:root {
  --bg: #fafaf7;
  --surface: #ffffff;
  --text: #1a1a1a;
  --text-soft: #555;
  --border: #e5e5e0;
  --accent: #0b6b5c;
  --accent-soft: #e6f2ef;
  --shadow: 0 1px 3px rgba(0,0,0,.06), 0 8px 24px rgba(0,0,0,.04);
  --radius: 12px;
  --max: 780px;
}

[data-theme="dark"] {
  --bg: #0f1115;
  --surface: #171a20;
  --text: #eaeaea;
  --text-soft: #a0a4ad;
  --border: #262a33;
  --accent: #4dc5a8;
  --accent-soft: #1c2a28;
  --shadow: 0 1px 3px rgba(0,0,0,.4), 0 8px 24px rgba(0,0,0,.3);
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

.container { max-width: 1080px; margin: 0 auto; padding: 0 20px; }

/* Progress bar */
.progress-bar {
  position: fixed; top: 0; left: 0; height: 3px;
  background: var(--accent); width: 0; z-index: 100;
  transition: width .1s linear;
}

/* Header */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  height: 64px; gap: 20px;
}
.logo {
  font-weight: 800; font-size: 1.05rem; color: var(--text);
  text-decoration: none; letter-spacing: -.02em;
}
.logo span { color: var(--accent); }
.site-header nav { display: flex; gap: 22px; }
.site-header nav a {
  color: var(--text-soft); text-decoration: none;
  font-size: .92rem; font-weight: 500;
  transition: color .2s;
}
.site-header nav a:hover { color: var(--accent); }
#theme-toggle {
  background: none; border: 1px solid var(--border);
  border-radius: 8px; padding: 6px 10px;
  cursor: pointer; font-size: 1rem;
  color: var(--text);
}

/* Hero */
.hero { padding: 72px 0 40px; text-align: center; }
.hero h1 {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  line-height: 1.2; letter-spacing: -.03em;
  max-width: 720px; margin: 0 auto 16px;
}
.hero p {
  font-size: 1.1rem; color: var(--text-soft);
  max-width: 560px; margin: 0 auto;
}

/* Section titles */
.section-title {
  font-size: 1.3rem; margin: 56px 0 24px;
  letter-spacing: -.02em;
}

/* Post grid */
.post-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 20px;
}
.post-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 26px;
  transition: transform .2s, box-shadow .2s, border-color .2s;
}
.post-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow);
  border-color: color-mix(in srgb, var(--accent) 40%, var(--border));
}
.post-tag {
  display: inline-block;
  font-size: .72rem; font-weight: 700;
  text-transform: uppercase; letter-spacing: .06em;
  color: var(--accent); background: var(--accent-soft);
  padding: 4px 10px; border-radius: 99px;
  margin-bottom: 14px;
}
.post-card h3 {
  font-size: 1.15rem; line-height: 1.35;
  margin-bottom: 10px; letter-spacing: -.01em;
}
.post-card h3 a { color: var(--text); text-decoration: none; }
.post-card h3 a:hover { color: var(--accent); }
.post-card p { color: var(--text-soft); font-size: .95rem; margin-bottom: 16px; }
.post-meta { font-size: .82rem; color: var(--text-soft); }
.post-card.soon { opacity: .72; }

/* Capas */
.post-card img, .post-cover {
  display: block; width: 100%; height: auto;
  border-radius: var(--radius);
  border: 1px solid var(--border);
}
.post-card img { margin-bottom: 18px; aspect-ratio: 1200 / 630; object-fit: cover; }
.post-cover { margin-bottom: 32px; }
.hero-logo, .logo-img { vertical-align: middle; }
.logo-img { width: 26px; height: 26px; margin-right: 8px; }

/* Figuras dentro do artigo */
.post figure {
  margin: 32px 0;
}
.post figure img {
  display: block; width: 100%; height: auto;
  border-radius: var(--radius);
  border: 1px solid var(--border);
}
.post figcaption {
  margin-top: 10px;
  font-size: .84rem; color: var(--text-soft);
  text-align: center; line-height: 1.5;
}

/* About */
.about { padding-bottom: 60px; }
.about p { color: var(--text-soft); max-width: 640px; }

/* Post page */
.post { padding: 40px 0 60px; }
.post-container { max-width: var(--max); }
.breadcrumb {
  font-size: .85rem; color: var(--text-soft);
  margin-bottom: 24px;
}
.breadcrumb a { color: var(--text-soft); text-decoration: none; }
.breadcrumb a:hover { color: var(--accent); }
.post-header h1 {
  font-size: clamp(1.7rem, 3.6vw, 2.5rem);
  line-height: 1.18; letter-spacing: -.03em;
  margin: 10px 0 18px;
}
.lead {
  font-size: 1.15rem; color: var(--text-soft);
  margin-bottom: 18px;
}
.post-header .post-meta { margin-bottom: 36px; }

/* TOC */
.toc {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px 26px;
  margin-bottom: 40px;
}
.toc strong { display: block; margin-bottom: 12px; font-size: .95rem; }
.toc ol { padding-left: 20px; }
.toc li { margin: 6px 0; font-size: .95rem; }
.toc a { color: var(--text-soft); text-decoration: none; }
.toc a:hover { color: var(--accent); }

/* Post body */
.post h2 {
  font-size: 1.5rem; margin: 44px 0 16px;
  letter-spacing: -.02em;
  scroll-margin-top: 90px;
}
.post h3 {
  font-size: 1.15rem; margin: 28px 0 12px;
  color: var(--text);
}
.post p { margin-bottom: 16px; }
.post ul, .post ol { margin: 0 0 16px 22px; }
.post li { margin: 8px 0; }
.post strong { color: var(--text); }

/* Table */
.data-table {
  width: 100%; border-collapse: collapse;
  margin: 20px 0 26px; font-size: .93rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}
.data-table th, .data-table td {
  padding: 12px 14px; text-align: left;
  border-bottom: 1px solid var(--border);
}
.data-table th {
  background: var(--accent-soft);
  font-weight: 700; color: var(--accent);
  font-size: .85rem; text-transform: uppercase; letter-spacing: .04em;
}
.data-table tr:last-child td { border-bottom: none; }

/* CTA & nav */
.post-cta {
  background: var(--accent-soft);
  border-left: 4px solid var(--accent);
  padding: 20px 24px; border-radius: var(--radius);
  margin: 40px 0;
}
.post-cta p { margin: 0; }
.post-nav {
  border-top: 1px solid var(--border);
  padding-top: 24px; margin-top: 40px;
}
.post-nav a {
  color: var(--accent); text-decoration: none;
  font-weight: 600; font-size: .95rem;
}
.post-nav a:hover { text-decoration: underline; }

/* Footer */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 32px 0;
  margin-top: 60px;
  text-align: center;
  color: var(--text-soft);
  font-size: .88rem;
}

/* Responsive */
@media (max-width: 640px) {
  .header-inner { height: 56px; }
  .site-header nav { display: none; }
  .hero { padding: 48px 0 24px; }
  .data-table { font-size: .85rem; }
  .data-table th, .data-table td { padding: 9px 10px; }
}