body {
            background: linear-gradient(135deg, #1a0033, #330066);
            color: #e0e7ff;
            font-family: 'Poppins', sans-serif;
            overflow-x: hidden;
            position: relative;
        }
        .divider {
            height: 4px;
            border-radius: 2px;
            margin: 2rem 0;
            position: relative;
            overflow: hidden;
        }
        .divider.easy { background: #10b981; }
        .divider.medium { background: #3b82f6; }
        .divider.hard { background: #a855f7; }
        .divider::before {
            content: '';
            position: absolute;
            top: 0;
            left: -100%;
            width: 100%;
            height: 100%;
            background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.5), transparent);
            animation: shine 2s infinite;
        }
        @keyframes shine {
            0% { left: -100%; }
            50% { left: 100%; }
            100% { left: 100%; }
        }
        .question-card {
            background: rgba(30, 0, 51, 0.8);
            border: 2px solid #ff00cc;
            border-radius: 1rem;
            padding: 1.5rem;
            margin-bottom: 1.5rem;
            backdrop-filter: blur(8px);
            transition: all 0.3s ease;
        }
        .question-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 0 25px rgba(0, 204, 255, 0.8);
        }
        .option {
            padding: 0.5rem;
            border-radius: 0.5rem;
            transition: all 0.3s ease;
        }
        .option.correct {
            background: #10b981;
            color: #1a0033;
            font-weight: bold;
            box-shadow: 0 0 15px rgba(16, 185, 129, 0.8);
            animation: glow 1s ease;
        }
        .option.wrong {
            opacity: 0.3;
        }
        @keyframes glow {
            0% { box-shadow: 0 0 10px rgba(16, 185, 129, 0.8); }
            50% { box-shadow: 0 0 20px rgba(16, 185, 129, 1); }
            100% { box-shadow: 0 0 10px rgba(16, 185, 129, 0.8); }
        }
        .answer-text {
            cursor: pointer;
            color: #00ccff;
            font-weight: 600;
            transition: color 0.3s ease;
        }
        .answer-text:hover {
            color: #ff00cc;
        }
        .progress-container {
            margin-bottom: 3rem;
            padding: 2rem 0;
            text-align: center;
            transition: all 0.3s ease;
        }
        .progress-container.sticky {
            position: fixed;
            top: 80px;
            right: 20px;
            z-index: 10;
            margin-bottom: 0;
            padding: 1rem;
            background: rgba(30, 0, 51, 0.9);
            border-radius: 1rem;
            border: 2px solid #00ccff;
            box-shadow: 0 0 20px rgba(0, 204, 255, 0.5);
            transform: scale(0.8);
            transform-origin: top right;
        }
        .progress-ring {
            width: 120px;
            height: 120px;
            position: relative;
            margin: 0 auto;
        }
        .progress-ring circle {
            fill: none;
            stroke: #ff00cc;
            stroke-width: 10;
            stroke-linecap: round;
            transform: rotate(-90deg);
            transform-origin: 50% 50%;
        }
        .progress-ring .progress {
            stroke: #00ccff;
            transition: stroke-dashoffset 0.5s ease;
        }
        .progress-text {
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            font-family: 'Exo 2', sans-serif;
            font-size: 1.5rem;
            font-weight: bold;
            color: #00ccff;
            text-shadow: 0 0 5px rgba(0, 204, 255, 0.8);
            background: rgba(30, 0, 51, 0.8);
            border-radius: 50%;
            padding: 0.5rem;
        }
        .progress-label {
            font-family: 'Exo 2', sans-serif;
            font-size: 1.8rem;
            font-weight: bold;
            color: #00ccff;
            text-shadow: 0 0 10px rgba(0, 204, 255, 0.7);
            margin-bottom: 1.5rem;
        }
        .progress-container.sticky .progress-label {
            font-size: 1.2rem;
            margin-bottom: 0.5rem;
        }
        .nav-link {
            position: relative;
            font-family: 'Exo 2', sans-serif;
        }
        .nav-link::after {
            content: '';
            position: absolute;
            bottom: -3px;
            left: 0;
            width: 0;
            height: 3px;
            background: #00ccff;
            transition: width 0.4s ease;
        }
        .nav-link:hover::after {
            width: 100%;
        }
        .back-btn {
            background: linear-gradient(135deg, #ff00cc, #00ccff);
            color: white;
            border: none;
            padding: 0.5rem 1.5rem;
            border-radius: 2rem;
            font-family: 'Exo 2', sans-serif;
            font-weight: bold;
            cursor: pointer;
            transition: all 0.3s ease;
            box-shadow: 0 0 15px rgba(255, 0, 204, 0.5);
        }
        .back-btn:hover {
            transform: translateY(-3px);
            box-shadow: 0 0 25px rgba(0, 204, 255, 0.8);
        }
        .profile-photo {
            width: 140px;
            height: 140px;
            border-radius: 50%;
            border: 3px solid #00ccff;
            cursor: pointer;
            transition: all 0.3s ease;
            object-fit: cover;
            box-shadow: 0 0 20px rgba(0, 204, 255, 0.5);
        }
        .profile-photo:hover {
            transform: scale(1.05);
            box-shadow: 0 0 30px rgba(255, 0, 204, 0.7);
        }
        .profile-photo.enlarged {
            position: fixed;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%) scale(2);
            width: 200px;
            height: 200px;
            z-index: 1000;
            box-shadow: 0 0 50px rgba(0, 204, 255, 0.8);
            border: 4px solid #ff00cc;
        }
        .overlay {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0, 0, 0, 0.8);
            z-index: 999;
            display: none;
        }
        .cert-badge {
            display: inline-block;
            background: linear-gradient(135deg, #ff00cc, #00ccff);
            color: white;
            padding: 0.3rem 0.8rem;
            border-radius: 1rem;
            font-size: 0.8rem;
            margin: 0.2rem;
            font-weight: bold;
        }
        .social-icon {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            transition: all 0.3s ease;
            color: #00ccff;
        }
        .social-icon:hover {
            background: #00ccff;
            color: #1a0033;
            transform: translateY(-3px);
        }
        .particles {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            pointer-events: none;
            z-index: -1;
        }
        @media print {
            body {
                background: white;
                color: black;
            }
            .question-card {
                border: 1px solid black;
                background: white;
                backdrop-filter: none;
            }
            .divider {
                background: black;
            }
            .divider::before {
                display: none;
            }
            .option.correct {
                background: none;
                color: black;
                font-weight: bold;
            }
            .option.wrong {
                opacity: 1;
            }
            .particles, .progress-ring {
                display: none;
            }
            .progress-label, .progress-text {
                color: black;
                text-shadow: none;
                background: none;
            }
        }