/* ===========================================================
   Mi Cubo Magico — estilos
   =========================================================== */
:root {
  --bg: #1b1033;
  --bg2: #2d1b52;
  --card: #ffffff;
  --ink: #24123f;
  --muted: #7a6a92;
  --accent: #ffd93d;
  --ok: #4caf50;
  --warn: #ff8c42;
  --radius: 22px;
  --shadow: 0 10px 30px rgba(0, 0, 0, .28);
}

* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }

html, body {
  margin: 0; padding: 0; height: 100%;
  background: radial-gradient(circle at 50% 0%, var(--bg2), var(--bg) 70%);
  color: #fff;
  font-family: 'Baloo 2', 'Segoe UI Rounded', 'Trebuchet MS', system-ui, sans-serif;
  overscroll-behavior: none;
  user-select: none;
}

#app {
  max-width: 560px; margin: 0 auto; min-height: 100%;
  display: flex; flex-direction: column; padding: 14px 16px 22px;
}

.screen { display: none; flex: 1; flex-direction: column; }
.screen.active { display: flex; }

h1 { font-size: 2.1rem; margin: .2em 0 .1em; text-align: center; letter-spacing: -.5px; }
h2 { font-size: 1.35rem; margin: .2em 0; }
p.lead { text-align: center; color: #cbbde0; margin: 0 0 18px; font-size: 1.02rem; }

/* ---------- botones ---------- */
.btn {
  display: flex; align-items: center; gap: 12px; justify-content: center;
  width: 100%; border: none; cursor: pointer;
  font: inherit; font-weight: 700; font-size: 1.18rem;
  padding: 18px 20px; border-radius: var(--radius);
  background: var(--card); color: var(--ink);
  box-shadow: var(--shadow); margin-bottom: 14px;
  transition: transform .12s ease, filter .12s ease;
}
.btn:active { transform: scale(.97); filter: brightness(.95); }
.btn.primary { background: linear-gradient(135deg, #ffd93d, #ffb03a); }
.btn.blue { background: linear-gradient(135deg, #62b6ff, #4d96ff); color: #06224a; }
.btn.ghost {
  background: rgba(255, 255, 255, .1); color: #fff; box-shadow: none;
  border: 2px solid rgba(255, 255, 255, .22); font-size: 1rem; padding: 13px;
}
.btn .emoji { font-size: 1.6rem; }
.btn small { display: block; font-weight: 500; font-size: .82rem; color: var(--muted); }

.row { display: flex; gap: 10px; }
.row .btn { margin-bottom: 10px; }

/* ---------- cabecera ---------- */
.topbar {
  display: flex; align-items: center; gap: 10px; margin-bottom: 8px; min-height: 44px;
}
.topbar .title { flex: 1; font-weight: 700; font-size: 1.1rem; }
.icon-btn {
  width: 44px; height: 44px; border-radius: 14px; border: none; cursor: pointer;
  background: rgba(255, 255, 255, .12); color: #fff; font-size: 1.25rem;
  display: grid; place-items: center;
}
.icon-btn.on { background: var(--accent); color: #3a2a00; }

.chip {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 7px 13px; border-radius: 99px; font-size: .82rem; font-weight: 700;
  background: rgba(255, 255, 255, .12); border: none; color: #fff; cursor: pointer;
}
.chip.ok { background: rgba(76, 175, 80, .3); }
.chip.warn { background: rgba(255, 140, 66, .32); }

/* ---------- escena 3D ---------- */
.scene {
  perspective: 1100px; display: grid; place-items: center;
  height: 300px; margin: 4px 0 10px; touch-action: none; cursor: grab;
}
.cube3d {
  position: relative; width: 0; height: 0;
  transform-style: preserve-3d; transition: transform .55s ease;
}
.cubie { position: absolute; transform-style: preserve-3d; }
.cubie-face {
  position: absolute; inset: 0; background: #241733;
  border-radius: 9px; border: 1px solid rgba(0, 0, 0, .45);
  box-shadow: inset 0 0 12px rgba(0, 0, 0, .35);
}
.cubie-face.painted { box-shadow: inset 0 -6px 12px rgba(0, 0, 0, .22); }
.cubie-face.hi {
  outline: 4px solid #fff; outline-offset: -5px;
  animation: pulse .9s ease-in-out infinite alternate;
}
@keyframes pulse { to { outline-color: rgba(255, 255, 255, .25); } }

/* ---------- panel de instruccion ---------- */
.instr {
  background: var(--card); color: var(--ink); border-radius: var(--radius);
  padding: 16px; box-shadow: var(--shadow); text-align: center;
}
.instr .phase {
  font-size: .95rem; color: var(--muted); font-weight: 700;
  display: flex; align-items: center; justify-content: center; gap: 7px; margin-bottom: 6px;
}
.move-card { display: flex; align-items: center; justify-content: center; gap: 16px; }
.face-chip {
  width: 76px; height: 76px; border-radius: 20px; flex: none;
  border: 4px solid rgba(0, 0, 0, .18); box-shadow: inset 0 -8px 14px rgba(0, 0, 0, .16);
}
.arrow { width: 66px; height: 66px; flex: none; }
.move-text { font-size: 1.3rem; font-weight: 800; line-height: 1.2; text-align: left; }
.move-text small { display: block; font-size: .82rem; font-weight: 600; color: var(--muted); }
.instr .kidtip { margin: 10px 0 0; font-size: .95rem; color: #55436e; }

/* formula en curso */
.formula { display: flex; gap: 6px; justify-content: center; flex-wrap: wrap; margin-top: 12px; }
.formula span {
  min-width: 34px; padding: 5px 8px; border-radius: 10px; font-weight: 800;
  background: #efe9f7; color: #6b5b85; font-size: .95rem;
}
.formula span.now { background: var(--ink); color: #fff; transform: scale(1.12); }
.formula span.done { opacity: .35; }

/* ---------- progreso ---------- */
.progress { height: 12px; border-radius: 99px; background: rgba(255, 255, 255, .14); overflow: hidden; margin: 12px 0 6px; }
.progress i { display: block; height: 100%; background: linear-gradient(90deg, #6bcB77, #ffd93d); transition: width .35s ease; }
.steps { display: flex; gap: 5px; justify-content: center; flex-wrap: wrap; margin-bottom: 6px; }
.steps b {
  width: 30px; height: 30px; border-radius: 50%; display: grid; place-items: center;
  background: rgba(255, 255, 255, .12); font-size: .9rem;
}
.steps b.done { background: var(--ok); }
.steps b.now { background: var(--accent); color: #3a2a00; transform: scale(1.15); }

/* ---------- teclado en pantalla ---------- */
.pad { display: grid; grid-template-columns: repeat(6, 1fr); gap: 8px; margin-top: 12px; }
.pad button {
  border: none; border-radius: 14px; padding: 10px 0 8px; cursor: pointer;
  font: inherit; font-weight: 800; font-size: .9rem; color: #1c1030;
  display: flex; flex-direction: column; align-items: center; gap: 3px;
}
.pad button span { font-size: 1.1rem; }
.pad button:active { transform: scale(.94); }

/* ---------- tarjetas de nivel ---------- */
.levels { display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; }
.levels button {
  aspect-ratio: 1; border-radius: 18px; border: none; cursor: pointer;
  background: var(--card); color: var(--ink); font: inherit; font-weight: 800; font-size: 1.4rem;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  box-shadow: var(--shadow);
}
.levels button .stars { font-size: .7rem; letter-spacing: 1px; }
.levels button[disabled] { opacity: .35; cursor: default; }

/* ---------- calibracion ---------- */
.swatches { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin: 16px 0; }
.swatches button {
  border: none; border-radius: 18px; padding: 22px 6px; cursor: pointer;
  font: inherit; font-weight: 800; font-size: .95rem; color: #1c1030;
  box-shadow: var(--shadow);
}
.calface { font-size: 3.4rem; text-align: center; margin: 6px 0; }

/* ---------- varios ---------- */
.note { font-size: .86rem; color: #bfb0d6; text-align: center; line-height: 1.45; }
.note code { background: rgba(255, 255, 255, .12); padding: 1px 6px; border-radius: 6px; }
.spacer { flex: 1; }
.hidden { display: none !important; }

.toast {
  position: fixed; left: 50%; bottom: 26px; transform: translateX(-50%);
  background: #fff; color: var(--ink); padding: 13px 22px; border-radius: 99px;
  font-weight: 700; box-shadow: var(--shadow); z-index: 50; animation: pop .3s ease;
}
@keyframes pop { from { transform: translate(-50%, 16px); opacity: 0; } }

.confetti { position: fixed; inset: 0; pointer-events: none; overflow: hidden; z-index: 60; }
.confetti i {
  position: absolute; top: -14px; width: 11px; height: 16px; border-radius: 2px;
  animation: fall linear forwards;
}
@keyframes fall {
  to { transform: translateY(105vh) rotate(720deg); opacity: .85; }
}

.big-emoji { font-size: 4.5rem; text-align: center; margin: 10px 0; }

@media (max-height: 700px) {
  .scene { height: 240px; }
  h1 { font-size: 1.7rem; }
}

.move-card { position: relative; }
.move-x2 {
  position: absolute; left: 96px; top: 50%; transform: translateY(-46%);
  font-size: 1.5rem; font-weight: 900; color: #24123f;
  background: #fff; border-radius: 8px; padding: 0 3px; pointer-events: none;
}

/* ---------- cronometro ---------- */
.scramble {
  background: rgba(255, 255, 255, .1); border-radius: 16px; padding: 12px 14px;
  font-size: 1.02rem; font-weight: 700; text-align: center; line-height: 1.65;
  letter-spacing: .4px; word-spacing: 4px;
}
.timer-big {
  font-size: 4rem; font-weight: 800; text-align: center; margin: 12px 0 2px;
  font-variant-numeric: tabular-nums; letter-spacing: -2px;
}
.timer-big.listo { color: #6bcB77; }
.timer-big.esperando { color: var(--warn); }

.statgrid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; margin: 12px 0; }
.statgrid div {
  background: rgba(255, 255, 255, .09); border-radius: 14px; padding: 9px 6px; text-align: center;
}
.statgrid b { display: block; font-size: 1.02rem; font-variant-numeric: tabular-nums; }
.statgrid span { font-size: .68rem; color: #bfb0d6; text-transform: uppercase; letter-spacing: .5px; }

.historial { max-height: 180px; overflow-y: auto; }
.historial div {
  display: flex; align-items: center; gap: 8px; padding: 7px 10px; border-radius: 10px;
  font-size: .9rem; background: rgba(255, 255, 255, .05); margin-bottom: 4px; cursor: pointer;
}
.historial div b { width: 28px; color: var(--muted); font-size: .76rem; }
.historial div span { flex: 1; font-variant-numeric: tabular-nums; font-weight: 700; }
.historial div em { font-style: normal; font-size: .7rem; color: #bfb0d6; }
.historial div.sel { background: rgba(255, 217, 61, .22); }

/* ---------- pestanas ---------- */
.tabs { display: flex; gap: 6px; margin-bottom: 12px; }
.tabs button {
  flex: 1; border: none; cursor: pointer; font: inherit; font-weight: 700; font-size: .9rem;
  padding: 10px 4px; border-radius: 12px; background: rgba(255, 255, 255, .1); color: #fff;
}
.tabs button.on { background: var(--accent); color: #3a2a00; }

/* ---------- lista de casos ---------- */
.casos { display: grid; grid-template-columns: repeat(2, 1fr); gap: 8px; }
.casos button {
  display: flex; align-items: center; gap: 10px; border: none; cursor: pointer;
  font: inherit; text-align: left; padding: 9px; border-radius: 14px;
  background: rgba(255, 255, 255, .09); color: #fff;
}
.casos button:active { transform: scale(.97); }
.casos b { display: block; font-size: .92rem; }
.casos em { font-style: normal; font-size: .7rem; color: #bfb0d6; }

/* ---------- lecciones ---------- */
.leccion {
  display: flex; align-items: center; gap: 12px; width: 100%; border: none; cursor: pointer;
  font: inherit; text-align: left; padding: 12px 14px; border-radius: 16px; margin-bottom: 8px;
  background: var(--card); color: var(--ink); box-shadow: var(--shadow);
}
.leccion:active { transform: scale(.985); }
.leccion .n {
  width: 38px; height: 38px; border-radius: 50%; flex: none; display: grid; place-items: center;
  background: #efe9f7; font-weight: 800; font-size: 1.15rem;
}
.leccion.hecha .n { background: var(--ok); }
.leccion .txt { flex: 1; }
.leccion b { display: block; font-size: 1rem; }
.leccion em { font-style: normal; font-size: .78rem; color: var(--muted); }
.leccion .barra { height: 5px; border-radius: 99px; background: #efe9f7; margin-top: 5px; }
.leccion .barra i { display: block; height: 100%; border-radius: 99px; background: var(--ok); }

#les-texto p { margin: .5em 0; font-size: .94rem; line-height: 1.5; color: #3c2b56; }
#les-truco { background: #fff7dc; border-radius: 12px; padding: 9px 11px; font-size: .87rem; }

/* ---------- gestor de algoritmos ---------- */
.algos-cab {
  display: flex; align-items: baseline; gap: 8px; margin: 14px 0 6px; font-size: .95rem;
}
.algos-cab span { font-size: .76rem; color: #bfb0d6; }
.algos { display: flex; flex-direction: column; gap: 6px; margin-bottom: 10px; }
.algos .fila {
  display: flex; align-items: center; gap: 8px; padding: 9px 10px; border-radius: 12px;
  background: rgba(255, 255, 255, .07); cursor: pointer;
}
.algos .fila.sel { background: rgba(255, 217, 61, .2); outline: 2px solid var(--accent); }
.algos .fila .tick { width: 20px; flex: none; text-align: center; }
.algos .fila code {
  flex: 1; font-size: .82rem; letter-spacing: .3px; word-spacing: 2px; font-family: inherit;
  font-weight: 700;
}
.algos .fila .etq { font-size: .66rem; color: #bfb0d6; flex: none; }
.algos .fila .del {
  border: none; background: none; color: #ff9a9a; cursor: pointer; font-size: .95rem; flex: none;
}
.tabs button em { font-style: normal; display: block; font-size: .62rem; opacity: .75; }

.grupo-cab {
  grid-column: 1 / -1; font-size: .78rem; font-weight: 800; color: var(--accent);
  text-transform: uppercase; letter-spacing: .6px; margin: 10px 0 2px;
}
.casos button.hecho { outline: 1px solid rgba(107, 203, 119, .5); }
.grabando { animation: latido 1s ease-in-out infinite; }
@keyframes latido { 50% { opacity: .45; } }

/* ---------- cronometro: inspeccion ---------- */
.timer-big.inspeccion { color: var(--accent); }
.timer-big.aviso { color: var(--warn); }
.timer-big.penal { color: #ff7b7b; }
#tm-scene { pointer-events: none; }
.tm-marca {
  display: flex; gap: 6px; justify-content: center; margin: -4px 0 6px;
}
.tm-marca i {
  width: 8px; height: 8px; border-radius: 50%; background: rgba(255, 255, 255, .18);
}
.tm-marca i.on { background: var(--accent); }

/* la guía en vivo, mientras sigues una fórmula */
#fr-move:not(:empty) { margin: 10px 0 2px; }
.formula span.hecho { opacity: .3; text-decoration: line-through; }
.instr .siguiendo {
  display: inline-block; font-size: .7rem; font-weight: 800; letter-spacing: .5px;
  background: var(--ok); color: #fff; border-radius: 99px; padding: 2px 9px; margin-bottom: 4px;
}

/* ---------- cronometro: guia de la mezcla ---------- */
#tm-move:not(:empty) {
  margin: 4px 0 8px; background: var(--card); color: var(--ink);
  border-radius: 18px; padding: 10px 14px; box-shadow: var(--shadow);
}
.scramble span.hecho { opacity: .28; text-decoration: line-through; }
.scramble span.now {
  background: #fff; color: #1c1030 !important; border-radius: 7px;
  padding: 1px 5px; font-weight: 800;
}
.scramble.error { outline: 2px solid #ff7b7b; }

/* ---------- pie de pagina ---------- */
#pie {
  display: flex; align-items: center; justify-content: center; gap: 8px;
  flex-wrap: wrap; padding: 14px 8px 4px; margin-top: auto;
  font-size: .76rem; color: #9b8bb5;
}
#pie a {
  display: inline-flex; align-items: center; gap: 5px;
  color: inherit; text-decoration: none; padding: 4px 6px; border-radius: 8px;
}
#pie a:hover { color: #fff; background: rgba(255, 255, 255, .08); }
#pie a b { color: var(--accent); font-weight: 700; }
/* El gato de GitHub tiene los huecos (orejas, patas) muy finos: a 14px y
   en morado apagado se rellenaban al suavizar y quedaba un punto redondo.
   16px es su tamaño nativo (viewBox 0 0 16 16, un pixel por unidad) y con
   el color aclarado la silueta se distingue. */
#pie svg { width: 16px; height: 16px; flex: none; color: #c9bce0; }
#pie a:hover svg { color: #fff; }
#pie .sep { opacity: .4; }

/* ---------- miniatura del cubo desplegado ---------- */
.net { display: grid; gap: 1px; }
.net i { border-radius: 1px; }

/* ---------- patrones ---------- */
.patrones { display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px; }
.patrones button {
  display: flex; flex-direction: column; align-items: center; gap: 6px;
  border: none; cursor: pointer; font: inherit; padding: 12px 8px;
  border-radius: 16px; background: rgba(255, 255, 255, .09); color: #fff;
}
.patrones button:active { transform: scale(.97); }
.patrones .net { margin: 2px auto; }
.patrones b { font-size: .92rem; }
.patrones em { font-style: normal; font-size: .68rem; color: #bfb0d6; letter-spacing: 1px; }
.patrones button.hecho { outline: 1px solid rgba(107, 203, 119, .55); }

.objetivo {
  display: flex; align-items: center; gap: 12px; justify-content: center;
  background: rgba(255, 255, 255, .07); border-radius: 14px; padding: 8px 12px; margin-top: 10px;
}
.objetivo span { font-size: .78rem; color: #bfb0d6; text-align: left; }