:root {
      --bg: linear-gradient(135deg, #e7efff, #f7fafc);
      --primary: #4e8cff;
      --text: #2b2b2b;
      --card-bg: rgba(255, 255, 255, 0.9);
    }

    body {
      font-family: "Inter", system-ui, sans-serif;
      background: var(--bg);
      color: var(--text);
      margin: 0;
      padding: 0;
      text-align: center;
      scroll-behavior: smooth;
    }

    header, main, footer {
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
    }

    header {
      min-height: 100vh;
    }

    h1 {
      font-size: 2rem;
      margin-bottom: 1rem;
    }

    .controls {
      background: var(--card-bg);
      backdrop-filter: blur(10px);
      box-shadow: 0 4px 30px rgba(0, 0, 0, 0.1);
      border-radius: 20px;
      padding: 2rem;
      max-width: 400px;
      width: 90%;
      display: flex;
      flex-direction: column;
      gap: 1rem;
      align-items: center;
    }

    button {
      background: var(--primary);
      color: white;
      border: none;
      border-radius: 50px;
      padding: 0.75rem 1.5rem;
      font-size: 1.1rem;
      cursor: pointer;
      transition: all 0.2s ease;
      width: 120px;
    }

    button:hover {
      background: #3a6cd9;
      transform: scale(1.03);
    }

    select,
    input[type="range"] {
      width: 100%;
      cursor: pointer;
    }

    label {
      font-weight: 500;
    }

    .learn-more {
      background: white;
      padding: 4rem 1rem;
      text-align: left;
      max-width: 800px;
      margin: auto;
      border-radius: 20px 20px 0 0;
      box-shadow: 0 -2px 20px rgba(0, 0, 0, 0.05);
    }

    .faq h2 {
      text-align: center;
      margin-bottom: 2rem;
    }

    .faq-item {
      margin-bottom: 1.5rem;
    }

    .faq-item h3 {
      margin-bottom: 0.5rem;
      color: var(--primary);
    }

    .faq-item p {
      line-height: 1.6;
      color: #444;
    }

    footer {
      background: #f1f4f8;
      padding: 2rem;
      font-size: 0.9rem;
      color: #555;
      border-top: 1px solid #e0e0e0;
    }

    a {
      color: var(--primary);
      text-decoration: none;
    }

    a:hover {
      text-decoration: underline;
    }

    @media (max-width: 480px) {
      h1 {
        font-size: 1.6rem;
      }
      .controls {
        padding: 1.5rem;
      }
    }