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.devsite-nav-heading>.devsite-nav-title-no-path:hover{color:#1a73e8;color:var(--devsite-nav-title-no-path-color-hover,#1a73e8)}devsite-book-nav .devsite-nav-accordion+.devsite-nav-item:not(.devsite-nav-accordion):not(.devsite-nav-divider),devsite-book-nav .devsite-nav-divider+.devsite-nav-item:not(.devsite-nav-accordion):not(.devsite-nav-divider),devsite-book-nav .devsite-nav-item:not(.devsite-nav-accordion):not(.devsite-nav-divider)+.devsite-nav-accordion,devsite-book-nav .devsite-nav-item:not(.devsite-nav-accordion):not(.devsite-nav-divider)+.devsite-nav-divider{margin-top:12px}devsite-book-nav .devsite-nav-break{height:24px}#devsite-hamburger-menu,#devsite-hamburger-menu[visually-hidden],devsite-book-nav .devsite-mobile-header,devsite-book-nav .devsite-mobile-nav-top{display:none}devsite-book-nav .devsite-mobile-header{background:#fff;background:var(--devsite-header-color-upper,#fff);border-bottom:1px solid #dadce0;border-bottom:var(--devsite-header-border,1px solid #dadce0)}#devsite-hamburger-menu:before,devsite-book-nav #devsite-close-nav:before{border-radius:50%;padding:8px;-webkit-transition:background .2s;transition:background .2s}#devsite-hamburger-menu:focus:before,#devsite-hamburger-menu:hover:before,devsite-book-nav #devsite-close-nav:focus:before,devsite-book-nav #devsite-close-nav:hover:before{background:#f1f3f4}#devsite-hamburger-menu:before{content:"menu"}[dir=ltr] devsite-book-nav #devsite-close-nav:before{content:"arrow_back"}[dir=rtl] devsite-book-nav #devsite-close-nav:before{content:"arrow_forward"}devsite-book-nav[top-level-nav] #devsite-close-nav:before{content:"close"}@media screen and (max-width:840px){devsite-book-nav{display:none;height:100vh;max-height:100vh!important;top:0!important;-webkit-transition:-webkit-transform .2s cubic-bezier(.4,0,.2,1);transition:-webkit-transform .2s cubic-bezier(.4,0,.2,1);transition:transform .2s cubic-bezier(.4,0,.2,1);transition:transform .2s cubic-bezier(.4,0,.2,1),-webkit-transform .2s 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#devsite-hamburger-menu{margin:0 -4px 0 8px}devsite-book-nav #devsite-close-nav{color:#5f6368;-webkit-flex-shrink:0;-ms-flex-negative:0;flex-shrink:0}[dir=ltr] devsite-book-nav #devsite-close-nav{margin:0 0 0 -12px}[dir=rtl] devsite-book-nav #devsite-close-nav{margin:0 -12px 0 0}devsite-book-nav .devsite-mobile-nav-top{display:block}devsite-book-nav .devsite-book-nav-wrapper{display:-webkit-box;display:-webkit-flex;display:-moz-box;display:-ms-flexbox;display:flex;-webkit-transition:-webkit-transform .2s cubic-bezier(.4,0,.2,1);transition:-webkit-transform .2s cubic-bezier(.4,0,.2,1);transition:transform .2s cubic-bezier(.4,0,.2,1);transition:transform .2s cubic-bezier(.4,0,.2,1),-webkit-transform .2s cubic-bezier(.4,0,.2,1)}[dir=ltr] devsite-book-nav .devsite-book-nav-wrapper{-webkit-transform:translate3d(-268px,0,0)!important;transform:translate3d(-268px,0,0)!important}[dir=rtl] devsite-book-nav .devsite-book-nav-wrapper{-webkit-transform:translate3d(268px,0,0)!important;transform:translate3d(268px,0,0)!important}devsite-book-nav:not([animatable]) .devsite-book-nav-wrapper{-webkit-transition:-webkit-transform 1ms;transition:-webkit-transform 1ms;transition:transform 1ms;transition:transform 1ms,-webkit-transform 1ms}devsite-book-nav .devsite-nav-list{padding-bottom:120px}devsite-book-nav .devsite-nav-list>.devsite-nav-item:not(.devsite-nav-accordion):not(.devsite-nav-divider):first-child{margin-top:0}devsite-book-nav .devsite-mobile-nav-bottom .devsite-nav-list>.devsite-nav-item:not(.devsite-nav-accordion):not(.devsite-nav-divider):first-child{margin-top:13px}devsite-book-nav .devsite-mobile-nav-top .devsite-nav-text{-webkit-box-flex:1;-webkit-flex-grow:1;-moz-box-flex:1;-ms-flex-positive:1;flex-grow:1}devsite-book-nav[top-level-nav] .devsite-book-nav-wrapper{-webkit-transform:translateZ(0)!important;transform:translateZ(0)!important}devsite-book-nav:not([top-level-nav]) .devsite-mobile-nav-top,devsite-book-nav[top-level-nav] .devsite-mobile-nav-bottom{height:calc(100vh - 64px);overflow:hidden}devsite-book-nav .devsite-mobile-nav-top>.devsite-nav-list>.devsite-nav-item{border-bottom:1px solid #dadce0}devsite-book-nav .devsite-mobile-nav-top>.devsite-nav-list>.devsite-nav-item>.devsite-nav-title{font-weight:700;padding-bottom:15px;padding-top:16px}devsite-book-nav .devsite-mobile-nav-top>.devsite-nav-list>.devsite-nav-item>.devsite-nav-active{background:0}devsite-book-nav .devsite-mobile-nav-top>.devsite-nav-list>.devsite-nav-item>.devsite-nav-title:not(.devsite-nav-active){color:#5f6368}devsite-book-nav .devsite-mobile-nav-top>.devsite-nav-list>.devsite-nav-item:not(.devsite-nav-accordion):not(.devsite-nav-heading)>.devsite-nav-title{border-radius:0}devsite-book-nav .devsite-mobile-nav-top>.devsite-nav-list>.devsite-nav-item:not(.devsite-nav-accordion):not(.devsite-nav-heading)>.devsite-nav-title:focus,devsite-book-nav .devsite-mobile-nav-top>.devsite-nav-list>.devsite-nav-item:not(.devsite-nav-accordion):not(.devsite-nav-heading)>.devsite-nav-title:hover{background:0}devsite-book-nav .devsite-mobile-nav-bottom,devsite-book-nav .devsite-mobile-nav-top{-webkit-flex-shrink:0;-ms-flex-negative:0;flex-shrink:0;width:268px}devsite-book-nav .devsite-mobile-header{-webkit-box-align:center;-webkit-align-items:center;-moz-box-align:center;-ms-flex-align:center;align-items:center;display:-webkit-box;display:-webkit-flex;display:-moz-box;display:-ms-flexbox;display:flex;height:48px;padding:0 16px;position:relative}devsite-book-nav .devsite-mobile-header .devsite-nav-active{font-weight:400}devsite-book-nav .devsite-nav-responsive-tabs{margin-bottom:12px;margin-top:-11px}devsite-book-nav .devsite-lower-tab-item{margin:0}devsite-book-nav .devsite-nav-responsive-tabs>.devsite-nav-item:last-child{margin-bottom:8px}}@media screen and (max-width:600px){#devsite-hamburger-menu,devsite-book-nav #devsite-close-nav{margin:0 4px 0 -12px}}devsite-book-nav .devsite-product-id-row{padding:20px 24px 2px;padding:var(--devsite-product-id-row-padding,20px 24px 2px);-webkit-box-align:center;-webkit-align-items:center;-moz-box-align:center;-ms-flex-align:center;align-items:center;display:-webkit-box;display:-webkit-flex;display:-moz-box;display:-ms-flexbox;display:flex;-webkit-box-pack:justify;-webkit-justify-content:space-between;-moz-box-pack:justify;-ms-flex-pack:justify;justify-content:space-between;min-height:60px}devsite-book-nav .devsite-header-no-lower-tabs .devsite-product-id-row{padding:20px 24px;padding:var(--devsite-product-id-row-padding,20px 24px);min-height:72px}devsite-book-nav .devsite-product-description-row{color:#fff;color:var(--devsite-header-foreground-lower-description,var(--devsite-header-foreground-lower-hover,#fff));font:400 20px/32px Roboto,Noto Sans,Noto Sans JP,Noto Sans KR,Noto Naskh Arabic,Noto Sans Thai,Noto Sans Hebrew,Noto Sans 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devsite-book-nav .devsite-product-description,devsite-book-nav .devsite-product-description{margin:0}}@media screen and (max-width:600px){devsite-book-nav .devsite-header-no-lower-tabs .devsite-product-id-row,devsite-book-nav .devsite-product-id-row{padding:20px 16px;padding:var(--devsite-product-id-row-padding,20px 16px);-webkit-flex-wrap:wrap;-ms-flex-wrap:wrap;flex-wrap:wrap}devsite-book-nav .devsite-product-button-row{-webkit-flex-basis:100%;-ms-flex-preferred-size:100%;flex-basis:100%;margin:16px 0 0}}devsite-book-nav .devsite-product-name-wrapper{-ms-flex-align:center;-webkit-box-flex:0;-webkit-flex:0 0 auto;-moz-box-flex:0;-ms-flex:0 0 auto;flex:0 0 auto;height:36px;margin:6px 0}devsite-book-nav .devsite-product-name-link,devsite-book-nav .devsite-product-name-wrapper,devsite-book-nav 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.devsite-googler-cache[active]:focus{background:#ee675c}devsite-googler-buttons .devsite-googler-cache:before{color:#fff;content:"cached"}devsite-googler-buttons .devsite-googler-cache[active]:after{background:#fff;border-bottom:2px solid #d93025;content:"";display:block;height:4px;position:absolute;-webkit-transform:rotate(45deg) translateY(1px);transform:rotate(45deg) translateY(1px);width:28px}devsite-googler-buttons .devsite-googler-cache[active]:active:after,devsite-googler-buttons .devsite-googler-cache[active]:focus:after{border-color:#ee675c}devsite-googler-buttons .devsite-googler-devrel:before{color:#607d8b;content:"build"}devsite-googler-buttons .devsite-googler-edit:before{color:#689f38;content:"edit"}devsite-googler-buttons .devsite-googler-env:before{color:#1e88e5;content:"swap_horiz"}devsite-googler-buttons .devsite-googler-speed-dial{display:-webkit-box;display:-webkit-flex;display:-moz-box;display:-ms-flexbox;display:flex;box-shadow:0 1px 3px 0 rgba(60,64,67,.3),0 4px 8px 3px rgba(60,64,67,.15);height:56px;margin:0;width:56px}devsite-googler-buttons[active] .devsite-googler-speed-dial{margin:16px 0 0}devsite-googler-buttons .devsite-googler-speed-dial:before{content:url(../../images/fab.svg);-webkit-transition:-webkit-transform .2s;transition:-webkit-transform .2s;transition:transform .2s;transition:transform .2s,-webkit-transform .2s}devsite-googler-buttons[active] .devsite-googler-speed-dial:before{content:"close";-webkit-transform:rotate(90deg);transform:rotate(90deg)}devsite-header{display:block;position:relative;z-index:1006}body[ready] devsite-header[fixed]{contain:layout;pointer-events:none;position:fixed;top:0;width:100%}devsite-header .devsite-top-logo-row-wrapper-wrapper{border-bottom:0;border-bottom:var(--devsite-header-border,0);position:relative;z-index:1}devsite-header .devsite-top-logo-row-wrapper-wrapper,devsite-header 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auto;height:24px;min-width:24px;padding:0;-webkit-transition:color .2s;transition:color .2s;width:24px}devsite-header .devsite-header-icon-button:active,devsite-header .devsite-header-icon-button:focus,devsite-header .devsite-header-icon-button:hover{color:rgba(0,0,0,.87);color:var(--devsite-header-icon-color-active,rgba(0,0,0,.87))}devsite-header .devsite-top-logo-row-middle{-webkit-box-align:center;-webkit-align-items:center;-moz-box-align:center;-ms-flex-align:center;align-items:center;display:-webkit-box;display:-webkit-flex;display:-moz-box;display:-ms-flexbox;display:flex;-webkit-box-flex:1;-webkit-flex-grow:1;-moz-box-flex:1;-ms-flex-positive:1;flex-grow:1;position:relative}devsite-header .devsite-collapsible-section{background-color:#5f6368;background-color:var(--devsite-header-color-lower,var(--devsite-primary-color,#5f6368))}@media screen and (max-width:840px){devsite-header{-webkit-transform:translateZ(0);transform:translateZ(0)}devsite-header .devsite-top-logo-row{padding:0 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.devsite-header-billboard-search{margin:0 24px}}devsite-header .devsite-doc-set-nav-row{border-bottom:none;border-bottom:var(--devsite-header-lower-tabs-border-bottom,none);-webkit-box-align:center;-webkit-align-items:center;-moz-box-align:center;-ms-flex-align:center;align-items:center;display:-webkit-box;display:-webkit-flex;display:-moz-box;display:-ms-flexbox;display:flex;-webkit-box-pack:justify;-webkit-justify-content:space-between;-moz-box-pack:justify;-ms-flex-pack:justify;justify-content:space-between;min-height:48px;padding:0 24px 0 0}[dir=rtl] devsite-header .devsite-doc-set-nav-row{padding:0 0 0 24px}[dir=ltr] devsite-header .devsite-doc-set-nav-row .devsite-breadcrumb-list{padding-left:24px}[dir=rtl] devsite-header .devsite-doc-set-nav-row .devsite-breadcrumb-list{padding-right:24px}@media screen and (max-width:840px){devsite-header .devsite-doc-set-nav-row{display:none}}devsite-header devsite-language-selector{margin:0 0 0 16px}[dir=rtl] devsite-header 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.devsite-searchbox{width:100%}devsite-header devsite-search[search-active] .devsite-search-form{border-radius:0;border-radius:var(--devsite-search-border-radius,0);box-shadow:none;box-shadow:var(--devsite-search-active-box-shadow,none);overflow:visible;overflow:var(--devsite-search-active-overflow,visible);position:relative;position:var(--devsite-search-form-position,relative);left:0;top:0}[dir=ltr] devsite-header devsite-search[search-active] .devsite-search-form{right:auto;right:var(--devsite-search-form-position-end,auto)}[dir=rtl] devsite-header devsite-search[search-active] .devsite-search-form{left:auto;left:var(--devsite-search-form-position-end,auto)}devsite-header devsite-search[search-active] .devsite-search-field,devsite-header devsite-search[search-active] .devsite-search-field:hover{background:#f1f3f4;background:var(--devsite-search-form-background-active,#f1f3f4);color:#202124;color:var(--devsite-search-form-text-active,#202124)}[dir=ltr] devsite-header .devsite-header-billboard-search devsite-search[search-active] .devsite-search-form{right:auto;right:var(--devsite-search-form-position-start,auto)}[dir=rtl] devsite-header .devsite-header-billboard-search devsite-search[search-active] .devsite-search-form{left:auto;left:var(--devsite-search-form-position-start,auto)}devsite-header .devsite-top-logo-row devsite-search[search-active] .devsite-searchbox .devsite-search-image{display:-webkit-box;display:-webkit-flex;display:-moz-box;display:-ms-flexbox;display:flex}devsite-header .devsite-top-logo-row devsite-search .devsite-searchbox:before,devsite-header .devsite-top-logo-row devsite-search[search-active] .devsite-popout{width:calc(100vw + 16px);width:var(--devsite-popout-width,calc(100vw + 16px))}[dir=ltr] devsite-header .devsite-top-logo-row devsite-search .devsite-searchbox:before,[dir=ltr] devsite-header .devsite-top-logo-row devsite-search[search-active] 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cubic-bezier(0,0,.2,1),-webkit-transform .16s cubic-bezier(0,0,.2,1);padding:7px;background:#fff}devsite-playlist .devsite-playlist--header .devsite-playlist--header-badge-info .devsite-playlist--progress-bar--outer,devsite-playlist .devsite-playlist--header .devsite-playlist--header-badge-info .devsite-playlist--progress-text,devsite-playlist .devsite-playlist--header .devsite-playlist--header-badge-info .devsite-playlist-badge-details-action,devsite-playlist .devsite-playlist--header .devsite-playlist--header-badge-info .devsite-playlist-badge-details-icon img,devsite-playlist .devsite-playlist--header .devsite-playlist--header-badge-info .devsite-playlist-badge-details-subtext{position:relative;z-index:2;opacity:1;-webkit-transition:opacity .16s cubic-bezier(.4,0,1,1),-webkit-transform .16s cubic-bezier(.4,0,1,1);transition:opacity .16s cubic-bezier(.4,0,1,1),-webkit-transform .16s cubic-bezier(.4,0,1,1);transition:transform .16s cubic-bezier(.4,0,1,1),opacity .16s cubic-bezier(.4,0,1,1);transition:transform .16s cubic-bezier(.4,0,1,1),opacity .16s cubic-bezier(.4,0,1,1),-webkit-transform .16s cubic-bezier(.4,0,1,1)}devsite-playlist .devsite-playlist--header .devsite-playlist--header-badge-info .devsite-playlist-badge-sharing{margin:12px -16px -16px;display:-webkit-box;display:-webkit-flex;display:-moz-box;display:-ms-flexbox;display:flex;-webkit-box-pack:justify;-webkit-justify-content:space-between;-moz-box-pack:justify;-ms-flex-pack:justify;justify-content:space-between;-webkit-box-align:center;-webkit-align-items:center;-moz-box-align:center;-ms-flex-align:center;align-items:center;border-top:1px solid #dadce0;padding:8px 0 8px 12px}devsite-playlist .devsite-playlist--header .devsite-playlist--header-badge-info .devsite-playlist-badge-sharing 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.devsite-playlist--header-badge-info .devsite-playlist-badge-details-icon devsite-spinner{position:absolute;opacity:0;-webkit-transition:opacity .16s cubic-bezier(.4,0,1,1);transition:opacity .16s cubic-bezier(.4,0,1,1)}devsite-playlist .devsite-playlist--header .devsite-playlist--header-badge-info .devsite-playlist--progress-text{font-size:16px;font-weight:500;line-height:20px;text-align:center;color:#202124}devsite-playlist .devsite-playlist--header .devsite-playlist--header-badge-info .devsite-playlist--progress-bar{-webkit-transition:opacity .16s cubic-bezier(.4,0,1,1);transition:opacity .16s cubic-bezier(.4,0,1,1)}devsite-playlist .devsite-playlist--header .devsite-playlist--header-badge-info .devsite-playlist--progress-bar.hide{opacity:0}devsite-playlist .devsite-playlist--header .devsite-playlist--header-badge-info .devsite-playlist--progress-bar--outer{margin:14px 0 0;height:10px;border-radius:24px;background:#e8f0fe;position:relative}devsite-playlist .devsite-playlist--header 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.devsite-playlist-badge-details-subtext{padding:0 0 12px}devsite-playlist .devsite-playlist--header .devsite-playlist--header-badge-info.not-eligible .devsite-playlist--progress-bar,devsite-playlist .devsite-playlist--header .devsite-playlist--header-badge-info.not-eligible .devsite-playlist--progress-text{display:none}devsite-playlist .devsite-playlist--header .devsite-playlist--header-badge-info.not-eligible.no-badge .devsite-playlist-badge-details-subtext{padding-top:0}devsite-playlist .devsite-playlist--header .devsite-playlist--header-badge-info.loading{pointer-events:none}devsite-playlist .devsite-playlist--header .devsite-playlist--header-badge-info.loading .devsite-playlist-badge-details-icon-container{position:absolute;top:0;right:0;left:0;bottom:0;margin-bottom:0}devsite-playlist .devsite-playlist--header .devsite-playlist--header-badge-info.loading .devsite-playlist-badge-details-icon{-webkit-transform:translateZ(0);transform:translateZ(0);background:transparent}devsite-playlist .devsite-playlist--header .devsite-playlist--header-badge-info.loading .devsite-playlist--progress-bar--outer,devsite-playlist .devsite-playlist--header .devsite-playlist--header-badge-info.loading .devsite-playlist--progress-text,devsite-playlist .devsite-playlist--header .devsite-playlist--header-badge-info.loading .devsite-playlist-badge-details-action,devsite-playlist .devsite-playlist--header .devsite-playlist--header-badge-info.loading .devsite-playlist-badge-details-subtext{opacity:0}devsite-playlist .devsite-playlist--header .devsite-playlist--header-badge-info.loading .devsite-playlist-badge-details-icon img{opacity:0;position:absolute}devsite-playlist .devsite-playlist--header .devsite-playlist--header-badge-info.loading .devsite-playlist-badge-details-icon devsite-spinner{opacity:1}devsite-playlist .devsite-playlist--header h1:first-of-type{margin:0;top:0;color:#fff;font-family:Roboto,Noto Sans,Noto Sans JP,Noto Sans KR,Noto Naskh Arabic,Noto Sans Thai,Noto Sans Hebrew,Noto Sans Bengali,sans-serif;font-style:normal;font-weight:300;font-size:34px;line-height:34px}devsite-playlist .devsite-playlist--header .devsite-playlist-details{font-size:12px;color:#3c4043;line-height:16px}devsite-playlist .devsite-playlist--header p{margin:22px 0;padding:0;font-size:16px;line-height:24px;font-family:Roboto,Noto Sans,Noto Sans JP,Noto Sans KR,Noto Naskh Arabic,Noto Sans Thai,Noto Sans Hebrew,Noto Sans Bengali,sans-serif;color:#dadce0}devsite-playlist .devsite-playlist--header .devsite-playlist-return-button{margin-top:24px}devsite-playlist .devsite-playlist--header .devsite-playlist-summary{display:-webkit-box;display:-webkit-flex;display:-moz-box;display:-ms-flexbox;display:flex;font-family:Roboto,Noto Sans,Noto Sans JP,Noto Sans KR,Noto Naskh Arabic,Noto Sans Thai,Noto Sans Hebrew,Noto Sans Bengali,sans-serif;font-style:normal;font-weight:700;font-size:12px;line-height:24px;color:#fff}devsite-playlist .devsite-playlist--header .devsite-playlist-badge-details{width:100%;max-width:213px;height:auto;background:#fff;border-radius:8px;padding:16px}devsite-playlist .profile-notification{display:-webkit-box;display:-webkit-flex;display:-moz-box;display:-ms-flexbox;display:flex;-webkit-box-align:center;-webkit-align-items:center;-moz-box-align:center;-ms-flex-align:center;align-items:center;-webkit-box-pack:center;-webkit-justify-content:center;-moz-box-pack:center;-ms-flex-pack:center;justify-content:center}devsite-playlist .profile-notification .profile-notification--inner{color:#5f6368;margin:0 auto;padding:16px;box-shadow:0 1px 2px 0 rgba(60,64,67,.3),0 2px 6px 2px rgba(60,64,67,.15);border-radius:4px}devsite-playlist .devsite-playlist--section{padding:24px 0;position:relative}devsite-playlist .devsite-playlist--section .arrow--up,devsite-playlist[not-signed-in] .devsite-playlist--item--meta em,devsite-playlist[not-signed-in] .devsite-playlist--section .playlist-skip{display:none}devsite-playlist .devsite-playlist--item-top{display:-webkit-box;display:-webkit-flex;display:-moz-box;display:-ms-flexbox;display:flex}devsite-playlist .devsite-playlist--item-top:before{position:absolute;width:1px;height:0;background:#dadce0;content:"";display:block;margin-left:15px;margin-top:2px;top:54px;z-index:1;-webkit-transition:height .16s cubic-bezier(.4,0,1,1),opacity .16s cubic-bezier(.4,0,1,1);transition:height .16s cubic-bezier(.4,0,1,1),opacity .16s cubic-bezier(.4,0,1,1)}devsite-playlist .devsite-playlist--item-top .devsite-playlist--item-top-index{-webkit-box-flex:0;-webkit-flex-grow:0;-moz-box-flex:0;-ms-flex-positive:0;flex-grow:0;-webkit-flex-shrink:0;-ms-flex-negative:0;flex-shrink:0;width:30px;position:relative}devsite-playlist .devsite-playlist--item-top .devsite-playlist--item-top-index span{display:-webkit-box;display:-webkit-flex;display:-moz-box;display:-ms-flexbox;display:flex;-webkit-box-align:center;-webkit-align-items:center;-moz-box-align:center;-ms-flex-align:center;align-items:center;-webkit-box-pack:center;-webkit-justify-content:center;-moz-box-pack:center;-ms-flex-pack:center;justify-content:center;width:30px;height:30px;border-radius:50%;background:#202124;color:#fff;margin-top:2px;opacity:1}devsite-playlist .devsite-playlist--item-top .devsite-playlist--item-top-index i{opacity:0;-webkit-transform:rotate(45deg);transform:rotate(45deg);color:#009231;width:36px;height:36px;font-size:36px;position:absolute;left:-3px;top:-1px}devsite-playlist .devsite-playlist--item-top .devsite-playlist--item-top-index devsite-spinner{position:absolute;top:2px;opacity:0}devsite-playlist .devsite-playlist--item-top .devsite-playlist--item-top-index devsite-spinner,devsite-playlist .devsite-playlist--item-top .devsite-playlist--item-top-index i,devsite-playlist 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.material-icons{top:auto;position:static;margin:0;width:24px;height:24px;font-size:24px;cursor:pointer}devsite-playlist .devsite-playlist--item-top .devsite-playlist--item-top-title{-webkit-box-flex:1;-webkit-flex-grow:1;-moz-box-flex:1;-ms-flex-positive:1;flex-grow:1;padding:0 18px;cursor:pointer}devsite-playlist .devsite-playlist--item-top .devsite-playlist--item-top-title h2{margin:0;padding:0;font-size:28px;color:#202124;line-height:36px}devsite-playlist .devsite-playlist--item--content,devsite-playlist .devsite-playlist--item--meta{padding:0 48px}devsite-playlist .devsite-playlist--item--meta{font-size:12px;color:#3c4043;line-height:16px;display:-webkit-box;display:-webkit-flex;display:-moz-box;display:-ms-flexbox;display:flex;-webkit-box-align:center;-webkit-align-items:center;-moz-box-align:center;-ms-flex-align:center;align-items:center;margin:4px 0}devsite-playlist .devsite-playlist--item--meta em{padding-left:16px}devsite-playlist .devsite-playlist--item--meta .material-icons{font-size:18px;width:18px;height:18px;margin-right:4px}devsite-playlist .devsite-playlist--item--actions,devsite-playlist .devsite-playlist--item--content{display:none}devsite-playlist .devsite-playlist--item--actions{-webkit-box-align:center;-webkit-align-items:center;-moz-box-align:center;-ms-flex-align:center;align-items:center;-webkit-box-pack:end;-webkit-justify-content:flex-end;-moz-box-pack:end;-ms-flex-pack:end;justify-content:flex-end;padding:8px 0 32px 48px}devsite-playlist .devsite-playlist--section[ready] .devsite-playlist--item-top:before{height:calc(100% - 30px)}devsite-playlist .devsite-playlist--section[expanded]{background:#f5f5f7 url(../images/playlist_active.svg) repeat-x top}devsite-playlist .devsite-playlist--section[expanded] .arrow--down{display:none}devsite-playlist .devsite-playlist--section[expanded] .arrow--up{display:block}devsite-playlist .devsite-playlist--section[expanded] .devsite-playlist--item-top-index span{background:#0070f0}devsite-playlist .devsite-playlist--section[expanded] .devsite-playlist--item--content{display:block}devsite-playlist .devsite-playlist--section[expanded] .devsite-playlist--item--actions{display:-webkit-box;display:-webkit-flex;display:-moz-box;display:-ms-flexbox;display:flex}devsite-playlist .devsite-playlist--section[type=game] .devsite-playlist--item--content,devsite-playlist .devsite-playlist--section[type=video] .devsite-playlist--item--content{padding:12px 48px}devsite-playlist .devsite-playlist--section[completing] .devsite-playlist--item-top-index devsite-spinner{opacity:1}devsite-playlist .devsite-playlist--section[completed] .devsite-playlist--item-top-index span{opacity:0}devsite-playlist .devsite-playlist--section[completed] .devsite-playlist--item-top-index i{opacity:1;-webkit-transform:rotate(0);transform:rotate(0)}devsite-playlist .devsite-playlist--section[completed] .playlist-skip{display:none}devsite-playlist 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rgba(60,64,67,.15);box-shadow:var(--devsite-popout-box-shadow,0 1px 2px 0 rgba(60,64,67,.3),0 2px 6px 2px rgba(60,64,67,.15));background:#fff;max-height:calc(100vh - 56px);overflow-y:auto}devsite-search .devsite-popout-result:empty,devsite-search[search-active][no-suggest] .devsite-popout{display:none}devsite-search .devsite-suggest-wrapper{padding:16px 0 0;font-size:14px}devsite-search .devsite-result-item,devsite-search .devsite-result-label{font:13px/20px Roboto,Noto Sans,Noto Sans JP,Noto Sans KR,Noto Naskh Arabic,Noto Sans Thai,Noto Sans Hebrew,Noto Sans Bengali,sans-serif;margin:0}devsite-search .devsite-result-label{padding-left:40px}[dir=rtl] devsite-search .devsite-result-label{padding-left:0;padding-right:40px}devsite-search .devsite-result-item a{color:#202124;display:block;outline:0;padding:8px;text-decoration:none;-webkit-transition:background .2s;transition:background .2s;will-change:transition}[dir=ltr] devsite-search .devsite-result-item a{padding-left:40px}[dir=rtl] 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devsite-search[compact][search-active] .devsite-search-image{left:8px;right:auto}[dir=rtl] devsite-search[compact][search-active] .devsite-search-image{right:8px;left:auto}devsite-search[compact][search-active] input.devsite-search-field{width:100%}@media screen and (max-width:840px){devsite-search input.devsite-search-field{padding-left:40px}[dir=rtl] devsite-search input.devsite-search-field{padding-left:0;padding-right:40px}.devsite-search-background,.devsite-search-background:after,[search-active] .devsite-search-background:after,devsite-search .devsite-search-field,devsite-search .devsite-search-field:hover{-webkit-transition:none;transition:none}devsite-search .devsite-search-image{left:8px}[dir=rtl] devsite-search .devsite-search-image{left:auto;right:8px}devsite-header 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#e8eaed);border-radius:2px;border-radius:var(--devsite-select-border-radius,2px);box-shadow:none;color:#202124;cursor:pointer;display:inline-block;font:500 14px/36px Roboto,Noto Sans,Noto Sans JP,Noto Sans KR,Noto Naskh Arabic,Noto Sans Thai,Noto Sans Hebrew,Noto Sans Bengali,sans-serif;font:var(--devsite-select-font,500 14px/36px Roboto,Noto Sans,Noto Sans JP,Noto Sans KR,Noto Naskh Arabic,Noto Sans Thai,Noto Sans Hebrew,Noto Sans Bengali,sans-serif);height:36px;line-height:34px;max-width:340px;min-width:72px;outline:0;overflow:hidden;padding:0 27px 0 7px;padding:var(--devsite-select-padding,0 27px 0 7px);text-align:left;text-indent:.01px;text-overflow:ellipsis;-webkit-transition:background-color .2s;transition:background-color .2s;vertical-align:middle;white-space:nowrap}devsite-select .devsite-select-toggle:focus,devsite-select .devsite-select-toggle:hover{background-color:#f1f3f4}devsite-select .devsite-select-toggle:active{background-color:#e8eaed}devsite-select 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devsite-tabs{display:none}devsite-selector devsite-tabs[connected]{border-bottom:1px solid #e8eaed;border-bottom:var(--devsite-border,1px solid #e8eaed);display:-webkit-box;display:-webkit-flex;display:-moz-box;display:-ms-flexbox;display:flex}devsite-selector devsite-tabs tab a{cursor:pointer;display:inline-block;-webkit-flex-shrink:0;-ms-flex-negative:0;flex-shrink:0;line-height:48px;margin:0;max-width:200px;overflow:hidden;text-align:center;text-overflow:ellipsis;-webkit-transition:color .2s;transition:color .2s;white-space:nowrap}devsite-selector devsite-tabs tab a,devsite-selector devsite-tabs tab a:link,devsite-selector devsite-tabs tab a:visited{color:#5f6368}devsite-selector devsite-tabs tab a:focus,devsite-selector devsite-tabs tab a:hover{color:#1a73e8;color:var(--devsite-link-hover,#1a73e8)}@media screen and (-ms-high-contrast:active){devsite-selector devsite-tabs tab[active] a{font-weight:700;text-decoration:underline}}devsite-selector devsite-tabs tab[active] a:link,devsite-selector devsite-tabs tab[active] a:visited{color:#1a73e8}devsite-selector devsite-tabs>div>tab[tab] a:focus:after,devsite-selector devsite-tabs>div>tab[tab] a:hover:after{background:0;background:var(--devsite-marker-background,0)}devsite-selector devsite-tabs>div>tab[active] a:after,devsite-selector devsite-tabs>div>tab[active] a:focus:after,devsite-selector devsite-tabs>div>tab[active] a:hover:after{background:#1a73e8}devsite-selector devsite-tabs tab[two-line] a{line-height:20px;padding-top:4px;white-space:normal}devsite-selector tab[two-line] [tab-label]:after{content:attr(tab-label);display:block;font-size:12px}body devsite-selector devsite-tabs tab[overflow-tab] .devsite-tabs-overflow-menu tab a{height:auto;min-height:48px;width:100%}devsite-selector devsite-tabs[overflow-menu--open] tab[overflow-tab]{background:0;background:var(--devsite-overflow-tab-background,0);border-radius:0;border-radius:var(--devsite-overflow-tab-border-radius,0)}body devsite-selector devsite-tabs tab[overflow-tab] .devsite-tabs-overflow-menu tab a:focus,body devsite-selector devsite-tabs tab[overflow-tab] .devsite-tabs-overflow-menu tab a:hover{background:#f1f3f4;background:var(--devsite-overflow-link-background-hover,#f1f3f4)}devsite-selector>section{display:none;outline:0}devsite-selector>section[active]{display:block;padding:0 23px}devsite-selector>section .devsite-table-wrapper:first-child tbody tr:first-child,devsite-selector>section .devsite-table-wrapper:first-child thead tr{border-top:0}devsite-selector>section>.devsite-table-wrapper,devsite-selector>section>.github-docwidget-gitinclude-code>devsite-code,devsite-selector>section>.github-docwidget-include,devsite-selector>section>aside.beta,devsite-selector>section>aside.caution,devsite-selector>section>aside.dogfood,devsite-selector>section>aside.key-objective,devsite-selector>section>aside.key-point,devsite-selector>section>aside.key-term,devsite-selector>section>aside.note,devsite-selector>section>aside.success,devsite-selector>section>aside.warning,devsite-selector>section>devsite-code,devsite-selector>section>table{margin:0 -23px}devsite-selector>section>:first-child:not(aside):not(devsite-code):not(table):not(.devsite-table-wrapper):not([class^=github-]){margin-top:15px}devsite-selector>section>:last-child:not(aside):not(devsite-code):not(table):not(.devsite-table-wrapper):not([class^=github-]){margin-bottom:15px}devsite-selector 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devsite-spinner__layer-3-fade-in-out{0%,40%,76%{opacity:0}50%,75%{opacity:.99}}@keyframes devsite-spinner__layer-3-fade-in-out{0%,40%,76%{opacity:0}50%,75%{opacity:.99}}@-webkit-keyframes devsite-spinner__layer-4-fade-in-out{0%,65%,to{opacity:0}75%,90%{opacity:.99}}@keyframes devsite-spinner__layer-4-fade-in-out{0%,65%,to{opacity:0}75%,90%{opacity:.99}}devsite-spinner .devsite-spinner__gap-patch{border-color:inherit;-moz-box-sizing:border-box;box-sizing:border-box;height:100%;left:45%;overflow:hidden;position:absolute;top:0;width:10%}devsite-spinner .devsite-spinner__gap-patch .devsite-spinner__circle{left:-450%;width:1000%}devsite-spinner .devsite-spinner__circle-clipper{border-color:inherit;display:inline-block;height:100%;overflow:hidden;position:relative;width:50%}devsite-spinner .devsite-spinner__circle-clipper.devsite-spinner__left{float:left}devsite-spinner .devsite-spinner__circle-clipper.devsite-spinner__right{float:right}devsite-spinner .devsite-spinner__circle-clipper .devsite-spinner__circle{width:200%}devsite-spinner .devsite-spinner__circle{-webkit-animation:none;animation:none;border:3px solid;border-color:inherit;border-bottom-color:transparent!important;border-radius:50%;bottom:0;-moz-box-sizing:border-box;box-sizing:border-box;height:100%;left:0;position:absolute;right:0;top:0}devsite-spinner .devsite-spinner__left .devsite-spinner__circle{-webkit-animation:devsite-spinner__left-spin 1333ms cubic-bezier(.4,0,.2,1) infinite both;animation:devsite-spinner__left-spin 1333ms cubic-bezier(.4,0,.2,1) infinite both;border-right-color:transparent!important;-webkit-transform:rotate(129deg);transform:rotate(129deg)}devsite-spinner .devsite-spinner__right .devsite-spinner__circle{-webkit-animation:devsite-spinner__right-spin 1333ms cubic-bezier(.4,0,.2,1) infinite both;animation:devsite-spinner__right-spin 1333ms cubic-bezier(.4,0,.2,1) infinite 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.devsite-support-projects-placeholder{height:36px;position:absolute}devsite-tabs{display:-webkit-box;display:-webkit-flex;display:-moz-box;display:-ms-flexbox;display:flex;-webkit-box-flex:1;-webkit-flex-grow:1;-moz-box-flex:1;-ms-flex-positive:1;flex-grow:1;height:48px;max-width:calc(100% - 208px);position:relative}devsite-tabs[connected]{max-width:none}devsite-tabs .devsite-tabs-wrapper{bottom:0;display:-webkit-box;display:-webkit-flex;display:-moz-box;display:-ms-flexbox;display:flex;left:0;overflow:hidden;position:absolute;right:0;top:0}[dir=ltr] devsite-tabs.lower-tabs .devsite-tabs-wrapper{left:0;left:var(--devsite-tabs-wrapper-x,0)}[dir=rtl] devsite-tabs.lower-tabs .devsite-tabs-wrapper{right:0;right:var(--devsite-tabs-wrapper-x,0)}devsite-tabs[no-overflow] .devsite-tabs-wrapper{overflow:auto}devsite-tabs[dropdown--open] .devsite-tabs-wrapper,devsite-tabs[overflow-menu--open] .devsite-tabs-wrapper{overflow:visible}devsite-tabs tab{-webkit-flex-shrink:0;-ms-flex-negative:0;flex-shrink:0;position:relative}devsite-tabs tab,devsite-tabs tab>a{display:-webkit-box;display:-webkit-flex;display:-moz-box;display:-ms-flexbox;display:flex}devsite-tabs tab>a{font:500 14px/20px Roboto,Noto Sans,Noto Sans JP,Noto Sans KR,Noto Naskh Arabic,Noto Sans Thai,Noto Sans Hebrew,Noto Sans Bengali,sans-serif;font:var(--devsite-link-font,500 14px/20px Roboto,Noto Sans,Noto Sans JP,Noto Sans KR,Noto Naskh Arabic,Noto Sans Thai,Noto Sans Hebrew,Noto Sans Bengali,sans-serif);letter-spacing:normal;letter-spacing:var(--devsite-link-letter-spacing,normal);padding:0 24px;padding:var(--devsite-link-padding,0 24px);text-transform:uppercase;text-transform:var(--devsite-link-text-transform,uppercase);-webkit-box-align:center;-webkit-align-items:center;-moz-box-align:center;-ms-flex-align:center;align-items:center;margin:0;-webkit-transition:color .2s;transition:color .2s;white-space:nowrap}devsite-tabs tab>a,devsite-tabs 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tab[active]>a:after{border-radius:0;border-radius:var(--devsite-tab-marker-border-radius,0);height:2px;height:var(--devsite-tab-marker-height,2px);left:0;left:var(--devsite-tab-marker-position-x,0);right:0;right:var(--devsite-tab-marker-position-x,0);bottom:0;content:"";display:block;position:absolute}devsite-tabs tab[dropdown]>a{padding:0;position:relative;z-index:2}[dir=ltr] devsite-tabs tab[dropdown]>a{padding-left:24px;padding-left:var(--devsite-dropdown-tab-padding-x,24px)}[dir=rtl] devsite-tabs tab[dropdown]>a{padding-right:24px;padding-right:var(--devsite-dropdown-tab-padding-x,24px)}[dir=ltr] devsite-tabs tab[active][dropdown] a:not(.devsite-tabs-dropdown-toggle):after,[dir=ltr] devsite-tabs tab[dropdown] a:not(.devsite-tabs-dropdown-toggle):focus:after,[dir=ltr] devsite-tabs tab[dropdown] a:not(.devsite-tabs-dropdown-toggle):hover:after{right:0;right:var(--devsite-tab-marker-inset-x,0)}[dir=rtl] devsite-tabs tab[active][dropdown] a:not(.devsite-tabs-dropdown-toggle):after,[dir=rtl] devsite-tabs tab[dropdown] a:not(.devsite-tabs-dropdown-toggle):focus:after,[dir=rtl] devsite-tabs tab[dropdown] a:not(.devsite-tabs-dropdown-toggle):hover:after{left:0;left:var(--devsite-tab-marker-inset-x,0)}devsite-tabs.upper-tabs tab[dropdown] .devsite-tabs-dropdown a,devsite-tabs.upper-tabs tab[dropdown] .devsite-tabs-dropdown a:visited{color:#202124;color:var(--devsite-upper-tab-dropdown-link,#202124)}devsite-tabs.upper-tabs tab[dropdown] .devsite-tabs-dropdown a:focus,devsite-tabs.upper-tabs tab[dropdown] .devsite-tabs-dropdown a:hover{color:#5f6368;color:var(--devsite-upper-tab-dropdown-link-hover,#5f6368)}devsite-tabs.upper-tabs tab[dropdown] .devsite-tabs-dropdown a:focus .devsite-nav-item-title,devsite-tabs.upper-tabs tab[dropdown] .devsite-tabs-dropdown a:hover .devsite-nav-item-title{text-decoration:none;-webkit-text-decoration:var(--devsite-nav-item-title-text-decoration-hover,none);-moz-text-decoration:var(--devsite-nav-item-title-text-decoration-hover,none);text-decoration:var(--devsite-nav-item-title-text-decoration-hover,none)}devsite-tabs .devsite-tabs-dropdown-content{border-top:0;border-top:var(--devsite-header-border,0)}devsite-tabs.upper-tabs tab[dropdown] .devsite-tabs-dropdown-content,devsite-tabs.upper-tabs tab[overflow-tab] .devsite-tabs-overflow-menu{border-radius:0;border-radius:var(--devsite-upper-tab-dropdown-corner-radius,0)}devsite-tabs.upper-tabs tab[dropdown] .devsite-tabs-dropdown-toggle:before,devsite-tabs.upper-tabs tab[overflow-tab] .devsite-icon-arrow-drop-down:before{color:#5f6368;color:var(--devsite-upper-tab-dropdown-inactive,var(--devsite-upper-tab-inactive,#5f6368))}devsite-tabs.upper-tabs tab[active][dropdown] 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tab[overflow-tab]:after{left:-100%;right:-6px}devsite-tabs tab[overflow-tab] tab>a{padding:0 24px;padding:var(--devsite-overflow-tab-padding,0 24px)}devsite-tabs tab[overflow-tab] a{-webkit-box-align:center;-webkit-align-items:center;-moz-box-align:center;-ms-flex-align:center;align-items:center;display:-webkit-box;display:-webkit-flex;display:-moz-box;display:-ms-flexbox;display:flex;-webkit-box-orient:horizontal;-webkit-box-direction:reverse;-webkit-flex-direction:row-reverse;-moz-box-orient:horizontal;-moz-box-direction:reverse;-ms-flex-direction:row-reverse;flex-direction:row-reverse;position:relative}devsite-tabs tab[overflow-tab] tab .devsite-tabs-dropdown,devsite-tabs tab[overflow-tab] tab .devsite-tabs-dropdown-toggle{display:none}devsite-tabs tab[overflow-tab] .devsite-tabs-overflow-menu{box-shadow:0 1px 2px 0 rgba(60,64,67,.3),0 2px 6px 2px 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6px;pointer-events:none;position:absolute;top:100%;z-index:-1}[dir=rtl] devsite-tabs .devsite-tabs-dropdown{right:-6px;left:auto}devsite-tabs [dropdown-full] .devsite-tabs-dropdown{left:0;padding:0 0 6px;width:100vw}devsite-tabs .devsite-tabs-dropdown-content{display:-webkit-box;display:-webkit-flex;display:-moz-box;display:-ms-flexbox;display:flex;display:var(--devsite-dropdown-content-display,flex);grid-template-columns:none;grid-template-columns:var(--devsite-dropdown-content-grid-template-columns,none);grid-template-rows:none;grid-template-rows:var(--devsite-dropdown-content-grid-template-rows,none);padding:0 12px;padding:var(--devsite-dropdown-content-padding,0 12px);background-color:#fff;box-shadow:0 1px 2px 0 rgba(60,64,67,.3),0 2px 6px 2px rgba(60,64,67,.15),inset 0 4px 6px -4px rgba(154,160,166,.5);overflow:auto;max-height:600px;max-width:100vw;pointer-events:none;-webkit-transform:translate3d(0,-150%,0);transform:translate3d(0,-150%,0);-webkit-transition:-webkit-transform 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0;margin:var(--devsite-dropdown-first-section-margin,18px 0 0)}devsite-tabs .devsite-tabs-dropdown-section:not(:first-child){margin-top:54px}devsite-tabs tab[dropdown] .devsite-nav-item,devsite-tabs tab[dropdown] .devsite-nav-title{margin:0 0 18px;margin:var(--devsite-nav-text-margin,0 0 18px);line-height:18px}devsite-tabs tab[dropdown] .devsite-nav-title{border-bottom:0;border-bottom:var(--devsite-nav-title-border-bottom,0);color:#5f6368;color:var(--devsite-nav-title-color,#5f6368);font:inherit;font:var(--devsite-nav-title-font,inherit);font-weight:700;font-weight:var(--devsite-nav-title-font-weight,700);padding:0;padding:var(--devsite-nav-title-padding,0);text-transform:none;text-transform:var(--devsite-nav-title-transform,none);outline:none}devsite-tabs tab[dropdown] 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.devsite-user-dialog-toggle:focus{border-color:rgba(0,0,0,.2)}devsite-user .devsite-user-dialog-photo-thumbnail{height:32px;width:32px}devsite-user[js-signin] button{box-shadow:none}devsite-user[js-signin] .devsite-user-dialog-toggle{opacity:0;-webkit-transition:opacity .45s ease;transition:opacity .45s ease}devsite-user[js-signin] .devsite-user-dialog-toggle.show{opacity:1}devsite-user .devsite-user-dialog-toggle .devsite-user-dialog-letter{-webkit-box-flex:0;-webkit-flex:0 0 32px;-moz-box-flex:0;-ms-flex:0 0 32px;flex:0 0 32px;font-size:17px;height:32px}devsite-user .devsite-user-dialog-learn-more{background-color:#e8f0fe;border-radius:4px;color:#5f6368;font:12px/16px Roboto,Noto Sans,Noto Sans JP,Noto Sans KR,Noto Naskh Arabic,Noto Sans Thai,Noto Sans Hebrew,Noto Sans Bengali,sans-serif;margin:4px 4px 0;padding:4px 29px;text-align:center}devsite-user .devsite-user-dialog-learn-more a,devsite-user .devsite-user-dialog-learn-more span{font-weight:500}devsite-user 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