:root {
  --bg-canvas: #1e1612;
  --bg-surface: #33271e;
  --bg-surface-hover: #463527;
  --text-primary: #f5ecdf;
  --text-muted: #d1c2ae;
  --accent-primary: #f59e0b;
  --accent-secondary: #fbbf24;
  --border-subtle: #80664c;
  --shadow-block: 4px 4px 0 #f5ecdf;
  --shadow-pressed: 1px 1px 0 #f5ecdf;
  --font-body: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-mono: ui-monospace, Consolas, "Liberation Mono", Menlo, Courier, monospace;
}

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

html {
  font-size: 16px;
  background-color: var(--bg-canvas);
  color: var(--text-primary);
  font-family: var(--font-body);
  line-height: 1.6;
  scroll-behavior: smooth;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  background-color: var(--bg-canvas);
  color: var(--text-primary);
}

.skip-link {
  position: absolute;
  top: -100px;
  left: 1rem;
  background: var(--accent-primary);
  color: #1e1612;
  font-weight: 700;
  padding: 0.75rem 1.25rem;
  z-index: 9999;
  border: 1px solid var(--text-primary);
  text-decoration: none;
}
.skip-link:focus {
  top: 1rem;
}

/* Site Header */
.site-header {
  position: relative;
  background-color: var(--bg-surface);
  border-bottom: 1px solid var(--border-subtle);
  padding: 0.85rem 1.5rem;
  z-index: 100;
}

.header-container {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.header-brand-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}

.brand-link {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  text-decoration: none;
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1.1rem;
  letter-spacing: -0.02em;
}

.brand-badge {
  background: var(--accent-primary);
  color: #1e1612;
  font-size: 0.75rem;
  font-weight: 800;
  padding: 0.15rem 0.45rem;
  border: 1px solid #1e1612;
}

.menu-toggle {
  display: none;
  background: transparent;
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
  padding: 0.4rem 0.65rem;
  font-size: 1.25rem;
  cursor: pointer;
  line-height: 1;
}

.menu-toggle:focus-visible {
  outline: 2px solid var(--accent-primary);
}

.site-nav {
  display: flex;
  justify-content: center;
  width: 100%;
  border-top: 1px dashed var(--border-subtle);
  padding-top: 0.65rem;
}

.nav-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  list-style: none;
  gap: 1.25rem;
}

.nav-link {
  color: var(--text-muted);
  text-decoration: none;
  font-family: var(--font-mono);
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0.25rem 0.5rem;
  border: 1px solid transparent;
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

.nav-link:hover,
.nav-link:focus-visible,
.nav-link.active {
  color: #1e1612;
  background-color: var(--accent-primary);
  border-color: var(--accent-primary);
}

/* Base Layout */
main {
  flex: 1 0 auto;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: clamp(1.5rem, 4vw, 3.5rem) 1.5rem;
  min-width: 0;
}

.reading-container {
  max-width: 72ch;
  margin: 0 auto;
  padding: clamp(1.5rem, 4vw, 3rem) 1.5rem;
  min-width: 0;
}

/* Typography */
h1, h2, h3, h4 {
  color: var(--text-primary);
  line-height: 1.2;
  font-weight: 700;
  overflow-wrap: anywhere;
  hyphens: auto;
}

h1 {
  font-size: clamp(2.2rem, 5.5vw, 4rem);
  letter-spacing: -0.03em;
  margin-bottom: 1.25rem;
}

h2 {
  font-size: clamp(1.5rem, 3.2vw, 2.3rem);
  letter-spacing: -0.02em;
  margin-bottom: 1rem;
}

h3 {
  font-size: clamp(1.15rem, 2.2vw, 1.45rem);
  margin-bottom: 0.5rem;
}

p {
  color: var(--text-muted);
  margin-bottom: 1.25rem;
  font-size: 1.05rem;
  overflow-wrap: anywhere;
}

p strong {
  color: var(--text-primary);
}

.mono-tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent-primary);
  background-color: rgba(245, 158, 11, 0.12);
  border: 1px solid var(--accent-primary);
  padding: 0.2rem 0.55rem;
  margin-bottom: 0.85rem;
}

/* Hero Section */
.hero-fieldbook {
  background: radial-gradient(circle at 80% 20%, rgba(245, 158, 11, 0.18) 0%, rgba(30, 22, 18, 0) 65%),
              linear-gradient(180deg, #33271e 0%, #1e1612 100%);
  border-bottom: 1px solid var(--border-subtle);
  padding: clamp(3rem, 7vw, 6rem) 1.5rem;
}

.hero-content {
  max-width: 1000px;
  margin: 0 auto;
}

.hero-lead {
  font-size: clamp(1.15rem, 2.5vw, 1.45rem);
  color: var(--text-primary);
  line-height: 1.5;
  max-width: 70ch;
  margin-bottom: 2rem;
}

.action-row {
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem;
  align-items: center;
}

/* Buttons */
.btn-amber {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  background-color: var(--accent-primary);
  color: #1e1612;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.95rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding: 0.9rem 1.75rem;
  text-decoration: none;
  border: 1px solid #1e1612;
  box-shadow: var(--shadow-block);
  cursor: pointer;
  transition: transform 0.12s ease, box-shadow 0.12s ease;
  min-height: 48px;
}

.btn-amber:hover,
.btn-amber:focus-visible {
  transform: translate(3px, 3px);
  box-shadow: 1px 1px 0 #f5ecdf;
  background-color: var(--accent-secondary);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background-color: transparent;
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-size: 0.95rem;
  padding: 0.85rem 1.5rem;
  text-decoration: none;
  border: 1px solid var(--border-subtle);
  min-height: 48px;
  transition: all 0.2s ease;
}

.btn-secondary:hover,
.btn-secondary:focus-visible {
  border-color: var(--accent-primary);
  color: var(--accent-primary);
  background-color: var(--bg-surface);
}

/* Bento Grid */
.bento-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 1.5rem;
  margin-top: 2rem;
}

.bento-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: border-color 0.2s ease, background-color 0.2s ease;
}

.bento-card:hover {
  background-color: var(--bg-surface-hover);
  border-color: var(--accent-primary);
}

.col-4 { grid-column: span 4; }
.col-6 { grid-column: span 6; }
.col-8 { grid-column: span 8; }
.col-12 { grid-column: span 12; }

.bento-media {
  width: 100%;
  aspect-ratio: 16 / 10;
  margin-bottom: 1.25rem;
  border: 1px solid var(--border-subtle);
  overflow: hidden;
  background-color: #160f0c;
}

.bento-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.card-number {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--accent-primary);
  margin-bottom: 0.5rem;
}

/* Radial Gradient Background Sections */
.radial-amber-section {
  background: radial-gradient(circle at 20% 50%, rgba(245, 158, 11, 0.12) 0%, transparent 60%),
              var(--bg-canvas);
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
}

.radial-amber-alt {
  background: radial-gradient(circle at 80% 50%, rgba(245, 158, 11, 0.12) 0%, transparent 60%),
              var(--bg-canvas);
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
}

/* Adaptability Matrix Table */
.matrix-container {
  overflow-x: auto;
  border: 1px solid var(--border-subtle);
  margin: 1.5rem 0;
  background-color: var(--bg-surface);
}

.matrix-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.95rem;
}

.matrix-table th {
  background-color: #261c15;
  color: var(--accent-primary);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  text-transform: uppercase;
  padding: 1rem;
  border-bottom: 1px solid var(--border-subtle);
  border-right: 1px solid var(--border-subtle);
}

.matrix-table td {
  padding: 1rem;
  border-bottom: 1px solid var(--border-subtle);
  border-right: 1px solid var(--border-subtle);
  color: var(--text-muted);
}

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

.matrix-table tr:hover td {
  background-color: rgba(245, 158, 11, 0.05);
  color: var(--text-primary);
}

/* Rules vs Variations Panels */
.rules-split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  margin: 1.5rem 0;
}

.rule-box {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  padding: 1.5rem;
}

.rule-box-header {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  text-transform: uppercase;
  color: var(--accent-primary);
  padding-bottom: 0.5rem;
  border-bottom: 1px dashed var(--border-subtle);
  margin-bottom: 1rem;
}

.fieldbook-list {
  list-style: none;
}

.fieldbook-list li {
  position: relative;
  padding-left: 1.5rem;
  margin-bottom: 0.75rem;
  color: var(--text-muted);
}

.fieldbook-list li::before {
  content: "—";
  position: absolute;
  left: 0;
  color: var(--accent-primary);
  font-family: var(--font-mono);
}

/* Numbered Checklist */
.numbered-checklist {
  list-style: none;
  counter-reset: checklist-counter;
  margin: 1.5rem 0;
  display: grid;
  gap: 1rem;
}

.numbered-checklist li {
  counter-increment: checklist-counter;
  display: flex;
  gap: 1.25rem;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  padding: 1.25rem;
}

.numbered-checklist li::before {
  content: counter(checklist-counter, decimal-leading-zero);
  font-family: var(--font-mono);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--accent-primary);
  line-height: 1;
}

/* Interactive Message Tool */
.tool-box {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  padding: 2rem;
  margin: 2rem 0;
}

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

.form-label {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  text-transform: uppercase;
  color: var(--accent-primary);
  margin-bottom: 0.5rem;
}

.form-input, .form-textarea, .form-select {
  width: 100%;
  background-color: #1a120e;
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
  padding: 0.85rem 1rem;
  font-family: var(--font-body);
  font-size: 1rem;
}

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

.form-textarea {
  min-height: 140px;
  resize: vertical;
}

.tool-output {
  margin-top: 1.5rem;
  background-color: #150e0a;
  border: 1px dashed var(--border-subtle);
  padding: 1.25rem;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  white-space: pre-wrap;
  color: var(--text-muted);
}

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

/* FAQ Accordion / Cards */
.faq-grid {
  display: grid;
  gap: 1.25rem;
  margin-top: 1.5rem;
}

.faq-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  padding: 1.5rem;
}

.faq-card h3 {
  font-size: 1.15rem;
  margin-bottom: 0.75rem;
  color: var(--text-primary);
}

/* Site Footer */
.site-footer {
  background-color: #150e0b;
  border-top: 2px solid var(--border-subtle);
  padding: 3.5rem 1.5rem 2rem;
  color: var(--text-muted);
  font-size: 0.9rem;
}

.footer-container {
  max-width: 1200px;
  margin: 0 auto;
}

.footer-top {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 2.5rem;
  margin-bottom: 2.5rem;
  padding-bottom: 2.5rem;
  border-bottom: 1px solid var(--border-subtle);
}

.footer-brand {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  color: var(--text-primary);
  margin-bottom: 0.75rem;
}

.footer-col h4 {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  text-transform: uppercase;
  color: var(--accent-primary);
  margin-bottom: 1rem;
}

.footer-links {
  list-style: none;
  display: grid;
  gap: 0.5rem;
}

.footer-links a {
  color: var(--text-muted);
  text-decoration: none;
  transition: color 0.2s ease;
}

.footer-links a:hover,
.footer-links a:focus-visible {
  color: var(--accent-primary);
  text-decoration: underline;
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  font-size: 0.85rem;
  color: #9c8973;
}

.footer-legal-entity {
  line-height: 1.5;
  margin-bottom: 0.5rem;
}

/* Scroll Fade Animations */
.fade-in-up {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.4s cubic-bezier(0.16, 1, 0.3, 1), transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.fade-in-up.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* Responsive Media Queries */
@media (max-width: 1024px) {
  .col-4 { grid-column: span 6; }
  .col-8 { grid-column: span 12; }
}

@media (max-width: 768px) {
  .menu-toggle {
    display: block;
  }

  .site-nav {
    display: none;
    border-top: none;
    padding-top: 0;
  }

  .site-nav.is-open {
    display: block;
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border-subtle);
  }

  .nav-list {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.5rem;
  }

  .nav-link {
    display: block;
    width: 100%;
    padding: 0.6rem 0.75rem;
  }

  .bento-grid {
    grid-template-columns: 1fr;
    gap: 1.25rem;
  }

  .col-4, .col-6, .col-8, .col-12 {
    grid-column: span 1;
  }

  .rules-split {
    grid-template-columns: 1fr;
  }

  .footer-top {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
}

@media (max-width: 480px) {
  .action-row {
    flex-direction: column;
    align-items: stretch;
  }

  .btn-amber, .btn-secondary {
    width: 100%;
  }

  .matrix-table th, .matrix-table td {
    padding: 0.65rem;
    font-size: 0.85rem;
  }
}

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