/* Amazing Alphabet Adventure — shared styles
   Layout: one-screen app. Wide screens: square book page on the left, felt side panel on the right
   (Momo's home is at the bottom of the panel). Tall/narrow screens: page on top, panel below.
   One deliberate look (felt table + parchment); it does not switch with dark mode. */
:root{
  --felt:#2e4731; --felt-2:#3a5a3d; --felt-line:#557a55; --felt-text:#cfe0c4;
  --cream:#fbf1cf; --cream-2:#f3e2b0; --ink:#3a2a1a;
  --red:#c7372f; --red-dark:#8e241e; --gold:#f0b429; --leaf:#5fa33a;
  --f-kid:"Andika","Andika New Basic","Trebuchet MS",system-ui,sans-serif;
  --f-title:"Gentium Book Plus","Gentium Plus",Georgia,serif;
  color-scheme:light;
}
*{box-sizing:border-box}
html,body{height:100%;margin:0}
[hidden]{display:none!important}
body{background:var(--felt);color:var(--cream);font-family:var(--f-kid);overflow:hidden;
  -webkit-user-select:none;user-select:none;-webkit-tap-highlight-color:transparent;
  padding-top:env(safe-area-inset-top,0px);padding-bottom:env(safe-area-inset-bottom,0px)}
img{max-width:100%}

.app{position:relative;height:100%;display:flex;gap:16px;padding-block:12px;padding-inline:16px}

/* Book page + camera */
.viewport{position:relative;height:100%;aspect-ratio:1;max-width:calc(100% - 236px);flex:none;border-radius:10px;overflow:hidden;
  box-shadow:0 10px 30px rgba(0,0,0,.35);background:var(--cream);touch-action:manipulation}
.camera{position:absolute;inset:0;transform-origin:0 0;transition:transform .45s cubic-bezier(.4,.1,.2,1)}
.camera>img{width:100%;height:100%;display:block;max-width:none;pointer-events:none}
.zones{position:absolute;inset:0}
.zone{position:absolute;border:0;background:transparent;padding:0;cursor:pointer;border-radius:14px}
.zone:focus-visible{outline:3px solid var(--gold);outline-offset:2px}
.zoom-out{position:absolute;right:10px;top:10px;z-index:3;display:flex;align-items:center;gap:6px;
  font:inherit;font-weight:700;font-size:16px;border:0;border-radius:999px;padding:8px 14px 8px 10px;min-height:44px;
  background:var(--cream);color:var(--ink);box-shadow:0 3px 10px rgba(0,0,0,.3);cursor:pointer}
.zoom-out svg{width:22px;height:22px}

/* Side panel */
.panel{flex:1;min-width:0;display:flex;flex-direction:column;gap:12px;overflow-y:auto;overflow-x:hidden}
.panel-head{display:flex;align-items:center;gap:10px}
.home-btn{flex:none;width:44px;height:44px;border-radius:12px;border:2px solid var(--felt-line);background:transparent;color:var(--cream);cursor:pointer;display:grid;place-items:center}
.home-btn svg{width:22px;height:22px}
.brand{font-family:var(--f-title);font-size:clamp(16px,2.2vh,22px);line-height:1.15;color:var(--cream-2);text-wrap:balance;min-width:0}
.brand small{display:block;font-family:var(--f-kid);font-weight:400;font-size:.72em;color:var(--felt-text);letter-spacing:.04em}
.stars{display:flex;align-items:center;gap:10px;background:var(--felt-2);border-radius:14px;padding:8px 14px;
  font-weight:700;font-size:clamp(22px,4vh,34px);font-variant-numeric:tabular-nums}
.stars svg{width:1.2em;height:1.2em}
.tabs{display:flex;gap:6px;flex-wrap:wrap}
.tab{font:inherit;font-weight:700;font-size:17px;border:0;border-radius:12px;padding:8px 14px;min-height:44px;cursor:pointer;
  background:var(--felt-2);color:var(--cream)}
.tab[aria-selected="true"]{background:var(--gold);color:var(--ink)}
.game-panel{display:flex;flex-direction:column;gap:12px}
.levels{display:flex;flex-wrap:wrap;gap:6px}
.chip{font:inherit;font-weight:700;font-size:15px;border:2px solid var(--felt-line);background:transparent;color:var(--cream);
  border-radius:999px;padding:6px 12px;cursor:pointer;min-height:40px}
.chip[aria-pressed="true"]{background:var(--cream);color:var(--ink);border-color:var(--cream)}
.hint-line{font-size:14px;color:var(--felt-text);min-height:1.2em}
.words{display:flex;flex-wrap:wrap;gap:6px}
.word{font:inherit;font-size:19px;border:0;border-radius:10px;padding:4px 10px;background:rgba(251,241,207,.14);color:var(--cream);cursor:pointer;min-height:36px}
.word.found{background:var(--cream);color:var(--ink)}
.word.found::after{content:" \2605";color:var(--gold)}
.actions{display:flex;flex-wrap:wrap;gap:8px}
.btn{font:inherit;font-weight:700;font-size:17px;border:0;border-radius:14px;padding:10px 16px;cursor:pointer;min-height:48px;
  background:var(--red);color:#fff;box-shadow:0 3px 0 var(--red-dark)}
.btn.alt{background:var(--cream);color:var(--ink);box-shadow:0 3px 0 #b9a36a}
.btn:active{transform:translateY(2px);box-shadow:none}
.tab:focus-visible,.chip:focus-visible,.btn:focus-visible,.word:focus-visible,.home-btn:focus-visible,.zoom-out:focus-visible,.letter:focus-visible{outline:3px solid var(--gold);outline-offset:2px}
.momo-home{flex:1;min-height:150px}

/* Momo */
.momo{position:absolute;left:0;top:0;width:120px;z-index:5;pointer-events:none;
  transition:left .75s cubic-bezier(.45,.1,.3,1),top .75s cubic-bezier(.45,.1,.3,1),width .75s ease}
.momo img{display:block;width:100%;height:auto;max-width:none;transform-origin:50% 100%;filter:drop-shadow(0 6px 6px rgba(0,0,0,.28))}
.momo .inner{transform-origin:50% 100%}
.momo.flip .inner{transform:scaleX(-1)}
.momo.walking img{animation:hop .3s ease-in-out infinite alternate}
.momo.talking img{animation:bob .5s ease-in-out infinite alternate}
@keyframes hop{from{transform:translateY(0)}to{transform:translateY(-9%)}}
@keyframes bob{from{transform:rotate(-2.5deg) translateY(0)}to{transform:rotate(2.5deg) translateY(-2%)}}
.fx{position:absolute;inset:0;width:100%;height:100%;pointer-events:none;z-index:6;overflow:visible}

/* Word label + star bursts */
.tag{position:absolute;z-index:7;transform:translate(-50%,-100%) scale(.2);opacity:0;pointer-events:none;
  font-family:var(--f-kid);font-weight:700;color:var(--ink);background:var(--cream);border:3px solid var(--gold);
  border-radius:14px;padding:.05em .45em .12em;white-space:nowrap;box-shadow:0 6px 14px rgba(0,0,0,.3);
  transition:transform .28s cubic-bezier(.2,1.6,.4,1),opacity .2s}
.tag.show{transform:translate(-50%,-100%) scale(1);opacity:1}
.burst{position:absolute;z-index:8;pointer-events:none;width:0;height:0}
.burst i{position:absolute;left:-10px;top:-10px;width:20px;height:20px;animation:fly .8s ease-out forwards}
@keyframes fly{to{transform:translate(var(--dx),var(--dy)) scale(.4) rotate(160deg);opacity:0}}

/* Tracing board: sits over the page on big screens, fills the screen on phones */
.trace{position:absolute;z-index:4;background:var(--cream);display:flex;flex-direction:column;border-radius:10px;overflow:hidden}
.trace.full{border-radius:0}
.trace-bar{display:flex;align-items:center;justify-content:space-between;gap:8px;padding:10px 12px;flex-wrap:wrap}
.trace-title{font-family:var(--f-title);color:var(--ink);font-size:clamp(18px,3.2vmin,28px)}
.trace svg.board{flex:1;width:100%;min-height:0;touch-action:none}
.say{text-align:center;color:var(--ink);font-size:clamp(16px,3vmin,26px);font-weight:700;padding:4px 16px 12px;min-height:2.2em;pointer-events:none}

/* Start screen + letter picker */
.start{position:absolute;inset:0;z-index:20;background:rgba(30,46,32,.97);display:grid;place-items:center;text-align:center;padding-inline:16px;overflow-y:auto}
.start-inner{max-width:720px;padding-block:16px}
.start h1{font-family:var(--f-title);font-size:clamp(28px,6vmin,56px);color:var(--cream);margin:0 0 .2em;text-wrap:balance}
.start p{margin:0 0 1em;color:var(--felt-text);font-size:clamp(15px,2.4vmin,20px)}
.start img{height:min(30vh,240px);width:auto;margin:0 auto 8px;display:block}
.letter-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(56px,1fr));gap:8px}
.letter{font-family:var(--f-kid);font-weight:700;font-size:28px;aspect-ratio:1;border-radius:14px;border:0;cursor:pointer;
  background:var(--cream);color:var(--red);box-shadow:0 3px 0 #b9a36a}
.letter:disabled{background:rgba(251,241,207,.12);color:rgba(251,241,207,.35);box-shadow:none;cursor:default}
.version{position:absolute;right:10px;bottom:8px;font-size:12px;color:#9fb99a}

/* Tall / narrow screens */
@media (max-aspect-ratio:1/1){
  .app{flex-direction:column;overflow-y:auto}
  .viewport{height:auto;width:100%;max-width:100%}
  .panel{overflow:visible}
  .momo-home{min-height:170px}
}
@media (prefers-reduced-motion:reduce){
  .momo,.camera{transition-duration:.01s}
  .momo.walking img,.momo.talking img{animation:none}
  .tag{transition:none}
}