/* Дополнительные стили для улучшения отображения исторических периодов */
.period-timeline {
    position: relative;
    margin: 30px 0;
    padding-left: 30px;
}

.period-timeline::before {
    content: '';
    position: absolute;
    left: 15px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(to bottom, var(--custom-primary), var(--custom-secondary));
}

.period-item {
    position: relative;
    margin-bottom: 30px;
    padding: 20px;
    background: white;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.period-item::before {
    content: '';
    position: absolute;
    left: -38px;
    top: 25px;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--custom-secondary);
    border: 3px solid white;
    box-shadow: 0 0 0 2px var(--custom-secondary);
}

.period-year {
    font-weight: bold;
    color: var(--custom-primary);
    margin-bottom: 10px;
    font-size: 1.2rem;
}

.period-content {
    padding-left: 10px;
}

.inventor-list {
    margin-top: 15px;
    padding-left: 20px;
}

.inventor-list li {
    margin-bottom: 8px;
    position: relative;
}

.inventor-list li::before {
    content: '•';
    color: var(--custom-secondary);
    font-weight: bold;
    position: absolute;
    left: -15px;
}

.tech-highlight {
    background-color: rgba(44, 62, 80, 0.1);
    padding: 2px 6px;
    border-radius: 4px;
    font-weight: 500;
}

.period-badge {
    display: inline-block;
    padding: 5px 10px;
    background: linear-gradient(135deg, var(--custom-primary), var(--custom-secondary));
    color: white;
    border-radius: 20px;
    font-size: 0.8rem;
    margin-bottom: 10px;
}

/* Стили для таблицы поколений */
.generations-table {
    width: 100%;
    border-collapse: collapse;
    margin: 25px 0;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    border-radius: 8px;
    overflow: hidden;
}

.generations-table th {
    background: linear-gradient(135deg, var(--custom-primary), var(--custom-secondary));
    color: white;
    padding: 15px;
    text-align: left;
    font-weight: 500;
}

.generations-table td {
    padding: 12px 15px;
    border-bottom: 1px solid #eee;
}

.generations-table tr:nth-child(even) {
    background-color: #f8f9fa;
}

.generations-table tr:hover {
    background-color: #e9ecef;
}

.generation-number {
    font-weight: bold;
    color: var(--custom-primary);
}

/* Стили для подробного описания этапов */
.era-details {
    background: #f8f9fa;
    padding: 25px;
    border-radius: 8px;
    margin: 25px 0;
    border-left: 4px solid var(--custom-secondary);
}

.era-title {
    color: var(--custom-primary);
    border-bottom: 2px solid var(--custom-secondary);
    padding-bottom: 10px;
    margin-bottom: 20px;
    font-size: 1.4rem;
}

.era-subtitle {
    color: var(--custom-secondary);
    font-weight: 500;
    margin: 15px 0 10px 0;
}

.key-invention {
    background: white;
    padding: 15px;
    border-radius: 6px;
    margin: 15px 0;
    border-left: 3px solid var(--custom-primary);
}

.consequences-list {
    padding-left: 20px;
}

.consequences-list li {
    margin-bottom: 8px;
    position: relative;
}

.consequences-list li::before {
    content: '→';
    color: var(--custom-secondary);
    font-weight: bold;
    position: absolute;
    left: -15px;
}

/* Стили для мобильной адаптации таблицы */
@media (max-width: 768px) {
    .generations-table {
        display: block;
        overflow-x: auto;
    }
    
    .era-details {
        padding: 15px;
    }
    
    .period-timeline {
        padding-left: 20px;
    }
    
    .period-item::before {
        left: -28px;
    }
}

@media (max-width: 480px) {
    .period-timeline {
        padding-left: 15px;
    }
    
    .period-item {
        padding: 15px;
    }
    
    .period-item::before {
        left: -23px;
        width: 12px;
        height: 12px;
    }
    
    .era-details {
        padding: 15px;
    }
    
    .key-invention {
        padding: 10px;
    }
}