:root {
  --color-canvas: #0a0a0a;
  --color-surface-soft: #121212;
  --color-surface-card: #1a1a1a;
  --color-surface-elevated: #242424;
  --color-primary: #faff69;
  --color-on-primary: #0a0a0a;
  --color-on-dark: #ffffff;
  --color-body: #cccccc;
  --color-body-strong: #e6e6e6;
  --color-muted: #888888;
  --color-muted-soft: #5a5a5a;
  --color-hairline: #2a2a2a;
  --color-hairline-strong: #3a3a3a;
  --font-main: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, monospace;
  --rounded-xs: 4px;
  --rounded-sm: 6px;
  --rounded-md: 8px;
  --rounded-lg: 12px;
  --rounded-pill: 9999px;
}

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

body {
  font-family: var(--font-main);
  font-size: 16px;
  line-height: 1.55;
  color: var(--color-body);
  background: var(--color-canvas);
}

a { color: var(--color-primary); text-decoration: none; }
a:focus-visible { outline: 2px solid var(--color-primary); outline-offset: 2px; }
img { max-width: 100%; height: auto; display: block; }

.um-container { max-width: 1280px; margin: 0 auto; padding: 0 24px; }

.um-topnav {
  background: var(--color-canvas);
  border-bottom: 1px solid var(--color-hairline);
  position: sticky;
  top: 0;
  z-index: 100;
  height: 64px;
}
.um-topnav-inner {
  display: flex;
  align-items: center;
  height: 64px;
  gap: 32px;
}
.um-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  flex-shrink: 0;
}
.um-logo-mark {
  background: var(--color-primary);
  color: var(--color-on-primary);
  font-weight: 700;
  font-size: 12px;
  letter-spacing: 1px;
  padding: 4px 8px;
  border-radius: var(--rounded-xs);
}
.um-logo-text { font-size: 16px; font-weight: 700; color: var(--color-on-dark); letter-spacing: -0.3px; }
.um-nav-links { display: flex; list-style: none; gap: 4px; margin-left: auto; }
.um-nav-link {
  display: block;
  padding: 8px 14px;
  font-size: 14px;
  font-weight: 500;
  color: var(--color-muted);
  border-radius: var(--rounded-md);
  transition: color 0.15s;
}
.um-nav-link.active, .um-nav-link:focus { color: var(--color-on-dark); }
.um-hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  margin-left: auto;
}
.um-hamburger span { display: block; width: 20px; height: 2px; background: var(--color-on-dark); border-radius: 2px; }

.um-hero {
  padding: 96px 0;
  background: var(--color-canvas);
}
.um-hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}
.um-hero-badge {
  display: inline-flex;
  align-items: center;
  background: var(--color-surface-card);
  color: var(--color-on-dark);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  padding: 4px 12px;
  border-radius: var(--rounded-pill);
  margin-bottom: 20px;
  border: 1px solid var(--color-hairline-strong);
}
.um-hero-h1 {
  font-size: 56px;
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -2px;
  color: var(--color-on-dark);
  margin-bottom: 20px;
}
.um-hero-desc {
  font-size: 18px;
  color: var(--color-body);
  line-height: 1.55;
  margin-bottom: 32px;
}
.um-hero-stats {
  display: flex;
  gap: 32px;
  flex-wrap: wrap;
}
.um-stat-num {
  font-size: 36px;
  font-weight: 700;
  letter-spacing: -1px;
  color: var(--color-primary);
  display: block;
}
.um-stat-label { font-size: 13px; color: var(--color-muted); }

.um-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 20px;
  height: 40px;
  font-size: 14px;
  font-weight: 600;
  border-radius: var(--rounded-md);
  border: none;
  cursor: pointer;
  text-decoration: none;
  transition: background 0.15s;
  font-family: var(--font-main);
}
.um-btn-primary { background: var(--color-primary); color: var(--color-on-primary); }
.um-btn-secondary { background: var(--color-surface-card); color: var(--color-on-dark); border: 1px solid var(--color-hairline); }

.um-section { padding: 96px 0; }
.um-section-soft { background: var(--color-surface-soft); }
.um-section-yellow { background: var(--color-primary); }

.um-section-eyebrow { font-size: 12px; font-weight: 600; letter-spacing: 1.5px; text-transform: uppercase; color: var(--color-muted); margin-bottom: 12px; }
.um-section-title { font-size: 40px; font-weight: 700; letter-spacing: -1.5px; color: var(--color-on-dark); margin-bottom: 12px; line-height: 1.15; }
.um-section-title-dark { color: var(--color-on-primary); }
.um-section-desc { font-size: 16px; color: var(--color-body); margin-bottom: 48px; max-width: 600px; }
.um-section-desc-dark { color: rgba(10,10,10,0.7); }

.um-card-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.um-card {
  background: var(--color-surface-card);
  border-radius: var(--rounded-lg);
  padding: 32px;
  border: 1px solid var(--color-hairline);
  display: flex;
  flex-direction: column;
}
.um-card-badge {
  display: inline-flex;
  align-items: center;
  background: var(--color-canvas);
  border: 1px solid var(--color-hairline);
  color: var(--color-muted);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 1px;
  text-transform: uppercase;
  padding: 3px 10px;
  border-radius: var(--rounded-pill);
  margin-bottom: 16px;
  width: fit-content;
}
.um-card-title {
  font-size: 18px;
  font-weight: 600;
  color: var(--color-on-dark);
  letter-spacing: -0.3px;
  margin-bottom: 10px;
}
.um-card-desc { font-size: 14px; color: var(--color-body); line-height: 1.55; flex-grow: 1; margin-bottom: 20px; }
.um-card-link { font-size: 14px; font-weight: 600; color: var(--color-primary); }

.um-cta-band {
  background: var(--color-primary);
  border-radius: var(--rounded-lg);
  padding: 64px;
  text-align: center;
}
.um-cta-band-title { font-size: 40px; font-weight: 700; letter-spacing: -1.5px; color: var(--color-on-primary); margin-bottom: 12px; }
.um-cta-band-desc { font-size: 16px; color: rgba(10,10,10,0.7); margin-bottom: 28px; }

.um-breadcrumb { padding: 16px 0 8px; }
.um-breadcrumb-list { display: flex; list-style: none; gap: 8px; font-size: 13px; color: var(--color-muted); flex-wrap: wrap; }
.um-breadcrumb-item + .um-breadcrumb-item::before { content: '/'; margin-right: 8px; color: var(--color-muted-soft); }
.um-breadcrumb-item a { color: var(--color-muted); }

.um-article-layout {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 48px;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
}

.um-article-sidebar {
  padding-top: 32px;
  position: sticky;
  top: 80px;
  height: fit-content;
}
.um-sidebar-heading { font-size: 11px; font-weight: 600; letter-spacing: 1.5px; text-transform: uppercase; color: var(--color-muted); margin-bottom: 12px; }
.um-sidebar-list { list-style: none; margin-bottom: 28px; }
.um-sidebar-link {
  display: block;
  padding: 7px 12px;
  font-size: 14px;
  color: var(--color-muted);
  border-radius: var(--rounded-md);
  margin-bottom: 2px;
}
.um-sidebar-link.active { background: var(--color-surface-card); color: var(--color-on-dark); border: 1px solid var(--color-hairline); }

.um-article-main { padding: 32px 0 48px; }
.um-article h1 { font-size: 40px; font-weight: 700; letter-spacing: -1.5px; color: var(--color-on-dark); line-height: 1.15; margin-bottom: 16px; }
.um-article h2 { font-size: 28px; font-weight: 700; letter-spacing: -0.5px; color: var(--color-on-dark); margin: 40px 0 14px; scroll-margin-top: 80px; }
.um-article h3 { font-size: 20px; font-weight: 600; color: var(--color-on-dark); margin: 28px 0 10px; scroll-margin-top: 80px; }
.um-article p { font-size: 16px; line-height: 1.7; color: var(--color-body); margin-bottom: 16px; }
.um-article ul, .um-article ol { margin: 0 0 16px 24px; }
.um-article li { font-size: 16px; line-height: 1.7; color: var(--color-body); margin-bottom: 6px; }
.um-article a { color: var(--color-primary); }

.um-toc {
  background: var(--color-surface-card);
  border-radius: var(--rounded-lg);
  padding: 20px 24px;
  border: 1px solid var(--color-hairline);
  margin-bottom: 32px;
}
.um-toc-title { font-size: 11px; font-weight: 600; letter-spacing: 1.5px; text-transform: uppercase; color: var(--color-muted); margin-bottom: 14px; }
.um-toc-list { list-style: none; }
.um-toc-item { margin-bottom: 6px; }
.um-toc-sub { padding-left: 16px; }
.um-toc-item a { font-size: 14px; color: var(--color-primary); }

.um-disclaimer-box {
  background: var(--color-surface-card);
  border: 1px solid var(--color-hairline);
  border-left: 3px solid var(--color-primary);
  border-radius: var(--rounded-md);
  padding: 14px 18px;
  font-size: 13px;
  color: var(--color-muted);
  margin: 24px 0;
  line-height: 1.6;
}

.um-related { margin-top: 48px; padding-top: 32px; border-top: 1px solid var(--color-hairline); }
.um-related-title { font-size: 22px; font-weight: 700; letter-spacing: -0.5px; color: var(--color-on-dark); margin-bottom: 20px; }
.um-related-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.um-related-card {
  background: var(--color-surface-card);
  border: 1px solid var(--color-hairline);
  border-radius: var(--rounded-lg);
  padding: 20px;
  text-decoration: none;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.um-related-card-title { font-size: 14px; font-weight: 600; color: var(--color-primary); }
.um-related-card-desc { font-size: 13px; color: var(--color-muted); }

.um-footer {
  background: var(--color-canvas);
  border-top: 1px solid var(--color-hairline);
  padding: 64px 0 32px;
  margin-top: 96px;
}
.um-footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 48px; margin-bottom: 48px; }
.um-footer-col {}
.um-footer-logo { display: flex; align-items: center; gap: 8px; font-size: 15px; font-weight: 700; color: var(--color-on-dark); margin-bottom: 12px; }
.um-footer-desc { font-size: 14px; color: var(--color-muted); line-height: 1.6; margin-bottom: 14px; }
.um-footer-contact { font-size: 13px; color: var(--color-muted-soft); }
.um-footer-contact a { color: var(--color-muted); }
.um-footer-col-title { font-size: 12px; font-weight: 600; letter-spacing: 1.2px; text-transform: uppercase; color: var(--color-muted-soft); margin-bottom: 14px; }
.um-footer-links { list-style: none; }
.um-footer-links li { margin-bottom: 8px; }
.um-footer-links a { font-size: 14px; color: var(--color-muted); }
.um-footer-disclaimers { border-top: 1px solid var(--color-hairline); padding-top: 24px; margin-bottom: 20px; }
.um-footer-disclaimers p { font-size: 12px; color: var(--color-muted-soft); line-height: 1.5; margin-bottom: 8px; }
.um-footer-bottom { font-size: 12px; color: var(--color-muted-soft); }

.um-cookie-banner {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--color-surface-card);
  border-top: 1px solid var(--color-hairline);
  padding: 16px 24px;
  z-index: 9999;
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}
.um-cookie-text { font-size: 14px; color: var(--color-body); flex-grow: 1; }
.um-cookie-text a { color: var(--color-primary); }
.um-cookie-btns { display: flex; gap: 12px; }
.um-cookie-accept { background: var(--color-primary); color: var(--color-on-primary); border: none; padding: 8px 20px; border-radius: var(--rounded-md); font-size: 13px; font-weight: 600; cursor: pointer; font-family: var(--font-main); }
.um-cookie-reject { background: transparent; color: var(--color-muted); border: 1px solid var(--color-hairline-strong); padding: 8px 16px; border-radius: var(--rounded-md); font-size: 13px; cursor: pointer; font-family: var(--font-main); }

.um-form-group { margin-bottom: 20px; }
.um-form label { display: block; font-size: 14px; font-weight: 600; color: var(--color-on-dark); margin-bottom: 6px; }
.um-form input, .um-form textarea {
  width: 100%;
  background: var(--color-surface-card);
  border: 1px solid var(--color-hairline-strong);
  border-radius: var(--rounded-md);
  padding: 10px 14px;
  font-size: 15px;
  font-family: var(--font-main);
  color: var(--color-on-dark);
  height: 44px;
  transition: border-color 0.15s;
}
.um-form input:focus, .um-form textarea:focus { outline: none; border-color: var(--color-primary); }
.um-form textarea { height: auto; min-height: 120px; }
.um-form-confirmation { display: none; font-size: 15px; font-weight: 600; color: var(--color-on-primary); background: var(--color-primary); padding: 12px 16px; border-radius: var(--rounded-md); margin-top: 16px; }

@media (max-width: 1024px) {
  .um-article-layout { grid-template-columns: 200px 1fr; gap: 32px; }
  .um-card-grid { grid-template-columns: repeat(2, 1fr); }
  .um-footer-grid { grid-template-columns: 1fr 1fr; }
  .um-related-grid { grid-template-columns: repeat(2, 1fr); }
  .um-hero-h1 { font-size: 44px; }
}

@media (max-width: 768px) {
  .um-article-layout { grid-template-columns: 1fr; }
  .um-article-sidebar { display: none; }
  .um-hero-grid { grid-template-columns: 1fr; }
  .um-hero-h1 { font-size: 36px; }
  .um-card-grid { grid-template-columns: 1fr; }
  .um-footer-grid { grid-template-columns: 1fr; }
  .um-hamburger { display: flex; }
  .um-nav-links { display: none; position: absolute; top: 100%; left: 0; right: 0; background: var(--color-surface-card); flex-direction: column; padding: 12px; border-bottom: 1px solid var(--color-hairline); z-index: 200; }
  .um-nav-links.open { display: flex; }
  .um-topnav { position: relative; }
  .um-related-grid { grid-template-columns: 1fr; }
  .um-section { padding: 48px 0; }
  .um-hero { padding: 48px 0; }
}

@media (max-width: 480px) {
  .um-hero-h1 { font-size: 28px; letter-spacing: -1px; }
  .um-section-title { font-size: 28px; }
  .um-cta-band { padding: 32px 20px; }
  .um-cta-band-title { font-size: 28px; }
}