/* LearnMed · cromo oscuro (estilo-ung). El color solo informa: acierto, error, selección, racha, XP. */
:root {
  --night: #05080c; --night-2: #0b0f14; --white: #fff; --snow: #f5f5f5; --smoke: #dadadb;
  --ash: #aaa9ad; --graphite: #5b5b5b; --glass: rgba(255,255,255,.03); --hair: rgba(255,255,255,.1);
  --ok: #46d38a; --bad: #ff6b6b; --sel: #5ab4ff; --warm: #ffa94d; --xp: #ffd43b;
  --sans: "Geist", system-ui, -apple-system, "Segoe UI", sans-serif;
  --script: "Great Vibes", cursive;
  --mono: "Geist Mono", ui-monospace, Menlo, monospace;
  --ease: cubic-bezier(.22,1,.36,1);
  --snap: cubic-bezier(0,0,.58,1);
  --skin: #E2B775; --line: #4a3358;
}
* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }
html, body { margin: 0; height: 100%; background: var(--night); color: var(--white); font: 500 16px/1.45 var(--sans); }
body { overflow: hidden; }
button { font: inherit; color: inherit; cursor: pointer; border: 0; background: none; padding: 0; }
button:focus-visible { outline: 2px solid var(--sel); outline-offset: 3px; }
img { -webkit-user-drag: none; user-select: none; }

#app { position: relative; height: 100dvh; max-width: 480px; margin: 0 auto; background: var(--night); overflow: hidden; }
@media (min-width: 520px) { #app { border-inline: 1px solid var(--hair); } }
.screen { position: absolute; inset: 0; display: flex; flex-direction: column; overflow: hidden;
  padding: env(safe-area-inset-top) 0 0; }

/* tipografía */
.script { font-family: var(--script); font-weight: 400; letter-spacing: 0; font-size: 1.3em; }
h1, h2 { margin: 0; font-weight: 500; letter-spacing: -.04em; line-height: .95; }
h1 { font-size: clamp(44px, 13vw, 60px); background: linear-gradient(180deg, #fff 30%, #aaa9ad); -webkit-background-clip: text; background-clip: text; color: transparent; }
h2 { font-size: clamp(28px, 8vw, 36px); }
.label { font: 500 13px/1 var(--sans); color: var(--ash); letter-spacing: .01em; }
.mono { font-family: var(--mono); font-weight: 400; }
p { margin: 0; color: var(--ash); }

/* botones */
.btn { display: inline-flex; align-items: center; justify-content: space-between; gap: 14px; min-height: 52px;
  padding: 6px 6px 6px 24px; border-radius: 999px; background: var(--white); color: var(--night); font-size: 15px;
  transition: transform .3s var(--ease), opacity .2s; width: 100%; }
.btn .dot { width: 40px; height: 40px; border-radius: 50%; background: var(--night); color: var(--white);
  display: grid; place-items: center; transition: transform .3s var(--ease); font-size: 16px; }
.btn:hover .dot { transform: rotate(-45deg) scale(1.08); }
.btn:active { transform: scale(.98); }
.btn[disabled] { background: var(--glass); color: var(--graphite); border: 1px solid var(--hair); cursor: default; }
.btn[disabled] .dot { background: transparent; color: var(--graphite); }
.btn-2 { display: inline-flex; align-items: center; justify-content: center; min-height: 48px; padding: 0 22px; border-radius: 999px;
  border: 1px solid var(--hair); color: var(--white); font-size: 15px; width: 100%; }
.btn-2:hover { background: var(--glass); }
.icon-btn { width: 40px; height: 40px; border-radius: 50%; display: grid; place-items: center; color: var(--ash); }
.icon-btn:hover { color: var(--white); background: var(--glass); }

/* inicio */
.home { padding-inline: 24px; padding-bottom: calc(24px + env(safe-area-inset-bottom)); gap: 18px; }
.bar { display: flex; align-items: center; justify-content: space-between; min-height: 56px; }
.stats { display: flex; gap: 14px; font: 400 13px/1 var(--mono); }
.stats b { font-weight: 500; }
.stats .s { color: var(--warm); } .stats .x { color: var(--xp); }
.mascot { flex: 1; min-height: 0; display: grid; place-items: center; --w: min(46vw, 30dvh, 230px); }
.home h1 .script { -webkit-text-fill-color: var(--white); color: var(--white); }
.card { background: var(--glass); border: 1px solid var(--hair); border-radius: 20px; padding: 18px; display: grid; gap: 8px; }
.card .row { display: flex; align-items: baseline; gap: 12px; }
.card .num { font-family: var(--script); font-size: 34px; line-height: 1; }
.card h2 { font-size: 26px; }
.card .meta { font: 400 12px/1 var(--mono); color: var(--ash); }
.foot { display: flex; justify-content: space-between; align-items: center; color: var(--graphite); font: 400 12px/1 var(--mono); }

/* mascota (animación aceptada) */
.wrap { width: var(--w, min(80vw, 45vh, 538px)); aspect-ratio: 538/985; position: relative; }
.stage { position: relative; width: 538px; height: 985px; transform-origin: 0 0; }
.rig { position: absolute; inset: 0; transform-origin: 50% 100%; will-change: transform; }
.rig img { position: absolute; left: 0; top: 0; display: block; user-select: none; -webkit-user-drag: none; }
.head { position: absolute; left: 0; top: 0; width: 538px; height: 420px; transform-origin: 270px 380px; will-change: transform; }
.lid { position: absolute; background: var(--skin); border-bottom: 5px solid var(--line); border-radius: 50%; transform-origin: 50% 0; transform: scaleY(0); }

/* lección */
.top { display: flex; align-items: center; gap: 10px; padding: 12px 16px 8px; }
.prog { flex: 1; height: 12px; border-radius: 999px; background: var(--hair); overflow: hidden; }
.prog i { display: block; height: 100%; width: 100%; background: var(--ok); border-radius: 999px; transform-origin: 0 50%; transform: scaleX(0); transition: transform .3s var(--snap); }
.hearts { display: flex; align-items: center; gap: 5px; color: var(--bad); font: 500 15px/1 var(--mono); min-width: 44px; justify-content: flex-end; }
.hearts svg { width: 20px; height: 20px; fill: currentColor; }
.hearts.hit svg { animation: hit .4s var(--ease); }
@keyframes hit { 30% { transform: scale(1.35); } 100% { transform: scale(1); } }
.body { flex: 1; position: relative; overflow: hidden; }
.ex { position: absolute; inset: 0; overflow-y: auto; padding: 18px 20px 24px; display: flex; flex-direction: column; gap: 18px; }
.ex .q { display: flex; align-items: flex-start; gap: 10px; }
.ex .q h2 { font-size: clamp(24px, 6.6vw, 30px); line-height: 1.05; }
.say { flex: none; width: 40px; height: 40px; border-radius: 50%; border: 1px solid var(--hair); display: grid; place-items: center; color: var(--sel); }
.say svg { width: 20px; height: 20px; fill: currentColor; }
.say.big { width: 96px; height: 96px; margin: 8px auto; }
.say.big svg { width: 44px; height: 44px; }
.listen { display: grid; justify-items: center; gap: 8px; }
.opts { display: grid; gap: 10px; }
.opt { display: flex; align-items: center; gap: 14px; min-height: 56px; padding: 10px 16px; text-align: left;
  background: var(--glass); border: 1px solid var(--hair); border-bottom-width: 3px; border-radius: 16px;
  transition: background .2s, border-color .2s, transform .2s var(--ease); }
.opt:hover { background: rgba(255,255,255,.06); }
.opt .k { font: 400 12px/1 var(--mono); color: var(--ash); border: 1px solid var(--hair); border-radius: 8px; min-width: 24px; height: 24px; display: grid; place-items: center; }
.opt.sel { border-color: var(--sel); background: rgba(90,180,255,.1); }
.opt.sel .k { color: var(--sel); border-color: var(--sel); }
.opt.ok { border-color: var(--ok); background: rgba(70,211,138,.12); }
.opt.bad { border-color: var(--bad); background: rgba(255,107,107,.12); }
.opt.ok .k { color: var(--ok); border-color: var(--ok); } .opt.bad .k { color: var(--bad); border-color: var(--bad); }
.locked .opt { pointer-events: none; }

.sentence { font-size: clamp(22px, 6vw, 28px); letter-spacing: -.02em; line-height: 1.5; }
.slot { display: inline-block; min-width: 7ch; margin: 0 4px; padding: 0 8px; text-align: center; border-bottom: 2px solid var(--hair); color: var(--sel); transition: border-color .2s; }
.slot.ok { color: var(--ok); border-color: var(--ok); } .slot.bad { color: var(--bad); border-color: var(--bad); }
.line, .bank { display: flex; flex-wrap: wrap; gap: 8px; align-content: flex-start; }
.line { min-height: 112px; padding: 14px 0 0; background: repeating-linear-gradient(transparent 0 55px, var(--hair) 55px 56px); }
.line.ok .chip { border-color: var(--ok); color: var(--ok); } .line.bad .chip { border-color: var(--bad); color: var(--bad); }
.chip { min-height: 44px; padding: 0 16px; border-radius: 14px; background: var(--night-2); border: 1px solid var(--hair); border-bottom-width: 3px; font-size: 17px; transition: transform .2s var(--ease), opacity .2s; }
.chip:active { transform: scale(.96); }
.chip.ghost { opacity: .18; pointer-events: none; }
.locked .chip { pointer-events: none; }

/* pie: comprobar y retroalimentación */
.dock { padding: 12px 20px calc(16px + env(safe-area-inset-bottom)); border-top: 1px solid var(--hair); }
.fb { margin: -12px -20px calc(-16px - env(safe-area-inset-bottom)); padding: 16px 20px calc(16px + env(safe-area-inset-bottom)); display: grid; gap: 12px; border-radius: 20px 20px 0 0; }
.fb.ok { background: #0c2a1d; color: var(--ok); } .fb.bad { background: #2c1316; color: var(--bad); }
.fb .head-r { display: flex; gap: 12px; align-items: center; }
.fb img { width: 64px; height: 64px; object-fit: contain; flex: none; }
.fb h3 { margin: 0; font-size: 22px; font-weight: 500; letter-spacing: -.03em; }
.fb p { color: inherit; opacity: .9; font-size: 15px; }
.fb .btn { background: var(--white); }

/* resultado y sin corazones */
.end { padding: 24px; gap: 20px; align-items: center; justify-content: center; text-align: center; }
.end .pose { width: min(60vw, 32dvh, 240px); height: min(60vw, 32dvh, 240px); object-fit: contain; }
.end .grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; width: 100%; }
.end .grid div { background: var(--glass); border: 1px solid var(--hair); border-radius: 16px; padding: 12px 6px; display: grid; gap: 6px; }
.end .grid b { font: 500 22px/1 var(--mono); } .end .grid span { font-size: 12px; color: var(--ash); }
.end .grid .x b { color: var(--xp); } .end .grid .a b { color: var(--ok); } .end .grid .s b { color: var(--warm); }
.end .acts { display: grid; gap: 10px; width: 100%; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition-duration: 0s !important; }
}