/**
 * Easy Padhai universal mobile answer viewer.
 * The original answer node is moved into this dialog and restored on minimize.
 */

.ep-mobile-answer-viewer[hidden] {
    display: none !important;
}

.ep-mobile-answer-viewer {
    display: none;
}

@media (max-width: 782px) {
    html.ep-mobile-answer-viewer-open,
    body.ep-mobile-answer-viewer-open {
        overflow: hidden !important;
        overscroll-behavior: none;
    }

    .ep-mobile-answer-viewer {
        position: fixed;
        inset: 0;
        z-index: 2147483000;
        display: block;
        width: 100vw;
        height: 100vh;
        height: 100dvh;
        background: #f5f8ff;
        color: #111827;
        font-family: inherit;
        opacity: 0;
        visibility: hidden;
        pointer-events: none;
        transform: translateY(12px);
        transition: opacity 180ms ease, transform 180ms ease, visibility 180ms ease;
    }

    .ep-mobile-answer-viewer.is-open {
        opacity: 1;
        visibility: visible;
        pointer-events: auto;
        transform: translateY(0);
    }

    .ep-mobile-answer-viewer__shell {
        display: flex;
        flex-direction: column;
        width: 100%;
        height: 100%;
        min-height: 0;
        background:
            radial-gradient(circle at 0 0, rgba(37, 99, 235, 0.1), transparent 34%),
            radial-gradient(circle at 100% 0, rgba(124, 58, 237, 0.09), transparent 38%),
            #f8faff;
    }

    .ep-mobile-answer-viewer__header {
        position: relative;
        z-index: 3;
        display: flex;
        flex: 0 0 auto;
        align-items: center;
        justify-content: space-between;
        gap: 12px;
        min-height: 62px;
        padding: calc(10px + env(safe-area-inset-top, 0px)) 14px 10px;
        background: rgba(255, 255, 255, 0.96);
        border-bottom: 1px solid rgba(148, 163, 184, 0.35);
        box-shadow: 0 8px 24px rgba(15, 23, 42, 0.08);
        backdrop-filter: blur(16px);
        -webkit-backdrop-filter: blur(16px);
    }

    .ep-mobile-answer-viewer__heading {
        min-width: 0;
    }

    .ep-mobile-answer-viewer__eyebrow {
        display: block;
        margin-bottom: 2px;
        color: #2563eb;
        font-size: 10px;
        font-weight: 800;
        letter-spacing: 0.12em;
        line-height: 1.2;
    }

    .ep-mobile-answer-viewer__title {
        margin: 0 !important;
        color: #111827 !important;
        font-size: clamp(18px, 5vw, 22px) !important;
        font-weight: 800 !important;
        line-height: 1.2 !important;
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
    }

    .ep-mobile-answer-viewer__close {
        display: inline-flex;
        flex: 0 0 44px;
        align-items: center;
        justify-content: center;
        width: 44px;
        height: 44px;
        margin: 0;
        padding: 0;
        border: 1px solid #d6deed;
        border-radius: 14px;
        background: #fff;
        color: #0f4c81;
        font: 400 34px/1 Arial, sans-serif;
        box-shadow: 0 5px 16px rgba(15, 23, 42, 0.08);
        cursor: pointer;
        -webkit-tap-highlight-color: transparent;
    }

    .ep-mobile-answer-viewer__close:focus-visible,
    .ep-mobile-answer-viewer__action:focus-visible,
    .ep-mobile-answer-reopen:focus-visible {
        outline: 3px solid rgba(37, 99, 235, 0.35);
        outline-offset: 2px;
    }

    .ep-mobile-answer-viewer__question {
        flex: 0 0 auto;
        margin: 10px 12px 0;
        padding: 10px 12px;
        border: 1px solid #dbe5f5;
        border-radius: 14px;
        background: rgba(255, 255, 255, 0.9);
        box-shadow: 0 4px 15px rgba(15, 23, 42, 0.05);
    }

    .ep-mobile-answer-viewer__question-label {
        display: block;
        margin-bottom: 3px;
        color: #2563eb;
        font-size: 11px;
        font-weight: 800;
        letter-spacing: 0.04em;
        text-transform: uppercase;
    }

    .ep-mobile-answer-viewer__question-text {
        display: -webkit-box;
        margin: 0 !important;
        overflow: hidden;
        color: #334155 !important;
        font-size: 13px !important;
        font-weight: 600;
        line-height: 1.4 !important;
        overflow-wrap: anywhere;
        -webkit-box-orient: vertical;
        -webkit-line-clamp: 2;
    }

    .ep-mobile-answer-viewer__content {
        position: relative;
        flex: 1 1 auto;
        min-height: 0;
        width: 100%;
        padding: 12px 12px 18px;
        overflow-x: hidden;
        overflow-y: auto;
        scroll-behavior: smooth;
        overscroll-behavior: contain;
        -webkit-overflow-scrolling: touch;
    }

    .ep-mobile-answer-viewer__content > .ep-mobile-answer-source--fullscreen,
    .ep-mobile-answer-viewer__content > .ai-study-output-pane,
    .ep-mobile-answer-viewer__content > [data-ai-study-tool-output],
    .ep-mobile-answer-viewer__content > [data-ai-study-answer-output],
    .ep-mobile-answer-viewer__content > [data-ep-math-output] {
        display: block !important;
        box-sizing: border-box !important;
        width: 100% !important;
        max-width: 100% !important;
        min-width: 0 !important;
        height: auto !important;
        min-height: 0 !important;
        max-height: none !important;
        margin: 0 !important;
        padding: 14px !important;
        overflow: visible !important;
        resize: none !important;
        border: 1px solid #dfe7f4 !important;
        border-radius: 18px !important;
        background: #fff !important;
        color: #172033 !important;
        box-shadow: 0 8px 26px rgba(15, 23, 42, 0.08) !important;
        line-height: 1.68 !important;
        word-break: normal !important;
        overflow-wrap: anywhere !important;
        -webkit-mask-image: none !important;
        mask-image: none !important;
    }

    .ep-mobile-answer-viewer__content .ai-study-output-block,
    .ep-mobile-answer-viewer__content .ai-study-learn-block,
    .ep-mobile-answer-viewer__content .ai-study-advanced-output,
    .ep-mobile-answer-viewer__content .ai-study-answer-card,
    .ep-mobile-answer-viewer__content .ai-study-speaking-correction,
    .ep-mobile-answer-viewer__content .ai-study-speaking-practice-pack {
        max-width: 100% !important;
        margin-right: 0 !important;
        margin-left: 0 !important;
    }

    .ep-mobile-answer-viewer__content h1,
    .ep-mobile-answer-viewer__content h2,
    .ep-mobile-answer-viewer__content h3,
    .ep-mobile-answer-viewer__content h4 {
        max-width: 100%;
        color: #111827 !important;
        overflow-wrap: anywhere;
    }

    .ep-mobile-answer-viewer__content h1,
    .ep-mobile-answer-viewer__content h2 {
        font-size: clamp(24px, 8vw, 34px) !important;
        line-height: 1.18 !important;
    }

    .ep-mobile-answer-viewer__content h3 {
        font-size: clamp(20px, 6vw, 27px) !important;
        line-height: 1.24 !important;
    }

    .ep-mobile-answer-viewer__content h4 {
        font-size: clamp(17px, 5vw, 21px) !important;
    }

    .ep-mobile-answer-viewer__content p,
    .ep-mobile-answer-viewer__content li,
    .ep-mobile-answer-viewer__content td,
    .ep-mobile-answer-viewer__content th {
        color: #263247 !important;
        font-size: 16px !important;
        line-height: 1.68 !important;
    }

    .ep-mobile-answer-viewer__content img,
    .ep-mobile-answer-viewer__content video,
    .ep-mobile-answer-viewer__content canvas,
    .ep-mobile-answer-viewer__content svg {
        max-width: 100% !important;
        height: auto;
    }

    .ep-mobile-answer-viewer__content table {
        display: block;
        max-width: 100%;
        overflow-x: auto;
        border-collapse: collapse;
        -webkit-overflow-scrolling: touch;
    }

    .ep-mobile-answer-viewer__content pre,
    .ep-mobile-answer-viewer__content code {
        max-width: 100%;
        white-space: pre-wrap;
        word-break: break-word;
    }


    .ep-mobile-answer-viewer__status {
        position: absolute !important;
        width: 1px !important;
        height: 1px !important;
        margin: -1px !important;
        padding: 0 !important;
        overflow: hidden !important;
        clip: rect(0 0 0 0) !important;
        clip-path: inset(50%) !important;
        border: 0 !important;
        white-space: nowrap !important;
    }

    .ep-mobile-answer-viewer__actions {
        position: relative;
        z-index: 3;
        display: grid;
        flex: 0 0 auto;
        grid-template-columns: repeat(3, minmax(0, 1fr));
        gap: 8px;
        padding: 10px 10px calc(10px + env(safe-area-inset-bottom, 0px));
        background: rgba(255, 255, 255, 0.97);
        border-top: 1px solid rgba(148, 163, 184, 0.35);
        box-shadow: 0 -10px 28px rgba(15, 23, 42, 0.09);
        backdrop-filter: blur(16px);
        -webkit-backdrop-filter: blur(16px);
    }

    .ep-mobile-answer-viewer__action {
        display: inline-flex;
        min-width: 0;
        min-height: 48px;
        align-items: center;
        justify-content: center;
        gap: 6px;
        margin: 0;
        padding: 8px 6px;
        border: 1px solid #d8e1ef;
        border-radius: 13px;
        background: #fff;
        color: #174ea6;
        font-family: inherit;
        font-size: 12px;
        font-weight: 800;
        line-height: 1.15;
        text-align: center;
        box-shadow: 0 4px 12px rgba(15, 23, 42, 0.05);
        cursor: pointer;
        -webkit-tap-highlight-color: transparent;
    }

    .ep-mobile-answer-viewer__action:hover,
    .ep-mobile-answer-viewer__action:active,
    .ep-mobile-answer-viewer__action.is-active {
        border-color: transparent;
        background: linear-gradient(135deg, #2563eb, #7c3aed);
        color: #fff;
    }

    .ep-mobile-answer-viewer__action[hidden] {
        display: none !important;
    }

    .ep-mobile-answer-viewer__action:disabled {
        opacity: 0.55;
        cursor: wait;
    }

    .ep-mobile-answer-viewer__action-icon {
        flex: 0 0 auto;
        font-size: 15px;
        font-weight: 900;
        line-height: 1;
    }

    .ep-mobile-answer-viewer__action-label {
        min-width: 0;
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
    }

    .ep-mobile-answer-source-placeholder {
        display: none !important;
    }

    .ep-mobile-answer-source--minimized {
        position: relative !important;
        box-sizing: border-box !important;
        min-height: 110px !important;
        max-height: 150px !important;
        overflow: hidden !important;
        resize: none !important;
        border-bottom-right-radius: 0 !important;
        border-bottom-left-radius: 0 !important;
        -webkit-mask-image: linear-gradient(to bottom, #000 0, #000 68%, transparent 100%) !important;
        mask-image: linear-gradient(to bottom, #000 0, #000 68%, transparent 100%) !important;
    }

    .ep-mobile-answer-compact-bar {
        display: flex;
        box-sizing: border-box;
        width: 100%;
        max-width: 100%;
        align-items: center;
        justify-content: space-between;
        gap: 10px;
        margin: -1px 0 14px;
        padding: 9px 10px;
        border: 1px solid #d8e3f3;
        border-top: 0;
        border-radius: 0 0 14px 14px;
        background: #f8fbff;
        box-shadow: 0 7px 18px rgba(15, 23, 42, 0.06);
    }

    .ep-mobile-answer-compact-bar__text {
        min-width: 0;
        color: #475569;
        font-size: 11px;
        font-weight: 700;
        line-height: 1.25;
    }

    .ep-mobile-answer-reopen {
        flex: 0 0 auto;
        min-height: 38px;
        margin: 0;
        padding: 8px 12px;
        border: 0;
        border-radius: 11px;
        background: linear-gradient(135deg, #2563eb, #7c3aed);
        color: #fff;
        font-family: inherit;
        font-size: 11px;
        font-weight: 800;
        line-height: 1.15;
        white-space: nowrap;
        box-shadow: 0 6px 14px rgba(79, 70, 229, 0.22);
        cursor: pointer;
    }


    /* v67.17 — one reading canvas: remove box-inside-box layers in full-screen answers. */
    .ep-mobile-answer-viewer__content {
        box-sizing: border-box;
        width: 100%;
        max-width: 100%;
        padding: 8px 6px 14px;
    }

    .ep-mobile-answer-viewer__content > .ep-mobile-answer-source--fullscreen,
    .ep-mobile-answer-viewer__content > .ai-study-output-pane,
    .ep-mobile-answer-viewer__content > [data-ai-study-tool-output],
    .ep-mobile-answer-viewer__content > [data-ai-study-answer-output],
    .ep-mobile-answer-viewer__content > [data-ep-math-output],
    .ep-mobile-answer-viewer__content > [data-ai-study-usa-output],
    .ep-mobile-answer-viewer__content > [data-ai-study-english-tool-output],
    .ep-mobile-answer-viewer__content > [data-ai-study-grammar-tool-output] {
        padding: 0 !important;
        border: 0 !important;
        border-radius: 0 !important;
        background: transparent !important;
        box-shadow: none !important;
    }

    .ep-mobile-answer-viewer__content .ai-study-advanced-output,
    .ep-mobile-answer-viewer__content .ai-study-advanced-output__body,
    .ep-mobile-answer-viewer__content .ai-study-answer-output,
    .ep-mobile-answer-viewer__content .ai-study-output-pane,
    .ep-mobile-answer-viewer__content .ai-study-result-box,
    .ep-mobile-answer-viewer__content .ai-study-result-box--horizontal,
    .ep-mobile-answer-viewer__content .ai-study-tool-output,
    .ep-mobile-answer-viewer__content .ai-study-output-window,
    .ep-mobile-answer-viewer__content .ai-study-output-window__body,
    .ep-mobile-answer-viewer__content .ai-study-speaking-correction,
    .ep-mobile-answer-viewer__content .ai-study-speaking-practice-pack {
        box-sizing: border-box !important;
        width: 100% !important;
        max-width: 100% !important;
        min-width: 0 !important;
        min-height: 0 !important;
        max-height: none !important;
        margin: 0 !important;
        padding: 0 !important;
        overflow: visible !important;
        border: 0 !important;
        border-radius: 0 !important;
        background: transparent !important;
        box-shadow: none !important;
    }

    .ep-mobile-answer-viewer__content .ai-study-advanced-output__body {
        display: block !important;
    }

    .ep-mobile-answer-viewer__content .ai-study-learn-block,
    .ep-mobile-answer-viewer__content .ai-study-output-block,
    .ep-mobile-answer-viewer__content .ai-study-answer-card,
    .ep-mobile-answer-viewer__content .ep-answer-section,
    .ep-mobile-answer-viewer__content .ep-math-answer-card {
        box-sizing: border-box !important;
        width: 100% !important;
        max-width: 100% !important;
        margin: 0 0 10px !important;
        padding: 16px 14px !important;
        border: 1px solid #dfe7f3 !important;
        border-radius: 14px !important;
        background: #fff !important;
        box-shadow: 0 3px 12px rgba(15, 23, 42, 0.045) !important;
    }

    .ep-mobile-answer-viewer__content .ai-study-learn-block:last-child,
    .ep-mobile-answer-viewer__content .ai-study-output-block:last-child,
    .ep-mobile-answer-viewer__content .ai-study-answer-card:last-child {
        margin-bottom: 0 !important;
    }

    .ep-mobile-answer-viewer__content .ai-study-advanced-toolbar,
    .ep-mobile-answer-viewer__content .ai-study-output-window__head,
    .ep-mobile-answer-viewer__content .ai-study-result-actions {
        margin: 10px 0 0 !important;
        padding: 10px 0 0 !important;
        border-right: 0 !important;
        border-bottom: 0 !important;
        border-left: 0 !important;
        background: transparent !important;
        box-shadow: none !important;
    }

    .ep-mobile-answer-viewer__content .ai-study-formula-box {
        width: 100% !important;
        max-width: 100% !important;
        margin: 10px 0 !important;
    }

    .ep-mobile-answer-viewer__content .ai-study-learn-block h4,
    .ep-mobile-answer-viewer__content .ai-study-output-block h4 {
        margin-top: 0 !important;
    }

    .ep-mobile-answer-viewer.is-dark .ep-mobile-answer-viewer__shell {
        background: #090f1d;
    }

    .ep-mobile-answer-viewer.is-dark .ep-mobile-answer-viewer__header,
    .ep-mobile-answer-viewer.is-dark .ep-mobile-answer-viewer__actions {
        background: rgba(12, 18, 32, 0.97);
        border-color: rgba(100, 116, 139, 0.45);
    }

    .ep-mobile-answer-viewer.is-dark .ep-mobile-answer-viewer__title,
    .ep-mobile-answer-viewer.is-dark .ep-mobile-answer-viewer__content h1,
    .ep-mobile-answer-viewer.is-dark .ep-mobile-answer-viewer__content h2,
    .ep-mobile-answer-viewer.is-dark .ep-mobile-answer-viewer__content h3,
    .ep-mobile-answer-viewer.is-dark .ep-mobile-answer-viewer__content h4 {
        color: #f8fafc !important;
    }

    .ep-mobile-answer-viewer.is-dark .ep-mobile-answer-viewer__question,
    .ep-mobile-answer-viewer.is-dark .ep-mobile-answer-viewer__content .ai-study-learn-block,
    .ep-mobile-answer-viewer.is-dark .ep-mobile-answer-viewer__content .ai-study-output-block,
    .ep-mobile-answer-viewer.is-dark .ep-mobile-answer-viewer__content .ai-study-answer-card,
    .ep-mobile-answer-viewer.is-dark .ep-mobile-answer-viewer__action {
        border-color: #334155 !important;
        background: #111827 !important;
        color: #e2e8f0 !important;
    }

    .ep-mobile-answer-viewer.is-dark .ep-mobile-answer-viewer__question-text,
    .ep-mobile-answer-viewer.is-dark .ep-mobile-answer-viewer__content p,
    .ep-mobile-answer-viewer.is-dark .ep-mobile-answer-viewer__content li,
    .ep-mobile-answer-viewer.is-dark .ep-mobile-answer-viewer__content td,
    .ep-mobile-answer-viewer.is-dark .ep-mobile-answer-viewer__content th {
        color: #dbeafe !important;
    }

    .ep-mobile-answer-viewer.is-dark .ep-mobile-answer-viewer__close {
        border-color: #334155;
        background: #111827;
        color: #93c5fd;
    }
}

@media (max-width: 360px) {
    .ep-mobile-answer-viewer__header {
        min-height: 56px;
        padding-right: 10px;
        padding-left: 10px;
    }

    .ep-mobile-answer-viewer__question {
        margin-right: 8px;
        margin-left: 8px;
    }

    .ep-mobile-answer-viewer__content {
        padding-right: 8px;
        padding-left: 8px;
    }


    .ep-mobile-answer-viewer__status {
        position: absolute !important;
        width: 1px !important;
        height: 1px !important;
        margin: -1px !important;
        padding: 0 !important;
        overflow: hidden !important;
        clip: rect(0 0 0 0) !important;
        clip-path: inset(50%) !important;
        border: 0 !important;
        white-space: nowrap !important;
    }

    .ep-mobile-answer-viewer__actions {
        gap: 6px;
        padding-right: 7px;
        padding-left: 7px;
    }

    .ep-mobile-answer-viewer__action {
        min-height: 45px;
        padding-right: 4px;
        padding-left: 4px;
        font-size: 10.5px;
    }

    .ep-mobile-answer-viewer__action-icon {
        font-size: 13px;
    }
}

@media (prefers-reduced-motion: reduce) {
    .ep-mobile-answer-viewer,
    .ep-mobile-answer-viewer *,
    .ep-mobile-answer-reopen {
        scroll-behavior: auto !important;
        transition: none !important;
        animation: none !important;
    }
}