* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
/* https://t.me/IELTSwithJurabek */
        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            background-color: #f9fafb;
            line-height: 1.5;
        }

        .loading-screen {
            min-height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
            background-color: #f9fafb;
        }

        .loading-content {
            text-align: center;
        }

        .spinner {
            width: 64px;
            height: 64px;
            border: 4px solid #d1d5db;
            border-top: 4px solid #111827;
            border-radius: 50%;
            animation: spin 1s linear infinite;
            margin: 0 auto 32px;
        }

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

            100% {
                transform: rotate(360deg);
            }
        }

        .loading-title {
            font-size: 1.25rem;
            font-weight: 600;
            color: #111827;
            margin-bottom: 8px;
        }

        .loading-subtitle {
            color: #6b7280;
        }

        .start-screen {
            min-height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
            background-color: #f9fafb;
        }

        .start-content {
            text-align: center;
        }

        .start-title {
            font-size: 1.5rem;
            font-weight: 600;
            color: #111827;
            margin-bottom: 24px;
        }

        .start-subtitle {
            color: #6b7280;
            margin-bottom: 24px;
        }

        .start-button {
            padding: 12px 32px;
            background-color: #2563eb;
            color: white;
            border: none;
            border-radius: 8px;
            font-size: 1rem;
            cursor: pointer;
            transition: background-color 0.2s;
        }

        .start-button:hover {
            background-color: #1d4ed8;
        }

        .test-interface {
            min-height: 100vh;
            background-color: white;
            display: flex;
            flex-direction: column;
            padding-bottom: 80px;
        }

        .header {
            background-color: white;
            border-bottom: 1px solid #e5e7eb;
            padding: 12px 16px;
            display: flex;
            align-items: center;
            justify-content: space-between;
        }

        .header-left {
            display: flex;
            align-items: center;
            gap: 16px;
        }

        .ielts-logo {
            color: #dc2626;
            font-weight: bold;
            font-size: 1.125rem;
        }

        .test-id {
            font-size: 0.875rem;
            color: #6b7280;
        }

        .support-link {
            display: flex;
            align-items: center;
            gap: 8px;
            color: #2563eb;
            text-decoration: none;
            font-size: 1rem;
            font-weight: 500;
            transition: color 0.2s;
        }

        .support-link:hover {
            color: #0844eb;
        }

        .header-right {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .icon {
            width: 20px;
            height: 20px;
            color: #6b7280;
        }

        .main-content {
            flex: 1;
            padding: 16px 24px;
            max-width: 1200px;
            margin: 0 auto;
            width: 100%;
        }

        .audio-controller-bar {
            position: sticky;
            top: 0;
            z-index: 190;
            display: flex;
            align-items: center;
            gap: 14px;
            padding: 12px 24px;
            border-bottom: 1px solid #dbe4f0;
            background: linear-gradient(180deg, rgba(248, 251, 255, 0.98) 0%, rgba(255, 255, 255, 0.98) 100%);
            backdrop-filter: blur(10px);
            box-shadow: 0 10px 26px rgba(15, 23, 42, 0.08);
        }

        .audio-controller-copy {
            flex: 0 0 auto;
            min-width: 140px;
        }

        .audio-controller-title {
            color: #0f172a;
            font-size: 0.95rem;
            font-weight: 800;
            line-height: 1.2;
        }

        .audio-controller-note {
            margin-top: 2px;
            color: #64748b;
            font-size: 0.82rem;
            line-height: 1.35;
        }

        .audio-controller-player {
            flex: 1 1 auto;
            width: 100%;
            min-width: 0;
        }

        .part-header {
            background-color: #f3f4f6;
            border-radius: 8px;
            padding: 16px;
            margin-bottom: 24px;
        }

        .part-title {
            font-size: 1.25rem;
            font-weight: 600;
            color: #111827;
            margin-bottom: 8px;
        }

        .part-instructions {
            color: #374151;
        }

        .questions-section {
            margin-bottom: 24px;
        }

        .questions-title {
            font-weight: 600;
            color: #111827;
            margin-bottom: 8px;
        }

        .questions-description {
            color: #374151;
            margin-bottom: 16px;
        }

        .scenario-title {
            font-weight: 500;
            color: #111827;
            margin-bottom: 24px;
        }

        .question-group {
            margin-bottom: 24px;
        }

        .question-item {
            display: flex;
            align-items: center;
            gap: 8px;
            margin-bottom: 12px;
            flex-wrap: wrap;
        }

        .question-input {
            width: 120px;
            height: 32px;
            text-align: center;
            border: 2px solid #3b82f6;
            border-radius: 4px;
            font-size: 0.875rem;
            outline: none;
            padding: 4px;
        }

        .question-input:focus {
            border-color: #1d4ed8;
            box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
        }

        .question-input.correct {
            border-color: #10b981;
            background-color: #d1fae5;
        }

        .question-input.incorrect {
            border-color: #ef4444;
            background-color: #fee2e2;
        }

        .question-input.partial {
            border-color: #f59e0b;
            background-color: #fef3c7;
        }

        .multiple-choice {
            margin-left: 20px;
        }

        .choice-item {
            margin-bottom: 8px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .choice-input {
            margin-right: 8px;
        }

        .choice-item.correct {
            background-color: #d1fae5;
            padding: 4px;
            border-radius: 4px;
        }

        .choice-item.incorrect {
            background-color: #fee2e2;
            padding: 4px;
            border-radius: 4px;
        }

        .matching-section {
            background-color: #f9fafb;
            border: 1px solid #e5e7eb;
            border-radius: 8px;
            padding: 16px;
            margin-bottom: 20px;
        }

        .matching-title {
            font-weight: 600;
            margin-bottom: 12px;
        }

        .matching-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 8px;
        }

        .matching-layout {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 24px;
            margin-bottom: 20px;
        }

        .cities-list {
            background-color: #f8fafc;
            padding: 16px;
            border-radius: 8px;
        }

        .features-list {
            background-color: #f8fafc;
            padding: 16px;
            border-radius: 8px;
        }

        .city-item {
            display: flex;
            align-items: center;
            gap: 8px;
            margin-bottom: 12px;
        }

        .submit-section {
            text-align: center;
            padding: 24px;
            border-top: 1px solid #e5e7eb;
            background-color: #f9fafb;
            margin-top: 40px;
            border-radius: 8px;
        }

        .submit-button {
            padding: 12px 48px;
            background-color: #059669;
            color: white;
            border: none;
            border-radius: 8px;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: background-color 0.2s;
        }

        .submit-button:hover {
            background-color: #047857;
        }

        .submit-button:disabled {
            background-color: #9ca3af;
            cursor: not-allowed;
        }

        .results-modal {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-color: rgba(0, 0, 0, 0.5);
            display: flex;
            align-items: center;
            justify-content: center;
            z-index: 1000;
        }

        .results-content {
            background-color: white;
            padding: 32px;
            border-radius: 12px;
            max-width: 600px;
            width: 90%;
            max-height: 80vh;
            overflow-y: auto;
        }

        .results-title {
            font-size: 1.5rem;
            font-weight: 600;
            color: #111827;
            margin-bottom: 24px;
            text-align: center;
        }

        .score-summary {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
            gap: 16px;
            margin-bottom: 24px;
        }

        .score-item {
            text-align: center;
            padding: 16px;
            border-radius: 8px;
            background-color: #f3f4f6;
        }

        .score-number {
            font-size: 1.5rem;
            font-weight: bold;
            color: #059669;
        }

        .score-label {
            font-size: 0.875rem;
            color: #6b7280;
            margin-top: 4px;
        }

        .close-button {
            width: 100%;
            padding: 12px;
            background-color: #6b7280;
            color: white;
            border: none;
            border-radius: 8px;
            font-size: 1rem;
            cursor: pointer;
            margin-top: 16px;
        }

        .close-button:hover {
            background-color: #4b5563;
        }

        .bottom-navigation {
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            background-color: white;
            border-top: 0;
            padding: 12px 16px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            z-index: 100;
            box-shadow: none;
        }

        .parts-navigation {
            display: flex;
            align-items: center;
            gap: 24px;
            flex-wrap: wrap;
        }

        .part-nav-item {
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .part-button {
            padding: 4px 12px;
            border-radius: 4px;
            font-size: 0.875rem;
            font-weight: 500;
            border: none;
            cursor: pointer;
            transition: all 0.2s;
        }

        .part-button.active {
            background-color: #2563eb;
            color: white;
        }

        .part-button:not(.active) {
            color: #6b7280;
            background-color: transparent;
        }

        .part-button:not(.active):hover {
            color: #111827;
        }

        .question-numbers {
            display: flex;
            align-items: center;
            gap: 4px;
            flex-wrap: wrap;
        }

        .question-number {
            width: 24px;
            height: 24px;
            font-size: 0.75rem;
            border-radius: 4px;
            border: none;
            cursor: pointer;
            transition: all 0.2s;
            background-color: #e5e7eb;
            color: #6b7280;
        }

        .question-number:hover {
            background-color: #d1d5db;
        }

        .nav-arrow {
            background-color: #000;
            color: white;
            border: none;
            padding: 8px;
            border-radius: 4px;
            cursor: pointer;
            transition: background-color 0.2s;
        }

        .nav-arrow:hover:not(:disabled) {
            background-color: #374151;
        }

        .nav-arrow:disabled {
            opacity: 0.5;
            cursor: not-allowed;
        }

        .hidden {
            display: none !important;
        }

        .selectable-text {
            user-select: text;
            cursor: text;
        }

        /* Highlight functionality styles */
        .highlight {
            background-color: #ffff00;
            cursor: pointer;
        }

        #highlight-btn,
        #remove-highlight-btn {
            position: absolute;
            z-index: 9999;
            display: none;
            padding: 6px 12px;
            font-size: 14px;
            border: 1px solid #888;
            border-radius: 4px;
            cursor: pointer;
            box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
        }

        #highlight-btn {
            background: #fffbe7;
        }

        #remove-highlight-btn {
            background: #ffeaea;
            color: #b00;
            border-color: #b00;
        }

        @media (max-width: 768px) {
            .main-content {
                padding: 12px 16px;
            }

            .parts-navigation {
                gap: 12px;
            }

            .question-numbers {
                max-width: 200px;
            }

            .bottom-navigation {
                padding: 8px 12px;
            }

            .matching-layout {
                grid-template-columns: 1fr;
                gap: 16px;
            }
        }