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

        :root {
            --green: #087f5b;
            --green-dark: #045c43;
            --green-light: #e7f8f1;
            --blue: #0877b9;
            --blue-light: #e8f5ff;
            --text: #16352d;
            --muted: #657a73;
            --white: #ffffff;
            --border: #dcece6;
            --shadow: 0 18px 50px rgba(8, 75, 58, .10);
            --radius: 20px;
            --correct: #0a8f5a;
            --wrong: #d9534f;
            --card-bg: rgba(255, 255, 255, .92);
        }

        body {
            font-family: "Noto Sans Devanagari", sans-serif;
            background: radial-gradient(circle at 0% 0%, rgba(8, 127, 91, .08), transparent 30%),
                        radial-gradient(circle at 100% 20%, rgba(8, 119, 185, .07), transparent 25%),
                        #f5faf8;
            color: var(--text);
            min-height: 100vh;
            padding: 20px;
        }

        .quiz-container {
            max-width: 1200px;
            margin: 1rem auto;
            background: rgba(255, 255, 255, .85);
            backdrop-filter: blur(12px);
            border-radius: 32px;
            box-shadow: var(--shadow);
            padding: 30px 28px 40px;
            border: 1px solid var(--border);
        }

        /* ---- HEADER ---- */
        .quiz-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 16px;
            margin-bottom: 25px;
            padding-bottom: 18px;
            border-bottom: 2px solid var(--border);
        }

        .quiz-title {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .quiz-title h1 {
            font-size: 1.7rem;
            font-weight: 800;
            color: var(--green-dark);
            letter-spacing: -0.5px;
        }

        .quiz-title i {
            font-size: 2rem;
            color: var(--green);
        }

        .quiz-stats {
            display: flex;
            align-items: center;
            gap: 20px;
            flex-wrap: wrap;
        }

        .stat-badge {
            display: flex;
            align-items: center;
            gap: 6px;
            padding: 6px 16px;
            border-radius: 30px;
            background: var(--green-light);
            color: var(--green-dark);
            font-weight: 600;
            font-size: .9rem;
        }

        .stat-badge i {
            font-size: 1rem;
        }

        .stat-badge.attempted {
            background: #fff3e0;
            color: #b45f06;
        }

        .stat-badge.correct-count {
            background: #e0f7e9;
            color: var(--correct);
        }

        .stat-badge.wrong-count {
            background: #fce4e4;
            color: var(--wrong);
        }

        /* ---- PROGRESS BAR ---- */
        .progress-wrap {
            margin-bottom: 28px;
        }

        .progress-bar-bg {
            width: 100%;
            height: 8px;
            background: #e9f0ec;
            border-radius: 20px;
            overflow: hidden;
            position: relative;
        }

        .progress-fill {
            height: 100%;
            width: 0%;
            background: linear-gradient(90deg, var(--green), var(--blue));
            border-radius: 20px;
            transition: width .4s ease;
        }

        .progress-text {
            display: flex;
            justify-content: space-between;
            font-size: .82rem;
            color: var(--muted);
            margin-top: 5px;
        }

        /* ---- QUESTION CARD ---- */
        .question-card {
            background: var(--card-bg);
            border-radius: var(--radius);
            padding: 22px 24px 24px;
            margin-bottom: 20px;
            border: 1px solid var(--border);
            box-shadow: 0 4px 14px rgba(0, 0, 0, .02);
            transition: border-color .3s;
        }

        .question-card.correct-highlight {
            border-color: var(--correct);
            background: #f2fcf7;
        }

        .question-card.wrong-highlight {
            border-color: var(--wrong);
            background: #fdf2f2;
        }

        .q-header {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            margin-bottom: 12px;
        }

        .q-number {
            min-width: 36px;
            height: 36px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--green), var(--blue));
            color: #fff;
            font-weight: 700;
            font-size: .9rem;
            flex-shrink: 0;
        }

        .q-text {
            font-size: 1.05rem;
            font-weight: 600;
            line-height: 1.6;
            padding-top: 4px;
        }

        .q-status {
            margin-left: auto;
            font-size: 1.2rem;
            flex-shrink: 0;
        }

        .q-status.correct i {
            color: var(--correct);
        }
        .q-status.wrong i {
            color: var(--wrong);
        }
        .q-status.unattempted i {
            color: #b0c4b8;
        }

        /* ---- OPTIONS ---- */
        .options-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 8px 16px;
            margin-top: 6px;
        }

        .option-item {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 10px 16px;
            border-radius: 12px;
            background: #f9fcfb;
            border: 1.5px solid #e3efe8;
            cursor: pointer;
            transition: all .2s ease;
            font-size: .95rem;
        }

        .option-item:hover:not(.disabled) {
            background: #eaf5ef;
            border-color: var(--green);
            transform: translateX(3px);
        }

        .option-item.selected {
            border-color: var(--blue);
            background: var(--blue-light);
        }

        .option-item.correct-answer {
            border-color: var(--correct);
            background: #d4f0e3;
        }

        .option-item.wrong-answer {
            border-color: var(--wrong);
            background: #fce4e4;
        }

        .option-item.disabled {
            cursor: default;
            opacity: .9;
        }

        .option-item input[type="radio"] {
            accent-color: var(--green);
            width: 16px;
            height: 16px;
            flex-shrink: 0;
            cursor: pointer;
        }

        .option-item.disabled input[type="radio"] {
            cursor: default;
        }

        .option-label {
            flex: 1;
        }

        /* ---- EXPLANATION ---- */
        .explanation-box {
            margin-top: 14px;
            padding: 14px 18px;
            border-radius: 14px;
            background: #f2f8f5;
            border-left: 4px solid var(--blue);
            display: none;
            font-size: .92rem;
            color: #2a4a40;
            line-height: 1.7;
        }

        .explanation-box.show {
            display: block;
        }

        .explanation-box i {
            color: var(--blue);
            margin-right: 6px;
        }

        .explanation-box strong {
            color: var(--green-dark);
        }

        /* ---- FOOTER ACTIONS ---- */
        .quiz-actions {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 14px;
            margin-top: 28px;
            padding-top: 20px;
            border-top: 2px solid var(--border);
        }

        .btn-group {
            display: flex;
            gap: 10px;
            flex-wrap: wrap;
        }

        .btn {
            padding: 10px 22px;
            border-radius: 30px;
            border: none;
            font-weight: 700;
            font-size: .9rem;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            cursor: pointer;
            transition: all .25s ease;
            background: var(--white);
            color: var(--text);
            border: 1.5px solid var(--border);
            font-family: inherit;
        }

        .btn-primary {
            background: linear-gradient(135deg, var(--green), var(--blue));
            color: #fff;
            border: none;
            box-shadow: 0 4px 14px rgba(8, 127, 91, .25);
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(8, 127, 91, .30);
        }

        .btn-primary:disabled {
            opacity: .5;
            cursor: not-allowed;
            transform: none;
        }

        .btn-success {
            background: var(--correct);
            color: #fff;
            border: none;
        }

        .btn-danger {
            background: var(--wrong);
            color: #fff;
            border: none;
        }

        .btn-outline {
            background: transparent;
            border: 1.5px solid var(--border);
        }

        .btn-outline:hover {
            border-color: var(--green);
            background: var(--green-light);
        }

        /* ---- RESULT SUMMARY ---- */
        .result-summary {
            display: none;
            grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
            gap: 14px;
            margin-top: 18px;
            padding: 18px 20px;
            border-radius: 18px;
            background: linear-gradient(135deg, #f2faf7, #e8f5ff);
            border: 1px solid var(--border);
        }

        .result-summary.show {
            display: grid;
        }

        .result-item {
            text-align: center;
        }

        .result-item .number {
            font-size: 2rem;
            font-weight: 800;
            color: var(--green-dark);
        }

        .result-item .label {
            font-size: .78rem;
            color: var(--muted);
        }

        .result-item .number.correct-num {
            color: var(--correct);
        }
        .result-item .number.wrong-num {
            color: var(--wrong);
        }
        .result-item .number.attempt-num {
            color: var(--blue);
        }

        /* ---- RESPONSIVE ---- */
        @media (max-width: 768px) {
            .options-grid {
                grid-template-columns: 1fr;
            }
            .quiz-container {
                padding: 18px 14px 28px;
            }
            .quiz-title h1 {
                font-size: 1.3rem;
            }
            .quiz-header {
                flex-direction: column;
                align-items: stretch;
            }
            .quiz-stats {
                justify-content: space-between;
            }
            .q-text {
                font-size: .95rem;
            }
            .option-item {
                font-size: .88rem;
                padding: 8px 12px;
            }
            .btn {
                padding: 8px 16px;
                font-size: .82rem;
            }
            .quiz-actions {
                flex-direction: column;
                align-items: stretch;
            }
            .btn-group {
                justify-content: center;
            }
        }

        @media (max-width: 480px) {
            .quiz-stats {
                flex-wrap: wrap;
                gap: 6px;
            }
            .stat-badge {
                font-size: .75rem;
                padding: 4px 12px;
            }
            .q-number {
                min-width: 30px;
                height: 30px;
                font-size: .75rem;
            }
        }