:root {
  --bg-canvas: #ffffff;
  --bg-surface: #f1f5f9;
  --bg-surface-alt: #f8fafc;
  --text-primary: #1e293b;
  --text-muted: #64748b;
  --text-inverted: #ffffff;
  --accent-primary: #9333ea;
  --accent-hover: #7e22ce;
  --accent-surface: #fae8ff;
  --accent-border: #e9d5ff;
  --border-subtle: #e2e8f0;
  --border-dark: #cbd5e1;
  --color-a: #16a34a;
  --color-b: #65a30d;
  --color-c: #ca8a04;
  --color-d: #ea580c;
  --color-e: #dc2626;
  --color-f: #991b1b;
  --color-g: #7f1d1d;
  --font-sans: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  --ease-kinetic: cubic-bezier(0.16, 1, 0.3, 1);
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-elevation: 0 10px 25px -5px rgba(147, 51, 234, 0.12), 0 8px 10px -6px rgba(0, 0, 0, 0.05);
  --radius: 4px;
  --container-max: 1100px;
}

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

body {
  font-family: var(--font-sans);
  background-color: var(--bg-canvas);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-wrap: anywhere;
  hyphens: auto;
  -webkit-font-smoothing: antialiased;
}

/* Monospace Utilities & Micro-Typography */
.mono-label {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--accent-primary);
  font-weight: 600;
}

.mono-metric {
  font-family: var(--font-mono);
  font-weight: 700;
}

/* Floating Inset Pill Header (Static Flow) */
.header-wrapper {
  position: relative;
  width: 100%;
  padding: 1.25rem 1rem;
  background-color: #ffffff;
  border-bottom: 1px solid var(--border-subtle);
}

.header-pill {
  max-width: var(--container-max);
  margin: 0 auto;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: 9999px;
  padding: 0.6rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

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

.brand-symbol {
  width: 28px;
  height: 28px;
  background-color: var(--accent-primary);
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #ffffff;
  font-family: var(--font-mono);
  font-weight: 900;
  font-size: 0.85rem;
}

.brand-name {
  font-family: var(--font-mono);
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}

.desktop-nav {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.nav-link {
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-primary);
  transition: color 0.2s var(--ease-kinetic);
}

.nav-link:hover, .nav-link.active {
  color: var(--accent-primary);
}

.btn-pill {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.55rem 1.25rem;
  border-radius: 9999px;
  background-color: var(--accent-primary);
  color: #ffffff;
  font-weight: 600;
  font-size: 0.875rem;
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: transform 0.2s var(--ease-kinetic), background-color 0.2s, box-shadow 0.2s;
}

.btn-pill:hover {
  background-color: var(--accent-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow-elevation);
}

.mobile-nav-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.75rem;
  line-height: 1;
  color: var(--text-primary);
  cursor: pointer;
  padding: 0 0.5rem;
}

/* Mobile Dropdown Menu */
.mobile-drawer {
  display: none;
  position: absolute;
  top: 100%;
  left: 1rem;
  right: 1rem;
  background: #ffffff;
  border: 1px solid var(--border-subtle);
  border-radius: 8px;
  padding: 1rem;
  box-shadow: 0 10px 30px rgba(0,0,0,0.1);
  z-index: 100;
}

.mobile-drawer.open {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.mobile-drawer a {
  text-decoration: none;
  color: var(--text-primary);
  font-size: 1rem;
  padding: 0.5rem 0.25rem;
  border-bottom: 1px solid var(--border-subtle);
}

/* Zebra Section Architecture */
.section-band {
  width: 100%;
  padding: 4.5rem 1.5rem;
}

.section-band.band-white {
  background-color: var(--bg-canvas);
}

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

.band-inner {
  max-width: var(--container-max);
  margin: 0 auto;
}

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

/* Hero Component */
.hero-band {
  position: relative;
  min-height: 60vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: #0f172a;
  overflow: hidden;
  color: var(--text-inverted);
  padding: 5rem 1.5rem;
}

.hero-bg-media {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.35;
  filter: contrast(1.1);
}

.hero-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(180deg, rgba(15, 23, 42, 0.4) 0%, rgba(15, 23, 42, 0.85) 100%);
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 820px;
  margin: 0 auto;
}

.hero-badge {
  display: inline-block;
  padding: 0.3rem 0.8rem;
  background: rgba(147, 51, 234, 0.25);
  border: 1px solid rgba(147, 51, 234, 0.6);
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #fae8ff;
  margin-bottom: 1.5rem;
}

.hero-title {
  font-size: clamp(2rem, 4vw, 3.25rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.15;
  margin-bottom: 1.25rem;
}

.hero-sub {
  font-size: 1.125rem;
  color: #cbd5e1;
  max-width: 65ch;
  margin: 0 auto 2rem;
  line-height: 1.6;
}

/* Typography Standards */
h2.section-heading {
  font-size: 2rem;
  letter-spacing: -0.02em;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.75rem;
}

p.section-lead {
  font-size: 1.125rem;
  color: var(--text-muted);
  margin-bottom: 2.5rem;
  max-width: 72ch;
}

/* Cards & Layouts */
.grid-3 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.75rem;
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 2rem;
}

.spec-card {
  background: #ffffff;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform 0.25s var(--ease-kinetic), box-shadow 0.25s var(--ease-kinetic);
}

.spec-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-elevation);
}

.card-media-wrap {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background-color: #e2e8f0;
}

.card-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.card-tag {
  position: absolute;
  top: 10px;
  left: 10px;
  background: rgba(30, 41, 59, 0.85);
  backdrop-filter: blur(4px);
  color: #ffffff;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  padding: 0.25rem 0.6rem;
  border-radius: var(--radius);
  text-transform: uppercase;
  border-left: 3px solid var(--accent-primary);
}

.card-body {
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.card-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 0.6rem;
  letter-spacing: -0.01em;
}

.card-copy {
  font-size: 0.95rem;
  color: var(--text-muted);
  margin-bottom: 1.25rem;
  flex-grow: 1;
}

.card-footer {
  padding-top: 1rem;
  border-top: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* Rating Scale Visualizer Bars */
.rating-scale-box {
  background: #ffffff;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius);
  padding: 1.75rem;
  margin-bottom: 2rem;
}

.scale-stack {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  margin: 1.5rem 0;
}

.scale-row {
  display: grid;
  grid-template-columns: 50px 1fr 140px;
  align-items: center;
  gap: 1rem;
  font-family: var(--font-mono);
  font-size: 0.85rem;
}

.scale-tier {
  font-weight: 800;
  color: #ffffff;
  padding: 0.25rem 0.5rem;
  text-align: center;
  border-radius: 2px;
}

.scale-tier.t-a { background: var(--color-a); }
.scale-tier.t-b { background: var(--color-b); }
.scale-tier.t-c { background: var(--color-c); }
.scale-tier.t-d { background: var(--color-d); }
.scale-tier.t-e { background: var(--color-e); }
.scale-tier.t-f { background: var(--color-f); }
.scale-tier.t-g { background: var(--color-g); }

.scale-bar-track {
  height: 10px;
  background: var(--bg-surface);
  border-radius: 999px;
  overflow: hidden;
}

.scale-bar-fill {
  height: 100%;
}

/* Formula & Math Monospace Callouts */
.math-spec-callout {
  background: #1e293b;
  color: #f8fafc;
  border-radius: var(--radius);
  padding: 2rem;
  margin: 2rem 0;
  border-left: 5px solid var(--accent-primary);
}

.math-spec-callout pre, .math-spec-callout code {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  color: #fae8ff;
  line-height: 1.5;
}

/* Data Tables */
.table-responsive {
  width: 100%;
  overflow-x: auto;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius);
  background: #ffffff;
  margin: 1.5rem 0;
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.9rem;
}

.data-table th, .data-table td {
  padding: 0.85rem 1.25rem;
  border-bottom: 1px solid var(--border-subtle);
}

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

.data-table tr:hover {
  background-color: var(--bg-surface-alt);
}

/* Interactive Calculator Terminal */
.terminal-card {
  background: #ffffff;
  border: 1px solid var(--border-dark);
  border-radius: var(--radius);
  padding: 2rem;
  box-shadow: var(--shadow-elevation);
}

.terminal-header {
  border-bottom: 1px solid var(--border-subtle);
  padding-bottom: 1rem;
  margin-bottom: 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.25rem;
  margin-bottom: 1.5rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.form-group label {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
}

.form-input, .form-select, .form-textarea {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  padding: 0.65rem 0.85rem;
  border: 1px solid var(--border-dark);
  border-radius: var(--radius);
  background: #ffffff;
  color: var(--text-primary);
}

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

.terminal-results {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius);
  padding: 1.5rem;
  margin-top: 1.5rem;
}

.result-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.5rem 0;
  border-bottom: 1px dashed var(--border-subtle);
}

.result-row:last-child {
  border-bottom: none;
  padding-top: 0.75rem;
  font-weight: 700;
}

.action-row {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  margin-top: 1.25rem;
}

/* FAQ Accordion Styling */
.faq-item {
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius);
  background: #ffffff;
  margin-bottom: 1rem;
  overflow: hidden;
}

.faq-question {
  width: 100%;
  text-align: left;
  padding: 1.25rem 1.5rem;
  background: none;
  border: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-primary);
  cursor: pointer;
}

.faq-icon {
  font-family: var(--font-mono);
  font-size: 1.25rem;
  color: var(--accent-primary);
  transition: transform 0.2s var(--ease-kinetic);
}

.faq-answer {
  display: none;
  padding: 0 1.5rem 1.25rem 1.5rem;
  color: var(--text-muted);
  line-height: 1.6;
}

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

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

/* Scroll reveal utility */
.reveal-init {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.6s var(--ease-kinetic), transform 0.6s var(--ease-kinetic);
}

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

/* Long-Form Legal & Editorial Content */
.legal-body h2 {
  font-size: 1.5rem;
  margin: 2rem 0 0.75rem;
  color: var(--text-primary);
}

.legal-body p {
  margin-bottom: 1.25rem;
  color: #334155;
  font-size: 0.975rem;
}

.legal-body ul {
  margin: 0 0 1.5rem 1.5rem;
  color: #334155;
}

.legal-body li {
  margin-bottom: 0.5rem;
}

/* Floating Container Footer */
.site-footer-wrapper {
  max-width: var(--container-max);
  margin: 3rem auto 2.5rem;
  padding: 0 1rem;
}

.site-footer {
  background: #0f172a;
  color: #94a3b8;
  border-radius: 8px;
  padding: 3.5rem 2.5rem 2rem;
  font-size: 0.9rem;
}

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

.footer-col h4 {
  font-family: var(--font-mono);
  color: #f8fafc;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 1.25rem;
}

.footer-col ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.footer-col a {
  color: #94a3b8;
  text-decoration: none;
  transition: color 0.2s;
}

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

.footer-meta {
  padding-top: 2rem;
  border-top: 1px solid #1e293b;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  font-size: 0.825rem;
}

.footer-legal-tagline {
  color: #64748b;
  line-height: 1.5;
  margin-top: 0.5rem;
}

/* Responsiveness */
@media (max-width: 900px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .desktop-nav {
    display: none;
  }
  .mobile-nav-toggle {
    display: block;
  }
  .scale-row {
    grid-template-columns: 40px 1fr 90px;
    font-size: 0.75rem;
  }
  .hero-band {
    min-height: 50vh;
    padding: 3.5rem 1rem;
  }
  .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}}