:root {
  --bg: #050507;
  --panel: #0C0C12;
  --raised: #14141C;
  --border: rgba(255,255,255,0.06);
  --border-8: rgba(255,255,255,0.08);
  --text-primary: #ECECEC;
  --text-secondary: #8A8A98;
  --text-muted: #5C5C68;
  --text-body: #C8C8D0;
  --accent-1: #8B5CF6;
  --accent-2: #6366F1;
  --accent-3: #38BDF8;
  --glass-bg: rgba(255,255,255,0.035);
  --glass-border: rgba(255,255,255,0.08);
  --grad: linear-gradient(90deg, #8B5CF6, #6366F1, #38BDF8);
  --font-ui: 'Inter', sans-serif;
  --font-display: 'Instrument Serif', serif;
  --font-mono: 'JetBrains Mono', monospace;
}

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

html {
  scroll-behavior: smooth;
}

body {
  background: var(--bg);
  color: var(--text-primary);
  font-family: var(--font-ui);
  font-weight: 400;
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
}

/* BACKGROUND */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background: radial-gradient(ellipse 60% 55% at 90% -5%, rgba(99,68,160,0.28) 0%, transparent 70%);
  pointer-events: none;
  z-index: 0;
}

.dot-grid {
  position: fixed;
  inset: 0;
  background-image: radial-gradient(circle, rgba(255,255,255,0.045) 1px, transparent 1px);
  background-size: 28px 28px;
  pointer-events: none;
  z-index: 0;
}

.grain {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 1;
  opacity: 0.03;
}

/* NAV */
.top-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 72px;
  background: rgba(5,5,7,0.75);
  backdrop-filter: blur(20px) saturate(140%);
  -webkit-backdrop-filter: blur(20px) saturate(140%);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 40px;
  z-index: 100;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
}

.nav-wordmark {
  font-family: var(--font-ui);
  font-weight: 500;
  font-size: 15px;
  letter-spacing: -0.01em;
  background: var(--grad);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav-breadcrumb {
  font-size: 13px;
  color: var(--text-secondary);
  font-weight: 400;
  letter-spacing: 0.01em;
}

.nav-right {
  display: flex;
  align-items: center;
  gap: 16px;
}

.nav-back-link {
  font-size: 13px;
  font-weight: 500;
  background: var(--grad);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  text-decoration: none;
  letter-spacing: -0.01em;
  transition: opacity 0.2s;
}

.nav-back-link:hover {
  opacity: 0.75;
}

.print-btn {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: background 0.2s, border-color 0.2s;
  color: var(--text-secondary);
}

.print-btn:hover {
  background: rgba(255,255,255,0.07);
  border-color: rgba(255,255,255,0.14);
  color: var(--text-primary);
}

.print-btn-text {
  border-radius: 999px;
  font-family: var(--font-ui);
  font-size: 12px;
  font-weight: 500;
  min-width: 54px;
  padding: 0 12px;
  width: auto;
}

.scroll-progress-bar {
  position: absolute;
  bottom: -1px;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--grad);
  transform-origin: left center;
  transform: scaleX(0);
  transition: transform 0.08s linear;
}

/* PAGE HEADER */
.page-header {
  max-width: 720px;
  margin: 0 auto;
  padding: 160px 24px 64px;
  text-align: center;
  position: relative;
  z-index: 2;
  background: transparent;
  border: 0;
  border-radius: 0;
  box-shadow: none;
}

.eyebrow {
  font-size: 11px;
  font-family: var(--font-ui);
  font-weight: 500;
  letter-spacing: 0.18em;
  color: var(--text-secondary);
  text-transform: uppercase;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

.eyebrow-star {
  font-size: 10px;
  background: var(--grad);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.page-title {
  font-family: var(--font-ui);
  font-size: 56px;
  font-weight: 300;
  letter-spacing: -0.02em;
  line-height: 1.1;
  color: var(--text-primary);
  margin-top: 16px;
}

.page-title em {
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 400;
  color: var(--text-primary);
}

.page-subtitle {
  font-size: 16px;
  color: var(--text-secondary);
  max-width: 520px;
  margin: 20px auto 0;
  line-height: 1.55;
}

.meta-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  margin-top: 32px;
  flex-wrap: wrap;
}

.meta-sep {
  color: var(--text-muted);
  font-size: 12px;
  font-family: var(--font-mono);
}

.meta-pill {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  background: var(--glass-bg);
  border: 1px solid var(--border-8);
  border-radius: 999px;
  height: 28px;
  padding: 0 12px;
  display: flex;
  align-items: center;
  white-space: nowrap;
}

/* MOBILE ANCHOR BAR */
.mobile-anchor-bar {
  display: none;
  overflow-x: auto;
  padding: 12px 24px;
  gap: 8px;
  border-bottom: 1px solid var(--border);
  background: rgba(5,5,7,0.9);
  backdrop-filter: blur(12px);
  position: sticky;
  top: 72px;
  z-index: 50;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}

.mobile-anchor-bar::-webkit-scrollbar {
  display: none;
}

.mobile-anchor-item {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-secondary);
  text-decoration: none;
  white-space: nowrap;
  padding: 4px 10px;
  border-radius: 4px;
  border: 1px solid var(--border);
  transition: color 0.2s, border-color 0.2s;
  flex-shrink: 0;
}

.mobile-anchor-item:hover {
  color: var(--text-primary);
  border-color: var(--border-8);
}

.mobile-anchor-item.active {
  color: var(--accent-1);
  border-color: rgba(139,92,246,0.3);
}

/* TWO-COLUMN BODY */
.body-wrapper {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 80px 120px;
  display: flex;
  gap: 0;
  position: relative;
  z-index: 2;
}

/* MINI-TOC */
.mini-toc {
  width: 240px;
  flex-shrink: 0;
  position: sticky;
  top: 96px;
  align-self: flex-start;
  max-height: calc(100vh - 120px);
  overflow-y: auto;
  scrollbar-width: none;
  padding-right: 8px;
}

.mini-toc::-webkit-scrollbar {
  display: none;
}

.toc-inner {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  backdrop-filter: blur(20px) saturate(140%);
  -webkit-backdrop-filter: blur(20px) saturate(140%);
  border-radius: 12px;
  padding: 20px 0 16px;
}

.toc-label {
  font-size: 11px;
  font-family: var(--font-ui);
  font-weight: 500;
  letter-spacing: 0.18em;
  color: var(--text-muted);
  text-transform: uppercase;
  padding: 0 20px 16px;
  display: block;
  border-bottom: 1px solid var(--border);
  margin-bottom: 8px;
}

.toc-list {
  list-style: none;
  padding: 0;
}

.toc-item a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 13px;
  color: var(--text-secondary);
  text-decoration: none;
  padding: 7px 20px 7px 20px;
  transition: color 0.2s;
  position: relative;
  border-left: 2px solid transparent;
  line-height: 1.35;
}

.toc-item a:hover {
  color: var(--text-primary);
}

.toc-item.active a {
  color: var(--text-primary);
  border-left-color: var(--accent-1);
  background: rgba(139,92,246,0.06);
}

.toc-dot {
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--accent-1);
  flex-shrink: 0;
  opacity: 0;
  transition: opacity 0.24s;
}

.toc-item.active .toc-dot {
  opacity: 1;
}

.toc-item.active a {
  border-image: linear-gradient(to bottom, #8B5CF6, #6366F1, #38BDF8) 1;
}

.toc-back {
  display: block;
  padding: 12px 20px 4px;
  font-size: 12px;
  font-family: var(--font-ui);
  font-weight: 500;
  background: var(--grad);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  text-decoration: none;
  border-top: 1px solid var(--border);
  margin-top: 8px;
  transition: opacity 0.2s;
}

.toc-back:hover {
  opacity: 0.7;
}

/* DOCUMENT */
.document {
  flex: 1;
  padding-left: 64px;
  min-width: 0;
}

.doc-section {
  margin-top: 72px;
  scroll-margin-top: 88px;
}

.doc-section:first-child {
  margin-top: 0;
}

.section-heading {
  display: flex;
  align-items: baseline;
  gap: 14px;
  margin-bottom: 20px;
}

.section-num {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 500;
  color: var(--text-secondary);
  flex-shrink: 0;
  background: var(--grad);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section-heading h2 {
  font-family: var(--font-ui);
  font-size: 28px;
  font-weight: 400;
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--text-primary);
}

.section-heading h2 em {
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 400;
}

.doc-section p {
  font-size: 16px;
  color: var(--text-body);
  line-height: 1.75;
  max-width: 640px;
  margin-top: 16px;
}

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

.inline-code {
  font-family: var(--font-mono);
  font-size: 13px;
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--border-8);
  border-radius: 4px;
  padding: 2px 6px;
  color: var(--text-primary);
  letter-spacing: 0;
}

.callout {
  margin: 24px 12px 8px 0;
  padding: 16px 20px;
  background: rgba(139,92,246,0.06);
  border-radius: 8px;
  border: 1px solid rgba(139,92,246,0.2);
  border-left: 2px solid;
  border-image: linear-gradient(to bottom, #8B5CF6, #6366F1, #38BDF8) 1;
  box-shadow: 0 -2px 20px rgba(99,68,160,0.12) inset;
  max-width: 640px;
  position: relative;
}

.callout-label {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent-1);
  margin-bottom: 8px;
  display: block;
}

.callout p {
  font-size: 13px !important;
  color: var(--text-primary) !important;
  line-height: 1.6 !important;
  margin-top: 0 !important;
  max-width: none !important;
}

/* SECTION DIVIDER */
.section-rule {
  width: 100%;
  max-width: 640px;
  height: 1px;
  background: var(--border);
  margin-top: 72px;
  display: block;
}

/* FOOTER */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 64px 80px;
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: relative;
  z-index: 2;
  background: transparent;
  box-shadow: none;
}

footer.zirel-public-footer.legal-public-footer {
  background: rgba(5,5,7,0.82);
  border-top: 1px solid rgba(255,255,255,0.07);
  display: block;
  margin: 40px 0 0;
  max-width: none;
  padding: 44px 20px 0;
  width: 100%;
}

.legal-main-brand .zirel-public-brand-mark {
  flex-shrink: 0;
}

.footer-logo {
  font-size: 12px;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 7px;
  text-decoration: none;
}

.footer-links {
  display: flex;
  gap: 28px;
}

.footer-links a {
  font-size: 13px;
  color: var(--text-secondary);
  text-decoration: none;
  transition: color 0.2s;
}

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

.footer-copy {
  font-size: 12px;
  color: var(--text-muted);
  font-family: var(--font-ui);
}

/* BACK TO TOP FLOAT */
.back-to-top {
  position: fixed;
  bottom: 40px;
  right: 40px;
  z-index: 90;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}

.back-to-top.visible {
  opacity: 1;
  pointer-events: auto;
}

.back-to-top-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px 8px 12px;
  background: var(--glass-bg);
  backdrop-filter: blur(16px) saturate(140%);
  -webkit-backdrop-filter: blur(16px) saturate(140%);
  border: 1px solid var(--glass-border);
  border-radius: 999px;
  cursor: pointer;
  font-size: 12px;
  font-family: var(--font-ui);
  font-weight: 500;
  background-image: var(--grad);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  background-color: var(--glass-bg);
  background-size: auto;
  text-decoration: none;
  transition: border-color 0.2s;
}

.back-to-top-btn:hover {
  border-color: rgba(139,92,246,0.3);
}

/* GLYPH */
.logo-glyph svg {
  display: block;
}

/* PRINT */
@media print {
  .top-nav, .mini-toc, .mobile-anchor-bar, .back-to-top, .site-footer .footer-links, .print-btn {
    display: none !important;
  }
  body {
    background: #fff;
    color: #111;
  }
  body::before, .dot-grid, .grain {
    display: none;
  }
  .body-wrapper {
    max-width: 100%;
    padding: 0 40px;
    display: block;
  }
  .document {
    padding-left: 0;
  }
  .page-header {
    padding-top: 40px;
  }
  .doc-section p, .section-heading h2, .section-num, .callout p {
    color: #222 !important;
    -webkit-text-fill-color: #222 !important;
  }
  .callout {
    border: 1px solid #ccc;
    background: #f9f9f9;
    box-shadow: none;
  }
  .doc-section {
    page-break-inside: avoid;
  }
  .site-footer {
    display: flex;
    border-top: 1px solid #ddd;
  }
  .meta-pill {
    border: 1px solid #ccc;
    background: #f5f5f5;
  }
  .inline-code {
    background: #f0f0f0;
    border: 1px solid #ddd;
    color: #333;
  }
}

/* RESPONSIVE */
@media (max-width: 1024px) {
  .mini-toc {
    display: none;
  }
  .mobile-anchor-bar {
    display: flex;
  }
  .body-wrapper {
    padding: 0 24px 80px;
  }
  .document {
    padding-left: 0;
  }
  .site-footer {
    padding: 40px 24px;
    flex-direction: column;
    gap: 24px;
    text-align: center;
  }
  .footer-links {
    justify-content: center;
  }
  .page-title {
    font-size: 40px;
  }
  .back-to-top {
    bottom: 24px;
    right: 24px;
  }
}

@media (max-width: 640px) {
  .top-nav {
    padding: 0 20px;
  }
  .nav-breadcrumb {
    display: none;
  }
  .page-header {
    padding: 140px 20px 48px;
  }
  .page-title {
    font-size: 32px;
  }
  .body-wrapper {
    padding: 0 16px 60px;
  }
  .meta-row {
    gap: 6px;
  }
}