.r6HEDW_main{width:100%;max-width:1200px;padding:var(--g-spacing-2) var(--g-spacing-4) 0;box-sizing:border-box;margin:0 auto}.r6HEDW_narrow{max-width:820px}.r6HEDW_crumbs{margin:0 0 var(--g-spacing-3);gap:0 var(--g-spacing-2);color:var(--g-color-text-secondary);flex-wrap:wrap;padding:0;font-size:14px;list-style:none;display:flex}.r6HEDW_crumbs li{align-items:center;min-height:32px;display:inline-flex}.r6HEDW_crumbs li+li:before{content:"/";margin-right:var(--g-spacing-2)}.r6HEDW_crumbs a{min-height:32px;color:inherit;text-underline-offset:3px;align-items:center;display:inline-flex}.r6HEDW_h1{margin:0 0 var(--g-spacing-3);letter-spacing:-.01em;text-wrap:balance;font-size:28px;font-weight:800;line-height:1.15}.r6HEDW_answer{margin:0 0 var(--g-spacing-4);max-width:68ch;font-size:17px;line-height:1.55}.r6HEDW_text{margin:0 0 var(--g-spacing-3);max-width:68ch;font-size:16px;line-height:1.6}.r6HEDW_h2{margin:var(--g-spacing-8) 0 var(--g-spacing-3);font-size:22px;font-weight:800;line-height:1.25}.r6HEDW_h3{margin:0;font-size:18px;font-weight:800;line-height:1.3}.r6HEDW_list{gap:var(--g-spacing-2);margin:0 0 var(--g-spacing-3);padding-left:var(--g-spacing-5);max-width:68ch;font-size:16px;line-height:1.55;display:grid}.r6HEDW_card{gap:var(--g-spacing-3);padding:var(--g-spacing-5);border-radius:var(--site-radius);background:var(--g-color-base-float);box-shadow:var(--site-shadow-soft);display:grid}.r6HEDW_cards{gap:var(--g-spacing-4);margin:var(--g-spacing-4) 0;display:grid}.r6HEDW_exerciseHead{align-items:baseline;gap:var(--g-spacing-1) var(--g-spacing-3);flex-wrap:wrap;display:flex}.r6HEDW_exerciseHead h2{margin:0;font-size:22px;font-weight:800;line-height:1.25}.r6HEDW_exerciseType{color:var(--g-color-text-secondary);font-size:14px}.r6HEDW_label{margin-right:var(--g-spacing-1);background:var(--g-color-base-generic);color:var(--g-color-text-secondary);border-radius:8px;padding:1px 8px;font-size:12px;font-weight:700;display:inline-block}.r6HEDW_buttons{gap:var(--g-spacing-3);flex-wrap:wrap;display:flex}.r6HEDW_buttons>*{flex:200px}.r6HEDW_pager{gap:var(--g-spacing-3);margin:var(--g-spacing-6) 0;flex-wrap:wrap;display:flex}.r6HEDW_module{margin:0 0 var(--g-spacing-5)}.r6HEDW_moduleTitle{margin:0 0 var(--g-spacing-2);font-size:18px;font-weight:800}.r6HEDW_pageGrid{gap:var(--g-spacing-2);grid-template-columns:repeat(auto-fill,minmax(64px,1fr));margin:0;padding:0;list-style:none;display:grid}.r6HEDW_pageLink{min-height:var(--brand-touch);padding:var(--g-spacing-1);border:1px solid var(--g-color-line-generic);background:var(--g-color-base-float);color:var(--g-color-text-primary);border-radius:16px;place-items:center;font-weight:700;text-decoration:none;display:grid}.r6HEDW_pageLink:hover{border-color:var(--g-color-line-brand);background:var(--g-color-base-selection)}.r6HEDW_bookCards{gap:var(--g-spacing-4);margin:var(--g-spacing-4) 0;display:grid}.r6HEDW_bookCards>.r6HEDW_card{align-content:start}.r6HEDW_bookCardHead{align-items:center;gap:var(--g-spacing-4);display:flex}.r6HEDW_bookCardHead .r6HEDW_h3{margin-bottom:var(--g-spacing-1)}.r6HEDW_bookCardHead .r6HEDW_text{margin:0}.r6HEDW_bookHead{align-items:center;gap:var(--g-spacing-5);margin-bottom:var(--g-spacing-3);display:flex}.r6HEDW_bookHead .r6HEDW_h1{margin:0}.r6HEDW_bookHeadCover{--book-w:56px!important}@media (min-width:720px){.r6HEDW_bookHeadCover{--book-w:84px!important}}.r6HEDW_muted{color:var(--g-color-text-secondary)}.r6HEDW_inlineLink{color:var(--g-color-text-link);text-underline-offset:3px}.r6HEDW_moduleList{gap:var(--g-spacing-2);flex-wrap:wrap;margin:0;padding:0;list-style:none;display:flex}.r6HEDW_moduleList a{min-height:36px;padding:0 var(--g-spacing-3);background:var(--g-color-base-generic);color:var(--g-color-text-primary);border-radius:999px;align-items:center;font-size:14px;font-weight:600;text-decoration:none;display:inline-flex}@media (min-width:640px){.r6HEDW_h1{font-size:36px}.r6HEDW_answer{font-size:18px}.r6HEDW_buttons>*{flex:none}.r6HEDW_bookCards{grid-template-columns:repeat(2,minmax(0,1fr))}}@media (min-width:960px){.r6HEDW_main{padding-inline:var(--g-spacing-6)}.r6HEDW_h1{font-size:48px}}
.g-color-text_color_primary{color:var(--g-color-text-primary)}.g-color-text_color_complementary{color:var(--g-color-text-complementary)}.g-color-text_color_secondary{color:var(--g-color-text-secondary)}.g-color-text_color_hint{color:var(--g-color-text-hint)}.g-color-text_color_info{color:var(--g-color-text-info)}.g-color-text_color_info-heavy{color:var(--g-color-text-info-heavy)}.g-color-text_color_positive{color:var(--g-color-text-positive)}.g-color-text_color_positive-heavy{color:var(--g-color-text-positive-heavy)}.g-color-text_color_warning{color:var(--g-color-text-warning)}.g-color-text_color_warning-heavy{color:var(--g-color-text-warning-heavy)}.g-color-text_color_danger{color:var(--g-color-text-danger)}.g-color-text_color_danger-heavy{color:var(--g-color-text-danger-heavy)}.g-color-text_color_utility{color:var(--g-color-text-utility)}.g-color-text_color_utility-heavy{color:var(--g-color-text-utility-heavy)}.g-color-text_color_misc{color:var(--g-color-text-misc)}.g-color-text_color_misc-heavy{color:var(--g-color-text-misc-heavy)}.g-color-text_color_brand{color:var(--g-color-text-brand)}.g-color-text_color_link{color:var(--g-color-text-link)}.g-color-text_color_link-hover{color:var(--g-color-text-link-hover)}.g-color-text_color_link-visited{color:var(--g-color-text-link-visited)}.g-color-text_color_link-visited-hover{color:var(--g-color-text-link-visited-hover)}.g-color-text_color_dark-primary{color:var(--g-color-text-dark-primary)}.g-color-text_color_dark-complementary{color:var(--g-color-text-dark-complementary)}.g-color-text_color_dark-secondary{color:var(--g-color-text-dark-secondary)}.g-color-text_color_light-primary{color:var(--g-color-text-light-primary)}.g-color-text_color_light-complementary{color:var(--g-color-text-light-complementary)}.g-color-text_color_light-secondary{color:var(--g-color-text-light-secondary)}.g-color-text_color_light-hint{color:var(--g-color-text-light-hint)}.g-color-text_color_inverted-primary{color:var(--g-color-text-inverted-primary)}.g-color-text_color_inverted-complementary{color:var(--g-color-text-inverted-complementary)}.g-color-text_color_inverted-secondary{color:var(--g-color-text-inverted-secondary)}.g-color-text_color_inverted-hint{color:var(--g-color-text-inverted-hint)}
.g-icon{vertical-align:top;line-height:0}
.g-button{--_--text-color:var(--g-color-text-primary);--_--text-color-hover:var(--_--text-color);--_--background-color:transparent;--_--background-color-hover:var(--g-color-base-simple-hover);--_--border-width:0;--_--border-color:currentColor;--_--focus-outline-color:var(--g-color-line-focus);--_--focus-outline-offset:0;--_--font-size:var(--g-text-body-1-font-size);font-family:var(--g-text-body-font-family);font-size:inherit;font-weight:var(--g-text-body-font-weight);color:var(--g-button-text-color,var(--_--text-color));cursor:pointer;box-sizing:border-box;height:var(--g-button-height,var(--_--height));line-height:var(--g-button-height,var(--_--height));font-size:var(--g-button-font-size,var(--_--font-size));-webkit-user-select:none;user-select:none;text-align:center;white-space:nowrap;touch-action:manipulation;-webkit-tap-highlight-color:#0000;padding:0;padding:0 var(--g-button-padding,var(--_--padding));justify-content:center;gap:var(--g-button-icon-offset,var(--_--icon-offset));background:0 0;border:none;outline:none;text-decoration:none;transition:transform .1s ease-out,color .15s linear;display:inline-flex;position:relative;overflow:visible;transform:scale(1)}.g-button:before{content:"";z-index:-1;background-color:var(--g-button-background-color,var(--_--background-color));border:var(--g-button-border-width,var(--_--border-width)) var(--g-button-border-style,solid) var(--g-button-border-color,var(--_--border-color));transition:background-color .15s linear;position:absolute;inset:0}.g-button:hover,.g-button[aria-haspopup][aria-expanded=true]{color:var(--g-button-text-color-hover,var(--_--text-color-hover))}.g-button:hover:before,.g-button[aria-haspopup][aria-expanded=true]:before{background-color:var(--g-button-background-color-hover,var(--_--background-color-hover))}.g-button:focus-visible:before{outline:var(--g-button-focus-outline-color,var(--_--focus-outline-color)) var(--g-button-focus-outline-style,solid) var(--g-button-focus-outline-width,2px);outline-offset:var(--g-button-focus-outline-offset,var(--_--focus-outline-offset))}.g-button:after{content:"";z-index:-1;transition:none;position:absolute;inset:0;transform:scale(1)}.g-button:active{transition:none;transform:scale(.96)}.g-button:active:after{transform:scale(1.042)}.g-button_size_xs{--_--height:20px;--_--border-radius:var(--g-border-radius-xs);--_--padding:6px;--_--icon-space:12px;--_--icon-offset:4px}.g-button_size_s{--_--height:24px;--_--border-radius:var(--g-border-radius-s);--_--padding:8px;--_--icon-space:16px;--_--icon-offset:4px}.g-button_size_m{--_--height:28px;--_--border-radius:var(--g-border-radius-m);--_--padding:12px;--_--icon-space:16px;--_--icon-offset:8px}.g-button_size_l{--_--height:36px;--_--border-radius:var(--g-border-radius-l);--_--padding:16px;--_--icon-space:16px;--_--icon-offset:8px}.g-button_size_xl{--_--height:44px;--_--border-radius:var(--g-border-radius-xl);--_--padding:24px;--_--icon-space:20px;--_--icon-offset:12px;--_--font-size:var(--g-text-body-2-font-size)}.g-button_view_normal{--_--background-color:var(--g-color-base-generic);--_--background-color-hover:var(--g-color-base-generic-hover)}.g-button_view_action{--_--text-color:var(--g-color-text-brand-contrast);--_--background-color:var(--g-color-base-brand);--_--background-color-hover:var(--g-color-base-brand-hover);--_--focus-outline-color:var(--g-color-base-brand);--_--focus-outline-offset:1px}.g-button_view_outlined{--_--border-width:1px;--_--border-color:var(--g-color-line-generic)}.g-button_view_outlined-info{--_--text-color:var(--g-color-text-info);--_--border-width:1px;--_--border-color:var(--g-color-line-info)}.g-button_view_outlined-success{--_--text-color:var(--g-color-text-positive);--_--border-width:1px;--_--border-color:var(--g-color-line-positive)}.g-button_view_outlined-warning{--_--text-color:var(--g-color-text-warning);--_--border-width:1px;--_--border-color:var(--g-color-line-warning)}.g-button_view_outlined-danger{--_--text-color:var(--g-color-text-danger);--_--border-width:1px;--_--border-color:var(--g-color-line-danger)}.g-button_view_outlined-utility{--_--text-color:var(--g-color-text-utility);--_--border-width:1px;--_--border-color:var(--g-color-line-utility)}.g-button_view_outlined-action{--_--text-color:var(--g-color-text-brand);--_--border-width:1px;--_--border-color:var(--g-color-line-brand)}.g-button_view_raised{--_--background-color:var(--g-color-base-float);--_--background-color-hover:var(--g-color-base-float-hover)}.g-button_view_raised:before{box-shadow:0 3px 5px var(--g-color-sfx-shadow)}.g-button_view_raised:active:before{box-shadow:0 1px 2px var(--g-color-sfx-shadow)}.g-button_view_flat-secondary{--_--text-color:var(--g-color-text-secondary);--_--text-color-hover:var(--g-color-text-primary)}.g-button_view_flat-info{--_--text-color:var(--g-color-text-info)}.g-button_view_flat-success{--_--text-color:var(--g-color-text-positive)}.g-button_view_flat-warning{--_--text-color:var(--g-color-text-warning)}.g-button_view_flat-danger{--_--text-color:var(--g-color-text-danger)}.g-button_view_flat-utility{--_--text-color:var(--g-color-text-utility)}.g-button_view_flat-action{--_--text-color:var(--g-color-text-brand)}.g-button_view_normal-contrast{--_--text-color:var(--g-color-text-dark-primary);--_--background-color:var(--g-color-base-light);--_--background-color-hover:var(--g-color-base-light-hover);--_--focus-outline-color:var(--g-color-line-light)}.g-button_view_normal-contrast.g-button_loading{--_--background-color-hover:var(--g-color-base-simple-hover)}.g-button_view_outlined-contrast{--_--text-color:var(--g-color-text-light-primary);--_--background-color-hover:var(--g-color-base-light-simple-hover);--_--border-width:1px;--_--border-color:var(--g-color-line-light);--_--focus-outline-color:var(--g-color-line-light)}.g-button_view_flat-contrast{--_--text-color:var(--g-color-text-light-primary);--_--background-color-hover:var(--g-color-base-light-simple-hover);--_--focus-outline-color:var(--g-color-line-light)}.g-button_pin_round-round:before{border-radius:var(--g-button-border-radius,var(--_--border-radius))}.g-button_pin_brick-brick:before{border-radius:0}.g-button_pin_clear-clear:before{border-inline:0;border-radius:0}.g-button_pin_circle-circle:before{border-radius:100px}.g-button_pin_round-brick:before{border-start-start-radius:var(--g-button-border-radius,var(--_--border-radius));border-start-end-radius:0;border-end-end-radius:0;border-end-start-radius:var(--g-button-border-radius,var(--_--border-radius))}.g-button_pin_brick-round:before{border-start-start-radius:0;border-start-end-radius:var(--g-button-border-radius,var(--_--border-radius));border-end-end-radius:var(--g-button-border-radius,var(--_--border-radius));border-end-start-radius:0}.g-button_pin_round-clear:before{border-inline-end:0;border-start-start-radius:var(--g-button-border-radius,var(--_--border-radius));border-start-end-radius:0;border-end-end-radius:0;border-end-start-radius:var(--g-button-border-radius,var(--_--border-radius))}.g-button_pin_clear-round:before{border-inline-start:0;border-start-start-radius:0;border-start-end-radius:var(--g-button-border-radius,var(--_--border-radius));border-end-end-radius:var(--g-button-border-radius,var(--_--border-radius));border-end-start-radius:0}.g-button_pin_brick-clear:before{border-inline-end:0;border-radius:0}.g-button_pin_clear-brick:before{border-inline-start:0;border-radius:0}.g-button_pin_circle-brick:before{border-start-start-radius:100px;border-start-end-radius:0;border-end-end-radius:0;border-end-start-radius:100px}.g-button_pin_brick-circle:before{border-start-start-radius:0;border-start-end-radius:100px;border-end-end-radius:100px;border-end-start-radius:0}.g-button_pin_circle-clear:before{border-inline-end:0;border-start-start-radius:100px;border-start-end-radius:0;border-end-end-radius:0;border-end-start-radius:100px}.g-button_pin_clear-circle:before{border-inline-start:0;border-start-start-radius:0;border-start-end-radius:100px;border-end-end-radius:100px;border-end-start-radius:0}.g-button_pin_round-round:after{border-radius:var(--g-button-border-radius,var(--_--border-radius))}.g-button_pin_brick-brick:after{border-radius:0}.g-button_pin_clear-clear:after{border-inline:0;border-radius:0}.g-button_pin_circle-circle:after{border-radius:100px}.g-button_pin_round-brick:after{border-start-start-radius:var(--g-button-border-radius,var(--_--border-radius));border-start-end-radius:0;border-end-end-radius:0;border-end-start-radius:var(--g-button-border-radius,var(--_--border-radius))}.g-button_pin_brick-round:after{border-start-start-radius:0;border-start-end-radius:var(--g-button-border-radius,var(--_--border-radius));border-end-end-radius:var(--g-button-border-radius,var(--_--border-radius));border-end-start-radius:0}.g-button_pin_round-clear:after{border-inline-end:0;border-start-start-radius:var(--g-button-border-radius,var(--_--border-radius));border-start-end-radius:0;border-end-end-radius:0;border-end-start-radius:var(--g-button-border-radius,var(--_--border-radius))}.g-button_pin_clear-round:after{border-inline-start:0;border-start-start-radius:0;border-start-end-radius:var(--g-button-border-radius,var(--_--border-radius));border-end-end-radius:var(--g-button-border-radius,var(--_--border-radius));border-end-start-radius:0}.g-button_pin_brick-clear:after{border-inline-end:0;border-radius:0}.g-button_pin_clear-brick:after{border-inline-start:0;border-radius:0}.g-button_pin_circle-brick:after{border-start-start-radius:100px;border-start-end-radius:0;border-end-end-radius:0;border-end-start-radius:100px}.g-button_pin_brick-circle:after{border-start-start-radius:0;border-start-end-radius:100px;border-end-end-radius:100px;border-end-start-radius:0}.g-button_pin_circle-clear:after{border-inline-end:0;border-start-start-radius:100px;border-start-end-radius:0;border-end-end-radius:0;border-end-start-radius:100px}.g-button_pin_clear-circle:after{border-inline-start:0;border-start-start-radius:0;border-start-end-radius:100px;border-end-end-radius:100px;border-end-start-radius:0}.g-button__text{white-space:nowrap;display:inline-block}.g-button__icon{margin:0 calc((var(--g-button-height,var(--_--height)) - var(--g-button-icon-space,var(--_--icon-space))) / 2 * -1);width:var(--g-button-height,var(--_--height));height:var(--g-button-height,var(--_--height));flex-shrink:0;display:inline-block;position:relative}.g-button__icon:after{content:" ";visibility:hidden}.g-button__icon-inner{justify-content:center;align-items:center;display:flex;position:absolute;inset:0}.g-button__icon_side_start{order:-1}.g-button__icon_side_end{order:1}.g-button__icon:only-child{margin:0}.g-button:has(.g-button__icon:only-child){--_--padding:0}.g-button:has(.g-button__icon:only-child):not(.g-button_width_max){width:var(--g-button-height,var(--_--height))}.g-button_selected:not(.g-button_view_outlined-contrast){--_--border-width:0}.g-button_selected:not(.g-button_view_normal-contrast,.g-button_view_flat-contrast,.g-button_view_outlined-contrast){--_--text-color:var(--g-color-text-brand-heavy);--_--background-color:var(--g-color-base-selection);--_--background-color-hover:var(--g-color-base-selection-hover)}.g-button_selected.g-button_view_flat-secondary{--_--text-color-hover:var(--g-color-text-brand-heavy)}.g-button_selected.g-button_view_outlined-info,.g-button_selected.g-button_view_flat-info{--_--text-color:var(--g-color-text-info-heavy);--_--background-color:var(--g-color-base-info-light);--_--background-color-hover:var(--g-color-base-info-light-hover)}.g-button_selected.g-button_view_outlined-success,.g-button_selected.g-button_view_flat-success{--_--text-color:var(--g-color-text-positive-heavy);--_--background-color:var(--g-color-base-positive-light);--_--background-color-hover:var(--g-color-base-positive-light-hover)}.g-button_selected.g-button_view_outlined-warning,.g-button_selected.g-button_view_flat-warning{--_--text-color:var(--g-color-text-warning-heavy);--_--background-color:var(--g-color-base-warning-light);--_--background-color-hover:var(--g-color-base-warning-light-hover)}.g-button_selected.g-button_view_outlined-danger,.g-button_selected.g-button_view_flat-danger{--_--text-color:var(--g-color-text-danger-heavy);--_--background-color:var(--g-color-base-danger-light);--_--background-color-hover:var(--g-color-base-danger-light-hover)}.g-button_selected.g-button_view_outlined-utility,.g-button_selected.g-button_view_flat-utility{--_--text-color:var(--g-color-text-utility-heavy);--_--background-color:var(--g-color-base-utility-light);--_--background-color-hover:var(--g-color-base-utility-light-hover)}.g-button_disabled{cursor:default;pointer-events:none}.g-button_disabled:not(.g-button_loading){--_--text-color:var(--g-color-text-hint);--_--background-color:var(--g-color-base-generic-accent-disabled);--_--background-color-hover:var(--g-color-base-generic-accent-disabled);--_--border-width:0}.g-button_disabled:not(.g-button_loading):is(.g-button_view_normal-contrast,.g-button_view_outlined-contrast){--_--text-color:var(--g-color-text-light-secondary);--_--background-color:var(--g-color-base-light-disabled);--_--background-color-hover:var(--g-color-base-light-disabled)}.g-button_disabled:not(.g-button_loading):is(.g-button_view_flat,.g-button_view_flat-secondary,.g-button_view_flat-info,.g-button_view_flat-success,.g-button_view_flat-warning,.g-button_view_flat-danger,.g-button_view_flat-utility,.g-button_view_flat-action,.g-button_view_flat-contrast){--_--text-color:var(--g-color-text-hint);--_--background-color:transparent;--_--background-color-hover:transparent}.g-button_disabled:not(.g-button_loading).g-button_view_flat-contrast{--_--text-color:var(--g-color-text-light-hint)}.g-button_disabled:active{transform:scale(1)}.g-button_loading:before{background-image:repeating-linear-gradient(-45deg, var(--g-button-background-color,var(--_--background-color)), var(--g-button-background-color,var(--_--background-color)) 4px, var(--g-button-background-color-hover,var(--_--background-color-hover)) 4px, var(--g-button-background-color-hover,var(--_--background-color-hover)) 8px);background-size:150%;background-clip:padding-box;animation:.5s linear infinite g-loading-animation}@media (prefers-reduced-motion:reduce){.g-button_loading:before{animation:none}}.g-button_width_auto{max-width:100%}.g-button_width_max{width:100%}.g-button_width_auto .g-button__text,.g-button_width_max .g-button__text{text-overflow:ellipsis;display:block;overflow:hidden}
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