:root {
  --bg: #f5f8f7;
  --bg-2: #eef3f1;
  --card: #ffffff;
  --line: #dde6e3;
  --text: #0d1716;
  --muted: #5a6b68;
  --prose: #23302e;
  --green: #0c9a62;
  --green-2: #087a4d;
  --green-glow: rgba(12, 154, 98, 0.16);
  --btn-text: #ffffff;
  --header-bg: rgba(245, 248, 247, 0.85);
  --grid-opacity: 0.6;
  --warn: #c98a00;
  --warn-bg: rgba(201, 138, 0, 0.08);
  --radius: 16px;
  --max: 1120px;
  --read: 720px;
  --font-head: 'Space Grotesk', system-ui, sans-serif;
  --font-body: 'Inter', system-ui, sans-serif;
  color-scheme: light;
}
:root[data-theme="dark"] {
  --bg: #06090a;
  --bg-2: #0b1112;
  --card: #0e1617;
  --line: #1a2628;
  --text: #e7efed;
  --muted: #8fa3a0;
  --prose: #d3dedb;
  --green: #2ee59d;
  --green-2: #17b978;
  --green-glow: rgba(46, 229, 157, 0.18);
  --btn-text: #032015;
  --header-bg: rgba(6, 9, 10, 0.78);
  --grid-opacity: 0.45;
  --warn: #f5c451;
  --warn-bg: rgba(245, 196, 81, 0.06);
  color-scheme: dark;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
/* grade tecnológica de fundo */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  z-index: -1;
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse at 50% 0%, #000 0%, transparent 70%);
  opacity: var(--grid-opacity);
}
a { color: var(--green); text-decoration: none; }
a:hover { text-decoration: underline; }
img { max-width: 100%; height: auto; }
h1, h2, h3, h4 { font-family: var(--font-head); line-height: 1.2; letter-spacing: -0.02em; }

.wrap { max-width: var(--max); margin: 0 auto; padding: 0 16px; }
.read { max-width: var(--read); margin: 0 auto; padding: 0 16px; }

/* ---------- header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: blur(12px);
  background: var(--header-bg);
  border-bottom: 1px solid var(--line);
}
.site-header .wrap { display: flex; align-items: center; justify-content: space-between; height: 64px; gap: 16px; }
.logo { display: flex; align-items: center; gap: 10px; font-family: var(--font-head); font-weight: 700; font-size: 20px; color: var(--text); letter-spacing: 0.06em; }
.logo:hover { text-decoration: none; }
.logo-dot { width: 10px; height: 10px; border-radius: 50%; background: var(--green); box-shadow: 0 0 0 0 var(--green-glow); animation: pulse 2.4s infinite; }
.logo small { font-weight: 500; color: var(--muted); letter-spacing: 0; font-size: 14px; }
.nav { display: flex; gap: 20px; font-size: 15px; }
.nav a { color: var(--muted); }
.nav a:hover { color: var(--text); text-decoration: none; }
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  background: var(--green); color: var(--btn-text); font-weight: 700;
  padding: 12px 20px; border-radius: 999px; font-family: var(--font-head);
  transition: transform .2s ease, box-shadow .2s ease;
}
.btn:hover { text-decoration: none; transform: translateY(-2px); box-shadow: 0 10px 30px var(--green-glow); }
.btn-sm { padding: 8px 14px; font-size: 14px; }
@media (max-width: 760px) { .nav { display: none; } }

@keyframes pulse {
  0% { box-shadow: 0 0 0 0 var(--green-glow); }
  70% { box-shadow: 0 0 0 10px rgba(46,229,157,0); }
  100% { box-shadow: 0 0 0 0 rgba(46,229,157,0); }
}

/* ---------- reveal ao rolar ---------- */
.reveal { opacity: 0; transform: translateY(18px); transition: opacity .6s ease, transform .6s ease; }
.reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  .logo-dot { animation: none; }
}

/* ---------- hero ---------- */
.hero { padding-top: 72px; padding-bottom: 40px; }
.eyebrow { display: inline-flex; align-items: center; gap: 8px; font-size: 13px; letter-spacing: .14em; text-transform: uppercase; color: var(--green); font-family: var(--font-head); }
.hero h1 { font-size: clamp(34px, 6vw, 60px); margin: 14px 0 16px; max-width: 820px; }
.hero h1 span { color: var(--green); }
.hero p { color: var(--muted); font-size: 19px; max-width: 640px; margin: 0 0 28px; }

/* ---------- chips de categoria ---------- */
.chips { display: flex; flex-wrap: wrap; gap: 10px; margin: 8px 0 40px; }
.chip { border: 1px solid var(--line); background: var(--bg-2); color: var(--text); padding: 8px 14px; border-radius: 999px; font-size: 14px; transition: border-color .2s, color .2s; }
.chip:hover { border-color: var(--green); color: var(--green); text-decoration: none; }

/* ---------- cards ---------- */
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 20px; padding-bottom: 64px; }
.card {
  position: relative; display: flex; flex-direction: column; gap: 10px;
  background: linear-gradient(180deg, var(--card), var(--bg-2));
  border: 1px solid var(--line); border-radius: var(--radius); padding: 24px;
  color: var(--text); overflow: hidden;
  transition: transform .25s ease, border-color .25s ease;
}
.card::after {
  content: ''; position: absolute; inset: -1px; border-radius: inherit; pointer-events: none;
  background: radial-gradient(400px circle at var(--mx, 50%) var(--my, 0%), var(--green-glow), transparent 40%);
  opacity: 0; transition: opacity .3s;
}
.card:hover { transform: translateY(-4px); border-color: color-mix(in srgb, var(--green) 45%, transparent); text-decoration: none; }
.card:hover::after { opacity: 1; }
.card h2, .card h3 { margin: 0; font-size: 21px; }
.card p { margin: 0; color: var(--muted); font-size: 15px; }
.meta { font-size: 13px; color: var(--muted); display: flex; gap: 10px; flex-wrap: wrap; align-items: center; }
.tag { color: var(--green); font-family: var(--font-head); font-size: 12px; letter-spacing: .1em; text-transform: uppercase; }
.card-featured { grid-column: 1 / -1; padding: 36px; }
.card-featured h2 { font-size: clamp(24px, 3.4vw, 34px); }

/* ---------- artigo ---------- */
.progress { position: fixed; top: 0; left: 0; height: 3px; width: 0; background: var(--green); z-index: 60; box-shadow: 0 0 12px var(--green); }
.post-head { padding-top: 56px; padding-bottom: 24px; }
.post-head h1 { font-size: clamp(30px, 5vw, 46px); margin: 12px 0 14px; }
.post-head .lead { color: var(--muted); font-size: 19px; margin: 0 0 18px; }
.breadcrumbs { font-size: 14px; color: var(--muted); }
.breadcrumbs a { color: var(--muted); }
.disclaimer-top { font-size: 14px; color: var(--muted); border-left: 3px solid var(--warn); padding: 10px 14px; background: var(--warn-bg); border-radius: 0 10px 10px 0; margin: 0 0 32px; }

.prose h2 { font-size: 28px; margin: 48px 0 12px; scroll-margin-top: 80px; }
.prose h3 { font-size: 21px; margin: 32px 0 8px; }
.prose p, .prose li { color: var(--prose); }
.prose strong { color: var(--text); }
.prose ul, .prose ol { padding-left: 22px; }
.prose li { margin: 6px 0; }
.prose blockquote { margin: 28px 0; padding: 18px 22px; border: 1px solid var(--line); border-left: 3px solid var(--green); background: var(--bg-2); border-radius: 0 12px 12px 0; }
.prose blockquote p { margin: 0; }
.prose table { width: 100%; border-collapse: collapse; margin: 24px 0; font-size: 15px; display: block; overflow-x: auto; }
.prose th, .prose td { border: 1px solid var(--line); padding: 10px 12px; text-align: left; }
.prose th { background: var(--bg-2); font-family: var(--font-head); }

.toc { border: 1px solid var(--line); border-radius: var(--radius); padding: 18px 22px; background: var(--bg-2); margin: 0 0 32px; }
.toc summary { cursor: pointer; font-family: var(--font-head); font-weight: 600; }
.toc ol { margin: 12px 0 0; padding-left: 20px; }
.toc a { color: var(--muted); }

/* ---------- CTA ---------- */
.cta {
  position: relative; overflow: hidden;
  margin: 44px 0; padding: 30px; border-radius: 20px;
  border: 1px solid color-mix(in srgb, var(--green) 40%, transparent);
  background: radial-gradient(circle at 100% 0%, var(--green-glow), transparent 55%), var(--card);
}
.cta h3 { margin: 0 0 8px; font-size: 24px; }
.cta p { margin: 0 0 18px; color: var(--muted) !important; }
.cta .scan { position: absolute; left: 0; right: 0; height: 60px; top: -60px; background: linear-gradient(transparent, var(--green-glow), transparent); animation: scan 4s linear infinite; pointer-events: none; }
@keyframes scan { to { top: 110%; } }
.cta-fine { font-size: 12px !important; margin: 12px 0 0 !important; }

/* ---------- FAQ / fontes / autor ---------- */
.faq details { border-bottom: 1px solid var(--line); padding: 14px 0; }
.faq summary { cursor: pointer; font-weight: 600; font-family: var(--font-head); }
.faq details p { margin: 10px 0 0; }
.sources { font-size: 14px; color: var(--muted); }
.sources li { color: var(--muted); }
.author-box { display: flex; gap: 16px; align-items: flex-start; border: 1px solid var(--line); border-radius: var(--radius); padding: 20px; margin: 40px 0; background: var(--bg-2); }
.avatar { flex: 0 0 48px; height: 48px; border-radius: 50%; display: grid; place-items: center; background: var(--green-glow); color: var(--green); font-family: var(--font-head); font-weight: 700; }
.author-box p { margin: 4px 0 0; font-size: 14px; color: var(--muted); }

.ad-slot { margin: 36px 0; min-height: 120px; }
.ad-label { font-size: 11px; color: var(--muted); text-transform: uppercase; letter-spacing: .1em; }

.draft-bar { background: var(--warn); color: #261c00; text-align: center; padding: 10px 16px; font-weight: 700; font-size: 14px; }

/* ---------- footer ---------- */
.site-footer { border-top: 1px solid var(--line); padding: 40px 0; margin-top: 40px; font-size: 14px; color: var(--muted); }
.site-footer .cols { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 24px; }
.site-footer nav { display: flex; flex-wrap: wrap; gap: 16px; }
.site-footer a { color: var(--muted); }
.site-footer .legal { margin-top: 24px; font-size: 13px; max-width: 760px; }

.page { padding-top: 56px; padding-bottom: 24px; }
.page h1 { font-size: clamp(30px, 5vw, 44px); }


/* ---------- tema ---------- */
.head-actions { display: flex; align-items: center; gap: 10px; }
.theme-toggle { width: 40px; height: 40px; border-radius: 50%; border: 1px solid var(--line); background: var(--card); color: var(--text); display: grid; place-items: center; cursor: pointer; transition: border-color .2s, transform .2s; }
.theme-toggle:hover { border-color: var(--green); transform: rotate(-12deg); }
.theme-toggle svg { width: 18px; height: 18px; }
.theme-toggle .moon { display: block; }
.theme-toggle .sun { display: none; }
:root[data-theme="dark"] .theme-toggle .moon { display: none; }
:root[data-theme="dark"] .theme-toggle .sun { display: block; }

/* ---------- imagens ---------- */
.card-img { margin: -24px -24px 6px; aspect-ratio: 16 / 9; overflow: hidden; background: var(--bg-2); }
.card-featured .card-img { margin: -36px -36px 10px; }
.card-img img, .card-img svg { width: 100%; height: 100%; object-fit: cover; display: block; transition: transform .5s ease; }
.card:hover .card-img img, .card:hover .card-img svg { transform: scale(1.04); }
.post-hero { margin: 0 0 28px; border-radius: var(--radius); overflow: hidden; border: 1px solid var(--line); aspect-ratio: 16 / 9; background: var(--bg-2); }
.post-hero img, .post-hero svg { width: 100%; height: 100%; object-fit: cover; display: block; }
.post-hero-cap { font-size: 12px; color: var(--muted); margin: -20px 0 28px; }

/* ---------- diagramas ---------- */
.figure { margin: 32px 0; padding: 20px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--card); }
.figure svg { width: 100%; height: auto; display: block; }
.figure figcaption { font-size: 14px; color: var(--muted); margin-top: 12px; text-align: center; }
.d-stroke { stroke: var(--text); fill: none; }
.d-muted-s { stroke: var(--muted); fill: none; }
.d-line { stroke: var(--line); fill: none; }
.d-accent { fill: var(--green); }
.d-accent-s { stroke: var(--green); fill: none; }
.d-soft { fill: var(--green-glow); }
.d-panel { fill: var(--bg-2); stroke: var(--line); }
.d-warn { fill: var(--warn); }
.d-warn-s { stroke: var(--warn); fill: none; }
.d-text { fill: var(--text); font-family: var(--font-body); }
.d-muted { fill: var(--muted); font-family: var(--font-body); }
.d-btn-text { fill: var(--btn-text); font-family: var(--font-head); }