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@media(min-width:1700px){.admin-shell{border-left:1px solid var(--line);border-right:1px solid var(--line)}}
@media(max-width:1250px){.editor-workspace{grid-template-columns:minmax(0,1fr) 185px}.page-heading{flex-wrap:wrap}.page-heading .actions{flex-shrink:1;justify-content:flex-start}.admin-shell{grid-template-columns:245px minmax(0,1fr)}.chapter-row{flex-wrap:wrap}.row-actions{margin-left:auto}.editor-heading .actions{width:100%}}
@media(max-width:1000px){.editor-workspace{grid-template-columns:1fr}.editor-tools{position:static;grid-row:1}.block-kind-buttons{flex-direction:row;flex-wrap:wrap}.editor-tools .nav-divider,.editor-tools>p.muted{display:none}.editor-tools{padding:16px}.block-kind-buttons button{flex:1 1 120px}.step-heading{flex-wrap:wrap}.admin-main{padding:28px 20px}}
@media(max-width:760px){.site-header{padding:11px 14px;min-height:68px;gap:10px}.brand{font-size:1rem;gap:8px}.brand-mark,.brand-logo{width:32px;height:32px;flex-basis:32px}.menu-toggle{display:block;flex-shrink:0}.header-start{gap:8px;flex:1}.admin-shell{display:block;min-height:calc(100dvh - 68px)}.left-sidebar{display:none}h1{font-size:1.8rem}.step-heading h2{font-size:1.15rem}.admin-main{padding:26px 16px}.admin-badge{display:none}.site-header>.button{padding:7px 10px;min-height:38px;font-size:.75rem;flex-shrink:0}.page-heading{gap:16px;margin-bottom:22px}.page-heading h1{font-size:1.7rem}.list-toolbar{flex-wrap:wrap}.chapter-row{padding:18px 14px;gap:12px}.chapter-row-info{flex-basis:70%}.row-actions{width:100%;margin:0 0 0 25px;justify-content:flex-start}.panel{padding:18px}.editor-tools{padding:14px}.editor-block{padding:16px}.editor-heading .actions{gap:7px}.editor-heading .button{flex:1;padding:7px 8px;font-size:.8rem}.settings-form{padding:20px 18px}.image-card{padding:0}.image-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.image-info{padding:12px}.image-info .actions{flex-direction:column;align-items:stretch;gap:5px}.image-card .image-zoom img{height:150px}.login-page{padding:20px}.login-panel{padding:28px 23px}.editor-tools .text-link{display:block;margin-top:12px}}
@media(max-width:420px){.image-grid{grid-template-columns:1fr}.brand>span:last-child{max-width:180px}.image-id-row{flex-wrap:wrap}.image-id-row input{flex-basis:100%}.step-heading{gap:10px}.step-heading h2{flex-basis:calc(100% - 45px)}.editor-heading .actions{flex-wrap:wrap}.editor-heading .button{flex-basis:calc(50% - 8px)}}
.reader-nav .chapter-link{font-size:1.125rem;font-weight:700;line-height:1.55;min-height:48px;padding:12px 11px}.reader-nav .chapter-link.active{font-weight:700}.reader-nav .chapter-number{padding-top:3px}
/* Public reading layout: fluid type and a persistent category column at every width. */
.content-image-tools{display:flex;align-items:center;flex-wrap:wrap;gap:10px;margin-top:-8px}
.content-image-tools .button{flex-shrink:0;color:var(--blue);background:var(--blue-soft);border-color:#c9ddfb}
.content-image-hint{flex:1 1 220px;min-width:0;font-size:.8rem;line-height:1.6;color:var(--muted)}
.reading-area>*{max-width:1120px;margin-left:auto;margin-right:auto}
.reading-area h1{font-size:clamp(1.75rem,1.35rem + 1.15vw,3rem);line-height:1.35;font-weight:700}
.article-body>:first-child{margin-top:0}
.article-body .step-heading{margin:1.5em 0 .65em}
.article-body .step-heading h2{min-width:0;font-size:1.2em}
.article-body .step-number{width:1.7em;height:1.7em;flex-basis:1.7em;font-size:.85em}
.article-body .notice{font-size:.95em}
.article-body .notice h3{font-size:1.05em}
.article-body .notice p{margin:0}
.article-body .muted,.article-body figcaption{font-size:.875em}
.article-body .code-header{flex-wrap:wrap;font-size:.8em}
.article-body .code-header>span{min-width:0;overflow-wrap:anywhere}
.article-body .copy-button,.article-link>span{flex-shrink:0}
.article-body .code-block pre{max-width:100%;font-size:clamp(.875rem,.75rem + .3vw,1.0625rem)}
.reader-nav .chapter-link>span:last-child{min-width:0}
.reader-page .left-sidebar{min-width:0;overflow-x:hidden;-webkit-overflow-scrolling:touch;scrollbar-width:thin}
/* Reader content uses page scrolling; the sidebar and image viewer scroll independently. */
html{min-height:100%;scroll-padding-top:88px}
body{min-height:100vh;min-height:100svh}
html.modal-open{overflow:hidden}
.navigation-drawer[open]{display:flex;flex-direction:column}
.navigation-drawer .navigation>*{flex-shrink:0}
.drawer-header{flex:0 0 auto;background:var(--surface);padding-top:calc(18px + env(safe-area-inset-top,0px));padding-left:max(18px,env(safe-area-inset-left,0px))}
.drawer-header .icon-button{min-width:44px;min-height:44px}
.article-body .code-block pre{-webkit-overflow-scrolling:touch;overscroll-behavior-x:contain;touch-action:pan-x pan-y pinch-zoom}
.lightbox{width:min(1100px,calc(100vw - 24px));height:88vh;height:88dvh;max-width:calc(100vw - 24px);max-height:calc(100vh - 24px);max-height:calc(100dvh - 24px);margin:auto;padding:0;border:0;border-radius:12px;background:var(--surface);color:var(--ink);overflow:hidden}
.lightbox[open]{display:flex;flex-direction:column}
.lightbox-toolbar{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;flex:0 0 auto;gap:8px;padding:10px 14px;border-bottom:1px solid var(--line);background:var(--surface);font-size:.9rem}
.lightbox-actions{display:flex;flex-wrap:wrap;gap:8px}
.lightbox-close,.lightbox-size{min-height:44px;padding:8px 12px;border:1px solid var(--line);border-radius:8px;background:var(--surface);color:var(--ink);font-size:.875rem}
.lightbox-size[aria-pressed=true]{color:var(--blue);border-color:var(--blue);background:var(--blue-soft)}
.lightbox-viewport{flex:1 1 auto;min-width:0;min-height:0;overflow:auto;padding:12px;background:var(--soft);overscroll-behavior:contain;-webkit-overflow-scrolling:touch;touch-action:pan-x pan-y pinch-zoom}
.lightbox-viewport:focus-visible{outline:2px solid var(--blue);outline-offset:-2px}
.lightbox-viewport img{display:block;width:auto;height:auto;max-width:100%;max-height:none;margin:0 auto}
.lightbox.image-original .lightbox-viewport img{max-width:none;max-height:none}
.lightbox-caption{flex:0 0 auto;max-height:6rem;overflow:auto;overflow-wrap:anywhere;margin:0;padding:10px 14px;border-top:1px solid var(--line);font-size:.875rem;color:var(--muted)}
@media(max-width:960px){
  .reader-page .site-header{height:calc(68px + env(safe-area-inset-top,0px));min-height:calc(68px + env(safe-area-inset-top,0px));padding:calc(11px + env(safe-area-inset-top,0px)) max(14px,env(safe-area-inset-right,0px)) 11px max(14px,env(safe-area-inset-left,0px));gap:10px}
  .reader-page .header-start{flex:1;gap:8px}
  .reader-page .brand>span:last-child{max-width:none;display:-webkit-box;-webkit-box-orient:vertical;-webkit-line-clamp:2;overflow:hidden;line-height:1.3}
  .reader-page .reader-shell{display:grid;grid-template-columns:clamp(112px,32vw,220px) minmax(0,1fr);min-height:calc(100vh - 68px - env(safe-area-inset-top,0px));min-height:calc(100dvh - 68px - env(safe-area-inset-top,0px));height:auto;max-height:none;overflow:visible}
  .reader-page .left-sidebar{display:block;top:calc(68px + env(safe-area-inset-top,0px));height:calc(100vh - 68px - env(safe-area-inset-top,0px));height:calc(100dvh - 68px - env(safe-area-inset-top,0px));overflow-y:auto;overscroll-behavior-y:contain}
  .reader-page .reader-nav{padding:12px 5px max(16px,env(safe-area-inset-bottom,0px)) max(5px,env(safe-area-inset-left,0px))}
  .reader-page .reader-nav .chapter-link{gap:5px;min-height:48px;padding:10px 6px;font-size:clamp(1rem,2vw,1.125rem);font-weight:700;line-height:1.5}
  .reader-page .reader-nav .chapter-number{flex:0 0 auto;min-width:1.4em;font-size:.6875rem;line-height:1.6;padding-top:3px}
  .reader-page .reading-area{height:auto;max-height:none;overflow:visible;padding:22px clamp(12px,2.5vw,24px) max(40px,env(safe-area-inset-bottom,0px));padding-right:max(clamp(12px,2.5vw,24px),env(safe-area-inset-right,0px))}
  .reader-page .reading-area h1{font-size:clamp(1.5rem,3.5vw,2rem);overflow-wrap:anywhere}
  .reader-page .copy-button{min-height:44px;padding:7px 12px}
  .reader-page .article-body{font-size:clamp(1rem,2vw,1.125rem);line-height:1.9}
}
@media(max-width:760px){
  .lightbox{width:100%;max-width:100%;height:100vh;height:100dvh;max-height:100vh;max-height:100dvh;margin:0;border-radius:0;padding-bottom:env(safe-area-inset-bottom,0px)}
  .lightbox-toolbar{padding-top:calc(10px + env(safe-area-inset-top,0px));padding-left:max(12px,env(safe-area-inset-left,0px));padding-right:max(12px,env(safe-area-inset-right,0px))}
  .lightbox-viewport{padding:12px max(12px,env(safe-area-inset-right,0px)) 12px max(12px,env(safe-area-inset-left,0px))}
}
@media(prefers-reduced-motion:no-preference){html{scroll-behavior:smooth}.project-link,.chapter-link,.button{transition:background .15s,border-color .15s}}