:root {
  --bg-canvas: #ffffff;
  --bg-surface: #f1f5f9;
  --bg-surface-alt: #e2e8f0;
  --text-primary: #1e293b;
  --text-muted: #64748b;
  --text-light: #f8fafc;
  --accent-rust: #a33d25;
  --accent-rust-dark: #872e18;
  --accent-rust-light: #fdf2ef;
  --border-subtle: #cbd5e1;
  --border-fine: #e2e8f0;
  --font-main: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", sans-serif;
  --radius-panel: 20px;
  --radius-btn: 4px;
  --shadow-hard: 4px 4px 0px #1e293b;
  --shadow-hard-rust: 4px 4px 0px #a33d25;
  --shadow-hover: 0px 0px 0px #1e293b;
  --ease-kinetic: cubic-bezier(0.16, 1, 0.3, 1);
  --max-content: 1180px;
  --measure-prose: 68ch;
}

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

html {
  font-family: var(--font-main);
  background-color: var(--bg-canvas);
  color: var(--text-primary);
  line-height: 1.68;
  scroll-behavior: smooth;
  overflow-x: hidden;
}

body {
  margin: 0;
  padding: 0;
  overflow-wrap: anywhere;
  hyphens: auto;
  font-size: 1.05rem;
  background-color: var(--bg-canvas);
}

/* Typography */
h1, h2, h3, h4 {
  color: var(--text-primary);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.2;
}

h1 {
  font-size: clamp(2.4rem, 5vw, 4rem);
  margin-bottom: 1.25rem;
}

h2 {
  font-size: clamp(1.8rem, 3.5vw, 2.75rem);
  margin-bottom: 1rem;
}

h3 {
  font-size: clamp(1.3rem, 2.2vw, 1.75rem);
  margin-bottom: 0.75rem;
}

p {
  margin-bottom: 1.25rem;
  color: var(--text-primary);
}

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

.section-num {
  display: inline-block;
  font-size: 0.85rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent-rust);
  margin-bottom: 0.5rem;
}

/* Header & In-flow navigation */
header.site-header {
  position: relative;
  width: 100%;
  background: transparent;
  transition: background-color 0.3s ease, border-color 0.3s ease;
  border-bottom: 1px solid transparent;
  z-index: 50;
}

header.site-header.scrolled {
  background: #ffffff;
  border-bottom-color: var(--border-fine);
}

.header-container {
  max-width: var(--max-content);
  margin: 0 auto;
  padding: 1.5rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: var(--text-primary);
}

.brand-symbol {
  width: 32px;
  height: 32px;
  background-color: var(--accent-rust);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 800;
  font-size: 1.1rem;
  border-radius: 4px;
}

.brand-text {
  font-weight: 800;
  font-size: 1.2rem;
  letter-spacing: -0.03em;
  color: var(--text-primary);
}

nav.main-nav {
  display: flex;
  align-items: center;
  gap: 1.75rem;
}

nav.main-nav a {
  text-decoration: none;
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--text-primary);
  position: relative;
  transition: color 0.2s ease;
  padding: 0.25rem 0;
}

nav.main-nav a:hover,
nav.main-nav a[aria-current="page"] {
  color: var(--accent-rust);
}

nav.main-nav a[aria-current="page"]::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background-color: var(--accent-rust);
}

.menu-toggle {
  display: none;
  background: none;
  border: 1px solid var(--border-subtle);
  border-radius: 4px;
  font-size: 1.4rem;
  line-height: 1;
  padding: 0.4rem 0.75rem;
  cursor: pointer;
  color: var(--text-primary);
}

/* Mobile dropdown */
.mobile-nav-panel {
  display: none;
  background-color: #ffffff;
  border-bottom: 2px solid var(--border-fine);
  padding: 1rem 1.5rem 1.5rem;
}

.mobile-nav-panel.open {
  display: block;
}

.mobile-nav-panel a {
  display: block;
  padding: 0.75rem 0;
  text-decoration: none;
  font-weight: 700;
  color: var(--text-primary);
  border-bottom: 1px solid var(--bg-surface);
}

.mobile-nav-panel a:last-child {
  border-bottom: none;
}

/* Layout Wrappers */
.container {
  max-width: var(--max-content);
  margin: 0 auto;
  padding: 3.5rem 1.5rem;
}

.editorial-measure {
  max-width: var(--measure-prose);
  margin: 0 auto;
}

/* Alternating bands */
.band-white {
  background-color: var(--bg-canvas);
}

.band-grey {
  background-color: var(--bg-surface);
  border-top: 1px solid var(--border-fine);
  border-bottom: 1px solid var(--border-fine);
}

.band-rust {
  background-color: var(--accent-rust);
  color: #ffffff;
  padding: 4.5rem 0;
}

.band-rust h2,
.band-rust h3,
.band-rust p,
.band-rust .section-num {
  color: #ffffff;
}

/* Walkthrough Vertical Spine Layout */
.walkthrough-stream {
  position: relative;
  padding-left: 2.5rem;
  border-left: 2px solid var(--accent-rust);
  margin-left: 0.5rem;
}

.walkthrough-node {
  position: relative;
  margin-bottom: 4rem;
}

.walkthrough-node:last-child {
  margin-bottom: 0;
}

.walkthrough-node::before {
  content: "";
  position: absolute;
  left: -2.95rem;
  top: 0.25rem;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background-color: #ffffff;
  border: 3px solid var(--accent-rust);
}

/* Buttons */
.btn-rust {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  background-color: var(--accent-rust);
  color: #ffffff !important;
  text-decoration: none;
  font-weight: 700;
  font-size: 1rem;
  padding: 0.85rem 1.75rem;
  border-radius: var(--radius-btn);
  border: 2px solid #1e293b;
  box-shadow: var(--shadow-hard);
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.15s ease, background-color 0.15s ease;
}

.btn-rust:hover {
  transform: translate(2px, 2px);
  box-shadow: 2px 2px 0px #1e293b;
  background-color: var(--accent-rust-dark);
}

.btn-rust:active {
  transform: translate(4px, 4px);
  box-shadow: none;
}

.btn-outline {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background-color: #ffffff;
  color: var(--text-primary) !important;
  text-decoration: none;
  font-weight: 700;
  font-size: 1rem;
  padding: 0.85rem 1.75rem;
  border-radius: var(--radius-btn);
  border: 2px solid var(--text-primary);
  box-shadow: var(--shadow-hard);
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.btn-outline:hover {
  transform: translate(2px, 2px);
  box-shadow: 2px 2px 0px var(--text-primary);
}

/* Hero Section */
.hero-stage {
  padding: 2.5rem 0 4rem;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 3rem;
  align-items: center;
}

.hero-visual-card {
  position: relative;
  background-color: var(--bg-surface);
  border-radius: var(--radius-panel);
  border: 1px solid var(--border-subtle);
  padding: 2rem;
  overflow: hidden;
}

/* Floating Facts Panel */
.facts-panel {
  background: #ffffff;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-panel);
  padding: 1.75rem;
  box-shadow: 0 10px 25px -5px rgba(30, 41, 59, 0.08);
  margin-top: -2.5rem;
  position: relative;
  z-index: 10;
}

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

.fact-item {
  border-left: 3px solid var(--accent-rust);
  padding-left: 1rem;
}

.fact-item .num {
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--accent-rust);
  line-height: 1;
  display: block;
  margin-bottom: 0.35rem;
}

.fact-item .label {
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-primary);
  margin-bottom: 0.25rem;
}

.fact-item .desc {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.4;
  margin-bottom: 0;
}

/* Icon-Led Rows Separated by Thin Rules */
.rule-rows {
  margin: 2.5rem 0;
  border-top: 1px solid var(--border-fine);
}

.rule-row {
  display: grid;
  grid-template-columns: 48px 1fr 2fr;
  gap: 2rem;
  align-items: start;
  padding: 2rem 0;
  border-bottom: 1px solid var(--border-fine);
  transition: background-color 0.2s ease;
}

.rule-row:hover {
  background-color: rgba(241, 245, 249, 0.4);
}

.rule-row-icon {
  width: 44px;
  height: 44px;
  background-color: var(--accent-rust-light);
  color: var(--accent-rust);
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  border: 1px solid rgba(163, 61, 37, 0.2);
  font-weight: 800;
}

.rule-row-title h3 {
  margin-bottom: 0.25rem;
}

.rule-row-title span {
  font-size: 0.85rem;
  color: var(--accent-rust);
  font-weight: 700;
}

/* Pull Quotes */
.pull-quote {
  padding: 3rem 2rem;
  text-align: center;
  border-top: 2px solid var(--accent-rust);
  border-bottom: 2px solid var(--accent-rust);
  margin: 3.5rem 0;
  background-color: #fffaf9;
}

.pull-quote blockquote {
  font-size: clamp(1.4rem, 2.5vw, 2rem);
  font-weight: 800;
  line-height: 1.35;
  color: var(--text-primary);
  max-width: 900px;
  margin: 0 auto 1rem;
}

.pull-quote cite {
  font-size: 0.95rem;
  font-style: normal;
  font-weight: 700;
  color: var(--accent-rust);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

/* Flat SVG Illustrations */
.svg-illustration {
  width: 100%;
  height: auto;
  border-radius: var(--radius-panel);
  display: block;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
}

/* Image Figures */
figure.editorial-fig {
  margin: 2.5rem 0;
}

figure.editorial-fig img {
  width: 100%;
  height: auto;
  max-height: 520px;
  object-fit: cover;
  border-radius: var(--radius-panel);
  border: 1px solid var(--border-subtle);
  display: block;
}

figcaption {
  margin-top: 0.75rem;
  font-size: 0.85rem;
  color: var(--text-muted);
  text-align: left;
  border-left: 2px solid var(--accent-rust);
  padding-left: 0.75rem;
}

/* Plan Annotations Deck */
.annotation-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.75rem;
  margin-top: 2.5rem;
}

.annotation-card {
  background: #ffffff;
  border: 1px solid var(--border-fine);
  border-radius: var(--radius-panel);
  padding: 1.75rem;
  position: relative;
  box-shadow: 0 4px 12px rgba(0,0,0,0.03);
}

.annotation-badge {
  display: inline-block;
  background-color: var(--text-primary);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 800;
  padding: 0.2rem 0.6rem;
  border-radius: 4px;
  margin-bottom: 1rem;
}

/* FAQ Accordion List */
.faq-list {
  margin-top: 2rem;
  border-top: 1px solid var(--border-fine);
}

.faq-item {
  border-bottom: 1px solid var(--border-fine);
}

.faq-button {
  width: 100%;
  text-align: left;
  padding: 1.5rem 0;
  background: none;
  border: none;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: inherit;
  font-size: 1.2rem;
  font-weight: 800;
  color: var(--text-primary);
}

.faq-button:hover {
  color: var(--accent-rust);
}

.faq-icon {
  font-size: 1.5rem;
  font-weight: 400;
  line-height: 1;
  transition: transform 0.2s ease;
  color: var(--accent-rust);
}

.faq-content {
  display: none;
  padding-bottom: 1.75rem;
  font-size: 1rem;
  color: var(--text-primary);
}

.faq-item.active .faq-content {
  display: block;
}

.faq-item.active .faq-icon {
  transform: rotate(45deg);
}

/* Tables */
.table-wrapper {
  overflow-x: auto;
  margin: 2.5rem 0;
  border: 1px solid var(--border-fine);
  border-radius: 12px;
}

table.data-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  background: #ffffff;
}

table.data-table th,
table.data-table td {
  padding: 1.1rem 1.25rem;
  border-bottom: 1px solid var(--border-fine);
}

table.data-table th {
  background-color: var(--bg-surface);
  font-weight: 800;
  font-size: 0.9rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--text-primary);
}

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

/* Interactive Contact Tool */
.tool-box {
  background: #ffffff;
  border: 2px solid #1e293b;
  border-radius: var(--radius-panel);
  padding: 2.5rem;
  box-shadow: var(--shadow-hard);
  max-width: 720px;
  margin: 2rem auto;
}

.form-group {
  margin-bottom: 1.5rem;
}

.form-group label {
  display: block;
  font-weight: 800;
  font-size: 0.95rem;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 0.85rem 1rem;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-btn);
  font-family: inherit;
  font-size: 1rem;
  background: #ffffff;
  color: var(--text-primary);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: 2px solid var(--accent-rust);
  border-color: var(--accent-rust);
}

.tool-output {
  margin-top: 2rem;
  padding: 1.5rem;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: 8px;
  font-family: monospace;
  font-size: 0.95rem;
  white-space: pre-wrap;
  display: none;
}

.tool-actions {
  display: flex;
  gap: 1rem;
  margin-top: 1.5rem;
  flex-wrap: wrap;
}

/* Scroll reveal helper */
.reveal-entry {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s var(--ease-kinetic), transform 0.6s var(--ease-kinetic);
}

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

/* Footer */
footer.site-footer {
  background-color: #1e293b;
  color: #94a3b8;
  padding: 4.5rem 0 3rem;
  border-top: 4px solid var(--accent-rust);
}

footer.site-footer a {
  color: #cbd5e1;
  text-decoration: none;
  transition: color 0.2s ease;
}

footer.site-footer a:hover {
  color: #ffffff;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: 3rem;
  margin-bottom: 3.5rem;
}

.footer-col h4 {
  color: #ffffff;
  font-size: 1rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 1.25rem;
}

.footer-nav-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.footer-bottom {
  border-top: 1px solid #334155;
  padding-top: 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1.5rem;
  font-size: 0.9rem;
}

/* Responsive Breakpoints */
@media (max-width: 900px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  .facts-grid {
    grid-template-columns: 1fr;
    gap: 1.25rem;
  }
  .facts-panel {
    margin-top: 1.5rem;
  }
  .rule-row {
    grid-template-columns: 44px 1fr;
    gap: 1rem;
  }
  .rule-row-body {
    grid-column: 1 / -1;
    padding-left: 0;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
}

@media (max-width: 768px) {
  nav.main-nav {
    display: none;
  }
  .menu-toggle {
    display: block;
  }
  .walkthrough-stream {
    padding-left: 1.75rem;
    margin-left: 0.25rem;
  }
  .walkthrough-node::before {
    left: -2.2rem;
  }
}

@media (prefers-reduced-motion: reduce){*,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important;scroll-behavior:auto!important}}