<style>
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        
        body {
            font-family: 'Arial', sans-serif;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            height: 100vh;
            overflow: hidden;
        }
        
        .presentation-wrapper {
            display: flex;
            height: 100vh;
            width: 100vw;
        }
        
        /* Панель превью */
        .preview-panel {
            width: 250px;
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(10px);
            border-right: 2px solid rgba(255, 255, 255, 0.2);
            overflow-y: auto;
            padding: 15px 10px;
            box-shadow: 2px 0 10px rgba(0,0,0,0.1);
            z-index: 1000;
        }
        
        .preview-slide {
            width: 100%;
            height: 100px;
            background: #f8f9fa;
            border: 2px solid #dee2e6;
            border-radius: 8px;
            margin-bottom: 12px;
            cursor: pointer;
            transition: all 0.3s ease;
            padding: 8px;
            display: flex;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            text-align: center;
            position: relative;
        }
        
        .preview-slide:hover {
            border-color: #667eea;
            transform: scale(1.02);
            box-shadow: 0 3px 10px rgba(0,0,0,0.2);
        }
        
        .preview-slide.active {
            border-color: #667eea;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: white;
            box-shadow: 0 3px 10px rgba(0,0,0,0.3);
        }
        
        .preview-number {
            position: absolute;
            top: 3px;
            right: 6px;
            background: rgba(0,0,0,0.7);
            color: white;
            padding: 2px 5px;
            border-radius: 8px;
            font-size: 0.6rem;
            font-weight: bold;
        }
        
        .preview-title {
            font-size: 0.7rem;
            font-weight: bold;
            margin-bottom: 3px;
            line-height: 1.1;
        }
        
        .preview-desc {
            font-size: 0.5rem;
            opacity: 0.8;
            line-height: 1;
        }
        
        /* Основная презентация */
        .main-slides {
            flex: 1;
            height: 100vh;
            position: relative;
            overflow: hidden;
        }
        
        .slide {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100vh;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            display: flex;
            align-items: center;
            justify-content: center;
            opacity: 0;
            visibility: hidden;
            transition: all 0.5s ease;
            padding: 20px;
        }
        
        .slide.active {
            opacity: 1;
            visibility: visible;
            z-index: 10;
        }
        
        .slide-content {
            max-width: 900px;
            width: 100%;
            padding: 30px;
            background: rgba(255, 255, 255, 0.95);
            border-radius: 20px;
            box-shadow: 0 20px 40px rgba(0,0,0,0.1);
            backdrop-filter: blur(10px);
            animation: slideIn 0.6s ease-out;
        }
        
        .slide-image {
            width: 100%;
            height: 220px;
            background: #f8f9fa;
            border: 3px dashed #dee2e6;
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #6c757d;
            font-size: 1rem;
            margin-bottom: 20px;
            text-align: center;
            padding: 15px;
            transition: all 0.3s ease;
        }
        
        .slide-image:hover {
            background: #e9ecef;
            border-color: #adb5bd;
        }
        
        .slide-title {
            font-size: 2rem;
            font-weight: bold;
            color: #2c3e50;
            margin-bottom: 15px;
            text-align: center;
        }
        
        .slide-subtitle {
            font-size: 1.2rem;
            color: #34495e;
            text-align: center;
            margin-bottom: 25px;
        }
        
        .slide-text {
            font-size: 1rem;
            line-height: 1.6;
            color: #34495e;
            text-align: justify;
            margin-bottom: 15px;
        }
        
        .slide-list {
            font-size: 1rem;
            color: #34495e;
            margin-left: 20px;
        }
        
        .slide-list li {
            margin-bottom: 12px;
        }
        
        .slide-number {
            position: absolute;
            top: 15px;
            right: 15px;
            background: rgba(255, 255, 255, 0.9);
            padding: 5px 12px;
            border-radius: 15px;
            font-weight: bold;
            color: #2c3e50;
            z-index: 20;
        }
        
        /* Навигация */
        .nav-controls {
            position: fixed;
            bottom: 20px;
            left: 50%;
            transform: translateX(-50%);
            display: flex;
            gap: 10px;
            z-index: 1000;
        }
        
        .nav-btn {
            background: rgba(255, 255, 255, 0.9);
            border: none;
            border-radius: 50%;
            width: 50px;
            height: 50px;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: all 0.3s ease;
            font-size: 1.2rem;
            color: #2c3e50;
        }
        
        .nav-btn:hover {
            background: white;
            transform: scale(1.1);
        }
        
        .nav-btn:disabled {
            opacity: 0.5;
            cursor: not-allowed;
        }
        
        /* Прогресс */
        .progress-bar {
            position: fixed;
            top: 0;
            left: 250px;
            width: calc(100% - 250px);
            height: 4px;
            background: rgba(255,255,255,0.3);
            z-index: 1100;
        }
        
        .progress-fill {
            height: 100%;
            background: linear-gradient(90deg, #667eea, #764ba2);
            width: 0%;
            transition: width 0.3s ease;
        }
        
        .btn-primary {
            background: linear-gradient(45deg, #667eea, #764ba2);
            border: none;
            padding: 10px 25px;
            font-size: 1rem;
            border-radius: 20px;
            color: white;
            margin-top: 20px;
            transition: all 0.3s ease;
        }
        
        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 16px rgba(0,0,0,0.2);
        }
        
        .contact-info {
            background: #f8f9fa;
            padding: 15px;
            border-radius: 8px;
            margin-top: 15px;
        }
        
        /* Анимации */
        @keyframes slideIn {
            from {
                opacity: 0;
                transform: translateY(30px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        
        /* Адаптивность */
        @media (max-width: 768px) {
            .preview-panel {
                width: 200px;
            }
            
            .slide-title {
                font-size: 1.6rem;
            }
            
            .slide-content {
                padding: 20px;
                margin: 10px;
            }
            
            .slide-image {
                height: 150px;
                font-size: 0.9rem;
            }
        }
    </style>