* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            min-height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 20px;
        }

        .container {
            background: white;
            border-radius: 20px;
            padding: 30px;
            box-shadow: 0 15px 35px rgba(0, 0, 0, 0.1);
            max-width: 800px;
            width: 100%;
            min-height: 500px;
        }

        .screen {
            display: none;
        }

        .screen.active {
            display: block;
        }

        h1 {
            text-align: center;
            color: #333;
            margin-bottom: 30px;
            font-size: 2.5em;
            background: linear-gradient(45deg, #667eea, #764ba2);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .form-group {
            margin-bottom: 25px;
        }

        label {
            display: block;
            margin-bottom: 8px;
            font-weight: 600;
            color: #555;
            font-size: 1.1em;
        }

        select, input[type="radio"] {
            margin-right: 10px;
        }

        select {
            width: 100%;
            padding: 12px;
            border: 2px solid #e1e5e9;
            border-radius: 10px;
            font-size: 1em;
            background: white;
            transition: border-color 0.3s;
        }

        select:focus {
            outline: none;
            border-color: #667eea;
        }

        .radio-group {
            display: flex;
            gap: 20px;
            flex-wrap: wrap;
        }

        .radio-option {
            display: flex;
            align-items: center;
            padding: 10px 15px;
            border: 2px solid #e1e5e9;
            border-radius: 10px;
            cursor: pointer;
            transition: all 0.3s;
        }

        .radio-option:hover {
            border-color: #667eea;
            background: #f8f9ff;
        }

        .radio-option.selected {
            border-color: #667eea;
            background: #f8f9ff;
        }

        .radio-option input[type="radio"]:checked + label {
            color: #667eea;
        }

        .btn {
            background: linear-gradient(45deg, #667eea, #764ba2);
            color: white;
            border: none;
            padding: 15px 30px;
            border-radius: 10px;
            font-size: 1.1em;
            cursor: pointer;
            transition: transform 0.3s;
            width: 100%;
            margin-top: 20px;
        }

        .btn:hover {
            transform: translateY(-2px);
        }

        .btn:disabled {
            opacity: 0.6;
            cursor: not-allowed;
            transform: none;
        }

        .quiz-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 30px;
            padding: 15px 20px;
            background: #f8f9ff;
            border-radius: 10px;
        }

        .timer {
            font-size: 1.5em;
            font-weight: bold;
            color: #667eea;
            min-width: 80px;
        }

        .timer.warning {
            color: #e74c3c;
            animation: pulse 1s infinite;
        }

        @keyframes pulse {
            0%, 100% { opacity: 1; }
            50% { opacity: 0.5; }
        }

        .progress {
            flex: 1;
            margin: 0 20px;
        }

        .progress-bar {
            width: 100%;
            height: 10px;
            background: #e1e5e9;
            border-radius: 5px;
            overflow: hidden;
        }

        .progress-fill {
            height: 100%;
            background: linear-gradient(45deg, #667eea, #764ba2);
            transition: width 0.3s;
        }

        .question-card {
            background: #f8f9ff;
            padding: 25px;
            border-radius: 15px;
            margin-bottom: 25px;
            border-left: 5px solid #667eea;
        }

        .question-text {
            font-size: 1.3em;
            color: #333;
            margin-bottom: 20px;
            line-height: 1.5;
        }

        .options {
            display: grid;
            gap: 15px;
        }

        .option {
            padding: 15px 20px;
            border: 2px solid #e1e5e9;
            border-radius: 10px;
            cursor: pointer;
            transition: all 0.3s;
            background: white;
            font-size: 1.1em;
        }

        .option:hover {
            border-color: #667eea;
            background: #f8f9ff;
        }

        .option.selected {
            border-color: #667eea;
            background: #667eea;
            color: white;
        }

        .option.correct {
            border-color: #27ae60;
            background: #27ae60;
            color: white;
        }

        .option.incorrect {
            border-color: #e74c3c;
            background: #e74c3c;
            color: white;
        }

        .results-card {
            text-align: center;
            padding: 30px;
            background: #f8f9ff;
            border-radius: 15px;
        }

        .score-display {
            font-size: 3em;
            font-weight: bold;
            color: #667eea;
            margin: 20px 0;
        }

        .score-breakdown {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 20px;
            margin: 30px 0;
        }

        .stat-card {
            background: white;
            padding: 20px;
            border-radius: 10px;
            border: 2px solid #e1e5e9;
        }

        .stat-number {
            font-size: 2em;
            font-weight: bold;
            color: #667eea;
        }

        .stat-label {
            color: #666;
            margin-top: 5px;
        }

        .loading {
            text-align: center;
            padding: 40px;
        }

        .spinner {
            width: 50px;
            height: 50px;
            border: 5px solid #e1e5e9;
            border-top: 5px solid #667eea;
            border-radius: 50%;
            animation: spin 1s linear infinite;
            margin: 20px auto;
        }

        @keyframes spin {
            0% { transform: rotate(0deg); }
            100% { transform: rotate(360deg); }
        }

        .error-message {
            background: #fee;
            color: #c33;
            padding: 15px;
            border-radius: 10px;
            margin: 20px 0;
            border-left: 5px solid #e74c3c;
        }

        @media (max-width: 768px) {
            .container {
                padding: 20px;
                margin: 10px;
            }

            .quiz-header {
                flex-direction: column;
                gap: 15px;
            }

            .radio-group {
                flex-direction: column;
            }

            .score-breakdown {
                grid-template-columns: 1fr;
            }
        }

        .sticky-ad {
            text-align: center;
            padding: 10px;
            background: #f0f0f0;
            margin: 10px 0;
            border-radius: 5px;
            font-size: 0.9em;
            color: #666;
        }
        #page-load-counter {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(67, 45, 127, 0.2);
    border-radius: 50px;
    padding: 12px 20px;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
    z-index: 100;
    font-weight: 600;
    color: #432D7F;
}