/* Дополнительные минимальные стили для стартовой страницы */
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        body {
            font-family: 'Roboto', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
            background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
            color: #333;
            line-height: 1.6;
            min-height: 100vh;
            padding: 20px;
        }

        .main-container {
            max-width: 800px;
            margin: 40px auto;
            padding: 40px;
            background-color: rgba(255, 255, 255, 0.95);
            border-radius: 20px;
            box-shadow: 0 15px 35px rgba(0, 0, 0, 0.1);
            text-align: center;
        }

        .logo {
            font-size: 3.5rem;
            margin-bottom: 20px;
            color: #2196F3;
        }

        h1 {
            font-size: 2.5rem;
            margin-bottom: 15px;
            color: #2c3e50;
            font-weight: 700;
        }

        .tagline {
            font-size: 1.3rem;
            color: #7f8c8d;
            margin-bottom: 30px;
            font-weight: 400;
        }

        .description {
            font-size: 1.1rem;
            margin-bottom: 40px;
            text-align: left;
            padding: 0 20px;
            color: #555;
        }

        .features {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 20px;
            margin-bottom: 40px;
        }

        .feature {
            flex: 1;
            min-width: 200px;
            background: #f8f9fa;
            padding: 25px 20px;
            border-radius: 12px;
            border-left: 5px solid #2196F3;
            text-align: left;
        }

        .feature h3 {
            color: #2c3e50;
            margin-bottom: 10px;
            font-size: 1.2rem;
        }

        .cta-buttons {
            display: flex;
            justify-content: center;
            gap: 20px;
            margin-bottom: 30px;
            flex-wrap: wrap;
        }

        .btn {
            padding: 15px 35px;
            font-size: 1.1rem;
            font-weight: 600;
            border-radius: 10px;
            text-decoration: none;
            transition: all 0.3s ease;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            min-width: 180px;
        }

        .btn-primary {
            background: #2196F3;
            color: white;
            box-shadow: 0 4px 15px rgba(33, 150, 243, 0.3);
        }

        .btn-primary:hover {
            background: #1976D2;
            transform: translateY(-3px);
            box-shadow: 0 6px 20px rgba(33, 150, 243, 0.4);
        }

        .btn-secondary {
            background: transparent;
            color: #2196F3;
            border: 2px solid #2196F3;
        }

        .btn-secondary:hover {
            background: rgba(33, 150, 243, 0.1);
            transform: translateY(-3px);
        }

        .footer {
            margin-top: 40px;
            padding-top: 20px;
            border-top: 1px solid #eee;
            color: #7f8c8d;
            font-size: 0.9rem;
        }

        .copyright {
            margin-top: 10px;
            font-size: 0.85rem;
        }

        /* Адаптивность */
        @media (max-width: 768px) {
            .main-container {
                padding: 25px;
                margin: 20px auto;
            }

            h1 {
                font-size: 2rem;
            }

            .tagline {
                font-size: 1.1rem;
            }

            .cta-buttons {
                flex-direction: column;
                align-items: center;
            }

            .btn {
                width: 100%;
                max-width: 300px;
            }
        }

        .max-width {
            width: 300px:
            height: auto;
        }

        /* Навигация */
        .toc {
            background: #fff;
            border-radius: 8px;
            padding: 25px;
            margin-bottom: 30px;
            box-shadow: 0 2px 10px rgba(0,0,0,0.1);
            border-left: 4px solid #4a6ee0;
        }

        .toc h2 {
            color: #2c3e50;
            margin-bottom: 15px;
        }

        .toc ul {
            list-style-type: none;
            padding-left: 10px;
        }

        .toc li {
            margin: 10px 0;
        }

        .toc a {
            text-decoration: none;
            color: #4a6ee0;
            display: flex;
            align-items: center;
        }

        .toc a:hover {
            color: #2c3e50;
            text-decoration: underline;
        }

        /* Основной контент */
        .guide-content {
            background: #fff;
            border-radius: 8px;
            padding: 30px;
            box-shadow: 0 2px 15px rgba(0,0,0,0.1);
        }

        .guide-header {
            text-align: center;
            margin-bottom: 40px;
            padding-bottom: 20px;
            border-bottom: 2px solid #eee;
            margin-top: 40px;
            padding-top: 20px;
            border-top: 2px solid #eee;
        }

        .guide-header h1 {
            color: #2c3e50;
            font-size: 2.5em;
            margin-bottom: 10px;
        }

        .chapter {
            margin: 40px 0;
            scroll-margin-top: 20px;
        }

        .chapter h2 {
            color: #4a6ee0;
            border-bottom: 2px solid #eaeaea;
            padding-bottom: 10px;
            margin-bottom: 25px;
            font-size: 1.8em;
        }

        .step {
            margin: 25px 0;
            padding: 20px;
            background: #f8fafc;
            border-radius: 6px;
            border-left: 3px solid #4a6ee0;
            text-align: left;
        }

        .step h3 {
            color: #2c3e50;
            margin-bottom: 15px;
            display: flex;
            align-items: center;
        }

        .step li {
            text-align: left;
        }


        .step-number {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 28px;
            height: 28px;
            background: #4a6ee0;
            color: white;
            border-radius: 50%;
            margin-right: 10px;
            font-size: 0.9em;
        }

        /* Изображения */
        .image-container {
            margin: 20px 0;
            text-align: center;
        }

        .guide-image {
            max-width: 100%;
            height: auto;
            border-radius: 6px;
            box-shadow: 0 3px 15px rgba(0,0,0,0.1);
            border: 1px solid #ddd;
            transition: transform 0.3s ease;
            text-align: center;
        }

        .guide-image:hover {
            transform: scale(1.01);
        }

        .image-caption {
            font-style: italic;
            color: #666;
            margin-top: 10px;
            font-size: 0.9em;
            text-align: center;
        }

        .image-comparison {
            display: flex;
            flex-wrap: wrap;
            gap: 20px;
            margin: 25px 0;
            text-align: center;
        }

        .image-comparison div {
            flex: 1;
            min-width: 300px;
        }


        .image-25 {
            width: 25%;
            height-auto;
        }

        .image-30 {
            width: 30%;
            height-auto;
        }

        .image-50 {
            width: 50%;
            height-auto;
        }

        .image-75 {
            width: 75%;
            height-auto;
        }

        /* Подсказки и примечания */
        .tip {
            background: #e8f4fd;
            border-left: 4px solid #2196f3;
            padding: 15px;
            margin: 20px 0;
            border-radius: 0 6px 6px 0;
        }

        .warning {
            background: #fff3cd;
            border-left: 4px solid #ffc107;
            padding: 15px;
            margin: 20px 0;
            border-radius: 0 6px 6px 0;
            text-align: left;
        }

        /* Кнопки навигации */
        .nav-buttons {
            display: flex;
            justify-content: space-between;
            margin-top: 40px;
            padding-top: 20px;
            border-top: 1px solid #eee;
        }

        .nav-btn {
            display: inline-block;
            padding: 12px 25px;
            background: #4a6ee0;
            color: white;
            text-decoration: none;
            border-radius: 6px;
            font-weight: 500;
            transition: background 0.3s;
        }

        .nav-btn:hover {
            background: #3a5ed0;
        }

        .nav-btn.prev::before {
            content: "← ";
        }

        .nav-btn.next::after {
            content: " →";
        }

        /* Адаптивность */
        @media (max-width: 768px) {
            body {
                padding: 10px;
            }

            .guide-content {
                padding: 20px;
            }

            .guide-header h1 {
                font-size: 2em;
            }

            .image-comparison {
                flex-direction: column;
            }

            .nav-buttons {
                flex-direction: column;
                gap: 10px;
            }

            .nav-btn {
                text-align: center;
            }
        }

        .contact-item {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 12px;
            background: rgba(33, 150, 243, 0.05);
            border-radius: 8px;
            width: fit-content;
            text-align: center;
            margin: 10px auto;
        }

        .contact-icon {
            font-size: 20px;
        }

        .contact-info {
            flex: 1;
        }

        .contact-label {
            font-size: 12px;
            margin-bottom: 4px;
        }

        .contact-value {
            font-size: 14px !important;
            font-weight: 500 !important;
            max-width: 100% !important;
            display: block !important;
        }

        /* Дополнительные стили */
        code {
            background: #f1f3f4;
            padding: 2px 6px;
            border-radius: 4px;
            font-family: 'Courier New', monospace;
            font-size: 0.9em;
        }

        .keyboard-key {
            display: inline-block;
            padding: 2px 8px;
            background: #e9ecef;
            border: 1px solid #adb5bd;
            border-radius: 4px;
            font-family: monospace;
            box-shadow: 0 2px 0 #adb5bd;
            margin: 0 2px;
        }