:root {
            --primary-color: #3498db;
            --secondary-color: #2ecc71;
            --accent-color: #e74c3c;
            --background-color: #f4f6f7;
            --text-color: #2c3e50;
			--text-color-dark: #ffffff;
            --card-background: #ffffff;
			--card-background-dark: #2c3e50;
        }
        /* Сброс стилей */
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        /* Шапка страницы */
        body {
            font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            background-color: var(--background-color);
            color: var(--text-color);
            line-height: 1.6;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 20px;
        }
        .header {
            background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
            color: white;
            padding: 40px 0;
            text-align: center;
        }
        .header-title {
            font-size: 2.5rem;
            margin-bottom: 20px;
        }
        /* Карточки выбора тестов */
        .test-categories {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 20px;
            margin-top: 30px;
        }
        .test-card {
            background-color: var(--card-background);
            border-radius: 12px;
            padding: 25px;
            text-align: center;
            box-shadow: 0 10px 20px rgba(0,0,0,0.1);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }
		.dark-theme .test-card {
            background-color: var(--card-background-dark);
            border-radius: 12px;
            padding: 25px;
            text-align: center;
            box-shadow: 0 10px 20px rgba(0,0,0,0.1);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }
        .test-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0,0,0,0.15);
        }
        /* Иконки и заголовки карточек тестов */
        .test-card-icon {
            font-size: 3rem;
            color: var(--primary-color);
            margin-bottom: 15px;
        }
        .test-card-title {
			color: var(--primary-color);
            font-size: 1.2rem;
            font-weight: 600;
            margin-bottom: 10px;
        }
        .test-card-description {
            color: var(--text-color);
            opacity: 0.7;
        }
		.dark-theme .test-card-description {
            color: var(--text-color-dark);
            opacity: 0.7;
        }
        /* Раздел авторизации */
        .auth-section {
            display: flex;
            justify-content: center;
            margin-top: 30px;
        }

.topics-dropdown {
    margin: 20px 0;
}

.form-control {
    width: 100%;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 6px;
    font-size: 16px;
}
        /* Кнопки */
        .btn {
            display: inline-block;
            padding: 12px 25px;
            border: none;
            border-radius: 8px;
            cursor: pointer;
            transition: all 0.3s ease;
            text-decoration: none;
            font-weight: 600;
        }
        .btn-primary {
            background-color: var(--primary-color);
            color: white;
        }
        .btn-primary:hover {
            background-color: darken(var(--primary-color), 10%);
        }
        .btn-secondary {
            background-color: var(--secondary-color);
            color: white;
        }
.exam-categories {
        margin: 30px 0;
        text-align: center;
    }

    .exam-buttons {
        display: flex;
        justify-content: center;
        gap: 10px;
        flex-wrap: wrap;
    }

    .exam-btn {
        padding: 10px 20px;
        background-color: var(--primary-color);
        color: white;
        border: none;
        border-radius: 6px;
        cursor: pointer;
        transition: background-color 0.3s;
    }

    .exam-btn:hover {
        background-color: darken(var(--primary-color), 10%);
    }

    .topics-section {
        margin: 30px 0;
    }

    .topics-container {
        max-height: 400px;
        overflow-y: auto;
        border: 1px solid #ddd;
        border-radius: 8px;
    }

    .topics-list2 {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: 10px;
        padding: 15px;
    }

    .topic-item {
        background-color: var(--card-background);
		color: var(--primary-color);
        padding: 10px;
        border-radius: 6px;
        box-shadow: 0 2px 5px rgba(0,0,0,0.1);
        transition: transform 0.2s;
    }

    .topic-item:hover {
        transform: scale(1.05);
        box-shadow: 0 4px 5px rgba(0,0,0,0.15);
    }

        /* Модальные окна */

        @media (max-width: 768px) {
            .test-categories {
                grid-template-columns: 1fr;
            }
        }
		
        .profile-header {
            display: flex;
            align-items: center;
            background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
            color: white;
            padding: 20px;
            border-radius: 10px;
            margin-bottom: 20px;
        }

        .profile-avatar {
            width: 100px;
            height: 100px;
            border-radius: 50%;
            margin-right: 20px;
            object-fit: cover;
            border: 3px solid white;
        }

        .profile-stats {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 20px;
            margin-bottom: 30px;
        }

        .stat-card {
            background-color: var(--card-background);
            border-radius: 10px;
            padding: 20px;
            text-align: center;
            box-shadow: 0 5px 15px rgba(0,0,0,0.1);
        }

        .progress-section {
            margin-bottom: 30px;
        }

        .progress-item {
            margin-bottom: 15px;
        }

        .progress-bar {
            background-color: #e0e0e0;
            border-radius: 10px;
            height: 20px;
            overflow: hidden;
        }

        .progress-bar .progress {
            background-color: var(--primary-color);
            height: 100%;
            transition: width 0.5s ease;
        }