/* Look & feel from the prototype (legacy/stavitel-slov.html), plus parent-area components. */
:root{
  --bg:#BFE6FF; --grid:rgba(29,36,51,.06); --ink:#1D2433; --muted:#4B5568;
  --card:#FFFFFF; --edge:#1D2433; --good:#2F9E44; --bad:#E03131; --hint:#FFD43B;
  --read:"Andika", "Comic Sans MS", "Trebuchet MS", system-ui, sans-serif;
  --pixel:"Tiny5", "Courier New", monospace;
}
@media (prefers-color-scheme: dark){
  :root:not([data-theme="light"]){
    --bg:#14223A; --grid:rgba(255,255,255,.05); --ink:#F2F5FA; --muted:#AAB7CC;
    --card:#22324D; --edge:#070D18;
  }
}
:root[data-theme="dark"]{
  --bg:#14223A; --grid:rgba(255,255,255,.05); --ink:#F2F5FA; --muted:#AAB7CC;
  --card:#22324D; --edge:#070D18;
}
:root{box-sizing:border-box;padding-top:env(safe-area-inset-top,0px);padding-bottom:env(safe-area-inset-bottom,0px)}
html{scroll-padding-top:env(safe-area-inset-top,0px);background-color:var(--bg)}
*,*::before,*::after{box-sizing:inherit}
body{
  margin:0;min-height:100%;font-family:var(--read);color:var(--ink);background-color:var(--bg);
  background-image:linear-gradient(var(--grid) 2px,transparent 2px),linear-gradient(90deg,var(--grid) 2px,transparent 2px);
  background-size:32px 32px;font-size:18px;line-height:1.4;
  -webkit-tap-highlight-color:transparent;
}
#app{max-width:640px;margin:0 auto;padding:16px 16px 40px}
h1,h2,h3{font-family:var(--pixel);font-weight:400;margin:0;line-height:1.1}
h1{font-size:30px}
h2{font-size:22px}
h3{font-size:18px;margin-bottom:10px}
p{margin:0}
.muted{color:var(--muted)}
button{font:inherit;color:inherit;cursor:pointer}
button:focus-visible,textarea:focus-visible,input:focus-visible,select:focus-visible{outline:4px solid var(--hint);outline-offset:3px}

/* chunky block buttons */
.blk{
  background:var(--card);border:3px solid var(--edge);border-radius:12px;
  box-shadow:0 5px 0 var(--edge);transition:transform .08s,box-shadow .08s;
}
.blk:active:not(:disabled):not(.static){transform:translateY(4px);box-shadow:0 1px 0 var(--edge)}
.blk:disabled{cursor:default}

.top{display:flex;align-items:center;gap:12px;margin-bottom:18px}
.back{width:48px;height:48px;font-size:22px;flex:none}
.top .grow,.hello .grow{flex:1;min-width:0}

/* tower */
.towerCard{padding:18px;margin:18px 0 22px;display:flex;gap:18px;align-items:flex-end}
.tower{display:flex;flex-wrap:wrap-reverse;width:calc(10 * 16px);min-height:32px;flex:none;border-bottom:4px solid var(--edge);padding-bottom:2px}
.tb{width:16px;height:16px;box-shadow:inset -3px -3px 0 rgba(0,0,0,.25),inset 3px 3px 0 rgba(255,255,255,.35)}
.tb.new{animation:drop .5s ease-out}
@keyframes drop{from{transform:translateY(-60px);opacity:0}to{transform:none;opacity:1}}
.count{font-family:var(--pixel);font-size:40px;line-height:1}

.hello{display:flex;align-items:center;gap:14px}
.avatar{font-size:52px;line-height:1}
.bigavatar{font-size:88px;line-height:1;margin-bottom:10px}
.sync{margin:-8px 0 14px}

/* worlds */
.worlds{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
.world{padding:14px 12px 12px;text-align:left;display:flex;flex-direction:column;gap:4px;color:#1D2433;border-color:var(--edge)}
.world .ic{font-size:44px;line-height:1}
.world .nm{font-weight:700;font-size:19px;overflow-wrap:anywhere}
.world .st{font-size:14px;opacity:.85}

.modes{display:grid;gap:12px;margin-top:18px}
.mode{display:flex;align-items:center;gap:14px;padding:14px 16px;text-align:left}
.mode .ic{font-size:34px}
.mode .tx{flex:1}
.mode b{display:block;font-size:20px}
.stars{font-size:18px;letter-spacing:2px;white-space:nowrap}

/* game */
.prog{display:flex;gap:6px;margin-top:6px}
.prog i{flex:1;height:10px;border:2px solid var(--edge);border-radius:3px;background:var(--card)}
.prog i.on{background:var(--wc)}
.prompt{min-height:170px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px;margin:10px 0 18px;text-align:center}
.word{font-size:clamp(44px,13vw,68px);font-weight:700;letter-spacing:.02em;line-height:1.1;overflow-wrap:anywhere}
.say{width:96px;height:96px;font-size:44px;border-radius:50%}
.say.sm{width:56px;height:56px;font-size:26px}
.pic{font-size:96px;line-height:1}
.pic.txt{font-size:40px;font-weight:700}
.opts{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.opt{min-height:120px;font-size:64px;display:flex;align-items:center;justify-content:center;padding:8px}
.opt.txt{font-size:26px;font-weight:700;overflow-wrap:anywhere}
.opt.good{background:var(--good);color:#fff}
.opt.bad{background:var(--bad);opacity:.55}
.shake{animation:shake .35s}
@keyframes shake{20%,60%{transform:translateX(-7px)}40%,80%{transform:translateX(7px)}}

.slots{display:flex;flex-wrap:wrap;justify-content:center;gap:6px}
.slot{width:44px;height:56px;border-bottom:4px solid var(--ink);font-size:38px;font-weight:700;display:flex;align-items:flex-end;justify-content:center}
.slot.gap{border:none;width:18px}
.slot.done{color:var(--good)}
.tiles{display:flex;flex-wrap:wrap;justify-content:center;gap:10px;margin-top:8px}
.tile{width:62px;height:66px;font-size:36px;font-weight:700}
.tile.used{visibility:hidden}
.tile.hint{background:var(--hint);color:#1D2433}

.plus{position:fixed;left:50%;top:40%;transform:translate(-50%,-50%);font-family:var(--pixel);font-size:34px;pointer-events:none;animation:plus .9s ease-out forwards;color:var(--ink)}
@keyframes plus{from{opacity:1;transform:translate(-50%,-50%) scale(.8)}to{opacity:0;transform:translate(-50%,-140%) scale(1.15)}}

.result{text-align:center;padding:28px 18px;margin-top:20px}
.bigstars{font-size:56px;letter-spacing:6px;margin:12px 0}
.row{display:flex;gap:12px;justify-content:center;flex-wrap:wrap;margin-top:22px}
.row.left{justify-content:flex-start;margin-top:16px}
.btn{padding:14px 20px;font-weight:700;font-size:18px}
.btn.small{padding:8px 12px;font-size:15px}
.btn.wide{display:block;width:100%;margin-top:22px}
.btn.pri{background:var(--wc,#FFD43B);color:#1D2433}
.btn.danger{background:var(--bad);color:#fff}
.btn.busy{opacity:.6}

.cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(140px,1fr));gap:12px}
.card{padding:14px 8px;display:flex;flex-direction:column;align-items:center;gap:6px}
.card .pic{font-size:52px}
.card .pic.txt{font-size:22px}
.card .w{font-size:24px;font-weight:700;overflow-wrap:normal;word-break:keep-all;hyphens:none;text-align:center;max-width:100%}

.link{background:none;border:none;text-decoration:underline;color:var(--muted);padding:12px;margin:22px auto 0;display:block;font-size:16px}
.link.small{margin:8px 0 0;padding:8px 0;font-size:15px}
.link.danger,.danger.link{color:var(--bad)}
.inline-link{background:none;border:none;padding:0;text-decoration:underline;color:inherit;font-size:inherit}
.warn{background:var(--hint);color:#1D2433;padding:10px 14px;border-radius:10px;border:3px solid var(--edge);margin-bottom:14px;font-size:15px}
.note{font-size:15px;margin-top:8px}

/* parent area */
.panel{padding:18px;margin-top:6px}
.sect{margin-top:26px}
.sect:first-of-type{margin-top:6px}
.form label{display:block;font-weight:700;margin:14px 0 6px}
.form input:not([type=radio]):not([type=checkbox]),.form textarea,.form select{
  width:100%;font:inherit;color:var(--ink);background:var(--bg);border:3px solid var(--edge);border-radius:10px;padding:10px;
}
.form textarea{min-height:220px;font-size:17px}
.form label.check,.choice label{display:flex;align-items:center;gap:10px;font-weight:400;margin:14px 0 0}
.choice{display:flex;gap:22px;flex-wrap:wrap}
.choice label{margin:0}
.form input[type=radio],.form input[type=checkbox]{width:22px;height:22px;accent-color:var(--good)}
.codein{font-family:var(--pixel);font-size:26px;letter-spacing:3px;text-transform:uppercase;max-width:260px}
.tabs{display:flex;gap:10px;margin-bottom:12px}
.tab{flex:1;padding:10px;font-weight:700}
.tab.on{background:var(--hint);color:#1D2433}

.list{display:grid;gap:10px;margin-bottom:12px}
.item{display:flex;align-items:center;gap:12px;padding:10px 14px;text-align:left;width:100%}
.item.static{box-shadow:0 3px 0 var(--edge)}
.item .ic{font-size:32px;line-height:1}
.item .tx{flex:1;min-width:0;display:flex;flex-direction:column}
.item .tx .muted{font-size:15px}
.item .chev{font-size:26px;color:var(--muted)}

.avatars{display:grid;grid-template-columns:repeat(auto-fill,minmax(52px,1fr));gap:8px}
.av{font-size:30px;height:52px;padding:0;box-shadow:0 3px 0 var(--edge)}
.av.on{background:var(--hint)}

.qrbox{padding:16px;margin-top:16px;text-align:center}
.qr{background:#fff;display:inline-block;padding:6px;border-radius:8px;line-height:0}
.qr svg{width:min(260px,70vw);height:auto}
.paircode{font-family:var(--pixel);font-size:34px;letter-spacing:4px;margin-top:10px}
.cam{width:100%;max-height:320px;margin-top:14px;border:3px solid var(--edge);border-radius:12px;background:#000}

.tbl{width:100%;border-collapse:collapse;margin-top:12px;font-size:15px}
.tbl th,.tbl td{text-align:left;padding:6px 4px;border-bottom:2px solid var(--grid)}
.tbl th{color:var(--muted);font-weight:700}
.prose p+p{margin-top:12px}

.toast{position:fixed;left:50%;bottom:calc(24px + env(safe-area-inset-bottom,0px));transform:translateX(-50%);
  background:var(--ink);color:var(--bg);padding:12px 18px;border-radius:12px;font-size:16px;max-width:min(90vw,520px);
  box-shadow:0 4px 0 rgba(0,0,0,.25);z-index:10;animation:toast 3.2s ease forwards}
@keyframes toast{0%{opacity:0;transform:translate(-50%,10px)}8%,85%{opacity:1;transform:translate(-50%,0)}100%{opacity:0}}

[hidden]{display:none!important}

@media (prefers-reduced-motion: reduce){
  *{animation:none!important;transition:none!important}
}

/* stage 2: leaderboard + shared build */
.small{font-size:14px}
.boardBtn{margin:0 0 14px;background:var(--hint);color:#1D2433}
.buildCard{display:flex;gap:14px;align-items:center;padding:14px 16px;margin-bottom:22px}
.buildIc{font-size:56px;line-height:1}
.buildCard .grow{flex:1;min-width:0}
.bar{display:flex;gap:3px;margin:8px 0 6px}
.bar i{flex:1;height:14px;border:2px solid var(--edge);border-radius:2px;background:var(--card)}
.bar i.on{background:#FF9A3C;box-shadow:inset -2px -2px 0 rgba(0,0,0,.25),inset 2px 2px 0 rgba(255,255,255,.35)}
.board{list-style:none;margin:0 0 18px;padding:0;display:grid;gap:10px}
.row-item{display:flex;align-items:center;gap:12px;padding:10px 14px;box-shadow:0 3px 0 var(--edge)}
.row-item.me{background:var(--hint);color:#1D2433}
.row-item.me .muted{color:#1D2433}
.row-item .pos{width:34px;font-family:var(--pixel);font-size:22px;text-align:center}
.row-item .ic{font-size:30px;line-height:1}
.row-item .tx{flex:1;min-width:0;overflow-wrap:anywhere}
.row-item .pts{font-family:var(--pixel);font-size:20px;white-space:nowrap}
.challenge{display:flex;align-items:center;gap:12px;width:100%;padding:12px 14px;margin:0 0 12px;text-align:left;background:#FFE8A3;color:#1D2433}
.challenge.done{background:#B2F2BB}
.challenge .ic{font-size:34px;line-height:1}
.challenge .tx{flex:1;min-width:0;display:flex;flex-direction:column;gap:2px}
.challenge .muted{color:#4B5568}
.chmodes{display:flex;gap:12px;flex-wrap:wrap;font-size:15px;margin-top:2px}
.chmodes .ok{color:var(--good);font-weight:700}

/* stage 3: sentences */
.sentcards{display:grid;gap:10px}
.sentcard{display:flex;align-items:center;gap:14px;padding:12px 14px;text-align:left;width:100%}
.sentcard .pic{font-size:44px}
.sentcard .tx{display:flex;flex-direction:column;gap:2px;font-size:20px}
.sentcard .tx .muted{font-size:15px}
.sent{font-size:clamp(24px,7vw,34px);font-weight:700;line-height:1.35;text-align:center}
.gap{color:var(--muted);letter-spacing:2px}
.gap.done{color:var(--good);letter-spacing:normal}
.wslots{display:flex;flex-wrap:wrap;justify-content:center;align-items:flex-end;gap:8px 10px;font-size:26px;font-weight:700;max-width:100%}
.wslot{height:44px;border-bottom:4px solid var(--ink);display:inline-flex;align-items:flex-end;justify-content:center;padding:0 2px}
.wslot.done{color:var(--good)}
.wend{font-size:30px;align-self:flex-end}
.wtiles{display:flex;flex-wrap:wrap;justify-content:center;gap:10px;margin-top:8px}
.wtile{padding:12px 16px;font-size:24px;font-weight:700;min-height:58px}
.wtile.used{visibility:hidden}
.wtile.hint{background:var(--hint);color:#1D2433}

/* stage 3: stories */
.scene{padding:18px 16px;text-align:center;margin-bottom:6px}
.scenepic{font-size:88px;line-height:1.1;margin-bottom:10px}
.sent.story{font-size:clamp(24px,6.5vw,32px)}
.tw{background:none;border:none;padding:0 2px;font:inherit;font-weight:700;color:inherit;border-radius:6px;cursor:pointer}
.tw:active{background:var(--hint);color:#1D2433}
.scene .cs{margin-top:8px;font-size:17px}
.scene .row{margin-top:12px}
.storytext{white-space:pre-wrap;font-family:var(--read);font-size:16px;margin:12px 0 0}
.secttl{margin:22px 0 12px}

/* stage 3: badges */
.badgesBtn{margin:0 0 14px}
.badges{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:10px}
.badge{display:flex;flex-direction:column;align-items:center;text-align:center;gap:4px;padding:12px 8px;box-shadow:0 3px 0 var(--edge);opacity:.7}
.badge.on{opacity:1;background:#FFF3BF;color:#1D2433}
.badge.on .muted{color:#4B5568}
.badge .bic{font-size:38px;line-height:1}
.av.locked{display:flex;align-items:center;justify-content:center;opacity:.45;font-size:22px}

/* stage 3: lesson editor */
.erows{display:grid;gap:8px}
.erow{display:grid;grid-template-columns:minmax(0,1.4fr) 52px minmax(0,1fr) 32px;gap:6px;align-items:center}
.form .erow input{padding:8px;font-size:17px}
.epic{height:48px;font-size:26px;padding:0;box-shadow:0 3px 0 var(--edge)}
.edel{background:none;border:none;font-size:18px;color:var(--muted);padding:4px}
@media (max-width:480px){
  .erow{grid-template-columns:minmax(0,1fr) 52px 28px;grid-template-areas:"a p d" "c c c"}
  .erow .ea{grid-area:a}.erow .epic{grid-area:p}.erow .ecs{grid-area:c}.erow .edel{grid-area:d}
  .erow{padding-bottom:6px;border-bottom:2px dashed var(--grid)}
}
.picker{position:fixed;inset:0;background:rgba(0,0,0,.45);display:flex;align-items:center;justify-content:center;padding:16px;z-index:20}
.pickerIn{width:min(560px,100%);max-height:85vh;display:flex;flex-direction:column;padding:14px;gap:10px}
.pickerTop{display:flex;gap:8px}
.pickerTop input{flex:1;font:inherit;color:var(--ink);background:var(--bg);border:3px solid var(--edge);border-radius:10px;padding:10px;min-width:0}
.pgrid{display:grid;grid-template-columns:repeat(auto-fill,minmax(52px,1fr));gap:6px;overflow:auto}
.pe{font-size:32px;height:54px;background:var(--bg);border:2px solid transparent;border-radius:10px;cursor:pointer}
.pe:hover,.pe:focus-visible{border-color:var(--edge)}
.chip{display:inline-block;padding:2px 10px;margin:2px 0;border:2px solid var(--edge);border-radius:999px;background:var(--card);font-weight:700;font-size:15px}

/* stage 3: listen and repeat */
.repeatBtns .btn{min-width:130px}
.btn.recording{background:var(--bad);color:#fff;animation:pulse 1s infinite}
@keyframes pulse{50%{transform:scale(1.05)}}
.scenepic.txt{font-size:40px;font-weight:700}

/* stage 3: handwriting and tracing */
.padWrap{display:flex;flex-direction:column;align-items:center;gap:10px}
.padBox{position:relative;width:min(340px,100%)}
.pad{display:block;width:100%;background:var(--card);border:3px solid var(--edge);border-radius:12px;touch-action:none;cursor:crosshair}
.pad.lines{height:200px;
  /* writing lines like in a school notebook: ascender 12 %, x-height 40 %, baseline 80 % */
  background-image:linear-gradient(to bottom,transparent calc(12% - 1px),rgba(29,36,51,.18) 12%,transparent calc(12% + 1px),transparent calc(40% - 1px),rgba(29,36,51,.3) 40%,transparent calc(40% + 1px),transparent calc(80% - 2px),rgba(29,36,51,.55) 80%,transparent calc(80% + 2px))}
.padHint{position:absolute;inset:0;z-index:1;display:flex;align-items:center;justify-content:center;font-family:var(--read);font-weight:700;font-size:150px;color:rgba(47,158,68,.25);pointer-events:none;line-height:1;padding-bottom:14px}
.traceBox{position:relative;width:min(320px,80vw);aspect-ratio:1}
.traceBox .pad{position:absolute;inset:0;height:100%}
.traceBox #guide{background:var(--card)}
.traceBox #pad{background:transparent;border-color:transparent}
.center{text-align:center}
.letter{font-size:56px;font-weight:700;line-height:1}
.center-link{margin:0 auto}