.banner {
      max-width: 100%;
      background: url('https://via.placeholder.com/900x1200/333/fff?text=Фон+грудных+мышц') no-repeat center center;
      background-size: cover;
      position: relative;
      overflow: hidden;
      box-shadow: 0 6px 20px rgba(0,0,0,0.2);
      padding: 2rem 1.5rem;
      text-align: center;
    }

    /* Верхняя полоса */
    .top-bar {
      background: #00b0ff;
      height: 8px;
      width: 100%;
      position: absolute;
      top: 0;
      left: 0;
    }

    /* Заголовок "BIG PECS MADE EASY" */
    .headline {
      color: #000;
      text-align: center;
      margin: 0;
      line-height: 1;
      padding: 1rem 0;
    }

    .headline-line {
      font-size: clamp(3rem, 12vw, 6rem);
      font-weight: 900;
      letter-spacing: -1px;
      margin: 0.5rem 0;
      text-transform: uppercase;
      display: block;
    }

    .headline-line:first-child {
      font-size: clamp(4rem, 14vw, 7rem);
    }

    /* Подзаголовок */
    .subhead {
      background: #fff;
      color: #222;
      padding: 0.7rem 1.5rem;
      font-size: 1.1rem;
      font-weight: 500;
      margin: 1rem 0 0;
      border-top: 2px solid #ddd;
      text-align: left;
      line-height: 1.5;
    }

    .subhead::before {
      content: "▶";
      margin-right: 0.5rem;
      color: #d32f2f;
    }

    /* Авторы */
    .author {
      color: #666;
      font-size: 0.9rem;
      font-style: italic;
      margin-top: 0.5rem;
      display: block;
      text-align: center;
    }

    @media (max-width: 600px) {
      .headline-line {
        font-size: 2.5rem;
      }
      .headline-line:first-child {
        font-size: 3rem;
      }
      .subhead {
        font-size: 0.9rem;
        padding: 0.5rem 1rem;
        text-align: center;
      }
    }
 h2 {
      font-size: 1.3rem;
      margin: 1.5rem 0 0.8rem;
      text-transform: uppercase;
    }
    p {
      margin: 0 0 1rem;
    }
    .exercise {
      margin: 1.2rem 0;
    }
    .exercise-title {
      font-weight: bold;
      margin: 0.8rem 0 0.4rem;
    }
    .exercise-desc {
      margin: 0.3rem 0 0;
      font-size: 0.95rem;
      color: #333;
    }
    .highlight {
      font-weight: bold;
      margin-top: 1.5rem;
      font-size: 1.1rem;
    }
.article {
      max-width: 100%;
      margin: 2rem auto;
      padding: 0 1.5rem;
    }

    .article h1 {
      font-size: 2.2rem;
      font-weight: 900;
      color: #d32f2f;
      text-align: center;
      margin-bottom: 1.5rem;
      text-transform: uppercase;
      letter-spacing: -0.5px;
    }

    .intro-box {
      background: #e8f5e8;
      padding: 1.2rem;
      margin-bottom: 1.5rem;
      border-radius: 6px;
      font-weight: 600;
      color: #2e7d32;
      text-align: center;
      font-size: 1.1rem;
    }

    .article p {
      margin: 0 0 1.4rem;
      font-size: 1.05rem;
      text-align: justify;
    }

    .section {
      margin: 2rem 0;
    }

    .section h2 {
      font-size: 1.6rem;
      font-weight: 800;
      color: #000;
      margin-bottom: 1rem;
      padding-bottom: 0.4rem;
      border-bottom: 2px solid #eee;
    }

    .highlight-box {
      background: #fff8e1;
      padding: 1rem;
      margin: 1.5rem 0;
      border-left: 4px solid #ffc107;
      font-style: italic;
    }

    table {
      width: 100%;
      border-collapse: collapse;
      margin: 1.5rem 0;
      background: white;
      box-shadow: 0 2px 6px rgba(0,0,0,0.05);
    }

    th, td {
      padding: 0.9rem 1rem;
      text-align: left;
      border-bottom: 1px solid #eee;
    }

    th {
      background-color: #e3f2fd;
      font-weight: 700;
      color: #0d47a1;
    }

    .note {
      font-style: italic;
      color: #666;
      font-size: 0.95rem;
      margin-top: 0.3rem;
    }

    @media (max-width: 600px) {
      .article h1 {
        font-size: 1.8rem;
      }
      .article {
        padding: 0 1rem;
      }
      th, td {
        font-size: 0.85rem;
        padding: 0.7rem 0.8rem;
      }
    }
 .exercise-card {
      background: white;
      border: 1px solid #ddd;
      border-radius: 6px;
      padding: 1rem;
      margin: 1rem 0;
      transition: transform 0.2s ease, box-shadow 0.2s ease;
      cursor: pointer;
    }

    .exercise-card:hover {
      transform: translateY(-2px);
      box-shadow: 0 4px 12px rgba(0,0,0,0.1);
      background: #fff;
    }

    .exercise-title {
      font-weight: bold;
      margin: 0.5rem 0 0.3rem;
      font-size: 1.1rem;
    }

    .exercise-meta {
      font-size: 0.95rem;
      color: #555;
      margin: 0.3rem 0;
    }

    .exercise-desc {
      font-size: 0.95rem;
      color: #333;
      margin: 0.5rem 0 0;
    }

    .highlight {
      font-weight: bold;
      margin-top: 1.5rem;
      text-align: center;
      font-size: 1.1rem;
    }