:root {
  --canvas: #000000;
  --surface-soft: #0d0d0d;
  --surface-card: #1a1a1a;
  --surface-elevated: #262626;
  --carbon-gray: #2b2b2b;
  --hairline: #3c3c3c;
  --on-dark: #ffffff;
  --body-text: #bbbbbb;
  --body-strong: #e6e6e6;
  --muted: #7e7e7e;
  --m-blue-light: #0066b1;
  --m-blue-dark: #1c69d4;
  --m-red: #e22718;
  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  background: var(--canvas);
  color: var(--body-text);
  font-size: 16px;
  font-weight: 300;
  line-height: 1.5;
}

.m-stripe {
  height: 4px;
  background: linear-gradient(to right, var(--m-blue-light) 33.33%, var(--m-blue-dark) 33.33%, var(--m-blue-dark) 66.66%, var(--m-red) 66.66%);
  width: 100%;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  color: var(--on-dark);
  border: 1px solid var(--on-dark);
  padding: 14px 32px;
  height: 48px;
  border-radius: 0;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  cursor: pointer;
  font-family: var(--font);
  text-decoration: none;
}

.btn-outline-dark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  color: var(--muted);
  border: 1px solid var(--hairline);
  padding: 14px 32px;
  height: 48px;
  border-radius: 0;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  cursor: pointer;
  font-family: var(--font);
  text-decoration: none;
}

.top-nav {
  background: var(--canvas);
  border-bottom: 1px solid var(--hairline);
  height: 64px;
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  align-items: center;
}

.nav-container {
  max-width: 1440px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  width: 100%;
  gap: 40px;
}

.nav-logo {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 3px;
  color: var(--on-dark);
  text-decoration: none;
  text-transform: uppercase;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-logo-stripe {
  width: 4px;
  height: 20px;
  background: linear-gradient(to bottom, var(--m-blue-light) 33.33%, var(--m-blue-dark) 33.33%, var(--m-blue-dark) 66.66%, var(--m-red) 66.66%);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
  flex: 1;
}

.nav-link {
  color: var(--muted);
  font-size: 14px;
  font-weight: 400;
  letter-spacing: 0.5px;
  padding: 8px 16px;
  text-decoration: none;
  text-transform: uppercase;
  font-size: 12px;
}

.nav-link.active, .nav-link:hover {
  color: var(--on-dark);
  border-bottom: 2px solid var(--on-dark);
}

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 8px;
  background: none;
  border: none;
  margin-left: auto;
}

.hamburger span {
  width: 24px;
  height: 1px;
  background: var(--on-dark);
  display: block;
}

.mobile-menu {
  display: none;
  position: fixed;
  inset: 0;
  background: var(--canvas);
  z-index: 200;
  flex-direction: column;
  padding: 32px 24px;
  gap: 4px;
  overflow-y: auto;
}

.mobile-menu.open { display: flex; }

.mobile-menu .m-stripe { margin-bottom: 32px; }

.mobile-menu a {
  color: var(--on-dark);
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
  padding: 16px 0;
  border-bottom: 1px solid var(--hairline);
  text-decoration: none;
}

.mobile-menu-close {
  align-self: flex-end;
  background: none;
  border: none;
  color: var(--on-dark);
  font-size: 28px;
  cursor: pointer;
  margin-bottom: 24px;
}

.site-container {
  max-width: 1440px;
  margin: 0 auto;
  padding: 0 24px;
}

.section-band {
  padding: 96px 0;
}

.section-band-sm {
  padding: 48px 0;
}

.hero-band {
  background: var(--canvas);
  position: relative;
  overflow: hidden;
}

.hero-img-wrap {
  width: 100%;
  height: 520px;
  overflow: hidden;
  position: relative;
}

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

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to right, rgba(0,0,0,0.75) 50%, transparent);
  display: flex;
  align-items: center;
}

.hero-content {
  padding: 64px 24px;
  max-width: 1440px;
  margin: 0 auto;
  width: 100%;
}

.hero-eyebrow {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 3px;
  color: var(--muted);
  text-transform: uppercase;
  margin-bottom: 16px;
}

.hero-h1 {
  font-size: 72px;
  font-weight: 700;
  line-height: 1.0;
  letter-spacing: -1px;
  color: var(--on-dark);
  text-transform: uppercase;
  max-width: 700px;
  margin-bottom: 24px;
}

.hero-sub {
  font-size: 18px;
  font-weight: 300;
  color: var(--body-strong);
  max-width: 500px;
  margin-bottom: 40px;
  line-height: 1.5;
}

h1, h2, h3, h4 {
  color: var(--on-dark);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0;
}

h2 {
  font-size: 40px;
  line-height: 1.1;
  margin-bottom: 24px;
}

h3 {
  font-size: 24px;
  line-height: 1.3;
  margin-bottom: 16px;
}

h4 {
  font-size: 20px;
  line-height: 1.4;
  margin-bottom: 12px;
}

p { margin-bottom: 16px; color: var(--body-text); font-weight: 300; }
a { color: var(--on-dark); }

.label-uppercase {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--muted);
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.feature-card {
  background: var(--surface-card);
  border: 1px solid var(--hairline);
  padding: 0;
  overflow: hidden;
}

.feature-card-img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  display: block;
}

.feature-card-body {
  padding: 24px;
}

.feature-card-body .label-uppercase {
  display: block;
  margin-bottom: 12px;
}

.feature-card-body h3 {
  font-size: 20px;
  margin-bottom: 12px;
  text-transform: uppercase;
}

.feature-card-body p {
  font-size: 14px;
  color: var(--muted);
  line-height: 1.6;
  margin-bottom: 16px;
  font-weight: 300;
}

.text-link-up {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--on-dark);
  text-decoration: none;
}

.text-link-up::after { content: ' →'; }

.breadcrumb {
  padding: 16px 0;
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  font-weight: 400;
  letter-spacing: 0.5px;
  flex-wrap: wrap;
}

.breadcrumb a {
  color: var(--muted);
  text-decoration: none;
  text-transform: uppercase;
}

.breadcrumb-sep { color: var(--hairline); }
.breadcrumb-current { color: var(--body-strong); text-transform: uppercase; }

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

.faq-item summary {
  padding: 20px 0;
  font-size: 16px;
  font-weight: 700;
  color: var(--on-dark);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.faq-item summary::after {
  content: '+';
  font-size: 20px;
  color: var(--muted);
  flex-shrink: 0;
}

.faq-item[open] summary::after { content: '−'; }

.faq-item .faq-body {
  padding: 0 0 24px;
  color: var(--body-text);
  font-size: 15px;
  font-weight: 300;
  line-height: 1.7;
}

.toc-wrap {
  background: var(--surface-card);
  border-left: 4px solid var(--m-blue-dark);
  padding: 24px;
  margin-bottom: 40px;
}

.toc-title {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 16px;
}

.toc-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  list-style: none;
  counter-reset: toc;
}

.toc-list li {
  counter-increment: toc;
  display: flex;
  align-items: center;
  gap: 12px;
}

.toc-list li::before {
  content: counter(toc, decimal-leading-zero);
  font-size: 11px;
  font-weight: 700;
  color: var(--m-blue-dark);
  flex-shrink: 0;
}

.toc-list a {
  font-size: 14px;
  color: var(--body-text);
  font-weight: 300;
  text-decoration: none;
  letter-spacing: 0;
  text-transform: none;
}

.layout-guide {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 48px;
  align-items: start;
}

.guide-sidebar {
  position: sticky;
  top: 80px;
  background: var(--surface-soft);
  border: 1px solid var(--hairline);
  padding: 24px 0;
}

.guide-sidebar-title {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--muted);
  padding: 0 24px;
  margin-bottom: 16px;
}

.guide-sidebar-nav {
  display: flex;
  flex-direction: column;
}

.guide-sidebar-nav a {
  font-size: 13px;
  font-weight: 400;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  color: var(--muted);
  padding: 12px 24px;
  text-decoration: none;
  border-left: 3px solid transparent;
}

.guide-sidebar-nav a.active {
  color: var(--on-dark);
  border-left-color: var(--m-blue-dark);
}

.article-content {
  min-width: 0;
}

.article-content h2 {
  font-size: 32px;
  padding-top: 48px;
  border-top: 1px solid var(--hairline);
  margin-top: 48px;
  margin-bottom: 24px;
}

.article-content h2:first-of-type {
  padding-top: 0;
  border-top: none;
  margin-top: 0;
}

.article-content h3 {
  font-size: 20px;
  margin-top: 32px;
  margin-bottom: 16px;
}

.article-content p {
  font-size: 16px;
  font-weight: 300;
  line-height: 1.7;
  color: var(--body-text);
}

.article-content ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 16px;
  padding-left: 0;
}

.article-content ul li {
  font-size: 15px;
  font-weight: 300;
  color: var(--body-text);
  padding-left: 20px;
  position: relative;
  line-height: 1.6;
}

.article-content ul li::before {
  content: '—';
  position: absolute;
  left: 0;
  color: var(--m-blue-dark);
}

.disclaimer-block {
  background: var(--surface-soft);
  border-left: 3px solid var(--m-red);
  padding: 16px 20px;
  margin: 24px 0;
}

.disclaimer-block p {
  font-size: 13px;
  color: var(--muted);
  font-weight: 300;
  margin: 0;
  line-height: 1.6;
}

.related-section {
  background: var(--surface-card);
  padding: 40px;
  margin-top: 64px;
  border-top: 1px solid var(--hairline);
}

.related-section h3 {
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 24px;
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 16px;
}

.related-card {
  background: var(--surface-elevated);
  border: 1px solid var(--hairline);
  padding: 20px;
}

.related-card h4 {
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--on-dark);
  margin-bottom: 8px;
}

.related-card p {
  font-size: 13px;
  color: var(--muted);
  font-weight: 300;
  line-height: 1.5;
  margin-bottom: 12px;
}

.related-card a {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--on-dark);
  text-decoration: none;
}

.spec-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--hairline);
  margin: 24px 0;
  border: 1px solid var(--hairline);
}

.spec-cell {
  background: var(--surface-soft);
  padding: 24px;
}

.spec-value {
  font-size: 32px;
  font-weight: 700;
  color: var(--on-dark);
  text-transform: uppercase;
  line-height: 1;
  margin-bottom: 8px;
}

.spec-label {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--muted);
}

.contact-form-wrap {
  max-width: 640px;
}

.form-field { margin-bottom: 24px; }

.form-field label {
  display: block;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 8px;
}

.form-field input,
.form-field textarea {
  width: 100%;
  background: var(--surface-card);
  border: 1px solid var(--hairline);
  border-radius: 0;
  color: var(--on-dark);
  font-family: var(--font);
  font-size: 16px;
  font-weight: 300;
  padding: 12px 16px;
  height: 48px;
  outline: none;
}

.form-field input:focus,
.form-field textarea:focus {
  border-color: var(--on-dark);
}

.form-field textarea { height: 120px; resize: vertical; }

.form-error {
  display: none;
  font-size: 12px;
  color: var(--m-red);
  margin-top: 4px;
  letter-spacing: 0.5px;
}

.form-success {
  display: none;
  background: var(--surface-card);
  border-left: 3px solid var(--m-blue-dark);
  padding: 20px 24px;
  color: var(--on-dark);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  font-size: 14px;
  margin-top: 24px;
}

.cookie-banner {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--surface-soft);
  border-top: 1px solid var(--hairline);
  z-index: 999;
  padding: 24px;
  display: none;
}

.cookie-inner {
  max-width: 1440px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  flex-wrap: wrap;
}

.cookie-inner p {
  font-size: 14px;
  font-weight: 300;
  color: var(--muted);
  margin: 0;
}

.cookie-inner a { color: var(--on-dark); }

.cookie-actions { display: flex; gap: 16px; flex-shrink: 0; }

.footer-dark {
  background: var(--canvas);
  border-top: 1px solid var(--hairline);
  padding: 64px 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 48px;
}

.footer-brand h3 {
  font-size: 18px;
  font-weight: 700;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--on-dark);
  margin-bottom: 16px;
}

.footer-brand p {
  font-size: 14px;
  font-weight: 300;
  color: var(--muted);
  line-height: 1.6;
  margin-bottom: 12px;
  text-transform: none;
}

.footer-col h4 {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 16px;
}

.footer-col ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.footer-col ul a {
  font-size: 14px;
  font-weight: 300;
  color: var(--muted);
  text-decoration: none;
  text-transform: none;
}

.footer-bottom {
  border-top: 1px solid var(--hairline);
  padding: 20px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}

.footer-copyright {
  font-size: 12px;
  color: var(--muted);
  font-weight: 300;
}

.footer-legal {
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
}

.footer-legal a {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--muted);
  text-decoration: none;
}

.text-page-wrap {
  max-width: 800px;
}

.text-page-wrap h1 {
  font-size: 48px;
  margin-bottom: 8px;
}

.text-page-wrap h2 {
  font-size: 24px;
  margin-top: 40px;
  margin-bottom: 16px;
  font-size: 20px;
}

.text-page-wrap p {
  font-size: 15px;
  font-weight: 300;
  color: var(--body-text);
  line-height: 1.7;
}

.text-page-wrap ul {
  list-style: disc;
  padding-left: 24px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 16px;
}

.text-page-wrap ul li {
  font-size: 15px;
  font-weight: 300;
  color: var(--body-text);
}

@media (max-width: 1024px) {
  .layout-guide {
    grid-template-columns: 1fr;
  }
  .guide-sidebar { position: static; }
  .card-grid { grid-template-columns: 1fr 1fr; }
  .spec-grid { grid-template-columns: 1fr 1fr; }
  .hero-h1 { font-size: 52px; }
}

@media (max-width: 768px) {
  .nav-links { display: none; }
  .hamburger { display: flex; }
  .card-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .hero-h1 { font-size: 40px; }
  .section-band { padding: 48px 0; }
  .cookie-inner { flex-direction: column; align-items: flex-start; }
  h2 { font-size: 28px; }
  .hero-img-wrap { height: 380px; }
}

@media (max-width: 480px) {
  .spec-grid { grid-template-columns: 1fr; }
  .hero-h1 { font-size: 32px; }
}