#quiz-app-root {
    --nt-primary: #58cc02;
    --nt-primary-dark: #43a302;
    --nt-accent: #1cb0f6;
    --nt-warn: #ffb020;
    --nt-success: #0ea561;
    --nt-error: #e5484d;
    --nt-bg: linear-gradient(180deg, #eff6ff 0%, #f8fafc 45%, #f6fff4 100%);
    --nt-card-bg: #ffffff;
    --nt-text-main: #111827;
    --nt-text-muted: #5b6474;
    --nt-border: #dbe4ef;
    --nt-radius: 8px;
    --nt-fast: 160ms;
    --nt-soft-shadow: 0 16px 32px rgba(16, 24, 40, 0.08);
    font-family: "Inter", sans-serif !important;
    background: var(--nt-bg);
    color: var(--nt-text-main);
    padding: 14px 12px 20px;
    box-sizing: border-box !important;
    position: relative;
    font-size: 15px;
}

#quiz-app-root * {
    box-sizing: border-box !important;
}

/* Guard against aggressive theme CSS on host websites */
#quiz-app-root,
#quiz-app-root * {
    font-family: "Inter", sans-serif !important;
    letter-spacing: 0 !important;
}

#quiz-app-root h1,
#quiz-app-root h2,
#quiz-app-root h3,
#quiz-app-root p,
#quiz-app-root span,
#quiz-app-root button,
#quiz-app-root label,
#quiz-app-root input {
    text-transform: none !important;
}

#quiz-app-root .nu-shell {
    width: min(100%, 540px);
    margin: 0 auto;
}

#quiz-app-root .nu-screen {
    opacity: 1;
}

#quiz-app-root .nu-screen-enter {
    animation: nu-slide-up 360ms ease both;
}

#quiz-app-root .card {
    background: var(--nt-card-bg);
    border-radius: var(--nt-radius);
    padding: 18px 16px;
    box-shadow: var(--nt-soft-shadow);
    border: 1px solid var(--nt-border);
    margin-bottom: 16px;
    color: var(--nt-text-main) !important;
    background-clip: padding-box;
}

#quiz-app-root .hidden {
    display: none !important;
}

#quiz-app-root .btn {
    appearance: none;
    border: none;
    border-radius: 999px;
    font-size: 14px !important;
    line-height: 1;
    font-weight: 700 !important;
    letter-spacing: 0;
    min-height: 48px !important;
    padding: 0 18px;
    cursor: pointer;
    transition: transform var(--nt-fast) ease, box-shadow var(--nt-fast) ease, filter var(--nt-fast) ease, opacity var(--nt-fast) ease;
    box-shadow: 0 10px 22px rgba(17, 24, 39, 0.12);
    text-transform: none !important;
}

#quiz-app-root .btn:disabled {
    opacity: 0.62;
    cursor: not-allowed;
    box-shadow: none;
}

#quiz-app-root .btn:not(:disabled):active {
    transform: translateY(1px) scale(0.99);
}

#quiz-app-root .btn-primary {
    background: linear-gradient(180deg, #6ddf16 0%, var(--nt-primary) 100%);
    color: #fff;
}

#quiz-app-root .btn-primary:not(:disabled):hover {
    box-shadow: 0 14px 28px rgba(67, 163, 2, 0.3);
    filter: brightness(1.02);
}

#quiz-app-root .btn-secondary {
    background: #eaf6ff;
    color: #065f8f;
}

#quiz-app-root .btn-success {
    background: #25d366;
    color: #fff;
}

#quiz-app-root .btn-ghost {
    background: #f8fafc;
    color: #364152;
    border: 1px solid var(--nt-border);
    box-shadow: none;
}

#quiz-app-root .btn-wide {
    width: 100%;
}

#quiz-app-root input[type="text"],
#quiz-app-root input[type="email"] {
    width: 100%;
    min-height: 46px;
    padding: 12px 14px;
    border: 1px solid #ced8e4;
    border-radius: 10px;
    margin: 6px 0 12px;
    font-size: 15px;
    color: var(--nt-text-main);
    background: #fff;
    transition: border-color var(--nt-fast) ease, box-shadow var(--nt-fast) ease;
}

#quiz-app-root input[type="text"]:focus,
#quiz-app-root input[type="email"]:focus {
    outline: none;
    border-color: var(--nt-accent);
    box-shadow: 0 0 0 4px rgba(28, 176, 246, 0.15);
}

#quiz-app-root .nu-eyebrow {
    font-size: 12px;
    text-transform: uppercase !important;
    color: #4f46e5;
    font-weight: 800;
    margin-bottom: 8px;
}

#quiz-app-root .nu-title {
    margin: 0 0 4px;
    font-size: 25px;
    line-height: 1.2;
}

#quiz-app-root .nu-subtitle {
    margin: 0 0 18px;
    color: var(--nt-text-muted);
    font-size: 14px;
}

#quiz-app-root .nu-auth-card label {
    font-size: 12px;
    text-transform: uppercase !important;
    color: #4a5568;
    font-weight: 800;
    display: block;
    margin-top: 4px;
}

#quiz-app-root .nu-privacy-note {
    margin: 8px 0 16px;
    font-size: 13px;
    line-height: 1.45;
    color: #475569;
    background: #f8fbff;
    border: 1px solid #dbeafe;
    border-radius: 8px;
    padding: 10px 12px;
}

#quiz-app-root .nu-quiz-card {
    overflow: hidden;
}

#quiz-app-root .nu-topbar {
    margin-bottom: 16px;
}

#quiz-app-root .nu-progress-wrap {
    margin-bottom: 10px;
}

#quiz-app-root #progress-bar {
    display: block;
    color: #0f766e;
    font-weight: 800;
    font-size: 13px;
    margin-bottom: 8px;
}

#quiz-app-root .nu-progress-track {
    width: 100%;
    height: 10px;
    border-radius: 999px;
    background: #e8eef5;
    overflow: hidden;
}

#quiz-app-root #nu-progress-fill {
    width: 0;
    height: 100%;
    border-radius: inherit;
    background: linear-gradient(90deg, #1cb0f6 0%, #58cc02 100%);
    transition: width 260ms ease;
}

#quiz-app-root .nu-chip-row {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

#quiz-app-root .nu-chip {
    font-size: 12px;
    font-weight: 800;
    border-radius: 999px;
    padding: 6px 10px;
    background: #eff6ff;
    color: #1e40af;
}

#quiz-app-root .nu-chip-accent {
    background: #fef3c7;
    color: #92400e;
}

#quiz-app-root .nu-chip-pulse {
    animation: nu-pulse 320ms ease;
}

#quiz-app-root .nu-question-head {
    border-top: 1px solid #e8eef5;
    border-bottom: 1px solid #e8eef5;
    padding: 12px 0;
    margin-bottom: 14px;
}

#quiz-app-root .nu-quiz-title {
    margin: 0;
    font-size: clamp(22px, 3.8vw, 28px) !important;
    line-height: 1.2 !important;
    font-weight: 800 !important;
    color: #0f172a !important;
}

#quiz-app-root .nu-course-unit {
    margin: 6px 0 0;
    color: #64748b;
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0;
    text-transform: uppercase !important;
}

#quiz-app-root .nu-question-text {
    margin: 0 0 10px;
    font-size: clamp(20px, 4vw, 26px) !important;
    line-height: 1.25;
    font-weight: 800 !important;
    color: #0f172a !important;
    text-transform: none !important;
}

#quiz-app-root .nu-question-hint {
    margin: 0 0 14px;
    font-size: 13px;
    color: #4b5563;
    transition: color var(--nt-fast) ease;
}

#quiz-app-root .nu-question-hint-ready {
    color: #0369a1;
}

#quiz-app-root .nu-question-hint-correct {
    color: #0f766e;
    font-weight: 700;
}

#quiz-app-root .nu-question-hint-wrong {
    color: #b45309;
    font-weight: 700;
}

#quiz-app-root #options-container {
    display: grid;
    gap: 10px;
}

#quiz-app-root .option-item {
    width: 100%;
    text-align: left;
    border: 1px solid #d4e2ef;
    border-radius: 10px;
    background: #ffffff;
    padding: 12px 12px;
    cursor: pointer;
    display: flex;
    align-items: flex-start;
    gap: 10px;
    color: var(--nt-text-main) !important;
    font-size: 15px !important;
    font-weight: 600 !important;
    line-height: 1.35 !important;
    transition: border-color var(--nt-fast) ease, background-color var(--nt-fast) ease, transform var(--nt-fast) ease, box-shadow var(--nt-fast) ease;
    text-transform: none !important;
}

#quiz-app-root .option-item .option-copy {
    text-transform: none !important;
    font-size: 15px !important;
    line-height: 1.35 !important;
    font-weight: 600 !important;
}

#quiz-app-root .option-item:hover {
    transform: translateY(-1px);
    border-color: #92c5ff;
    box-shadow: 0 8px 18px rgba(28, 176, 246, 0.15);
}

#quiz-app-root .option-item .option-badge {
    width: 24px;
    height: 24px;
    min-width: 24px;
    border-radius: 999px;
    border: 1px solid #d4e2ef;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    font-weight: 800;
    color: #374151;
    background: #f8fafc;
}

#quiz-app-root .option-item.selected {
    border-color: #77b9ff;
    background: #eff8ff;
}

#quiz-app-root .option-item.selected .option-badge {
    background: #1cb0f6;
    border-color: #1cb0f6;
    color: #fff;
}

#quiz-app-root .option-item.correct {
    border-color: #22c55e;
    background: #ecfdf3;
}

#quiz-app-root .option-item.wrong {
    border-color: #f87171;
    background: #fff1f2;
}

#quiz-app-root .nu-fill-input {
    margin-top: 4px;
}

#quiz-app-root .feedback {
    padding: 14px;
    border-radius: 10px;
    margin-top: 14px;
    border: 1px solid transparent;
}

#quiz-app-root .feedback-correct {
    background: #effdf5;
    color: #065f46;
    border-color: #9de7c3;
}

#quiz-app-root .feedback-wrong {
    background: #fff7ed;
    color: #9a3412;
    border-color: #fed7aa;
}

#quiz-app-root .nu-feedback-head {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 10px;
    margin-bottom: 8px;
}

#quiz-app-root .nu-feedback-title {
    font-size: 16px;
    font-weight: 800;
}

#quiz-app-root .nu-feedback-points {
    font-size: 12px;
    font-weight: 800;
    background: rgba(255, 255, 255, 0.6);
    border-radius: 999px;
    padding: 4px 8px;
}

#quiz-app-root .nu-feedback-line {
    margin: 6px 0;
    line-height: 1.45;
    color: #374151;
}

#quiz-app-root .nu-feedback-label {
    font-weight: 800;
    font-size: 12px;
    letter-spacing: 0;
    text-transform: uppercase !important;
    color: #6b7280;
}

#quiz-app-root .nu-actions {
    margin-top: 18px;
    padding-top: 14px;
    border-top: 1px solid #e5edf5;
    display: flex;
    justify-content: flex-end;
    gap: 10px;
}

#quiz-app-root .nu-results-card {
    text-align: center;
    background: linear-gradient(180deg, #ffffff 0%, #f8fbff 100%) !important;
    border: 1px solid #dbe7f3 !important;
    box-shadow: 0 20px 36px rgba(15, 23, 42, 0.12) !important;
}

#quiz-app-root .nu-result-badge {
    margin: 0 auto 12px;
    width: fit-content;
    padding: 7px 12px;
    border-radius: 999px;
    background: #eaffdd;
    color: #3a7500;
    font-size: 12px;
    font-weight: 800;
    text-transform: uppercase !important;
}

#quiz-app-root .nu-results-title {
    margin: 0;
    font-size: 30px;
    line-height: 1.12;
    color: #0f172a !important;
}

#quiz-app-root .nu-results-copy {
    margin: 8px 0 20px;
    color: #64748b !important;
}

#quiz-app-root .nu-results-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
    margin-bottom: 18px;
}

#quiz-app-root .nu-stat {
    background: #f8fbff;
    border: 1px solid #dbeafe;
    border-radius: 8px;
    padding: 10px;
    box-shadow: 0 6px 12px rgba(15, 23, 42, 0.05);
}

#quiz-app-root .nu-stat-label {
    font-size: 11px;
    font-weight: 800;
    text-transform: uppercase !important;
    color: #64748b;
}

#quiz-app-root .nu-stat-value {
    margin-top: 6px;
    font-size: 28px;
    font-weight: 800;
    line-height: 1;
    color: #0f172a !important;
    text-transform: none !important;
}

#quiz-app-root .nu-results-summary {
    text-align: left;
    margin: 0 0 18px;
}

#quiz-app-root .nu-inline-panel {
    border-radius: 8px;
    border: 1px solid #d9e7f5;
    background: #f8fbff;
    padding: 12px;
    margin-bottom: 10px;
}

#quiz-app-root .nu-inline-panel h3 {
    margin: 0 0 8px;
    font-size: 14px;
}

#quiz-app-root .nu-inline-panel p {
    margin: 0;
    color: #334155;
    line-height: 1.5;
}

#quiz-app-root .nu-ad-panel {
    text-align: center;
    background: #fff;
}

#quiz-app-root .nu-ad-image {
    max-width: 100%;
    height: auto;
    border-radius: 6px;
    border: 1px solid #e2e8f0;
}

#quiz-app-root .nu-results-actions {
    display: grid;
    gap: 10px;
}

#quiz-app-root #nu-backup-options {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
}

#quiz-app-root .nu-browser-notice {
    margin-bottom: 10px;
    padding: 11px 12px;
    background: #fff7ed;
    color: #9a3412;
    border: 1px solid #fed7aa;
    border-radius: 8px;
    font-size: 13px;
    font-weight: 600;
    line-height: 1.4;
}

@keyframes nu-slide-up {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes nu-pulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.06); }
    100% { transform: scale(1); }
}

@media (max-width: 480px) {
    #quiz-app-root .card {
        padding: 14px 12px;
    }

    #quiz-app-root .nu-title,
    #quiz-app-root .nu-results-title {
        font-size: 24px;
    }

    #quiz-app-root .nu-question-text {
        font-size: 20px;
    }

    #quiz-app-root .nu-actions {
        justify-content: stretch;
    }

    #quiz-app-root .nu-actions .btn {
        width: 100%;
    }

    #quiz-app-root .nu-results-grid {
        grid-template-columns: 1fr;
    }

    #quiz-app-root #nu-backup-options {
        grid-template-columns: 1fr;
    }
}

@media (prefers-reduced-motion: reduce) {
    #quiz-app-root *,
    #quiz-app-root *::before,
    #quiz-app-root *::after {
        animation: none !important;
        transition: none !important;
    }
}