:root {
  --bg-color: #09090b; /* zinc-950 */
  --text-primary: #f4f4f5; /* zinc-100 */
  --text-secondary: #a1a1aa; /* zinc-400 */
  --text-muted: #71717a; /* zinc-500 */
  --border-color: #27272a; /* zinc-800 */
  
  --primary: #4f46e5; /* indigo-600 */
  --primary-hover: #4338ca; /* indigo-700 */
  --primary-light: #818cf8; /* indigo-400 */
  
  --card-bg: rgba(24, 24, 27, 0.6); /* zinc-900/60 */
  --card-border: rgba(63, 63, 70, 0.5); /* zinc-700/50 */
  --card-hover-border: rgba(99, 102, 241, 0.5); /* indigo-500/50 */
  --card-hover-bg: rgba(39, 39, 42, 0.8); /* zinc-800/80 */
}

body {
  margin: 0;
  font-family: 'Google Sans', 'Inter', sans-serif;
  background-color: var(--bg-color);
  color: var(--text-primary);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Utilities */
.container {
  max-width: 80rem;
  width: 100%;
  margin-left: auto;
  margin-right: auto;
  padding-left: 1rem;
  padding-right: 1rem;
  box-sizing: border-box;
}

/* Navbar */
.navbar {
  position: sticky;
  top: 0;
  z-index: 50;
  background-color: rgba(24, 24, 27, 0.8);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-color);
}

.navbar-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 4rem;
  max-width: 80rem;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.025em;
}

.brand-icon {
  color: var(--primary-light);
  font-size: 1.5rem;
}

.nav-link {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
  text-decoration: none;
  transition: color 0.2s;
  display: flex;
  align-items: center;
  gap: 0.25rem;
}
.nav-link:hover {
  color: var(--text-primary);
}

/* Header */
.hero {
  position: relative;
  padding: 5rem 0;
  overflow: hidden;
  text-align: center;
}

.hero-bg {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(to bottom right, rgba(49, 46, 129, 0.2), rgba(88, 28, 135, 0.1));
  z-index: 0;
}

.hero-content {
  position: relative;
  z-index: 10;
  max-width: 42rem;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.hero-title {
  margin: 0;
  font-size: 2.5rem;
  font-weight: 800;
  letter-spacing: -0.025em;
  margin-bottom: 1rem;
  background: linear-gradient(to right, #818cf8, #c084fc);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1.2;
}

@media (min-width: 768px) {
  .hero-title {
    font-size: 3rem;
  }
}

.hero-desc {
  margin: 0;
  font-size: 1.125rem;
  color: var(--text-secondary);
}

/* Main */
.main-content {
  flex-grow: 1;
  max-width: 80rem;
  margin: 0 auto;
  padding: 3rem 1.5rem;
  width: 100%;
  box-sizing: border-box;
}

/* Controls */
.controls {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 2rem;
  gap: 1rem;
}

@media (min-width: 768px) {
  .controls {
    flex-direction: row;
    align-items: center;
  }
}

.filters {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.filter-btn {
  padding: 0.5rem 1rem;
  border-radius: 9999px;
  background-color: #27272a;
  color: var(--text-secondary);
  font-size: 0.875rem;
  font-weight: 500;
  border: none;
  cursor: pointer;
  transition: all 0.2s;
  font-family: inherit;
}

.filter-btn:hover {
  background-color: #3f3f46;
  color: var(--text-primary);
}

.filter-btn.active {
  background-color: var(--primary);
  color: white;
}

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

/* Grid */
.feed-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

@media (min-width: 768px) {
  .feed-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .feed-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* Card */
.glass-card {
  background-color: var(--card-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--card-border);
  border-radius: 1rem;
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  text-decoration: none;
  color: var(--text-primary);
  transition: all 0.3s ease;
  box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
}

.glass-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
  border-color: var(--card-hover-border);
  background-color: var(--card-hover-bg);
}

.card-header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.75rem;
}

.source-name {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.card-date {
  margin-left: auto;
  font-size: 0.75rem;
  color: var(--text-muted);
  font-weight: 500;
}

.card-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin: 0 0 0.75rem 0;
  line-height: 1.25;
  transition: color 0.2s;
}

.glass-card:hover .card-title {
  color: var(--primary-light);
}

.card-desc {
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin: 0 0 1.5rem 0;
  flex-grow: 1;
  line-height: 1.6;
}

.card-footer {
  margin-top: auto;
  display: flex;
  align-items: center;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--primary-light);
  transition: color 0.2s;
}

.glass-card:hover .card-footer {
  color: #a5b4fc;
}

.card-footer i {
  margin-left: 0.5rem;
  transition: transform 0.2s;
}

.glass-card:hover .card-footer i {
  transform: translateX(4px);
}

/* Skeletons */
.skeleton-pulse {
  animation: pulse 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: .5; }
}

.skeleton-line {
  background-color: #3f3f46;
  border-radius: 0.25rem;
  margin-bottom: 0.75rem;
  height: 1rem;
}

.skeleton-line.w-1-4 { width: 25%; }
.skeleton-line.w-3-4 { width: 75%; height: 1.5rem; }
.skeleton-line.w-1-2 { width: 50%; height: 1.5rem; margin-bottom: 1.5rem; }
.skeleton-line.w-full { width: 100%; }
.skeleton-line.w-5-6 { width: 83.333%; }

.skeleton-card {
  pointer-events: none;
}

@media (max-width: 767px) {
  .skeleton-card.md-only {
    display: none;
  }
}

/* Error State */
.error-state {
  text-align: center;
  padding: 3rem 0;
}
.error-icon {
  font-size: 2.25rem;
  color: #ef4444;
  margin-bottom: 1rem;
}
.error-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin: 0 0 0.5rem 0;
}
.error-desc {
  color: var(--text-muted);
  font-size: 0.875rem;
}
.hidden {
  display: none !important;
}

/* Footer */
.footer {
  background-color: rgba(24, 24, 27, 1);
  border-top: 1px solid var(--border-color);
  padding: 2rem 0;
  margin-top: auto;
  text-align: center;
}
.footer-text {
  color: var(--text-muted);
  font-size: 0.875rem;
  margin: 0;
}

/* Source Colors */
.text-blue-400 { color: #60a5fa; }
.text-red-400 { color: #f87171; }
.text-pink-400 { color: #f472b6; }