:root {
            --primary-color: #205747;
            --primary-light: #397b60;
            --primary-dark: #12392e;
            --text-color: #333;
            --light-gray: #f5f5f5;
            --white: #ffffff;
        }
        
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        
        body {
            color: var(--text-color);
            line-height: 1.6;
            background-color: var(--light-gray);
            transition: all 0.3s ease;
        }
        
        body.menu-open {
            overflow: hidden;
        }
        
        /* Шапка */
        header {
            background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
            color: var(--white);
            padding: 1.5rem 0;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
            position: relative;
        }
        
        .header-container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            position: relative;
        }
        
        .header-title {
            font-size: 2rem;
            margin: 0 auto;
            position: absolute;
            left: 50%;
            transform: translateX(-50%);
            width: max-content;
        }
        
        /* Кнопка меню */
        .menu-btn {
            background: none;
            border: none;
            color: var(--white);
            font-size: 1.5rem;
            cursor: pointer;
            padding: 8px;
            z-index: 1;
            transition: transform 0.3s ease;
        }
        
        .menu-btn:hover {
            transform: scale(1.1);
        }
        
        /* Выдвижное меню */
        .mobile-menu {
            position: fixed;
            top: 0;
            left: -300px;
            width: 280px;
            height: 100%;
            background-color: var(--white);
            box-shadow: 2px 0 10px rgba(0, 0, 0, 0.1);
            z-index: 1000;
            transition: left 0.3s ease;
            overflow-y: auto;
        }
        
        .mobile-menu.open {
            left: 0;
        }
        
        .menu-header {
            background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
            color: var(--white);
            padding: 1.5rem;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        
        .close-menu {
            background: none;
            border: none;
            color: var(--white);
            font-size: 1.5rem;
            cursor: pointer;
        }
        
        .menu-items {
            padding: 1rem 0;
        }
        
        .menu-item {
            display: block;
            padding: 12px 20px;
            color: var(--text-color);
            text-decoration: none;
            transition: all 0.2s ease;
            border-left: 4px solid transparent;
        }
        
        .menu-item:hover {
            background-color: rgba(32,87,71, 0.05);
            border-left: 4px solid var(--primary-color);
            color: var(--primary-color);
        }
        
        .menu-icon {
            width: 24px;
            margin-right: 10px;
            text-align: center;
        }
        
        .menu-overlay {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background-color: rgba(0, 0, 0, 0.5);
            z-index: 999;
            opacity: 0;
            visibility: hidden;
            transition: all 0.3s ease;
        }
        
        .menu-overlay.open {
            opacity: 1;
            visibility: visible;
        }
        
        /* Основной контент */
        .main-container {
            max-width: 1200px;
            margin: 2rem auto;
            padding: 0 20px;
        }
        
        /* Контейнер дорожной карты */
        .roadmap-container {
            background: var(--white);
            padding: 2rem;
            border-radius: 12px;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
        }
        
        .roadmap-title {
            color: var(--primary-color);
            text-align: center;
            margin-bottom: 2rem;
            font-size: 2.2rem;
            position: relative;
        }
        
        .roadmap-title:after {
            content: '';
            display: block;
            width: 80px;
            height: 4px;
            background-color: var(--primary-color);
            margin: 15px auto 0;
            border-radius: 2px;
        }
        
        .roadmap-description {
            text-align: center;
            margin-bottom: 2rem;
            color: #666;
            font-size: 1.1rem;
            max-width: 800px;
            margin-left: auto;
            margin-right: auto;
        }
        
        /* Галерея презентации */
        .presentation-gallery {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 2rem;
            margin-top: 2rem;
        }
        
        .slide-item {
            background: var(--light-gray);
            border-radius: 12px;
            overflow: hidden;
            transition: all 0.3s ease;
            box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
        }
        
        .slide-item:hover {
            transform: translateY(-5px);
            box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
        }
        
        .slide-image {
            width: 100%;
            height: 200px;
            object-fit: cover;
            display: block;
        }
        
        .slide-content {
            padding: 1.5rem;
        }
        
        .slide-number {
            background: var(--primary-color);
            color: var(--white);
            width: 40px;
            height: 40px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: bold;
            margin-bottom: 1rem;
        }
        
        .slide-title {
            font-size: 1.2rem;
            color: var(--primary-dark);
            margin-bottom: 0.5rem;
            font-weight: 600;
        }
        
        .slide-description {
            color: #666;
            line-height: 1.5;
        }
        
        /* Навигация по слайдам */
        .slide-navigation {
            display: flex;
            justify-content: center;
            gap: 1rem;
            margin-top: 2rem;
            flex-wrap: wrap;
        }
        
        .nav-btn {
            padding: 10px 20px;
            background: var(--primary-color);
            color: var(--white);
            border: none;
            border-radius: 25px;
            cursor: pointer;
            transition: all 0.3s ease;
            font-weight: 500;
        }
        
        .nav-btn:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
        }
        
        /* Полноэкранный просмотр */
        .slide-modal {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0, 0, 0, 0.9);
            z-index: 1000;
            align-items: center;
            justify-content: center;
        }
        
        .modal-content {
            max-width: 90%;
            max-height: 90%;
            position: relative;
        }
        
        .modal-image {
            max-width: 100%;
            max-height: 80vh;
            border-radius: 8px;
        }
        
        .modal-close {
            position: absolute;
            top: -40px;
            right: 0;
            color: var(--white);
            font-size: 2rem;
            cursor: pointer;
            background: none;
            border: none;
        }
        
        .modal-nav {
            position: absolute;
            top: 50%;
            width: 100%;
            display: flex;
            justify-content: space-between;
            transform: translateY(-50%);
            padding: 0 20px;
        }
        
        .modal-nav-btn {
            background: rgba(255, 255, 255, 0.2);
            color: var(--white);
            border: none;
            width: 50px;
            height: 50px;
            border-radius: 50%;
            cursor: pointer;
            font-size: 1.5rem;
            transition: background 0.3s ease;
        }
        
        .modal-nav-btn:hover {
            background: rgba(255, 255, 255, 0.3);
        }
        
        /* Адаптивность */
        @media (max-width: 768px) {
            .header-title {
                font-size: 1.5rem;
                position: static;
                transform: none;
                margin: 0.5rem 0;
                order: 2;
                width: 100%;
                text-align: center;
                padding: 0 50px;
            }
            
            .header-container {
                flex-wrap: wrap;
            }
            
            .menu-btn {
                order: 1;
            }
            
            .main-container {
                margin: 1rem auto;
                padding: 0 15px;
            }
            
            .roadmap-container {
                padding: 1.5rem;
            }
            
            .roadmap-title {
                font-size: 1.8rem;
                margin-bottom: 1.5rem;
            }
            
            .presentation-gallery {
                grid-template-columns: 1fr;
                gap: 1.5rem;
            }
            
            .slide-content {
                padding: 1rem;
            }
            
            .slide-title {
                font-size: 1.1rem;
            }
            
            .slide-navigation {
                flex-direction: column;
                align-items: center;
            }
            
            .nav-btn {
                width: 100%;
                max-width: 250px;
                text-align: center;
            }
        }
        
        @media (max-width: 480px) {
            .header-title {
                font-size: 1.3rem;
                padding: 0 40px;
            }
            
            .roadmap-title {
                font-size: 1.5rem;
            }
            
            .roadmap-description {
                font-size: 1rem;
            }
            
            .slide-image {
                height: 180px;
            }
            
            .modal-nav-btn {
                width: 40px;
                height: 40px;
                font-size: 1.2rem;
            }
        }