/* Fluid layouts: preserve readable content instead of scaling the entire page. */
html{scroll-padding-bottom:100px;-webkit-text-size-adjust:100%;text-size-adjust:100%}
.app-shell,.workspace,main,.card,.topic-card,.day-card,.stat,.hero>*,.two-col>*,.part-row>*,.review-item>*,.field{min-width:0}
main{width:100%;padding-inline:clamp(16px,3vw,42px)}
h1,h2,h3,p,a,button,summary,label,.tag,.question-ref{overflow-wrap:anywhere}
img,svg,video,canvas{max-width:100%;height:auto}iframe,object,embed{max-width:100%}
input,select,textarea,button,.btn{max-width:100%}input,select,textarea{font-size:max(16px,var(--base))}
.btn,.tab{white-space:normal;text-align:center}.row>*{min-width:0}
.guide-reader,.npq-notes,.qr-reader,.qr-question{max-width:100%;min-width:0}
.guide-table{max-width:100%;overflow-x:auto;overscroll-behavior-inline:contain;-webkit-overflow-scrolling:touch}
.guide-reader pre{max-width:100%;overflow-x:auto}.guide-reader table{border-collapse:collapse}
.sidebar{overflow-y:auto;overscroll-behavior:contain}.sidebar .brand,.sidebar nav,.side-bottom{flex-shrink:0}
.side-bottom{padding-bottom:16px}.app-footer{overflow-wrap:anywhere}
dialog{max-height:88vh;max-height:88dvh;max-width:min(760px,calc(100vw - 24px));padding:clamp(16px,3vw,28px)}
dialog .dialog-head>*{min-width:0}dialog input:not([type=checkbox]):not([type=radio]){max-width:100%}
.paper-question-grid{grid-template-columns:repeat(auto-fill,minmax(48px,1fr))}.paper-q{min-height:44px}
.qr-controls{grid-template-columns:repeat(auto-fit,minmax(min(100%,220px),1fr))}
.npq-filters{grid-template-columns:minmax(0,2fr) minmax(0,1fr)}
.qr-pagination,.npq-pagination{flex-wrap:wrap}.qr-pagination>*,.npq-pagination>*{max-width:100%}
@media screen and (min-width:720px) and (max-width:1100px){
 .topic-grid,.paper-grid,.day-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media screen and (max-width:900px){
 .workspace{padding-bottom:calc(80px + env(safe-area-inset-bottom,0px))}
 .topbar{padding-top:calc(12px + env(safe-area-inset-top,0px));gap:10px;flex-wrap:wrap}
 .top-actions{margin-left:auto;min-width:0;flex-wrap:wrap;justify-content:flex-end}
 .mobile-nav{grid-template-columns:repeat(7,minmax(0,1fr));padding-inline:env(safe-area-inset-left,0px) env(safe-area-inset-right,0px)}
 .mobile-nav a{font-size:clamp(9px,1.7vw,11px);line-height:1.25;text-align:center;min-height:64px;gap:3px;padding-inline:2px}
 .mobile-nav a>span:last-child{max-width:100%;overflow-wrap:anywhere}.nav-icon{flex-shrink:0}
 .card,.topic-card,.day-card,.question-card{padding:clamp(16px,3.2vw,25px)}
 .app-footer{padding-inline:20px;gap:10px}.hero h2{font-size:clamp(25px,4vw,34px)}
 h1{font-size:clamp(26px,4.5vw,36px);line-height:1.2}
 .hero .row>.btn{flex:1 1 180px}.toolbar .field{flex:1 1 180px}
}
@media screen and (max-width:600px){
 .npq-filters,.qr-controls{grid-template-columns:minmax(0,1fr)}
 .toolbar{gap:16px}.toolbar .field,.toolbar>.btn{width:100%;flex-basis:100%}
 .session-header,.section-head,.dialog-head{flex-wrap:wrap}.dialog-head .icon-btn{margin-left:auto}
 .part-row{grid-template-columns:36px minmax(0,1fr);gap:12px}.part-icon{width:36px;height:36px}.part-row>.btn{grid-column:2;justify-self:start}
 .qr-entry .row{width:100%}.qr-entry .row>.btn{flex:1 1 100%}
 .npq-toolbar>*{width:100%}.qr-option{padding:12px;gap:10px}
 .question-actions>.btn{flex-basis:130px}.rating .btn{min-width:0;flex-basis:120px}
 .stats{gap:10px}.stat{padding:15px}.stat strong{font-size:clamp(23px,6vw,30px)}
}
@media screen and (max-width:360px){
 main{padding-inline:12px}.hero,.dark .hero{padding:20px}.topbar{padding-inline:12px}
 .mobile-brand{font-size:16px}.status-chip{max-width:74px}.top-actions{gap:6px}
 .tabs{gap:8px}.tab{padding:10px 12px;font-size:12px}.btn{padding-inline:14px}
 .session-header .row{width:100%}.question-actions .bookmark{width:100%}
}
@media screen and (max-height:500px) and (max-width:900px) and (orientation:landscape){
 .mobile-nav a{min-height:52px}.mobile-nav .nav-icon{font-size:18px}.workspace{padding-bottom:calc(64px + env(safe-area-inset-bottom,0px))}
 .topbar{min-height:56px;padding-block:8px}main{padding-top:20px}dialog{max-height:90dvh}
}
@media screen and (min-width:901px) and (max-height:740px){.brand{margin-bottom:24px}.sidebar{padding-top:20px}.sidebar nav{gap:4px}.nav-link{padding-block:10px}.side-bottom{padding-top:16px}}
@media(pointer:coarse){.text-btn,.inline-link,details summary{min-height:44px}.queue-dot{width:44px;height:44px}.day-check{min-height:44px}}