/* ==========================================================================
   Cloudflare Sovereignty Conversation Framework — Stylesheet
   Rebuilt with relative units, accessibility, immersive interactions,
   collapsible sidebar, and dark theme.
   ========================================================================== */


/* ==========================================================================
   1. Custom Properties
   ========================================================================== */

:root {
  /* ---- Color Palette (Dark Theme) ---- */
  --color-bg:              #0d1117;
  --color-bg-secondary:    #161b22;
  --color-surface:         #21262d;
  --color-border:          #30363d;
  --color-border-hover:    #484f58;
  --color-text:            #e6edf3;
  --color-text-secondary:  #8b949e;
  --color-text-muted:      #6e7681;
  --color-accent:          #f6821f;
  --color-accent-hover:    #ff9a3e;
  --color-accent-subtle:   rgba(246, 130, 31, 0.15);
  --color-accent-glow:     rgba(246, 130, 31, 0.35);
  --color-success:         #3fb950;
  --color-info:            #58a6ff;
  --color-overlay:         rgba(0, 0, 0, 0.6);

  /* ---- Typography ---- */
  --font-stack: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen,
                Ubuntu, Cantarell, "Helvetica Neue", Arial, sans-serif;
  --font-mono:  "SF Mono", "Fira Code", "Fira Mono", Menlo, Consolas,
                "Liberation Mono", monospace;

  /* ---- Layout ---- */
  --sidebar-width-expanded: 15.5rem;
  --sidebar-width-collapsed: 3.5rem;    /* icon-only rail */
  --sidebar-current-width: var(--sidebar-width-expanded);
  --progress-height: 0.1875rem;         /* 3px */
  --content-width: 48rem;               /* ~768px — comfortable reading width with room for grids */

  /* ---- Radii ---- */
  --radius:    0.75rem;
  --radius-sm: 0.5rem;
  --radius-xs: 0.375rem;
  --radius-pill: 1.25rem;

  /* ---- Transitions ---- */
  --transition:       0.25s ease;
  --transition-slow:  0.4s ease;
  --transition-fast:  0.15s ease;
}


/* ==========================================================================
   2. Reset & Base
   ========================================================================== */

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

html {
  scroll-behavior: smooth;
  font-size: 100%; /* 16px base for rem calculations */
}

body {
  font-family: var(--font-stack);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

ul, ol {
  list-style: none;
}

img {
  max-width: 100%;
  display: block;
}

code {
  font-family: var(--font-mono);
  font-size: 0.875em;
  background: var(--color-surface);
  padding: 0.125em 0.375em;
  border-radius: var(--radius-xs);
}


/* ==========================================================================
   3. Accessibility — Skip Link, Focus, Reduced Motion
   ========================================================================== */

/* Skip-to-content link (hidden until focused) */
.skip-to-content {
  position: fixed;
  top: -100%;
  left: 1rem;
  z-index: 2000;
  padding: 0.625rem 1.25rem;
  background: var(--color-accent);
  color: #fff;
  font-weight: 600;
  font-size: 0.875rem;
  border-radius: 0 0 var(--radius-sm) var(--radius-sm);
  text-decoration: none;
  transition: top var(--transition);
}

.skip-to-content:focus {
  top: 0;
  outline: none;
}

/* Global focus-visible outlines */
:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

/* Remove default outline for non-keyboard interactions */
:focus:not(:focus-visible) {
  outline: none;
}

/* Reduced motion: disable animations for users who prefer it */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}


/* ==========================================================================
   4. Links — Animated Underlines
   ========================================================================== */

a {
  color: var(--color-accent);
  text-decoration: none;
  transition: color var(--transition);
}

/* Animated underline for inline links */
a:not([class]) {
  position: relative;
  display: inline;
}

a:not([class])::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 0;
  height: 1px;
  background: var(--color-accent-hover);
  transition: width var(--transition);
}

a:not([class]):hover::after {
  width: 100%;
}

a:hover {
  color: var(--color-accent-hover);
}


/* ==========================================================================
   5. Progress Bar (fixed top)
   ========================================================================== */

.progress-bar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--progress-height);
  background: var(--color-bg-secondary);
  z-index: 1000;
}

.progress-bar__fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--color-accent), var(--color-accent-hover));
  transition: width var(--transition-slow);
  border-radius: 0 1px 1px 0;
}

.progress-bar__text {
  position: fixed;
  top: var(--progress-height);
  right: 1rem;
  font-size: 0.6875rem;
  color: var(--color-text-muted);
  padding: 0.25rem 0.5rem;
  background: var(--color-bg-secondary);
  border-radius: 0 0 var(--radius-sm) var(--radius-sm);
  z-index: 1000;
  transition: opacity var(--transition);
}


/* ==========================================================================
   6. Sidebar — Expanded, Collapsed, and Toggle
   ========================================================================== */

.sidebar {
  position: fixed;
  top: var(--progress-height);
  left: 0;
  width: var(--sidebar-current-width);
  height: calc(100vh - var(--progress-height));
  height: calc(100dvh - var(--progress-height));
  background: var(--color-bg-secondary);
  border-right: 1px solid var(--color-border);
  overflow-y: auto;
  overflow-x: hidden;
  z-index: 900;
  transition: width 0.3s ease;
  display: flex;
  flex-direction: column;
}

/* Scrollbar styling for sidebar */
.sidebar::-webkit-scrollbar {
  width: 0.25rem;
}

.sidebar::-webkit-scrollbar-track {
  background: transparent;
}

.sidebar::-webkit-scrollbar-thumb {
  background: var(--color-border);
  border-radius: var(--radius-pill);
}

/* ---- Sidebar Header ---- */
.sidebar__header {
  padding: 1.25rem 1rem 0.75rem;
  border-bottom: 1px solid var(--color-border);
  position: relative;
  flex-shrink: 0;
}

.sidebar__logo {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-text);
  white-space: nowrap;
  overflow: hidden;
  transition: opacity var(--transition);
}

.sidebar__logo-icon {
  width: 1.75rem;
  height: 1.75rem;
  background: var(--color-accent);
  border-radius: var(--radius-xs);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.75rem;
  color: #fff;
  flex-shrink: 0;
}

/* ---- Sidebar Toggle Button ---- */
.sidebar__toggle {
  display: none; /* shown on desktop via media query */
  position: absolute;
  top: 50%;
  right: 0.625rem;
  transform: translateY(-50%);
  width: 1.625rem;
  height: 1.625rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 50%;
  color: var(--color-text-muted);
  cursor: pointer;
  align-items: center;
  justify-content: center;
  transition: background var(--transition), color var(--transition),
              border-color var(--transition);
  padding: 0;
}

.sidebar__toggle:hover {
  background: var(--color-accent-subtle);
  color: var(--color-accent);
  border-color: var(--color-accent);
}

.sidebar__toggle::before {
  content: "";
  display: block;
  width: 0.375rem;
  height: 0.375rem;
  border-left: 2px solid currentColor;
  border-bottom: 2px solid currentColor;
  transform: rotate(45deg);
  margin-left: 0.125rem;
  transition: transform 0.3s ease;
}

/* ---- Sidebar Nav ---- */
.sidebar__nav {
  flex: 1;
  padding: 0.5rem 0;
  overflow-y: auto;
}

.sidebar__link {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  padding: 0.625rem 1rem;
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
  border-left: 3px solid transparent;
  cursor: pointer;
  white-space: nowrap;
  overflow: hidden;
  transition: color var(--transition), background var(--transition),
              border-color var(--transition), padding var(--transition);
}

.sidebar__link:hover {
  color: var(--color-text);
  background: rgba(255, 255, 255, 0.04);
  text-decoration: none;
}

.sidebar__link--active {
  color: var(--color-accent);
  border-left-color: var(--color-accent);
  background: var(--color-accent-subtle);
}

/* Number badges */
.sidebar__link-number {
  width: 1.375rem;
  height: 1.375rem;
  border-radius: 50%;
  background: var(--color-surface);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.6875rem;
  font-weight: 600;
  flex-shrink: 0;
  transition: background var(--transition), color var(--transition),
              box-shadow var(--transition);
}

.sidebar__link--visited .sidebar__link-number {
  background: var(--color-accent);
  color: #fff;
}

.sidebar__link--active .sidebar__link-number {
  background: var(--color-accent);
  color: #fff;
  box-shadow: 0 0 0.5rem var(--color-accent-glow);
}

/* ---- Sidebar Footer ---- */
.sidebar__footer {
  padding: 0.75rem 1rem;
  border-top: 1px solid var(--color-border);
  font-size: 0.6875rem;
  color: var(--color-text-muted);
  line-height: 1.5;
  flex-shrink: 0;
  white-space: normal;
  overflow: hidden;
}

.sidebar__footer-version,
.sidebar__footer-date {
  display: block;
}

.sidebar__footer-disclaimer {
  display: block;
  margin-top: 0.375rem;
  padding-top: 0.375rem;
  border-top: 1px solid var(--color-border);
  font-size: 0.625rem;
  color: var(--color-text-muted);
  opacity: 0.85;
  line-height: 1.5;
}

/* ---- Collapsed State (desktop) ---- */
body.sidebar-collapsed {
  --sidebar-current-width: var(--sidebar-width-collapsed);
}

.sidebar--collapsed {
  width: var(--sidebar-width-collapsed);
}

/* In collapsed state, hide link text and logo text */
.sidebar--collapsed .sidebar__logo {
  justify-content: center;
}

.sidebar--collapsed .sidebar__logo-text {
  display: none;
}

.sidebar--collapsed .sidebar__link {
  justify-content: center;
  padding-left: 0;
  padding-right: 0;
  border-left-width: 0;
}

/* Hide all text in sidebar links when collapsed — show only the badge */
.sidebar--collapsed .sidebar__link-text {
  display: none;
}

/* Hide footer text in collapsed state */
.sidebar--collapsed .sidebar__footer {
  text-align: center;
  padding: 0.5rem 0.25rem;
  font-size: 0;
}

.sidebar--collapsed .sidebar__footer-version,
.sidebar--collapsed .sidebar__footer-date,
.sidebar--collapsed .sidebar__footer-disclaimer {
  display: none;
}

/* Flip chevron when collapsed — point right to indicate "expand" */
.sidebar--collapsed .sidebar__toggle::before {
  transform: rotate(-135deg);
  margin-left: -0.0625rem;
}


/* ==========================================================================
   7. Mobile — Hamburger, Overlay
   ========================================================================== */

.hamburger {
  display: none;
  position: fixed;
  top: calc(var(--progress-height) + 0.5rem);
  left: 0.75rem;
  z-index: 950;
  width: 2.5rem;
  height: 2.5rem;
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 0.25rem;
  transition: background var(--transition);
}

.hamburger:hover {
  background: var(--color-surface);
}

.hamburger span {
  display: block;
  width: 1.125rem;
  height: 2px;
  background: var(--color-text);
  transition: all 0.3s ease;
  border-radius: 1px;
}

.hamburger--open span:nth-child(1) {
  transform: rotate(45deg) translate(0.25rem, 0.25rem);
}

.hamburger--open span:nth-child(2) {
  opacity: 0;
}

.hamburger--open span:nth-child(3) {
  transform: rotate(-45deg) translate(0.25rem, -0.25rem);
}

.sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: var(--color-overlay);
  z-index: 850;
  backdrop-filter: blur(0.125rem);
}


/* ==========================================================================
   8. Main Content Area
   ========================================================================== */

.main {
  margin-left: var(--sidebar-current-width);
  min-height: 100vh;
  min-height: 100dvh;
  padding: 3rem 2rem 5rem;
  transition: margin-left 0.3s ease;
}

.main__inner {
  max-width: var(--content-width);
  width: 100%;
  margin: 0 auto;
}


/* ==========================================================================
   9. Sections — Fade-in, Labels, Titles, Descriptions, Dividers
   ========================================================================== */

.section {
  padding: 4rem 0 3rem;
  opacity: 0;
  transform: translateY(1.25rem);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.section + .section {
  border-top: 1px solid var(--color-border);
}

.section--visible {
  opacity: 1;
  transform: translateY(0);
}

.section__label {
  display: inline-block;
  font-size: 0.6875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-accent);
  margin-bottom: 0.5rem;
}

.section__title {
  font-size: 1.75rem;
  font-weight: 700;
  margin-bottom: 0.625rem;
  line-height: 1.25;
  letter-spacing: -0.01em;
}

.section__subtitle {
  font-size: 1rem;
  color: var(--color-text-secondary);
  margin-bottom: 1.75rem;
  line-height: 1.6;
}

.section__description {
  font-size: 0.9375rem;
  color: var(--color-text-secondary);
  margin-bottom: 1.75rem;
  line-height: 1.7;
}

.section__subtitle--sm {
  font-size: 1rem;
  font-weight: 600;
  margin: 1.5rem 0 0.75rem;
  color: var(--color-text);
}

.section__divider {
  border: none;
  border-top: 1px solid var(--color-border);
  margin: 2.5rem 0;
}

/* ---- Card Links ---- */
.card__links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 0.75rem;
}

.card__links a {
  font-size: 0.8125rem;
}


/* ==========================================================================
   10. Hero Section — Gradient Text
   ========================================================================== */

.hero {
  text-align: center;
  padding: 4rem 0 3rem;
}

.hero .section__title {
  font-size: 2.25rem;
  background: linear-gradient(135deg, var(--color-text) 30%, var(--color-accent) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

.hero .section__subtitle {
  margin: 0.75rem auto 1.25rem;
  text-align: center;
}

.hero .section__description {
  margin: 0 auto 1.75rem;
  text-align: center;
}


/* ==========================================================================
   11. Cards — Grid, Hover Glow + Transform + Shadow
   ========================================================================== */

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(16rem, 1fr));
  gap: 1.25rem;
  margin: 1.5rem 0;
}

.card-grid--two {
  grid-template-columns: repeat(auto-fit, minmax(18rem, 1fr));
}

.card-grid--three {
  grid-template-columns: repeat(3, 1fr);
}

.card {
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.375rem;
  transition: border-color var(--transition), transform var(--transition),
              box-shadow var(--transition);
}

.card:hover {
  border-color: var(--color-border-hover);
  transform: translateY(-2px);
  box-shadow: 0 0.5rem 1.5rem rgba(0, 0, 0, 0.2);
}

.card__icon {
  width: 2.5rem;
  height: 2.5rem;
  border-radius: var(--radius-sm);
  background: var(--color-accent-subtle);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 0.75rem;
  font-size: 1.25rem;
}

.card__title {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.card__text {
  font-size: 0.85rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
  margin-bottom: 0.75rem;
}

.card__link {
  font-size: 0.8125rem;
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
}

.card__link::after {
  content: "\2192";
  transition: transform var(--transition);
}

.card__link:hover::after {
  transform: translateX(0.25rem);
}

.card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.375rem;
  margin-top: 0.5rem;
}


/* ==========================================================================
   12. Callout Boxes
   ========================================================================== */

.callout {
  background: var(--color-accent-subtle);
  border: 1px solid rgba(246, 130, 31, 0.3);
  border-left: 0.25rem solid var(--color-accent);
  border-radius: var(--radius-sm);
  padding: 1rem 1.25rem;
  margin: 1.25rem 0;
  font-size: 0.9rem;
  line-height: 1.6;
}

.callout--info {
  background: rgba(88, 166, 255, 0.1);
  border-color: rgba(88, 166, 255, 0.3);
  border-left-color: var(--color-info);
}

.callout__title {
  font-weight: 600;
  margin-bottom: 0.25rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}


/* ==========================================================================
   13. Tags / Badges — Glow on Hover
   ========================================================================== */

.tag {
  display: inline-block;
  padding: 0.1875rem 0.625rem;
  font-size: 0.75rem;
  font-weight: 500;
  border-radius: var(--radius-pill);
  background: var(--color-surface);
  color: var(--color-text-secondary);
  border: 1px solid var(--color-border);
  transition: box-shadow var(--transition), border-color var(--transition),
              background var(--transition);
  cursor: default;
}

.tag:hover {
  border-color: var(--color-border-hover);
  box-shadow: 0 0 0.5rem rgba(230, 237, 243, 0.08);
}

.tag--accent {
  background: var(--color-accent-subtle);
  color: var(--color-accent);
  border-color: rgba(246, 130, 31, 0.3);
}

.tag--accent:hover {
  box-shadow: 0 0 0.625rem var(--color-accent-glow);
  border-color: var(--color-accent);
}

.badge-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 1rem 0;
}


/* ==========================================================================
   14. Flip Cards (Discovery Section)
   ========================================================================== */

.flip-card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(17.5rem, 1fr));
  gap: 1rem;
  margin: 1.25rem 0;
}

.flip-card {
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
  cursor: pointer;
  transition: border-color var(--transition), box-shadow var(--transition),
              transform var(--transition);
}

.flip-card:hover {
  border-color: var(--color-border-hover);
  transform: translateY(-1px);
  box-shadow: 0 0.25rem 0.75rem rgba(0, 0, 0, 0.15);
}

.flip-card--open {
  border-color: var(--color-accent);
  box-shadow: 0 0 0.75rem var(--color-accent-glow);
}

.flip-card__front {
  padding: 1.25rem;
}

.flip-card__number {
  font-size: 0.6875rem;
  font-weight: 600;
  color: var(--color-accent);
  margin-bottom: 0.5rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.flip-card__question {
  font-size: 0.9375rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  line-height: 1.4;
}

.flip-card__hint {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.flip-card__back {
  padding: 0 1.25rem 1.25rem;
  display: none;
  border-top: 1px solid var(--color-border);
  background: var(--color-surface);
}

.flip-card--open .flip-card__back {
  display: block;
  padding-top: 1rem;
}

.flip-card__answer {
  font-size: 0.85rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
  margin-bottom: 0.625rem;
}

.flip-card__links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.flip-card__links a {
  font-size: 0.8125rem;
}


/* ==========================================================================
   15. Tabs
   ========================================================================== */

.tabs {
  margin: 1.25rem 0;
}

.tabs__header {
  display: flex;
  gap: 2px;
  border-bottom: 1px solid var(--color-border);
  margin-bottom: 0;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}

.tabs__header::-webkit-scrollbar {
  display: none;
}

.tabs__btn {
  padding: 0.625rem 1.25rem;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  background: transparent;
  border: none;
  border-bottom: 2px solid transparent;
  cursor: pointer;
  transition: color var(--transition), border-color var(--transition);
  white-space: nowrap;
  font-family: var(--font-stack);
}

.tabs__btn:hover {
  color: var(--color-text);
}

.tabs__btn--active {
  color: var(--color-accent);
  border-bottom-color: var(--color-accent);
}

.tabs__panel {
  display: none;
  padding: 1.25rem 0;
}

.tabs__panel--active {
  display: block;
}


/* ==========================================================================
   16. Accordion (Objection Handling)
   ========================================================================== */

.accordion {
  margin: 1.25rem 0;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.accordion__item {
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  overflow: hidden;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.accordion__item--open {
  border-color: var(--color-accent);
  box-shadow: 0 0 0.5rem var(--color-accent-glow);
}

.accordion__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.25rem;
  cursor: pointer;
  transition: background var(--transition);
  gap: 0.75rem;
}

.accordion__header:hover {
  background: rgba(255, 255, 255, 0.02);
}

.accordion__number {
  width: 1.625rem;
  height: 1.625rem;
  border-radius: 50%;
  background: var(--color-surface);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-text-secondary);
  flex-shrink: 0;
  transition: background var(--transition), color var(--transition);
}

.accordion__item--open .accordion__number {
  background: var(--color-accent);
  color: #fff;
}

.accordion__question {
  flex: 1;
  font-size: 0.9rem;
  font-weight: 500;
  line-height: 1.4;
}

.accordion__chevron {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 1.25rem;
  height: 1.25rem;
  color: var(--color-text-muted);
  transition: transform 0.3s ease, color 0.25s ease;
  flex-shrink: 0;
}

.accordion__chevron::before {
  content: "";
  display: block;
  width: 0.45rem;
  height: 0.45rem;
  border-right: 2px solid currentColor;
  border-bottom: 2px solid currentColor;
  transform: rotate(45deg);
  margin-top: -0.125rem;
}

.accordion__item--open .accordion__chevron {
  transform: rotate(180deg);
  color: var(--color-accent);
}

.accordion__body {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease;
}

.accordion__item--open .accordion__body {
  max-height: 50rem; /* 800px — generous to accommodate discovery questions with callouts */
}

.accordion__content {
  padding: 0.25rem 1.25rem 1.5rem;
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
}

.accordion__content p + p {
  margin-top: 0.75rem;
}

.accordion__content a {
  font-size: 0.8125rem;
}

/* ---- Discovery Accordion Variant ---- */
.accordion__question-wrap {
  flex: 1;
  min-width: 0;
}

.accordion__concern {
  display: block;
  font-size: 0.6875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-accent);
  margin-bottom: 0.1875rem;
}

.accordion__response-title {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 0.5rem;
}

.accordion__list {
  margin: 0.75rem 0;
  padding-left: 1.25rem;
}

.accordion__list li {
  list-style: disc;
  margin-bottom: 0.5rem;
  line-height: 1.6;
}

.accordion__list li::marker {
  color: var(--color-accent);
}

.accordion__links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 0.75rem;
}

.accordion__links a {
  font-size: 0.8125rem;
  font-weight: 500;
}


/* ==========================================================================
   17. Expandable Sections (Technical Controls)
   ========================================================================== */

.expandable {
  margin: 0.5rem 0;
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  overflow: hidden;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.expandable--open {
  border-color: var(--color-accent);
  box-shadow: 0 0 0.5rem var(--color-accent-glow);
}

.expandable__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.875rem 1.125rem;
  cursor: pointer;
  transition: background var(--transition);
  gap: 0.625rem;
}

.expandable__header:hover {
  background: rgba(255, 255, 255, 0.02);
}

.expandable__title {
  font-size: 0.9375rem;
  font-weight: 600;
}

.expandable__badge {
  font-size: 0.6875rem;
  padding: 0.125rem 0.5rem;
  border-radius: var(--radius-pill);
  background: var(--color-accent-subtle);
  color: var(--color-accent);
  font-weight: 500;
  white-space: nowrap;
}

.expandable__chevron {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 1.25rem;
  height: 1.25rem;
  color: var(--color-text-muted);
  transition: transform 0.3s ease, color 0.25s ease;
  flex-shrink: 0;
}

.expandable__chevron::before {
  content: "";
  display: block;
  width: 0.45rem;
  height: 0.45rem;
  border-right: 2px solid currentColor;
  border-bottom: 2px solid currentColor;
  transform: rotate(45deg);
  margin-top: -0.125rem;
}

.expandable--open .expandable__chevron {
  transform: rotate(180deg);
  color: var(--color-accent);
}

.expandable__body {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease;
}

.expandable--open .expandable__body {
  max-height: 75rem; /* 1200px */
}

.expandable__content {
  padding: 0.25rem 1.25rem 1.25rem;
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
}

.expandable__content ul {
  margin: 0.5rem 0;
  padding-left: 1.25rem;
}

.expandable__content li {
  list-style: disc;
  margin-bottom: 0.375rem;
}

.expandable__content li::marker {
  color: var(--color-accent);
}


/* ==========================================================================
   18. Quick Reference — Categories with Line Decorators
   ========================================================================== */

.ref-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(10rem, 1fr));
  gap: 0.75rem;
  margin: 1rem 0;
}

.ref-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 0.625rem 0.875rem;
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
  text-align: center;
}

.ref-category {
  margin-bottom: 1.25rem;
}

.ref-category__title {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.075em;
  color: var(--color-accent);
  margin-bottom: 0.625rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

/* Line decorator after category title */
.ref-category__title::after {
  content: "";
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, var(--color-border), transparent);
}

.ref-items {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.ref-item {
  padding: 0.375rem 0.875rem;
  font-size: 0.8125rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  color: var(--color-text-secondary);
  transition: border-color var(--transition), box-shadow var(--transition),
              color var(--transition);
}

.ref-item:hover {
  border-color: var(--color-accent);
  color: var(--color-text);
  box-shadow: 0 0 0.5rem var(--color-accent-glow);
}


/* ==========================================================================
   19. Resource Grid — Cards with Hover Lift + Accent Border Glow
   ========================================================================== */

.resource-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(15.625rem, 1fr));
  gap: 0.75rem;
  margin: 1rem 0;
}

.resource-card {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.875rem 1rem;
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  color: var(--color-text);
  transition: border-color var(--transition), transform var(--transition),
              box-shadow var(--transition), color var(--transition);
}

.resource-card:hover {
  border-color: var(--color-border-hover);
  transform: translateY(-1px);
  box-shadow: 0 0.25rem 0.75rem rgba(0, 0, 0, 0.2);
  text-decoration: none;
  color: var(--color-text);
}

.resource-card__icon {
  width: 2rem;
  height: 2rem;
  border-radius: var(--radius-xs);
  background: var(--color-accent-subtle);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-size: 0.9rem;
}


/* ==========================================================================
   20. Subsection Headers
   ========================================================================== */

.subsection {
  margin-top: 2rem;
}

.subsection__title {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.subsection__text {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  margin-bottom: 1rem;
  line-height: 1.6;
}


/* ==========================================================================
   21. Lists — Generic Styled Lists and Caveats
   ========================================================================== */

.list {
  margin: 0.75rem 0;
  padding-left: 1.25rem;
}

.list li {
  list-style: disc;
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  margin-bottom: 0.5rem;
  line-height: 1.6;
}

.list li::marker {
  color: var(--color-accent);
}

.caveats {
  margin: 0.75rem 0;
  padding-left: 1.25rem;
}

.caveats li {
  list-style: disc;
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
  margin-bottom: 0.25rem;
  line-height: 1.5;
}

.caveats li::marker {
  color: var(--color-text-muted);
}


/* ==========================================================================
   22. Tables — Modern Dark-Themed Data Tables
   ========================================================================== */

.table-wrap {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  margin: 1rem 0;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
}

.table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.8125rem;
  line-height: 1.5;
}

.table thead {
  background: var(--color-surface);
}

.table th {
  padding: 0.625rem 0.875rem;
  text-align: left;
  font-weight: 600;
  font-size: 0.75rem;
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  border-bottom: 1px solid var(--color-border);
  white-space: nowrap;
}

.table td {
  padding: 0.625rem 0.875rem;
  color: var(--color-text-secondary);
  border-bottom: 1px solid var(--color-border);
  vertical-align: top;
}

.table tbody tr:last-child td {
  border-bottom: none;
}

.table tbody tr {
  transition: background var(--transition-fast);
}

.table tbody tr:hover {
  background: rgba(255, 255, 255, 0.02);
}


/* ==========================================================================
   22b. Badges — Status Indicators for Tables
   ========================================================================== */

.badge {
  display: inline-block;
  padding: 0.125rem 0.5rem;
  font-size: 0.6875rem;
  font-weight: 500;
  border-radius: var(--radius-pill);
  white-space: nowrap;
}

.badge--green {
  background: rgba(63, 185, 80, 0.15);
  color: var(--color-success);
  border: 1px solid rgba(63, 185, 80, 0.3);
}

.badge--yellow {
  background: rgba(246, 130, 31, 0.15);
  color: var(--color-accent);
  border: 1px solid rgba(246, 130, 31, 0.3);
}

.badge--red {
  background: rgba(248, 81, 73, 0.15);
  color: #f85149;
  border: 1px solid rgba(248, 81, 73, 0.3);
}


/* ==========================================================================
   22c. Details/Summary Reset — Override Native Browser Triangles
   ========================================================================== */

details {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-bg-secondary);
  margin: 0.75rem 0;
}

details summary {
  cursor: pointer;
  list-style: none;
  padding: 0.875rem 1.125rem;
  font-weight: 600;
  font-size: 0.9375rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
}

details summary::-webkit-details-marker,
details summary::marker {
  display: none;
  content: "";
}

details[open] > summary {
  border-bottom: 1px solid var(--color-border);
}


/* ==========================================================================
   23a. Strategic Ally Callout — Highlighted narrative box
   ========================================================================== */

.callout--strategic-ally {
  background: linear-gradient(135deg, rgba(246, 130, 31, 0.12) 0%, rgba(246, 130, 31, 0.04) 100%);
  border: 1px solid rgba(246, 130, 31, 0.4);
  border-left: 0.3rem solid var(--color-accent);
  border-radius: var(--radius-sm);
  padding: 1.25rem 1.5rem;
  margin: 1.5rem 0;
  font-size: 0.9rem;
  line-height: 1.6;
}

.callout--strategic-ally .callout__title {
  font-size: 1.0625rem;
  color: var(--color-accent);
}

.callout--strategic-ally .accordion__list {
  margin: 0.75rem 0 0;
  padding-left: 1.25rem;
}

.callout--strategic-ally .accordion__list li {
  list-style: disc;
  margin-bottom: 0.5rem;
  line-height: 1.6;
  font-size: 0.875rem;
  color: var(--color-text-secondary);
}

.callout--strategic-ally .accordion__list li::marker {
  color: var(--color-accent);
}


/* ==========================================================================
   23b. Sovereignty Matrix — Product Category Visualization
   ========================================================================== */

.sovereignty-matrix {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  margin: 1.25rem 0;
}

.sovereignty-matrix__col {
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.sovereignty-matrix__header {
  padding: 1rem 1.125rem;
  border-bottom: 1px solid var(--color-border);
}

.sovereignty-matrix__header--app {
  border-top: 3px solid var(--color-accent);
}

.sovereignty-matrix__header--cf1 {
  border-top: 3px solid var(--color-info);
}

.sovereignty-matrix__header--dev {
  border-top: 3px solid var(--color-success);
}

.sovereignty-matrix__title {
  font-size: 0.9375rem;
  font-weight: 600;
  margin-bottom: 0.25rem;
}

.sovereignty-matrix__desc {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  line-height: 1.4;
}

.sovereignty-matrix__section {
  padding: 0.75rem 1.125rem;
  border-bottom: 1px solid var(--color-border);
}

.sovereignty-matrix__section:last-of-type {
  border-bottom: none;
}

.sovereignty-matrix__label {
  display: block;
  font-size: 0.6875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.075em;
  color: var(--color-text-muted);
  margin-bottom: 0.5rem;
}

.sovereignty-matrix__items {
  display: flex;
  flex-wrap: wrap;
  gap: 0.375rem;
}

.sovereignty-matrix__items .badge {
  cursor: default;
  font-size: 0.6875rem;
}

.sovereignty-matrix__note {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  padding: 0.625rem 1.125rem;
  line-height: 1.5;
  margin-top: auto;
  border-top: 1px solid var(--color-border);
  font-style: italic;
}

/* Ref category description (inline label) */
.ref-category__desc {
  font-weight: 400;
  font-size: 0.6875rem;
  color: var(--color-text-muted);
  text-transform: none;
  letter-spacing: 0;
  margin-left: 0.25rem;
}

/* Responsive: sovereignty matrix to single column on tablet/mobile */
@media (max-width: 64rem) {
  .sovereignty-matrix {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 40rem) {
  .sovereignty-matrix {
    grid-template-columns: 1fr;
  }
}


/* ==========================================================================
   23c. Callout Warning — used for caveats
   ========================================================================== */

.callout--warning {
  background: rgba(246, 130, 31, 0.08);
  border: 1px solid rgba(246, 130, 31, 0.25);
  border-left: 0.25rem solid var(--color-accent);
}

.callout--success {
  background: rgba(63, 185, 80, 0.08);
  border: 1px solid rgba(63, 185, 80, 0.25);
  border-left: 0.25rem solid var(--color-success);
}

.callout--success .callout__title {
  color: var(--color-success);
}


/* ==========================================================================
   24. Disclaimer Footer
   ========================================================================== */

.disclaimer {
  margin-top: 3rem;
  padding: 1.5rem 0;
  border-top: 1px solid var(--color-border);
  font-size: 0.75rem;
  color: var(--color-text-muted);
  line-height: 1.5;
  text-align: center;
  max-width: 40rem;
  margin-left: auto;
  margin-right: auto;
}

.disclaimer p {
  margin-bottom: 0.375rem;
}

.disclaimer a {
  color: var(--color-text-secondary);
}

.disclaimer a:hover {
  color: var(--color-accent);
}


/* ==========================================================================
   23. Responsive — Desktop Sidebar Toggle, Tablet, Mobile
   ========================================================================== */

/* Desktop: show sidebar toggle */
@media (min-width: 48.0625rem) { /* > 769px */
  .sidebar__toggle {
    display: flex;
  }
}

/* Tablet: 3-col grid becomes 2-col, then 1-col */
@media (max-width: 64rem) { /* 1024px */
  .card-grid--three {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 40rem) { /* 640px */
  .card-grid--three {
    grid-template-columns: 1fr;
  }
}

/* Mobile breakpoint */
@media (max-width: 48rem) { /* 768px */
  /* Show hamburger, hide sidebar toggle */
  .hamburger {
    display: flex;
  }

  .sidebar__toggle {
    display: none !important;
  }

  /* Sidebar: off-screen by default */
  .sidebar {
    width: var(--sidebar-width-expanded);
    transform: translateX(-100%);
  }

  /* Override collapsed state on mobile: always use expanded appearance */
  .sidebar.sidebar--collapsed {
    width: var(--sidebar-width-expanded);
  }

  .sidebar--open {
    transform: translateX(0);
  }

  .sidebar-overlay--visible {
    display: block;
  }

  /* Main content: no margin */
  .main {
    margin-left: 0;
    padding: 3.5rem 1.25rem 3.75rem;
  }

  /* Typography scale-down */
  .hero .section__title {
    font-size: 1.5rem;
  }

  .section__title {
    font-size: 1.375rem;
  }

  /* Grids: single column */
  .card-grid,
  .card-grid--two,
  .card-grid--three {
    grid-template-columns: 1fr;
  }

  .resource-grid {
    grid-template-columns: 1fr;
  }

  .ref-grid {
    grid-template-columns: repeat(auto-fill, minmax(8rem, 1fr));
  }

  /* Smaller tabs */
  .tabs__btn {
    padding: 0.5rem 0.875rem;
    font-size: 0.8125rem;
  }

  /* Hide progress text */
  .progress-bar__text {
    display: none;
  }
}

/* Small mobile */
@media (max-width: 30rem) { /* 480px */
  .hero .section__title {
    font-size: 1.375rem;
  }

  .section {
    padding: 2.5rem 0 1.25rem;
  }

  .card {
    padding: 1rem;
  }

  .accordion__header {
    padding: 0.75rem 1rem;
  }

  .expandable__header {
    padding: 0.75rem 0.875rem;
  }
}