/* Sky palette, fine speckles and symbols from the home page. */
body#portal-page.portal-unified.portal-sky-bg,body#top.portal-unified.portal-sky-bg,body.portal-sky-bg{isolation:isolate;background:radial-gradient(circle at 78% 9%,rgba(255,255,255,.6),transparent 26%),radial-gradient(circle at 8% 35%,rgba(255,255,255,.3),transparent 29%),linear-gradient(180deg,#b9e3f7 0%,#88cbed 34%,#56b3e2 67%,#258dcc 100%)!important;
 background-attachment:fixed!important}
body.portal-sky-bg>:is(.bg,.bg-grid,.math-ambience){display:none!important}
/* Keep all decorations in the upper gap and outer page margins. */
.portal-sky-scene{position:fixed;inset:0;z-index:-1;overflow:hidden;pointer-events:none;isolation:isolate;--sky-gutter:calc(max(0px,(100vw - 1360px)/2) + clamp(20px,4vw,58px) - 14px)}
.portal-sky-edge{position:absolute;display:flex;align-items:center;justify-content:space-around}
.portal-sky-left,.portal-sky-right{top:140px;bottom:24px;width:var(--sky-gutter);flex-direction:column}
.portal-sky-left{left:0}.portal-sky-right{right:0}
.portal-sky-top{top:82px;left:12%;right:12%;height:40px}
.portal-sky-edge span{position:relative;display:grid;place-items:center;width:32px;height:40px;flex:0 0 auto;font:normal 18px/1 Georgia,serif;color:rgba(4,61,109,.11);text-align:center;user-select:none;visibility:hidden}
.portal-sky-edge span::before,.portal-sky-edge span::after{content:"";position:absolute;width:2px;height:2px;border-radius:50%}
.portal-sky-edge span::before{left:5px;top:3px;background:rgba(255,255,255,.64)}
.portal-sky-edge span::after{right:5px;bottom:3px;background:rgba(36,127,175,.24)}
.portal-sky-scene,.portal-sky-scene::before,.portal-sky-scene::after,.portal-sky-scene *{animation:none!important;transition:none!important;transform:none!important;will-change:auto!important}
@media(max-width:1100px){.portal-sky-left,.portal-sky-right{display:none}.portal-sky-top{left:5%;right:5%}}
@media(max-width:760px){.portal-sky-top{top:80px;left:4%;right:4%}.portal-sky-edge span{font-size:16px}}
@media(max-height:500px){.portal-sky-left,.portal-sky-right{display:none}}
body.portal-sky-bg .teacher-channel{white-space:normal!important;text-align:center;max-width:100%;height:auto!important;min-height:48px;line-height:1.35!important}
body.portal-sky-bg .teacher-channel span{min-width:0}
body.portal-sky-bg .teacher-channel svg{flex-shrink:0}
body.portal-sky-bg .about-card .actions{flex-wrap:wrap}
body.portal-sky-bg .about-card .actions .btn{white-space:normal!important;text-align:center;max-width:100%;height:auto;min-height:44px;line-height:1.35}