:root {
  --ad-border: rgba(148, 163, 184, 0.25);
  --ad-bg: rgba(15, 23, 42, 0.02);
  --ad-label-color: #64748b;
  
  --cta-primary-bg: #0f172a;
  --cta-primary-fg: #ffffff;
  --cta-primary-border: #0f172a;
  
  --cta-secondary-bg: #f8fafc;
  --cta-secondary-fg: #0f172a;
  --cta-secondary-border: #e2e8f0;
  
  --cta-success-bg: #03c75a;
  --cta-success-fg: #ffffff;
  --cta-success-border: #02b350;
  
  --cta-gradient-bg: linear-gradient(135deg, #03c75a 0%, #0284c7 100%);
  --cta-gradient-fg: #ffffff;
  --cta-gradient-border: transparent;
  
  --progress-bg: linear-gradient(90deg, #03c75a 0%, #0ea5e9 100%);
  --site-max-width: 1120px;
}

body.dark {
  --ad-border: rgba(148, 163, 184, 0.15);
  --ad-bg: rgba(255, 255, 255, 0.03);
  --ad-label-color: #94a3b8;
  
  --cta-primary-bg: #f1f5f9;
  --cta-primary-fg: #0f172a;
  --cta-primary-border: #f1f5f9;
  
  --cta-secondary-bg: #1e293b;
  --cta-secondary-fg: #f1f5f9;
  --cta-secondary-border: #334155;
  
  --cta-success-bg: #02b350;
  --cta-success-fg: #ffffff;
  --cta-success-border: #02b350;
}

/* Typography & Global Layout Optimization */
body {
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  font-family: 'Outfit', 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

.main {
  max-width: var(--site-max-width);
  padding: 0 1.5rem;
}

.post-content,
.post-single,
.post-entry,
.page-header,
.home-info,
.footer {
  max-width: 100%;
}

.post-content p {
  font-size: 1.125rem;
  line-height: 1.85;
  margin-bottom: 1.6rem;
  color: var(--content);
  letter-spacing: -0.005em;
}

.post-content h2 {
  font-size: 1.75rem;
  margin-top: 2.5rem;
  margin-bottom: 1.25rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--ad-border);
}

.post-content h3 {
  font-size: 1.4rem;
  margin-top: 2rem;
  margin-bottom: 1rem;
}

/* Reading Progress Bar */
.reading-progress-bar {
  position: fixed;
  top: 0;
  left: 0;
  height: 4px;
  background: var(--progress-bg);
  width: 0%;
  z-index: 9999;
  transition: width 0.1s ease-out;
}

/* Ad Slots Optimization (High CTR & Compliance) */
.ad-slot {
  margin: 2.2rem 0;
  padding: 1rem;
  border: 1px dashed var(--ad-border);
  border-radius: 12px;
  background: var(--ad-bg);
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.ad-slot::before {
  content: attr(aria-label);
  display: block;
  font-size: 0.72rem;
  color: var(--ad-label-color);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 0.75rem;
  font-weight: 600;
  opacity: 0.7;
}

.ad-slot__inner {
  width: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 90px;
}

.ad-slot--list-top .ad-slot__inner,
.ad-slot--list-bottom .ad-slot__inner,
.ad-slot--single-top .ad-slot__inner,
.ad-slot--single-bottom .ad-slot__inner,
.ad-slot--in-content .ad-slot__inner {
  min-height: 100px;
}

/* Call To Action (CTA) Optimization */
.cta {
  margin: 2rem 0;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.cta__button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.65rem;
  border-radius: 50px;
  padding: 0.95rem 2.2rem;
  font-weight: 700;
  font-size: 1.05rem;
  text-decoration: none !important;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.08);
  transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
  border: 1.5px solid transparent;
}

/* CTA Variants */
.cta__button--primary {
  background: var(--cta-primary-bg);
  color: var(--cta-primary-fg) !important;
  border-color: var(--cta-primary-border);
}

.cta__button--secondary {
  background: var(--cta-secondary-bg);
  color: var(--cta-secondary-fg) !important;
  border-color: var(--cta-secondary-border);
}

.cta__button--success {
  background: var(--cta-success-bg);
  color: var(--cta-success-fg) !important;
  border-color: var(--cta-success-border);
  animation: cta-pulse 2.5s infinite;
}

.cta__button--gradient {
  background: var(--cta-gradient-bg);
  color: var(--cta-gradient-fg) !important;
  border-color: var(--cta-gradient-border);
  animation: cta-pulse 2.5s infinite;
}

.cta__button--outline {
  background: transparent;
  color: var(--cta-primary-bg) !important;
  border-color: var(--cta-primary-bg);
}

body.dark .cta__button--outline {
  color: var(--cta-primary-fg) !important;
  border-color: var(--cta-primary-fg);
}

/* Hover States & Micro-interactions */
.cta__button:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.16);
  opacity: 0.95;
}

.cta__button:active {
  transform: translateY(1px);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

.cta__icon {
  display: inline-flex;
  width: 1.15em;
  height: 1.15em;
  transition: transform 0.2s ease;
}

.cta__button:hover .cta__icon {
  transform: translateX(3px);
}

.cta__note {
  margin: 0.6rem 0 0;
  color: var(--secondary);
  font-size: 0.9rem;
  font-style: italic;
  opacity: 0.85;
}

/* Pulse Animation for High CTR */
@keyframes cta-pulse {
  0% {
    box-shadow: 0 0 0 0 rgba(3, 199, 90, 0.4);
  }
  70% {
    box-shadow: 0 0 0 10px rgba(3, 199, 90, 0);
  }
  100% {
    box-shadow: 0 0 0 0 rgba(3, 199, 90, 0);
  }
}

/* Image improvements */
.post-content img {
  border-radius: 12px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.04);
}

/* Post list card improvements */
.post-entry {
  border-radius: 16px;
  padding: 1.75rem;
  margin-bottom: 1.5rem;
  background: var(--entry);
  border: 1px solid var(--ad-border);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.01);
  transition: all 0.25s ease;
}

.post-entry:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.04);
  border-color: rgba(3, 199, 90, 0.3);
}

.entry-header h2 {
  font-size: 1.45rem;
  line-height: 1.4;
  margin-bottom: 0.75rem;
}

/* Mobile Optimizations */
@media (max-width: 720px) {
  .main {
    padding: 0 1rem;
  }
  
  .post-content p {
    font-size: 1.05rem;
    line-height: 1.75;
  }
  
  .ad-slot {
    padding: 0.75rem;
    margin: 1.5rem 0;
  }
  
  .cta__button {
    width: 100%;
    padding: 0.85rem 1.5rem;
  }
  
  .post-entry {
    padding: 1.25rem;
  }
}