:root{
  --bg:#111; --panel:#1e1e1e; --fg:#fff; --accent:#ffd400; --accent-fg:#000;
  --btn:#2e2e2e; --border:#555;
  --touch:64px;
}
*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html,body{margin:0;height:100%;background:var(--bg);color:var(--fg);
  font-family:-apple-system,"Helvetica Neue",Arial,sans-serif;font-size:22px;
  overscroll-behavior:none;touch-action:none;-webkit-user-select:none;user-select:none}
.hidden{display:none!important}
.screen{position:fixed;inset:0;display:flex;flex-direction:column;
  padding-top:env(safe-area-inset-top);padding-bottom:env(safe-area-inset-bottom)}

/* idioma */
.lang-switch{position:absolute;top:calc(12px + env(safe-area-inset-top));right:14px;display:flex;gap:6px;z-index:5}
.lang-btn{min-height:52px;min-width:64px;padding:0 14px;font-size:22px;font-weight:700;
  background:var(--btn);color:var(--fg);border:3px solid var(--border);border-radius:14px;cursor:pointer}
.lang-btn.active{background:var(--accent);color:var(--accent-fg);border-color:var(--accent)}

/* inicio */
#screen-home{align-items:center;justify-content:center;padding:24px;text-align:center;overflow:auto}
#screen-home h1{font-size:48px;margin:0 0 12px}
.lead{max-width:640px;font-size:24px;line-height:1.4;margin:0 0 32px}
.big-actions{display:flex;flex-direction:column;gap:18px;width:min(520px,100%)}
.bigbtn{display:flex;align-items:center;justify-content:center;min-height:88px;font-size:30px;font-weight:700;
  background:var(--btn);color:var(--fg);border:4px solid var(--border);border-radius:20px;cursor:pointer}
.bigbtn.primary{background:var(--accent);color:var(--accent-fg);border-color:var(--accent)}
.samples{display:flex;gap:12px;align-items:center;flex-wrap:wrap;justify-content:center;margin-top:24px;font-weight:700}
.samples a{display:inline-flex;align-items:center;text-decoration:none}
.saved-list{display:flex;gap:14px;flex-wrap:wrap;justify-content:center;margin-top:28px}
.saved-list .thumb{width:150px;background:var(--panel);border:3px solid var(--border);border-radius:14px;overflow:hidden}
.saved-list .thumb img{width:100%;height:150px;object-fit:cover;background:#fff;display:block}
.saved-list .thumb .row{display:flex}
.saved-list .thumb button{flex:1;min-height:52px;font-size:22px;background:var(--btn);color:var(--fg);border:0}

/* barra */
.bar{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:10px 14px;background:var(--panel);
  border-bottom:3px solid var(--border);flex:none}
.bar .title{font-weight:700;font-size:26px}
.btn{min-height:var(--touch);min-width:var(--touch);padding:0 20px;font-size:26px;font-weight:700;
  background:var(--btn);color:var(--fg);border:3px solid var(--border);border-radius:16px;cursor:pointer}
.btn.primary{background:var(--accent);color:var(--accent-fg);border-color:var(--accent)}
.btn.small{min-height:52px;font-size:20px;align-self:flex-start}
.btn.round{border-radius:50%;padding:0;width:72px;height:72px;font-size:36px}
.row{display:flex;gap:10px}

/* ajuste */
.adjust-body{flex:1;display:flex;min-height:0}
.preview-wrap{flex:1;display:flex;align-items:center;justify-content:center;background:#000;overflow:hidden}
#preview{max-width:100%;max-height:100%;background:#fff}
.controls{width:340px;flex:none;padding:18px;overflow:auto;background:var(--panel);display:flex;flex-direction:column;gap:22px}
.controls label{display:flex;flex-direction:column;gap:8px;font-weight:700}
.controls output{float:right;color:var(--accent)}
.controls input[type=range]{width:100%;height:44px}
.controls .check{flex-direction:row;align-items:center;gap:14px}
.controls input[type=checkbox]{width:36px;height:36px}
@media (max-width:820px){.adjust-body{flex-direction:column}.controls{width:100%;max-height:45%}}

/* pintar */
#viewport{flex:1;position:relative;overflow:hidden;background:#333;touch-action:none}
#stage{position:absolute;left:0;top:0;transform-origin:0 0;box-shadow:0 0 30px #000}
#stage canvas{position:absolute;left:0;top:0;display:block}
#c-lines{pointer-events:none}
.zoom-ctl{position:absolute;right:14px;top:14px;display:flex;flex-direction:column;gap:12px}

.toolbar{flex:none;background:var(--panel);border-top:3px solid var(--border);padding:8px 14px 10px;
  display:flex;flex-direction:column;gap:10px}
.tool-row{display:flex;align-items:center;gap:16px;flex-wrap:wrap}
.tools{display:flex;gap:10px}
.tool{width:72px;height:72px;font-size:38px;background:var(--btn);border:4px solid var(--border);border-radius:18px;cursor:pointer}
.tool.active{border-color:var(--accent);background:#444;box-shadow:0 0 0 4px var(--accent) inset}
.size-ctl{display:flex;align-items:center;gap:10px;font-weight:700}
.size-ctl input{width:160px;height:44px}
/* paleta: una sola fila horizontal deslizable, encima de las herramientas */
.palette{display:flex;gap:10px;flex-wrap:nowrap;overflow-x:auto;padding:6px 2px;
  -webkit-overflow-scrolling:touch;scrollbar-width:none}
.palette::-webkit-scrollbar{display:none}
.swatch{flex:none;width:56px;height:56px;border-radius:50%;border:4px solid #fff;cursor:pointer;outline:0}
.swatch.active{border-color:var(--accent);box-shadow:0 0 0 4px var(--accent)}

.toast{position:fixed;left:50%;bottom:120px;transform:translateX(-50%);background:var(--accent);color:#000;
  padding:16px 28px;border-radius:16px;font-size:24px;font-weight:700;z-index:99}

/* cuadernos */
.section-title{font-size:30px;margin:36px 0 14px}
.notebook-list{display:flex;gap:16px;flex-wrap:wrap;justify-content:center;width:min(900px,100%)}
.notebook{width:200px;min-height:150px;border-radius:20px;border:4px solid var(--border);background:var(--panel);
  color:var(--fg);font-size:24px;font-weight:700;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:8px;cursor:pointer;padding:14px}
.notebook .icon{font-size:48px}
.notebook .count{font-size:18px;font-weight:400;opacity:.8}
.notebook.new{border-style:dashed}
.nb-body{flex:1;overflow:auto;padding:20px;display:flex;flex-direction:column;align-items:center}
.row-actions{flex-direction:row;flex-wrap:wrap;width:min(900px,100%)}
.row-actions .bigbtn{flex:1;min-width:280px;font-size:24px}
.saved-list .thumb .name{font-size:18px;padding:6px 8px;text-align:center;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.overlay{position:fixed;inset:0;background:rgba(0,0,0,.75);display:flex;align-items:center;justify-content:center;z-index:50;padding:20px}
.sheet{background:var(--panel);border:4px solid var(--border);border-radius:24px;padding:24px;width:min(560px,100%);display:flex;flex-direction:column;gap:18px}
.sheet h2{margin:0;font-size:28px}
.picker-list{display:flex;flex-direction:column;gap:10px;max-height:40vh;overflow:auto}
.picker-list .btn{justify-content:flex-start;text-align:left;display:flex;align-items:center;gap:12px}

/* pantallas angostas (teléfono o tablet en vertical): el lienzo nunca se aplasta */
#viewport{min-height:45vh}
.bar .btn{white-space:nowrap}
@media (max-width:760px){
  html,body{font-size:18px}
  .bar{padding:8px 10px}
  .bar .title{font-size:20px}
  .btn{min-height:56px;min-width:56px;padding:0 12px;font-size:20px}
  .toolbar{gap:8px;padding:6px 10px 8px}
  .tool-row{flex-direction:column;align-items:stretch;gap:8px}
  .tool-row > *{min-width:0;width:100%}
  .tools{justify-content:space-between}
  .tool{width:60px;height:60px;font-size:30px}
  .size-ctl{justify-content:center}
  .size-ctl input{flex:1;max-width:260px}
  .palette{gap:8px}
  .swatch{width:52px;height:52px;border-width:3px}
  .zoom-ctl{right:8px;top:8px;gap:8px}
  .btn.round{width:56px;height:56px;font-size:28px}
}
@media (max-width:480px){
  .bar .title{display:none}
  #paint-back{font-size:18px}
  .lang-btn{min-height:44px;min-width:52px;font-size:18px}
}

/* caligrafía */
.cal-sets{display:flex;gap:8px}
.cal-set.active{background:var(--accent);color:var(--accent-fg);border-color:var(--accent)}
.cal-chips{flex:none;display:flex;gap:8px;overflow-x:auto;padding:10px 14px;background:var(--panel);
  border-bottom:3px solid var(--border);-webkit-overflow-scrolling:touch;scrollbar-width:none}
.cal-chips::-webkit-scrollbar{display:none}
.cal-chip{flex:none;width:60px;height:72px;padding:6px;background:var(--btn);color:var(--fg);
  border:3px solid var(--border);border-radius:14px;cursor:pointer}
.cal-chip svg{width:100%;height:100%;display:block}
.cal-chip.active{background:var(--accent);color:var(--accent-fg);border-color:var(--accent)}
.cal-main{flex:1;min-height:0;display:flex;gap:14px;padding:14px}
.cal-col{flex:1;min-width:0;display:flex;flex-direction:column;gap:8px}
.cal-label{position:absolute;left:10px;top:8px;font-weight:700;font-size:22px;color:#333;pointer-events:none}
.cal-panel{flex:1;min-height:0;position:relative;background:#fff;border:4px solid var(--border);border-radius:20px;overflow:hidden}
.cal-panel > svg,.cal-panel canvas{position:absolute;inset:0;width:100%;height:100%;display:block}
.cal-panel svg{pointer-events:none}
#cal-model{cursor:pointer}
#cal-practice{border-color:var(--accent)}
.cal-pens{display:flex;align-items:center;gap:10px;padding:0 8px;border-left:3px solid var(--border);border-right:3px solid var(--border)}
.cal-pen{width:64px;height:64px;border-radius:50%;border:4px solid #fff;color:#fff;font-size:28px;font-weight:700;
  cursor:pointer;box-shadow:none;font-family:Arial,sans-serif}
.cal-pen.active{box-shadow:0 0 0 5px var(--accent)}
.cal-actions{flex:none;display:flex;justify-content:center;flex-wrap:wrap;gap:10px;padding:10px 14px;
  background:var(--panel);border-top:3px solid var(--border)}
@media (max-width:760px){
  .cal-main{gap:8px;padding:8px}
  .cal-label{font-size:16px;left:6px;top:4px}
  .cal-chip{width:52px;height:64px}
  .cal-actions{gap:6px;padding:8px}
  .cal-pen{width:48px;height:48px;font-size:22px}
  .cal-pens{gap:6px;padding:0 4px}
}

/* juegos */
.games-body{flex:1;overflow:auto;display:flex;flex-wrap:wrap;gap:24px;align-items:center;justify-content:center;padding:24px}
.game-pick{width:min(340px,100%);min-height:260px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:10px;
  background:var(--btn);color:var(--fg);border:4px solid var(--border);border-radius:28px;cursor:pointer;font-size:24px}
.game-pick .icon{font-size:96px;line-height:1}
.game-pick b{font-size:40px}
.mem-mode.active,.cnt-range.active,.catch-range.active{background:var(--accent);color:var(--accent-fg);border-color:var(--accent)}

.mem-grid{flex:1;min-height:0;display:grid;gap:12px;padding:12px;justify-content:center;align-content:center}
.mem-card{padding:0;border:0;background:none;cursor:pointer;perspective:800px}
.mem-inner{position:relative;width:100%;height:100%;transition:transform .35s;transform-style:preserve-3d}
.mem-card.open .mem-inner,.mem-card.matched .mem-inner{transform:rotateY(180deg)}
.mem-back,.mem-front{position:absolute;inset:0;border-radius:18px;display:flex;align-items:center;justify-content:center;
  -webkit-backface-visibility:hidden;backface-visibility:hidden}
.mem-back{background:var(--accent);color:var(--accent-fg);font-size:64px;font-weight:700;border:5px solid #fff}
.mem-front{background:#fff;border:5px solid var(--accent);transform:rotateY(180deg)}
.mem-front svg{width:100%;height:100%;display:block}
.mem-card.matched .mem-front{border:8px solid #2e7d32;box-shadow:0 0 0 4px #2e7d32}

.cnt-stars{display:flex;align-items:center;font-size:28px;font-weight:700;padding:0 8px;white-space:nowrap}
.cnt-q{flex:none;display:flex;align-items:center;justify-content:center;gap:14px;padding:12px 14px 0;font-size:34px;font-weight:700;text-align:center}
.cnt-field-wrap{flex:1;min-height:0;margin:12px 14px 0;background:#fff;border:4px solid var(--border);border-radius:24px;overflow:hidden}
#cnt-field{width:100%;height:100%;display:block}
.cnt-obj{cursor:pointer}
.cnt-ring{fill:transparent;stroke:transparent;stroke-width:6}
.cnt-obj.marked .cnt-ring{fill:#fff3b0;stroke:#f9a825}
.cnt-badge{display:none}
.cnt-obj.marked .cnt-badge{display:inline}
.cnt-badge circle{fill:#111}
.cnt-badge text{fill:#fff;font-weight:700;font-family:Arial,sans-serif}
.cnt-hint{flex:none;text-align:center;font-size:20px;opacity:.75;padding:6px}
.cnt-answers{flex:none;display:flex;justify-content:center;gap:20px;padding:6px 14px 16px}
.cnt-ans{width:120px;height:110px;font-size:64px;font-weight:700;background:var(--btn);color:var(--fg);
  border:5px solid var(--border);border-radius:24px;cursor:pointer}
.cnt-ans.right{background:#2e7d32;border-color:#a5d6a7}
.cnt-ans.wrong{opacity:.3}

.win{align-items:center;text-align:center}
.win-big{font-size:110px;line-height:1}
.win h2{font-size:44px}
.win-stars{font-size:56px}
.win .bigbtn{width:100%}
@media (max-width:760px){
  .game-pick{min-height:200px}
  .game-pick .icon{font-size:72px}
  .mem-grid{gap:8px;padding:8px}
  .mem-back{font-size:44px}
  .cnt-q{font-size:24px}
  .cnt-ans{width:90px;height:84px;font-size:48px}
  .cnt-stars{font-size:20px}
}
/* barra de juegos en pantallas angostas: se reparte en dos líneas en vez de salirse
   (memoria tiene más botones, así que baja antes) */
@media (max-width:560px){
  .game-bar{flex-wrap:wrap;justify-content:center;row-gap:8px}
  .game-bar > .btn:first-child{margin-right:auto}
  .game-bar > .row:first-of-type{order:3;width:100%;justify-content:center}
}

/* atrapa y cuenta */
#catch-canvas{width:100%;height:100%;display:block;touch-action:none}
@media (max-width:1000px){
  #screen-memory .game-bar{flex-wrap:wrap;justify-content:center;row-gap:8px}
  #screen-memory .game-bar > .btn:first-child{margin-right:auto}
  #screen-memory .game-bar > .row:first-of-type{order:3;width:100%;justify-content:center}
}

/* sight words: tarjetas */
.wd-units{display:flex;flex-wrap:wrap;gap:24px;justify-content:center;width:100%}
.wd-unit{gap:14px;padding:20px}
.wd-unit b{font-size:44px}
.wd-preview{font-size:22px;opacity:.8}
.wd-last{font-size:20px;font-weight:700;color:var(--accent)}
#wd-mix.active{background:var(--accent);color:var(--accent-fg);border-color:var(--accent)}
#wd-count{font-variant-numeric:tabular-nums}
.wd-play{flex:1;min-height:0;display:flex;flex-direction:column}
.wd-bar{flex:none;height:14px;margin:12px 14px 0;background:var(--btn);border-radius:7px;overflow:hidden}
#wd-bar-fill{height:100%;width:0;background:var(--accent);transition:width .35s}
.wd-stage{flex:1;min-height:0;display:flex;align-items:center;justify-content:center;padding:16px 14px;overflow:hidden}
.wd-card{width:min(100%,1100px);height:100%;max-height:640px;background:#fff;color:#111;border:6px solid var(--accent);border-radius:36px;
  display:flex;align-items:center;justify-content:center;box-shadow:0 10px 0 rgba(0,0,0,.35)}
#wd-word{font-family:Arial,"Helvetica Neue",sans-serif;font-weight:700;line-height:1;white-space:nowrap}
.wd-card.in{animation:wdIn .35s ease-out}
.wd-card.in-back{animation:wdInBack .35s ease-out}
.wd-card.out-ok{animation:wdOutOk .42s ease-in forwards;border-color:#2e7d32}
.wd-card.out-no{animation:wdOutNo .42s ease-in forwards;border-color:#c62828}
@keyframes wdIn{from{transform:translateY(40px) scale(.9);opacity:0}to{transform:none;opacity:1}}
@keyframes wdInBack{from{transform:translateX(-60px) scale(.9);opacity:0}to{transform:none;opacity:1}}
@keyframes wdOutOk{0%{transform:none;background:#fff}25%{background:#c8e6c9}100%{transform:translateX(120%) rotate(14deg);opacity:0;background:#c8e6c9}}
@keyframes wdOutNo{0%{transform:none;background:#fff}25%{background:#ffcdd2}100%{transform:translateX(-120%) rotate(-14deg);opacity:0;background:#ffcdd2}}
.wd-actions{flex:none;display:flex;align-items:center;justify-content:center;gap:18px;padding:0 14px 18px}
.wd-btn{flex:1;max-width:340px;min-height:110px;font-size:44px;font-weight:700;color:#fff;border:5px solid transparent;border-radius:28px;cursor:pointer}
.wd-btn:active{transform:scale(.96)}
.wd-btn.ok{background:#2e7d32;border-color:#a5d6a7}
.wd-btn.no{background:#c62828;border-color:#ef9a9a}
.wd-small{display:flex;flex-direction:column;gap:10px}
.wd-small .btn:disabled{opacity:.3}
.wd-result{position:relative;z-index:2;max-height:100%;overflow:auto}
.wd-score{font-size:34px;font-weight:700}
.wd-stars span{display:inline-block;animation:wdPop .5s both}
.wd-stars span.off{filter:grayscale(1);opacity:.25}
@keyframes wdPop{from{transform:scale(0) rotate(-90deg)}70%{transform:scale(1.35)}to{transform:none}}
.wd-res-icon.lvl3,.wd-res-icon.lvl2{animation:wdBounce 1s ease-in-out infinite}
.wd-res-icon.lvl1{animation:wdPop .6s both}
.wd-res-icon.lvl0{animation:wdFlex 1.2s ease-in-out infinite}
@keyframes wdBounce{0%,100%{transform:translateY(0) rotate(-6deg)}50%{transform:translateY(-22px) rotate(6deg)}}
@keyframes wdFlex{0%,100%{transform:scale(1)}50%{transform:scale(1.15)}}
.wd-missed-title{font-size:22px;opacity:.8;margin-bottom:8px}
.wd-missed{display:flex;flex-wrap:wrap;gap:10px;justify-content:center}
.wd-chip{min-height:56px;padding:0 18px;font-size:30px;font-weight:700;background:#fff;color:#111;border:3px solid #c62828;border-radius:14px;cursor:pointer;
  font-family:Arial,"Helvetica Neue",sans-serif}
.wd-res-row{display:flex;gap:12px;width:100%}
.wd-res-row .bigbtn{flex:1;font-size:24px;min-height:72px}
.wd-confetti{position:fixed;inset:0;pointer-events:none;overflow:hidden;z-index:1}
.wd-confetti i{position:absolute;top:-30px;border-radius:2px;animation:wdFall linear forwards}
@keyframes wdFall{to{transform:translate(var(--dx),110vh) rotate(var(--rot))}}
@media (max-width:760px){
  .wd-btn{min-height:84px;font-size:32px}
  .wd-unit b{font-size:34px}
  .wd-card{border-radius:24px}
}
@media (orientation:landscape) and (max-height:600px){
  .wd-btn{min-height:70px}
}