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.tooltip-inner{max-inline-size:max-content}button.Footer_paywalledToggle__EU8Au{cursor:not-allowed;pointer-events:unset;opacity:unset}button.Footer_paywalledToggle__EU8Au:active{pointer-events:none}input[id=full-answer-toggle]+.Footer_paywalledToggle__EU8Au,input[id=slide-answer-toggle]+.Footer_paywalledToggle__EU8Au{cursor:not-allowed;pointer-events:unset;opacity:unset}input[id=full-answer-toggle]:active+.Footer_paywalledToggle__EU8Au,input[id=slide-answer-toggle]:active+.Footer_paywalledToggle__EU8Au{pointer-events:none}.AnnotationSpace_panel__Jbz2p{flex-shrink:3;border-left:1px solid var(--sme-colour-border-neutral-default);background-color:var(--sme-colour-surface-neutral-1);overflow:hidden;transition:width .4s ease-in-out,opacity .4s ease-in-out}.AnnotationSpace_panel__Jbz2p[data-toggled=open]{width:100%;opacity:1}.AnnotationSpace_panel__Jbz2p[data-toggled=closed]{width:0;opacity:0}.AnnotationSpace_pencil__LlFfU{position:fixed;inset-block-start:calc(var(--header-height) + 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[data-mathml][data-type=definition]{filter:invert(53%) sepia(19%) saturate(7477%) hue-rotate(206deg) brightness(98%) contrast(98%)}.ContentBlock_content__nsZwk [data-mathml][data-type=examMark]{filter:invert(16%) sepia(93%) saturate(3462%) hue-rotate(260deg) brightness(80.5%) contrast(83%)}[data-bs-theme=dark] .ContentBlock_content__nsZwk [data-mathml][data-type=examMark]{filter:invert(78%) sepia(19%) saturate(749%) hue-rotate(206deg) brightness(102%) contrast(102%)}.ContentBlock_content__nsZwk [data-mathml][data-type=finalAnswer]{filter:invert(23%) sepia(85%) saturate(2210%) hue-rotate(130deg) brightness(104%) contrast(82%)}[data-bs-theme=dark] .ContentBlock_content__nsZwk [data-mathml][data-type=finalAnswer]{filter:invert(79%) sepia(14%) saturate(1038%) hue-rotate(90deg) brightness(99%) contrast(100%)}.ContentBlock_content__nsZwk [data-mathml][data-type=working]{filter:invert(13%) sepia(49%) saturate(7000%) hue-rotate(353deg) brightness(71%) contrast(104%)}[data-bs-theme=dark] .ContentBlock_content__nsZwk [data-mathml][data-type=working]{filter:invert(76%) sepia(82%) saturate(5137%) hue-rotate(323deg) brightness(104%) contrast(101%)}.ContentBlock_extract__o7ykg{position:relative;margin-block:1rem;padding:1.5rem;border:1px solid #6e6e6e;border-radius:.5rem}.ContentBlock_extract__o7ykg p{white-space:pre-wrap}.ContentBlock_extract__o7ykg>:last-child{margin-bottom:0}@media(max-width:575.98px){.ContentBlock_extract__o7ykg{padding:.75rem}}.ContentBlock_content__nsZwk ol,.ContentBlock_content__nsZwk ul{-webkit-margin-after:1rem;margin-block-end:1rem}.ContentBlock_content__nsZwk ul{list-style-type:disc}.ContentBlock_content__nsZwk ul ul{list-style-type:circle}.ContentBlock_content__nsZwk ul ul ul{list-style-type:square}.ContentBlock_content__nsZwk ul ul ul ul{list-style-type:disc}.ContentBlock_content__nsZwk ol{list-style-type:decimal}.ContentBlock_content__nsZwk ol ol{list-style-type:lower-alpha}.ContentBlock_content__nsZwk ol ol ol{list-style-type:lower-roman}.ContentBlock_content__nsZwk ol ol ol ol{list-style-type:decimal}.ContentBlock_content__nsZwk li>p{-webkit-margin-after:0;margin-block-end:0}.ContentBlock_table__2BsXv[data-variant=mcq] *{border:none}.ContentBlock_table__2BsXv[data-variant=mcq] td:first-child,.ContentBlock_table__2BsXv[data-variant=mcq] td:nth-child(2){inline-size:1.5rem}.ContentBlock_tableCell__N2pb_{--bs-table-bg:var(--bs-table-accent-bg)}figure.ContentBlock_figure__vJw2q img,img.ContentBlock_figure__vJw2q{display:block;max-inline-size:100%;block-size:auto;margin-inline:auto;padding:.5rem;object-fit:contain;background-color:#fff;border-radius:.5rem}.ContentBlock_figure__vJw2q figcaption{color:var(--sme-colour-text-on-neutral-body);text-align:center}img.ContentBlock_expanded__oWujr{inline-size:100%;block-size:auto;background-color:var(--sme-colour-surface-neutral-0)}[data-bs-theme=dark] 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.ContentBlock_calloutIcon__dXHLs{display:flex;align-items:center;justify-content:center;inline-size:2.5rem;block-size:2.5rem;border-radius:100%;background-color:var(--sme-colour-text-on-neutral-body);color:var(--bs-body-bg);margin-bottom:.75rem}.ContentBlock_callout__qqJZj[data-variant=blockquote] .ContentBlock_calloutIcon__dXHLs svg{block-size:1.75rem;inline-size:1.75rem}.ContentBlock_callout__qqJZj[data-variant=case-study]{-webkit-border-start:.25rem solid #0f7dab;border-inline-start:.25rem solid #0f7dab;position:relative;border-radius:.75rem;overflow:initial;padding:1.5rem}.ContentBlock_callout__qqJZj[data-variant=case-study] :last-child{-webkit-margin-after:0;margin-block-end:0}.ContentBlock_callout__qqJZj[data-variant=case-study] .ContentBlock_calloutIcon__dXHLs{display:flex;align-items:center;justify-content:center;inline-size:2.5rem;block-size:2.5rem;border-radius:100%;background-color:#0f7dab;color:var(--bs-body-bg);margin-bottom:.75rem}.ContentBlock_callout__qqJZj[data-variant=case-study] .ContentBlock_calloutIcon__dXHLs svg{block-size:1.75rem;inline-size:1.75rem}.ContentBlock_callout__qqJZj[data-variant=mark-scheme]{-webkit-border-start:.25rem solid #ffb2b2;border-inline-start:.25rem solid #ffb2b2;position:relative;border-radius:.75rem;overflow:initial;padding:1.5rem}.ContentBlock_callout__qqJZj[data-variant=mark-scheme] :last-child{-webkit-margin-after:0;margin-block-end:0}.ContentBlock_callout__qqJZj[data-variant=mark-scheme] .ContentBlock_calloutIcon__dXHLs{display:flex;align-items:center;justify-content:center;inline-size:2.5rem;block-size:2.5rem;border-radius:100%;background-color:#ff8b8b;color:var(--bs-body-bg);margin-bottom:.75rem}.ContentBlock_callout__qqJZj[data-variant=mark-scheme] .ContentBlock_calloutIcon__dXHLs svg{block-size:1.75rem;inline-size:1.75rem}.ContentBlock_callout__qqJZj[data-variant=exam-tip]{-webkit-border-start:.25rem solid #265bf6;border-inline-start:.25rem solid #265bf6;position:relative;border-radius:.75rem;overflow:initial;padding:1.5rem}.ContentBlock_callout__qqJZj[data-variant=exam-tip] :last-child{-webkit-margin-after:0;margin-block-end:0}.ContentBlock_callout__qqJZj[data-variant=exam-tip] .ContentBlock_calloutIcon__dXHLs{display:flex;align-items:center;justify-content:center;inline-size:2.5rem;block-size:2.5rem;border-radius:100%;background-color:#265bf6;color:var(--bs-body-bg);margin-bottom:.75rem}.ContentBlock_callout__qqJZj[data-variant=exam-tip] .ContentBlock_calloutIcon__dXHLs svg{block-size:1.75rem;inline-size:1.75rem}.ContentBlock_callout__qqJZj[data-variant=worked-example]{-webkit-border-start:.25rem solid #42b163;border-inline-start:.25rem solid #42b163;position:relative;border-radius:.75rem;overflow:initial;padding:1.5rem}.ContentBlock_callout__qqJZj[data-variant=worked-example] :last-child{-webkit-margin-after:0;margin-block-end:0}.ContentBlock_callout__qqJZj[data-variant=worked-example] .ContentBlock_calloutIcon__dXHLs{display:flex;align-items:center;justify-content:center;inline-size:2.5rem;block-size:2.5rem;border-radius:100%;background-color:#42b163;color:var(--bs-body-bg);margin-bottom:.75rem}.ContentBlock_callout__qqJZj[data-variant=worked-example] .ContentBlock_calloutIcon__dXHLs svg{block-size:1.75rem;inline-size:1.75rem}.ContentBlock_callout__qqJZj h4:first-child{font-size:var(--sme-font-size-lg);font-weight:800;text-transform:uppercase}.ContentBlock_callout__qqJZj div>:last-child{-webkit-margin-after:0;margin-block-end:0}.ContentBlock_tiktokWrapper__PjvmL{margin:0 auto 1.5rem!important}.ContentBlock_youtubeWrapper___0f9k{aspect-ratio:16/9;max-inline-size:640px;overflow:hidden;margin-inline:auto;-webkit-margin-after:1.5rem;margin-block-end:1.5rem}.ContentBlock_youtubeWrapper___0f9k .ContentBlock_youtubeIframe__LEC7Z{inline-size:100%;block-size:100%;border:0}.ContentBlock_undraggableImages__5bQp3 img{pointer-events:none}.ContentBlock_unselectableText__bMm_5{-webkit-user-select:none;-moz-user-select:none;user-select:none}.ContentBlock_videoContainer__NCmd_{--video-feedback-height:5rem;--max-video-container-height:90svh;--max-video-player-height:calc(var(--max-video-container-height) - var(--video-feedback-height));display:grid;grid-template-columns:1fr;grid-template-rows:1fr auto;max-block-size:var(--max-video-container-height)}.ContentBlock_videoPlayer__lH8yi,.ContentBlock_videoPlayer__lH8yi iframe,.ContentBlock_videoSkeleton__KWZmZ{max-block-size:var(--max-video-player-height)}.ContentBlock_videoPlayer__lH8yi{grid-row-start:1;grid-column-start:1;position:relative;inline-size:100%}.ContentBlock_playerWrapper__c_Ynz{position:absolute;inset:0;inline-size:100%;block-size:100%}.ContentBlock_videoSkeleton__KWZmZ{grid-row-start:1;grid-column-start:1}.ContentBlock_videoFeedback__bfahn{grid-row-start:2;grid-column-start:1}.ContentBlock_attachedVideoPlaceholder__B2_Iu{background:var(--background-image) no-repeat center/cover;border:0}.ContentBlock_attachedVideoPlaceholder__B2_Iu svg{background:radial-gradient(circle,hsla(0,0%,77%,.667),transparent 20%)}.ContentBlock_youtubeCookieNotice__6NGWR{z-index:1;position:absolute;bottom:.5rem;right:.5rem;max-width:250px}.ContentBlock_audioHighlight__e7_rt{--audio-icon-color:var(--sme-colour-neutral-800);padding:0;background-color:rgba(0,0,0,0);border:none;cursor:pointer;font-size:inherit;font-family:inherit;font-weight:700;color:inherit;-webkit-margin-start:.125rem;margin-inline-start:.125rem}.ContentBlock_audioHighlight__e7_rt.ContentBlock_playing__Jgl7X,.ContentBlock_audioHighlight__e7_rt:hover{--audio-icon-color:rgb(var(--bs-link-color-rgb));color:var(--audio-icon-color)}.ContentBlock_audioIcon__1bcZt{color:var(--audio-icon-color);-webkit-margin-end:-.125rem;margin-inline-end:-.125rem}.ExpandImageModal_expandButton__rZNlQ{position:absolute;inset-block-start:.5rem;inset-inline-end:.5rem}.ExpandImageModal_modalBody__DkHSt,.ExpandImageModal_modalHeader__7aNsZ{display:flex;background-color:var(--sme-colour-surface-neutral-0)}.ExpandImageModal_modalHeader__7aNsZ{justify-content:flex-end;border-bottom:none}.AudioPlayer_button__slvTf{background-color:rgba(0,0,0,0);border:none;padding:.25rem}.AudioPlayer_button__slvTf svg{height:24px;width:24px}.AudioPlayer_root__Uyh8p{border-color:var(--bs-border-color)}.AudioPlayer_timeGroup__6IzIa{font-feature-settings:"tnum";font-variant-numeric:tabular-nums}.AudioPlayer_timeSlider__hL4m8{align-items:center;cursor:pointer;display:flex;flex:1 1;height:36px;position:relative}.AudioPlayer_volumeSlider__EtvvG{align-items:center;cursor:pointer;display:none;flex-shrink:0;height:36px;position:relative;width:64px}@media(min-width:576px){.AudioPlayer_volumeSlider__EtvvG{display:flex}}@media(min-width:768px){.AudioPlayer_volumeSlider__EtvvG{width:80px}}.AudioPlayer_sliderTrack__l_ToK{background-color:var(--sme-colour-neutral-400);border-radius:2px;height:5px;width:100%}.AudioPlayer_sliderTrackFill__Ql8gD{height:5px;width:var(--slider-fill,0)}.AudioPlayer_sliderProgress__cKP4U,.AudioPlayer_sliderTrackFill__Ql8gD{border-radius:2px;left:0;position:absolute;top:50%;transform:translateY(-50%);will-change:width}.AudioPlayer_sliderProgress__cKP4U{height:4px;width:var(--slider-progress,0)}.AudioPlayer_sliderThumb__K_FvB{border-radius:50%;height:14px;left:var(--slider-fill,0);position:absolute;top:50%;transform:translateX(-50%) 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var(--bs-border-color);box-shadow:var(--sme-shadow-md);background-color:var(--bs-secondary-bg)}.AudioPlayer_playbackSpeedMenuInner__2Gwid{display:flex;flex-direction:column}.AudioPlayer_playbackSpeedMenuItem__MBnfn{--bs-dropdown-link-color:var(--sme-colour-text-on-neutral-body);--bs-dropdown-link-hover-color:var(--sme-colour-text-on-neutral-body);--bs-dropdown-link-hover-bg:var(--sme-colour-neutral-200);--bs-dropdown-link-active-color:var(--sme-colour-text-on-neutral-body);--bs-dropdown-link-active-bg:var(--sme-colour-neutral-300);--bs-dropdown-item-padding-x:1rem;--bs-dropdown-item-padding-y:0.5rem;align-items:center;background-color:rgba(0,0,0,0);border:none;cursor:pointer;display:flex;font-size:var(--sme-font-size-sm);justify-content:space-between;text-align:left}.AudioPlayer_playbackSpeedCheckIcon__ygDsm{color:var(--sme-colour-brand-400);height:20px;width:20px}[data-bs-theme=dark] .AudioPlayer_sliderTrack__l_ToK{background-color:var(--sme-colour-neutral-500)}[data-bs-theme=dark] 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li>div,.QuestionContent_lgQuestionContent__VJRMv>div,.QuestionContent_mdQuestionContent__ELrN4>div,.QuestionContent_overwrittenContentStyles___GwrT>div,.QuestionContent_questionContent__APAK7>div{border-radius:0;padding-inline:0}.QuestionContent_choices__czMmP li>div:first-child,.QuestionContent_lgQuestionContent__VJRMv>div:first-child,.QuestionContent_mdQuestionContent__ELrN4>div:first-child,.QuestionContent_overwrittenContentStyles___GwrT>div:first-child,.QuestionContent_questionContent__APAK7>div:first-child{-webkit-padding-before:0;padding-block-start:0}.QuestionContent_choices__czMmP 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".";counter-increment:choices;font-size:var(--sme-font-size-lg);font-weight:700;position:absolute;left:0;line-height:normal;min-width:2rem;padding-right:.25rem;text-align:right}.QuestionPartNumber_number__WzSvy{background-color:var(--sme-colour-neutral-300);display:flex;align-items:center;justify-content:center}[data-bs-theme=dark] 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.UpgradeCard_card__1brCi{background-color:var(--sme-colour-neutral-200);border:1px solid var(--sme-colour-neutral-700)}.Paywall_wrapper__G_15v{position:relative;max-inline-size:31rem;margin-inline:auto;border-radius:.75rem;box-shadow:var(--sme-shadow-md);-webkit-margin-before:-14rem;margin-block-start:-14rem;-webkit-margin-after:14rem;margin-block-end:14rem}.Page_page__hg9l_{--header-height:65px;--container-margin:2rem;min-block-size:100vh;background-color:var(--sme-colour-surface-neutral-0)}.Page_body__ETLPE{display:flex;flex-direction:row;flex:1 1;align-items:stretch;justify-content:center}.Page_wrapper__aT7HO{position:relative;flex-shrink:1;inline-size:min(60rem,100% - var(--container-margin)*2);margin-inline:1rem;-webkit-margin-before:2rem;margin-block-start:2rem;-webkit-margin-start:3rem;margin-inline-start:3rem;padding-inline:1rem}