:root {
  --bg: #0b1321;
  --surface: #18202e;
  --surface-soft: #141c2a;
  --label: #dbe2f7;
  --copy: #c1cbdb;
  --muted: #9da8ba;
  --sep: rgba(255, 255, 255, 0.1);
  --brand: #4da8ff;
  --brand-contrast: #061426;
  --accent: #ff5a1f;
  --blue-soft: #172b44;
  --blue-text: #9ecbff;
  color-scheme: dark;
}

:root[data-theme="light"] {
  --bg: #f2f2f7;
  --surface: #ffffff;
  --surface-soft: #f7f7fa;
  --label: #1c1c1e;
  --copy: #47474d;
  --muted: #6e6e73;
  --sep: #e5e5ea;
  --brand: #0b63e5;
  --brand-contrast: #ffffff;
  --blue-soft: #eaf2fe;
  --blue-text: #164f9e;
  color-scheme: light;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--label);
  font-family:
    -apple-system, BlinkMacSystemFont, "SF Pro Text", Inter, system-ui, sans-serif;
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--brand);
}

.wrap {
  width: 100%;
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 16px;
}

/* ---------- cabeçalho e rodapé ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  border-bottom: 1px solid var(--sep);
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: saturate(180%) blur(16px);
}

.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 60px;
}

.brand {
  display: flex;
}

.brand img {
  height: 28px;
  width: auto;
}

.logo-light {
  display: none;
}

:root[data-theme="light"] .logo-light {
  display: block;
}

:root[data-theme="light"] .logo-dark {
  display: none;
}

.site-header nav {
  display: flex;
  align-items: center;
  gap: 20px;
  font-size: 15px;
}

.site-header nav a:not(.button) {
  color: var(--copy);
  text-decoration: none;
}

.site-header nav a:not(.button):hover {
  color: var(--label);
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 40px;
  padding: 0 18px;
  border-radius: 999px;
  background: var(--brand);
  color: var(--brand-contrast);
  font-weight: 600;
  font-size: 15px;
  text-decoration: none;
}

.button.secondary {
  background: transparent;
  color: var(--brand);
  box-shadow: inset 0 0 0 1px var(--brand);
}

@media (max-width: 640px) {
  .site-header nav a:not(.button) {
    display: none;
  }
}

.site-footer {
  margin-top: 72px;
  padding: 40px 0 56px;
  border-top: 1px solid var(--sep);
  color: var(--muted);
  font-size: 14px;
}

.site-footer .wrap {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 32px;
}

.site-footer nav {
  display: grid;
  align-content: start;
  gap: 8px;
}

.site-footer b {
  color: var(--label);
}

.site-footer a {
  color: var(--copy);
  text-decoration: none;
}

.site-footer p {
  grid-column: 1 / -1;
  margin: 0;
}

@media (max-width: 720px) {
  .site-footer .wrap {
    grid-template-columns: 1fr;
  }
}

/* ---------- índice do blog ---------- */

.blog-header {
  max-width: 720px;
  padding: 56px 0 32px;
}

.eyebrow {
  margin: 0 0 8px;
  color: var(--accent);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

h1 {
  margin: 0 0 16px;
  font-size: clamp(32px, 5vw, 46px);
  line-height: 1.12;
  letter-spacing: -0.02em;
}

.lede {
  margin: 0;
  color: var(--copy);
  font-size: 19px;
}

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 16px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.card {
  display: grid;
  gap: 8px;
  height: 100%;
  padding: 24px;
  border: 1px solid var(--sep);
  border-radius: 18px;
  background: var(--surface);
  color: var(--copy);
  text-decoration: none;
  transition: border-color 0.15s;
}

.card:hover {
  border-color: var(--brand);
}

.card .eyebrow {
  margin: 0;
}

.card strong {
  color: var(--label);
  font-size: 20px;
  line-height: 1.3;
}

.card span:not(.eyebrow) {
  font-size: 15px;
}

.card small {
  align-self: end;
  color: var(--muted);
}

/* ---------- artigo ---------- */

.article-layout {
  max-width: 760px;
  padding-top: 32px;
}

.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  color: var(--muted);
  font-size: 14px;
}

.breadcrumbs a {
  color: var(--muted);
}

.article-header {
  padding: 24px 0 8px;
}

.meta {
  margin: 16px 0 0;
  color: var(--muted);
  font-size: 14px;
}

.summary,
.toc,
.cta,
.faq details {
  border-radius: 18px;
  background: var(--surface);
}

.summary {
  margin: 24px 0;
  padding: 20px 24px;
  border-left: 4px solid var(--accent);
}

.summary h2 {
  margin: 0 0 8px;
  font-size: 17px;
}

.summary ul {
  margin: 0;
  padding-left: 20px;
}

.toc {
  margin: 0 0 32px;
  padding: 20px 24px;
  font-size: 15px;
}

.toc ol {
  margin: 8px 0 0;
  padding-left: 20px;
}

.toc a {
  color: var(--copy);
}

.prose {
  color: var(--copy);
}

.prose h2,
.faq h2,
.related h2 {
  margin: 48px 0 12px;
  color: var(--label);
  font-size: 26px;
  line-height: 1.25;
  letter-spacing: -0.01em;
  scroll-margin-top: 80px;
}

.prose h3 {
  margin: 32px 0 8px;
  color: var(--label);
  font-size: 20px;
}

.prose strong {
  color: var(--label);
}

.prose li + li {
  margin-top: 6px;
}

.prose code {
  padding: 1px 6px;
  border-radius: 6px;
  background: var(--surface-soft);
  font-size: 0.9em;
}

.cta {
  margin: 48px 0;
  padding: 28px;
  background: var(--blue-soft);
}

.cta h2 {
  margin: 0 0 8px;
  color: var(--blue-text);
  font-size: 22px;
}

.cta p {
  margin: 0;
  color: var(--copy);
}

.cta-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 20px !important;
}

.faq details {
  margin-bottom: 8px;
  padding: 16px 20px;
}

.faq summary {
  cursor: pointer;
  color: var(--label);
  font-weight: 600;
}

.faq details p {
  margin: 12px 0 0;
  color: var(--copy);
}

.related .cards {
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
}