/* =============================================================
   ATDev Blog — blog.css
   Folha de estilos usada nos HTMLs estáticos gerados para os
   artigos do blog (public/blog/*.html). Inspirada no design
   system do site ATDev (tokens em src/index.css), mas em CSS
   tradicional para não depender do build Tailwind.
   ============================================================= */

:root {
  /* Paleta derivada do design system ATDev */
  --atdev-bg: #ffffff;
  --atdev-bg-alt: #f5f7fa;
  --atdev-fg: #1d2733;            /* hsl(215 25% 15%) */
  --atdev-fg-soft: #4d5a6b;       /* hsl(215 16% 35%) */
  --atdev-fg-muted: #6c7a89;      /* hsl(215 16% 47%) */
  --atdev-primary: #1d2733;       /* hsl(215 28% 17%) */
  --atdev-primary-soft: #2a3749;
  --atdev-accent: #2bd07a;        /* hsl(142 76% 57%) */
  --atdev-accent-soft: #e6f8ef;
  --atdev-border: #e3e8ef;        /* hsl(214 32% 91%) */
  --atdev-shadow: 0 12px 30px -16px rgba(15, 23, 42, 0.18);
  --atdev-radius: 12px;
  --atdev-radius-sm: 8px;
  --atdev-font: "Inter", "Segoe UI", system-ui, -apple-system,
               BlinkMacSystemFont, "Helvetica Neue", Arial, sans-serif;
  --atdev-font-display: "Poppins", "Inter", system-ui, sans-serif;
  --atdev-maxw: 760px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--atdev-bg);
  color: var(--atdev-fg);
  font-family: var(--atdev-font);
  font-size: 18px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: var(--atdev-primary);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s ease, color 0.2s ease;
}
a:hover { border-bottom-color: var(--atdev-accent); }

img { max-width: 100%; height: auto; border-radius: var(--atdev-radius-sm); }

code {
  background: var(--atdev-bg-alt);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.9em;
  font-family: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
}

pre {
  background: var(--atdev-primary);
  color: #f8fafc;
  padding: 18px 22px;
  border-radius: var(--atdev-radius-sm);
  overflow-x: auto;
  font-size: 0.95em;
  line-height: 1.55;
}
pre code { background: transparent; padding: 0; color: inherit; }

/* ---------- Layout helpers ---------- */
.wrap {
  width: 100%;
  max-width: var(--atdev-maxw);
  margin: 0 auto;
  padding: 0 22px;
}

/* ---------- Header / Footer ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: saturate(180%) blur(12px);
  -webkit-backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--atdev-border);
}
.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}
.site-header .brand {
  font-family: var(--atdev-font-display);
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--atdev-primary);
  border-bottom: none;
  letter-spacing: 0.02em;
}
.site-header .brand span { color: var(--atdev-accent); }
.site-header nav a {
  margin-left: 22px;
  font-weight: 500;
  font-size: 0.95rem;
  color: var(--atdev-fg-soft);
}
.site-header nav a:hover { color: var(--atdev-primary); }

.site-footer {
  margin-top: 80px;
  /* Fundo fixo escuro para garantir contraste com o texto branco
     independentemente do tema (claro/escuro) do sistema. */
  background: #1d2733;
  color: rgba(255, 255, 255, 0.82);
  padding: 48px 0 24px;
  font-size: 0.95rem;
}
.site-footer__grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 32px;
  padding-bottom: 28px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}
.site-footer h4 {
  color: #fff;
  font-family: var(--atdev-font-display);
  margin: 0 0 12px;
  font-size: 1rem;
  letter-spacing: 0.02em;
}
.site-footer a { color: rgba(255, 255, 255, 0.78); border-bottom: none; }
.site-footer a:hover { color: var(--atdev-accent); }
.site-footer__bottom {
  padding-top: 18px;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
  color: rgba(255, 255, 255, 0.55);
  font-size: 0.85rem;
}

/* ---------- Breadcrumb ---------- */
.post-breadcrumb {
  font-size: 0.9rem;
  color: var(--atdev-fg-muted);
  padding-top: 28px;
}
.post-breadcrumb a { color: var(--atdev-fg-soft); border-bottom: none; }
.post-breadcrumb a:hover { color: var(--atdev-primary); }
.post-breadcrumb__sep { margin: 0 8px; opacity: 0.6; }

/* ---------- Article header ---------- */
.post-header { padding: 22px 0 14px; }
.post-header__category {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--atdev-primary);
  background: var(--atdev-accent-soft);
  padding: 6px 12px;
  border-radius: 999px;
  margin-bottom: 18px;
}
.post-header h1 {
  font-family: var(--atdev-font-display);
  font-size: clamp(2rem, 4vw, 2.75rem);
  line-height: 1.2;
  color: var(--atdev-primary);
  margin: 0 0 18px;
  letter-spacing: -0.01em;
}
.post-header__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  color: var(--atdev-fg-muted);
  font-size: 0.92rem;
  align-items: center;
}
.post-header__meta span { display: inline-flex; align-items: center; gap: 6px; }
.post-header__meta svg { width: 16px; height: 16px; opacity: 0.7; }

/* ---------- Capa ---------- */
.post-cover {
  margin: 26px 0 36px;
  border-radius: var(--atdev-radius);
  overflow: hidden;
  box-shadow: var(--atdev-shadow);
}
.post-cover img { display: block; width: 100%; }

/* ---------- Corpo do artigo ---------- */
.post-body { padding: 8px 0 24px; }
.post-body h2 {
  font-family: var(--atdev-font-display);
  font-size: 1.6rem;
  color: var(--atdev-primary);
  margin: 42px 0 14px;
  letter-spacing: -0.005em;
}
.post-body h3 {
  font-family: var(--atdev-font-display);
  font-size: 1.25rem;
  color: var(--atdev-primary);
  margin: 32px 0 12px;
}
.post-body p { margin: 0 0 18px; }
.post-body ul, .post-body ol { padding-left: 22px; margin: 0 0 20px; }
.post-body li { margin: 6px 0; }
.post-body blockquote {
  border-left: 4px solid var(--atdev-accent);
  background: var(--atdev-bg-alt);
  margin: 24px 0;
  padding: 14px 20px;
  color: var(--atdev-fg-soft);
  border-radius: 0 var(--atdev-radius-sm) var(--atdev-radius-sm) 0;
  font-style: italic;
}
.post-body hr {
  border: none;
  border-top: 1px solid var(--atdev-border);
  margin: 36px 0;
}

/* ---------- CTA ---------- */
.post-cta {
  margin: 48px 0 0;
  /* Fundo fixo escuro para garantir contraste com o texto branco
     independentemente do tema (claro/escuro) do sistema. */
  background: #1d2733;
  color: #fff;
  border-radius: var(--atdev-radius);
  padding: 36px 32px;
  text-align: center;
  box-shadow: var(--atdev-shadow);
}
.post-cta h2 {
  font-family: var(--atdev-font-display);
  margin: 0 0 10px;
  font-size: 1.5rem;
  color: #fff;
}
.post-cta p { margin: 0 0 22px; color: rgba(255, 255, 255, 0.85); }
.post-cta__actions {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}
.post-cta .btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 22px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.95rem;
  border-bottom: none;
  transition: transform 0.15s ease, background 0.2s ease, color 0.2s ease;
}
.post-cta .btn--primary {
  background: var(--atdev-accent);
  color: var(--atdev-primary);
}
.post-cta .btn--primary:hover { transform: translateY(-1px); }
.post-cta .btn--outline {
  background: transparent;
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.4);
}
.post-cta .btn--outline:hover { border-color: var(--atdev-accent); color: var(--atdev-accent); }

/* ---------- Responsivo ---------- */
@media (max-width: 720px) {
  body { font-size: 17px; }
  .site-header__inner { height: 64px; }
  .site-header nav a { margin-left: 14px; font-size: 0.88rem; }
  .site-footer__grid { grid-template-columns: 1fr; }
  .post-body h2 { font-size: 1.4rem; }
  .post-cta { padding: 28px 22px; }
}

@media (prefers-color-scheme: dark) {
  :root {
    --atdev-bg: #131a23;
    --atdev-bg-alt: #1c2532;
    --atdev-fg: #f1f5f9;
    --atdev-fg-soft: #cbd5e1;
    --atdev-fg-muted: #94a3b8;
    --atdev-primary: #f8fafc;
    --atdev-primary-soft: #cbd5e1;
    --atdev-accent: #2bd07a;
    --atdev-accent-soft: rgba(43, 208, 122, 0.12);
    --atdev-border: #25303f;
    --atdev-shadow: 0 14px 36px -18px rgba(0, 0, 0, 0.55);
  }
  .site-header { background: rgba(15, 21, 30, 0.92); }
  .site-header .brand { color: var(--atdev-primary); }
  pre { background: #0a0f17; }
}