:root{--hn-white:#fff;--hn-ink:#1d2630;--hn-slate:#3a566f;--hn-muted:#637683;--hn-rule:#d3dde2;--hn-pale:#f2f4f5;--hn-footer:#151c24;--hn-serif:'Hiragino Mincho ProN','Yu Mincho','YuMincho',serif;--hn-sans:'Hiragino Sans','Hiragino Kaku Gothic ProN','Yu Gothic',Meiryo,sans-serif;--hn-width:1120px;--hn-radius:3px}
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@media(min-width:1600px){.hn-hero-photo{object-position:center 57%}.hn-hero{min-height:640px}}
@media(max-width:1190px){.hn-header-inner{gap:20px;width:calc(100% - 48px)}.hn-wordmark{font-size:24px}.hn-navigation{gap:20px}.hn-nav-list{gap:20px;font-size:12px}.hn-article-layout{gap:40px;grid-template-columns:minmax(0,1fr) 270px}.hn-work-copy{padding:38px 28px}.hn-work-copy .hn-heading{font-size:25px;gap:10px}.hn-work-copy .hn-heading:after{width:24px}.hn-three-steps{gap:18px}.hn-three-steps strong{font-size:18px}.hn-three-steps small{font-size:10px}.hn-three-steps span{top:2px;width:23px;height:23px;line-height:23px;font-size:16px}.hn-book-grid{gap:36px}.hn-book-grid h3{font-size:27px}.hn-book-grid .hn-button{white-space:normal}.hn-footer-inner{gap:32px}.hn-footer .hn-wordmark{font-size:23px}.hn-footer-invite{padding-left:25px}}
@media(max-width:960px){.hn-header-inner{min-height:74px}.hn-menu-toggle{display:flex;align-items:center;gap:8px;border:0;background:transparent;font-size:12px;padding:10px 0}.hn-navigation{display:none;position:absolute;left:0;right:0;top:100%;background:#fff;box-shadow:0 12px 20px #1d263010;padding:24px 40px;border-bottom:1px solid var(--hn-rule)}.hn-navigation.is-open{display:flex;align-items:stretch;flex-direction:column;gap:18px}.hn-navigation .hn-nav-list{display:grid;grid-template-columns:1fr 1fr;gap:12px 24px;font-size:14px}.hn-member-link{position:static;padding:10px 0;font-size:13px}.hn-hero{min-height:500px}.hn-hero h1{font-size:46px}.hn-hero p{font-size:18px}.hn-book-grid{grid-template-columns:1fr 200px 1fr;gap:24px}.hn-book-grid h3{font-size:24px}.hn-book-grid p{font-size:14px}.hn-book-grid .hn-button{font-size:12px;gap:8px;padding:10px}.hn-heading{font-size:29px}.hn-work-band{grid-template-columns:45% 55%;min-height:480px}.hn-work-visual{min-height:440px}.hn-work-visual>p{font-size:20px;left:14%}.hn-work-copy .hn-heading{font-size:23px}.hn-work-copy .hn-heading:after{display:none}.hn-three-steps{gap:12px}.hn-three-steps li:not(:last-child):after{left:calc(100% + 3px);font-size:22px}.hn-three-steps li{min-width:0;padding-inline:3px}.hn-three-steps strong{font-size:17px}.hn-work-closing{font-size:20px}.hn-work-copy p{font-size:14px}.hn-topic-list a{gap:20px;grid-template-columns:35px 32% 1fr 20px}.hn-topic-list img{height:125px}.hn-topic-list h3{font-size:21px}.hn-topic-list p{font-size:13px}.hn-author-line{grid-template-columns:1fr 230px}.hn-author-line .hn-heading{font-size:23px}.hn-author-line .hn-heading:after{width:32px}.hn-related-book{padding-left:30px}.hn-app-strip{padding:22px;gap:20px;grid-template-columns:70px 1fr auto}.hn-app-strip>img{width:65px;height:65px}.hn-app-strip h3{font-size:20px}.hn-app-strip p{font-size:12px}.hn-app-strip .hn-button{font-size:12px;padding-inline:16px}.hn-footer-inner{grid-template-columns:1fr 1fr}.hn-footer-invite{grid-column:1/-1;border-left:0;border-top:1px solid #4f5b65;padding:24px 0 0;display:flex;align-items:center;gap:24px;justify-content:space-between}.hn-footer-invite p{margin:0}.hn-footer-invite p:nth-child(2){max-width:450px}.hn-footer-invite .hn-button{flex:none}.hn-article-layout{grid-template-columns:minmax(0,1fr);gap:50px;max-width:820px}.hn-sidebar{display:grid;grid-template-columns:1fr 1fr;gap:32px;padding:28px}.hn-side-section{margin-bottom:0}.hn-side-book{grid-column:2;grid-row:2/4}.hn-article-header h1{font-size:36px}}
@media(max-width:640px){body{font-size:15px;letter-spacing:.015em}.hn-container{width:calc(100% - 40px)}.hn-header-inner{width:calc(100% - 36px);min-height:68px;gap:12px}.hn-wordmark{font-size:22px;letter-spacing:0}.hn-menu-toggle span{font-size:10px}.hn-navigation{padding:24px 20px}.hn-button{min-height:50px;padding:12px 18px;font-size:13px;gap:12px}.hn-actions{gap:12px}.hn-hero{min-height:620px;align-items:start}.hn-hero-photo{height:360px;top:auto;bottom:0;object-fit:cover;object-position:70% center}.hn-hero:after{content:'';position:absolute;inset:230px 0 auto;height:100px;background:linear-gradient(#fff,#fff0);pointer-events:none}.hn-hero-inner{padding-block:46px 0;position:relative;z-index:1}.hn-hero h1{font-size:37px;line-height:1.5;margin-bottom:20px;letter-spacing:.01em}.hn-hero p{font-size:16px;line-height:1.8;margin-bottom:23px}.hn-hero .hn-actions{display:grid;grid-template-columns:1fr 1fr;gap:12px}.hn-hero .hn-button{font-size:12px;gap:8px;padding:12px 8px}.hn-book-section{padding-block:40px 46px}.hn-heading{font-size:27px;gap:20px}.hn-heading:after{width:40px}.hn-book-section>.hn-heading{margin-bottom:26px}.hn-book-grid{grid-template-columns:1fr 140px;gap:24px 20px}.hn-book-grid h3{font-size:23px;line-height:1.7}.hn-book-grid p{font-size:14px}.hn-book-grid>div:last-child{grid-column:1/-1;text-align:center}.hn-book-grid>div:last-child p br{display:none}.hn-book-grid .hn-button{font-size:13px;padding:13px 22px}.hn-cover{width:140px}.hn-work-band{grid-template-columns:1fr;min-height:0}.hn-work-visual{min-height:0;height:300px}.hn-work-visual img{object-position:center 48%}.hn-work-visual>p{left:21%;top:27%;font-size:23px}.hn-work-visual>p small{font-size:12px}.hn-work-copy{padding:34px 20px 42px;max-width:480px;width:100%;margin:auto}.hn-work-copy .hn-heading{font-size:25px;white-space:normal;line-height:1.7;display:block}.hn-status{font-size:11px;margin-bottom:16px}.hn-work-copy>p{font-size:14px}.hn-three-steps{gap:20px;margin:28px 0 22px}.hn-three-steps li{max-width:none;padding:22px 4px 12px}.hn-three-steps span{top:4px}.hn-three-steps strong{font-size:19px;margin-top:10px}.hn-three-steps small{font-size:10px}.hn-three-steps li:not(:last-child):after{left:calc(100% + 7px)}.hn-work-copy .hn-work-closing{font-size:20px;white-space:nowrap;letter-spacing:0}.hn-work-copy>.hn-button{width:100%}.hn-topic-section{padding-top:40px;padding-bottom:20px}.hn-topic-section>.hn-heading{font-size:25px;line-height:1.75;display:block}.hn-topic-section>.hn-heading:after{display:none}.hn-topic-list a{grid-template-columns:26px 105px 1fr;gap:12px;padding:22px 0;align-items:start}.hn-topic-number{font-size:19px;margin-top:0}.hn-topic-list img{height:90px}.hn-topic-list h3{font-size:18px;line-height:1.65;margin-bottom:8px}.hn-topic-list p{font-size:11px;line-height:1.8}.hn-topic-list .hn-icon{display:none}.hn-topic-list{margin-bottom:24px}.hn-centered>.hn-button{min-width:220px}.hn-author-line{grid-template-columns:1fr;gap:22px;padding-block:30px}.hn-author-line .hn-heading{font-size:24px;gap:18px}.hn-author-line p{font-size:18px}.hn-related-book{border-left:1px solid #b9c5cc;padding-left:20px;margin-left:4px}.hn-related-book a{font-size:14px}.hn-related-book br{display:none}.hn-app-strip{grid-template-columns:64px 1fr;gap:18px;padding:20px;margin-bottom:0}.hn-app-strip>img{width:64px;height:64px}.hn-app-strip h3{font-size:18px;line-height:1.7}.hn-app-strip p{font-size:12px}.hn-app-strip .hn-button{grid-column:1/-1;justify-self:stretch}.hn-app-strip small{font-size:10px}.hn-closing{padding:42px 0 44px}.hn-closing h2{font-size:25px}.hn-closing .hn-actions{display:grid;grid-template-columns:1fr}.hn-footer{padding:38px 0}.hn-footer-inner{grid-template-columns:1fr;gap:28px}.hn-footer .hn-wordmark{font-size:25px}.hn-footer-nav .hn-nav-list{display:grid;grid-template-columns:1fr 1fr;gap:6px 20px;font-size:12px}.hn-footer-nav .hn-nav-list li:last-child{grid-column:1/-1}.hn-legal{margin-top:22px;gap:12px 16px}.hn-footer-invite{grid-column:auto;display:block;padding-top:24px}.hn-footer-invite p{margin-bottom:12px}.hn-footer-invite p:nth-child(2){max-width:none}.hn-footer-invite .hn-button{min-height:44px}.hn-article-layout{padding-top:26px;padding-bottom:44px;gap:38px}.hn-breadcrumb{font-size:10px;gap:8px;margin-bottom:20px}.hn-article-header h1{font-size:29px;line-height:1.65;margin-bottom:18px}.hn-meta{font-size:11px;gap:10px}.hn-feature-image{margin-bottom:22px}.hn-feature-image img{max-height:300px}.hn-prose{line-height:2.05;font-size:15px}.hn-prose h2{font-size:23px;margin-top:38px;padding-bottom:14px}.hn-prose h3{font-size:19px}.hn-prose blockquote{padding:18px;font-size:14px}.hn-prose .alignleft,.hn-prose .alignright{float:none;margin:24px auto}.hn-toc{padding:20px}.hn-toc strong{font-size:17px}.hn-toc li{font-size:13px}.hn-sidebar{grid-template-columns:1fr;gap:32px;padding:25px 20px}.hn-side-book{grid-row:auto;grid-column:auto}.hn-side-title{font-size:21px}.hn-ranking a{grid-template-columns:24px 85px 1fr;gap:12px}.hn-ranking img{width:85px;height:62px}.hn-ranking strong{font-size:13px}.hn-side-book{display:flex;flex-direction:column;align-items:center}.hn-side-book .hn-side-title{align-self:stretch}.hn-side-book .hn-button{max-width:270px}.hn-category-list>li{font-size:14px}.hn-tags a{font-size:12px!important}.hn-book-cta{grid-template-columns:88px 1fr;gap:20px;padding:26px 0;align-items:start}.hn-book-cta>img{width:88px;margin-top:8px}.hn-book-cta .hn-heading{font-size:20px;display:block}.hn-book-cta .hn-heading:after{display:none}.hn-book-cta p{font-size:12px}.hn-book-cta .hn-button{font-size:11px;gap:8px;padding:11px;min-height:48px}.hn-text-link{font-size:11px;line-height:1.9}.hn-author-box{gap:14px;padding:20px 16px}.hn-author-symbol{width:38px;height:38px}.hn-author-symbol .hn-icon{width:20px;height:20px}.hn-author-box div>span{display:block;font-size:10px}.hn-author-box p{font-size:12px}.hn-related-list{grid-template-columns:1fr;gap:18px}.hn-related-list>a{display:grid;grid-template-columns:100px 1fr;gap:0 16px;align-items:start}.hn-related-list img{width:100px;height:80px;grid-row:1/3}.hn-related-list h3{font-size:13px;margin-top:0;margin-bottom:6px}.hn-list-heading h1{font-size:28px}.hn-post-list article>a{grid-template-columns:100px 1fr;gap:18px;padding:24px 0;align-items:start}.hn-post-list img{width:100px;height:88px}.hn-post-list h2{font-size:17px;line-height:1.65}.hn-post-list p{font-size:11px}.hn-post-list .hn-icon{display:none}.hn-page{padding-top:28px;padding-bottom:50px}.hn-page-title{font-size:31px;margin-bottom:30px}.hn-page-lead{font-size:23px}.hn-editorial-hero{grid-template-columns:1fr;gap:24px}.hn-editorial-hero img{max-height:270px;object-fit:cover}.hn-lesson-overview li{grid-template-columns:32px 1fr;gap:16px}.hn-lesson-overview h3{font-size:21px}.hn-lesson-overview p{font-size:13px}}
@media(max-width:359px){.hn-container{width:calc(100% - 32px)}.hn-header-inner{width:calc(100% - 28px)}.hn-wordmark{font-size:20px}.hn-menu-toggle{gap:5px}.hn-menu-toggle span{display:none}.hn-hero h1{font-size:33px}.hn-hero p{font-size:14px}.hn-hero .hn-button{font-size:11px;padding-inline:4px;gap:5px}.hn-book-grid{grid-template-columns:1fr 115px;gap:16px}.hn-cover{width:115px}.hn-book-grid h3{font-size:21px}.hn-heading{font-size:25px}.hn-work-copy .hn-heading{font-size:23px}.hn-three-steps{gap:14px}.hn-three-steps strong{font-size:17px}.hn-three-steps small{font-size:9px}.hn-work-copy .hn-work-closing{font-size:18px}.hn-topic-list a{grid-template-columns:22px 85px 1fr;gap:9px}.hn-topic-list img{height:85px}.hn-topic-list h3{font-size:16px}.hn-topic-list p{font-size:10px}.hn-author-line .hn-heading{font-size:22px}.hn-app-strip h3{font-size:16px}.hn-app-strip{padding:18px;gap:14px}.hn-article-header h1{font-size:27px}.hn-book-cta{grid-template-columns:75px 1fr;gap:16px}.hn-book-cta>img{width:75px}.hn-book-cta .hn-heading{font-size:18px}.hn-book-cta .hn-button{font-size:10px;padding:11px 7px}.hn-book-cta .hn-icon{width:14px}.hn-footer .hn-wordmark{font-size:23px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{transition:none!important;animation:none!important}}
@media print{.hn-header,.hn-sidebar,.hn-footer,.hn-book-cta,.hn-related,.hn-comments,.hn-article-tags{display:none}.hn-container{width:100%}.hn-article-layout{display:block;padding:0}.hn-prose{font-size:11pt}.hn-article-header h1{font-size:22pt}.hn-feature-image{max-width:70%}a{color:#000}.hn-prose a:after{content:' (' attr(href) ')';font-size:8pt}}

/* Keep the menu icon named and comfortably tappable at the narrowest width. */
.hn-menu-toggle{min-width:44px;min-height:44px;justify-content:center}