:root {
  color-scheme: light dark;
  color: var(--vbg-text-primary, #171717);
  background: var(--vbg-surface-primary, #ffffff);
  font-family: var(--vbg-font-sans, "Geist", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

* {
  box-sizing: border-box;
}

html {
  color-scheme: light dark;
}

html.light,
html.light body,
html.light .vbg-report {
  color-scheme: light !important;
}

html.dark,
html.dark body,
html.dark .vbg-report {
  color-scheme: dark !important;
}

@media (prefers-color-scheme: dark) {
  html:not(.light) body,
  html:not(.light) .vbg-report {
    color-scheme: dark;
  }
}

body {
  min-width: 320px;
  margin: 0;
  background: var(--vbg-surface-primary, #ffffff);
  color: var(--vbg-text-primary, #171717);
  font-family: var(--vbg-font-sans, "Geist", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif);
}

body:has(.vbg-report) {
  background: var(--vbg-surface-primary, #ffffff);
}

a {
  color: inherit;
  text-decoration: none;
}

/* ==========================================================================
   Shell & Layout
   ========================================================================== */

.public-shell {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background: var(--vbg-surface-primary, #ffffff);
}

/* ==========================================================================
   Header (matches homepage SiteHeader)
   ========================================================================== */

.public-header {
  position: sticky;
  top: 0;
  z-index: 30;
  border-bottom: 1px solid var(--vbg-border-subtle, #ebebeb);
  background: var(--vbg-surface-primary, #ffffff);
}

.public-header-inner {
  width: min(100% - 2rem, 75rem);
  max-width: 1200px;
  height: 60px;
  margin: 0 auto;
  padding: 0 1rem;
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
}

@media (min-width: 640px) {
  .public-header-inner {
    height: 64px;
    grid-template-columns: 1fr auto 1fr;
    padding: 0 1.5rem;
  }
}

.public-brand {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--vbg-text-primary, #171717);
  text-decoration: none;
}

.brand-mark {
  position: relative;
  display: grid;
  width: 22px;
  height: 22px;
  place-items: center;
  background: var(--vbg-text-primary, #171717);
  clip-path: polygon(50% 4%, 97% 88%, 3% 88%);
  flex-shrink: 0;
}

.brand-mark span {
  width: 10px;
  height: 10px;
  transform: translateY(3px);
  background: var(--vbg-surface-primary, #ffffff);
  clip-path: polygon(50% 4%, 97% 88%, 3% 88%);
}

.public-nav {
  display: none;
  align-items: center;
  gap: 0.25rem;
}

@media (min-width: 640px) {
  .public-nav {
    display: flex;
    justify-self: center;
  }
}

.public-nav-link {
  display: inline-flex;
  align-items: center;
  min-height: 2.25rem;
  padding: 0.5rem 0.75rem;
  border-radius: 8px;
  font-size: 0.875rem;
  line-height: 1.25rem;
  color: var(--vbg-text-secondary, #666);
  text-decoration: none;
  transition: background-color 0.16s ease, color 0.16s ease;
}

.public-nav-link:hover {
  background: var(--vbg-surface-secondary, #f5f5f5);
  color: var(--vbg-text-primary, #171717);
}

.public-header-actions {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  justify-self: end;
}

@media (min-width: 640px) {
  .public-header-actions {
    gap: 0.5rem;
  }
}

/* Theme toggle control */
.public-theme-control {
  display: grid;
  width: 36px;
  height: 36px;
  place-items: center;
  padding: 0;
  border: none;
  background: transparent;
  color: var(--vbg-text-secondary, #666);
  border-radius: 8px;
  cursor: pointer;
  transition: color 0.16s ease, background-color 0.16s ease;
}

.public-theme-control:hover {
  background: var(--vbg-surface-secondary, #f5f5f5);
  color: var(--vbg-text-primary, #171717);
}

.public-theme-control .theme-icon {
  display: none;
  width: 18px;
  height: 18px;
}

/* Default (system preference) */
.public-theme-control .theme-icon--system {
  display: block;
}

/* Light mode icon */
html[data-theme="light"] .public-theme-control .theme-icon--light {
  display: block;
}
html[data-theme="light"] .public-theme-control .theme-icon--system {
  display: none;
}

/* Dark mode icon */
html[data-theme="dark"] .public-theme-control .theme-icon--dark {
  display: block;
}
html[data-theme="dark"] .public-theme-control .theme-icon--system {
  display: none;
}

.public-github-link {
  display: grid;
  width: 36px;
  height: 36px;
  place-items: center;
  color: var(--vbg-text-secondary, #666);
  border-radius: 8px;
  transition: color 0.16s ease, background-color 0.16s ease;
}

.public-github-link:hover {
  background: var(--vbg-surface-secondary, #f5f5f5);
  color: var(--vbg-text-primary, #171717);
}

.public-github-icon {
  width: 18px;
  height: 18px;
}

.public-nav-action {
  display: none;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 0.75rem;
  font-family: var(--vbg-font-mono, monospace);
  font-size: 0.75rem;
  color: var(--vbg-text-primary, #171717);
  text-decoration: none;
}

@media (min-width: 768px) {
  .public-nav-action {
    display: inline-flex;
  }
}

.public-nav-action:hover {
  text-decoration: underline;
  text-underline-offset: 4px;
}

/* ==========================================================================
   Hero Section
   ========================================================================== */

.public-hero {
  border-bottom: 1px solid var(--vbg-border-subtle, #ebebeb);
  background: var(--vbg-surface-primary, #ffffff);
}

.public-hero-inner {
  width: min(100% - 2rem, 75rem);
  max-width: 1200px;
  margin: 0 auto;
  padding: clamp(2.5rem, 5vw, 4.5rem) 1rem clamp(2.5rem, 5vw, 4rem);
}

@media (min-width: 640px) {
  .public-hero-inner {
    padding-left: 1.5rem;
    padding-right: 1.5rem;
  }
}

.public-hero-badge {
  margin-bottom: 1rem;
}

.public-mono-label,
.public-label {
  display: inline-flex;
  font-family: var(--vbg-font-mono, monospace);
  font-size: 0.75rem;
  line-height: 1rem;
  color: var(--vbg-text-secondary, #888);
  letter-spacing: 0.02em;
}

.public-hero-title,
h1 {
  max-width: 26ch;
  margin: 0.75rem 0 1.25rem;
  font-size: clamp(1.875rem, 3.5vw, 2.75rem);
  font-weight: 600;
  line-height: 1.25;
  letter-spacing: -0.035em;
  color: var(--vbg-text-primary, #171717);
}

.public-hero-intro,
.public-hero p {
  max-width: 52rem;
  margin: 0;
  color: var(--vbg-text-secondary, #555);
  font-size: clamp(0.9375rem, 1.2vw, 1.0625rem);
  line-height: 1.68;
}

.public-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem;
  margin-top: 2rem;
}

.public-action {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 1.25rem;
  border-radius: 12px;
  font-size: 0.875rem;
  font-weight: 500;
  text-decoration: none;
  transition: background-color 0.16s ease, color 0.16s ease, border-color 0.16s ease, opacity 0.16s ease;
}

.public-action--primary,
.public-action:not(.public-action--secondary):not(.public-action--quiet) {
  background: var(--vbg-text-primary, #171717);
  color: var(--vbg-surface-primary, #ffffff);
  border: 1px solid transparent;
}

.public-action--primary:hover,
.public-action:not(.public-action--secondary):not(.public-action--quiet):hover {
  opacity: 0.88;
}

.public-action--secondary,
.public-action--quiet {
  background: var(--vbg-surface-primary, #ffffff);
  color: var(--vbg-text-primary, #171717);
  border: 1px solid var(--vbg-border-subtle, #ebebeb);
}

.public-action--secondary:hover,
.public-action--quiet:hover {
  background: var(--vbg-surface-secondary, #fafafa);
  color: var(--vbg-text-primary, #171717);
}

/* ==========================================================================
   Article & Content Sections
   ========================================================================== */

.public-article {
  width: min(100% - 2rem, 75rem);
  max-width: 1200px;
  margin: 0 auto;
  padding: clamp(2rem, 4vw, 3.5rem) 1rem;
}

@media (min-width: 640px) {
  .public-article {
    padding-left: 1.5rem;
    padding-right: 1.5rem;
  }
}

.public-section {
  display: grid;
  grid-template-columns: minmax(0, 16rem) minmax(0, 48rem);
  gap: 1.5rem clamp(2.5rem, 5vw, 5rem);
  border-top: 1px solid var(--vbg-border-subtle, #ebebeb);
  padding: clamp(2.25rem, 3.5vw, 3rem) 0;
}

.public-section:first-child {
  border-top: none;
  padding-top: 0;
}

.public-section h2 {
  margin: 0;
  font-size: 1.125rem;
  font-weight: 600;
  line-height: 1.4;
  letter-spacing: -0.025em;
  color: var(--vbg-text-primary, #171717);
}

.public-section p {
  margin: 0 0 1.25rem;
  color: var(--vbg-text-secondary, #4d4d4d);
  font-size: 0.9375rem;
  line-height: 1.7;
}

.public-section p:last-child {
  margin-bottom: 0;
}

.public-section a {
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-color: var(--vbg-border-strong, #a1a1a1);
  color: var(--vbg-text-primary, #171717);
}

.public-section a:hover {
  text-decoration-color: var(--vbg-text-primary, #171717);
}

/* ==========================================================================
   Sources & Related Reading
   ========================================================================== */

.public-sources {
  border-top: 1px solid var(--vbg-border-subtle, #ebebeb);
  padding: clamp(2.25rem, 3.5vw, 3rem) 0;
}

.public-sources h2 {
  margin: 0 0 1.5rem;
  font-size: 1.125rem;
  font-weight: 600;
  line-height: 1.4;
  letter-spacing: -0.025em;
  color: var(--vbg-text-primary, #171717);
}

/* Reading Cards Grid */
.public-reading-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
  list-style: none;
  padding: 0;
  margin: 0;
}

@media (min-width: 640px) {
  .public-reading-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.public-reading-item {
  display: flex;
}

.public-reading-link {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  width: 100%;
  padding: 1.25rem 1.5rem;
  border: 1px solid var(--vbg-border-subtle, #ebebeb);
  border-radius: 16px;
  background: var(--vbg-surface-primary, #ffffff);
  text-decoration: none;
  transition: background-color 0.16s ease, border-color 0.16s ease;
}

.public-reading-link:hover {
  background: var(--vbg-surface-secondary, #fafafa);
  border-color: var(--vbg-border-default, #eaeaea);
}

.public-reading-content {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.public-reading-eyebrow {
  font-family: var(--vbg-font-mono, monospace);
  font-size: 0.75rem;
  color: var(--vbg-text-secondary, #888);
}

.public-reading-title {
  font-size: 0.9375rem;
  font-weight: 600;
  line-height: 1.4;
  letter-spacing: -0.02em;
  color: var(--vbg-text-primary, #171717);
}

.public-reading-arrow {
  color: var(--vbg-text-secondary, #888);
  font-size: 1rem;
  transition: transform 0.16s ease, color 0.16s ease;
  flex-shrink: 0;
}

.public-reading-link:hover .public-reading-arrow {
  transform: translateX(3px);
  color: var(--vbg-text-primary, #171717);
}

/* Source links */
.public-sources-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.public-source-item {
  display: flex;
}

.public-source-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.875rem;
  line-height: 1.5;
  color: var(--vbg-text-secondary, #666);
  text-decoration: none;
  transition: color 0.16s ease;
}

.public-source-link:hover {
  color: var(--vbg-text-primary, #171717);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.public-source-arrow {
  font-size: 0.75rem;
  opacity: 0.6;
}

/* ==========================================================================
   Footer (matches homepage footer)
   ========================================================================== */

.public-footer {
  margin-top: auto;
  border-top: 1px solid var(--vbg-border-subtle, #ebebeb);
  background: var(--vbg-surface-primary, #ffffff);
}

.public-footer-inner {
  width: min(100% - 2rem, 75rem);
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem 1rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  align-items: flex-start;
  justify-content: space-between;
}

@media (min-width: 640px) {
  .public-footer-inner {
    padding-left: 1.5rem;
    padding-right: 1.5rem;
  }
}

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

.public-footer-brand {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--vbg-text-primary, #171717);
  text-decoration: none;
}

.public-footer-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.75rem;
  color: var(--vbg-text-secondary, #888);
}

.public-footer-divider {
  opacity: 0.4;
}

.public-footer-link {
  color: var(--vbg-text-secondary, #888);
  text-decoration: none;
  transition: color 0.16s ease;
}

.public-footer-link:hover {
  color: var(--vbg-text-primary, #171717);
  text-decoration: underline;
}

.public-back-top {
  font-size: 0.75rem;
  color: var(--vbg-text-secondary, #888);
  text-decoration: none;
  transition: color 0.16s ease;
}

.public-back-top:hover {
  color: var(--vbg-text-primary, #171717);
}

/* ==========================================================================
   Responsive Adaptations
   ========================================================================== */

@media (max-width: 768px) {
  .public-section {
    grid-template-columns: 1fr;
    gap: 0.75rem;
    padding: 1.75rem 0;
  }
}