:root {
  --bbu2-bg: #11101f;
  --bbu2-bg-alt: #17162b;
  --bbu2-bg-hero: #1b1936;
  --bbu2-surface: #262445;
  --bbu2-border: #383563;
  --bbu2-border-strong: #534f8c;
  --bbu2-ink: #efeff5;
  --bbu2-muted: #c2c0d9;
  --bbu2-accent: #d59843;
  --bbu2-accent-hover: #e5ab56;
  --bbu2-accent2: #17e891;
  --bbu2-warn: #f06a6a;
  --bbu2-on-accent: #111111;
  --bbu2-font-display: "Sora", system-ui, sans-serif;
  --bbu2-font-body: "Nunito Sans", system-ui, sans-serif;
  --bbu2-base: 16px;
  --bbu2-h4: 1.25rem;
  --bbu2-h3: 1.563rem;
  --bbu2-h2: 1.953rem;
  --bbu2-h1: 2.441rem;
  --bbu2-wrap: 1180px;
}

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

html {
  font-size: var(--bbu2-base);
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background-color: var(--bbu2-bg);
  color: var(--bbu2-ink);
  font-family: var(--bbu2-font-body);
  line-height: 1.68;
  overflow-x: clip;
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: var(--bbu2-accent2);
  text-underline-offset: 3px;
  transition: color 0.16s ease, border-color 0.16s ease, background-color 0.16s ease;
}

a:hover {
  color: var(--bbu2-accent);
}

:focus-visible {
  outline: 2px solid var(--bbu2-accent2);
  outline-offset: 3px;
}

h1,
h2,
h3,
h4 {
  font-family: var(--bbu2-font-display);
  color: var(--bbu2-ink);
  line-height: 1.24;
  margin-top: 0;
  font-weight: 700;
  letter-spacing: -0.015em;
}

h1 {
  font-size: clamp(1.9rem, 3.6vw, var(--bbu2-h1));
  margin-bottom: 1rem;
}

h2 {
  font-size: clamp(1.45rem, 2.5vw, var(--bbu2-h2));
  margin-bottom: 0.9rem;
}

h3 {
  font-size: clamp(1.2rem, 1.9vw, var(--bbu2-h3));
  margin-bottom: 0.7rem;
}

h4 {
  font-size: var(--bbu2-h4);
  margin-bottom: 0.55rem;
}

p {
  margin-top: 0;
  margin-bottom: 1.05rem;
  color: var(--bbu2-ink);
}

ul,
ol {
  margin-top: 0;
  margin-bottom: 1.25rem;
  padding-left: 1.35rem;
}

li {
  margin-bottom: 0.5rem;
}

.bbu2-skip {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--bbu2-accent);
  color: var(--bbu2-on-accent);
  padding: 0.75rem 1rem;
  font-weight: 700;
  z-index: 200;
}

.bbu2-skip:focus {
  left: 1rem;
  top: 1rem;
}

.bbu2-wrap {
  width: 100%;
  max-width: var(--bbu2-wrap);
  margin-inline: auto;
  padding-inline: clamp(1rem, 3vw, 2rem);
}

/* Compliance Top Notice (non-blocking) */
.bbu2-notice-strip {
  background-color: var(--bbu2-bg-alt);
  border-bottom: 2px solid var(--bbu2-border);
  padding: 0.5rem 0;
  font-size: 0.875rem;
  color: var(--bbu2-muted);
}

.bbu2-notice-inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 0.5rem 1.25rem;
}

.bbu2-age-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.15rem 0.55rem;
  border: 2px solid var(--bbu2-accent);
  color: var(--bbu2-accent);
  font-family: var(--bbu2-font-display);
  font-weight: 700;
  font-size: 0.8rem;
}

/* Floating Pill Navigation */
.bbu2-header {
  position: sticky;
  top: 0.65rem;
  z-index: 120;
  padding: 0.5rem 0;
}

.bbu2-nav-pill {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.65rem;
  background-color: rgba(23, 22, 43, 0.96);
  border: 2px solid var(--bbu2-border-strong);
  border-radius: 999px;
  padding: 0.4rem 0.75rem 0.4rem 1rem;
  backdrop-filter: blur(8px);
}

.bbu2-brand-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  text-decoration: none;
  color: var(--bbu2-ink);
  min-height: 44px;
  flex-shrink: 0;
}

.bbu2-brand-logo {
  height: 32px;
  width: auto;
  border-radius: 2px;
}

.bbu2-brand-text {
  font-family: var(--bbu2-font-display);
  font-weight: 700;
  font-size: 0.98rem;
  color: var(--bbu2-ink);
}

.bbu2-nav-links {
  display: flex;
  align-items: center;
  flex-wrap: nowrap;
  gap: 0.1rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.bbu2-nav-links a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0.35rem 0.48rem;
  color: var(--bbu2-ink);
  text-decoration: none;
  font-size: 0.86rem;
  font-weight: 600;
  white-space: nowrap;
  border-bottom: 2px solid transparent;
}

.bbu2-nav-links a:hover,
.bbu2-nav-links a[aria-current="page"] {
  color: var(--bbu2-accent);
  border-bottom-color: var(--bbu2-accent);
}

.bbu2-nav-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-shrink: 0;
}

.bbu2-menu-btn {
  display: none;
  align-items: center;
  justify-content: center;
  min-width: 44px;
  min-height: 44px;
  background: var(--bbu2-surface);
  color: var(--bbu2-ink);
  border: 2px solid var(--bbu2-border-strong);
  border-radius: 2px;
  font-family: var(--bbu2-font-display);
  font-weight: 700;
  font-size: 0.9rem;
  padding: 0.4rem 0.75rem;
  cursor: pointer;
}

/* Solid Block CTA Buttons (DNA cta: solid-block-button, sharp 2px) */
.bbu2-btn-primary,
.bbu2-btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  min-height: 44px;
  padding: 0.65rem 1.25rem;
  font-family: var(--bbu2-font-display);
  font-weight: 700;
  font-size: 0.95rem;
  text-decoration: none;
  border-radius: 2px;
  white-space: nowrap;
  cursor: pointer;
}

.bbu2-btn-primary {
  background-color: var(--bbu2-accent);
  color: var(--bbu2-on-accent);
  border: 2px solid var(--bbu2-accent);
}

.bbu2-btn-primary:hover {
  background-color: var(--bbu2-accent-hover);
  border-color: var(--bbu2-accent-hover);
  color: var(--bbu2-on-accent);
}

.bbu2-btn-secondary {
  background-color: var(--bbu2-surface);
  color: var(--bbu2-ink);
  border: 2px solid var(--bbu2-accent2);
}

.bbu2-btn-secondary:hover {
  background-color: var(--bbu2-accent2);
  color: var(--bbu2-on-accent);
}

/* Full-Bleed Stacked Bands */
.bbu2-band {
  padding-block: clamp(2.5rem, 5vw, 4.25rem);
  border-top: 2px solid var(--bbu2-border);
  background-color: var(--bbu2-bg);
}

.bbu2-band-alt {
  padding-block: clamp(2.5rem, 5vw, 4.25rem);
  border-top: 2px solid var(--bbu2-border);
  background-color: var(--bbu2-bg-alt);
}

.bbu2-band-surface {
  padding-block: clamp(2.5rem, 5vw, 4.25rem);
  border-top: 2px solid var(--bbu2-border-strong);
  background-color: var(--bbu2-surface);
}

/* Full-Bleed Gradient Banner Hero */
.bbu2-hero {
  background: linear-gradient(125deg, #11101f 0%, #1b1936 62%, #242148 100%);
  border-top: 2px solid var(--bbu2-accent);
  border-bottom: 2px solid var(--bbu2-border-strong);
  padding-block: clamp(2.25rem, 4.5vw, 4rem);
}

.bbu2-hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr);
  gap: clamp(1.5rem, 4vw, 3rem);
  align-items: center;
}

.bbu2-hero-lead {
  font-size: 1.125rem;
  color: var(--bbu2-muted);
  margin-bottom: 1.5rem;
}

.bbu2-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  margin-bottom: 1.5rem;
}

.bbu2-hero-media {
  border: 2px solid var(--bbu2-accent);
  border-radius: 2px;
  background-color: var(--bbu2-surface);
  overflow: hidden;
}

.bbu2-hero-caption {
  padding: 0.65rem 0.9rem;
  font-size: 0.875rem;
  color: var(--bbu2-muted);
  border-top: 2px solid var(--bbu2-border);
  background-color: var(--bbu2-bg-alt);
}

/* Sharp Outline Cards (0-2px radius, 2px border, zero shadow) */
.bbu2-grid-2 {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.5rem;
}

.bbu2-grid-3 {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1.5rem;
}

.bbu2-card {
  background-color: var(--bbu2-surface);
  border: 2px solid var(--bbu2-border-strong);
  border-radius: 2px;
  padding: 1.35rem;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.bbu2-card-accent {
  border-color: var(--bbu2-accent);
}

.bbu2-card-img {
  border: 2px solid var(--bbu2-border);
  border-radius: 2px;
  margin-bottom: 0.5rem;
}

.bbu2-card-meta {
  font-size: 0.875rem;
  color: var(--bbu2-accent2);
  font-weight: 700;
  font-family: var(--bbu2-font-display);
}

/* Breadcrumbs */
.bbu2-breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.45rem;
  list-style: none;
  padding: 0;
  margin: 0 0 1.25rem 0;
  font-size: 0.9rem;
  color: var(--bbu2-muted);
}

.bbu2-breadcrumbs a {
  color: var(--bbu2-accent2);
  text-decoration: none;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
}

.bbu2-breadcrumbs a:hover {
  text-decoration: underline;
}

/* E-E-A-T & Generative AI Callout Capsules */
.bbu2-expert-box {
  border: 2px solid var(--bbu2-accent);
  border-left-width: 6px;
  background-color: var(--bbu2-bg-alt);
  border-radius: 2px;
  padding: 1.15rem 1.35rem;
  margin-bottom: 1.5rem;
}

.bbu2-tldr-box {
  border: 2px solid var(--bbu2-accent2);
  background-color: var(--bbu2-surface);
  border-radius: 2px;
  padding: 1.2rem 1.35rem;
  margin-bottom: 1.75rem;
}

.bbu2-capsule {
  border-left: 4px solid var(--bbu2-accent2);
  background-color: var(--bbu2-bg-alt);
  padding: 0.9rem 1.15rem;
  margin-bottom: 1.1rem;
  font-weight: 600;
}

.bbu2-tip-box {
  border: 2px solid var(--bbu2-accent2);
  background-color: var(--bbu2-bg);
  border-radius: 2px;
  padding: 1rem 1.2rem;
  margin: 1.25rem 0;
}

.bbu2-warn-box {
  border: 2px solid var(--bbu2-warn);
  background-color: var(--bbu2-bg);
  border-radius: 2px;
  padding: 1rem 1.2rem;
  margin: 1.25rem 0;
}

/* Tables */
.bbu2-table-scroll {
  width: 100%;
  max-width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border: 2px solid var(--bbu2-border-strong);
  border-radius: 2px;
  margin: 1.5rem 0;
}

.bbu2-table {
  width: 100%;
  border-collapse: collapse;
  background-color: var(--bbu2-bg-alt);
  text-align: left;
  font-size: 0.95rem;
}

.bbu2-table th,
.bbu2-table td {
  padding: 0.85rem 1rem;
  border-bottom: 2px solid var(--bbu2-border);
  border-right: 1px solid var(--bbu2-border);
}

.bbu2-table th {
  background-color: var(--bbu2-surface);
  color: var(--bbu2-accent);
  font-family: var(--bbu2-font-display);
  font-weight: 700;
}

/* Steps List */
.bbu2-steps {
  list-style: none;
  padding: 0;
  margin: 1.5rem 0;
  display: grid;
  gap: 1rem;
  counter-reset: bbu2-step;
}

.bbu2-steps li {
  counter-increment: bbu2-step;
  border: 2px solid var(--bbu2-border-strong);
  background-color: var(--bbu2-surface);
  border-radius: 2px;
  padding: 1.1rem 1.25rem;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.95rem;
  align-items: start;
}

.bbu2-steps li::before {
  content: counter(bbu2-step);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  background-color: var(--bbu2-accent);
  color: var(--bbu2-on-accent);
  font-family: var(--bbu2-font-display);
  font-weight: 700;
  border-radius: 2px;
}

/* FAQ Accordion */
.bbu2-faq-list {
  display: grid;
  gap: 0.85rem;
  margin-top: 1.25rem;
}

.bbu2-faq-item {
  border: 2px solid var(--bbu2-border-strong);
  background-color: var(--bbu2-surface);
  border-radius: 2px;
}

.bbu2-faq-item summary {
  padding: 1rem 1.2rem;
  font-family: var(--bbu2-font-display);
  font-weight: 700;
  cursor: pointer;
  list-style: none;
  min-height: 44px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
}

.bbu2-faq-item summary::after {
  content: "+";
  color: var(--bbu2-accent);
  font-size: 1.25rem;
}

.bbu2-faq-item[open] summary::after {
  content: "-";
}

.bbu2-faq-body {
  padding: 0 1.2rem 1.15rem 1.2rem;
  border-top: 1px solid var(--bbu2-border);
  padding-top: 0.9rem;
}

/* Duotone SVG Icon helper */
.bbu2-icon {
  width: 22px;
  height: 22px;
  flex-shrink: 0;
  vertical-align: middle;
}

/* Author / Page Layout Split */
.bbu2-article-shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 310px;
  gap: 2.25rem;
  align-items: start;
}

.bbu2-article {
  min-width: 0;
}

.bbu2-sidebar-box {
  border: 2px solid var(--bbu2-border-strong);
  background-color: var(--bbu2-surface);
  border-radius: 2px;
  padding: 1.25rem;
  margin-bottom: 1.5rem;
}

.bbu2-sidebar-links {
  list-style: none;
  padding: 0;
  margin: 0.75rem 0 0 0;
}

.bbu2-sidebar-links li {
  margin-bottom: 0.35rem;
}

.bbu2-sidebar-links a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  text-decoration: none;
  color: var(--bbu2-ink);
  border-bottom: 1px solid var(--bbu2-border);
  width: 100%;
}

.bbu2-sidebar-links a:hover {
  color: var(--bbu2-accent);
  border-bottom-color: var(--bbu2-accent);
}

/* Accordion Footer */
.bbu2-footer {
  background-color: var(--bbu2-bg-alt);
  border-top: 2px solid var(--bbu2-accent);
  padding-block: 3rem 2rem;
}

.bbu2-footer-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.bbu2-footer-acc {
  border: 2px solid var(--bbu2-border);
  background-color: var(--bbu2-bg);
  border-radius: 2px;
  padding: 0.9rem 1rem;
}

.bbu2-footer-acc summary {
  font-family: var(--bbu2-font-display);
  font-weight: 700;
  color: var(--bbu2-accent);
  cursor: pointer;
  min-height: 44px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.bbu2-footer-links {
  list-style: none;
  padding: 0;
  margin: 0.6rem 0 0 0;
}

.bbu2-footer-links a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  color: var(--bbu2-muted);
  text-decoration: none;
  font-size: 0.92rem;
}

.bbu2-footer-links a:hover {
  color: var(--bbu2-accent2);
}

.bbu2-footer-legal {
  border-top: 2px solid var(--bbu2-border);
  padding-top: 1.5rem;
  font-size: 0.875rem;
  color: var(--bbu2-muted);
}

@media (max-width: 1024px) {
  .bbu2-hero-grid,
  .bbu2-article-shell {
    grid-template-columns: minmax(0, 1fr);
  }
  .bbu2-grid-3 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .bbu2-footer-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .bbu2-nav-links {
    display: none;
    position: absolute;
    left: 1rem;
    right: 1rem;
    top: calc(100% + 0.5rem);
    background-color: var(--bbu2-bg-alt);
    border: 2px solid var(--bbu2-accent);
    border-radius: 2px;
    padding: 0.75rem 1rem;
    flex-direction: column;
    align-items: stretch;
  }
  .bbu2-nav-links.bbu2-open {
    display: flex;
  }
  .bbu2-menu-btn {
    display: inline-flex;
  }
}

@media (max-width: 640px) {
  .bbu2-grid-2,
  .bbu2-grid-3,
  .bbu2-footer-grid {
    grid-template-columns: minmax(0, 1fr);
  }
  .bbu2-nav-pill {
    border-radius: 2px;
    padding: 0.4rem 0.6rem;
    gap: 0.45rem;
  }
  .bbu2-brand-logo {
    height: 28px;
  }
  .bbu2-brand-text {
    display: none;
  }
  .bbu2-nav-actions .bbu2-btn-secondary {
    display: none;
  }
  .bbu2-nav-actions .bbu2-btn-primary {
    padding: 0.5rem 0.8rem;
    font-size: 0.85rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  a {
    transition: none;
  }
}