.dragon-header {
    text-align: center;
    padding: 60px 20px;
    max-width: 900px;
    margin: 40px auto;
    background: linear-gradient(135deg, #fafafa, #eef2f5);
    border-radius: 16px;
    box-shadow: 0 8px 30px rgba(0,0,0,0.12);
    font-family: 'Georgia', serif;
    position: relative;
    overflow: hidden;
    border: 1px solid #d1d8e0;
}

.dragon-header::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, #e74c3c, #f39c12, #27ae60);
}

/* Основной заголовок */
.main-title {
    font-size: 4.5rem;
    font-weight: 900;
    letter-spacing: 2px;
    line-height: 1;
    margin: 0;
    color: #1a1a1a;
    text-transform: uppercase;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.1);
}

.main-title .line1 {
    font-size: 2rem;
    font-weight: 700;
    color: #2c3e50;
    display: block;
    margin-bottom: 5px;
    letter-spacing: 3px;
}

.main-title .line2 {
    font-size: 3.5rem;
    font-weight: 900;
    color: #e74c3c; /* акцентный красный */
    display: block;
    margin: 10px 0;
    text-shadow: 3px 3px 0 rgba(0,0,0,0.05);
}

.main-title .line3 {
    font-size: 5rem;
    font-weight: 900;
    color: #000;
    display: block;
    letter-spacing: 4px;
    position: relative;
    z-index: 2;
}

/* Подзаголовок */
.subtitle {
    font-size: 1.3rem;
    font-style: italic;
    color: #34495e;
    margin: 25px auto;
    line-height: 1.5;
    max-width: 700px;
    font-family: 'Times New Roman', serif;
}

/* Кредиты */
.credits {
    font-size: 0.95rem;
    font-family: 'Arial', sans-serif;
    color: #7f8c8d;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    margin-top: 20px;
    font-weight: 600;
}

/* Адаптивность */
@media (max-width: 768px) {
    .dragon-header {
        padding: 40px 15px;
    }

    .main-title .line1 {
        font-size: 1.6rem;
    }

    .main-title .line2 {
        font-size: 2.8rem;
    }

    .main-title .line3 {
        font-size: 3.8rem;
    }

    .subtitle {
        font-size: 1.1rem;
    }
}

@media (max-width: 480px) {
    .main-title .line3 {
        font-size: 3rem;
    }

    .subtitle {
        font-size: 1rem;
    }
}
.guide-letter {
    background: #fff;
    padding: 30px;
    margin-bottom: 40px;
    border-radius: 12px;
    box-shadow: 0 5px 20px rgba(0,0,0,0.08);
    border-left: 5px solid #e74c3c;
    position: relative;
    transition: transform 0.3s ease;
    font-family: 'Georgia', serif;
    line-height: 1.7;
    color: #2c3e50;
}

.guide-letter:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.12);
}

.letter-mark {
    position: absolute;
    top: -15px;
    left: -15px;
    width: 50px;
    height: 50px;
    background: #e74c3c;
    color: white;
    font-family: 'Oswald', sans-serif;
    font-size: 28px;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    box-shadow: 0 3px 8px rgba(0,0,0,0.2);
}

.guide-letter h3 {
    font-family: 'Oswald', sans-serif;
    font-size: 26px;
    color: #2c3e50;
    margin-top: 0;
    padding-left: 40px;
}

.guide-letter h3 strong {
    color: #e74c3c;
}

.guide-letter p {
    font-size: 17px;
    margin-bottom: 15px;
    text-align: justify;
}

.fact-box {
    background: #fef9e7;
    padding: 15px;
    border-radius: 8px;
    border-left: 4px solid #f39c12;
    font-style: italic;
    font-size: 15px;
    color: #7f8c8d;
    margin-top: 20px;
}

/* Адаптивность */
@media (max-width: 768px) {
    .guide-letter {
        padding: 20px;
    }

    .guide-letter h3 {
        font-size: 22px;
        padding-left: 30px;
    }

    .guide-letter p {
        font-size: 16px;
    }

    .letter-mark {
        width: 40px;
        height: 40px;
        font-size: 22px;
        top: -10px;
        left: -10px;
    }

    .fact-box {
        font-size: 14px;
        padding: 12px;
    }
}
.exercise-list {
    padding-left: 20px;
    margin: 15px 0;
}

.exercise-list li {
    margin-bottom: 6px;
    font-weight: 500;
    color: #27ae60;
}