/* Секция программных сессий */
.sessions-section {
    padding: 80px 0;
    background: #ffffff;
}

/* Заголовок секции */
.section-title {
    text-align: center;
    margin-bottom: 60px;
}

.section-title h2 {
    font-size: 2.5rem;
    font-weight: 700;
    color: #2c3e50;
    margin-bottom: 15px;
}

.section-title p {
    font-size: 1.1rem;
    color: #7f8c8d;
    max-width: 600px;
    margin: 0 auto;
}

/* Контейнер сессий */
.sessions-container {
    display: grid;
    gap: 30px;
}

.sessions-columns-1 {
    grid-template-columns: 1fr;
    max-width: 800px;
    margin: 0 auto;
}

.sessions-columns-2 {
    grid-template-columns: repeat(2, 1fr);
}

/* Карточка сессии */
.session-detail-card {
    background: white;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    overflow: hidden;
    transition: all 0.3s ease;
    border: 1px solid #f0f0f0;
}

.session-detail-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
}

/* Заголовок сессии */
.session-header {
    display: flex;
    align-items: flex-start;
    padding: 30px 30px 20px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.session-icon {
    width: 60px;
    height: 60px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: 20px;
    flex-shrink: 0;
}

.session-icon i {
    font-size: 1.5rem;
    color: white;
}

.session-title {
    flex: 1;
}

.session-title h3 {
    font-size: 1.3rem;
    font-weight: 600;
    margin: 0 0 10px 0;
    color: white;
    line-height: 1.4;
}

.session-duration {
    background: rgba(255, 255, 255, 0.2);
    padding: 5px 12px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 500;
}

/* Тело сессии */
.session-body {
    padding: 25px 30px;
}

.session-description {
    color: #6c757d;
    line-height: 1.6;
    margin-bottom: 25px;
    font-size: 1rem;
}

/* Темы сессии */
.session-topics {
    margin-bottom: 25px;
}

.session-topics h4 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 15px;
    color: #2c3e50;
}

.session-topics ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.session-topics li {
    position: relative;
    padding-left: 20px;
    margin-bottom: 8px;
    color: #555;
    line-height: 1.5;
}

.session-topics li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: #667eea;
    font-weight: bold;
    font-size: 1.2rem;
}

/* Спикеры сессии */
.session-speakers h4 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 15px;
    color: #2c3e50;
}

.speakers-list {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
}

.session-speaker {
    display: flex;
    align-items: center;
    background: #f8f9fa;
    padding: 10px 15px;
    border-radius: 25px;
    transition: all 0.3s ease;
}

.session-speaker:hover {
    background: #e9ecef;
    transform: translateY(-2px);
}

.session-speaker img {
    width: 35px;
    height: 35px;
    border-radius: 50%;
    margin-right: 10px;
    object-fit: cover;
}

.session-speaker span {
    font-size: 0.9rem;
    font-weight: 500;
    color: #2c3e50;
}

/* Анимации */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 0.6s ease forwards;
}

@keyframes fadeInUp {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Задержки для анимации */
.session-detail-card:nth-child(1) { animation-delay: 0.1s; }
.session-detail-card:nth-child(2) { animation-delay: 0.2s; }
.session-detail-card:nth-child(3) { animation-delay: 0.3s; }
.session-detail-card:nth-child(4) { animation-delay: 0.4s; }

/* Адаптивность */
@media (max-width: 992px) {
    .sessions-section {
        padding: 60px 0;
    }
    
    .section-title h2 {
        font-size: 2rem;
    }
    
    .sessions-columns-2 {
        grid-template-columns: 1fr;
    }
    
    .session-header {
        padding: 25px 25px 15px;
    }
    
    .session-body {
        padding: 20px 25px;
    }
}

@media (max-width: 768px) {
    .session-header {
        flex-direction: column;
        text-align: center;
    }
    
    .session-icon {
        margin-right: 0;
        margin-bottom: 15px;
    }
    
    .section-title {
        margin-bottom: 40px;
    }
    
    .speakers-list {
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .sessions-section {
        padding: 40px 0;
    }
    
    .section-title h2 {
        font-size: 1.75rem;
    }
    
    .session-header {
        padding: 20px 20px 15px;
    }
    
    .session-body {
        padding: 20px;
    }
    
    .session-icon {
        width: 50px;
        height: 50px;
    }
    
    .session-icon i {
        font-size: 1.3rem;
    }
}

/* Дополнительные варианты стилей */
.sessions-compact .session-detail-card {
    margin-bottom: 20px;
}

.sessions-compact .session-header {
    padding: 20px 25px 15px;
}

.sessions-compact .session-body {
    padding: 20px 25px;
}

.sessions-minimal .session-detail-card {
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
}

.sessions-minimal .session-detail-card:hover {
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.12);
}