  align-items: center;
  gap: 20px;
}
.footer-brand {
  display: flex;
  align-items: center;
  gap: 8px;
  text-decoration: none;
}
.footer-logo {
  width: 24px; height: 24px;
  background: linear-gradient(135deg, var(--accent-blue), var(--accent-blue-light));
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: 800;
  font-size: 0.7rem;
  font-family: 'Inter', sans-serif;
}
.footer-brand-text {
  font-family: 'Inter', sans-serif;
  font-weight: 700;
  color: var(--text-primary);
  font-size: 0.95rem;
}
.footer-copy {
  font-size: 0.85rem;
  color: var(--text-tertiary);
}
.footer-right {
  display: flex;
  gap: 20px;
}
.footer-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.85rem;
  font-weight: 500;
  transition: var(--transition);
  font-family: 'Inter', sans-serif;
}
.footer-link:hover { color: var(--text-primary); }

/* Responsive */
@media (max-width: 768px) {
  .nav-links { display: none; }
  .nav-container { padding: 0 16px; }
  .hero { padding: 120px 20px 60px; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .term-item-header { flex-direction: column; }
  .term-item-meta { width: 100%; justify-content: flex-start; }
  .term-item-footer { flex-direction: column; gap: 12px; align-items: flex-start; }
  .footer-container { flex-direction: column; text-align: center; }
  .fab { width: 48px; height: 48px; bottom: 20px; inset-inline-start: 20px; }
  .prose { padding: 90px 16px 60px; }
}