/**
 * Conteúdos Backlab — hub (/conteudos/) e artigo (single). Fase 21.
 * Eixo horizontal: `.bl-container` global (mesmo do Header/Footer). Estado final no CSS.
 */

.bl-ch,
.bl-article {
	--bl-ch-section: clamp(4.5rem, 8vw, 7.5rem);
	--bl-ch-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
	--bl-ch-line: rgba(255, 255, 255, 0.1);
	background: var(--bl-bg-deep);
	color: var(--bl-text-primary);
}

.bl-ch .bl-rb-eyebrow,
.bl-article .bl-rb-eyebrow { color: var(--bl-color-brand-light); }

/* ==========================================================================
   COVERS (SVG por tema)
   ========================================================================== */
.bl-cover { display: block; inline-size: 100%; block-size: 100%; }
.bl-cover__move { transition: transform 600ms var(--bl-ease-out, ease); transform-box: fill-box; transform-origin: center; }
.bl-cover__art { transition: opacity 400ms ease; }

a:hover .bl-cover__move,
a:focus-visible .bl-cover__move { transform: translate(10px, -6px); }
.bl-cover--sucesso-do-cliente a:hover .bl-cover__move { transform: rotate(8deg); }

/* ==========================================================================
   HERO (21.1: título + índice tipográfico dos temas; sem diagrama)
   ========================================================================== */
.bl-ch-hero {
	position: relative;
	padding-block: clamp(3.5rem, 7vw, 6.5rem) clamp(3rem, 6vw, 5rem);
	background: radial-gradient(48rem 28rem at 12% 20%, rgba(61, 191, 176, 0.06), transparent 70%), var(--bl-bg-deep);
}

.bl-ch-hero__grid { display: grid; gap: clamp(2.5rem, 5vw, 5rem); align-items: end; }
.bl-ch-hero__title { max-inline-size: 13ch; }
.bl-ch-hero .bl-rb-lead { max-inline-size: 46ch; }

@media (min-width: 1024px) {
	.bl-ch-hero__grid { grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr); }
}

.bl-ch-index { scroll-margin-top: calc(var(--bl-header-height, 5rem) + 1rem); }
.bl-ch-index__title { margin: 0 0 0.75rem; font: 500 0.7rem/1 var(--bl-ch-mono); letter-spacing: 0.14em; text-transform: uppercase; color: var(--bl-text-muted); }
.bl-ch-index__list { margin: 0; padding: 0; list-style: none; border-block-start: 1px solid var(--bl-border); }
.bl-ch-index__list li { border-block-end: 1px solid var(--bl-border); }

.bl-ch-index__item {
	display: grid;
	grid-template-columns: 2rem minmax(0, 1fr) auto 1.25rem;
	align-items: center;
	gap: 0.75rem;
	min-block-size: 3.5rem;
	padding-inline: 0.25rem;
	color: var(--bl-text-primary);
	text-decoration: none;
	transition: background-color 220ms ease, padding 220ms var(--bl-ease-out, ease);
}

.bl-ch-index__num { font: 500 0.72rem/1 var(--bl-ch-mono); color: var(--bl-color-brand-light); }
.bl-ch-index__label { font-size: 1.05rem; font-weight: 500; letter-spacing: -0.01em; }
.bl-ch-index__count { font-size: 0.78rem; color: var(--bl-text-muted); }
.bl-ch-index__arrow { color: var(--bl-text-muted); transition: transform 220ms ease, color 220ms ease; }

.bl-ch-index__item:hover,
.bl-ch-index__item:focus-visible { background: rgba(61, 191, 176, 0.05); padding-inline: 0.75rem 0.5rem; }
.bl-ch-index__item:hover .bl-ch-index__arrow,
.bl-ch-index__item:focus-visible .bl-ch-index__arrow { color: var(--bl-color-brand-light); transform: translateX(3px); }
.bl-ch-index__item:focus-visible { outline: 2px solid var(--bl-color-brand); outline-offset: 2px; }

@media (max-width: 479px) {
	.bl-ch-index__item { grid-template-columns: 1.75rem minmax(0, 1fr) auto; }
	.bl-ch-index__arrow { display: none; }
	.bl-ch-index__label { font-size: 0.98rem; }
}

/* ==========================================================================
   NAVEGAÇÃO FIXA POR TEMA (faixa fina; rolagem horizontal quando não cabe)
   ========================================================================== */
.bl-ch-topics {
	position: sticky;
	/* O Header fica compacto (4.5rem) assim que a página rola. */
	inset-block-start: var(--bl-header-compact-height, 4.5rem);
	z-index: 20;
	border-block: 1px solid var(--bl-border);
	background: rgba(5, 7, 7, 0.92);
	backdrop-filter: blur(12px);
}

.bl-ch-topics__list {
	display: flex;
	gap: 0.25rem;
	margin: 0;
	padding: 0.5rem 0;
	list-style: none;
	overflow-x: auto;
	scrollbar-width: none;
}

.bl-ch-topics__list::-webkit-scrollbar { display: none; }

.bl-ch-topics__item {
	display: inline-flex;
	align-items: center;
	min-block-size: 2.5rem;
	padding-inline: 0.9rem;
	border-radius: var(--bl-radius-pill, 999px);
	font-size: 0.86rem;
	font-weight: 500;
	white-space: nowrap;
	color: var(--bl-text-secondary);
	text-decoration: none;
	transition: color 200ms ease, background-color 200ms ease;
}

.bl-ch-topics__item:hover { color: var(--bl-text-primary); }
.bl-ch-topics__item:focus-visible { outline: 2px solid var(--bl-color-brand); outline-offset: -2px; }
.bl-ch-topics__item.is-active { color: var(--bl-bg-deep); background: var(--bl-color-brand); }

/* ==========================================================================
   CARD DE ARTIGO DO HUB (só texto)
   ========================================================================== */
.bl-ch-post__link {
	display: flex;
	flex-direction: column;
	gap: 0.75rem;
	block-size: 100%;
	padding: clamp(1.4rem, 2.5vw, 2rem);
	border: 1px solid var(--bl-border);
	border-radius: var(--bl-radius-md);
	background: var(--bl-surface-1);
	color: inherit;
	text-decoration: none;
	transition: border-color 240ms ease, background-color 240ms ease, transform 240ms var(--bl-ease-out, ease);
}

.bl-ch-post__time { font: 500 0.7rem/1.4 var(--bl-ch-mono); letter-spacing: 0.06em; text-transform: uppercase; color: var(--bl-text-muted); }
.bl-ch-post__title { margin: 0; font-size: clamp(1.15rem, 1rem + 0.45vw, 1.35rem); font-weight: 600; line-height: 1.25; letter-spacing: -0.015em; text-wrap: balance; color: var(--bl-text-primary); }
.bl-ch-post__excerpt { font-size: 0.94rem; line-height: 1.6; color: var(--bl-text-secondary); display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }
.bl-ch-post__cta { display: inline-flex; align-items: center; gap: 0.45rem; margin-block-start: auto; padding-block-start: 0.5rem; font-size: 0.9rem; font-weight: 600; color: var(--bl-color-brand-light); }
.bl-ch-post__cta span { transition: transform 220ms ease; }

.bl-ch-post__link:hover,
.bl-ch-post__link:focus-visible { border-color: var(--bl-border-active); background: var(--bl-surface-2); transform: translateY(-2px); }
.bl-ch-post__link:hover .bl-ch-post__cta span,
.bl-ch-post__link:focus-visible .bl-ch-post__cta span,
.bl-ch-feature__link:hover .bl-ch-post__cta span,
.bl-ch-feature__link:focus-visible .bl-ch-post__cta span { transform: translateX(4px); }
.bl-ch-post__link:focus-visible,
.bl-ch-feature__link:focus-visible { outline: 2px solid var(--bl-color-brand); outline-offset: 3px; }

/* ==========================================================================
   DESTAQUE
   ========================================================================== */
.bl-ch-feature { padding-block: clamp(3rem, 6vw, 5rem) 0; scroll-margin-top: calc(var(--bl-header-height, 5rem) + 4rem); }

.bl-ch-feature__link {
	display: grid;
	justify-items: start;
	gap: 1rem;
	padding: clamp(1.75rem, 5vw, 4rem);
	border: 1px solid var(--bl-border-active);
	border-radius: var(--bl-radius-lg, 1.25rem);
	background: radial-gradient(40rem 22rem at 100% 0%, rgba(61, 191, 176, 0.12), transparent 70%), var(--bl-surface-1);
	color: inherit;
	text-decoration: none;
	transition: border-color 240ms ease;
}

.bl-ch-feature__link:hover { border-color: var(--bl-color-brand); }
.bl-ch-feature__label { padding: 0.35rem 0.7rem; border-radius: var(--bl-radius-pill, 999px); background: rgba(61, 191, 176, 0.12); font: 600 0.66rem/1 var(--bl-ch-mono); letter-spacing: 0.12em; text-transform: uppercase; color: var(--bl-color-brand-light); }
.bl-ch-feature__title { max-inline-size: 24ch; margin: 0; font-size: clamp(1.8rem, 1.2rem + 2.2vw, 3rem); font-weight: 600; line-height: 1.1; letter-spacing: -0.035em; text-wrap: balance; color: var(--bl-text-primary); }
.bl-ch-feature__excerpt { max-inline-size: 60ch; font-size: 1.05rem; line-height: 1.6; color: var(--bl-text-secondary); }
.bl-ch-feature__cta { margin-block-start: 0.5rem; font-size: 1rem; }

/* ==========================================================================
   TEMAS (cabeçalho à esquerda, dois artigos à direita)
   ========================================================================== */
.bl-ch-front { padding-block: clamp(3rem, 6vw, 4.5rem); scroll-margin-top: calc(var(--bl-header-height, 5rem) + 3.5rem); }
.bl-ch-front + .bl-ch-front { border-block-start: 1px solid var(--bl-border); }
.bl-ch-feature + .bl-ch-front { padding-block-start: clamp(4rem, 8vw, 6rem); }

.bl-ch-front__grid { display: grid; gap: 1.75rem; }

@media (min-width: 1024px) {
	.bl-ch-front__grid { grid-template-columns: minmax(0, 0.8fr) minmax(0, 2fr); gap: clamp(2.5rem, 5vw, 5rem); align-items: start; }
	.bl-ch-front__head { position: sticky; inset-block-start: calc(var(--bl-header-compact-height, 4.5rem) + 5rem); }
}

.bl-ch-front__head { display: grid; justify-items: start; gap: 0.65rem; }
.bl-ch-front__front { margin: 0; font: 500 0.7rem/1 var(--bl-ch-mono); letter-spacing: 0.14em; text-transform: uppercase; color: var(--bl-color-brand-light); }
.bl-ch-front__title { margin: 0; font-size: clamp(1.75rem, 1.4rem + 1.4vw, 2.5rem); font-weight: 600; line-height: 1.1; letter-spacing: -0.03em; }
.bl-ch-front__summary { max-inline-size: 38ch; margin: 0; font-size: 0.98rem; line-height: 1.55; color: var(--bl-text-secondary); }

.bl-ch-front__solution {
	display: inline-flex;
	align-items: center;
	gap: 0.4rem;
	min-block-size: 2.75rem;
	font-size: 0.9rem;
	font-weight: 600;
	color: var(--bl-text-primary) !important;
	text-decoration: none;
}

.bl-ch-front__solution span { color: var(--bl-color-brand-light); transition: transform 220ms ease; }
.bl-ch-front__solution:hover { color: var(--bl-color-brand-light) !important; }
.bl-ch-front__solution:hover span { transform: translateX(3px); }
.bl-ch-front__solution:focus-visible { outline: 2px solid var(--bl-color-brand); outline-offset: 3px; }

.bl-ch-front__posts { display: grid; gap: 1rem; }

@media (min-width: 720px) {
	.bl-ch-front__posts { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1.25rem; }
}

/* `.bl-scope a` (global.css) pinta todo link com a cor da marca; os links do hub
   definem a própria cor no mesmo nível de especificidade. */
.bl-ch .bl-ch-index__item,
.bl-ch .bl-ch-post__link,
.bl-ch .bl-ch-feature__link { color: var(--bl-text-primary); }
.bl-ch .bl-ch-topics__item { color: var(--bl-text-secondary); }
.bl-ch .bl-ch-topics__item:hover { color: var(--bl-text-primary); }
.bl-ch .bl-ch-topics__item.is-active { color: var(--bl-bg-deep); }

/* ==========================================================================
   CARDS COM CAPA (template single: relacionados)
   ========================================================================== */
.bl-ch-card__link {
	display: grid;
	block-size: 100%;
	color: inherit;
	text-decoration: none;
	outline: none;
}

.bl-ch-card__cover {
	position: relative;
	display: block;
	overflow: hidden;
	border: 1px solid var(--bl-border);
	border-radius: var(--bl-radius-md);
	aspect-ratio: 16 / 10;
	transition: border-color 260ms ease;
}

.bl-ch-card__body { display: grid; align-content: start; gap: 0.7rem; padding-block-start: 1.25rem; }

.bl-ch-meta { display: flex; flex-wrap: wrap; align-items: center; gap: 0.5rem; margin: 0; font: 500 0.7rem/1.4 var(--bl-ch-mono); letter-spacing: 0.06em; text-transform: uppercase; color: var(--bl-text-muted); }
.bl-ch-meta__topic { color: var(--bl-color-brand-light); }

.bl-ch-card__title { margin: 0; font-size: clamp(1.3rem, 1.05rem + 0.9vw, 1.75rem); font-weight: 600; line-height: 1.2; letter-spacing: -0.02em; text-wrap: balance; color: var(--bl-text-primary); }
.bl-ch-card--side .bl-ch-card__title { font-size: clamp(1.15rem, 1rem + 0.5vw, 1.4rem); }
.bl-ch-card__excerpt { display: block; max-inline-size: 60ch; font-size: 0.98rem; line-height: 1.6; color: var(--bl-text-secondary); }

.bl-ch-card__cta { display: inline-flex; align-items: center; gap: 0.45rem; margin-block-start: 0.35rem; font-size: 0.92rem; font-weight: 600; color: var(--bl-color-brand-light); }
.bl-ch-card__cta span { transition: transform 220ms ease; }

.bl-ch-card__link:hover .bl-ch-card__cover,
.bl-ch-card__link:focus-visible .bl-ch-card__cover { border-color: var(--bl-border-active); }
.bl-ch-card__link:hover .bl-ch-card__cta span,
.bl-ch-card__link:focus-visible .bl-ch-card__cta span { transform: translateX(4px); }
.bl-ch-card__link:focus-visible .bl-ch-card__title { text-decoration: underline; text-decoration-color: var(--bl-color-brand); text-underline-offset: 0.2em; }

/* ==========================================================================
   CTA FINAL
   ========================================================================== */
.bl-ch-final { padding-block: var(--bl-ch-section); border-block-start: 1px solid var(--bl-border); background: radial-gradient(40rem 20rem at 50% 100%, rgba(61, 191, 176, 0.08), transparent 70%), var(--bl-surface-1); }
.bl-ch-final__inner { display: flex; flex-direction: column; align-items: center; text-align: center; }
.bl-ch-final__inner .bl-rb-headline-h2 { max-inline-size: 20ch; }
.bl-ch-final__inner .bl-rb-lead { margin-inline: auto; max-inline-size: 52ch; }
.bl-ch-final__inner .bl-rb-actions { justify-content: center; }

@media (max-width: 767px) {
	.bl-ch, .bl-article { --bl-ch-section: 4rem; }
	.bl-ch-final__inner { align-items: flex-start; text-align: left; }
	.bl-ch-final__inner .bl-rb-lead { margin-inline: 0; }
}

/* ==========================================================================
   ARTIGO (single)
   ========================================================================== */
.bl-article { --bl-article-measure: 46rem; padding-block-end: var(--bl-ch-section); }

.bl-article__header {
	padding-block: clamp(3rem, 6vw, 5rem) clamp(2rem, 4vw, 3rem);
	border-block-end: 1px solid var(--bl-border);
	background: radial-gradient(50rem 26rem at 85% 0%, rgba(61, 191, 176, 0.06), transparent 70%), var(--bl-bg-deep);
}

.bl-article__header-grid { display: grid; gap: 2.5rem; align-items: end; }

@media (min-width: 1024px) {
	.bl-article__header-grid { grid-template-columns: minmax(0, 1.35fr) minmax(0, 0.65fr); }
}

.bl-article__crumbs { display: flex; flex-wrap: wrap; gap: 0.5rem; margin: 0 0 1.5rem; padding: 0; list-style: none; font: 500 0.72rem/1.4 var(--bl-ch-mono); letter-spacing: 0.06em; text-transform: uppercase; color: var(--bl-text-muted); }
.bl-article__crumbs a { color: var(--bl-color-brand-light); text-decoration: none; }
.bl-article__crumbs a:hover { text-decoration: underline; }
.bl-article__crumbs li + li::before { content: '/'; margin-inline-end: 0.5rem; color: var(--bl-text-muted); }

.bl-article__title { margin: 0 0 1.25rem; max-inline-size: 22ch; font-size: clamp(2.1rem, 1.3rem + 3.2vw, 3.9rem); font-weight: 600; line-height: 1.06; letter-spacing: -0.04em; text-wrap: balance; }
.bl-article__lead { max-inline-size: 58ch; margin: 0 0 1.5rem; font-size: clamp(1.08rem, 1rem + 0.35vw, 1.28rem); line-height: 1.55; color: var(--bl-text-secondary); }
.bl-article__cover { overflow: hidden; border: 1px solid var(--bl-border); border-radius: var(--bl-radius-md); aspect-ratio: 16 / 10; }

.bl-article__body {
	inline-size: min(calc(100% - 2 * var(--bl-gutter)), var(--bl-article-measure));
	margin-inline: auto;
	padding-block-start: clamp(2.5rem, 5vw, 4rem);
	font-size: clamp(1.06rem, 1rem + 0.25vw, 1.18rem);
	line-height: 1.75;
	color: #d3dcda;
}

.bl-article__body > * { margin-block: 0 1.35em; }
.bl-article__body h2 { margin-block: 2.4em 0.8em; font-size: clamp(1.5rem, 1.25rem + 1vw, 2rem); font-weight: 600; line-height: 1.2; letter-spacing: -0.025em; color: var(--bl-text-primary); scroll-margin-top: 6rem; }
.bl-article__body h3 { margin-block: 1.8em 0.6em; font-size: 1.2rem; font-weight: 600; color: var(--bl-text-primary); }
.bl-article__body strong { color: var(--bl-text-primary); font-weight: 600; }
.bl-article__body a { color: var(--bl-color-brand-light); text-decoration: underline; text-decoration-color: rgba(61, 191, 176, 0.45); text-underline-offset: 0.18em; }
.bl-article__body a:hover { text-decoration-color: currentColor; }
.bl-article__body ul,
.bl-article__body ol { padding-inline-start: 1.25em; }
.bl-article__body li { margin-block-end: 0.55em; padding-inline-start: 0.25em; }
.bl-article__body li::marker { color: var(--bl-color-brand); }
.bl-article__body blockquote {
	margin-inline: 0;
	padding: 0.25em 0 0.25em 1.25em;
	border-inline-start: 2px solid var(--bl-color-brand);
	font-size: 1.2em;
	line-height: 1.5;
	color: var(--bl-text-primary);
}
.bl-article__body blockquote p { margin: 0; }

.bl-article__challenge {
	inline-size: min(calc(100% - 2 * var(--bl-gutter)), var(--bl-article-measure));
	margin: clamp(2.5rem, 5vw, 4rem) auto 0;
	padding: clamp(1.5rem, 4vw, 2.5rem);
	border: 1px solid var(--bl-border-active);
	border-radius: var(--bl-radius-md);
	background: linear-gradient(135deg, rgba(61, 191, 176, 0.08), rgba(13, 19, 18, 0.9));
}

.bl-article__challenge h2 { margin: 0 0 0.75rem; font-size: clamp(1.4rem, 1.2rem + 0.8vw, 1.85rem); font-weight: 600; line-height: 1.2; letter-spacing: -0.02em; }
.bl-article__challenge p { margin: 0 0 1.5rem; max-inline-size: 52ch; line-height: 1.6; color: var(--bl-text-secondary); }
.bl-article__challenge .bl-rb-actions { margin-top: 0; }

.bl-article__related { margin-block-start: var(--bl-ch-section); padding-block-start: var(--bl-ch-section); border-block-start: 1px solid var(--bl-border); }
.bl-article__related-head { display: flex; flex-wrap: wrap; align-items: end; justify-content: space-between; gap: 1rem; margin-block-end: 2rem; }
.bl-article__related-head h2 { margin: 0; font-size: var(--bl-type-section-h2); font-weight: 600; letter-spacing: -0.035em; line-height: 1.1; }
.bl-article__related-head a { color: var(--bl-color-brand-light); font-weight: 600; text-decoration: none; min-block-size: 2.75rem; display: inline-flex; align-items: center; gap: 0.4rem; }
.bl-article__related-grid { display: grid; gap: 2.5rem; }

@media (min-width: 768px) { .bl-article__related-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 2rem; } }

@media (max-width: 767px) {
	.bl-article__body { inline-size: calc(100% - 2.5rem); }
	.bl-article__challenge { inline-size: calc(100% - 2.5rem); }
	.bl-article__cover { display: none; }
}

@media (prefers-reduced-motion: reduce) {
	.bl-cover__move,
	.bl-ch-card__cta span,
	.bl-ch-post__link,
	.bl-ch-post__cta span,
	.bl-ch-index__item,
	.bl-ch-index__arrow { transition: none !important; }
	a:hover .bl-cover__move,
	.bl-ch-post__link:hover { transform: none; }
}