body.theme-v4 {
  --bg: #eef3fa;
  --text: #1a2744;
  --text-muted: #4a6080;
  --accent: #1e56a0;
  --card-bg: #ffffff;
  --border: #c5d5ea;
  --hero-bg: #1e56a0;
  --nav-bg: #1e56a0;
  --font-heading: 'Trebuchet MS', sans-serif;
  --photo-radius: 16px;
  --btn-text: #fff;
}

.theme-v4 .hero { color: #fff; padding: 80px 24px; }
.theme-v4 .hero__label, .theme-v4 .hero__subtitle, .theme-v4 .hero__tagline { color: rgba(255,255,255,0.85); }
.theme-v4 .hero__title { color: #fff; }
.theme-v4 .hero__motto { background: rgba(255,255,255,0.1); border-color: #fff; color: #fff; }
.theme-v4 .nav__logo, .theme-v4 .nav__links a { color: #fff; }
.theme-v4 .btn--primary { background: #fff; color: #1e56a0; }
.theme-v4 .cards { grid-template-columns: repeat(3, 1fr); }
.theme-v4 .case { background: #eef3fa; }