style.css

:root {
  --rabbithole-bg: #0f172a;
  --rabbithole-fg: #f1f5f9;
  --rabbithole-muted: #94a3b8;
  --rabbithole-accent: #8b5cf6;
  --rabbithole-accent2: #ec4899;
  --rabbithole-glow: #8b5cf640;
  --rabbithole-pulse: #8b5cf620;
  --rabbithole-easing: cubic-bezier(0.4, 0, 0.2, 1);
  --rabbithole-duration: 0.3s;
}
* { 
  box-sizing: border-box;
  -webkit-tap-highlight-color: transparent;
}

html, body {
  margin: 0;
  padding: 0;
  height: 100%;
  overflow: hidden;
  background: var(--quantum-bg);
  color: var(--quantum-fg);
  font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  font-weight: 400;
  line-height: 1.6;
}
body {
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  background: var(--rabbithole-bg);
  min-height: 100vh;
  padding: 1rem;
}

.rabbithole-gradient {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle at 50% 50%, #1e293b 0%, var(--rabbithole-bg) 70%);
  z-index: -2;
}
.particles-container {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  pointer-events: none;
}
.particle {
  position: absolute;
  background: linear-gradient(135deg, var(--rabbithole-accent), var(--rabbithole-accent2));
  border-radius: 50%;
  opacity: 0.3;
  animation: float 15s infinite ease-in-out;
  filter: blur(1px);
}
.rabbit-animation {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 9999;
  pointer-events: none;
  background: rgba(14, 15, 17, 0.95);
  display: flex;
  align-items: center;
  justify-content: center;
}

.rabbit-video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: brightness(1.2) contrast(1.1);
}
@keyframes float {
  0% { transform: translateY(0) translateX(0); }
  25% { transform: translateY(-20px) translateX(10px); }
  50% { transform: translateY(-40px) translateX(0); }
  75% { transform: translateY(-20px) translateX(-10px); }
  100% { transform: translateY(0) translateX(0); }
}
.rabbithole-card {
  width: 90vw;
  max-width: 500px;
  min-height: 70vh;
  padding: 2rem 1.5rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 1.5rem;
  touch-action: pan-y;
  position: relative;
  z-index: 1;
  margin: 2rem auto;
  background: rgba(30, 41, 59, 0.95);
  backdrop-filter: blur(20px);
  border-radius: 2rem;
  box-shadow: 0 25px 50px rgba(0, 0, 0, 0.3), 0 0 0 1px rgba(139, 92, 246, 0.2);
  border: 1px solid rgba(139, 92, 246, 0.3);
}
.rabbithole-header {
  text-align: center;
}

.rabbithole-progress {
  width: 100%;
  height: 2px;
  background: rgba(0,0,0,0.1);
  border-radius: 1px;
  margin: 1rem 0;
  overflow: hidden;
}
.progress-bar {
  height: 100%;
  background: var(--rabbithole-accent);
  width: 0%;
  transition: width 0.3s var(--rabbithole-easing);
  border-radius: 1px;
}

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

.rabbithole-guide {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin: 1.5rem 0;
}

.guide-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem;
  background: rgba(59, 130, 246, 0.05);
  border-radius: 0.5rem;
  font-size: 0.9rem;
  color: var(--rabbithole-fg);
}

.guide-icon {
  font-size: 1.2rem;
}
h1 {
  font-size: 1.8rem;
  margin: 0;
  letter-spacing: -0.01em;
  font-weight: 900;
  font-family: Verdana, Geneva, sans-serif;
  color: #000000;
  line-height: 1.3;
  text-align: center;
}
p {
  margin: 0;
  line-height: 1.6;
  color: var(--rabbithole-fg);
  font-size: 1rem;
  font-weight: 400;
  text-align: center;
}
.rabbithole-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  justify-content: center;
  margin: 1rem 0;
}

.meta-tag {
  background: linear-gradient(135deg, rgba(139, 92, 246, 0.15), rgba(236, 72, 153, 0.15));
  padding: 0.4rem 1rem;
  border-radius: 2rem;
  font-size: 0.8rem;
  color: var(--rabbithole-fg);
  border: 1px solid rgba(139, 92, 246, 0.3);
  backdrop-filter: blur(10px);
}
.rabbithole-error {
  color: #ef4444;
  font-size: 0.9rem;
  margin-top: 1rem;
  font-weight: 400;
}
.rabbithole-actions {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-top: 2rem;
  align-items: center;
}

.rabbithole-btn {
  position: relative;
  background: transparent;
  color: var(--rabbithole-fg);
  border: 2px solid var(--rabbithole-accent);
  padding: 1rem 2.5rem;
  border-radius: 2rem;
  font-size: 1rem;
  text-decoration: none;
  font-weight: 600;
  transition: all 0.3s var(--rabbithole-easing);
  overflow: hidden;
  width: 100%;
  max-width: 300px;
  text-align: center;
  background: linear-gradient(135deg, rgba(139, 92, 246, 0.1), rgba(236, 72, 153, 0.1));
}

.rabbithole-btn-primary {
  background: linear-gradient(135deg, var(--rabbithole-accent), var(--rabbithole-accent2));
  color: white;
  box-shadow: 0 0 30px var(--rabbithole-glow);
}

.rabbithole-btn-primary:hover {
  transform: translateY(-3px) scale(1.05);
  box-shadow: 0 0 50px var(--rabbithole-glow);
}

.rabbithole-btn-secondary {
  opacity: 0.9;
  border-color: var(--rabbithole-muted);
}

.rabbithole-btn-secondary:hover {
  opacity: 1;
  transform: translateY(-2px);
  border-color: var(--rabbithole-accent);
}
.rabbithole-sparkle {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.3s;
}

.rabbithole-btn:hover .rabbithole-sparkle {
  opacity: 1;
}
.rabbithole-nav-arrows {
  position: fixed;
  top: 50%;
  left: 0;
  right: 0;
  display: flex;
  justify-content: space-between;
  padding: 0 2rem;
  pointer-events: none;
  transform: translateY(-50%);
  z-index: 2;
}

.rabbithole-arrow {
  pointer-events: auto;
  width: 60px;
  height: 60px;
  border-radius: 50%;
  border: 2px solid var(--rabbithole-accent);
  color: var(--rabbithole-fg);
  background: rgba(30, 41, 59, 0.9);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  user-select: none;
  transition: all 0.3s var(--rabbithole-easing);
  backdrop-filter: blur(10px);
  cursor: pointer;
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.3);
}

.rabbithole-arrow:hover {
  transform: scale(1.15) translateY(-2px);
  box-shadow: 0 0 30px var(--rabbithole-glow);
  background: linear-gradient(135deg, var(--rabbithole-accent), var(--rabbithole-accent2));
  color: white;
}
.rabbithole-footer {
  position: fixed;
  bottom: 1rem;
  left: 0;
  right: 0;
  text-align: center;
  font-size: 0.8rem;
  color: var(--rabbithole-muted);
  opacity: 0.8;
  padding-bottom: env(safe-area-inset-bottom);
  z-index: 2;
}
/* Mobile optimizations */
@media (max-width: 768px) {
  .rabbithole-card {
    width: 95vw;
    padding: 1.5rem 1rem;
    min-height: 65vh;
  }
  
  h1 {
    font-size: 1.5rem;
  }
  
  p {
    font-size: 0.95rem;
  }
  
  .rabbithole-meta {
    flex-direction: column;
    align-items: center;
  }
  
  .rabbithole-arrow {
    width: 50px;
    height: 50px;
  }
  
  .rabbithole-btn {
    padding: 0.875rem 2rem;
    max-width: 250px;
  }
}

@media (max-width: 480px) {
  .rabbithole-card {
    padding: 1.25rem 0.875rem;
    gap: 1rem;
  }
  
  h1 {
    font-size: 1.3rem;
  }
  
  .rabbithole-actions {
    gap: 0.75rem;
  }
  
  .rabbithole-arrow {
    width: 45px;
    height: 45px;
    padding: 0 1rem;
  }
  
  .rabbithole-nav-arrows {
    padding: 0 1rem;
  }
}
/* Animation classes */
.fade-in {
  animation: fadeIn 0.5s var(--rabbithole-easing);
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Fullscreen swipe animations */
.slide-in-right {
  animation: slideInRightFullscreen 0.6s var(--rabbithole-easing) forwards;
}

@keyframes slideInRightFullscreen {
  0% { 
    opacity: 0;
    transform: translateX(100vw) scale(0.95);
    filter: blur(20px);
  }
  50% {
    opacity: 0.7;
    transform: translateX(0) scale(1.02);
    filter: blur(5px);
  }
  100% { 
    opacity: 1;
    transform: translateX(0) scale(1);
    filter: blur(0);
  }
}

.slide-in-left {
  animation: slideInLeftFullscreen 0.6s var(--rabbithole-easing) forwards;
}

@keyframes slideInLeftFullscreen {
  0% { 
    opacity: 0;
    transform: translateX(-100vw) scale(0.95);
    filter: blur(20px);
  }
  50% {
    opacity: 0.7;
    transform: translateX(0) scale(1.02);
    filter: blur(5px);
  }
  100% { 
    opacity: 1;
    transform: translateX(0) scale(1);
    filter: blur(0);
  }
}

/* Ghost overlay for transitions */
.transition-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(14, 15, 17, 0.8);
  z-index: 999;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}

.transition-overlay.active {
  opacity: 1;
}

/* Card states for transitions */
.rabbithole-card.transitioning {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 90vw;
  max-width: 500px;
  z-index: 1000;
  animation: none;
}
/* Dynamic background colors for content types */
.bg-science {
  background: linear-gradient(135deg, #3b82f6, #1d4ed8) !important;
}

.bg-history {
  background: linear-gradient(135deg, #f59e0b, #b45309) !important;
}

.bg-art {
  background: linear-gradient(135deg, #ec4899, #be185d) !important;
}

.bg-technology {
  background: linear-gradient(135deg, #8b5cf6, #7c3aed) !important;
}

.bg-nature {
  background: linear-gradient(135deg, #10b981, #059669) !important;
}

.bg-default {
  background: linear-gradient(135deg, var(--rabbithole-accent), var(--rabbithole-accent2)) !important;
}
/* New component styles */
user-profile {
  display: block;
}

history-modal {
  display: none;
}
/* Advertisement overlay styles */
.ad-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(14, 15, 17, 0.95);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2000;
  animation: fadeIn 0.3s ease;
}

.ad-content {
  background: #1a1c20;
  border: 2px solid var(--rabbithole-accent);
  border-radius: 1rem;
  padding: 1.5rem;
  width: 90%;
  max-width: 400px;
  box-shadow: 0 0 40px var(--rabbithole-glow);
}

.ad-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
}

.ad-badge {
  background: var(--rabbithole-accent);
  color: white;
  padding: 0.25rem 0.75rem;
  border-radius: 1rem;
  font-size: 0.8rem;
  font-weight: 600;
}

.ad-close {
  background: none;
  border: none;
  color: var(--rabbithole-muted);
  font-size: 1.5rem;
  cursor: pointer;
  padding: 0;
  width: 30px;
  height: 30px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.ad-close:hover {
  color: var(--rabbithole-fg);
}

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

.ad-image {
  width: 100%;
  height: 180px;
  object-fit: cover;
  border-radius: 0.5rem;
  margin-bottom: 1rem;
}
        .ad-title {
  color: #000000;
  margin: 0 0 0.5rem 0;
  font-size: 1.2rem;
  font-weight: 900;
  font-family: Verdana, Geneva, sans-serif;
}
.ad-description {
  color: var(--rabbithole-muted);
  margin: 0 0 1.5rem 0;
  font-size: 0.9rem;
  line-height: 1.4;
}

.ad-cta {
  background: linear-gradient(135deg, var(--rabbithole-accent), var(--rabbithole-accent2));
  color: white;
  border: none;
  padding: 0.75rem 2rem;
  border-radius: 2rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s var(--rabbithole-easing);
  width: 100%;
}

.ad-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 20px var(--rabbithole-glow);
}

.fade-out {
  animation: fadeOut 0.3s ease forwards;
}

@keyframes fadeOut {
  from { opacity: 1; }
  to { opacity: 0; }
}
/* Loading states */
.loading {
  opacity: 0.8;
  pointer-events: none;
}

.loading::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 24px;
  height: 24px;
  margin: -12px 0 0 -12px;
  border: 3px solid var(--rabbithole-accent);
  border-radius: 50%;
  border-top-color: transparent;
  animation: spin 1s linear infinite;
}

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