/* KnowledgeBasePro · Article Reader V2.4.2
   Leitura técnica integrada ao design system principal. */

.article-read-progress {
  position: fixed;
  inset: 0 0 auto 0;
  height: 3px;
  z-index: 1100;
  pointer-events: none;
  background: transparent;
}
.article-read-progress > span {
  display: block;
  width: 0;
  height: 100%;
  background: linear-gradient(90deg, var(--kb-accent), color-mix(in srgb, var(--kb-accent) 55%, #6aa9ff));
  box-shadow: 0 0 14px color-mix(in srgb, var(--kb-accent) 32%, transparent);
  transition: width 90ms linear;
}

.article-reader {
  --article-measure: 76ch;
  --article-ink: var(--kb-text);
  --article-muted: var(--kb-muted);
  --article-rule: var(--kb-line);
  --article-code: #11151b;
  --article-code-ink: #dce6f4;
  width: 100%;
  font-family: var(--kb-font);
}

.article-reader__hero {
  position: relative;
  max-width: 1160px;
  margin: 0 auto clamp(42px, 6vw, 72px);
  padding: clamp(20px, 3vw, 36px) clamp(2px, 1vw, 10px) clamp(30px, 4vw, 46px);
  border-bottom: 1px solid var(--kb-line);
}
.article-reader__hero::before {
  content: "";
  position: absolute;
  width: 280px;
  height: 280px;
  right: 2%;
  top: -90px;
  border-radius: 50%;
  pointer-events: none;
  background: radial-gradient(circle, color-mix(in srgb, var(--kb-accent) 10%, transparent), transparent 68%);
}
.article-breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: clamp(24px, 4vw, 38px);
  color: var(--kb-faint);
  font-size: .72rem;
  font-weight: 650;
}
.article-breadcrumb a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--kb-muted);
  text-decoration: none;
}
.article-breadcrumb a:hover { color: var(--kb-text); }
.article-breadcrumb > i { font-size: .6rem; }

.article-reader__heading {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 34px;
  align-items: end;
}
.article-reader__heading-main { max-width: 930px; min-width: 0; }
.article-kicker {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 9px;
  margin-bottom: 16px;
  color: var(--kb-muted);
  font-size: .72rem;
  font-weight: 650;
}
.article-category {
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  padding: 5px 9px;
  border: 1px solid color-mix(in srgb, var(--kb-accent) 22%, var(--kb-line));
  border-radius: 999px;
  color: var(--kb-accent-dark);
  background: var(--kb-accent-soft);
  font-weight: 750;
}
.article-meta-dot { width: 4px; height: 4px; border-radius: 50%; background: var(--kb-line-strong); }
.article-reader__heading h1 {
  max-width: 1020px;
  margin: 0;
  font: 800 clamp(2.45rem, 5vw, 5.15rem)/.99 var(--kb-font);
  letter-spacing: -.058em;
  text-wrap: balance;
  overflow-wrap: anywhere;
  color: var(--kb-text);
}
.article-meta-row {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px 18px;
  margin-top: 24px;
  color: var(--kb-muted);
  font-size: .75rem;
}
.article-meta-row > span { display: inline-flex; align-items: center; gap: 6px; min-width: 0; }
.article-meta-row strong { color: var(--kb-text); font-weight: 700; }
.article-meta-keywords { max-width: 420px; overflow: hidden; white-space: nowrap; text-overflow: ellipsis; }

.article-reader__actions { display: flex; align-items: center; flex-wrap: wrap; justify-content: flex-end; gap: 8px; }
.article-action {
  min-height: 40px;
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 8px 12px;
  border-radius: 11px;
  text-decoration: none;
  font-size: .76rem;
  font-weight: 720;
  transition: transform var(--dur-1), border-color var(--dur-1), background var(--dur-1), color var(--dur-1);
}
.article-action:hover { transform: translateY(-1px); }
.article-action--quiet { border: 1px solid var(--kb-line); color: var(--kb-muted); background: var(--kb-surface); }
.article-action--quiet:hover { color: var(--kb-text); border-color: var(--kb-line-strong); }
.article-action--primary { border: 1px solid transparent; color: #fff; background: var(--grad-brand); box-shadow: 0 6px 18px color-mix(in srgb, var(--kb-accent) 18%, transparent); }

.article-reader__layout {
  width: min(1240px, 100%);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 220px minmax(0, 780px) 220px;
  gap: clamp(26px, 3vw, 42px);
  align-items: start;
  justify-content: center;
}
.article-reader__toc,
.article-reader__rail { position: sticky; top: 104px; min-width: 0; }
.article-toc-card,
.article-side-card {
  border: 1px solid var(--kb-line);
  border-radius: 15px;
  background: color-mix(in srgb, var(--kb-surface) 93%, transparent);
  box-shadow: 0 8px 24px rgba(20, 23, 28, .035);
}
.article-toc-card { padding: 14px 12px; }
.article-rail-label {
  display: flex;
  align-items: center;
  gap: 7px;
  margin: 2px 4px 11px;
  color: var(--kb-faint);
  font-size: .64rem;
  font-weight: 800;
  letter-spacing: .1em;
  text-transform: uppercase;
}
.article-toc { display: grid; max-height: min(58vh, 560px); overflow: auto; padding-right: 2px; scrollbar-width: thin; }
.article-toc__empty { padding: 8px 5px; color: var(--kb-faint); font-size: .7rem; line-height: 1.55; }
.article-toc a,
.article-mobile-toc nav a {
  position: relative;
  display: block;
  padding: 6px 8px 6px 11px;
  border-left: 2px solid transparent;
  color: var(--kb-muted);
  text-decoration: none;
  font-size: .71rem;
  line-height: 1.45;
  border-radius: 0 8px 8px 0;
  transition: all var(--dur-1);
}
.article-toc a[data-level="3"], .article-mobile-toc nav a[data-level="3"] { padding-left: 20px; font-size: .68rem; }
.article-toc a[data-level="4"], .article-mobile-toc nav a[data-level="4"] { padding-left: 30px; font-size: .66rem; }
.article-toc a:hover { color: var(--kb-text); background: var(--kb-surface-soft); }
.article-toc a.is-active {
  color: var(--kb-text);
  border-left-color: var(--kb-accent);
  background: var(--kb-accent-soft);
  font-weight: 700;
}
.article-toc-progress {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-top: 12px;
  padding: 10px 5px 2px;
  border-top: 1px solid var(--kb-line);
  color: var(--kb-faint);
  font-size: .64rem;
}
.article-toc-progress strong { color: var(--kb-text); font-family: var(--kb-mono); font-size: .66rem; }
.article-mobile-toc { display: none; }

.article-reader__main { min-width: 0; }
.article-markdown {
  width: 100%;
  color: var(--article-ink);
  font-family: var(--kb-font);
  font-size: clamp(1.02rem, 1vw + .77rem, 1.12rem);
  line-height: 1.82;
  letter-spacing: -.006em;
  overflow-wrap: anywhere;
}
.article-markdown > :first-child { margin-top: 0 !important; }
.article-markdown > :last-child { margin-bottom: 0 !important; }
.article-markdown p { margin: 0 0 1.35em; color: color-mix(in srgb, var(--kb-text) 88%, var(--kb-muted)); }
.article-markdown strong { color: var(--kb-text); font-weight: 760; }
.article-markdown em { color: color-mix(in srgb, var(--kb-text) 80%, var(--kb-muted)); }
.article-markdown hr { margin: 3.2rem 0; border: 0; border-top: 1px solid var(--kb-line); opacity: 1; }

.article-markdown h1,
.article-markdown h2,
.article-markdown h3,
.article-markdown h4,
.article-markdown h5,
.article-markdown h6 {
  position: relative;
  scroll-margin-top: 118px;
  color: var(--kb-text);
  font-family: var(--kb-font);
  font-weight: 790;
  letter-spacing: -.04em;
  text-wrap: balance;
}
.article-markdown h1 { margin: 3.35rem 0 1rem; font-size: clamp(2rem, 3vw, 2.75rem); line-height: 1.08; }
.article-markdown h2 { margin: 3.55rem 0 1rem; padding-top: .15rem; font-size: clamp(1.65rem, 2.4vw, 2.15rem); line-height: 1.12; }
.article-markdown h2::before {
  content: "";
  display: block;
  width: 34px;
  height: 3px;
  margin-bottom: 14px;
  border-radius: 99px;
  background: var(--kb-accent);
}
.article-markdown h3 { margin: 2.7rem 0 .8rem; font-size: clamp(1.3rem, 1.8vw, 1.58rem); line-height: 1.18; }
.article-markdown h4 { margin: 2.15rem 0 .7rem; font-size: 1.13rem; line-height: 1.25; }
.article-markdown h5,
.article-markdown h6 { margin: 1.8rem 0 .65rem; font-size: .98rem; line-height: 1.3; }
.article-heading-anchor {
  position: absolute;
  left: -1.1em;
  top: .06em;
  opacity: 0;
  color: var(--kb-accent);
  text-decoration: none;
  font-size: .72em;
  transition: opacity var(--dur-1);
}
.article-markdown :is(h1,h2,h3,h4):hover .article-heading-anchor,
.article-heading-anchor:focus { opacity: 1; }

.article-markdown a {
  color: var(--kb-accent-dark);
  text-decoration-line: underline;
  text-decoration-thickness: .08em;
  text-underline-offset: .16em;
  text-decoration-color: color-mix(in srgb, var(--kb-accent) 38%, transparent);
  font-weight: 620;
}
.article-markdown a:hover { color: var(--kb-accent); text-decoration-color: currentColor; }
.article-external-mark { display: inline-block; margin-left: .2em; font-size: .68em; vertical-align: .16em; opacity: .66; }

.article-markdown ul,
.article-markdown ol { margin: 0 0 1.45em; padding-left: 1.45em; }
.article-markdown li { margin: .42em 0; padding-left: .16em; }
.article-markdown li::marker { color: var(--kb-accent); font-weight: 700; }
.article-markdown li > ul,
.article-markdown li > ol { margin-top: .42em; margin-bottom: .2em; }

.article-markdown blockquote {
  margin: 2rem 0;
  padding: 1.05rem 1.2rem 1.05rem 1.35rem;
  border: 1px solid color-mix(in srgb, var(--kb-accent) 18%, var(--kb-line));
  border-left: 3px solid var(--kb-accent);
  border-radius: 0 13px 13px 0;
  background: color-mix(in srgb, var(--kb-accent-soft) 48%, var(--kb-surface));
  color: var(--kb-muted);
}
.article-markdown blockquote > :last-child { margin-bottom: 0; }

/* Markdown extra: admonitions */
.article-markdown .admonition {
  margin: 2rem 0;
  padding: 1rem 1.15rem;
  border: 1px solid var(--kb-line);
  border-radius: 13px;
  background: var(--kb-surface);
  box-shadow: var(--kb-shadow-sm);
}
.article-markdown .admonition-title { margin: 0 0 .55rem; color: var(--kb-text); font-weight: 800; }
.article-markdown .admonition-title::before { content: "●"; margin-right: .5rem; color: var(--kb-accent); }

/* Código inline */
.article-markdown :not(pre) > code {
  padding: .18em .42em;
  border: 1px solid color-mix(in srgb, var(--kb-line) 85%, transparent);
  border-radius: 6px;
  background: color-mix(in srgb, var(--kb-surface-soft) 88%, var(--kb-surface));
  color: color-mix(in srgb, var(--kb-accent-dark) 78%, var(--kb-text));
  font: 560 .87em/1.45 var(--kb-mono);
  overflow-wrap: anywhere;
}

/* Código fenced / Pygments */
.article-code-frame {
  position: relative;
  margin: 2rem 0;
  overflow: hidden;
  border: 1px solid #252c35;
  border-radius: 15px;
  background: var(--article-code);
  box-shadow: 0 16px 38px rgba(12, 15, 20, .12);
}
.article-code-head {
  min-height: 42px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 7px 8px 7px 13px;
  border-bottom: 1px solid #252c35;
  background: #151a21;
}
.article-code-language { color: #8190a3; font: 650 .66rem/1 var(--kb-mono); text-transform: uppercase; letter-spacing: .07em; }
.article-code-copy {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-height: 28px;
  padding: 5px 8px;
  border: 1px solid #303a47;
  border-radius: 8px;
  background: #1a2028;
  color: #aeb9c8;
  font: 650 .66rem/1 var(--kb-font);
  cursor: pointer;
}
.article-code-copy:hover { color: #fff; border-color: #465467; }
.article-code-frame pre,
.article-markdown .codehilite pre {
  margin: 0;
  padding: 1.2rem 1.25rem 1.35rem;
  overflow: auto;
  border: 0;
  border-radius: 0;
  background: transparent;
  color: var(--article-code-ink);
  tab-size: 4;
  white-space: pre;
}
.article-code-frame pre code,
.article-markdown .codehilite code {
  display: block;
  min-width: max-content;
  padding: 0;
  border: 0;
  background: transparent;
  color: inherit;
  font: 500 .82rem/1.72 var(--kb-mono);
  overflow-wrap: normal;
}
.article-markdown .codehilite { margin: 0; background: transparent; }
/* Pygments — paleta discreta e legível */
.article-code-frame .hll { background: #29313c; }
.article-code-frame .c, .article-code-frame .c1, .article-code-frame .cm, .article-code-frame .cs { color: #748397; font-style: italic; }
.article-code-frame .k, .article-code-frame .kc, .article-code-frame .kd, .article-code-frame .kn, .article-code-frame .kp, .article-code-frame .kr, .article-code-frame .kt { color: #c8a7ff; }
.article-code-frame .s, .article-code-frame .s1, .article-code-frame .s2, .article-code-frame .sa, .article-code-frame .sb, .article-code-frame .sc, .article-code-frame .sd, .article-code-frame .se, .article-code-frame .sh, .article-code-frame .si, .article-code-frame .sr, .article-code-frame .ss, .article-code-frame .sx { color: #9ed6a7; }
.article-code-frame .m, .article-code-frame .mi, .article-code-frame .mf, .article-code-frame .mh, .article-code-frame .mo, .article-code-frame .il { color: #f0bd7a; }
.article-code-frame .nf, .article-code-frame .fm { color: #8fc7ff; }
.article-code-frame .nc, .article-code-frame .nn { color: #7fd7d2; }
.article-code-frame .na, .article-code-frame .nb, .article-code-frame .bp { color: #86b5ef; }
.article-code-frame .o, .article-code-frame .ow { color: #c2ccd9; }
.article-code-frame .err { color: #ff8b8b; }

/* Tabelas Markdown */
.article-table-wrap {
  width: 100%;
  margin: 2rem 0;
  overflow-x: auto;
  border: 1px solid var(--kb-line);
  border-radius: 14px;
  background: var(--kb-surface);
  box-shadow: 0 8px 24px rgba(23, 26, 31, .035);
  scrollbar-width: thin;
}
.article-markdown table {
  width: 100%;
  min-width: 560px;
  margin: 0;
  border-collapse: collapse;
  font-size: .87rem;
  line-height: 1.55;
}
.article-markdown th,
.article-markdown td { padding: .78rem .9rem; border: 0; border-bottom: 1px solid var(--kb-line); vertical-align: top; text-align: left; }
.article-markdown th {
  background: var(--kb-surface-soft);
  color: var(--kb-text);
  font-weight: 760;
  font-size: .77rem;
  letter-spacing: -.005em;
}
.article-markdown tbody tr:last-child td { border-bottom: 0; }
.article-markdown tbody tr:hover td { background: color-mix(in srgb, var(--kb-accent-soft) 32%, transparent); }

/* Imagens Markdown */
.article-markdown img {
  display: block;
  max-width: 100%;
  height: auto;
  margin: 2.25rem auto;
  border: 1px solid var(--kb-line);
  border-radius: 14px;
  background: var(--kb-surface);
  box-shadow: 0 16px 42px rgba(22, 25, 30, .09);
  cursor: zoom-in;
}
.article-markdown figure { margin: 2.25rem 0; }
.article-markdown figure img { margin: 0 auto; }
.article-markdown figcaption,
.article-generated-caption { margin: .7rem auto 0; max-width: 68ch; color: var(--kb-faint); font-size: .72rem; line-height: 1.55; text-align: center; }

.article-markdown dl { margin: 1.6rem 0; }
.article-markdown dt { margin-top: 1rem; color: var(--kb-text); font-weight: 760; }
.article-markdown dd { margin-left: 1.25rem; color: var(--kb-muted); }
.article-markdown sup { font-size: .72em; }
.article-markdown .footnote { margin-top: 3rem; padding-top: 1.3rem; border-top: 1px solid var(--kb-line); color: var(--kb-muted); font-size: .82rem; }

.article-end {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 13px;
  align-items: center;
  margin-top: clamp(54px, 8vw, 86px);
  padding: 22px 0 4px;
  border-top: 1px solid var(--kb-line);
}
.article-end__mark { width: 38px; height: 38px; display: grid; place-items: center; border-radius: 12px; color: var(--kb-green); background: color-mix(in srgb, var(--kb-green) 10%, var(--kb-surface)); border: 1px solid color-mix(in srgb, var(--kb-green) 18%, var(--kb-line)); }
.article-end span, .article-end strong { display: block; }
.article-end span { color: var(--kb-faint); font-size: .65rem; font-weight: 700; text-transform: uppercase; letter-spacing: .1em; }
.article-end strong { margin-top: 3px; overflow: hidden; white-space: nowrap; text-overflow: ellipsis; color: var(--kb-text); font-size: .79rem; }
.article-end > a { width: 36px; height: 36px; display: grid; place-items: center; border: 1px solid var(--kb-line); border-radius: 10px; color: var(--kb-muted); text-decoration: none; background: var(--kb-surface); }
.article-end > a:hover { color: var(--kb-text); }

.article-reader__rail { display: grid; gap: 12px; }
.article-side-card { padding: 13px; }
.article-side-card--summary { display: grid; gap: 3px; }
.article-side-card--summary > a {
  display: grid;
  grid-template-columns: 22px minmax(0,1fr) auto;
  gap: 7px;
  align-items: center;
  padding: 8px 7px;
  border-radius: 9px;
  color: var(--kb-muted);
  text-decoration: none;
  font-size: .69rem;
  font-weight: 650;
}
.article-side-card--summary > a:hover { background: var(--kb-surface-soft); color: var(--kb-text); }
.article-side-card--summary > a > i:last-child { font-size: .65rem; color: var(--kb-faint); }
.article-related-list { display: grid; gap: 5px; }
.article-related {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 2px 8px;
  padding: 9px 7px;
  border-radius: 9px;
  color: var(--kb-text);
  text-decoration: none;
}
.article-related:hover { background: var(--kb-surface-soft); }
.article-related > span { grid-column: 1; color: var(--kb-faint); font-size: .6rem; font-weight: 700; text-transform: uppercase; letter-spacing: .07em; }
.article-related > strong { grid-column: 1; min-width: 0; color: var(--kb-text); font-size: .69rem; line-height: 1.35; font-weight: 700; }
.article-related > i { grid-column: 2; grid-row: 1 / span 2; align-self: center; color: var(--kb-faint); font-size: .66rem; }
.article-side-card--tip { display: grid; grid-template-columns: 24px 1fr; gap: 8px; color: var(--kb-muted); background: color-mix(in srgb, var(--kb-accent-soft) 32%, var(--kb-surface)); }
.article-side-card--tip > i { color: var(--kb-accent); }
.article-side-card--tip p { margin: 0; font-size: .67rem; line-height: 1.52; }
.article-side-card--tip kbd { color: var(--kb-accent-dark); background: var(--kb-surface); border: 1px solid var(--kb-line); border-radius: 5px; padding: 2px 4px; font: 600 .61rem/1 var(--kb-mono); }

/* Lightbox */
.article-image-viewer[hidden] { display: none !important; }
.article-image-viewer {
  position: fixed;
  inset: 0;
  z-index: 2000;
  display: grid;
  place-items: center;
  padding: clamp(20px, 5vw, 70px);
  background: rgba(8, 10, 13, .88);
  backdrop-filter: blur(18px);
}
.article-image-viewer__stage { max-width: min(1180px, 100%); max-height: 90vh; display: grid; justify-items: center; gap: 10px; }
.article-image-viewer__stage img { max-width: 100%; max-height: 80vh; object-fit: contain; border-radius: 12px; box-shadow: 0 30px 90px rgba(0,0,0,.42); }
.article-image-viewer__stage p { margin: 0; color: #c4ccd7; font-size: .75rem; text-align: center; }
.article-image-viewer__close { position: absolute; top: 18px; right: 18px; width: 42px; height: 42px; display: grid; place-items: center; border: 1px solid rgba(255,255,255,.18); border-radius: 12px; background: rgba(255,255,255,.08); color: #fff; }

@media (max-width: 1180px) {
  .article-reader__layout { grid-template-columns: 200px minmax(0, 780px); }
  .article-reader__rail { display: none; }
}
@media (max-width: 880px) {
  .article-reader__hero { margin-bottom: 32px; }
  .article-reader__heading { grid-template-columns: 1fr; }
  .article-reader__actions { justify-content: flex-start; }
  .article-reader__layout { display: block; max-width: 780px; }
  .article-reader__toc { display: none; }
  .article-mobile-toc {
    display: block;
    margin: 0 0 28px;
    padding: 0 13px;
    border: 1px solid var(--kb-line);
    border-radius: 13px;
    background: var(--kb-surface);
  }
  .article-mobile-toc summary { cursor: pointer; padding: 12px 0; color: var(--kb-text); font-size: .76rem; font-weight: 750; }
  .article-mobile-toc summary i { margin-right: 7px; color: var(--kb-accent); }
  .article-mobile-toc nav { display: grid; padding: 0 0 12px; }
}
@media (max-width: 620px) {
  .article-reader__hero { padding-top: 5px; }
  .article-reader__heading h1 { font-size: clamp(2.1rem, 11vw, 3rem); letter-spacing: -.05em; }
  .article-meta-row { align-items: flex-start; flex-direction: column; gap: 6px; }
  .article-meta-keywords { max-width: 100%; white-space: normal; }
  .article-reader__actions { width: 100%; }
  .article-action { flex: 1 1 auto; justify-content: center; }
  .article-markdown { font-size: 1rem; line-height: 1.76; }
  .article-markdown h2 { margin-top: 3rem; }
  .article-heading-anchor { display: none; }
  .article-code-frame { margin-inline: -4px; border-radius: 12px; }
  .article-code-frame pre { padding-inline: 1rem; }
  .article-table-wrap { border-radius: 11px; }
}
@media print {
  .article-read-progress, .article-reader__toc, .article-reader__rail, .article-reader__actions,
  .article-mobile-toc, .article-heading-anchor, .article-code-copy, .article-image-viewer { display: none !important; }
  .article-reader__layout { display: block; max-width: 100%; }
  .article-reader__hero { max-width: 100%; }
  .article-markdown { font-size: 11pt; }
  .article-code-frame, .article-table-wrap, .article-markdown img { break-inside: avoid; }
}