/* AgentSmith — tema editorial, claro/escuro, sem dependências externas */

:root {
  --bg: #fbfaf8;
  --bg-soft: #f4f2ed;
  --fg: #191a1c;
  --fg-muted: #67696e;
  --border: #e5e2db;
  --accent: #0f7a52;
  --accent-soft: rgba(15, 122, 82, 0.09);
  --code-bg: #f4f2ed;
  --serif: "Iowan Old Style", "Palatino Linotype", Palatino, "Book Antiqua", Georgia, serif;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --mono: "JetBrains Mono", "Cascadia Code", ui-monospace, Consolas, "SF Mono", Menlo, monospace;
  --measure: 44rem;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0e100f;
    --bg-soft: #16191a;
    --fg: #e7e6e2;
    --fg-muted: #97988f;
    --border: #24282a;
    --accent: #4cc38a;
    --accent-soft: rgba(76, 195, 138, 0.12);
    --code-bg: #171a19;
  }
}

:root[data-theme="dark"] {
  --bg: #0e100f;
  --bg-soft: #16191a;
  --fg: #e7e6e2;
  --fg-muted: #97988f;
  --border: #24282a;
  --accent: #4cc38a;
  --accent-soft: rgba(76, 195, 138, 0.12);
  --code-bg: #171a19;
}

*, *::before, *::after { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.65;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

.wrap { max-width: var(--measure); margin: 0 auto; padding: 0 1.25rem; width: 100%; }

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 3px; }

.mono, time, .post-meta { font-family: var(--mono); font-size: 0.78rem; letter-spacing: -0.01em; }

.skip {
  position: absolute; left: -9999px; top: 0; background: var(--accent); color: #fff;
  padding: 0.5rem 0.9rem; z-index: 10;
}
.skip:focus { left: 0.5rem; top: 0.5rem; }

/* ------------------------------------------------------------------ header */
.site-head {
  border-bottom: 1px solid var(--border);
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: saturate(160%) blur(8px);
  position: sticky; top: 0; z-index: 5;
}
.head-row {
  display: flex; align-items: center; justify-content: space-between;
  gap: 1rem; min-height: 60px; flex-wrap: wrap;
}
.brand { display: inline-flex; align-items: baseline; gap: 0.5rem; color: var(--fg); }
.brand:hover { text-decoration: none; }
.brand-mark { font-family: var(--mono); color: var(--accent); font-size: 1rem; }
.brand-name { font-family: var(--mono); font-weight: 600; letter-spacing: -0.02em; font-size: 1.02rem; }
.site-nav { display: flex; align-items: center; gap: 1.1rem; }
.site-nav a { color: var(--fg-muted); font-size: 0.85rem; }
.site-nav a:hover { color: var(--accent); }
.theme-toggle {
  background: none; border: 1px solid var(--border); color: var(--fg-muted);
  border-radius: 999px; width: 1.9rem; height: 1.9rem; cursor: pointer;
  line-height: 1; font-size: 0.85rem; padding: 0;
}
.theme-toggle:hover { color: var(--accent); border-color: var(--accent); }

/* -------------------------------------------------------------------- main */
main { padding: 2.75rem 1.25rem 4rem; }

.intro h1 {
  font-family: var(--serif); font-weight: 500; letter-spacing: -0.02em;
  font-size: clamp(1.7rem, 4vw, 2.4rem); line-height: 1.2; margin: 0 0 0.75rem;
}
.lede { color: var(--fg-muted); font-size: 1.05rem; margin: 0 0 2.5rem; max-width: 38rem; }
.kicker { color: var(--accent); text-transform: uppercase; letter-spacing: 0.09em; margin-bottom: 0.5rem; }

.section-title {
  font-family: var(--mono); font-size: 0.8rem; text-transform: uppercase;
  letter-spacing: 0.1em; color: var(--fg-muted); font-weight: 500;
  border-bottom: 1px solid var(--border); padding-bottom: 0.5rem; margin: 2.5rem 0 0.25rem;
}
.section-title .count { color: var(--accent); margin-left: 0.5rem; }

/* ------------------------------------------------------------- featured post */
.featured { border: 1px solid var(--border); border-radius: 10px; padding: 1.4rem 1.5rem; background: var(--bg-soft); }
.featured-title { font-family: var(--serif); font-size: clamp(1.35rem, 3vw, 1.75rem); font-weight: 500; margin: 0 0 0.6rem; letter-spacing: -0.015em; line-height: 1.25; }
.featured-title a { color: var(--fg); }
.featured-summary { margin: 0 0 0.85rem; color: var(--fg-muted); }
.more { font-size: 0.9rem; }

/* --------------------------------------------------------------- lista posts */
.posts { list-style: none; margin: 0; padding: 0; }
.post-item + .post-item { border-top: 1px solid var(--border); }
.post-link { display: flex; flex-direction: column; gap: 0.3rem; padding: 1.15rem 0; color: inherit; }
.post-link:hover { text-decoration: none; }
.post-link:hover .post-title { color: var(--accent); }
.post-title { font-family: var(--serif); font-size: 1.16rem; font-weight: 500; letter-spacing: -0.01em; line-height: 1.35; }
.post-summary { color: var(--fg-muted); font-size: 0.95rem; }
.post-meta { color: var(--fg-muted); }
.posts.compact .post-summary { display: none; }
.empty { color: var(--fg-muted); font-style: italic; }

/* ------------------------------------------------------------------- artigo */
.post-head { margin-bottom: 2rem; }
.post-head h1 {
  font-family: var(--serif); font-weight: 500; letter-spacing: -0.022em;
  font-size: clamp(1.75rem, 4.4vw, 2.45rem); line-height: 1.18; margin: 0 0 0.9rem;
}
.tags { margin: 0.7rem 0 0; display: flex; flex-wrap: wrap; gap: 0.4rem; }
.tag {
  font-family: var(--mono); font-size: 0.72rem; background: var(--accent-soft);
  color: var(--accent); border-radius: 999px; padding: 0.15rem 0.55rem;
}
.tag:hover { text-decoration: none; filter: brightness(1.08); }

.prose { font-family: var(--serif); font-size: 1.09rem; line-height: 1.72; }
.prose > * + * { margin-top: 1.15em; }
.prose h2 {
  font-family: var(--sans); font-size: 1.28rem; letter-spacing: -0.015em;
  margin: 2.4em 0 0.6em; padding-bottom: 0.25em; border-bottom: 1px solid var(--border);
}
.prose h3 { font-family: var(--sans); font-size: 1.07rem; letter-spacing: -0.01em; margin: 2em 0 0.5em; }
.prose ul, .prose ol { padding-left: 1.3em; }
.prose li + li { margin-top: 0.35em; }
.prose blockquote {
  margin: 1.6em 0; padding: 0.2em 1.1em; border-left: 2px solid var(--accent);
  color: var(--fg-muted); font-style: italic;
}
.prose img { max-width: 100%; height: auto; border-radius: 8px; display: block; }
.prose hr { border: 0; border-top: 1px solid var(--border); margin: 2.4em 0; }
.prose code {
  font-family: var(--mono); font-size: 0.86em; background: var(--code-bg);
  border: 1px solid var(--border); border-radius: 4px; padding: 0.08em 0.35em;
}
.prose pre {
  background: var(--code-bg); border: 1px solid var(--border); border-radius: 8px;
  padding: 1rem 1.1rem; overflow-x: auto; font-size: 0.86rem; line-height: 1.55;
}
.prose pre code { background: none; border: 0; padding: 0; font-size: inherit; }
.prose table { border-collapse: collapse; width: 100%; font-family: var(--sans); font-size: 0.92rem; }
.prose th, .prose td { border: 1px solid var(--border); padding: 0.5rem 0.7rem; text-align: left; }
.prose th { background: var(--bg-soft); font-weight: 600; }
.prose a { text-decoration: underline; text-decoration-color: color-mix(in srgb, var(--accent) 40%, transparent); }
.prose a:hover { text-decoration-color: var(--accent); }

/* ------------------------------------------------------------------- fontes */
.sources {
  margin-top: 3rem; padding-top: 1.2rem; border-top: 1px solid var(--border);
  font-size: 0.9rem; color: var(--fg-muted);
}
.sources h2 { font-family: var(--mono); font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.09em; margin: 0 0 0.5rem; }
.sources ol { padding-left: 1.2em; margin: 0; }
.sources li { margin-bottom: 0.3rem; }

/* -------------------------------------------------------------- post nav */
.post-nav {
  display: flex; justify-content: space-between; gap: 1rem; margin-top: 2.5rem;
  padding-top: 1.2rem; border-top: 1px solid var(--border); font-size: 0.92rem;
}
.post-nav a { display: flex; flex-direction: column; gap: 0.15rem; max-width: 48%; color: var(--fg); }
.post-nav a:hover { text-decoration: none; color: var(--accent); }
.post-nav .next { text-align: right; }
.post-nav .mono { color: var(--fg-muted); font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.08em; }

/* ------------------------------------------------------------------- footer */
.site-foot { border-top: 1px solid var(--border); margin-top: 3rem; padding: 1.6rem 0 2.5rem; color: var(--fg-muted); font-size: 0.85rem; }
.foot-row { display: flex; justify-content: space-between; gap: 1rem; flex-wrap: wrap; }
.foot-row p { margin: 0; }

@media (max-width: 560px) {
  body { font-size: 16px; }
  main { padding-top: 2rem; }
  .post-nav { flex-direction: column; }
  .post-nav a { max-width: 100%; text-align: left; }
}

/* -------------------------------------------------------- índice do artigo */
.wrap-wide { max-width: 74rem; }
.post-layout { display: block; }

.toc { font-family: var(--sans); font-size: 0.88rem; }
.toc-title {
  font-family: var(--mono); font-size: 0.72rem; text-transform: uppercase;
  letter-spacing: 0.09em; color: var(--fg-muted); margin: 0 0 0.6rem;
}
.toc-list { list-style: none; margin: 0; padding: 0; }
.toc-list a {
  display: block; color: var(--fg-muted); line-height: 1.35;
  padding: 0.18rem 0 0.18rem 0.7rem; border-left: 2px solid var(--border);
}
.toc-list a:hover { color: var(--accent); border-left-color: var(--accent); text-decoration: none; }
.toc-list a.is-active { color: var(--accent); border-left-color: var(--accent); font-weight: 600; }
.toc-sub { list-style: none; margin: 0.15rem 0 0.5rem; padding: 0; }
.toc-sub a { padding-left: 1.5rem; font-size: 0.83rem; }

/* mobile (e qualquer ecrã estreito): índice colapsável no topo do artigo */
.toc-mobile {
  border: 1px solid var(--border); border-radius: 10px; background: var(--bg-soft);
  margin: 0 0 2rem; padding: 0;
}
.toc-mobile > summary {
  cursor: pointer; padding: 0.7rem 0.95rem; display: flex; flex-wrap: wrap;
  gap: 0.5rem; align-items: baseline; list-style: none;
}
.toc-mobile > summary::-webkit-details-marker { display: none; }
.toc-mobile > summary::after { content: "▾"; margin-left: auto; color: var(--fg-muted); }
.toc-mobile[open] > summary::after { content: "▴"; }
.toc-mobile[open] > summary { border-bottom: 1px solid var(--border); }
.toc-mobile > summary .mono { text-transform: uppercase; letter-spacing: 0.06em; font-size: 0.74rem; }
.toc-hint { color: var(--fg-muted); font-size: 0.72rem; }
.toc-mobile .toc-list { padding: 0.6rem 0.95rem 0.95rem; }

@media (min-width: 62rem) {
  .toc-mobile { display: none; }
  .post-layout {
    display: grid; grid-template-columns: minmax(0, 44rem) 16rem;
    gap: 3.5rem; justify-content: center; align-items: start;
  }
  .toc-desktop {
    position: sticky; top: 5.25rem; max-height: calc(100vh - 7rem);
    overflow-y: auto; padding-right: 0.25rem;
  }
}

/* as âncoras não podem ficar escondidas debaixo do cabeçalho fixo */
.prose :is(h2, h3) { scroll-margin-top: 5rem; }

@media print {
  .site-head, .site-foot, .post-nav, .theme-toggle, .toc { display: none; }
  body { background: #fff; color: #000; }
}