.hero {
      background: linear-gradient(135deg, #e6f4ff 0%, #cfeefe 50%, #bfeaff 100%);
      padding: 48px 12px;
      border-radius: 12px;
      margin-bottom: 20px;
      position: relative;
    }
    .language-switcher {
      position: absolute;
      top: 15px;
      right: 15px;
    }
    .converter-card { box-shadow: 0 6px 18px rgba(20,60,100,0.06); border-radius: 12px; }
    .faq .accordion-button { color: #0b66d0; font-weight: 600; }
    pre { background: #f8f9fa; padding: 12px; border-radius: 6px; }
    .hint { font-size: 0.9rem; color: #555; margin-top: 6px; }
    .error-hint { color: #d9534f; font-weight: 600; margin-top: 6px; }