:root {
  /* Premium Color Palette */
  --primary: #6366f1;
  --primary-dark: #4f46e5;
  --primary-light: #818cf8;
  --accent: #f59e0b;
  --accent-dark: #d97706;

  /* Gradients */
  --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --gradient-warm: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
  --gradient-cool: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
  --gradient-dark: linear-gradient(135deg, #1e1e2e 0%, #2d2d44 100%);

  /* Neutrals */
  --bg-primary: #0f0f1e;
  --bg-secondary: #1a1a2e;
  --bg-tertiary: #252541;
  --bg-card: rgba(255, 255, 255, 0.05);
  --text-primary: #ffffff;
  --text-secondary: #b4b4c8;
  --text-muted: #7e7e9a;

  /* Effects */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.2);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.3);
  --shadow-glow: 0 0 20px rgba(99, 102, 241, 0.3);

  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;

  /* Border Radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;

  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-base: 0.3s ease;
  --transition-slow: 0.5s ease;
}

/* Reset & Base */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
}

/* Typography */
h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: 'Outfit', 'Inter', sans-serif;
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: var(--spacing-sm);
}

h1 {
  font-size: clamp(2rem, 5vw, 3.5rem);
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

h2 {
  font-size: clamp(1.5rem, 4vw, 2.5rem);
  color: var(--text-primary);
}

h3 {
  font-size: clamp(1.25rem, 3vw, 1.75rem);
  color: var(--text-primary);
}

p {
  color: var(--text-secondary);
  margin-bottom: var(--spacing-md);
}

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

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

/* Container */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

/* Navigation */
.navbar {
  background: rgba(26, 26, 46, 0.8);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  padding: var(--spacing-md) 0;
  position: sticky;
  top: 0;
  z-index: 1000;
  transition: all var(--transition-base);
}

.navbar.scrolled {
  box-shadow: var(--shadow-md);
  background: rgba(26, 26, 46, 0.95);
}

.nav-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--spacing-lg);
}

.logo {
  font-size: 1.5rem;
  font-weight: 800;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -0.5px;
  white-space: nowrap;
}

.nav-links {
  display: flex;
  gap: var(--spacing-lg);
  list-style: none;
}

.nav-links a {
  color: var(--text-secondary);
  font-weight: 500;
  transition: all var(--transition-fast);
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient-primary);
  transition: width var(--transition-base);
}

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

.nav-links a:hover::after {
  width: 100%;
}

/* Filter Chips */
.filters {
  display: flex;
  gap: var(--spacing-sm);
  justify-content: flex-end;
  flex-wrap: wrap;
  margin: 0;
  flex: 1;
}

/* Hero Section */
.hero {
  padding: var(--spacing-xl) 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, rgba(99, 102, 241, 0.1) 0%, transparent 70%);
  animation: pulse 8s ease-in-out infinite;
}

@keyframes pulse {

  0%,
  100% {
    transform: scale(1);
    opacity: 0.5;
  }

  50% {
    transform: scale(1.1);
    opacity: 0.8;
  }
}

.hero-content {
  position: relative;
  z-index: 1;
}

.hero h1 {
  margin-bottom: var(--spacing-md);
}

.hero p {
  font-size: 1.25rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto var(--spacing-lg);
}

/* Filter Chips */
.filters {
  display: flex;
  gap: var(--spacing-sm);
  justify-content: center;
  flex-wrap: wrap;
  margin: var(--spacing-xl) 0;
}

.chip {
  padding: 8px var(--spacing-md);
  background: var(--bg-card);
  border: 2px solid rgba(99, 102, 241, 0.2);
  border-radius: var(--radius-lg);
  color: var(--text-secondary);
  font-weight: 500;
  font-size: 0.875rem;
  cursor: pointer;
  transition: all var(--transition-fast);
  backdrop-filter: blur(10px);
  white-space: nowrap;
}

.chip:hover {
  border-color: var(--primary);
  background: rgba(99, 102, 241, 0.1);
  transform: translateY(-2px);
}

.chip.active {
  background: var(--gradient-primary);
  border-color: transparent;
  color: white;
  box-shadow: var(--shadow-glow);
}

/* Search Bar */
.search-container {
  max-width: 600px;
  margin: 0 auto var(--spacing-xl);
  position: relative;
}

.search-bar {
  width: 100%;
  padding: var(--spacing-md) var(--spacing-lg);
  background: var(--bg-card);
  border: 2px solid rgba(99, 102, 241, 0.2);
  border-radius: var(--radius-lg);
  color: var(--text-primary);
  font-size: 1rem;
  backdrop-filter: blur(10px);
  transition: all var(--transition-fast);
}

.search-bar:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: var(--shadow-glow);
}

.search-bar::placeholder {
  color: var(--text-muted);
}

/* Article Grid */
.articles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
  gap: var(--spacing-lg);
  padding: var(--spacing-lg) 0;
}

/* Article Card */
.article-card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--transition-base);
  border: 1px solid rgba(255, 255, 255, 0.05);
  backdrop-filter: blur(10px);
  cursor: pointer;
  position: relative;
}

.article-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--gradient-primary);
  opacity: 0;
  transition: opacity var(--transition-base);
  z-index: 0;
}

.article-card:hover::before {
  opacity: 0.05;
}

.article-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(99, 102, 241, 0.3);
}

.article-image {
  width: 100%;
  height: 220px;
  object-fit: cover;
  position: relative;
  z-index: 1;
}

.article-content {
  padding: var(--spacing-md);
  position: relative;
  z-index: 1;
}

.article-category {
  display: inline-block;
  padding: 4px 12px;
  background: var(--gradient-primary);
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: var(--spacing-sm);
}

.article-title {
  font-size: 1.5rem;
  margin-bottom: var(--spacing-sm);
  color: var(--text-primary);
  line-height: 1.3;
}

.article-excerpt {
  color: var(--text-secondary);
  margin-bottom: var(--spacing-md);
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.article-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--text-muted);
  font-size: 0.875rem;
  padding-top: var(--spacing-sm);
  border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.article-author {
  font-weight: 500;
  color: var(--text-secondary);
}

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

/* Button */
.btn {
  padding: var(--spacing-sm) var(--spacing-lg);
  background: var(--gradient-primary);
  color: white;
  border: none;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
  transition: all var(--transition-fast);
  box-shadow: var(--shadow-md);
}

.btn:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg), var(--shadow-glow);
}

.btn-secondary {
  background: var(--bg-card);
  color: var(--text-primary);
  border: 2px solid rgba(99, 102, 241, 0.3);
}

.btn-secondary:hover {
  background: rgba(99, 102, 241, 0.1);
  border-color: var(--primary);
}

/* Form Elements */
.form-group {
  margin-bottom: var(--spacing-md);
}

.form-label {
  display: block;
  margin-bottom: var(--spacing-xs);
  color: var(--text-primary);
  font-weight: 500;
}

.form-input,
.form-textarea,
.form-select {
  width: 100%;
  padding: var(--spacing-sm) var(--spacing-md);
  background: var(--bg-card);
  border: 2px solid rgba(99, 102, 241, 0.2);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: 1rem;
  font-family: inherit;
  transition: all var(--transition-fast);
  backdrop-filter: blur(10px);
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: var(--shadow-glow);
}

.form-textarea {
  min-height: 150px;
  resize: vertical;
}

/* Article Detail Page */
.article-header {
  text-align: center;
  padding: var(--spacing-xl) 0;
  max-width: 800px;
  margin: 0 auto;
}

.article-header h1 {
  margin-bottom: var(--spacing-md);
}

.article-featured-image {
  width: 100%;
  max-height: 500px;
  object-fit: cover;
  border-radius: var(--radius-lg);
  margin: var(--spacing-lg) 0;
  box-shadow: var(--shadow-lg);
}

.article-body {
  max-width: 800px;
  margin: 0 auto;
  padding: var(--spacing-lg) 0;
  font-size: 1.125rem;
  line-height: 1.8;
}

.article-body h2 {
  margin-top: var(--spacing-xl);
  margin-bottom: var(--spacing-md);
  color: var(--text-primary);
}

.article-body p {
  margin-bottom: var(--spacing-md);
  color: var(--text-secondary);
}

/* Admin Panel */
.admin-container {
  max-width: 900px;
  margin: var(--spacing-xl) auto;
  padding: var(--spacing-lg);
}

.admin-header {
  text-align: center;
  margin-bottom: var(--spacing-xl);
}

.admin-tabs {
  display: flex;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-lg);
  border-bottom: 2px solid rgba(255, 255, 255, 0.1);
}

.tab {
  padding: var(--spacing-sm) var(--spacing-lg);
  background: transparent;
  border: none;
  color: var(--text-secondary);
  font-weight: 600;
  cursor: pointer;
  border-bottom: 3px solid transparent;
  transition: all var(--transition-fast);
}

.tab:hover {
  color: var(--text-primary);
}

.tab.active {
  color: var(--primary-light);
  border-bottom-color: var(--primary);
}

.admin-section {
  background: var(--bg-card);
  padding: var(--spacing-lg);
  border-radius: var(--radius-lg);
  border: 1px solid rgba(255, 255, 255, 0.05);
  backdrop-filter: blur(10px);
}

.article-list-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-md);
  background: var(--bg-secondary);
  border-radius: var(--radius-md);
  margin-bottom: var(--spacing-sm);
  border: 1px solid rgba(255, 255, 255, 0.05);
}

.article-list-info h3 {
  font-size: 1.125rem;
  margin-bottom: 4px;
}

.article-list-meta {
  font-size: 0.875rem;
  color: var(--text-muted);
}

.article-actions {
  display: flex;
  gap: var(--spacing-sm);
}

.btn-small {
  padding: 6px 16px;
  font-size: 0.875rem;
}

.btn-danger {
  background: linear-gradient(135deg, #f5576c 0%, #d32f2f 100%);
}

.btn-danger:hover {
  box-shadow: 0 0 20px rgba(245, 87, 108, 0.4);
}

/* Loading State */
.loading {
  text-align: center;
  padding: var(--spacing-xl);
  color: var(--text-muted);
  font-size: 1.125rem;
}

.spinner {
  width: 50px;
  height: 50px;
  border: 4px solid rgba(99, 102, 241, 0.2);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin: 0 auto var(--spacing-md);
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

/* Empty State */
.empty-state {
  text-align: center;
  padding: var(--spacing-xl);
  color: var(--text-muted);
}

.empty-state h3 {
  margin-bottom: var(--spacing-sm);
  color: var(--text-secondary);
}

/* Footer */
.footer {
  background: var(--bg-secondary);
  padding: var(--spacing-xl) 0;
  margin-top: var(--spacing-xl);
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  text-align: center;
}

.footer p {
  color: var(--text-muted);
  margin: 0;
}

/* Responsive */
@media (max-width: 768px) {
  .nav-content {
    flex-wrap: wrap;
  }

  .filters {
    width: 100%;
    justify-content: center;
    margin-top: var(--spacing-sm);
  }

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

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

  .filters {
    gap: var(--spacing-xs);
  }

  .chip {
    font-size: 0.875rem;
    padding: 6px var(--spacing-sm);
  }

  .article-header,
  .article-body,
  .admin-container {
    padding: var(--spacing-md);
  }
}

/* Utility Classes */
.hidden {
  display: none !important;
}

.text-center {
  text-align: center;
}

.mt-sm {
  margin-top: var(--spacing-sm);
}

.mt-md {
  margin-top: var(--spacing-md);
}

.mt-lg {
  margin-top: var(--spacing-lg);
}

.mt-xl {
  margin-top: var(--spacing-xl);
}

.mb-sm {
  margin-bottom: var(--spacing-sm);
}

.mb-md {
  margin-bottom: var(--spacing-md);
}

.mb-lg {
  margin-bottom: var(--spacing-lg);
}

.mb-xl {
  margin-bottom: var(--spacing-xl);
}
/* Related Posts Section */
.related-posts-section {
  margin-top: var(--spacing-xl);
  padding-top: var(--spacing-xl);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.related-posts-section h3 {
  margin-bottom: var(--spacing-lg);
  font-size: 1.5rem;
  color: var(--text-primary);
}

.related-posts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--spacing-md);
}

.related-post-card {
  display: block;
  background: var(--bg-card);
  border: 1px solid rgba(255, 255, 255, 0.05);
  border-radius: var(--radius-md);
  padding: var(--spacing-md);
  transition: all var(--transition-fast);
  text-decoration: none;
}

.related-post-card:hover {
  transform: translateY(-4px);
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(99, 102, 241, 0.3);
}

.related-post-content h4 {
  font-size: 1.1rem;
  margin-bottom: var(--spacing-sm);
  color: var(--text-primary);
  line-height: 1.4;
}

.read-more {
  font-size: 0.9rem;
  color: var(--primary-light);
  font-weight: 500;
}