body[data-brand="site-a"] {
  --bg: #f7f9ff;
  --surface: #ffffff;
  --surface-alt: #eaf0ff;
  --text: #0a0d16;
  --muted: #566078;
  --line: #cad4ec;
  --accent: #1557ff;
  --accent-ink: #ffffff;
  --radius: 3px;
  --display-font: Impact, Haettenschweiler, 'Arial Narrow Bold', sans-serif;
  --body-font: Inter, ui-sans-serif, system-ui, sans-serif;
  background: var(--bg);
  letter-spacing: -.012em;
}

body[data-brand="site-a"] .shell { max-width: 1320px; }
body[data-brand="site-a"] .site-header { background: rgba(247,249,255,.93); border-bottom: 1px solid var(--line); backdrop-filter: blur(14px); }
body[data-brand="site-a"] .brand { font-family: var(--display-font); font-size: 1.35rem; letter-spacing: .03em; text-transform: uppercase; }
body[data-brand="site-a"] .brand-mark { display: inline-grid; place-items: center; width: 2rem; height: 2rem; margin-right: .55rem; background: var(--text); color: var(--accent-ink); font-family: var(--body-font); font-size: .8rem; font-weight: 800; }
body[data-brand="site-a"] .main-nav { font-size: .78rem; font-weight: 750; letter-spacing: .08em; text-transform: uppercase; }
body[data-brand="site-a"] .main-nav a { text-decoration-thickness: 2px; text-underline-offset: .35rem; }
body[data-brand="site-a"] .btn { border-radius: 0; font-size: .78rem; font-weight: 800; letter-spacing: .08em; text-transform: uppercase; box-shadow: 4px 4px 0 var(--text); transition: transform .16s ease, box-shadow .16s ease; }
body[data-brand="site-a"] .btn:hover { transform: translate(2px,2px); box-shadow: 2px 2px 0 var(--text); }
body[data-brand="site-a"] .btn-primary { background: var(--accent); }
body[data-brand="site-a"] .btn-secondary { background: var(--surface); border-color: var(--text); }

body[data-brand="site-a"] .hero { position: relative; display: grid; grid-template-columns: minmax(0,1.05fr) minmax(350px,.95fr); gap: clamp(2rem,6vw,7rem); min-height: 610px; padding-block: clamp(4.5rem,8vw,7rem) 3rem; overflow: hidden; }
body[data-brand="site-a"] .hero::before { content: 'ANDROID'; position: absolute; top: 1.6rem; left: 0; color: var(--line); font: 800 clamp(3rem,7vw,6.25rem)/1.02 var(--display-font); letter-spacing: -.015em; white-space: nowrap; z-index: -1; }
body[data-brand="site-a"] .hero-copy { align-self: center; max-width: 760px; }
body[data-brand="site-a"] .eyebrow { color: var(--accent); font-size: .75rem; font-weight: 850; letter-spacing: .15em; text-transform: uppercase; }
body[data-brand="site-a"] .hero-title, body[data-brand="site-a"] .page-hero h1 { max-width: 12ch; font-family: var(--display-font); font-size: clamp(3rem,5.7vw,5rem); font-weight: 900; line-height: 1.04; letter-spacing: -.015em; text-transform: uppercase; }
body[data-brand="site-a"] .hero-lead { max-width: 50ch; margin-top: 1.4rem; font-size: clamp(1.05rem,1.35vw,1.2rem); line-height: 1.55; }
body[data-brand="site-a"] .hero-actions { margin-top: 1.75rem; }
body[data-brand="site-a"] .hero-visual { align-self: center; transform: rotate(2deg); }
body[data-brand="site-a"] .device-stack { position: relative; min-height: 480px; padding: 2rem 0 0 2rem; }
body[data-brand="site-a"] .device-card { border: 2px solid var(--text); border-radius: 0; background: var(--surface); box-shadow: 14px 14px 0 var(--accent); }
body[data-brand="site-a"] .device-card:nth-child(2) { transform: translate(-2.3rem,2rem) rotate(-5deg); }
body[data-brand="site-a"] .device-screen { border-radius: 0; background: var(--text); }
body[data-brand="site-a"] .device-screen .screen-top { color: var(--accent-ink); }
body[data-brand="site-a"] .app-grid { gap: .65rem; }
body[data-brand="site-a"] .app-tile { border-radius: 0; border: 1px solid #2a3350; }
body[data-brand="site-a"] .compatibility-strip { background: var(--text); color: #fff; border-block: 4px solid var(--accent); font-weight: 800; letter-spacing: .06em; text-transform: uppercase; }

body[data-brand="site-a"] .section { padding-block: clamp(4.5rem,9vw,9rem); }
body[data-brand="site-a"] .section-heading { max-width: 720px; border-left: 7px solid var(--accent); padding-left: 1.35rem; }
body[data-brand="site-a"] .section-heading h2, body[data-brand="site-a"] .manifesto h2, body[data-brand="site-a"] .closing h2 { font-family: var(--display-font); font-size: clamp(2.8rem,5.5vw,5.5rem); line-height: .88; letter-spacing: -.035em; text-transform: uppercase; }
body[data-brand="site-a"] .feature-grid { grid-template-columns: repeat(4,1fr); gap: 0; border-top: 1px solid var(--text); border-left: 1px solid var(--text); }
body[data-brand="site-a"] .feature-card { min-height: 245px; border: 0; border-right: 1px solid var(--text); border-bottom: 1px solid var(--text); border-radius: 0; background: transparent; padding: 1.5rem; }
body[data-brand="site-a"] .feature-card:nth-child(odd) { background: var(--surface-alt); }
body[data-brand="site-a"] .feature-card h3, body[data-brand="site-a"] .usecase-card h3 { font-family: var(--display-font); font-size: 1.65rem; line-height: .95; letter-spacing: .01em; text-transform: uppercase; }
body[data-brand="site-a"] .manifesto { border-block: 1px solid var(--text); background: var(--accent); color: var(--accent-ink); }
body[data-brand="site-a"] .manifesto .shell { display: grid; grid-template-columns: .85fr 1.15fr; gap: 4rem; }
body[data-brand="site-a"] .manifesto .section-heading { border-left-color: var(--accent-ink); }
body[data-brand="site-a"] .manifesto .section-heading > p { color: var(--accent-ink); }
body[data-brand="site-a"] .manifesto h2 { color: var(--accent-ink); }
body[data-brand="site-a"] .usecase-grid { grid-template-columns: repeat(3, 1fr); gap: 1.25rem; }
body[data-brand="site-a"] .usecase-card { border-radius: 0; border-top: 6px solid var(--accent); background: var(--surface); box-shadow: 5px 5px 0 var(--line); }
body[data-brand="site-a"] .pricing-grid { align-items: stretch; }
body[data-brand="site-a"] .plan-card { border-radius: 0; border: 1px solid var(--text); box-shadow: none; }
body[data-brand="site-a"] .plan-card.featured { background: var(--text); color: #fff; transform: translateY(-.85rem); box-shadow: 8px 8px 0 var(--accent); }
body[data-brand="site-a"] .faq-list { border-top: 2px solid var(--text); }
body[data-brand="site-a"] .faq-list details { border-bottom: 1px solid var(--text); border-radius: 0; }
body[data-brand="site-a"] .closing { background: var(--surface-alt); color: var(--text); border-top: 1px solid var(--line); }
body[data-brand="site-a"] .closing .btn.btn-primary { border-color: var(--accent); color: var(--accent-ink); }
body[data-brand="site-a"] .site-footer { background: var(--text); color: #fff; }

body[data-brand="site-a"] .page-hero { background: var(--surface-alt); border-bottom: 1px solid var(--line); }
body[data-brand="site-a"] .content-narrow { max-width: 760px; }
body[data-brand="site-a"] .dashboard { background: #eef3ff; }
body[data-brand="site-a"] .sidebar { background: var(--text); color: #fff; border-radius: 0; }
body[data-brand="site-a"] .workspace { background: transparent; }
body[data-brand="site-a"] .panel, body[data-brand="site-a"] .stat-card, body[data-brand="site-a"] .table-wrap { border-radius: 0; border-color: var(--line); box-shadow: 4px 4px 0 #b9c8ec; }
body[data-brand="site-a"] .checkout-layout { align-items: start; }
body[data-brand="site-a"] .wallet-grid { gap: 1rem; }

@media (max-width: 780px) {
  body[data-brand="site-a"] .hero { grid-template-columns: 1fr; min-height: 0; padding-top: 7rem; }
  body[data-brand="site-a"] .hero::before { font-size: 3.25rem; }
  body[data-brand="site-a"] .hero-title, body[data-brand="site-a"] .page-hero h1 { font-size: 3rem; line-height: 1.05; }
  body[data-brand="site-a"] .hero-visual { max-width: 430px; margin-inline: auto; }
  body[data-brand="site-a"] .device-stack { min-height: 380px; }
  body[data-brand="site-a"] .feature-grid, body[data-brand="site-a"] .usecase-grid, body[data-brand="site-a"] .manifesto .shell { grid-template-columns: 1fr; }
  body[data-brand="site-a"] .feature-card { min-height: 0; }
  body[data-brand="site-a"] .plan-card.featured { transform: none; }
}