data-analysis-books-container {
    max-width: 1000px;
    margin: 0 auto;
}

.data-analysis-books-header {
    text-align: center;
    margin-bottom: 40px;
    padding: 30px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 15px;
    backdrop-filter: blur(10px);
}

.data-analysis-books-header h1 {
    color: #d4af37;
    font-size: 2.5em;
    margin: 0 0 15px 0;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
}

.data-analysis-books-header-subtitle {
    font-size: 1.3em;
    color: #001e51;
    font-style: italic;
}

.data-analysis-books-section {
    margin: 40px 0;
    
    
}

.data-analysis-books-section-title {
    color: #d4af37;
    font-size: 1.8em;
    margin-bottom: 25px;
    padding-bottom: 10px;
    border-bottom: 2px solid rgba(212, 175, 55, 0.3);
    display: flex;
    align-items: center;
}

.data-analysis-books-section-icon {
    font-size: 1.2em;
    margin-right: 10px;
}

.data-analysis-books-item {
    background: rgba(22, 22, 255, 0.6);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    padding: 25px;
    margin: 20px 0;
    backdrop-filter: blur(10px);
    transition: all 0.3s ease;
    position: relative;
}

.data-analysis-books-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 25px rgba(0, 0, 0, 0.3);
    border-color: rgba(212, 175, 55, 0.3);
}

.data-analysis-books-rank {
    position: absolute;
    top: -10px;
    left: 20px;
    background: linear-gradient(45deg, #d4af37, #ffd700);
    color: #1a1a2e;
    font-weight: bold;
    font-size: 1.2em;
    padding: 8px 15px;
    border-radius: 20px;
    box-shadow: 0 4px 10px rgba(212, 175, 55, 0.3);
}

.data-analysis-books-title {
    color: #001e51;
    font-size: 1.4em;
    font-weight: bold;
    margin: 10px 0 15px 0;
}

.data-analysis-books-description {
    color: #151414;
    line-height: 1.7;
    margin-bottom: 20px;
}

.data-analysis-books-highlight-text {
    color: #d4af37;
    font-style: italic;
    font-weight: bold;
}

.data-analysis-books-amazon-button {
    display: inline-block;
    background: linear-gradient(45deg, #ff6b35, #ff8e53);
    color: white;
    text-decoration: none;
    padding: 10px 20px;
    border-radius: 20px;
    font-weight: bold;
    font-size: 0.9em;
    transition: all 0.3s ease;
    box-shadow: 0 4px 10px rgba(255, 107, 53, 0.3);
}

.data-analysis-books-amazon-button:hover {
    background: linear-gradient(45deg, #ff8e53, #ff6b35);
    transform: translateY(-2px);
    box-shadow: 0 6px 15px rgba(255, 107, 53, 0.4);
}

.data-analysis-books-detective-note {
    background: rgba(100, 149, 237, 0.1);
    border-left: 4px solid #6495ed;
    padding: 20px;
    margin: 30px 0;
    border-radius: 0 10px 10px 0;
    font-style: italic;
}

.data-analysis-books-detective-note strong {
    color: #87ceeb;
}

.data-analysis-books-footer-note {
    text-align: center;
    margin-top: 50px;
    padding: 20px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 10px;
    color: #a0a0a0;
    font-size: 0.9em;
}

.data-analysis-books-basic-tier {
    border-left: 4px solid #4ade80;
}

.data-analysis-books-tool-tier {
    border-left: 4px solid #3b82f6;
}

.data-analysis-books-business-tier {
    border-left: 4px solid #f59e0b;
}