/* Y7 cell game · the world and its panels (4 Nov 2026).
   Daniel: "Fantasyland inspired … make it magical … like you're diving into a new world". The world is always a night of
   jewel light; the panels follow the reader's bright or dark choice. Year 7 sizes (memory year7-text-and-instructions):
   page text 17–18 px, nothing a pupil must read under 15 px; what to press stands on the part, and is highlighted. */
:root{
  --serif:'Fraunces',Georgia,'Times New Roman',serif;
  --gold:#FFD27A; --gold2:#F0B43A; --night:#0B0F2A; --night2:#151a46; --glass:rgba(14,16,46,.78); --glass-rule:rgba(255,226,154,.38);
  --qp-bg:rgba(255,253,247,.97); --qp-ink:#1B1B33; --qp-ink2:#45476A; --qp-rule:#E4DDCB; --qp-accent:#6B3FD1; --qp-accent2:#4E2BB0;
}
:root[data-theme="dark"]{ --qp-bg:rgba(22,20,52,.96); --qp-ink:#EEF0FF; --qp-ink2:#C2C6E8; --qp-rule:#3A3A70; --qp-accent:#B79BFF; --qp-accent2:#D3C2FF }
@media (prefers-color-scheme:dark){ :root:not([data-theme="light"]){ --qp-bg:rgba(22,20,52,.96); --qp-ink:#EEF0FF; --qp-ink2:#C2C6E8; --qp-rule:#3A3A70; --qp-accent:#B79BFF; --qp-accent2:#D3C2FF } }

body{background:var(--page)}
.top{padding-bottom:8px}
.lg{display:inline}
@media (max-width:560px){ .lg{display:none} }

/* ---------- the stage: the world fills it ---------- */
.stage{position:relative;height:calc(100vh - 150px);height:calc(100svh - 150px);min-height:560px;max-height:1100px;margin:0 auto 18px;max-width:1800px;border-radius:22px;overflow:hidden;background:radial-gradient(120% 90% at 50% 20%,#1d1f5a 0%,#0b0f2a 70%);box-shadow:0 18px 50px rgba(10,12,40,.35);isolation:isolate}
:fullscreen .stage,.stage:fullscreen{height:100vh;max-height:none;border-radius:0;margin:0}
#world{position:absolute;inset:0;width:100%;height:100%;display:block;cursor:grab;touch-action:none}
#world:active{cursor:grabbing}
.loading{position:absolute;inset:0;display:grid;place-content:center;justify-items:center;gap:14px;background:radial-gradient(circle at 50% 45%,#2a2370,#0b0f2a 70%);color:#E8E4FF;font:700 18px/1.4 var(--sans);z-index:40;transition:opacity .6s}
.loading[hidden]{display:none}
.loading__orb{width:70px;height:70px;border-radius:50%;background:radial-gradient(circle at 35% 30%,#fff7d6,#FFD27A 30%,#8f7cff 70%,transparent 72%);box-shadow:0 0 40px #8f7cff;animation:orb 2.4s ease-in-out infinite}
@keyframes orb{50%{transform:scale(.82);box-shadow:0 0 18px #ffd27a}}
.loading p{margin:0;max-width:420px;text-align:center}

/* ---------- names on the world: level lines, shown only at rest ---------- */
.names{position:absolute;inset:0;pointer-events:none;z-index:5;opacity:0;transition:opacity .35s}
.names.on{opacity:1}
.names__lines{position:absolute;inset:0;width:100%;height:100%;overflow:visible}
.nml{stroke:rgba(255,226,154,.85);stroke-width:1.6}
.nml.is-asleep{stroke:rgba(196,190,255,.55);stroke-dasharray:4 4}
.nml.is-done{stroke:rgba(140,240,200,.85)}
.nm{position:absolute;transform:translateY(-50%);display:inline-flex;flex-wrap:wrap;align-items:center;gap:4px 7px;max-width:205px;padding:7px 13px;border-radius:18px;font:800 16px/1.15 var(--sans);color:#FFF8E6;background:var(--glass);border:1.5px solid var(--glass-rule);box-shadow:0 4px 18px rgba(0,0,0,.35),inset 0 0 14px rgba(255,210,122,.12);backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px)}
button.nm{pointer-events:auto;cursor:pointer}
.nm--L{flex-direction:row-reverse}
.nm.is-open{border-color:var(--gold);box-shadow:0 0 0 0 rgba(255,210,122,.6),0 4px 18px rgba(0,0,0,.35);animation:awake 2.2s ease-out infinite}
@keyframes awake{0%{box-shadow:0 0 0 0 rgba(255,210,122,.55),0 4px 18px rgba(0,0,0,.35)}80%,100%{box-shadow:0 0 0 12px rgba(255,210,122,0),0 4px 18px rgba(0,0,0,.35)}}
.nm--on{font-size:15px;padding:4px 9px;gap:4px;max-width:160px}
.nm--on .ico{width:15px;height:15px}
.nm.is-asleep{color:#CFCBF5;background:rgba(30,28,70,.62);border-style:dashed;border-color:rgba(196,190,255,.5)}
.nm.is-done{border-color:#8CF0C8;color:#E9FFF6}
.nm__s{color:var(--gold)}
button.nm:hover,button.nm:focus-visible{background:rgba(40,36,110,.92);outline:2.5px solid var(--gold);outline-offset:2px}
@media (prefers-reduced-motion:reduce){ .nm.is-open{animation:none} }

/* ---------- buttons on the world (they stand on the part they act on) ---------- */
.hots{position:absolute;inset:0;pointer-events:none;z-index:8}
.hot3{position:absolute;left:0;top:0;pointer-events:none;will-change:transform}
.hot3__b{position:absolute;pointer-events:auto;display:inline-flex;align-items:center;gap:7px;white-space:nowrap;font:900 17px/1.1 var(--sans);color:#2B1A00;background:linear-gradient(180deg,#FFE7A8,#FFC95E);border:2px solid #FFF6D6;border-radius:999px;padding:9px 16px;cursor:pointer;box-shadow:0 0 0 0 rgba(255,214,110,.7),0 6px 18px rgba(0,0,0,.4);animation:hotPulse 1.8s ease-out infinite}
.hot3--c .hot3__b{transform:translate(-50%,-50%)} .hot3--t .hot3__b{transform:translate(-50%,-100%)} .hot3--b .hot3__b{transform:translate(-50%,0)}
.hot3--r .hot3__b{transform:translate(8px,-50%)} .hot3--l .hot3__b{transform:translate(calc(-100% - 8px),-50%)}
.hot3__b:hover,.hot3__b:focus-visible{background:linear-gradient(180deg,#FFF1C8,#FFD27A);outline:3px solid #fff;outline-offset:2px}
.hot3__b .ico{width:22px;height:22px}
@keyframes hotPulse{0%{box-shadow:0 0 0 0 rgba(255,214,110,.7),0 6px 18px rgba(0,0,0,.4)}75%,100%{box-shadow:0 0 0 14px rgba(255,214,110,0),0 6px 18px rgba(0,0,0,.4)}}
.hot3.tok .hot3__b{font-size:16px;padding:7px 12px;color:#0E2230;background:linear-gradient(180deg,#E8FBFF,#B9EEFF);border-color:#fff}
.hot3.tag .hot3__b{animation:none;cursor:default;font-size:15.5px;padding:6px 12px;color:#FFF8E6;background:var(--glass);border:1.5px solid var(--glass-rule)}
.hot3.tag.y7 .hot3__b{border-color:var(--gold);color:#FFE7A8}
.hot3.code .hot3__b,.hot3.count .hot3__b{animation:none;cursor:default;color:#FFF8E6;background:rgba(20,22,60,.9);border-color:#9FF3FF}
.hot3.q3 .hot3__b{min-width:44px;justify-content:center}
.hot3 .hot3__b.no,.hot3__b:disabled{animation:none}
.hot3.big .hot3__b{font-size:19px;padding:12px 22px}
.hot3.edge .hot3__b{outline:2px dashed #fff;outline-offset:3px}
.sym{font-size:20px;line-height:1}
.sym.s0{color:#2E9F84} .sym.s1{color:#3F6FD8} .sym.s2{color:#C9741E} .sym.s3{color:#B8458A}
.hot3.code .sym.s0,.hot3.count .sym.s0{color:#5BC8A8} .hot3.code .sym.s1{color:#7FA8FF} .hot3.code .sym.s2{color:#F2A65A} .hot3.code .sym.s3{color:#E36FB0}
@media (prefers-reduced-motion:reduce){ .hot3__b{animation:none} }

/* ---------- the bag and the tools ---------- */
.hud{position:absolute;left:14px;top:14px;z-index:9;display:flex;flex-direction:column;gap:8px;align-items:flex-start;max-width:min(400px,36%)}
.bag{background:var(--glass);border:1.5px solid var(--glass-rule);border-radius:18px;padding:10px 12px;color:#FFF8E6;backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);box-shadow:0 6px 24px rgba(0,0,0,.35)}
.bag.pop{animation:bagPop .5s ease-out}
@keyframes bagPop{40%{transform:scale(1.06)}}
.bag__e{display:flex;align-items:center;gap:10px;font-size:15px}
.bag__ek{display:inline-flex;align-items:center;gap:5px;font-weight:800}
.bag__ek .ico{width:20px;height:20px}
.bag__bar{flex:1;min-width:120px;height:12px;border-radius:99px;background:rgba(255,255,255,.14);overflow:hidden;border:1px solid rgba(255,255,255,.2)}
.bag__bar i{display:block;height:100%;background:linear-gradient(90deg,#FFE39A,#FFB347);border-radius:99px;transition:width .8s}
.bag.low .bag__bar i{background:linear-gradient(90deg,#FF8A7A,#E0533F)}
.bag__items{display:flex;flex-wrap:wrap;gap:6px;margin-top:8px}
.bag__it{display:inline-flex;align-items:center;gap:6px;font:700 15px/1.2 var(--sans);background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.18);border-radius:999px;padding:4px 10px 4px 5px}
.bag__it .ico{width:22px;height:22px}
.bag__none{font-size:15px;color:#CFCBF5}
.tools{display:flex;gap:6px;flex-wrap:wrap}
.tool{font:800 15px/1 var(--sans);color:#FFF8E6;background:var(--glass);border:1.5px solid var(--glass-rule);border-radius:999px;padding:9px 13px;cursor:pointer}
.tool:hover,.tool:focus-visible{border-color:var(--gold)}
.wbbtn{flex:none;font:800 15.5px/1 var(--sans);color:#2B1A00;background:linear-gradient(180deg,#FFE7A8,#FFC95E);border:0;border-radius:100px;padding:10px 15px;cursor:pointer;display:inline-flex;gap:7px;align-items:center}
.wbbtn .lang{font-weight:700;opacity:.85;font-size:13.5px}
.flyer{position:fixed;z-index:70;width:44px;height:44px;margin:-22px 0 0 -22px;pointer-events:none;transition:left .85s cubic-bezier(.5,.05,.4,1),top .85s cubic-bezier(.5,.05,.4,1),transform .85s;filter:drop-shadow(0 0 10px #FFE39A)}
.flyer .ico{width:44px;height:44px}
.flyer.go{transform:scale(.6)}
.toasts{position:absolute;top:14px;left:50%;transform:translateX(-50%);z-index:12;display:flex;flex-direction:column;gap:6px;align-items:center;pointer-events:none}
.toast{font:800 17px/1.3 var(--sans);color:#2B1A00;background:linear-gradient(180deg,#FFF1C8,#FFD27A);border-radius:999px;padding:9px 18px;box-shadow:0 6px 24px rgba(0,0,0,.35);animation:toastIn .4s ease-out;transition:opacity .6s,transform .6s}
.toast.out{opacity:0;transform:translateY(-8px)}
@keyframes toastIn{from{opacity:0;transform:translateY(-8px)}}

/* ---------- the quest panel: the pupil's book ---------- */
.quest{position:absolute;z-index:10;top:14px;right:14px;bottom:14px;width:min(430px,38%);overflow-y:auto;overscroll-behavior:contain;background:var(--qp-bg);color:var(--qp-ink);border-radius:20px;border:1.5px solid rgba(255,210,122,.55);box-shadow:0 18px 50px rgba(0,0,0,.4);padding:18px 20px 22px;font-size:17px;line-height:1.55;scrollbar-width:thin}
.quest:empty{display:none}
.qp__eyebrow,.qp__k{font:900 13px/1 var(--sans);letter-spacing:.14em;text-transform:uppercase;color:var(--qp-accent);margin:0 0 6px}
.qp__k{margin:22px 0 8px}
.qp__title{font:800 27px/1.15 var(--serif);margin:2px 0 8px;letter-spacing:-.005em}
.qp__lead{margin:0 0 12px}
.qp__note{font-size:15px;color:var(--qp-ink2);margin:14px 0 0}
.qp__top{display:flex;align-items:center;justify-content:space-between;gap:10px;margin:0 0 6px;flex-wrap:wrap}
.qp__back,.qp__mapbtn{font:800 15px/1 var(--sans);color:var(--qp-accent2);background:none;border:1.5px solid var(--qp-rule);border-radius:999px;padding:8px 13px;cursor:pointer}
.qp__back:hover,.qp__mapbtn:hover{border-color:var(--qp-accent)}
.qp__kind{font:800 13.5px/1.2 var(--sans);color:var(--qp-ink2);background:color-mix(in srgb,var(--qp-accent) 10%,transparent);border-radius:999px;padding:6px 10px}
.qp__def{border:1.5px solid color-mix(in srgb,var(--qp-accent) 35%,transparent);border-left:6px solid var(--qp-accent);border-radius:12px;padding:8px 12px;margin:6px 0 12px;background:color-mix(in srgb,var(--qp-accent) 6%,transparent)}
.qp__def p{margin:4px 0 0}
.qp__y7,.qp__x{display:inline-block;font:900 12.5px/1 var(--sans);letter-spacing:.1em;text-transform:uppercase;border-radius:6px;padding:4px 7px}
.qp__y7{color:#5A3B00;background:#FFE39A}
.qp__x{color:#fff;background:var(--qp-accent)}
.qp__intro{margin:0 0 12px}
.steps{list-style:none;margin:0;padding:0;counter-reset:st}
.step{position:relative;padding:10px 12px 10px 42px;margin:0 0 8px;border-radius:14px;border:1.5px solid var(--qp-rule);counter-increment:st}
.step::before{content:counter(st);position:absolute;left:10px;top:10px;width:24px;height:24px;border-radius:50%;display:grid;place-items:center;font:900 14px/1 var(--sans);color:#fff;background:var(--qp-ink2)}
.step.is-now{border-color:var(--qp-accent);background:color-mix(in srgb,var(--qp-accent) 7%,transparent);box-shadow:0 0 0 3px color-mix(in srgb,var(--qp-accent) 18%,transparent)}
.step.is-now::before{background:var(--qp-accent)}
.step.is-done{opacity:.8}
.step.is-done::before{content:"✓";background:#2E9F64}
.step__t p{margin:0}
.step__do{display:flex;flex-wrap:wrap;gap:8px;margin-top:8px}
.step__do:empty{display:none}
.step__say{margin:8px 0 0;font-size:16.5px}
.step__say:empty{display:none}
.step__say.ok{color:#1E7A4A;font-weight:700}
.step__say.no{color:#A14A10}
:root[data-theme="dark"] .step__say.ok{color:#7EE2AC} :root[data-theme="dark"] .step__say.no{color:#FFB27A}
@media (prefers-color-scheme:dark){ :root:not([data-theme="light"]) .step__say.ok{color:#7EE2AC} :root:not([data-theme="light"]) .step__say.no{color:#FFB27A} }
.btn.next{font:900 16.5px/1 var(--sans);color:#fff;background:var(--qp-accent);border:0;border-radius:999px;padding:12px 18px;cursor:pointer}
.btn.next:hover{background:var(--qp-accent2)}
.btn.next.pulse{animation:nextPulse 1.8s ease-out infinite}
@keyframes nextPulse{0%{box-shadow:0 0 0 0 color-mix(in srgb,var(--qp-accent) 60%,transparent)}80%,100%{box-shadow:0 0 0 12px transparent}}
@media (prefers-reduced-motion:reduce){ .btn.next.pulse{animation:none} }
.choices{display:flex;flex-direction:column;gap:6px;width:100%}
.choice{display:flex;gap:10px;align-items:flex-start;text-align:left;font:700 16.5px/1.35 var(--sans);color:var(--qp-ink);background:color-mix(in srgb,var(--qp-ink) 4%,transparent);border:1.5px solid var(--qp-rule);border-radius:12px;padding:10px 12px;cursor:pointer}
.choice .lt{flex:none;display:inline-grid;place-items:center;width:24px;height:24px;border-radius:7px;background:var(--qp-ink2);color:#fff;font:900 13px/1 var(--sans)}
.choice:hover:not(:disabled){border-color:var(--qp-accent)}
.choice.yes{border-color:#2E9F64;background:color-mix(in srgb,#2E9F64 12%,transparent)}
.choice.no{border-color:#C26A2A;background:color-mix(in srgb,#C26A2A 10%,transparent);opacity:.85}
.choice:disabled{cursor:default}
.qp__end{margin-top:14px}
.qp__done{display:flex;gap:10px;align-items:flex-start;background:linear-gradient(135deg,rgba(255,231,168,.55),rgba(255,210,122,.25));border:1.5px solid #F0C35A;border-radius:14px;padding:10px 12px;color:var(--qp-ink)}
.qp__done .ico{width:28px;height:28px;flex:none}
.qp__done p{margin:0}
.fact{margin:12px 0 0;border-radius:14px;padding:10px 14px;background:radial-gradient(120% 120% at 0% 0%,rgba(143,124,255,.22),transparent 60%),color-mix(in srgb,var(--qp-accent) 6%,transparent);border:1.5px dashed color-mix(in srgb,var(--qp-accent) 45%,transparent)}
.fact__k{font:900 13px/1 var(--sans);letter-spacing:.12em;text-transform:uppercase;color:var(--qp-accent);margin:0 0 4px}
.fact p{margin:0}
.fact__src{font-size:13px;color:var(--qp-ink2);margin-top:4px!important}
.qp__real{margin:14px 0 0;width:100%;font:900 16.5px/1.2 var(--sans);color:#1B1240;background:linear-gradient(180deg,#E9E2FF,#CDBDF7);border:1.5px solid #B9A6FF;border-radius:14px;padding:12px 14px;cursor:pointer;text-align:left}
.qp__real:hover{border-color:var(--qp-accent)}
.qp__nav{margin-top:18px;display:flex;justify-content:flex-end}
.pls{list-style:none;margin:8px 0 0;padding:0;display:flex;flex-direction:column;gap:6px}
.pl button{width:100%;text-align:left;display:flex;flex-direction:column;gap:2px;background:none;border:1.5px solid var(--qp-rule);border-radius:14px;padding:9px 12px;cursor:pointer;color:var(--qp-ink);font:inherit}
.pl__n{font:800 17px/1.2 var(--sans)}
.pl__s{font-size:15px;color:var(--qp-ink2)}
.pl.is-open button{border-color:#E0B000;background:color-mix(in srgb,#FFD27A 16%,transparent)}
.pl.is-open .pl__s{color:#8A5A00;font-weight:800}
:root[data-theme="dark"] .pl.is-open .pl__s{color:#FFD27A}
@media (prefers-color-scheme:dark){ :root:not([data-theme="light"]) .pl.is-open .pl__s{color:#FFD27A} }
.pl.is-done .pl__s{color:#1E7A4A}
.pl.is-asleep button{border-style:dashed;cursor:help}
.asleep{margin:6px 2px 2px;font-size:15.5px;color:var(--qp-ink2);background:color-mix(in srgb,var(--qp-accent) 8%,transparent);border-radius:10px;padding:7px 10px}
/* the checks inside the panel: the KS3 checks' look, on the panel's paper */
.quest .q{background:var(--sheet);color:var(--ink);border-radius:14px;margin:0 0 12px}

/* ---------- the starch test ---------- */
.testbox{position:absolute;z-index:9;left:14px;top:14px;right:calc(min(430px,38%) + 28px);bottom:14px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px;overflow-y:auto;background:radial-gradient(circle at 50% 40%,rgba(40,34,110,.92),rgba(11,15,42,.97));border-radius:18px;padding:18px}
.testbox[hidden]{display:none}
.tile{margin:0;width:min(560px,100%);text-align:center;color:#E8EDF4}
.tile svg{width:100%;height:auto}
.tile figcaption{font-size:16px;margin-top:8px}
.win{display:flex;flex-direction:column;align-items:center;gap:6px;color:#FFF8E6;font-size:17.5px;text-align:center;animation:winIn .8s ease-out}
.win p{margin:0;max-width:520px}
.win__t{font:800 30px/1.1 var(--serif);color:#FFE39A;text-shadow:0 0 18px rgba(255,210,122,.7)}
.win__star .ico{width:64px;height:64px;filter:drop-shadow(0 0 16px #FFD27A);animation:winStar 2.4s ease-in-out infinite}
.win__path{list-style:none;display:flex;flex-wrap:wrap;justify-content:center;gap:6px;margin:6px 0 4px;padding:0}
.win__path li{display:inline-flex;align-items:center;gap:5px;font:700 15px/1.2 var(--sans);background:rgba(255,255,255,.08);border:1px solid rgba(255,226,154,.4);border-radius:999px;padding:4px 10px 4px 5px}
.win__path li:not(:last-child)::after{content:"→";margin-left:4px;color:#FFE39A}
.win__path .ico{width:22px;height:22px}
@keyframes winIn{from{opacity:0;transform:translateY(10px) scale(.96)}}
@keyframes winStar{50%{transform:scale(1.12) rotate(8deg)}}
@media (prefers-reduced-motion:reduce){ .win,.win__star .ico{animation:none} }
.win .btn{font:900 16.5px/1 var(--sans);color:#2B1A00;background:linear-gradient(180deg,#FFE7A8,#FFC95E);border:0;border-radius:999px;padding:12px 20px;cursor:pointer}

/* ---------- the cell as Year 7 pupils draw it: in the panel, beside the 3D cell with the same five parts lit ---------- */
.simple{margin:4px 0 14px;background:#FFFDF7;color:#1B1B33;border-radius:14px;border:1.5px solid #F0C35A;padding:10px 12px 8px}
.simple svg{display:block;width:100%;height:auto}
.simple__k{font:900 13px/1 var(--sans);letter-spacing:.12em;text-transform:uppercase;color:#6B3FD1;margin:2px 0 6px}
.simple figcaption{font-size:13px;color:#45476A;margin-top:4px}

/* ---------- the dive: a picture that moves in, then the 3D bunch of cells ---------- */
.intro{position:absolute;inset:0;z-index:35;display:grid;grid-template-columns:minmax(0,1.5fr) minmax(300px,1fr);gap:20px;align-items:center;padding:24px;background:radial-gradient(120% 100% at 30% 30%,#241f66,#0b0f2a 75%);transition:background .9s,opacity .7s}
.intro[hidden]{display:none}
.intro.is-world{background:linear-gradient(90deg,rgba(11,15,42,0) 0%,rgba(11,15,42,0) 55%,rgba(11,15,42,.55) 75%)}
.intro.is-world{grid-template-columns:minmax(0,1.5fr) minmax(300px,1fr)}
.intro.out{opacity:0}
.intro__pic{margin:0;align-self:stretch;display:flex;flex-direction:column;justify-content:center;min-height:0;overflow:hidden;border-radius:18px;background:#0b0f2a}
.intro__pic picture{display:block;min-height:0;flex:1;overflow:hidden;border-radius:18px}
.intro__pic img{display:block;width:100%;height:100%;object-fit:contain;transition:transform 1.5s cubic-bezier(.6,.05,.4,1),opacity 1.5s}
.intro.fading .intro__pic img{opacity:.15}
.intro__pic figcaption{font-size:13px;color:#B9B5E8;margin-top:6px}
.intro__card{grid-column:2;background:var(--qp-bg);color:var(--qp-ink);border-radius:20px;border:1.5px solid rgba(255,210,122,.6);padding:20px 22px;box-shadow:0 18px 50px rgba(0,0,0,.45)}
.intro__n{font:900 13px/1 var(--sans);letter-spacing:.14em;text-transform:uppercase;color:var(--qp-accent);margin:0 0 8px}
.intro__t{font-size:19px;line-height:1.55;margin:0 0 14px}
@media (max-width:860px){
  /* the card first, at the top of the picture: on a phone the foot of the stage is below the first screen */
  .intro{grid-template-columns:1fr;grid-template-rows:auto minmax(0,1fr);padding:12px}
  .intro__card{grid-column:1;grid-row:1}
  .intro__pic{grid-row:2}
  .intro.is-world{grid-template-columns:1fr;grid-template-rows:auto 1fr;align-items:start;background:linear-gradient(0deg,rgba(11,15,42,0) 50%,rgba(11,15,42,.6))}
  .intro__t{font-size:17.5px}
}

/* ---------- See the real thing ---------- */
.lens{position:absolute;inset:0;z-index:30;background:rgba(6,8,26,.72);display:grid;place-items:center;padding:20px}
.lens[hidden]{display:none}
.lens__card{width:min(820px,100%);max-height:100%;overflow-y:auto;background:var(--qp-bg);color:var(--qp-ink);border-radius:20px;border:1.5px solid #B9A6FF;padding:16px 20px 20px;box-shadow:0 24px 60px rgba(0,0,0,.5)}
.lens__top{display:flex;justify-content:space-between;align-items:center;gap:12px}
.lens__top h2{font:800 24px/1.2 var(--serif);margin:0}
.lens__both{margin:8px 0 12px;font-size:16.5px}
.lens__tabs{display:flex;gap:6px;flex-wrap:wrap;margin:0 0 10px}
.lens__tabs button{font:800 15px/1 var(--sans);color:var(--qp-ink2);background:none;border:1.5px solid var(--qp-rule);border-radius:999px;padding:9px 14px;cursor:pointer}
.lens__tabs button[aria-selected="true"]{color:#fff;background:var(--qp-accent);border-color:var(--qp-accent)}
.lens__fig{margin:0 0 12px}
.lens__fig svg,.lens__fig img{display:block;width:100%;height:auto;border-radius:12px;background:#fff}
.lens__fig figcaption{font-size:15.5px;margin-top:6px;color:var(--qp-ink)}
.lens__cr{display:block;font-size:13px;color:var(--qp-ink2);margin-top:2px}
.lens__size{font-size:17px;margin:0 0 10px}
.lens__3d{position:relative;min-height:260px;border-radius:12px;background:radial-gradient(circle at 50% 40%,#22265e,#0b0f2a);overflow:hidden}
.lens__3d canvas{display:block;width:100%;touch-action:none}
.lens__wait{position:absolute;inset:0;display:grid;place-items:center;margin:0;color:#E8E4FF;font-weight:700}
.lens__wait[hidden]{display:none}
.lens__cap{font-size:15.5px;margin:8px 0 2px}

/* ---------- under the stage ---------- */
.about{max-width:1480px;margin:0 auto;padding:6px 24px 10px}
.about h2{font:800 24px/1.2 var(--serif);margin:6px 0 8px}
.about__grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.about h3{font:900 14px/1 var(--sans);letter-spacing:.12em;text-transform:uppercase;color:var(--accent-ink);margin:8px 0 6px}
.about p{margin:0;font-size:16.5px;color:var(--ink2)}

/* ---------- a phone, or a narrow window: the world above, the book below as a sheet ---------- */
@media (max-width:860px){
  .stage{height:calc(100svh - 120px);min-height:620px;border-radius:16px;margin:0 8px 14px}
  .quest{top:auto;left:0;right:0;bottom:0;width:auto;max-height:50%;border-radius:18px 18px 0 0;padding:14px 14px 18px;border-width:1.5px 0 0;overscroll-behavior:auto}   /* at its top, a swipe scrolls the page back up to the heading */
  .quest.is-map{max-height:36%}
  .hud{top:10px;bottom:auto;left:10px;max-width:calc(100% - 20px)}
  .bag{padding:7px 10px}
  .bag__items{margin-top:5px}
  .bag__it span{max-width:150px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
  .nm{font-size:14.5px;padding:5px 10px;max-width:180px}
  .testbox{right:14px;bottom:52%}
  .about__grid{grid-template-columns:1fr}
  .qp__title{font-size:23px}
  .toasts{top:auto;bottom:calc(50% + 10px)}
}
@media (max-width:980px){
  .upbar{flex-wrap:wrap}
  .upbar .lessonbar{order:3;flex-basis:100%}
}
@media (max-width:560px){
  .bag__it span{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}   /* icons only; read aloud */
  .bag__it{padding:3px}
  .bag__none{font-size:14px}
  .bag__bar{min-width:80px}
  .top{padding:8px 12px 2px}
  .head h1{font-size:21px}
  .eyebrow{font-size:12px}
  .by{font-size:14.5px}
  .timing{display:none}
  .tool{display:none}
  .stage{height:calc(100svh - 16px);min-height:560px;margin:0 6px 14px}
}