:root {
      --font-main: 'Georgia', serif;
      --font-heading: 'Helvetica Neue', Arial, sans-serif;
      --color-text: #333;
      --color-accent: #c00;
      --color-bg: #fff;
      --color-light: #f9f9f9;
    }

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

    body {
      font-family: var(--font-main);
      line-height: 1.6;
      color: var(--color-text);
      background-color: var(--color-bg);
      padding: 1rem;
    }

    .container {
      max-width: 1000px;
      margin: 0 auto;
    }

    h1 {
      font-family: var(--font-heading);
      font-size: 2.2rem;
      text-align: center;
      margin: 1.5rem 0;
      color: var(--color-accent);
    }

    .section {
      margin-bottom: 2.5rem;
    }

    .section h2 {
      font-family: var(--font-heading);
      font-size: 1.6rem;
      margin: 1.5rem 0 1rem;
      color: var(--color-accent);
    }

    .research-card {
      background: var(--color-light);
      padding: 1.4rem;
      border-radius: 8px;
      margin: 1.5rem 0;
    }

    .research-card h3 {
      font-family: var(--font-heading);
      margin-bottom: 0.8rem;
      color: #000;
    }

    .assumption,
    .result,
    .research,
    .application {
      margin-bottom: 1rem;
    }

    .assumption strong,
    .result strong,
    .research strong,
    .application strong {
      display: block;
      margin-bottom: 0.4rem;
      font-family: var(--font-heading);
    }

    .tip-list {
      margin-top: 1.2rem;
    }

    .tip {
      margin-bottom: 1.2rem;
    }

    .tip h3 {
      font-family: var(--font-heading);
      font-size: 1.3rem;
      margin-bottom: 0.6rem;
      color: var(--color-accent);
    }

    @media (max-width: 600px) {
      h1 {
        font-size: 1.8rem;
      }
      .section h2 {
        font-size: 1.4rem;
      }
    }
  .section {
      margin-bottom: 2.5rem;
    }

    .section h2 {
      font-family: var(--font-heading);
      font-size: 1.6rem;
      margin: 1.5rem 0 1rem;
      color: var(--color-accent);
    }

    .subsection h3 {
      font-family: var(--font-heading);
      font-size: 1.3rem;
      margin: 1.2rem 0 0.6rem;
      color: #000;
    }

    .workout-table {
      width: 100%;
      margin: 1rem 0;
      border-collapse: collapse;
    }

    .workout-table th,
    .workout-table td {
      padding: 0.6rem;
      text-align: left;
      border-bottom: 1px solid #ddd;
    }

    .workout-table th {
      background-color: var(--color-light);
      font-weight: bold;
    }

    .note {
      font-style: italic;
      margin: 0.8rem 0;
      padding-left: 1rem;
      border-left: 3px solid var(--color-accent);
      color: #555;
    }

    .profile {
      background: var(--color-light);
      padding: 1.4rem;
      border-radius: 8px;
      margin: 1.5rem 0;
    }

    @media (max-width: 600px) {
      h1 {
        font-size: 1.8rem;
      }
      .workout-table {
        font-size: 0.9rem;
      }
    }