:root {
            --primary: #6C5CE7;
            --secondary: #00CEFF;
            --dark: #2D3436;
            --light: #F5F6FA;
            --success: #00B894;
            --warning: #FDCB6E;
            --danger: #E17055;
        }
        
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        
        body {
            background-color: var(--light);
            color: var(--dark);
            line-height: 1.6;
        }
        
        .presentation {
            max-width: 1200px;
            margin: 0 auto;
            padding: 2rem;
        }
        
        header {
            text-align: center;
            margin-bottom: 3rem;
            padding: 2rem 0;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: white;
            border-radius: 16px;
            box-shadow: 0 10px 30px rgba(108, 92, 231, 0.2);
        }
        
        h1 {
            font-size: 3rem;
            margin-bottom: 1rem;
            font-weight: 800;
        }
        
        h2 {
            font-size: 2rem;
            margin: 2rem 0 1rem;
            color: var(--primary);
            font-weight: 700;
            border-bottom: 2px solid var(--secondary);
            padding-bottom: 0.5rem;
        }
        
        h3 {
            font-size: 1.5rem;
            margin: 1.5rem 0 0.5rem;
            color: var(--dark);
        }
        
        p {
            margin-bottom: 1rem;
            font-size: 1.1rem;
        }
        
        strong {
            color: var(--primary);
            font-weight: 600;
        }
        
        .card {
            background: white;
            border-radius: 12px;
            padding: 1.5rem;
            margin-bottom: 2rem;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
            border-left: 4px solid var(--primary);
        }
        
        .card-highlight {
            background: linear-gradient(to right, #f8f9fa, white);
            border-left: 4px solid var(--success);
        }
        
        ul, ol {
            margin-left: 1.5rem;
            margin-bottom: 1.5rem;
            list-style-type: none; 
            padding-left: 0;
        }
        
        li {
            margin-bottom: 0.5rem;
        }
        
        .grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 1.5rem;
            margin: 2rem 0;
        }
        
        .feature {
            background: white;
            padding: 1.5rem;
            border-radius: 12px;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
            transition: transform 0.3s ease;
        }
        
        .feature:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
        }
        
        .feature-icon {
            font-size: 2rem;
            margin-bottom: 1rem;
            color: var(--primary);
        }
        
        .highlight {
            background-color: rgba(108, 92, 231, 0.1);
            padding: 1.5rem;
            border-radius: 12px;
            margin: 2rem 0;
            border-left: 4px solid var(--primary);
        }
        
        .quote {
            font-style: italic;
            font-size: 1.2rem;
            color: var(--dark);
            padding: 1.5rem;
            background: rgba(255, 255, 255, 0.7);
            border-radius: 12px;
            margin: 2rem 0;
            position: relative;
        }
        
        .quote:before {
            content: '"';
            font-size: 4rem;
            color: rgba(108, 92, 231, 0.1);
            position: absolute;
            left: 1rem;
            top: 0.5rem;
        }
        
        .badge {
            display: inline-block;
            padding: 0.3rem 0.8rem;
            border-radius: 20px;
            font-size: 0.9rem;
            font-weight: 600;
            margin-right: 0.5rem;
            margin-bottom: 0.5rem;
        }
        
        .badge-primary {
            background-color: var(--primary);
            color: white;
        }
        
        .badge-secondary {
            background-color: var(--secondary);
            color: white;
        }
        
        .badge-success {
            background-color: var(--success);
            color: white;
        }
        
        .footer {
            text-align: center;
            margin-top: 3rem;
            padding: 2rem 0;
            color: var(--dark);
            font-size: 1.1rem;
        }
      
      .example-link {
            display: inline-block;
            padding: 12px 24px;
            font-size: 18px;
            font-weight: 600;
            text-decoration: none;
            background-color: #2a4d8c;
            color: white;
            border-radius: 8px;
            transition: all 0.3s ease;
            box-shadow: 0 4px 12px rgba(42, 77, 140, 0.25);
            border: 2px solid transparent;
            margin-top: 20px;
        }
        
        .example-link:hover {
            background-color: #1a3e7c;
            transform: translateY(-3px);
            box-shadow: 0 6px 16px rgba(42, 77, 140, 0.35);
        }
        
        .example-link:active {
            background-color: #153a6f;
            transform: translateY(0);
            box-shadow: 0 2px 8px rgba(42, 77, 140, 0.3);
        }
        
        .example-link:focus {
            outline: none;
            border-color: #4a8cff;
        }
        
        .description {
            color: #555;
            line-height: 1.6;
            margin-bottom: 30px;
        }
      .document-container {
            max-width: 800px;
            padding: 40px;
            background-color: white;
            border-radius: 12px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
            text-align: center;
        }
        
/* Стили для таблиц сравнения */
.competitors-table {
    width: 100%;
    border-collapse: collapse;
    margin: 2rem 0;
    font-size: 0.95rem;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    border-radius: 12px;
    overflow: hidden;
}

.competitors-table th {
    background-color: var(--primary);
    color: white;
    padding: 1rem;
    text-align: left;
    font-weight: 600;
}

.competitors-table td {
    padding: 1rem;
    border-bottom: 1px solid #eee;
    vertical-align: top;
}

.competitors-table tr:nth-child(even) {
    background-color: #f9f9f9;
}

.competitors-table tr:last-child td {
    border-bottom: none;
}

.competitors-table .icon {
    font-size: 1.2rem;
    margin-right: 0.5rem;
    vertical-align: middle;
}

.competitors-table .pros {
    color: var(--success);
    font-weight: 600;
}

.competitors-table .cons {
    color: var(--danger);
    font-weight: 600;
}

.differences-table {
    width: 100%;
    border-collapse: collapse;
    margin: 2rem 0;
    font-size: 0.95rem;
}

.differences-table td {
    padding: 1rem;
    border-bottom: 1px solid #eee;
}

.differences-table .feature {
    font-weight: 600;
    color: var(--primary);
}

.differences-table .checkmark {
    color: var(--success);
    font-weight: bold;
    text-align: center;
}

.conclusion-box {
    background-color: rgba(108, 92, 231, 0.1);
    padding: 1.5rem;
    border-radius: 12px;
    margin: 2rem 0;
    border-left: 4px solid var(--primary);
}
      
        @media (max-width: 768px) {
            h1 {
                font-size: 2.2rem;
            }
            
            h2 {
                font-size: 1.7rem;
            }
            
            .grid {
                grid-template-columns: 1fr;
            }
        }
      
      /* Навигационное меню */
.nav-container {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    padding: 1.5rem;
    border-radius: 12px;
    margin-bottom: 2rem;
    box-shadow: 0 5px 20px rgba(108, 92, 231, 0.2);
}

.nav-title {
    color: white;
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 1rem;
    text-align: center;
}

.nav-links {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.8rem;
}

.nav-link {
    display: inline-block;
    padding: 0.6rem 1.2rem;
    background-color: rgba(255, 255, 255, 0.15);
    color: white;
    text-decoration: none;
    border-radius: 8px;
    font-weight: 500;
    transition: all 0.3s ease;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.nav-link:hover {
    background-color: rgba(255, 255, 255, 0.25);
    transform: translateY(-2px);
}

.nav-link:active {
    transform: translateY(0);
}
      .nav-examples-link {
    display: inline-block;
    padding: 0.6rem 1.2rem;
    background-color: var(--success);
    color: white;
    text-decoration: none;
    border-radius: 8px;
    font-weight: 500;
    transition: all 0.3s ease;
    border: 1px solid rgba(255, 255, 255, 0.3);
    box-shadow: 0 2px 8px rgba(0, 184, 148, 0.3);
}

.nav-examples-link:hover {
    background-color: #00a884;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 184, 148, 0.4);
}

.nav-examples-link:active {
    transform: translateY(0);
}

@media (max-width: 768px) {
    .nav-links {
        flex-direction: column;
        align-items: center;
        gap: 0.6rem;
    }
    
    .nav-link {
        width: 100%;
        text-align: center;
    }
}
      
      /* Плавающая кнопка "Наверх" */
.back-to-nav {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: var(--primary);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    box-shadow: 0 4px 12px rgba(108, 92, 231, 0.3);
    transition: all 0.3s ease;
    z-index: 100;
    opacity: 0;
    transform: translateY(20px);
    visibility: hidden;
}

.back-to-nav.visible {
    opacity: 1;
    transform: translateY(0);
    visibility: visible;
}

.back-to-nav:hover {
    background: var(--secondary);
    transform: translateY(-3px) scale(1.1);
    box-shadow: 0 6px 16px rgba(0, 206, 255, 0.4);
}

.back-to-nav:active {
    transform: translateY(0) scale(0.95);
}

@media (max-width: 768px) {
    .back-to-nav {
        bottom: 20px;
        right: 20px;
        width: 45px;
        height: 45px;
    }
}

/* Стили для форм */
.abstract-form {
    background: white;
    border-radius: 12px;
    padding: 2rem;
    margin: 2rem 0;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    border-left: 4px solid var(--primary);
    max-width: 600px;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--dark);
    font-size: 1rem;
}

.form-input,
.form-textarea {
    width: 100%;
    padding: 0.8rem 1rem;
    border: 2px solid #e0e0e0;
    border-radius: 8px;
    font-size: 1rem;
    transition: all 0.3s ease;
    background-color: var(--light);
}

.form-input:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--primary);
    background-color: white;
    box-shadow: 0 0 0 3px rgba(108, 92, 231, 0.1);
}

.form-textarea {
    min-height: 120px;
    resize: vertical;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

.form-submit {
    display: inline-block;
    padding: 12px 32px;
    font-size: 1.1rem;
    font-weight: 600;
    text-decoration: none;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: white;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 12px rgba(108, 92, 231, 0.25);
    width: 100%;
}

.form-submit:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(108, 92, 231, 0.35);
}