:root {
  --bg-primary: #0f172a;
  --bg-card: #1e293b;
  --bg-card-hover: #334155;
  --border-color: rgba(255, 255, 255, 0.1);
  --border-hover: rgba(99, 102, 241, 0.5);
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --accent-primary: #6366f1;
  --accent-secondary: #818cf8;
  --accent-glow: rgba(99, 102, 241, 0.25);
  --shadow-sm: 0 4px 6px -1px rgba(0, 0, 0, 0.3), 0 2px 4px -1px rgba(0, 0, 0, 0.2);
  --shadow-lg: 0 10px 25px -5px rgba(0, 0, 0, 0.5), 0 8px 10px -6px rgba(0, 0, 0, 0.4);
  --radius-lg: 16px;
  --radius-md: 12px;
  --radius-sm: 8px;
  --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  position: relative;
  line-height: 1.5;
  overflow-x: hidden;
}

/* Dynamic background grid accent */
.background-grid {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: 
    radial-gradient(circle at 50% 0%, rgba(99, 102, 241, 0.15) 0%, transparent 60%),
    linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
  background-size: 100% 100%, 32px 32px, 32px 32px;
  pointer-events: none;
  z-index: 0;
}

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 2.5rem 1.5rem;
  width: 100%;
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

/* Header */
.header {
  text-align: center;
  margin-bottom: 3rem;
}

.logo-area {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  margin-bottom: 0.5rem;
}

.badge {
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  color: #ffffff;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0.25rem 0.6rem;
  border-radius: var(--radius-sm);
}

.header h1 {
  font-size: 2.25rem;
  font-weight: 800;
  background: linear-gradient(135deg, #ffffff 30%, var(--text-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  letter-spacing: -0.025em;
}

.subtitle {
  color: var(--text-secondary);
  font-size: 1.05rem;
}

/* Main Grid */
main {
  flex: 1;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1.5rem;
}

/* Site Link Cards */
.card {
  display: flex;
  align-items: flex-start;
  gap: 1.25rem;
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  text-decoration: none;
  color: var(--text-primary);
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
  opacity: 0;
  transition: var(--transition);
}

.card:hover {
  transform: translateY(-4px);
  background-color: var(--bg-card-hover);
  border-color: var(--border-hover);
  box-shadow: var(--shadow-lg), 0 0 20px var(--accent-glow);
}

.card:hover::before {
  opacity: 1;
}

.card:focus-visible {
  outline: 2px solid var(--accent-secondary);
  outline-offset: 3px;
}

/* Icon Container */
.card-icon-wrapper {
  width: 52px;
  height: 52px;
  min-width: 52px;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 8px;
  overflow: hidden;
}

.card-icon {
  width: 100%;
  height: 100%;
  object-fit: contain;
  transition: transform 0.3s ease;
}

.card:hover .card-icon {
  transform: scale(1.1);
}

.fallback-icon {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--accent-secondary);
}

/* Card Info */
.card-content {
  flex: 1;
  display: flex;
  flex-direction: column;
}

.card-title-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  margin-bottom: 0.35rem;
}

.card-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.3;
}

.arrow-icon {
  color: var(--text-secondary);
  font-size: 1rem;
  transition: transform 0.25s ease, color 0.25s ease;
}

.card:hover .arrow-icon {
  color: var(--accent-secondary);
  transform: translateX(4px);
}

.card-description {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.4;
}

/* Loading State */
.loading-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 4rem 1rem;
  color: var(--text-secondary);
  gap: 1rem;
}

.spinner {
  width: 40px;
  height: 40px;
  border: 3px solid rgba(255, 255, 255, 0.1);
  border-top-color: var(--accent-primary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

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

/* Error State */
.error-state {
  text-align: center;
  padding: 3rem 1.5rem;
  background-color: var(--bg-card);
  border: 1px solid rgba(239, 68, 68, 0.3);
  border-radius: var(--radius-lg);
  max-width: 480px;
  margin: 2rem auto;
}

.error-icon {
  font-size: 2.5rem;
  margin-bottom: 0.75rem;
}

.error-state h2 {
  font-size: 1.25rem;
  color: #f87171;
  margin-bottom: 0.5rem;
}

.error-state p {
  color: var(--text-secondary);
  margin-bottom: 1.25rem;
  font-size: 0.95rem;
}

.retry-button {
  background-color: var(--accent-primary);
  color: #ffffff;
  border: none;
  padding: 0.6rem 1.4rem;
  font-size: 0.9rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: var(--transition);
}

.retry-button:hover {
  background-color: var(--accent-secondary);
}

.hidden {
  display: none !important;
}

/* Footer */
.footer {
  text-align: center;
  margin-top: 3rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border-color);
  color: var(--text-secondary);
  font-size: 0.85rem;
}

/* Mobile responsive adjustments */
@media (max-width: 640px) {
  .container {
    padding: 1.5rem 1rem;
  }
  
  .header h1 {
    font-size: 1.75rem;
  }
  
  .card-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 1.5rem;
  }
  .card {
    flex: 1 1 320px;
    max-width: 500px; /* Prevent them from getting comically large */
  }
}