:root {
  --felix-primary: #1aeeae;
  --felix-primary-hover: #17d599;
  --felix-bg: #ffffff;
  --felix-bg-dark: #000000;
  --felix-border: #EAEAEA;
  --felix-border-dark: #1A1A1A;
  --felix-text-primary: #000000;
  --felix-text-secondary: #737373;
  --felix-text-muted: rgba(0, 0, 0, 0.4);
  --felix-card-bg: #ffffff;
  --felix-card-bg-dark: #0A0A0A;
  --felix-sidebar-width: 88px;
  --felix-radius: 8px;
  --felix-radius-lg: 12px;
  --felix-transition: 150ms ease-out;
  --felix-font: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
}

*, *::before, *::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body.felix-subpage {
  margin: 0;
  padding: 0;
  font-family: var(--felix-font);
  font-size: 14px;
  line-height: 1.6;
  background-color: var(--felix-bg);
  color: var(--felix-text-primary);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

html.dark body.felix-subpage {
  background-color: var(--felix-bg-dark);
  color: #ffffff;
}

.felix-subpage-wrapper {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  max-width: 100%;
  overflow-x: hidden;
}

/* ---- TOP NAV ---- */
.felix-subpage-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 55px;
  padding: 0 32px;
  border-bottom: 1px solid var(--felix-border);
  background-color: var(--felix-bg);
  position: sticky;
  top: 0;
  z-index: 100;
  flex-shrink: 0;
}

html.dark .felix-subpage-nav {
  border-bottom-color: var(--felix-border-dark);
  background-color: var(--felix-bg-dark);
}

.felix-subpage-nav-logo {
  font-family: var(--felix-font);
  font-size: 24px;
  font-weight: 700;
  letter-spacing: -0.04em;
  color: var(--felix-text-primary);
  text-decoration: none;
  line-height: 1;
}

html.dark .felix-subpage-nav-logo {
  color: #ffffff;
}

.felix-subpage-nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
}

.felix-subpage-nav-link {
  font-size: 12px;
  font-weight: 500;
  color: var(--felix-text-secondary);
  text-decoration: none;
  padding: 6px 12px;
  border-radius: var(--felix-radius);
  transition: color var(--felix-transition), background-color var(--felix-transition);
}

.felix-subpage-nav-link:hover {
  color: var(--felix-text-primary);
  background-color: rgba(0,0,0,0.05);
}

html.dark .felix-subpage-nav-link:hover {
  color: #ffffff;
  background-color: rgba(255,255,255,0.07);
}

.felix-subpage-nav-link.active {
  color: var(--felix-text-primary);
  font-weight: 600;
}

html.dark .felix-subpage-nav-link.active {
  color: #ffffff;
}

.felix-subpage-nav-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 6px 16px;
  font-size: 12px;
  font-weight: 500;
  color: #ffffff;
  background-color: var(--felix-primary);
  border: none;
  border-radius: var(--felix-radius);
  text-decoration: none;
  cursor: pointer;
  transition: background-color var(--felix-transition);
  white-space: nowrap;
}

.felix-subpage-nav-cta:hover {
  background-color: var(--felix-primary-hover);
}

/* ---- MAIN CONTENT ---- */
.felix-subpage-main {
  flex: 1;
  width: 100%;
  max-width: 860px;
  margin: 0 auto;
  padding: 56px 32px 80px;
}

/* ---- HERO / PAGE HEADER ---- */
.felix-page-header {
  margin-bottom: 48px;
  padding-bottom: 32px;
  border-bottom: 1px solid var(--felix-border);
}

html.dark .felix-page-header {
  border-bottom-color: var(--felix-border-dark);
}

.felix-page-header h1 {
  font-size: 32px;
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--felix-text-primary);
  margin: 0 0 12px 0;
  line-height: 1.2;
}

html.dark .felix-page-header h1 {
  color: #ffffff;
}

.felix-page-header p {
  font-size: 15px;
  color: var(--felix-text-secondary);
  margin: 0;
  max-width: 560px;
  line-height: 1.65;
}

.felix-page-label {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--felix-primary);
  margin-bottom: 14px;
}

.felix-page-label::before {
  content: '';
  display: inline-block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--felix-primary);
  flex-shrink: 0;
}

/* ---- SECTION HEADINGS ---- */
.felix-subpage-section {
  margin-bottom: 48px;
}

.felix-subpage-section:last-of-type {
  margin-bottom: 0;
}

.felix-subpage-section h2 {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--felix-text-primary);
  margin: 0 0 20px 0;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--felix-border);
  line-height: 1.3;
}

html.dark .felix-subpage-section h2 {
  color: #ffffff;
  border-bottom-color: var(--felix-border-dark);
}

.felix-subpage-section h3 {
  font-size: 15px;
  font-weight: 600;
  color: var(--felix-text-primary);
  margin: 0 0 8px 0;
  line-height: 1.4;
}

html.dark .felix-subpage-section h3 {
  color: #ffffff;
}

.felix-subpage-section p {
  font-size: 14px;
  color: var(--felix-text-secondary);
  line-height: 1.7;
  margin: 0 0 12px 0;
}

html.dark .felix-subpage-section p {
  color: rgba(255,255,255,0.6);
}

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

.felix-subpage-section a {
  color: var(--felix-primary);
  text-decoration: none;
  transition: color var(--felix-transition);
}

.felix-subpage-section a:hover {
  color: var(--felix-primary-hover);
  text-decoration: underline;
}

/* ---- Q&A LIST ---- */
.felix-qa-list {
  display: flex;
  flex-direction: column;
  gap: 0;
  list-style: none;
  margin: 0;
  padding: 0;
}

.felix-qa-item {
  border: 1px solid var(--felix-border);
  border-radius: var(--felix-radius-lg);
  overflow: hidden;
  margin-bottom: 12px;
  background-color: var(--felix-card-bg);
  transition: border-color var(--felix-transition);
}

html.dark .felix-qa-item {
  border-color: var(--felix-border-dark);
  background-color: var(--felix-card-bg-dark);
}

.felix-qa-item:hover {
  border-color: #CACACA;
}

html.dark .felix-qa-item:hover {
  border-color: #3A3A3A;
}

.felix-qa-item:last-child {
  margin-bottom: 0;
}

.felix-qa-question {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 18px 20px;
  font-size: 14px;
  font-weight: 600;
  color: var(--felix-text-primary);
  line-height: 1.4;
  background: none;
  border: none;
  width: 100%;
  text-align: left;
  cursor: pointer;
  transition: background-color var(--felix-transition);
}

html.dark .felix-qa-question {
  color: #ffffff;
}

.felix-qa-question:hover {
  background-color: rgba(0,0,0,0.02);
}

html.dark .felix-qa-question:hover {
  background-color: rgba(255,255,255,0.03);
}

.felix-qa-question-number {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  border-radius: 6px;
  background-color: rgba(26, 238, 174, 0.12);
  color: var(--felix-primary);
  font-size: 11px;
  font-weight: 700;
  margin-top: 1px;
}

.felix-qa-answer {
  padding: 0 20px 20px 54px;
  font-size: 14px;
  color: var(--felix-text-secondary);
  line-height: 1.7;
}

html.dark .felix-qa-answer {
  color: rgba(255,255,255,0.6);
}

.felix-qa-answer p {
  margin: 0 0 10px 0;
  font-size: 14px;
  color: var(--felix-text-secondary);
  line-height: 1.7;
}

html.dark .felix-qa-answer p {
  color: rgba(255,255,255,0.6);
}

.felix-qa-answer p:last-child {
  margin-bottom: 0;
}

/* Non-interactive Q&A (open list style) */
.felix-qa-open .felix-qa-item {
  cursor: default;
}

.felix-qa-open .felix-qa-question {
  cursor: default;
  pointer-events: none;
}

/* ---- ABOUT SECTIONS ---- */
.felix-about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-top: 4px;
}

.felix-about-card {
  padding: 20px;
  border: 1px solid var(--felix-border);
  border-radius: var(--felix-radius-lg);
  background-color: var(--felix-card-bg);
  transition: border-color var(--felix-transition);
}

html.dark .felix-about-card {
  border-color: var(--felix-border-dark);
  background-color: var(--felix-card-bg-dark);
}

.felix-about-card:hover {
  border-color: #CACACA;
}

html.dark .felix-about-card:hover {
  border-color: #3A3A3A;
}

.felix-about-card-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 8px;
  background-color: rgba(26, 238, 174, 0.1);
  margin-bottom: 12px;
  color: var(--felix-primary);
  font-size: 16px;
}

.felix-about-card h3 {
  font-size: 13px;
  font-weight: 600;
  color: var(--felix-text-primary);
  margin: 0 0 6px 0;
  line-height: 1.4;
}

html.dark .felix-about-card h3 {
  color: #ffffff;
}

.felix-about-card p {
  font-size: 13px;
  color: var(--felix-text-secondary);
  line-height: 1.6;
  margin: 0;
}

html.dark .felix-about-card p {
  color: rgba(255,255,255,0.55);
}

/* ---- STATS ROW ---- */
.felix-stats-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-bottom: 32px;
}

.felix-stat-box {
  padding: 20px;
  border: 1px solid var(--felix-border);
  border-radius: var(--felix-radius-lg);
  background-color: var(--felix-card-bg);
  text-align: center;
}

html.dark .felix-stat-box {
  border-color: var(--felix-border-dark);
  background-color: var(--felix-card-bg-dark);
}

.felix-stat-value {
  display: block;
  font-size: 24px;
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--felix-primary);
  margin-bottom: 4px;
  line-height: 1.2;
}

.felix-stat-label {
  display: block;
  font-size: 12px;
  color: var(--felix-text-secondary);
  line-height: 1.4;
}

html.dark .felix-stat-label {
  color: rgba(255,255,255,0.5);
}

/* ---- PROSE CONTENT ---- */
.felix-prose {
  font-size: 14px;
  color: var(--felix-text-secondary);
  line-height: 1.75;
}

html.dark .felix-prose {
  color: rgba(255,255,255,0.6);
}

.felix-prose p {
  margin: 0 0 16px 0;
}

.felix-prose p:last-child {
  margin-bottom: 0;
}

.felix-prose strong {
  font-weight: 600;
  color: var(--felix-text-primary);
}

html.dark .felix-prose strong {
  color: #ffffff;
}

.felix-prose a {
  color: var(--felix-primary);
  text-decoration: none;
}

.felix-prose a:hover {
  text-decoration: underline;
}

.felix-prose ul {
  margin: 0 0 16px 0;
  padding-left: 20px;
  list-style: none;
}

.felix-prose ul li {
  position: relative;
  padding-left: 4px;
  margin-bottom: 8px;
  font-size: 14px;
  line-height: 1.65;
}

.felix-prose ul li::before {
  content: '';
  position: absolute;
  left: -14px;
  top: 8px;
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background-color: var(--felix-primary);
  flex-shrink: 0;
}

/* ---- CALLOUT BOX ---- */
.felix-callout {
  padding: 16px 20px;
  border-radius: var(--felix-radius);
  background-color: rgba(26, 238, 174, 0.07);
  border: 1px solid rgba(26, 238, 174, 0.2);
  margin-bottom: 24px;
}

.felix-callout p {
  font-size: 13px;
  color: var(--felix-text-secondary);
  line-height: 1.6;
  margin: 0;
}

html.dark .felix-callout p {
  color: rgba(255,255,255,0.6);
}

.felix-callout strong {
  color: var(--felix-primary);
  font-weight: 600;
}

/* ---- NAVIGATION BUTTONS ---- */
.felix-nav-buttons {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 56px;
  padding-top: 32px;
  border-top: 1px solid var(--felix-border);
  flex-wrap: wrap;
}

html.dark .felix-nav-buttons {
  border-top-color: var(--felix-border-dark);
}

.felix-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 8px 20px;
  font-size: 13px;
  font-weight: 500;
  border-radius: var(--felix-radius);
  text-decoration: none;
  cursor: pointer;
  transition: background-color var(--felix-transition), border-color var(--felix-transition), color var(--felix-transition);
  white-space: nowrap;
  border: 1px solid transparent;
  font-family: var(--felix-font);
  line-height: 1.4;
}

.felix-btn-primary {
  background-color: var(--felix-primary);
  color: #ffffff;
  border-color: var(--felix-primary);
}

.felix-btn-primary:hover {
  background-color: var(--felix-primary-hover);
  border-color: var(--felix-primary-hover);
  text-decoration: none;
}

.felix-btn-secondary {
  background-color: transparent;
  color: var(--felix-text-primary);
  border-color: var(--felix-border);
}

html.dark .felix-btn-secondary {
  color: #ffffff;
  border-color: var(--felix-border-dark);
}

.felix-btn-secondary:hover {
  background-color: rgba(0,0,0,0.04);
  border-color: #CACACA;
  text-decoration: none;
}

html.dark .felix-btn-secondary:hover {
  background-color: rgba(255,255,255,0.06);
  border-color: #3A3A3A;
}

.felix-btn-ghost {
  background-color: transparent;
  color: var(--felix-text-secondary);
  border-color: transparent;
  padding-left: 0;
  padding-right: 0;
}

.felix-btn-ghost:hover {
  color: var(--felix-text-primary);
  text-decoration: none;
  background-color: transparent;
}

html.dark .felix-btn-ghost:hover {
  color: #ffffff;
}

.felix-btn-icon {
  display: inline-block;
  font-style: normal;
  line-height: 1;
}

/* ---- BREADCRUMB ---- */
.felix-breadcrumb {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  color: var(--felix-text-secondary);
  margin-bottom: 24px;
  flex-wrap: wrap;
}

.felix-breadcrumb a {
  color: var(--felix-text-secondary);
  text-decoration: none;
  transition: color var(--felix-transition);
}

.felix-breadcrumb a:hover {
  color: var(--felix-text-primary);
}

html.dark .felix-breadcrumb a:hover {
  color: #ffffff;
}

.felix-breadcrumb-sep {
  color: var(--felix-text-muted);
  font-size: 11px;
}

.felix-breadcrumb-current {
  color: var(--felix-text-primary);
  font-weight: 500;
}

html.dark .felix-breadcrumb-current {
  color: rgba(255,255,255,0.8);
}

/* ---- INLINE LINKS ---- */
.felix-inline-link {
  color: var(--felix-primary);
  text-decoration: none;
  font-weight: 500;
  transition: color var(--felix-transition);
}

.felix-inline-link:hover {
  color: var(--felix-primary-hover);
  text-decoration: underline;
}

/* ---- DIVIDER ---- */
.felix-divider {
  height: 1px;
  background-color: var(--felix-border);
  margin: 40px 0;
  border: none;
}

html.dark .felix-divider {
  background-color: var(--felix-border-dark);
}

/* ---- TAG / BADGE ---- */
.felix-tag {
  display: inline-flex;
  align-items: center;
  padding: 2px 8px;
  font-size: 11px;
  font-weight: 600;
  border-radius: 20px;
  letter-spacing: 0.02em;
  white-space: nowrap;
}

.felix-tag-green {
  background-color: rgba(26, 238, 174, 0.12);
  color: var(--felix-primary);
}

.felix-tag-neutral {
  background-color: rgba(0,0,0,0.06);
  color: var(--felix-text-secondary);
}

html.dark .felix-tag-neutral {
  background-color: rgba(255,255,255,0.08);
  color: rgba(255,255,255,0.5);
}

/* ---- FOOTER ---- */
.felix-subpage-footer {
  border-top: 1px solid var(--felix-border);
  padding: 20px 32px;
  background-color: var(--felix-bg);
}

html.dark .felix-subpage-footer {
  border-top-color: var(--felix-border-dark);
  background-color: var(--felix-bg-dark);
}

.felix-subpage-footer-inner {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

.felix-footer-status {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  color: var(--felix-text-secondary);
}

.felix-footer-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--felix-primary);
  flex-shrink: 0;
}

.felix-footer-links {
  display: flex;
  align-items: center;
  gap: 4px;
}

.felix-footer-link {
  font-size: 12px;
  color: var(--felix-text-secondary);
  text-decoration: none;
  padding: 4px 8px;
  border-radius: 4px;
  transition: color var(--felix-transition);
  opacity: 0.6;
}

.felix-footer-link:hover {
  color: var(--felix-text-primary);
  opacity: 1;
}

html.dark .felix-footer-link:hover {
  color: #ffffff;
}

/* ---- RESPONSIVE ---- */
@media (max-width: 768px) {
  .felix-subpage-nav {
    padding: 0 16px;
  }

  .felix-subpage-nav-links {
    display: none;
  }

  .felix-subpage-main {
    padding: 32px 20px 60px;
  }

  .felix-page-header h1 {
    font-size: 24px;
  }

  .felix-about-grid {
    grid-template-columns: 1fr;
  }

  .felix-stats-row {
    grid-template-columns: 1fr 1fr;
  }

  .felix-subpage-footer-inner {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }

  .felix-nav-buttons {
    flex-direction: column;
    align-items: flex-start;
  }

  .felix-stat-value {
    font-size: 20px;
  }
}

@media (max-width: 480px) {
  .felix-stats-row {
    grid-template-columns: 1fr;
  }

  .felix-subpage-main {
    padding: 24px 16px 48px;
  }

  .felix-qa-answer {
    padding-left: 20px;
  }

  .felix-subpage-footer {
    padding: 16px 20px;
  }
}