* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        
        body {
            background: linear-gradient(135deg, #1a2a6c, #b21f1f, #1a2a6c);
            color: #fff;
            min-height: 100vh;
            padding: 20px;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
        }
        
        .container {
            max-width: 900px;
            width: 100%;
            background: rgba(0, 0, 0, 0.8);
            border-radius: 20px;
            padding: 30px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
            position: relative;
            overflow: hidden;
        }
        
        header {
            text-align: center;
            margin-bottom: 30px;
        }
        
        h1 {
            font-size: 2.5rem;
            margin-bottom: 10px;
            background: linear-gradient(to right, #ff8a00, #da1b60);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            text-shadow: 0 2px 4px rgba(0,0,0,0.3);
        }
        
        .subtitle {
            font-size: 1.1rem;
            color: #aaa;
            max-width: 600px;
            margin: 0 auto;
            line-height: 1.6;
        }
        
        .content-section {
            display: flex;
            flex-direction: column;
            gap: 25px;
        }
        
        .card {
            background: rgba(30, 30, 50, 0.7);
            border-radius: 15px;
            padding: 25px;
            transition: transform 0.3s, box-shadow 0.3s;
            cursor: pointer;
            border: 2px solid transparent;
        }
        
        .card:hover {
            transform: translateY(-5px);
            box-shadow: 0 8px 20px rgba(0, 0, 0, 0.4);
            border-color: #4a7bff;
        }
        
        .card-header {
            display: flex;
            align-items: center;
            gap: 15px;
            margin-bottom: 15px;
        }
        
        .icon {
            width: 50px;
            height: 50px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
        }
        
        .html .icon { background: #e34f26; }
        .css .icon { background: #264de4; }
        .js .icon { background: #f0db4f; color: #333; }
        .php .icon { background: #777bb3; }
        .laravel .icon { background: #ff2d20; }
        
        .card h3 {
            font-size: 1.6rem;
            margin-bottom: 5px;
        }
        
        .card p {
            color: #ccc;
            line-height: 1.6;
        }
        
        .progress-bar {
            height: 8px;
            background: rgba(255, 255, 255, 0.1);
            border-radius: 4px;
            margin: 15px 0;
            overflow: hidden;
        }
        
        .progress {
            height: 100%;
            border-radius: 4px;
            transition: width 0.5s;
        }
        
        .html .progress { background: #e34f26; width: 75%; }
        .css .progress { background: #264de4; width: 70%; }
        .js .progress { background: #f0db4f; width: 65%; }
        .php .progress { background: #777bb3; width: 60%; }
        .laravel .progress { background: #ff2d20; width: 55%; }
        
        .stats {
            display: flex;
            justify-content: space-between;
            color: #aaa;
            font-size: 0.9rem;
        }
        
        .question-container {
            display: none;
            padding: 20px;
        }
        
        .question-header {
            display: flex;
            justify-content: space-between;
            margin-bottom: 20px;
            align-items: center;
        }
        
        .question-count {
            font-size: 1.1rem;
            background: rgba(255, 255, 255, 0.1);
            padding: 8px 15px;
            border-radius: 20px;
        }
        
        .timer {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 1.2rem;
            color: #ff6b6b;
        }
        
        .question-text {
            font-size: 1.4rem;
            margin: 20px 0;
            line-height: 1.5;
        }
        
        .options {
            display: grid;
            grid-template-columns: 1fr;
            gap: 15px;
            margin: 30px 0;
        }
        
        .option {
            background: rgba(255, 255, 255, 0.1);
            padding: 15px 20px;
            border-radius: 10px;
            cursor: pointer;
            transition: all 0.2s;
            display: flex;
            align-items: center;
            gap: 15px;
        }
        
        .option:hover {
            background: rgba(74, 123, 255, 0.3);
        }
        
        .option.selected {
            background: rgba(74, 123, 255, 0.5);
            border: 2px solid #4a7bff;
        }
        
        .option-letter {
            width: 35px;
            height: 35px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            background: rgba(255, 255, 255, 0.2);
            font-weight: bold;
        }
        
        .controls {
            display: flex;
            justify-content: space-between;
            margin-top: 20px;
        }
        
        button {
            background: linear-gradient(to right, #4a7bff, #6a11cb);
            color: white;
            border: none;
            padding: 12px 30px;
            border-radius: 30px;
            font-size: 1rem;
            cursor: pointer;
            transition: all 0.3s;
            font-weight: bold;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        
        button:hover {
            transform: translateY(-3px);
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
        }
        
        button:disabled {
            background: #555;
            cursor: not-allowed;
            transform: none;
            box-shadow: none;
        }
        
        .results {
            display: none;
            text-align: center;
            padding: 30px;
        }
        
        .score-circle {
            width: 200px;
            height: 200px;
            border-radius: 50%;
            background: conic-gradient(#4a7bff 0% 70%, #ff6b6b 70% 100%);
            margin: 30px auto;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 3rem;
            font-weight: bold;
            position: relative;
        }
        
        .score-text {
            position: absolute;
            font-size: 1.2rem;
            bottom: -40px;
        }
        
        .result-text {
            font-size: 1.8rem;
            margin: 20px 0;
        }
        
        .details {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 15px;
            margin: 30px 0;
        }
        
        .detail-card {
            background: rgba(255, 255, 255, 0.1);
            padding: 20px;
            border-radius: 15px;
            text-align: left;
        }
        
        .detail-card h4 {
            margin-bottom: 10px;
            color: #4a7bff;
        }
        
        .restart-btn {
            margin: 20px auto;
            padding: 15px 40px;
            font-size: 1.2rem;
        }
        
        .topic-indicator {
            font-size: 1.2rem;
            margin-bottom: 20px;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 10px;
        }
        
        .decoration {
            position: absolute;
            opacity: 0.05;
            font-size: 15rem;
            z-index: -1;
        }
        
        .html-decor { top: -30px; left: -30px; color: #e34f26; }
        .css-decor { bottom: -30px; right: -30px; color: #264de4; }
        
        @media (max-width: 768px) {
            .container {
                padding: 20px;
            }
            
            .details {
                grid-template-columns: 1fr;
            }
            
            .question-text {
                font-size: 1.2rem;
            }
            
            .decoration {
                font-size: 10rem;
            }
        }