/* ============================================================
   PÁGINAS INTERNAS — projeto, experiência e erro.
   ============================================================ */

/* ------------------------------------------------------------
   HERO DAS PÁGINAS DE DETALHE
   ------------------------------------------------------------ */
.page-hero {
  position: relative;
  padding-block: calc(var(--nav-h) + var(--sp-16)) var(--sp-12);
  overflow: hidden;
  border-bottom: 1px solid var(--line);
}
.page-hero::before {
  content: '';
  position: absolute;
  left: 50%;
  top: -30%;
  width: min(1200px, 150vw);
  aspect-ratio: 2 / 1;
  transform: translateX(-50%);
  background: radial-gradient(closest-side, rgba(90, 131, 240, 0.14), transparent 70%);
  filter: blur(24px);
  pointer-events: none;
}
.page-hero::after {
  content: '';
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0.4;
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 68px 68px;
  mask-image: radial-gradient(80% 70% at 50% 0%, #000, transparent 72%);
  -webkit-mask-image: radial-gradient(80% 70% at 50% 0%, #000, transparent 72%);
}

.page-hero__inner { position: relative; display: grid; gap: var(--sp-6); }

.breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  flex-wrap: wrap;
  font-family: var(--font-mono);
  font-size: var(--fs-mono);
  color: var(--txt-3);
}
.breadcrumb a { transition: color var(--d-fast) var(--ease-smooth); }
.breadcrumb a:hover { color: var(--txt-1); }
.breadcrumb span { color: var(--line-3); }
.breadcrumb strong { color: var(--txt-2); font-weight: 400; }

.page-hero__meta { display: flex; flex-wrap: wrap; gap: var(--sp-2); }
.page-hero__title {
  font-size: var(--fs-h1);
  font-weight: 500;
  letter-spacing: var(--tr-tight);
  line-height: 1.04;
  max-width: 20ch;
}
.page-hero__sub { font-size: var(--fs-lg); color: var(--txt-2); max-width: 56ch; }
.page-hero__actions { display: flex; flex-wrap: wrap; gap: var(--sp-3); margin-top: var(--sp-2); }

/* Ficha técnica */
.factsheet {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(180px, 100%), 1fr));
  gap: 0;
  margin-top: var(--sp-8);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: linear-gradient(180deg, rgba(14, 14, 19, 0.75), rgba(8, 8, 11, 0.4));
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: var(--highlight);
  overflow: hidden;
}
.factsheet__cell {
  display: grid;
  gap: var(--sp-2);
  padding: var(--sp-5);
  border-right: 1px solid var(--line);
}
.factsheet__cell:last-child { border-right: 0; }
.factsheet__cell dt {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--txt-3);
}
.factsheet__cell dd { font-size: var(--fs-sm); font-weight: 500; color: var(--txt-1); line-height: 1.45; }

@media (max-width: 700px) {
  .factsheet__cell { border-right: 0; border-bottom: 1px solid var(--line); }
  .factsheet__cell:last-child { border-bottom: 0; }
}

/* ------------------------------------------------------------
   CORPO DAS PÁGINAS DE DETALHE
   ------------------------------------------------------------ */
.page-body { padding-block: var(--section-y); }

.page-layout {
  display: grid;
  gap: clamp(2.5rem, 1.5rem + 4vw, 5rem);
  grid-template-columns: minmax(0, 1fr) 280px;
  align-items: start;
}

/* Índice lateral fixo */
.page-aside {
  position: sticky;
  top: calc(var(--nav-h) + var(--sp-6));
  display: grid;
  gap: var(--sp-5);
}
.toc {
  display: grid;
  gap: var(--sp-1);
  padding: var(--sp-5);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: var(--glass);
}
.toc h2 {
  font-family: var(--font-mono);
  font-size: var(--fs-mono);
  letter-spacing: var(--tr-wide);
  text-transform: uppercase;
  color: var(--txt-3);
  font-weight: 500;
  margin-bottom: var(--sp-2);
}
.toc a {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  padding: var(--sp-2) var(--sp-3);
  border-radius: var(--r-xs);
  font-size: var(--fs-sm);
  color: var(--txt-2);
  border-left: 2px solid transparent;
  transition: color var(--d-fast) var(--ease-smooth), border-color var(--d-fast) var(--ease-smooth), background var(--d-fast) var(--ease-smooth);
}
.toc a:hover { color: var(--txt-1); background: var(--glass); }
.toc a.is-active { color: var(--txt-1); border-left-color: var(--accent); background: var(--accent-dim); }

.page-block { padding-block: var(--sp-10) 0; scroll-margin-top: calc(var(--nav-h) + var(--sp-6)); }
.page-block:first-child { padding-top: 0; }
.page-block__title {
  display: flex;
  align-items: baseline;
  gap: var(--sp-4);
  font-size: var(--fs-h3);
  font-weight: 550;
  letter-spacing: var(--tr-snug);
  margin-bottom: var(--sp-6);
}
.page-block__title::before {
  content: attr(data-index);
  font-family: var(--font-mono);
  font-size: var(--fs-mono);
  color: var(--accent);
  letter-spacing: 0.08em;
}
.page-prose { display: grid; gap: var(--sp-4); max-width: 68ch; }
.page-prose p { color: var(--txt-2); line-height: var(--lh-relaxed); text-wrap: pretty; }

/* Listas de objetivo / desafio / solução */
.checklist { display: grid; gap: var(--sp-3); max-width: 70ch; }
.checklist li {
  display: flex;
  align-items: flex-start;
  gap: var(--sp-3);
  padding: var(--sp-4) var(--sp-5);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: var(--glass);
  font-size: var(--fs-sm);
  color: var(--txt-2);
  line-height: 1.6;
  transition: border-color var(--d-base) var(--ease-smooth), background var(--d-base) var(--ease-smooth);
}
.checklist li:hover { border-color: var(--line-2); background: var(--glass-2); }
.checklist li::before {
  content: '';
  width: 18px;
  height: 18px;
  margin-top: 2px;
  flex-shrink: 0;
  border-radius: var(--r-full);
  border: 1px solid var(--accent-line);
  background:
    linear-gradient(var(--accent), var(--accent)) center / 7px 1.5px no-repeat,
    var(--accent-dim);
}
.checklist--challenge li::before {
  border-color: rgba(224, 178, 92, 0.35);
  background:
    linear-gradient(#e0b25c, #e0b25c) center / 1.5px 7px no-repeat,
    linear-gradient(#e0b25c, #e0b25c) center / 7px 1.5px no-repeat,
    rgba(224, 178, 92, 0.1);
  transform: rotate(45deg);
}
/* Marca de confirmação de verdade — a versão anterior desenhava uma
   diagonal, que lida como símbolo de "proibido". */
.checklist--solution li::before {
  border-color: rgba(78, 195, 138, 0.35);
  background-color: var(--ok-dim);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%234ec38a' stroke-width='3.2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M20 6 9 17l-5-5'/%3E%3C/svg%3E");
  background-size: 11px 11px;
  background-position: center;
  background-repeat: no-repeat;
}

/* Resultados em destaque */
.result-grid {
  display: grid;
  gap: var(--sp-4);
  grid-template-columns: repeat(auto-fit, minmax(min(230px, 100%), 1fr));
}
.result-card {
  display: grid;
  gap: var(--sp-2);
  padding: var(--sp-6);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: linear-gradient(160deg, var(--accent-dim), transparent 65%);
  transition: border-color var(--d-base) var(--ease-smooth), transform var(--d-base) var(--ease-out);
}
.result-card:hover { border-color: var(--accent-line); transform: translateY(-3px); }
.result-card b {
  font-size: clamp(1.5rem, 1.2rem + 1.4vw, 2.25rem);
  font-weight: 600;
  letter-spacing: var(--tr-tight);
  color: var(--accent-bright);
  line-height: 1.1;
}
.result-card span { font-size: var(--fs-sm); font-weight: 500; color: var(--txt-1); }
.result-card small { font-size: var(--fs-xs); color: var(--txt-3); line-height: 1.5; }

/* Área que ainda não tem conteúdo */
.placeholder-box {
  display: grid;
  place-items: center;
  gap: var(--sp-3);
  padding: var(--sp-16) var(--sp-6);
  text-align: center;
  border: 1px dashed var(--line-2);
  border-radius: var(--r-lg);
  background: var(--glass);
}
.placeholder-box svg { width: 26px; height: 26px; color: var(--txt-3); }
.placeholder-box p { font-size: var(--fs-sm); color: var(--txt-3); max-width: 44ch; }
.placeholder-box code {
  font-family: var(--font-mono);
  font-size: var(--fs-mono);
  padding: 2px 7px;
  border-radius: var(--r-xs);
  border: 1px solid var(--line);
  background: var(--bg-2);
  color: var(--accent-soft);
}

/* Navegação entre itens (anterior / próximo) */
.page-nav {
  display: grid;
  gap: var(--sp-4);
  grid-template-columns: repeat(2, minmax(0, 1fr));
  padding-block: var(--sp-12);
  border-top: 1px solid var(--line);
}
.page-nav__item {
  display: grid;
  gap: var(--sp-2);
  padding: var(--sp-6);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: var(--glass);
  transition: border-color var(--d-base) var(--ease-smooth), background var(--d-base) var(--ease-smooth), transform var(--d-base) var(--ease-out);
}
.page-nav__item:hover { border-color: var(--line-2); background: var(--glass-2); transform: translateY(-2px); }
.page-nav__item--next { text-align: right; }
.page-nav__label {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  font-family: var(--font-mono);
  font-size: var(--fs-mono);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--txt-3);
}
/* Sem isto o SVG assume o tamanho intrínseco e domina o card. */
.page-nav__label svg { width: 14px; height: 14px; flex-shrink: 0; }
.page-nav__item:hover .page-nav__label { color: var(--accent-soft); }
.page-nav__item--next .page-nav__label { justify-content: flex-end; }
.page-nav__title { font-size: var(--fs-h4); font-weight: 550; letter-spacing: var(--tr-snug); }
.page-nav__item--empty { opacity: 0.4; pointer-events: none; }

/* Faixa final de conversão */
.cta-band {
  position: relative;
  overflow: hidden;
  padding: clamp(2.5rem, 1.5rem + 4vw, 4.5rem);
  border: 1px solid var(--line-2);
  border-radius: var(--r-xl);
  background:
    radial-gradient(50rem 26rem at 50% 0%, rgba(90, 131, 240, 0.14), transparent 65%),
    linear-gradient(180deg, rgba(14, 14, 19, 0.9), rgba(8, 8, 11, 0.8));
  box-shadow: var(--highlight), var(--sh-lg);
  text-align: center;
  display: grid;
  gap: var(--sp-5);
  justify-items: center;
}
.cta-band h2 { font-size: var(--fs-h2); letter-spacing: var(--tr-tight); max-width: 18ch; }
.cta-band p { color: var(--txt-2); max-width: 52ch; }
.cta-band__actions { display: flex; flex-wrap: wrap; gap: var(--sp-3); justify-content: center; margin-top: var(--sp-2); }

@media (max-width: 980px) {
  .page-layout { grid-template-columns: 1fr; }
  .page-aside { position: static; order: -1; }
  .toc { display: none; }
}
@media (max-width: 640px) {
  .page-nav { grid-template-columns: 1fr; }
  .page-nav__item--next { text-align: left; }
  .page-nav__item--next .page-nav__label { justify-content: flex-start; }
}

/* ------------------------------------------------------------
   PÁGINA 404
   ------------------------------------------------------------ */
.error-page {
  min-height: 100svh;
  display: grid;
  place-items: center;
  text-align: center;
  padding: calc(var(--nav-h) + var(--sp-16)) var(--gutter) var(--sp-16);
  position: relative;
  overflow: hidden;
}
.error-page__code {
  font-family: var(--font-mono);
  font-size: clamp(4rem, 2rem + 12vw, 9rem);
  font-weight: 700;
  letter-spacing: -0.04em;
  line-height: 1;
  background: linear-gradient(180deg, #ffffff 25%, #3b3f4a 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.error-page__inner { position: relative; display: grid; gap: var(--sp-5); justify-items: center; max-width: 46ch; }

/* Estado de carregamento / conteúdo não encontrado */
.state {
  display: grid;
  place-items: center;
  gap: var(--sp-4);
  padding: var(--sp-24) var(--sp-6);
  text-align: center;
}
.spinner {
  width: 26px;
  height: 26px;
  border-radius: var(--r-full);
  border: 2px solid var(--line-2);
  border-top-color: var(--accent);
  animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }