/* Цветовая схема как на картинке */
    :root {
      --primary: #000;          /* Чёрный */
      --accent: #ff0000;        /* Красный — как заголовок */
      --highlight-bg: #f9f9f9;  /* Светло-серый фон для текста */
      --border: #ddd;
    }

    .cover-title {
      font-size: 3rem;
      font-weight: 900;
      text-transform: uppercase;
      letter-spacing: -1px;
      color: white;
      background-color: var(--accent);
      margin: 0;
      padding: 0.5rem 1rem;
      display: inline-block;
      border-radius: 4px;
    }

    .cover-subtitle {
      font-size: 1.2rem;
      font-weight: bold;
      color: var(--primary);
      margin: 0.5rem 0 1rem;
      padding-left: 1rem;
      border-left: 4px solid var(--accent);
    }

    .author {
      font-size: 0.75rem;
      color: #666;
      margin-bottom: 1.5rem;
      text-transform: uppercase;
    }

    .exercise-box {
      background-color: white;
      border: 2px solid var(--accent);
      padding: 1rem;
      border-radius: 8px;
      margin: 1.5rem 0;
      max-width: 300px;
      float: right;
      position: relative;
    }
 .exercise-box2 {
      background-color: white;
      border: 2px solid var(--accent);
      padding: 1rem;
      border-radius: 8px;
      margin: 1.5rem 0;
      max-width: 300px;
      
      position: relative;
    }


    .exercise-header {
      font-size: 1.1rem;
      font-weight: bold;
      color: var(--primary);
      margin-bottom: 0.5rem;
      display: flex;
      align-items: center;
    }

    .exercise-header::before {
      content: "◀";
      margin-right: 0.5rem;
      color: var(--accent);
      font-weight: bold;
    }

    .exercise-desc {
      font-size: 0.85rem;
      margin: 0.5rem 0;
      line-height: 1.4;
    }

    .page-footer {
      font-size: 0.7rem;
      color: #999;
      text-align: left;
      margin-top: 2rem;
      padding-top: 1rem;
      border-top: 1px solid var(--border);
    }

    /* Адаптация под маленькие экраны */
    @media (max-width: 480px) {
      .cover-title {
        font-size: 2.2rem;
        padding: 0.5rem;
      }
      .cover-subtitle {
        font-size: 0.9rem;
        padding-left: 0.5rem;
      }
      .exercise-box {
        max-width: 100%;
        float: none;
        margin: 1rem auto;
      }
      .page-footer {
        text-align: center;
      }
    }
.importance-header {
      position: relative;
      padding-left: 2rem;
      margin-bottom: 1rem;
    }

    .importance-title {
      font-size: 2.5rem;
      font-weight: 900;
      text-transform: uppercase;
      letter-spacing: -1px;
      color: white;
      background-color: var(--accent);
      display: inline-block;
      padding: 0.5rem 1rem;
      border-radius: 4px;
      margin: 0;
    }

    .big-letter-d {
      position: absolute;
      top: 0;
      left: 0;
      font-size: 10rem;
      font-weight: 900;
      color: var(--accent);
      opacity: 0.8;
      z-index: -1;
    }
 .main-text {
      font-size: 0.95rem;
      margin-bottom: 1.2rem;
      text-align: justify;
      line-height: 1.6;
    }

    .highlight {
      background-color: rgba(255, 0, 0, 0.1);
      padding: 0.1em 0.2em;
      font-weight: 600;
    }

    .note-box {
      background-color: var(--highlight-bg);
      padding: 1rem;
      border-radius: 8px;
      margin: 1.2rem 0;
      border-left: 3px solid var(--accent);
      font-size: 0.9rem;
    }

    @media (max-width: 480px) {
      .importance-title {
        font-size: 1.8rem;
        padding: 0.5rem;
      }
      .big-letter-d {
        font-size: 6rem;
      }
      .main-text {
        font-size: 0.9rem;
      }
    }
.section-title {
      font-size: 1.8rem;
      font-weight: 900;
      text-transform: uppercase;
      color: var(--primary);
      margin: 1.5rem 0 1rem;
      letter-spacing: -0.5px;
      border-bottom: 2px solid var(--accent);
      padding-bottom: 0.3rem;
    }

    .highlight-box {
      background-color: rgba(255, 0, 0, 0.05);
      padding: 1rem;
      border-radius: 8px;
      margin: 1.2rem 0;
      border-left: 3px solid var(--accent);
    }

    .main-text {
      font-size: 0.95rem;
      margin-bottom: 1.2rem;
      text-align: justify;
      line-height: 1.6;
    }

    .note {
      font-style: italic;
      font-size: 0.9rem;
      color: #666;
      margin: 0.6rem 0;
    }

    .exercise-list {
      display: flex;
      flex-direction: column;
      gap: 1rem;
      margin: 1.5rem 0;
    }

    .exercise-item {
      background-color: var(--light-bg);
      padding: 1rem;
      border-radius: 8px;
      border-left: 3px solid var(--accent);
    }

    .exercise-header {
      font-weight: bold;
      font-size: 1.05rem;
      margin-bottom: 0.5rem;
      color: var(--primary);
    }

    .principles-grid,
    .tactics-grid {
      display: grid;
      grid-template-columns: 1fr;
      gap: 1rem;
      margin: 1.5rem 0;
    }

    .principle-item,
    .tactic-item {
      background: white;
      border: 1px solid var(--border);
      padding: 1rem;
      border-radius: 8px;
    }

    .workout-table {
      width: 100%;
      border-collapse: collapse;
      margin: 1.2rem 0;
      font-size: 0.9rem;
    }

    .workout-table th,
    .workout-table td {
      padding: 0.6rem 0.4rem;
      text-align: left;
      border: 1px solid var(--border);
    }

    .workout-table th {
      background-color: rgba(255, 0, 0, 0.1);
      font-weight: bold;
    }

    .footnote {
      font-size: 0.85rem;
      color: #666;
      margin-top: 0.5rem;
      font-style: italic;
    }

    @media (max-width: 480px) {
      .section-title {
        font-size: 1.5rem;
      }
      .main-text,
      .exercise-item {
        font-size: 0.9rem;
      }
      .workout-table {
        font-size: 0.8rem;
      }
      .workout-table th,
      .workout-table td {
        padding: 0.4rem 0.2rem;
      }
    }