/* Aula 4: o esquema do produto (a matriz da direita em cima, a da esquerda ao lado, o produto
   embaixo à direita), as quatro leituras, a calculadora de custo e as rotas da parte em ℝⁿ. */

/* A regra .dm-tile span (o rótulo do quadro, em caixa alta) também pegaria a notação dentro de
   small e strong: (Nᵏ)ᵢⱼ viraria (NK)IJ. */
.dm-tile small span,.dm-tile strong span{font-size:inherit;font-weight:inherit;letter-spacing:0;text-transform:none;color:inherit}
.dm-tile small .m,.dm-tile strong .m{font-size:1.08em;font-weight:400}

/* Esquema do produto: linhas da esquerda alinhadas com as linhas do produto, colunas de cima
   alinhadas com as colunas do produto (células de tamanho fixo). */
.a4-falk-wrap{overflow-x:auto;padding:4px 2px 6px}
.a4-falk{display:grid;grid-template-columns:auto auto;grid-template-rows:auto auto;gap:8px 16px;width:max-content;margin:0 auto}
.a4-canto{grid-column:1;grid-row:1;align-self:end;justify-self:end;text-align:right;font-size:13.5px;font-weight:700;line-height:1.45;color:var(--muted);padding-bottom:6px;font-variant-numeric:tabular-nums}
.a4-bloco{display:flex;flex-direction:column;gap:3px;min-width:0}
.a4-bloco-dir{grid-column:2;grid-row:1;align-self:end;justify-self:start}
.a4-bloco-esq{grid-column:1;grid-row:2;align-self:start;justify-self:end;align-items:flex-end}
.a4-bloco-prod{grid-column:2;grid-row:2;align-self:start;justify-self:start}
.a4-nome{font-size:12.5px;font-weight:750;color:var(--muted);white-space:nowrap}
.a4-nome .m{font-size:1.2em;color:var(--ink)}
.a4-falk .a4-mx{margin:0}
.a4-falk .a4-mx .dm-c{width:2.6em;height:1.85em;display:grid;place-items:center;padding:0}
.a4-fator{cursor:pointer}
.a4-cel{font:inherit;color:inherit;background:transparent;border:0;cursor:pointer;-webkit-tap-highlight-color:transparent}
.a4-cel:hover{background:#f4f4f3}
.a4-mx .a4-cel.is-linha:hover{background:#fde5e8}
.a4-mx .a4-cel.is-coluna:hover{background:#e6eef7}
.a4-palpite{width:2.45em;height:1.62em;font-family:var(--math);font-size:.92em;text-align:center;border:1.5px solid var(--line);border-radius:5px;background:#fff;color:var(--ink);padding:0;font-variant-numeric:tabular-nums}
.a4-palpite:focus{border-color:var(--red);outline:none;box-shadow:0 0 0 3px #db1e2f33}
.a4-palpite.is-certa{border-color:var(--true);background:#e5f2e8;color:var(--true);font-weight:700}
.a4-palpite.is-errada{border-color:var(--red);background:var(--red-soft)}
.a4-sem-produto{max-width:280px;padding:10px 12px;border:1.5px dashed var(--red);border-radius:10px;background:var(--red-soft);font-size:13.5px;line-height:1.5;color:#5c1019;gap:4px}
.a4-sem-produto strong{font-size:14.5px}
.a4-dim-ok{color:var(--true);font-weight:800}
.a4-dim-erro{color:var(--red-dark);font-weight:800}

/* As quatro leituras */
.a4-leituras{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}
.a4-leitura{border:1.5px solid var(--line);border-radius:10px;padding:10px 12px;display:grid;gap:6px;min-width:0;align-content:start;background:#fff;cursor:pointer;transition:border-color .2s ease,box-shadow .2s ease}
.a4-leitura:hover{border-color:var(--ink-2)}
.a4-leitura h3{display:flex;align-items:center;gap:8px;font-size:11.5px;font-weight:800;letter-spacing:.12em;text-transform:uppercase;color:var(--red-dark)}
.a4-n{display:inline-grid;place-items:center;flex:none;width:20px;height:20px;border-radius:50%;background:var(--gray-soft);color:var(--ink);font-size:11.5px;letter-spacing:0}
.a4-leitura.is-ativa{border-color:var(--red);box-shadow:0 0 0 3px #db1e2f1f}
.a4-leitura.is-fixa .a4-n{background:var(--red);color:#fff}
.a4-leitura .dm-campo{cursor:default}
.a4-leitura-corpo{font-size:14.5px;line-height:1.6;color:var(--ink-2);overflow-x:auto;min-width:0;display:grid;gap:4px}
.a4-leitura-corpo .m{font-size:1.06em}
.a4-leitura-corpo strong{color:var(--ink)}
.a4-conta{display:flex;flex-wrap:wrap;align-items:center;gap:4px 6px;font-family:var(--math);font-size:16px}
.a4-conta .op{color:var(--ink-2);padding:0 1px}
.a4-conta .dm-mx{margin:.05em 0}
.a4-conta [data-tipo],.a4-conta .dm-desc{font-family:var(--sans);font-size:13.5px}
.a4-coef{font-family:var(--math);font-size:16px}

/* Comparação AB × BA e etapas */
.a4-comp{display:inline-flex;align-items:center;gap:6px}
.a4-comp .dm-desc{font-family:var(--sans)}
.a4-etapas{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:8px 16px;align-items:end}
.a4-editores{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,150px),1fr));gap:10px 14px}
.a4-editor{display:grid;gap:6px;align-content:start;min-width:0}

/* Barras de custo */
.a4-custo,.a4-custos{display:grid;gap:8px}
.a4-custo-linha{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:1px 10px;align-items:baseline;font-size:13.5px;line-height:1.4;color:var(--ink-2)}
.a4-custo-linha strong{font-variant-numeric:tabular-nums;color:var(--ink)}
.a4-formula{grid-column:1/-1;font-size:12.5px;color:var(--muted)}
.a4-formula:empty{display:none}
.a4-barra{grid-column:1/-1;display:block;height:9px;border-radius:5px;background:var(--gray-soft);overflow:hidden;margin-top:2px}
.a4-barra span{display:block;height:100%;border-radius:5px;background:var(--grafite,#5d5859);transition:width .35s ease}
.a4-barra.is-barata span,.a4-barra.is-melhor span{background:var(--true)}
.a4-barra.is-cara span,.a4-barra.is-pior span{background:var(--red)}
.a4-barra.is-sua span{background:var(--ink)}
.a4-veredito-custo{font-size:14px;font-weight:750;color:var(--ink)}
@media(prefers-reduced-motion:reduce){.a4-barra span{transition:none}}

/* Rotas e cadeia (ℝⁿ) */
.a4-rotas,.a4-juncoes{display:flex;flex-wrap:wrap;align-items:center;gap:6px}
.a4-rota,.a4-juncao{font:inherit;font-size:13px;font-weight:750;line-height:1.35;padding:5px 11px;border-radius:999px;border:1.5px solid var(--line);background:#fff;color:var(--ink-2);cursor:pointer;font-variant-numeric:tabular-nums}
.a4-rota:hover,.a4-juncao:hover{border-color:var(--ink-2)}
.a4-rota[aria-pressed=true]{border-color:var(--red);background:var(--red-soft);color:#5c1019}
.a4-juncao{display:inline-flex;align-items:baseline;gap:8px}
.a4-juncao .m{font-size:1.1em}
.a4-juncao small{font-size:11.5px;font-weight:750;color:var(--muted)}
.a4-percorrer{padding:5px 12px;font-size:13px}
.a4-cadeia-controles{display:grid;grid-template-columns:minmax(160px,240px) minmax(0,1fr);gap:8px 16px;align-items:end}
.a4-par{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}

@media(max-width:760px){
 .a4-leituras{grid-template-columns:minmax(0,1fr)}
 .a4-cadeia-controles,.a4-etapas{grid-template-columns:minmax(0,1fr)}
}
@media(max-width:420px){
 .a4-falk{gap:6px 10px}
 .a4-falk .a4-mx .dm-c{width:2.35em}
}