:root{--brand:#005ea2;--ink:#1b1b1b;--muted:#4a4a4a;--line:#71767a;--soft:#f0f4f8;--bg:#fff;--card:#fff;--link:#005ea2;--err:#b50909;--errbg:#fff5f5;--ok:#1a6b2c;--okbg:#f0faf2;--warn:#7a4b00;--warnbg:#fff8ec;--accent:#e5a000;--focus:#2491ff;--r:8px}
@media (prefers-color-scheme:dark){:root:not([data-theme=light]){--ink:#f0f0f0;--muted:#c9ced3;--line:#8d949b;--soft:#1f2933;--bg:#12181f;--card:#1a222b;--link:#7fb8ef;--err:#ff8a8a;--errbg:#3a1b1b;--ok:#7fd48f;--okbg:#17301d;--warn:#f5c26b;--warnbg:#33260f;--focus:#7fb8ef}}
*{box-sizing:border-box}
html{font-size:100%}
body{margin:0;font-family:system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;line-height:1.55;color:var(--ink);background:var(--bg)}
a{color:var(--link);text-decoration:underline}
a:hover{text-decoration-thickness:2px}
:focus-visible{outline:3px solid var(--focus);outline-offset:2px}
.skip{position:absolute;left:-999px;top:0;background:#fff;color:#000;padding:.75rem 1rem;z-index:100;border:2px solid #000}
.skip:focus{left:8px;top:8px}
header.bar{background:var(--brand);color:#fff;display:flex;flex-wrap:wrap;align-items:center;gap:.5rem 1.25rem;padding:.6rem 1rem}
header.bar a{color:#fff}
header.bar .brand{display:flex;align-items:center;gap:.6rem;font-weight:700;font-size:1.15rem;text-decoration:none}
header.bar .brand img{height:36px;max-width:140px;object-fit:contain;background:#fff;border-radius:4px;padding:2px}
header.bar nav{display:flex;flex-wrap:wrap;gap:.25rem 1rem;margin-left:auto;align-items:center}
header.bar nav a,header.bar nav button{color:#fff;background:none;border:0;border-bottom:3px solid transparent;border-radius:0;font:inherit;text-decoration:none;padding:.5rem .6rem;cursor:pointer;min-height:44px}
header.bar nav a:hover,header.bar nav button:hover{border-bottom-color:rgba(255,255,255,.6)}
header.bar nav a[aria-current=page]{font-weight:700;border-bottom-color:var(--accent)}
main{max-width:1100px;margin:0 auto;padding:1rem}
h1{font-size:1.6rem;margin:.8rem 0 .6rem}
h2{font-size:1.3rem;margin:1.4rem 0 .5rem}
h3{font-size:1.1rem;margin:1rem 0 .4rem}
p{margin:.5rem 0}
.muted{color:var(--muted)}
.card{border:1px solid var(--line);border-radius:var(--r);padding:1rem;margin:.8rem 0;background:var(--card)}
.card.flag{border:2px solid var(--warn);background:var(--warnbg)}
label{display:block;font-weight:600;margin:.8rem 0 .25rem}
input:focus-visible,select:focus-visible,textarea:focus-visible{outline-offset:0;border-color:var(--focus)}
input[type=text],input[type=email],input[type=password],input[type=number],input[type=date],select,textarea{width:100%;max-width:640px;font:inherit;padding:.55rem .6rem;border:2px solid var(--line);border-radius:6px;background:var(--card);color:var(--ink);min-height:44px}
textarea{min-height:6rem}
.hint{color:var(--muted);font-size:.95rem;margin:.2rem 0}
button,.btn{font:inherit;font-weight:600;border-radius:6px;border:2px solid var(--brand);background:var(--brand);color:#fff;padding:.55rem 1rem;min-height:44px;cursor:pointer;text-decoration:none;display:inline-block}
button.secondary,.btn.secondary{background:var(--card);color:var(--link);border-color:var(--link)}
button.danger{background:var(--card);color:var(--err);border-color:var(--err)}
button:disabled{opacity:.6;cursor:not-allowed}
.row{display:flex;flex-wrap:wrap;gap:.5rem;align-items:center}
.msg{padding:.7rem 1rem .7rem 2.6rem;border-radius:var(--r);margin:.8rem 0;border:2px solid;position:relative}
.msg::before{position:absolute;left:.9rem;top:.7rem;font-weight:700}
.msg.err::before{content:"!"}.msg.ok::before{content:"\2713"}.msg.warn::before{content:"!"}
.msg.err{border-color:var(--err);color:var(--err);background:var(--errbg)}
.msg.ok{border-color:var(--ok);color:var(--ok);background:var(--okbg)}
.msg.warn{border-color:var(--warn);color:var(--warn);background:var(--warnbg)}
.badge{display:inline-block;padding:.1rem .55rem;border-radius:999px;border:1.5px solid currentColor;font-size:.9rem;font-weight:600;margin-right:.35rem}
.badge.draft{color:var(--warn)}.badge.approved{color:var(--ok)}.badge.archived{color:var(--muted)}.badge.bad{color:var(--err)}.badge.info{color:var(--link)}
table{border-collapse:collapse;width:100%;margin:.6rem 0}
th,td{border:1px solid var(--line);padding:.45rem .6rem;text-align:left;vertical-align:top}
th{background:var(--soft)}
.tablewrap{overflow-x:auto}
[role=tablist]{display:flex;flex-wrap:wrap;gap:.25rem;border-bottom:3px solid var(--brand);margin-top:.5rem}
[role=tab]{background:var(--card);color:var(--link);border-color:var(--link);border-width:2px;border-style:solid;border-bottom:0;border-radius:6px 6px 0 0}
[role=tab][aria-selected=true]{background:var(--brand);border-color:var(--brand);color:#fff}
.opt{display:block;border:2px solid var(--line);border-radius:8px;padding:.7rem .8rem;margin:.4rem 0;cursor:pointer;font-weight:400}
.opt input{margin-right:.6rem;transform:scale(1.3)}
.opt.right{border-color:var(--ok);background:var(--okbg)}.opt.wrong{border-color:var(--err);background:var(--errbg)}
.tiles{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:.6rem}
.tile{border:1px solid var(--line);border-radius:8px;padding:.7rem;background:var(--soft)}
.tile b{display:block;font-size:1.6rem}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.src{font-size:.95rem}
.copybox{font-family:ui-monospace,Consolas,monospace;word-break:break-all;background:var(--soft);border:1px solid var(--line);padding:.6rem;border-radius:6px}
@media (prefers-reduced-motion:no-preference){.card{transition:box-shadow .15s,transform .15s}.card.lift:hover{box-shadow:0 4px 14px rgba(0,0,0,.12);transform:translateY(-2px)}}
.ring{width:56px;height:56px;flex:none}.ring circle{fill:none;stroke-width:6}.ring .t{stroke:var(--soft)}.ring .v{stroke:var(--ok);stroke-linecap:round;transform:rotate(-90deg);transform-origin:50% 50%}.ring text{font-size:13px;font-weight:700;fill:var(--ink)}
@media (prefers-reduced-motion:no-preference){button,.btn{transition:background .15s,transform .1s}button:active:not(:disabled){transform:translateY(1px)}}
/* shared pieces for the learner screens (step 4) */
.pbar{height:10px;background:var(--soft);border:1px solid var(--line);border-radius:999px;overflow:hidden}
.pbar>i{display:block;height:100%;background:var(--ok)}
.chip{display:inline-block;font-size:.85rem;font-weight:600;padding:.1rem .6rem;border-radius:999px;background:var(--soft);color:var(--ink);border:1px solid var(--line)}
.chip.streak{border-color:var(--accent)}
@media (max-width:600px){main{padding:.75rem}h1{font-size:1.4rem}}
@media (forced-colors:active){.badge,.tile,.card{border:1px solid CanvasText}}

.askcard h2{margin-top:0}.askbar{display:flex;gap:.5rem;margin:.6rem 0}.askbar input{padding:.7rem .8rem;font-size:1.05rem}.chips{display:flex;flex-wrap:wrap;gap:.5rem;margin:.4rem 0}
.chipbtn{background:var(--card);color:var(--link);border:1px solid var(--line);border-radius:999px;padding:.4rem .8rem;font-size:.92rem;cursor:pointer;text-align:left}.chipbtn:hover{border-color:var(--brand)}
.micbtn{min-width:44px;padding:.4rem;display:inline-flex;align-items:center;justify-content:center}.micbtn.on{background:var(--err);border-color:var(--err);color:#fff}.micmsg{font-size:.85rem}.micmsg:empty{display:none}
.vbar{display:inline-flex;align-items:center;gap:.75rem;flex-wrap:wrap}.vrate{display:inline-flex;align-items:center;gap:.4rem;font-size:.9rem}.vrate input{width:7.5rem;min-height:0}
.qrow{display:flex;align-items:center;justify-content:space-between;gap:.75rem;flex-wrap:wrap}.qrow button{min-height:40px;padding:.35rem 1rem}
.ans p{margin:.5rem 0}.fb{margin-top:.6rem;font-size:.9rem}.fb button{margin-right:.3rem}
.powered{display:inline-flex;align-items:center;gap:.5rem}.powered img{height:68px;width:auto;vertical-align:middle;background:#fff;border-radius:4px;padding:2px 4px}
.sitefoot{display:flex;flex-wrap:wrap;align-items:center;gap:.25rem .5rem;max-width:72rem;margin:2rem auto 1rem;padding:0 1rem;font-size:.85rem;color:var(--muted)}

.errsum h2{font-size:1.15rem;margin:0 0 .3rem}
.errlist{margin:.2rem 0 0;padding-left:1.2rem}
.errlist a{color:inherit;font-weight:700}
.fielderr{color:var(--err);font-weight:700;margin:.2rem 0}
input[aria-invalid=true],select[aria-invalid=true],textarea[aria-invalid=true]{border-color:var(--err);border-width:3px}
.errsum:focus{outline:3px solid var(--focus);outline-offset:2px}

.cards{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:.8rem}
.cards>li{margin:0}
.tcard h3{margin:.4rem 0 .2rem}
.trow{display:flex;justify-content:space-between;align-items:center;gap:.8rem;flex-wrap:wrap}
.big{font-size:1.25rem;font-weight:700;margin:0}
.opt:has(input:checked){border-color:var(--link);background:var(--soft)}
.opt.right:has(input),.opt.right{border-color:var(--ok);background:var(--okbg)}.opt.wrong:has(input),.opt.wrong{border-color:var(--err);background:var(--errbg)}
.pbar{margin-bottom:.8rem}

@media (prefers-reduced-motion:no-preference){.msg.ok{animation:pop .25s ease-out}.msg.ok::before{animation:pop .35s ease-out}.ring .v{transition:stroke-dashoffset .6s ease-out}}
@keyframes pop{from{transform:scale(.96);opacity:.5}to{transform:scale(1);opacity:1}}
h1[tabindex="-1"]:focus{outline:none}

button[aria-disabled=true]{opacity:.6;cursor:not-allowed}

dialog.leave{max-width:30rem;width:calc(100% - 2rem);border:2px solid var(--line);border-radius:var(--r);padding:1.2rem;background:var(--card);color:var(--ink)}
dialog.leave::backdrop{background:rgba(0,0,0,.5)}
dialog.leave h2{margin-top:0}

.thumb{width:72px;height:54px;object-fit:cover;border-radius:6px;border:1px solid var(--line);flex:none}
.picrow{display:flex;flex-wrap:wrap;align-items:center;gap:.6rem;margin:.5rem 0}
.picfield{border:1px solid var(--line);border-radius:var(--r);padding:.6rem .8rem;margin:.8rem 0}
.picfield legend{font-weight:600;padding:0 .3rem}
dialog.picker{width:min(60rem,calc(100% - 2rem));max-height:90vh;overflow:auto;border:2px solid var(--line);border-radius:var(--r);padding:1.2rem;background:var(--card);color:var(--ink)}
dialog.picker::backdrop,dialog.zoom::backdrop{background:rgba(0,0,0,.55)}
.pgrid{display:grid;grid-template-columns:repeat(auto-fill,minmax(160px,1fr));gap:.7rem;margin:.8rem 0}
.pcell{display:flex;flex-direction:column;align-items:flex-start;gap:.3rem;text-align:left;background:var(--card);color:var(--ink);border:2px solid var(--line);font-weight:400;padding:.4rem}
.pcell:hover{border-color:var(--link)}
.pcell img{width:100%;height:100px;object-fit:cover;border-radius:4px}
.pcell span{font-size:.9rem}
.withpic{display:grid;gap:1rem}
@media (min-width:760px){.withpic{grid-template-columns:minmax(0,1fr) minmax(220px,38%);align-items:start}}
@media (max-width:759px){.withpic figure{order:-1}}
figure.ref{margin:0}
figure.ref .refbtn{padding:0;border:2px solid var(--line);background:var(--card);border-radius:var(--r);min-height:0;display:block;width:100%;cursor:zoom-in;overflow:hidden}
figure.ref img{display:block;width:100%;height:auto}
figure.ref figcaption{font-size:.8rem;color:var(--muted);margin-top:.25rem}
dialog.zoom{max-width:min(70rem,96vw);border:2px solid var(--line);border-radius:var(--r);padding:1rem;background:var(--card);color:var(--ink)}
dialog.zoom img{display:block;max-width:100%;max-height:75vh;margin:0 auto .8rem}
.cardpic{display:block;width:100%;height:110px;object-fit:cover;border-radius:6px;margin-bottom:.5rem}

/* guide characters (from the pilot) */
.mas{display:inline-block;flex:none}.mas svg{display:block;width:100%;height:100%;overflow:visible}
.coach{display:flex;align-items:center;gap:14px;margin:0 0 .8rem}
.bubble{position:relative;background:var(--soft);border:1px solid var(--line);border-radius:14px;padding:.5rem .9rem;flex:0 1 auto;max-width:34rem;color:var(--ink)}
.bubble:before{content:"";position:absolute;left:-8px;top:50%;margin-top:-7px;border:7px solid transparent;border-right-color:var(--line);border-left:0}
.confetti{position:fixed;inset:0;pointer-events:none;overflow:hidden;z-index:50}
.confetti i{position:absolute;top:-12px;width:9px;height:14px;border-radius:2px;opacity:0}
@media (prefers-reduced-motion:no-preference){
.mas .bobber{animation:bob 3.2s ease-in-out infinite;transform-box:fill-box;transform-origin:center bottom}
.mas .eyes{transform-box:fill-box;transform-origin:center;animation:blink 4.5s infinite}
.mas .cap{transform-box:view-box;transform-origin:20px 28px}
.mas.right .cap{animation:captip 1.2s ease-in-out 1}
.mas.right .bobber,.mas.cheer .bobber{animation:cheer .7s ease-in-out 3,bob 3.2s ease-in-out 2.1s infinite}
.mas.wrong .bobber{animation:tilt 1.1s ease-in-out 1}
.mas.hello .bobber{animation:hello 1.8s ease-in-out 1,bob 3.2s ease-in-out 1.8s infinite}
.bubble{animation:slidein .4s ease-out}
.confetti i{animation:fall 1.9s ease-in forwards}
}
@keyframes bob{0%,100%{transform:translateY(0) rotate(0)}50%{transform:translateY(-2.5px) rotate(-1.5deg)}}
@keyframes blink{0%,94%,100%{transform:scaleY(1)}96%{transform:scaleY(.1)}}
@keyframes captip{0%{transform:rotate(0)}30%{transform:rotate(-24deg) translateY(-3px)}70%{transform:rotate(-24deg) translateY(-3px)}100%{transform:rotate(0)}}
@keyframes cheer{0%,100%{transform:translateY(0)}50%{transform:translateY(-10px)}}
@keyframes tilt{0%,100%{transform:rotate(0)}30%,70%{transform:rotate(-9deg)}}
@keyframes hello{0%{transform:translateY(14px) scale(.6);opacity:0}45%{transform:translateY(-6px) scale(1.06);opacity:1}70%{transform:translateY(0) scale(1)}100%{transform:none;opacity:1}}
@keyframes slidein{from{transform:translateY(8px)}to{transform:none}}
@keyframes fall{0%{opacity:1;transform:translate(0,0) rotate(0)}100%{opacity:0;transform:translate(var(--dx),105vh) rotate(var(--rot))}}
/* home page */
.hero{display:flex;gap:1.2rem;align-items:center;padding:1.4rem}.hero h1{margin:.1rem 0}.hero p{margin:.3rem 0}.herologo{height:64px;width:auto;max-width:160px;object-fit:contain}
.tagline{font-size:1.1rem}.who{font-size:1.05rem}.small{font-size:.85rem}
.tgroup{margin:1.6rem 0}.tgroup h2{margin-bottom:.2rem}
.blocks{list-style:none;padding:0;margin:.8rem 0 0;display:grid;gap:1rem;grid-template-columns:repeat(auto-fill,minmax(250px,1fr))}
.block{display:flex;flex-direction:column;align-items:center;text-align:center;gap:.7rem;height:100%;padding:1.2rem 1rem;border:2px solid var(--line);border-radius:12px;background:var(--card);color:var(--ink);text-decoration:none}
.block:hover{border-color:var(--brand)}.block:focus-visible{outline:3px solid var(--focus);outline-offset:2px}
.tart{display:flex;justify-content:center}.tart svg,.tart .mas{width:88px;height:88px}
.ttitle{display:block;font-size:1.2rem;font-weight:700;color:var(--link)}.tdesc{display:block;color:var(--muted);margin-top:.25rem}
@media (prefers-reduced-motion:no-preference){.block{transition:box-shadow .15s,transform .15s}.block:hover{box-shadow:0 6px 16px rgba(0,0,0,.14);transform:translateY(-3px)}.block:hover .mas .bobber{animation:cheer .6s ease-in-out 2}}
@media (max-width:520px){.hero{flex-direction:column;text-align:center}.blocks{grid-template-columns:1fr}}

.askcols{display:grid;grid-template-columns:minmax(0,1fr) 22rem;gap:1.25rem;align-items:start}.askcols.nolib{grid-template-columns:minmax(0,1fr)}
.libpanel{border:1px solid var(--line,#ccc);border-radius:10px;padding:.9rem 1rem;background:var(--card,#fff);max-height:80vh;overflow:auto}.libpanel h2{margin:.1rem 0 .2rem;font-size:1.1rem}
.libstat{margin:.1rem 0 .6rem}.libtoggle,.linkbtn{background:none;border:0;color:var(--link,#005ea2);text-decoration:underline;cursor:pointer;padding:.25rem 0;font:inherit;min-height:32px}
.libfind{display:flex;gap:.4rem;align-items:center;margin:.4rem 0}.libfind input{flex:1;min-width:0;padding:.5rem .6rem;box-sizing:border-box}
.libpanel .node{display:block;width:100%;text-align:left;background:none;border:0;border-radius:6px;padding:.4rem .5rem;font:inherit;color:inherit;cursor:pointer;text-decoration:none;min-height:36px}
.libpanel .node:hover{background:rgba(0,0,0,.05)}.libpanel .node.sel{background:rgba(0,94,162,.14);font-weight:600}.libpanel .node small{display:block;opacity:.75;font-weight:400}
.libpanel button.node small{display:inline;margin-left:.3rem}.libpanel .kids{margin:0 0 .4rem 1rem;border-left:2px solid rgba(0,0,0,.1);padding-left:.4rem}.libpanel .doc{font-size:.92rem;cursor:default}.libpanel a.doc{cursor:pointer;color:var(--link,#005ea2)}
.scopenote{margin:.2rem 0;min-height:1.2em}
@media (max-width:820px){.askcols{grid-template-columns:minmax(0,1fr)}.libpanel{max-height:none}}