/* Reading and responsive refinements; uses the established color palette. */
:root{--reader-size:16px}
body{-webkit-text-size-adjust:100%;text-size-adjust:100%}
button,a,input,select,textarea{-webkit-tap-highlight-color:transparent}
button,a{touch-action:manipulation}
.note-row>div,.resource-link>div,.topbar-left,.breadcrumb,.search-result>div{min-width:0}
h1,h2,h3,.resource-link strong,.search-result strong{overflow-wrap:anywhere}
.reader-toc .reader-toc-toggle,.mobile-bottom-nav,.sidebar-close{display:none}
.toc-content>button,.toc-content>a{display:block;width:100%;text-align:left;padding:8px 0;color:var(--secondary);font-size:12px;line-height:1.8}
.toc-content>button:hover{color:var(--blue)}
.article-body,.article-lead{font-size:var(--reader-size);line-height:1.95}
.article-body .callout,.article-body .article-callout,.self-check{font-size:inherit}
.article-meta{font-size:12px}.back-link{font-size:13px;min-height:40px}.reading-actions>.button{font-size:12px;min-height:40px}
.reader-size{display:flex;align-items:center;border:1px solid var(--line);background:var(--surface);border-radius:6px;overflow:hidden;margin-left:auto}
.reader-size button{min-height:40px;min-width:40px;font-size:14px;color:var(--blue)}
.reader-size span{font-size:11px;color:var(--secondary);min-width:36px;text-align:center}
.reader-size button:disabled{color:var(--muted);opacity:.45;cursor:default}
.reading-actions>span{width:100%}.reading-summary>.button-group{margin-left:auto}.backup-help{font-size:13px;color:var(--secondary);line-height:1.9;margin:13px 0 0}
.archive-count{font-size:12px;color:var(--secondary);margin-top:14px}.continue-reading{display:flex;align-items:center;gap:18px;flex-wrap:wrap;padding:20px 22px;background:var(--blue-soft);border:1px solid var(--line);border-radius:8px;margin:0 0 30px}
.continue-reading>span:first-child{display:flex;align-items:center;gap:8px;color:var(--blue);font-size:12px}.continue-reading strong{flex:1;font-size:15px;color:var(--heading)}.continue-reading>span:last-child{font-size:12px;color:var(--blue)}
.code-example pre{overscroll-behavior-x:contain;-webkit-overflow-scrolling:touch}
.self-check summary{min-height:40px;align-content:center}.side-nav>a{font-size:13px;min-height:44px}.sidebar-intro strong{font-size:13px}.sidebar-intro p{font-size:11px}.sidebar-bottom{font-size:11px}.sidebar-note p{font-size:12px}
@media(max-width:1000px){
.reader-layout{display:flex;flex-direction:column;gap:0}.reader-main{width:100%}
.reader-toc{order:-1;position:static;width:100%;padding:0;background:var(--surface);border:1px solid var(--line);border-radius:8px;display:block;margin-bottom:24px}
.reader-toc .reader-toc-toggle{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:13px 17px;min-height:48px;width:100%;color:var(--heading);font-size:14px;font-weight:600;text-align:left}
.reader-toc-toggle>span{font-size:20px;font-weight:400;color:var(--blue)}
.toc-content{display:none;padding:0 17px 15px}.reader-toc.is-expanded .toc-content{display:block}
.toc-content>button{font-size:13px;min-height:44px;padding:10px 0;border-bottom:1px solid var(--line)}
.reader-toc .tiny-label{display:none}.reader-toc .toc-bottom{display:none}.course-toc{display:block;padding-top:8px}.course-toc a{font-size:12px;min-height:44px;margin:0;padding:10px 0}
.archive-tools{flex-wrap:wrap}.archive-search{flex:1;min-width:180px}.filter-group{order:1;width:100%}
}
@media(max-width:720px){
:root{--mobile-bar:64px}
html{scroll-padding-top:95px}
body{padding-bottom:calc(var(--mobile-bar) + env(safe-area-inset-bottom));font-size:15px}
.site-main{min-width:0}.page-content{padding:26px max(20px,env(safe-area-inset-right)) 35px max(20px,env(safe-area-inset-left))}
.topbar{height:calc(64px + env(safe-area-inset-top));padding-top:env(safe-area-inset-top)}
.topbar-inner{padding:0 max(12px,env(safe-area-inset-right)) 0 max(12px,env(safe-area-inset-left));gap:6px}
.topbar-left{gap:6px;flex:1;overflow:hidden}.topbar-actions{gap:0;flex-shrink:0}.breadcrumb{flex:1;overflow:hidden}.breadcrumb>span,.breadcrumb>i{display:none}.breadcrumb strong{font-size:13px;max-width:none;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.menu-toggle,.topbar-actions .icon-button,.search-trigger{display:flex;align-items:center;justify-content:center;flex-shrink:0;min-width:44px;width:44px;height:44px;min-height:44px;padding:11px;border:0;background:none}
.search-trigger>span:not(:first-child),.search-trigger>kbd{display:none}.search-trigger svg{width:20px;height:20px}
.sidebar{width:min(320px,88vw);max-height:100dvh;padding:27px 22px calc(22px + env(safe-area-inset-bottom));padding-top:calc(27px + env(safe-area-inset-top));overscroll-behavior:contain}
.sidebar-close{display:flex;position:absolute;right:12px;top:calc(12px + env(safe-area-inset-top));width:44px;height:44px;font-size:28px;line-height:1;z-index:1}
.sidebar .site-brand{padding-right:38px}.site-brand>span:last-child{font-size:13px}.sidebar-intro{padding-block:24px}.sidebar-intro strong{font-size:14px}.sidebar-intro p{font-size:12px}.nav-caption{font-size:12px;margin-top:20px}.side-nav>a{font-size:15px;padding:12px;min-height:48px}.nav-count,.nav-mark{font-size:12px}.sidebar-note{margin:22px 3px}.sidebar-note>a{font-size:12px}.sidebar-bottom>a{min-height:44px;align-content:center}
.mobile-bottom-nav{position:fixed;inset:auto 0 0;display:grid;grid-template-columns:repeat(4,minmax(0,1fr));background:var(--surface);border-top:1px solid var(--line);padding:5px max(8px,env(safe-area-inset-right)) calc(5px + env(safe-area-inset-bottom)) max(8px,env(safe-area-inset-left));z-index:28;min-height:var(--mobile-bar);box-shadow:0 -5px 22px #182a4606}
.mobile-bottom-nav>a{display:flex;flex-direction:column;justify-content:center;align-items:center;gap:3px;min-height:53px;color:var(--secondary);font-size:11px;line-height:1.5;border-radius:7px}.mobile-bottom-nav svg{width:21px;height:21px}.mobile-bottom-nav>a.active{color:var(--blue);background:var(--blue-soft);font-weight:600}
.toast{bottom:calc(80px + env(safe-area-inset-bottom));font-size:13px;max-width:calc(100% - 32px)}
.hero{display:block;min-height:0;padding:5px 0 18px}.hero h1{font-size:clamp(28px,7.3vw,38px);white-space:normal;line-height:1.6;letter-spacing:-.6px}.hero .eyebrow{font-size:9px;letter-spacing:1px}.hero-description{font-size:14px;line-height:1.95;max-width:100%}.hero-graph{display:none}.hero-actions{gap:10px}.hero-actions .button{font-size:13px;min-height:46px;padding:10px 15px;gap:10px}
.button,.button.small{min-height:44px;font-size:13px;padding:10px 14px;line-height:1.65}.button:hover{transform:none}
.intro-strip{display:flex;flex-wrap:wrap;gap:8px;margin-top:6px;font-size:12px;padding:15px 0}.intro-strip>span:last-child{padding-left:0}.intro-strip i{margin-inline:5px}.intro-strip>span:first-child{font-size:12px}
.section-heading{align-items:flex-start;flex-wrap:wrap;gap:9px}.section-heading>div{min-width:0;flex:1 1 200px}.section-heading h2{font-size:23px}.section-heading p{font-size:13px;line-height:1.8}.section-link{min-height:44px;display:inline-flex;align-items:center;font-size:13px;white-space:normal}.section-label{font-size:9px;letter-spacing:1px}
.start-learning-grid{grid-template-columns:1fr;gap:12px}.start-learning-grid>a{padding:19px;display:grid;grid-template-columns:34px minmax(0,1fr);gap:8px 13px}.start-learning-grid .topic-icon{grid-column:1;grid-row:1 / 3}.start-learning-grid strong,.start-learning-grid p,.start-learning-grid>a>span:last-child{grid-column:2}.start-learning-grid strong{font-size:16px}.start-learning-grid p{font-size:13px;line-height:1.8}.start-learning-grid>a>span:last-child{font-size:13px;margin-top:3px}
.topic-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.topic-card{padding:18px 15px;min-width:0}.topic-card h3{font-size:16px}.topic-card p{font-size:13px;min-height:0;line-height:1.8}.topic-top{flex-wrap:wrap;gap:9px}.topic-count{font-size:11px}.topic-tags{font-size:11px;gap:5px}.topic-tags span{padding:3px 6px}.topic-card .card-arrow{display:none}.topic-card .topic-tags{padding:0}
.note-row,.archive-list .note-row{grid-template-columns:34px minmax(0,1fr) 12px;gap:12px;padding:21px 0}.note-row h3,.archive-list .note-row h3{font-size:16px}.note-row-meta,.archive-list .note-row-meta{font-size:11px;gap:6px}.note-row p,.archive-list .note-row p{font-size:13px;line-height:1.85}
.page-heading h1{font-size:30px;line-height:1.5;text-wrap:balance}.page-heading .eyebrow,.topic-head .eyebrow{font-size:9px}.page-heading>p,.topic-description{font-size:14px;line-height:1.9}.topic-head h1{font-size:27px}.subtle-notice{font-size:13px;padding:16px}
.archive-tools{display:grid;grid-template-columns:minmax(0,1fr);gap:12px}.filter-select{max-width:none;width:100%;min-height:46px;font-size:16px}.archive-search{min-width:0;width:100%}.archive-search input{min-height:46px;font-size:16px;padding-left:38px}.archive-search svg{top:15px;left:13px;width:17px;height:17px}.filter-group{order:initial;flex-wrap:nowrap;overflow-x:auto;max-width:100%;padding:3px 2px 7px;gap:5px;scrollbar-width:thin}.filter-button{min-height:44px;font-size:13px;padding:10px 12px;white-space:nowrap;flex-shrink:0}
.archive-count{font-size:13px}.scope-grid,.route-summary,.framework-grid,.route-grid,.method-grid,.case-grid{grid-template-columns:1fr;gap:15px}.panel p,.panel li,.route-card p,.summary-box p,.method-card p,.method-card ol,.case-card p{font-size:14px;line-height:1.9}.panel h2,.route-card h2,.method-card h2,.case-card h2{font-size:22px}.route-card-top>span:last-child,.route-card-bottom,.route-mini-stages,.summary-box strong,.method-example,.method-output,.case-label,.case-label>span:last-child,.case-open{font-size:12px}.route-mini-stages{gap:7px}.record-templates>p{font-size:14px}.record-templates .button{font-size:13px}.mini-route>span,.learning-feature>p,.method-banner p{font-size:14px}.method-chain{flex-wrap:wrap;font-size:13px;gap:8px}
.article-header h1{font-size:28px;line-height:1.6;letter-spacing:-.4px}.article-meta{font-size:12px;gap:8px}.article-header{padding-bottom:20px;margin-bottom:20px}.article-body,.article-lead{font-size:var(--reader-size);line-height:1.95}.article-body h3{font-size:23px;scroll-margin-top:95px}.article-body code{font-size:.88em}.article-body table{font-size:13px}.article-body .code-example pre{font-size:13px;line-height:1.85;padding:17px}.code-example figcaption{font-size:12px;padding:7px 12px;gap:8px}.code-example button{font-size:12px;min-height:44px;padding:8px 12px}.code-example{margin-inline:0}.self-check{padding:15px}.self-check summary{font-size:14px;min-height:44px}.self-check p{font-size:var(--reader-size)}.example-note{font-size:12px}.reading-actions{gap:8px}.reading-actions>.button{font-size:13px;min-height:44px}.reading-actions>span{font-size:12px}.reader-size button{min-height:44px;min-width:40px}.reader-size{margin-left:0}.reader-size span{min-width:32px}.lesson-context{font-size:12px;padding:13px}.lesson-context a{min-height:32px;display:inline-flex;align-items:center}
.lesson-link{padding:20px 15px;gap:12px;flex-wrap:wrap;align-items:flex-start}.lesson-link>div{flex:1 1 75%}.lesson-link strong{font-size:17px}.lesson-link p{font-size:14px}.lesson-status{font-size:13px;margin-left:33px}.chapter-nav{grid-template-columns:1fr}.chapter-nav small{font-size:12px}.chapter-nav strong{font-size:15px}.resources h2,.related-content h2{font-size:21px}.resource-link strong{font-size:15px}.resource-link p{font-size:13px}.resource-link small{font-size:11px}
.stage{padding-left:20px;margin-left:8px}.stage-box{padding:19px 16px}.stage-box h2{font-size:21px}.stage-detail{font-size:14px}.stage-detail strong{font-size:13px}.stage-topics span{font-size:12px}.stage-check{font-size:14px;gap:10px;min-height:44px}.stage-check span strong{font-size:12px}.stage-check input{width:20px;height:20px;margin-top:3px}.stage-read-link strong{font-size:17px}.stage-read-link span{font-size:12px}.progress-top{font-size:13px;gap:8px;flex-wrap:wrap}.local-progress p{font-size:12px}.local-notebook textarea{font-size:16px}.local-notebook p,.save-status{font-size:13px}.notebook-bottom{flex-wrap:wrap}.notebook-bottom .button-group{margin:0}
.reading-summary{gap:14px}.reading-summary>.button-group{width:100%;margin:0}.reading-summary strong{font-size:15px}.continue-reading{gap:10px;padding:18px}.continue-reading strong{flex-basis:100%;font-size:17px}.continue-reading>span{font-size:13px}.continue-reading>span:last-child{font-size:13px}.backup-help{font-size:13px}.empty-state{font-size:14px;padding:30px 15px}
.search-dialog{inset:calc(12px + env(safe-area-inset-top)) 12px auto;width:auto;max-width:none;max-height:calc(100dvh - 24px - env(safe-area-inset-top) - env(safe-area-inset-bottom));margin:0;border-radius:10px}.search-box{gap:8px;padding:10px}.search-box input{font-size:16px;min-height:44px}.search-box>svg{width:18px;height:18px}.dialog-close{font-size:13px;min-height:44px;min-width:44px;padding:8px}.search-results{max-height:55dvh;padding:7px;overscroll-behavior:contain}.search-result{min-height:64px;padding:12px 10px;gap:10px}.search-result strong{font-size:14px}.search-result small{font-size:12px}.search-caption{font-size:13px}.search-footer{font-size:12px;gap:12px;padding:12px}.search-footer>span:last-child{display:none}
.skill-table td,.skill-table th{padding:13px 10px}.skill-table td:first-child{width:32%;font-size:13px}.skill-table td:nth-child(2){font-size:12px}.skill-table td:last-child{font-size:12px;width:23%;white-space:normal}.skill-table th{font-size:12px}.reference-list>a{font-size:13px;min-height:44px;display:inline-flex;align-items:center}.site-footer{margin-inline:20px;gap:12px}.site-footer>div>span,.site-footer>span{font-size:12px}.site-footer button{min-height:44px;font-size:13px}
}
@media(max-width:360px){.topic-grid{grid-template-columns:1fr}.reader-size{width:100%;justify-content:space-between}.hero-actions .button{flex:1;padding-inline:10px}.page-content{padding-inline:16px}.site-footer{margin-inline:16px}}
@media print{.mobile-bottom-nav,.sidebar-close,.reader-size,.reader-toc-toggle,.continue-reading{display:none!important}body{padding:0}.article-body{font-size:12pt}}