/* ============================================================
 * theme.css — TEMA de la guía de LENGUAJE ALGEBRAICO (capa LIBRE).
 * SOLO estilos del tema (prefijo la-): leyenda de color y widgets por toque
 * (traductor, anatomia, reducir, evaluador). NO redefine clases `guia-*`
 * (capa bloqueada). Pisos de letra: lectura ≥17px · apoyo ≥15px ·
 * etiquetas MAYÚSCULAS ≥13px · piso duro 13px. Tap ≥44px. Sin overflow a
 * 360px. Light-mode fijo. Sin border-left como única seña (borde completo).
 * ============================================================ */

/* ===== Paleta del tema (eco de las variables de marca) ===== */
.la-tr, .la-an, .la-rd, .la-ev, .la-legend, .la-tool {
  --la-var: #C75D08;     /* la variable (la letra) */
  --la-num: #283891;     /* coeficiente / número / operación */
  --la-exp: #1C7A3A;     /* exponente / resultado */
  --la-ink: #181B22;
  --la-mut: #4b5563;
  --la-line: #e7e2da;
  --la-cream: #FFF3E7;
}

/* ===== Leyenda de color ===== */
.la-legend {
  display: flex; flex-wrap: wrap; gap: 10px 18px;
  margin: 4px 0 18px; padding: 12px 14px;
  border: 2px solid var(--la-ink); border-radius: 14px; background: #fff;
}
.la-legend .it { display: flex; align-items: center; gap: 8px; font-size: 15px; color: var(--la-mut); }
.la-legend .it b { color: var(--la-ink); }
.la-legend .sw { width: 16px; height: 16px; border-radius: 5px; border: 1.5px solid var(--la-ink); flex: 0 0 auto; }
.la-legend .sw.var { background: var(--la-var); }
.la-legend .sw.num { background: var(--la-num); }
.la-legend .sw.exp { background: var(--la-exp); }

/* ===== Andamiaje común de widgets (borde completo + sombra sticker) ===== */
.la-tr, .la-an, .la-rd, .la-ev {
  margin: 16px 0; padding: 16px 14px;
  border: 2px solid var(--la-ink); border-radius: 16px; background: #fff;
  box-shadow: 4px 4px 0 var(--la-ink);
}
.la-wg-lead { margin: 0 0 12px; font-size: 17px; line-height: 1.45; color: var(--la-ink); }

/* Botón genérico del tema */
.la-btn {
  font: inherit; font-weight: 800; font-size: 17px; min-height: 44px; padding: 10px 18px;
  border: 2px solid var(--la-ink); border-radius: 12px; background: var(--la-num); color: #fff;
  cursor: pointer; box-shadow: 3px 3px 0 var(--la-ink); transition: transform .1s, box-shadow .1s;
}
.la-btn:hover { transform: translate(-2px, -2px); box-shadow: 5px 5px 0 var(--la-ink); }
.la-btn:active { transform: none; box-shadow: 1px 1px 0 var(--la-ink); }
.la-btn.ghost { background: #fff; color: var(--la-ink); box-shadow: none; }
.la-btn.ghost:hover { border-color: var(--la-var); transform: none; box-shadow: none; }
.la-btn.small { font-size: 15px; min-height: 40px; padding: 8px 14px; }

/* Opción genérica por toque (compartida por reducir) */
.la-opt {
  font: inherit; font-weight: 700; font-size: 17px; min-height: 48px; padding: 10px 16px;
  border: 2px solid var(--la-ink); border-radius: 12px; background: #fff; color: var(--la-ink);
  cursor: pointer; text-align: center; box-shadow: 3px 3px 0 var(--la-ink);
  transition: transform .1s, box-shadow .1s, border-color .1s, background .1s;
}
.la-opt:hover:not(:disabled) { transform: translate(-2px, -2px); box-shadow: 5px 5px 0 var(--la-ink); }
.la-opt.right { border-color: var(--la-exp); background: #e6f5ec; color: var(--la-exp); box-shadow: 3px 3px 0 var(--la-exp); }
.la-opt.wrong { border-color: #d6336c; background: #fdecf1; color: #a01243; box-shadow: 3px 3px 0 #d6336c; }
.la-opt:disabled { cursor: default; }

/* ===================================================================
 * ① TRADUCTOR
 * =================================================================== */
.la-tr-label {
  margin: 12px 0 6px; font-size: 13px; font-weight: 800; letter-spacing: .03em;
  text-transform: uppercase; color: var(--la-mut);
}
.la-tr-pieces { display: flex; flex-wrap: wrap; gap: 8px; }
.la-tr-piece {
  font: inherit; font-weight: 700; font-size: 17px; min-height: 44px; padding: 9px 14px;
  border: 2px dashed var(--la-ink); border-radius: 12px; background: #fcfbf9; color: var(--la-ink);
  cursor: pointer; transition: transform .1s, background .1s, border-color .1s, opacity .15s;
}
.la-tr-piece.var { border-color: var(--la-var); color: #8a3f05; }
.la-tr-piece.num { border-color: var(--la-num); color: var(--la-num); }
.la-tr-piece.op  { border-color: var(--la-mut); color: var(--la-mut); }
.la-tr-piece:hover:not(:disabled) { transform: translateY(-2px); background: #fff; }
.la-tr-piece.used { opacity: .45; border-style: solid; cursor: default; }

.la-tr-build {
  min-height: 56px; display: flex; align-items: center; flex-wrap: wrap; gap: 2px;
  padding: 12px 14px; border: 2px solid var(--la-line); border-radius: 12px; background: #fcfbf9;
  font-size: 24px;
}
.la-tr-empty { font-size: 15px; color: var(--la-mut); font-style: italic; }
.la-tr-sym .katex { font-size: 1.1em; }

.la-tr-fb { margin: 10px 0 0; font-size: 17px; line-height: 1.45; display: none; }
.la-tr-fb.show { display: block; }
.la-tr-fb.ok { color: var(--la-exp); }
.la-tr-fb.miss { color: #a01243; }
.la-tr-foot { margin-top: 12px; }

/* ===================================================================
 * ② ANATOMIA
 * =================================================================== */
.la-an-term {
  display: flex; align-items: flex-start; justify-content: center; gap: 2px;
  margin: 8px 0 14px; padding: 14px;
  border: 2px solid var(--la-line); border-radius: 12px; background: #fcfbf9;
}
.la-an-part {
  font: inherit; font-weight: 800; cursor: pointer; background: transparent;
  border: 2px solid transparent; border-radius: 10px; padding: 4px 6px; line-height: 1;
  transition: background .12s, border-color .12s, transform .1s; color: var(--la-ink);
  position: relative;
}
.la-an-part.num { font-size: 40px; color: var(--la-num); }
.la-an-part.var { font-size: 40px; color: var(--la-var); font-style: italic; }
.la-an-part.exp { font-size: 22px; color: var(--la-exp); align-self: flex-start; margin-top: 2px; }
/* Tap target ≥44px del exponente (botón chico por diseño): amplía el área de
 * toque sin cambiar el visual; no se extiende a la izquierda para no pisar
 * el botón de la variable. */
.la-an-part.exp::after { content: ""; position: absolute; top: -8px; bottom: -8px; left: -2px; right: -18px; }
.la-an-part:hover { transform: translateY(-2px); }
.la-an-part.num.on { background: #eef0fb; border-color: var(--la-num); }
.la-an-part.var.on { background: var(--la-cream); border-color: var(--la-var); }
.la-an-part.exp.on { background: #e6f5ec; border-color: var(--la-exp); }

.la-an-info { min-height: 64px; text-align: center; }
.la-an-hint { margin: 0; font-size: 15px; color: var(--la-mut); font-style: italic; }
.la-an-name { margin: 0 0 4px; font-size: 18px; font-weight: 800; }
.la-an-name.num { color: var(--la-num); }
.la-an-name.var { color: var(--la-var); }
.la-an-name.exp { color: var(--la-exp); }
.la-an-desc { margin: 0; font-size: 17px; line-height: 1.45; color: var(--la-ink); }

/* ===================================================================
 * ③ REDUCIR
 * =================================================================== */
.la-rd-prog { margin: 0 0 8px; font-size: 13px; font-weight: 800; text-transform: uppercase; letter-spacing: .03em; color: var(--la-mut); }
.la-rd-card { border: 2px solid var(--la-line); border-radius: 12px; padding: 14px; background: #fcfbf9; }
.la-rd-pair { font-size: 22px; text-align: center; margin: 2px 0 10px; overflow-x: auto; }
.la-rd-q { margin: 0 0 10px; font-size: 17px; font-weight: 800; color: var(--la-num); }
.la-rd-opts { display: flex; flex-direction: column; gap: 8px; }
.la-rd-fb { margin: 10px 0 0; font-size: 15px; line-height: 1.45; display: none; }
.la-rd-fb.show { display: block; }
.la-rd-fb.ok { color: var(--la-exp); }
.la-rd-fb.miss { color: #a01243; }
.la-rd-done { margin: 0 0 12px; font-size: 17px; line-height: 1.5; color: var(--la-ink); }

/* ===================================================================
 * ④ EVALUADOR
 * =================================================================== */
.la-ev-expr {
  font-size: 26px; text-align: center; margin: 4px 0 12px; padding: 10px;
  border: 2px solid var(--la-line); border-radius: 12px; background: #fcfbf9; overflow-x: auto;
}
.la-ev-label { margin: 0 0 8px; font-size: 13px; font-weight: 800; text-transform: uppercase; letter-spacing: .03em; color: var(--la-mut); }
.la-ev-chips { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 4px; }
.la-ev-chip {
  font: inherit; font-weight: 800; font-size: 17px; min-height: 44px; padding: 9px 16px;
  border: 2px solid var(--la-num); border-radius: 12px; background: #fff; color: var(--la-num);
  cursor: pointer; transition: transform .1s, background .1s, color .1s;
}
.la-ev-chip:hover { transform: translateY(-2px); }
.la-ev-chip.on { background: var(--la-num); color: #fff; }
.la-ev-steps { list-style: none; margin: 12px 0 0; padding: 0; }
.la-ev-steps li {
  font-size: 22px; padding: 8px 12px; margin: 6px 0; border-radius: 10px;
  border: 2px solid var(--la-line); background: #fff; overflow-x: auto;
}
.la-ev-steps li.res { border-color: var(--la-exp); background: #e6f5ec; font-weight: 700; }

/* ===================================================================
 * Herramienta libre: tabs del traductor
 * =================================================================== */
.la-tool-tabs { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 12px; }
.la-tool-tab {
  font: inherit; font-weight: 700; font-size: 15px; min-height: 44px; padding: 8px 14px;
  border: 2px solid var(--la-line); border-radius: 999px; background: #fff; color: var(--la-mut);
  cursor: pointer; transition: border-color .1s, color .1s, background .1s;
}
.la-tool-tab:hover { border-color: var(--la-var); color: var(--la-ink); }
.la-tool-tab.on { border-color: var(--la-num); color: var(--la-num); background: #eef0fb; }

/* ===== 360px: sin overflow horizontal ===== */
@media (max-width: 380px) {
  .la-tr-build, .la-ev-expr, .la-rd-pair { font-size: 20px; }
  .la-an-part.num, .la-an-part.var { font-size: 34px; }
  .la-tr-piece, .la-opt, .la-ev-chip { font-size: 16px; }
}

/* ===== Movimiento reducido ===== */
@media (prefers-reduced-motion: reduce) {
  .la-tr-piece, .la-opt, .la-btn, .la-an-part, .la-ev-chip, .la-tool-tab { transition: none !important; }
}

/* ===== Impresión: oculta lo interactivo (apoyo, no contenido SEO) ===== */
@media print {
  .la-tr, .la-an, .la-rd, .la-ev, .la-tool { display: none !important; }
}