/* =========================================================
   Fine-tuning   componentes só desta página

   Camada 3 de 3: styles.css → llm.css → didatica.css → aqui.
   A árvore de decisão, os cartões de qualidade e a régua do
   intervalo de confiança.
   ========================================================= */

/* =========================
   Árvore de decisão
   ========================= */
.ftn-tree {
  display: flex;
  flex-direction: column;
  gap: calc(var(--sm) / 1.3);
  margin-top: var(--md);
}

/* pergunta já respondida: fica como rastro do caminho */
.ftn-asked {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: calc(var(--sm) / 1.6);
  padding: calc(var(--sm) / 1.6) var(--sm);
  border-left: 3px solid var(--hair);
  border-radius: 0 8px 8px 0;
  background: rgba(14, 16, 22, .025);
}

.ftn-asked__q {
  font-size: calc(var(--sm) / 1.02);
  color: var(--ink-45);
}

.ftn-asked__a {
  font-size: calc(var(--md) / 1.08);
  font-weight: 700;
  color: var(--bg);
}

/* a pergunta aberta */
.ftn-q {
  padding: var(--md);
  border: 1px solid var(--hair);
  border-radius: 10px;
  background: #fff;
}

.ftn-q__label {
  font-size: calc(var(--sm) / 1.14);
  text-transform: uppercase;
  letter-spacing: .1em;
  color: var(--ink-45);
  margin-bottom: calc(var(--sm) / 2.4);
}

.ftn-q__text {
  font-size: calc(var(--md) * 1.06);
  font-weight: 700;
  margin-bottom: var(--md);
}

.ftn-q__opts {
  display: flex;
  flex-wrap: wrap;
  gap: calc(var(--sm) / 1.4);
}

.ftn-q__opts button {
  flex: 1 1 220px;
  padding: calc(var(--sm) / 1.2) var(--sm);
  border: 1px solid var(--hair);
  border-radius: 9px;
  background: #fff;
  font-size: calc(var(--md) / 1.06);
  line-height: 1.4;
  text-align: left;
  transition: border-color .2s ease, background .2s ease, transform .2s ease;
}

.ftn-q__opts button:hover {
  border-color: var(--prompt-green);
  background: rgba(63, 185, 80, .06);
  transform: translateY(-2px);
}

/* o veredito */
.ftn-verdict {
  padding: var(--md);
  border: 1px solid var(--c, var(--prompt-green));
  border-left-width: 4px;
  border-radius: 10px;
  background: color-mix(in srgb, var(--c, var(--prompt-green)) 6%, #fff);
}

.ftn-verdict__tag {
  font-size: calc(var(--sm) / 1.14);
  text-transform: uppercase;
  letter-spacing: .1em;
  color: var(--c, var(--prompt-green));
  margin-bottom: 2px;
}

.ftn-verdict__name {
  font-size: calc(var(--lg) / 1.5);
  font-weight: 700;
  color: var(--c, var(--bg));
  margin-bottom: calc(var(--sm) / 1.6);
}

/* =========================
   Cartões de qualidade do conjunto
   ========================= */
.ftn-quals {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--md);
  margin-top: var(--md);
}

.ftn-qual {
  padding: var(--sm);
  border: 1px solid var(--hair-soft);
  border-radius: 10px;
  background: #fff;
  text-align: left;
  transition: border-color .2s ease, background .2s ease;
}

.ftn-qual:hover { border-color: var(--ink-45); }

.ftn-qual.is-on {
  border-color: var(--prompt-green);
  background: rgba(63, 185, 80, .06);
}

.ftn-qual b { display: block; font-size: calc(var(--md) / 1.04); }

.ftn-qual small {
  display: block;
  margin-top: calc(var(--sm) / 2.4);
  font-size: calc(var(--sm) / 1.06);
  color: var(--ink-60);
  line-height: 1.5;
}

/* =========================
   Régua do intervalo de confiança
   ========================= */
.ftn-ruler {
  position: relative;
  height: 34px;
  margin-top: var(--md);
  border-radius: 8px;
  background: rgba(14, 16, 22, .05);
  overflow: hidden;
}

/* a faixa: onde o desempenho verdadeiro pode estar */
.ftn-ruler__band {
  position: absolute;
  top: 0;
  bottom: 0;
  background: color-mix(in srgb, var(--c-purple) 26%, transparent);
  border-left: 1px solid var(--c-purple);
  border-right: 1px solid var(--c-purple);
  transition: left .25s ease, width .25s ease;
}

/* o ponto observado, que é só um ponto dentro da faixa */
.ftn-ruler__mark {
  position: absolute;
  top: -2px;
  bottom: -2px;
  width: 2px;
  background: var(--c-pink);
  transition: left .25s ease;
}

.ftn-need {
  margin-top: var(--md);
  padding: calc(var(--sm) / 1.3) var(--sm);
  border-left: 3px solid var(--c-amber);
  border-radius: 0 8px 8px 0;
  background: rgba(167, 106, 0, .07);
  font-size: calc(var(--md) / 1.08);
  color: var(--ink-80);
}

/* =========================
   Leitura grande
   ========================= */
.ftn-big {
  font-family: var(--font-mono);
  font-size: calc(var(--lg) / 1.2);
  font-weight: 700;
  line-height: 1;
  color: var(--bg);
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

/* =========================
   Responsivo
   ========================= */
@media (max-width: 900px) {
  .ftn-quals { grid-template-columns: 1fr; }
}

@media (max-width: 640px) {
  .ftn-q__opts button { flex-basis: 100%; }
  .ftn-big { font-size: var(--md); }
  .ftn-verdict__name { font-size: calc(var(--md) * 1.1); }
}