:root {
            --tg-theme-bg-color: #ffffff;
            --tg-theme-text-color: #000000;
            --tg-theme-hint-color: #707579;
            --tg-theme-link-color: #3390ec;
            --tg-theme-button-color: #3390ec;
            --tg-theme-button-text-color: #ffffff;
            --tg-theme-secondary-bg-color: #f4f4f5;
            --tg-theme-accent-color: #5288c1;
            --card-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
            --card-border-radius: 16px;
            --button-radius: 10px;
        }

        /* For dark mode support - lighter dark theme */
        @media (prefers-color-scheme: dark) {
            :root {
                --tg-theme-bg-color: #2c2c34;
                --tg-theme-text-color: #ffffff;
                --tg-theme-hint-color: #b8b8c0;
                --tg-theme-link-color: #8cc5fe;
                --tg-theme-button-color: #3390ec;
                --tg-theme-button-text-color: #ffffff;
                --tg-theme-secondary-bg-color: #383846;
                --card-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
            }
        }

        body {
            background-color: var(--tg-theme-bg-color);
            color: var(--tg-theme-text-color);
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
            margin: 0;
            padding: 0;
            min-height: 100vh;
        }

        header {
            background-color: var(--tg-theme-bg-color);
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        }

        .course-card {
            background-color: var(--tg-theme-secondary-bg-color);
            border-radius: var(--card-border-radius);
            box-shadow: var(--card-shadow);
            transition: all 0.3s ease;
            overflow: hidden;
            height: 100%;
            display: flex;
            flex-direction: column;
        }

        .course-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 8px 25px rgba(0, 0, 0, 0.12);
        }

        .course-image {
            height: 180px;
            overflow: hidden;
            position: relative;
            background: linear-gradient(135deg, var(--tg-theme-button-color), #5e5ce6);
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .course-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }

        /* Ensure images fully fill the space */
        .python-bg {
            background: linear-gradient(135deg, #42A5F5, #2196F3);
        }

        .flask-bg {
            background: linear-gradient(135deg, #9C27B0, #673AB7);
        }

        .unity-bg {
            background: linear-gradient(135deg, #FF9800, #FF5722);
        }

        .javascript-bg {
            background: linear-gradient(135deg, #FDD835, #FFB300);
        }

        .react-bg {
            background: linear-gradient(135deg, #00BCD4, #03A9F4);
        }

        .course-image img {
            object-fit: contain;
            max-width: 60%;
            max-height: 60%;
            filter: drop-shadow(0 4px 6px rgba(0, 0, 0, 0.2));
        }

        .course-card:hover .course-image img {
            transform: scale(1.05);
        }

        .course-level {
            position: absolute;
            top: 12px;
            left: 12px;
            padding: 4px 10px;
            border-radius: 20px;
            font-size: 12px;
            font-weight: 600;
            background-color: rgba(255, 255, 255, 0.9);
            color: var(--tg-theme-accent-color);
            z-index: 1;
        }

        .course-duration {
            display: inline-flex;
            align-items: center;
            font-size: 13px;
            color: var(--tg-theme-hint-color);
        }

        .course-duration i {
            margin-right: 4px;
            font-size: 16px;
        }

        .course-price {
            font-weight: 600;
            color: var(--tg-theme-accent-color);
        }

        .tg-button {
            background-color: var(--tg-theme-button-color);
            color: var(--tg-theme-button-text-color);
            border: none;
            border-radius: var(--button-radius);
            padding: 12px 16px;
            font-weight: 500;
            cursor: pointer;
            transition: all 0.2s;
            text-align: center;
            display: block;
            width: 100%;
        }

        .tg-button:hover {
            opacity: 0.9;
        }

        .tg-button:active {
            transform: scale(0.98);
        }

        .tg-button-outline {
            background-color: transparent;
            color: var(--tg-theme-button-color);
            border: 1.5px solid var(--tg-theme-button-color);
        }

        .unavailable-badge {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-color: rgba(0, 0, 0, 0.6);
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-weight: 600;
            z-index: 2;
        }

        .coming-soon {
            background-color: rgba(0, 0, 0, 0.4);
            backdrop-filter: blur(3px);
            padding: 8px 16px;
            border-radius: 8px;
            font-size: 14px;
            letter-spacing: 1px;
            text-transform: uppercase;
        }

        /* Animations */
        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(10px); }
            to { opacity: 1; transform: translateY(0); }
        }

        .fade-in {
            animation: fadeIn 0.6s ease forwards;
            opacity: 0;
        }

        .delay-1 { animation-delay: 0.1s; }
        .delay-2 { animation-delay: 0.2s; }
        .delay-3 { animation-delay: 0.3s; }
        .delay-4 { animation-delay: 0.4s; }
        .delay-5 { animation-delay: 0.5s; }

        /* For PDF export optimization */
        @media print {
            .course-card {
                break-inside: avoid;
                page-break-inside: avoid;
            }
        }
        @media (prefers-color-scheme: dark) {
    /* Общие правила для текста */
    .text-gray-600,
    .text-gray-700,
    .text-gray-800,
    .text-black {
        color: #f3f4f6 !important; /* светлый текст для темной темы */
    }

    /* Неяркий текст */
    .text-gray-500,
    .text-gray-400 {
        color: #d1d5db !important;
    }

    /* Фон для карточек */
    .bg-white {
        background-color: var(--tg-theme-secondary-bg-color) !important;
    }

    /* Цвета инициалов в отзывах */
    .text-blue-700 {
        color: #93c5fd !important;
    }

    .text-green-700 {
        color: #86efac !important;
    }

    .bg-blue-100 {
        background-color: rgba(59, 130, 246, 0.3) !important;
    }

    .bg-green-100 {
        background-color: rgba(34, 197, 94, 0.3) !important;
    }

    /* Фон для блоков тем */
    .bg-gray-50 {
        background-color: rgba(255, 255, 255, 0.05) !important;
    }

    /* Рамки в темной теме */
    .border-gray-200 {
        border-color: rgba(255, 255, 255, 0.1) !important;
    }

    /* Цвет для голубых информационных блоков */
    .bg-blue-50 {
        background-color: rgba(59, 130, 246, 0.15) !important;
    }

    /* Цвет для списков в информационных блоках */
    .text-gray-700 {
        color: #e5e7eb !important;
    }
}

/* Фиксация общих стилей независимо от темы */
.border-l-4.border-blue-500 h3 {
    color: var(--tg-theme-text-color) !important;
}

.border-l-4.border-blue-500 p {
    color: var(--tg-theme-hint-color) !important;
}

/* Обеспечение читаемости текста отзывов */
.bg-gray-50 p,
.bg-gray-700 p {
    color: inherit !important;
}