* {
            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;
            padding: 20px;
        }

        .container {
            max-width: 900px;
            margin: 0 auto;
            background: white;
            border-radius: 15px;
            box-shadow: 0 10px 30px rgba(0,0,0,0.3);
            padding: 30px;
        }

        h1 {
            color: #667eea;
            margin-bottom: 10px;
            font-size: 2em;
        }

        .subtitle {
            color: #666;
            margin-bottom: 30px;
        }

        .tabs {
            display: flex;
            gap: 10px;
            margin-bottom: 30px;
            border-bottom: 2px solid #eee;
        }

        .tab {
            padding: 12px 24px;
            background: none;
            border: none;
            cursor: pointer;
            font-size: 16px;
            color: #666;
            border-bottom: 3px solid transparent;
            transition: all 0.3s;
        }

        .tab.active {
            color: #667eea;
            border-bottom-color: #667eea;
            font-weight: 600;
        }

        .tab-content {
            display: none;
        }

        .tab-content.active {
            display: block;
        }

        .form-group {
            margin-bottom: 20px;
        }

        label {
            display: block;
            margin-bottom: 8px;
            color: #333;
            font-weight: 500;
        }

        input[type="text"],
        textarea,
        select {
            width: 100%;
            padding: 12px;
            border: 2px solid #e0e0e0;
            border-radius: 8px;
            font-size: 14px;
            transition: border-color 0.3s;
        }

        input[type="text"]:focus,
        textarea:focus,
        select:focus {
            outline: none;
            border-color: #667eea;
        }

        textarea {
            resize: vertical;
            min-height: 80px;
        }

        .btn {
            padding: 12px 24px;
            border: none;
            border-radius: 8px;
            cursor: pointer;
            font-size: 14px;
            font-weight: 600;
            transition: all 0.3s;
        }

        .btn-primary {
            background: #667eea;
            color: white;
        }

        .btn-primary:hover {
            background: #5568d3;
            transform: translateY(-2px);
        }

        .btn-secondary {
            background: #f0f0f0;
            color: #333;
            margin-left: 10px;
        }

        .btn-secondary:hover {
            background: #e0e0e0;
        }

        .btn-danger {
            background: #ff4757;
            color: white;
        }

        .btn-danger:hover {
            background: #e84147;
        }

        .question-item {
            background: #f8f9fa;
            padding: 20px;
            border-radius: 8px;
            margin-bottom: 15px;
            border-left: 4px solid #667eea;
        }

        .question-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 10px;
        }

        .question-type-badge {
            display: inline-block;
            padding: 4px 12px;
            background: #667eea;
            color: white;
            border-radius: 20px;
            font-size: 12px;
            margin-left: 10px;
        }

        .option-input {
            display: flex;
            align-items: center;
            margin-bottom: 10px;
            gap: 10px;
        }

        .option-input input[type="text"] {
            flex: 1;
        }

        .btn-remove-option {
            background: #ff4757;
            color: white;
            border: none;
            width: 30px;
            height: 30px;
            border-radius: 50%;
            cursor: pointer;
            font-size: 16px;
            transition: all 0.3s;
        }

        .btn-remove-option:hover {
            background: #e84147;
            transform: scale(1.1);
        }

        .quiz-card {
            background: #f8f9fa;
            padding: 20px;
            border-radius: 8px;
            margin-bottom: 15px;
            cursor: pointer;
            transition: all 0.3s;
            border: 2px solid transparent;
        }

        .quiz-card:hover {
            border-color: #667eea;
            transform: translateY(-2px);
        }

        .quiz-card h3 {
            color: #333;
            margin-bottom: 5px;
        }

        .quiz-info {
            color: #666;
            font-size: 14px;
        }

        .question-container {
            background: #f8f9fa;
            padding: 25px;
            border-radius: 8px;
            margin-bottom: 20px;
        }

        .question-text {
            font-size: 18px;
            font-weight: 600;
            color: #333;
            margin-bottom: 20px;
        }

        .answer-option {
            display: flex;
            align-items: center;
            padding: 12px;
            background: white;
            border-radius: 8px;
            margin-bottom: 10px;
            cursor: pointer;
            transition: all 0.3s;
            border: 2px solid #e0e0e0;
        }

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

        .answer-option input[type="radio"],
        .answer-option input[type="checkbox"] {
            margin-right: 12px;
            width: 20px;
            height: 20px;
            cursor: pointer;
        }

        .subjective-answer {
            width: 100%;
            min-height: 100px;
            padding: 12px;
            border: 2px solid #e0e0e0;
            border-radius: 8px;
            font-size: 14px;
        }

        .score-display {
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: white;
            padding: 40px;
            border-radius: 12px;
            text-align: center;
            margin-top: 20px;
        }

        .score-display h2 {
            font-size: 3em;
            margin-bottom: 10px;
        }

        .score-display p {
            font-size: 1.2em;
        }

        .empty-state {
            text-align: center;
            padding: 60px 20px;
            color: #999;
        }

        .empty-state h3 {
            margin-bottom: 10px;
        }

        .question-nav {
            display: flex;
            justify-content: space-between;
            margin-top: 20px;
        }