:root {
  --bg-canvas: #f7f5f0;
  --bg-surface: #ebe7de;
  --bg-surface-hover: #e2ddd2;
  --text-primary: #111111;
  --text-muted: #55524c;
  --accent-primary: #d62828;
  --accent-secondary: #9e1b1b;
  --border-subtle: #d3cdbf;
  --font-serif: Charter, "Bitstream Charter", "Sitka Text", Cambria, serif;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --ease-kinetic: cubic-bezier(0.16, 1, 0.3, 1);
  --shadow-elevation: 0 8px 24px -4px rgba(17, 17, 17, 0.08);
}

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

body {
  background-color: var(--bg-canvas);
  color: var(--text-primary);
  font-family: var(--font-serif);
  font-size: 1.05rem;
  line-height: 1.65;
  overflow-wrap: anywhere;
  hyphens: auto;
  -webkit-font-smoothing: antialiased;
}

/* Header & Navigation */
header.site-header {
  position: relative;
  width: 100%;
  background: var(--bg-canvas);
  border-bottom: 1px solid var(--border-subtle);
  z-index: 100;
  transition: background-color 0.3s ease;
}

.header-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1.1rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand-wrapper {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  text-decoration: none;
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: -0.02em;
}

.brand-wrapper:hover {
  color: var(--accent-primary);
}

.brand-mark {
  display: inline-block;
  width: 14px;
  height: 14px;
  background-color: var(--accent-primary);
  border-radius: 2px;
}

nav.main-nav ul {
  display: flex;
  list-style: none;
  gap: 1.5rem;
  align-items: center;
}

nav.main-nav a {
  text-decoration: none;
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 0.88rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 0.35rem 0.2rem;
  border-bottom: 2px solid transparent;
  transition: all 0.2s ease;
}

nav.main-nav a:hover,
nav.main-nav a.active {
  color: var(--accent-primary);
  border-bottom-color: var(--accent-primary);
}

.mobile-nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--border-subtle);
  border-radius: 4px;
  font-size: 1.4rem;
  line-height: 1;
  padding: 0.3rem 0.6rem;
  cursor: pointer;
  color: var(--text-primary);
}

/* Layout Core */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.reading-wrap {
  max-width: 72ch;
  margin: 0 auto;
}

/* Typography elements */
h1, h2, h3, h4 {
  color: var(--text-primary);
  font-weight: 700;
  line-height: 1.25;
}

h1 {
  font-size: clamp(2rem, 4vw, 2.85rem);
  letter-spacing: -0.03em;
  margin-bottom: 1.25rem;
}

h2 {
  font-size: clamp(1.4rem, 2.5vw, 1.9rem);
  letter-spacing: -0.02em;
  margin-bottom: 0.85rem;
}

h3 {
  font-size: 1.25rem;
  margin-bottom: 0.5rem;
}

p {
  margin-bottom: 1.25rem;
}

.meta-label {
  font-family: var(--font-sans);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--accent-primary);
  font-weight: 700;
  display: block;
  margin-bottom: 0.5rem;
}

/* Hero Section */
.hero-block {
  padding: 4rem 0 3rem;
  background: var(--bg-canvas);
  border-bottom: 1px solid var(--border-subtle);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 3rem;
  align-items: center;
}

.hero-visual {
  position: relative;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: 4px;
  padding: 1.5rem;
  box-shadow: var(--shadow-elevation);
}

.hero-visual img {
  width: 100%;
  height: auto;
  aspect-ratio: 16/9;
  object-fit: cover;
  border-radius: 4px;
  display: block;
  border: 1px solid var(--border-subtle);
}

.rule-card {
  margin-top: 1.25rem;
  background: var(--bg-canvas);
  border-left: 3px solid var(--accent-primary);
  padding: 1rem 1.25rem;
  border-radius: 0 4px 4px 0;
}

.rule-card h4 {
  font-family: var(--font-sans);
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent-primary);
  margin-bottom: 0.35rem;
}

.rule-card ol {
  padding-left: 1.2rem;
  font-size: 0.92rem;
  color: var(--text-muted);
}

.rule-card li {
  margin-bottom: 0.25rem;
}

/* Signal Button */
.btn-signal {
  display: inline-block;
  background-color: var(--accent-primary);
  color: #ffffff;
  padding: 0.75rem 1.75rem;
  border-radius: 999px;
  font-family: var(--font-sans);
  font-size: 0.9rem;
  font-weight: 600;
  text-decoration: none;
  border: 1px solid var(--accent-primary);
  cursor: pointer;
  transition: all 0.2s var(--ease-kinetic);
}

.btn-signal:hover {
  background-color: var(--accent-secondary);
  border-color: var(--accent-secondary);
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(214, 40, 40, 0.25);
}

.btn-secondary {
  display: inline-block;
  background: transparent;
  color: var(--text-primary);
  padding: 0.75rem 1.5rem;
  border-radius: 999px;
  font-family: var(--font-sans);
  font-size: 0.9rem;
  font-weight: 600;
  text-decoration: none;
  border: 1px solid var(--border-subtle);
  transition: all 0.2s ease;
}

.btn-secondary:hover {
  background: var(--bg-surface-hover);
  border-color: var(--text-muted);
}

/* Stat Strip */
.stat-strip {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.5rem;
  background: var(--bg-surface);
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
  padding: 2rem 1.5rem;
  margin: 2.5rem 0;
}

.stat-item {
  border-left: 2px solid var(--accent-primary);
  padding-left: 1rem;
}

.stat-value {
  font-family: var(--font-sans);
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.1;
}

.stat-label {
  font-family: var(--font-sans);
  font-size: 0.78rem;
  text-transform: uppercase;
  color: var(--text-muted);
  letter-spacing: 0.05em;
  margin-top: 0.35rem;
}

/* Tonal Sectioning with Diagonal Cut */
.tonal-section {
  background: var(--bg-surface);
  padding: 4.5rem 0;
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
  clip-path: polygon(0 0, 100% 2vw, 100% 100%, 0 calc(100% - 2vw));
  margin: 3rem 0;
}

.tonal-flat {
  padding: 3.5rem 0;
}

/* Divider Item Rows (No boxed cards) */
.list-register {
  margin: 2rem 0;
  border-top: 1px solid var(--border-subtle);
}

.register-row {
  display: grid;
  grid-template-columns: 80px 1.5fr 2fr 120px;
  align-items: center;
  padding: 1.35rem 0;
  border-bottom: 1px solid var(--border-subtle);
  gap: 1.5rem;
  transition: background-color 0.2s ease;
}

.register-row:hover {
  background-color: rgba(235, 231, 222, 0.4);
}

.row-icon {
  width: 48px;
  height: 48px;
  background: var(--bg-canvas);
  border: 1px solid var(--border-subtle);
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: bold;
  font-size: 0.8rem;
  color: var(--accent-primary);
  font-family: var(--font-sans);
}

.row-title h3 {
  margin-bottom: 0.2rem;
  font-size: 1.1rem;
}

.row-desc {
  font-size: 0.95rem;
  color: var(--text-muted);
}

.row-tag {
  font-family: var(--font-sans);
  font-size: 0.75rem;
  padding: 0.25rem 0.6rem;
  border-radius: 999px;
  text-align: center;
  font-weight: 600;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
}

/* Interactive Food Estimator Tool */
.estimator-tool {
  background: var(--bg-canvas);
  border: 1px solid var(--border-subtle);
  border-radius: 4px;
  padding: 2.2rem;
  margin: 3rem 0;
  box-shadow: var(--shadow-elevation);
}

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

.form-group label {
  display: block;
  font-family: var(--font-sans);
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.form-group select,
.form-group input,
.form-group textarea {
  width: 100%;
  padding: 0.75rem;
  border-radius: 4px;
  border: 1px solid var(--border-subtle);
  background: var(--bg-canvas);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 0.95rem;
}

.form-group select:focus,
.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--accent-primary);
}

.estimator-result {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-left: 4px solid var(--accent-primary);
  padding: 1.25rem;
  border-radius: 0 4px 4px 0;
  font-size: 0.98rem;
}

/* Table styling with overflow protection */
.table-responsive {
  width: 100%;
  overflow-x: auto;
  margin: 2rem 0;
  border: 1px solid var(--border-subtle);
  border-radius: 4px;
}

table.data-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.94rem;
}

table.data-table th,
table.data-table td {
  padding: 0.9rem 1.1rem;
  border-bottom: 1px solid var(--border-subtle);
}

table.data-table th {
  background: var(--bg-surface);
  font-family: var(--font-sans);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 700;
}

/* Collapsible Accordion Registers */
.accordion-item {
  border-bottom: 1px solid var(--border-subtle);
}

.accordion-trigger {
  width: 100%;
  text-align: left;
  background: none;
  border: none;
  padding: 1.25rem 0;
  font-family: var(--font-serif);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-primary);
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
}

.accordion-trigger:hover {
  color: var(--accent-primary);
}

.accordion-content {
  display: none;
  padding-bottom: 1.25rem;
  color: var(--text-muted);
}

.accordion-content.is-open {
  display: block;
}

/* Breadcrumbs */
.breadcrumb-nav {
  font-family: var(--font-sans);
  font-size: 0.8rem;
  margin: 1.5rem 0;
  color: var(--text-muted);
}

.breadcrumb-nav a {
  color: var(--text-primary);
  text-decoration: none;
}

.breadcrumb-nav a:hover {
  color: var(--accent-primary);
}

/* Footer (Paper Letterpress Style) */
footer.site-footer {
  background-color: var(--bg-surface);
  border-top: 1px solid var(--border-subtle);
  padding: 3.5rem 0 2rem;
  font-family: var(--font-sans);
  font-size: 0.88rem;
  color: var(--text-muted);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 2.5rem;
  margin-bottom: 2.5rem;
}

.footer-brand {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
  display: block;
}

.footer-nav-col h5 {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-primary);
  margin-bottom: 1rem;
}

.footer-nav-col ul {
  list-style: none;
}

.footer-nav-col li {
  margin-bottom: 0.5rem;
}

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

.footer-nav-col a:hover {
  color: var(--accent-primary);
}

.footer-bottom {
  border-top: 1px solid var(--border-subtle);
  padding-top: 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
  font-size: 0.8rem;
}

/* Responsive Queries */
@media (max-width: 900px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  .register-row {
    grid-template-columns: 60px 1fr;
    gap: 0.8rem;
  }
  .row-desc, .row-tag {
    grid-column: 2 / 3;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .mobile-nav-toggle {
    display: block;
  }
  nav.main-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    background: var(--bg-canvas);
    border-bottom: 1px solid var(--border-subtle);
    padding: 1.25rem 1.5rem;
    box-shadow: var(--shadow-elevation);
  }
  nav.main-nav.is-open {
    display: block;
  }
  nav.main-nav ul {
    flex-direction: column;
    align-items: flex-start;
    gap: 1rem;
  }
  .estimator-grid {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr;
  }
}

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