/* Final responsive layer: phones, tablets and compact laptops. */
html{-webkit-text-size-adjust:100%;text-size-adjust:100%}
body{min-width:0}
img,svg,video,canvas,iframe{max-width:100%}
.site-header,.site-header nav,.hero-copy,.article,.prose,.catalog,.source-structure,.book-prose{min-width:0}
.prose pre,.prose code{max-width:100%}.prose pre{overflow:auto}
.prose h1,.prose h2,.prose h3,.article-head h1,.book-hero h1,.contents-hero h1,.catalog-heading h2{overflow-wrap:anywhere}
.table-wrap{max-width:100%;overscroll-behavior-inline:contain;-webkit-overflow-scrolling:touch}
.table-wrap table{width:max-content;min-width:100%;max-width:none}
.mobile-nav-links,.lang-menu{overscroll-behavior:contain}

/* Semantic links generated from chapter and collection terminology. */
.prose .context-link{position:relative;display:inline;padding:.05em .12em;border-radius:.28em;color:var(--green);font-weight:650;text-decoration-line:underline;text-decoration-style:dotted;text-decoration-thickness:1px;text-underline-offset:.22em;box-decoration-break:clone;-webkit-box-decoration-break:clone;transition:color .16s,background .16s,text-decoration-color .16s}
.prose .context-link::after{content:"\2197";display:inline-block;margin-left:.18em;font:700 .62em/1 var(--sans);color:var(--accent);opacity:.55;transform:translateY(-.08em);transition:transform .16s,opacity .16s}
.prose .context-link:hover,.prose .context-link:focus-visible{color:var(--accent);background:color-mix(in srgb,var(--accent) 11%,transparent);text-decoration-style:solid;outline:0}
.prose .context-link:hover::after,.prose .context-link:focus-visible::after{opacity:1;transform:translate(.12em,-.16em)}
.prose .context-link:focus-visible{box-shadow:0 0 0 2px color-mix(in srgb,var(--accent) 30%,transparent)}

/* Compact laptops. */
@media(max-width:1280px){
  .site-header{height:76px;padding-inline:22px}
  .site-header nav{gap:12px}
  .site-header nav a{font-size:13px}
  .hero,.deck-hero{max-width:1180px;padding-inline:22px;gap:42px}
  .hero{min-height:650px;padding-block:42px 52px;grid-template-columns:.82fr 1.18fr}
  .hero-art{min-height:540px}
  .deck-hero{min-height:650px;padding-block:52px}
  .deck-hero figure{height:540px}
  .section,.home-contents,.deck-problem,.deck-model,.deck-principles,.deck-result{padding-inline:24px}
  .article-layout{gap:44px}
  .catalog-layout,.contents-layout{gap:30px}
}

/* Use the compact navigation before a laptop header becomes crowded. */
@media(max-width:1050px){
  .site-header{isolation:isolate}
  .site-header nav{gap:8px}
  .mobile-menu-toggle{display:inline-flex!important;align-items:center;gap:.45rem;min-height:38px;padding:.42rem .72rem!important;border:1px solid var(--line)!important;border-radius:999px;background:color-mix(in srgb,var(--paper) 92%,var(--soft))!important;color:var(--ink)}
  .mobile-menu-toggle span{position:relative;width:15px;height:10px;border-top:1.5px solid currentColor;border-bottom:1.5px solid currentColor}
  .mobile-menu-toggle span::after{content:"";position:absolute;left:0;right:0;top:3px;border-top:1.5px solid currentColor}
  .mobile-menu-toggle b{font:700 11px var(--sans)}
  .mobile-nav-links{display:none;position:absolute;z-index:130;left:22px;right:22px;top:calc(100% + 8px);max-height:calc(100vh - 98px);overflow:auto;padding:.7rem;border:1px solid var(--line);border-radius:16px;background:var(--paper)!important;box-shadow:0 18px 45px color-mix(in srgb,var(--green) 22%,transparent);backdrop-filter:blur(18px)}
  .site-header.mobile-nav-open .mobile-nav-links{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:.4rem}
  .site-header.mobile-nav-open .mobile-nav-links a{display:block!important;min-width:0;padding:.75rem .8rem;border:1px solid transparent;border-radius:10px;font:600 13px/1.25 var(--sans);overflow-wrap:anywhere}
  .site-header.mobile-nav-open .mobile-nav-links a:hover,.site-header.mobile-nav-open .mobile-nav-links a:focus-visible{border-color:var(--line);background:var(--soft);outline:0}
  .site-header.mobile-nav-open .mobile-menu-toggle{background:var(--green)!important;color:white}
  .site-header nav>a{display:none}
  .article,.crumbs{width:100%;max-width:100%}
}

/* Tablets: landscape and portrait. */
@media(max-width:900px){
  .hero,.deck-hero,.deck-problem,.deck-result{grid-template-columns:1fr}
  .hero{min-height:0;padding:40px 24px 48px;gap:30px}
  .hero-copy{padding-top:0}
  .hero h1{font-size:clamp(50px,8vw,68px);line-height:.98}
  .hero-art{min-height:0;height:auto;aspect-ratio:16/10;border-radius:96px 8px 96px 8px}
  .deck-hero{min-height:0;padding:44px 24px 54px;gap:32px}
  .deck-hero h1{font-size:clamp(54px,9vw,76px)}
  .deck-hero figure{height:auto;aspect-ratio:16/10;border-radius:110px 8px 110px 8px}
  .stats{grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;padding:22px 24px}
  .stats div{min-width:0;gap:8px}
  .stats b{font-size:34px}.stats span{font-size:10px;line-height:1.3}
  .topics,.features{grid-template-columns:repeat(2,minmax(0,1fr))}
  .article{padding:38px 24px 70px}
  .article-head{max-width:none;margin-bottom:30px;padding:18px 0 28px}
  .article-head h1{font-size:clamp(44px,7vw,62px)}
  .article-layout{display:block}
  .article-toc{position:static;max-height:330px;margin:0 0 28px;padding:15px;border:1px solid var(--line);border-left:3px solid var(--accent);border-radius:0 14px 14px 0;overflow:auto}
  .prose{max-width:760px;margin-inline:auto}
  .pager{margin-top:48px}
  .catalog-layout,.contents-layout{display:block;padding-inline:24px}
  .catalog-jump-nav,.contents-layout>.source-part-nav{position:static;max-height:none;margin:0 0 1.25rem;padding:.8rem;border:1px solid var(--line);border-radius:14px;background:color-mix(in srgb,var(--paper) 90%,var(--soft))}
  .catalog-jump-nav>div,.contents-layout>.source-part-nav>div{display:flex;flex-direction:row;max-height:none;overflow-x:auto;gap:.45rem;padding-bottom:.35rem;scroll-snap-type:x proximity}
  .catalog-jump-nav a,.contents-layout>.source-part-nav a{flex:0 0 auto;min-width:max-content;white-space:nowrap;padding:.55rem .72rem;border:1px solid var(--line);border-radius:999px;scroll-snap-align:start}
  .levels,.principles-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .deck-flow{grid-template-columns:1fr}.tree-word{height:360px;border-right:0}
  .deck-science,.deck-science>.deck-card-link{grid-template-columns:1fr;gap:15px}
  .book-hero{padding:3rem 24px 2.5rem}
  .book-toc>div{max-height:320px}
}

@media(min-width:601px) and (max-width:900px){
  .home-outline{grid-template-columns:repeat(2,minmax(0,1fr))}
  .home-outline-row:nth-child(odd){border-right:1px solid var(--line)}
  .home-outline-row{min-height:100px}
  .catalog-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}

/* Phones and narrow tablet portrait. */
@media(max-width:600px){
  body{font-size:15px}
  .site-header{height:66px;padding-inline:12px}
  .site-header .brand-mark{width:40px;height:40px;flex:0 0 40px}
  .site-header .brand>span:not(.brand-mark){font-size:13px;line-height:1.05}
  .site-header .brand small{display:none}
  .site-header nav{gap:5px}
  .mobile-menu-toggle{width:38px;min-width:38px;height:38px;justify-content:center;padding:0!important}
  .mobile-menu-toggle b{display:none}
  .mobile-nav-links{left:10px;right:10px;top:calc(100% + 6px);max-height:calc(100vh - 82px)}
  .site-header.mobile-nav-open .mobile-nav-links{grid-template-columns:repeat(2,minmax(0,1fr))}
  .site-header.mobile-nav-open .mobile-nav-links a{padding:.72rem;font-size:12px}
  .theme-switch,.search-open{width:38px;min-width:38px;height:38px;justify-content:center;padding:0!important}
  .site-header .search-open{display:grid;place-items:center;font-size:0!important;overflow:hidden}
  .site-header .search-open::before{content:"\2315"!important;font:700 20px/1 var(--sans)!important}
  .site-header .search-open kbd{display:none!important}
  .hero{padding:30px 18px 36px;gap:24px}
  .hero h1{margin:12px 0 16px;font-size:clamp(40px,12vw,50px);line-height:1}
  .hero p{font-size:16px;line-height:1.5}
  .hero-actions{align-items:stretch;flex-direction:column;gap:10px;margin-top:22px}
  .hero-actions .button,.hero-actions .text-button{display:flex;width:100%;min-height:46px;align-items:center;justify-content:center;text-align:center}
  .hero-art{aspect-ratio:4/5;border-radius:52px 6px 52px 6px}
  .hero-art figcaption{left:12px;right:12px;bottom:10px;max-height:35%;overflow:auto;padding:10px 12px;font-size:9px;line-height:1.45}
  .carousel-controls{right:9px;top:9px;gap:6px;padding:5px}
  .carousel-controls>button{width:28px;height:28px}
  .stats{grid-template-columns:1fr;gap:0;padding:8px 18px}
  .stats div{min-height:68px;justify-content:space-between;border-bottom:1px solid rgba(255,255,255,.15)}
  .stats div:last-child{border-bottom:0}
  .stats b{font-size:36px}.stats span{text-align:right;font-size:10px}
  .section,.home-contents,.deck-problem,.deck-model,.deck-principles,.deck-result{padding:42px 18px}
  .section-title h2,.home-contents h2{font-size:clamp(34px,10vw,44px)}
  .topics,.features,.home-outline,.catalog-grid,.source-part>div,.levels,.principles-grid,.deck-result ul{grid-template-columns:1fr}
  .home-outline-row:nth-child(odd){border-right:0}
  .home-outline-row{grid-template-columns:38px minmax(0,1fr) 28px;min-height:88px;padding:14px 6px;gap:10px}
  .contents-actions{gap:12px;padding-top:24px}
  .contents-actions .button,.contents-actions .text-button{width:100%;min-height:44px;text-align:center}
  .article,.crumbs{padding-inline:14px}
  .article{padding-top:22px;padding-bottom:52px}
  .crumbs{margin-top:12px;overflow-x:auto;white-space:nowrap}
  .article-head{margin-bottom:22px;padding:8px 0 22px}
  .article-head h1{margin:9px 0 13px;font-size:clamp(35px,10.5vw,46px);line-height:1.04}
  .article-head p{font-size:15px;line-height:1.5}
  .article-toc{max-height:300px;padding:12px 10px}
  .prose{font-size:17px;line-height:1.58}
  .prose>p:first-of-type:first-letter{font-size:54px}
  .prose h2{font-size:clamp(28px,8.4vw,35px)}
  .prose h3{font-size:clamp(21px,6vw,26px)}
  .prose .doc-list li.level-1{margin-left:8px}.prose .doc-list li.level-2{margin-left:16px}
  .table-wrap{margin-inline:0;border-radius:10px}
  .table-wrap th,.table-wrap td{padding:10px 12px}
  .pager{grid-template-columns:1fr;gap:10px;margin-top:34px}
  .pager .next{text-align:left}
  .catalog-hero{padding:34px 18px 28px}.catalog-hero h1{font-size:clamp(44px,13vw,58px)}
  .catalog-layout,.contents-layout{padding-inline:18px;padding-bottom:3rem}
  .catalog-heading{align-items:flex-start}.catalog-heading h2{font-size:clamp(29px,8vw,36px)}
  .catalog-item{padding:15px}.catalog-item small{white-space:normal;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical}
  .catalog-jump-nav,.contents-layout>.source-part-nav{position:relative;margin-bottom:1rem}
  .contents-hero{padding:28px 18px 22px}
  .contents-hero h1{font-size:clamp(36px,11vw,46px)}
  .source-structure{padding-inline:0}.source-part{margin-bottom:2rem}
  .source-part>header{grid-template-columns:2.5rem minmax(0,1fr);gap:.6rem}
  .source-entry{grid-template-columns:1.8rem minmax(0,1fr) .8rem;padding:.82rem;gap:.45rem}
  .book-hero{padding:2rem 16px 1.6rem}.book-hero h1{font-size:clamp(34px,10.5vw,48px)}
  .book-hero>div{align-items:stretch;gap:.7rem}.book-hero .button,.book-download{text-align:center}
  .book-list{padding:.75rem .75rem .75rem 2rem}
  .book-table table{min-width:620px}
  .book-chapter-nav{grid-template-columns:1fr;gap:.7rem;margin-top:2rem}
  .book-chapter-nav>a{min-height:5.2rem;padding:.85rem 1rem}.book-chapter-nav .chapter-next{text-align:left;align-items:flex-start}
  .deck-hero{padding:34px 18px 44px}.deck-hero h1{font-size:clamp(44px,13vw,58px)}
  .deck-hero figure{aspect-ratio:4/5;border-radius:72px 7px 72px 7px}
  .deck-actions,.deck-final>div{align-items:stretch;flex-direction:column;gap:12px}
  .deck-actions a,.deck-final>div a{text-align:center}
  .deck-statement,.deck-statement>.deck-card-link{padding:64px 18px}
  .deck-statement blockquote{font-size:clamp(30px,8.5vw,40px)}
  .tree-word{height:auto;grid-template-rows:repeat(4,minmax(90px,auto))}
  .tree-word span,.tree-word span>.deck-card-link{padding-left:18px}.tree-word span{font-size:clamp(38px,12vw,52px)}
  .flow-copy,.flow-copy>.deck-card-link{padding:54px 18px}
  .deck-science,.deck-science>.deck-card-link{padding:48px 18px}.deck-science p{font-size:19px}
  .deck-final{padding:72px 18px}.deck-final h2{font-size:clamp(42px,12vw,58px)}
  footer{align-items:flex-start;flex-direction:column;gap:10px;padding:28px 18px}
  .search-modal{padding:12px}.search-box{max-height:calc(100vh - 24px)}.search-row{padding:10px}#search-input{min-width:0;padding:12px;font-size:16px}
}

@media(max-width:420px){
  .site-header{padding-inline:8px}
  .site-header .brand>span:not(.brand-mark){display:none}
  .site-header .brand{gap:0}
  .site-header.mobile-nav-open .mobile-nav-links{grid-template-columns:1fr}
  .lang-switch{min-width:52px}.lang-current{min-width:46px;padding-inline:6px!important}
  .lang-menu{right:-76px;width:148px}
  .hero{padding-inline:14px}.hero h1{font-size:clamp(37px,12.5vw,44px)}
  .hero-art{aspect-ratio:3/4}
  .article,.crumbs,.catalog-layout,.contents-layout{padding-inline:10px}
  .article-head h1{font-size:clamp(32px,10.5vw,41px)}
  .article-toc{border-radius:0 11px 11px 0}
  .prose{font-size:16.5px}.prose h2{font-size:29px}
  .contents-hero,.catalog-hero{padding-inline:14px}
  .source-entry{padding:.72rem .62rem}
  .cross-reading{padding:.72rem}
}

@media(prefers-reduced-motion:reduce){
  *,*::before,*::after{scroll-behavior:auto!important;animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}
}

@media(pointer:coarse){
  a,button{touch-action:manipulation}
  .source-entry,.catalog-item,.home-outline-row,.book-outline-item{min-height:48px}
  .article-toc a,.book-toc a{padding-block:.55rem}
}