/* Kinetic Ledger Design System */
:root {
  --background: #f2f5fa;
  --surface: #ffffff;
  --surface-elevated: #f8fafc;
  --primary: #2563eb; /* Deeper Blue for Light Mode */
  --primary-soft: rgba(37, 99, 235, 0.1);
  --on-surface: #0f172a;
  --on-surface-variant: #475569;
  --outline: #e2e8f0;
  --silver: #64748b;
  --font-main: "Space Grotesk", sans-serif;
  --container-max: 1440px;
  --gutter: 24px;
}

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

body {
  background-color: var(--background);
  color: var(--on-surface);
  font-family: var(--font-main);
  font-size: 16px;
  line-height: 1.6;
  overflow-x: hidden;
}

/* Layout Utilities */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 32px;
}

.blueprint-grid {
  background-image: radial-gradient(var(--outline) 1px, transparent 1px);
  background-size: 20px 20px;
}

/* Top Bar */
.top-advertorial-bar {
  background: #f1f5f9;
  color: var(--silver);
  text-transform: uppercase;
  font-size: 10px;
  letter-spacing: 0.2em;
  text-align: center;
  padding: 8px 0;
  border-bottom: 1px solid var(--outline);
}

/* Header */
.main-header {
  background: var(--surface);
  border-bottom: 1px solid var(--outline);
  top: 0;
  z-index: 100;
  height: 72px;
}

.header-container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 32px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 100%;
}

.header-logo img {
  height: 32px;
  display: block;
}

.btn-header-cta {
  background: var(--primary);
  color: #121212;
  text-decoration: none;
  padding: 10px 24px;
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  transition: opacity 0.2s;
}

/* Hero Section */
.hero-section {
  padding: 80px 0 60px;
  border-bottom: 1px solid var(--outline);
}

.tech-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 4px 12px;
  background: rgba(59, 130, 246, 0.1);
  border: 1px solid rgba(59, 130, 246, 0.3);
  margin-bottom: 24px;
}

.tag-label {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--primary);
}

.tag-pulse {
  width: 6px;
  height: 6px;
  background: var(--primary);
  border-radius: 50%;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0% {
    opacity: 0.4;
  }
  50% {
    opacity: 1;
  }
  100% {
    opacity: 0.4;
  }
}

h1 {
  font-size: 48px;
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin-bottom: 24px;
  max-width: 900px;
  color: #0f172a;
}

.byline {
  display: flex;
  gap: 24px;
  color: var(--silver);
  font-size: 14px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* Article Structure */
.article-section {
  padding: 64px 0;
}

.article-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: var(--gutter);
}

/* Sidebar */
.sidebar {
  grid-column: span 3;
}

.sidebar-sticky {
  position: sticky;
  top: 100px;
}

.benchmark-card {
  background: var(--surface-elevated);
  border: 1px solid var(--outline);
  padding: 24px;
  margin-bottom: 40px;
}

.mono-label {
  display: block;
  font-size: 11px;
  font-weight: 600;
  color: var(--primary);
  text-transform: uppercase;
  letter-spacing: 0.15em;
  margin-bottom: 20px;
}

.metric-item {
  margin-bottom: 20px;
}

.metric-info {
  display: flex;
  justify-content: space-between;
  font-size: 11px;
  font-weight: 500;
  margin-bottom: 8px;
  color: var(--silver);
}

.metric-value {
  color: var(--primary);
}

.metric-bar-bg {
  height: 4px;
  background: var(--outline);
}

.metric-bar-fill {
  height: 100%;
  background: var(--primary);
}

.takeaways-list {
  border-left: 2px solid var(--primary);
  padding-left: 24px;
}

.h3-style {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 16px;
}

.takeaways-list ul {
  list-style: none;
}

.takeaways-list li {
  display: flex;
  gap: 12px;
  margin-bottom: 16px;
  font-size: 14px;
  color: var(--on-surface-variant);
}

.takeaways-list .material-symbols-outlined {
  font-size: 18px;
  color: var(--primary);
}

/* Article Body */
.article-body {
  grid-column: span 9;
}

.prose-block {
  margin-bottom: 48px;
}

.intro-text {
  font-size: 20px;
  color: var(--on-surface-variant);
  line-height: 1.5;
}

h2 {
  font-size: 32px;
  font-weight: 600;
  letter-spacing: -0.01em;
  margin-bottom: 24px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--outline);
  color: #0f172a;
}

.content-split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  align-items: start;
}

.split-text p {
  margin-bottom: 16px;
  color: var(--on-surface-variant);
}

.split-media {
  background: var(--surface);
  border: 1px solid var(--outline);
  position: relative;
}

.split-media img {
  width: 100%;
  opacity: 1;
  display: block;
}

.media-caption {
  padding: 16px;
}

.media-caption p {
  font-size: 12px;
  color: var(--silver);
  margin-top: 4px;
}

.image-full {
  margin: 32px 0;
  border: 1px solid var(--outline);
}

.image-full img {
  width: 100%;
  display: block;
  opacity: 1;
}

.standard-list {
  list-style: none;
  margin: 24px 0;
}

.standard-list li {
  position: relative;
  padding-left: 24px;
  margin-bottom: 12px;
  color: var(--on-surface-variant);
}

.standard-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 12px;
  height: 1px;
  background: var(--primary);
}

/* CTA Block */
.cta-feature-block {
  background: var(--surface-elevated);
  border: 1px solid rgba(59, 130, 246, 0.2);
  box-shadow: 0 0 20px rgba(59, 130, 246, 0.05);
  padding: 48px;
  margin: 64px 0;
}

.cta-header {
  display: flex;
  gap: 24px;
  margin-bottom: 32px;
}

.cta-icon-box {
  width: 64px;
  height: 64px;
  background: var(--primary);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.cta-icon-box .material-symbols-outlined {
  font-size: 36px;
}

.cta-title-area h2 {
  border: none;
  margin-bottom: 8px;
  padding: 0;
}

.cta-title-area p {
  color: var(--silver);
}

.cta-features-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}

.feature-checklist {
  list-style: none;
}

.feature-checklist li {
  padding-left: 28px;
  position: relative;
  font-size: 14px;
  margin-bottom: 16px;
  color: var(--on-surface-variant);
}

.feature-checklist li::before {
  content: "\e5ca";
  font-family: "Material Symbols Outlined";
  position: absolute;
  left: 0;
  color: var(--primary);
}

.cta-actions {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-top: 1px solid var(--outline);
  padding-top: 32px;
}

.cta-logo-outlined {
  height: 40px;
  outline: 2px solid var(--primary);
  outline-offset: 4px;
  display: block;
}

.cta-btn-group {
  display: flex;
  gap: 16px;
}

.btn-primary {
  background: var(--primary);
  color: #ffffff;
  text-decoration: none;
  padding: 14px 32px;
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  border-radius: 4px;
}

.btn-outline {
  border: 1px solid var(--primary);
  color: var(--primary);
  text-decoration: none;
  padding: 14px 32px;
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  border-radius: 4px;
}

/* Disclaimer */
.compliance-disclaimer {
  padding-top: 40px;
  border-top: 1px solid var(--outline);
  font-size: 12px;
  color: var(--silver);
  line-height: 1.8;
}

/* Footer */
.site-footer {
  background: var(--surface);
  border-top: 1px solid var(--outline);
  margin-top: 80px;
  padding: 60px 0 40px;
}

.footer-container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 32px;
}

.footer-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 40px;
}

.brand-name {
  display: block;
  font-size: 18px;
  font-weight: 700;
  color: var(--silver);
  margin-bottom: 8px;
}

.brand-tagline {
  font-size: 10px;
  letter-spacing: 0.15em;
  color: #555;
}

.footer-nav {
  display: flex;
  gap: 32px;
}

.footer-nav a {
  color: var(--silver);
  text-decoration: none;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  transition: color 0.2s;
}

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

.site-footer .brand-name {
  color: #0f172a;
}

.footer-bottom {
  border-top: 1px solid var(--outline);
  padding-top: 40px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.contact-details p {
  font-size: 12px;
  color: #555;
  margin-bottom: 4px;
}

.copyright {
  font-size: 12px;
  color: #555;
}

/* Responsive */
@media (max-width: 1024px) {
  .sidebar {
    display: none;
  }
  .article-body {
    grid-column: span 12;
  }
}

@media (max-width: 768px) {
  h1 {
    font-size: 32px;
  }
  .content-split {
    grid-template-columns: 1fr;
  }
  .cta-features-grid {
    grid-template-columns: 1fr;
  }
  .cta-actions {
    flex-direction: column;
    gap: 32px;
    align-items: flex-start;
  }
  .footer-top {
    flex-direction: column;
    gap: 32px;
  }
  .footer-nav {
    flex-direction: column;
    gap: 16px;
  }
  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
    gap: 24px;
  }
}