/* Gachiakuta.eu V9 Aurora — reader and adaptive publication surfaces */
.reader-viewport.horizontal{display:flex;align-items:stretch;gap:18px;overflow-x:auto;overflow-y:hidden;scroll-snap-type:x mandatory;scroll-padding-inline:clamp(12px,6vw,90px);padding-inline:clamp(12px,6vw,90px)}
.reader-viewport.horizontal .page-group{flex:0 0 min(88vw,1000px);width:auto;min-height:100%;margin:0;scroll-snap-align:center;scroll-snap-stop:always;align-items:center}
.reader-viewport.horizontal .reader-page{max-height:calc(100dvh - 185px)}
.reader-viewport.horizontal .reader-page img,.reader-viewport.horizontal .reader-page video{max-height:calc(100dvh - 220px);width:auto;max-width:100%;margin:auto}
.reader-viewport.carousel{overflow:hidden;display:grid;place-items:center;background:linear-gradient(180deg,#e8edf7,#f2f5fb)}
.reader-viewport.carousel .page-group{animation:kione-carousel-in .22s ease both;margin:0;width:min(100%,1180px)}
.reader-trail-link{border-left:3px solid var(--blue,#354edc)!important}
#reader-trail[aria-pressed="true"]{background:var(--pastel-purple,#ece8ff);color:var(--blue,#354edc);border-color:color-mix(in srgb,var(--blue,#354edc) 30%,transparent)}
@keyframes kione-carousel-in{from{opacity:.3;transform:translateX(16px) scale(.99)}to{opacity:1;transform:none}}
@media(max-width:720px){.reader-viewport.horizontal .page-group{flex-basis:92vw}.reader-viewport.horizontal{scroll-padding-inline:4vw;padding-inline:4vw}.reader-viewport.carousel .page-group{width:100%}}
@media(prefers-reduced-motion:reduce){.reader-viewport.carousel .page-group{animation:none}}