/* ============================================================
   RTC — Rumo Tecnológico Consultores · Dark Tech Design System
   ============================================================ */
:root {
  --bg: #070b14;
  --bg-2: #0c1220;
  --surface: rgba(255, 255, 255, 0.04);
  --surface-2: rgba(255, 255, 255, 0.07);
  --border: rgba(148, 163, 184, 0.14);
  --border-forte: rgba(148, 163, 184, 0.28);
  --texto: #e6edf7;
  --texto-2: #9aa8bd;
  --acento: #38bdf8;
  --acento-2: #818cf8;
  --acento-3: #34d399;
  --gradiente: linear-gradient(120deg, #38bdf8, #818cf8 55%, #c084fc);
  --sombra-glow: 0 0 40px rgba(56, 189, 248, 0.25);
  --radius: 16px;
  --fonte-titulo: 'Space Grotesk', system-ui, sans-serif;
  --fonte-corpo: 'Inter', system-ui, sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--fonte-corpo);
  background: var(--bg);
  color: var(--texto);
  line-height: 1.65;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* ---- Fundo decorativo ---- */
.bg-grid {
  position: fixed; inset: 0; z-index: -2; pointer-events: none;
  background-image:
    linear-gradient(rgba(148,163,184,0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(148,163,184,0.05) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse 90% 60% at 50% 0%, #000 40%, transparent 100%);
  -webkit-mask-image: radial-gradient(ellipse 90% 60% at 50% 0%, #000 40%, transparent 100%);
}
.bg-glow {
  position: fixed; z-index: -1; pointer-events: none;
  top: -220px; left: 50%; transform: translateX(-50%);
  width: 900px; height: 520px;
  background: radial-gradient(closest-side, rgba(56,189,248,0.16), rgba(129,140,248,0.08) 60%, transparent);
  filter: blur(30px);
}

/* ---- Aurora animada ---- */
.aurora { position: fixed; inset: 0; z-index: -1; overflow: hidden; pointer-events: none; }
.aurora span {
  position: absolute; border-radius: 50%; filter: blur(90px); opacity: .5;
  will-change: transform;
}
.aurora span:nth-child(1) {
  width: 620px; height: 620px; top: -180px; left: -120px;
  background: radial-gradient(circle, rgba(56,189,248,0.35), transparent 65%);
  animation: aurora-a 26s ease-in-out infinite alternate;
}
.aurora span:nth-child(2) {
  width: 540px; height: 540px; top: 20%; right: -160px;
  background: radial-gradient(circle, rgba(129,140,248,0.30), transparent 65%);
  animation: aurora-b 32s ease-in-out infinite alternate;
}
.aurora span:nth-child(3) {
  width: 460px; height: 460px; bottom: -140px; left: 30%;
  background: radial-gradient(circle, rgba(192,132,252,0.22), transparent 65%);
  animation: aurora-c 38s ease-in-out infinite alternate;
}
@keyframes aurora-a { to { transform: translate(140px, 90px) scale(1.15); } }
@keyframes aurora-b { to { transform: translate(-120px, -70px) scale(1.2); } }
@keyframes aurora-c { to { transform: translate(90px, -110px) scale(1.1); } }

/* ---- Ruído subtil ---- */
.bg-ruido {
  position: fixed; inset: 0; z-index: 0; pointer-events: none; opacity: .035;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* ---- Barra de progresso de scroll ---- */
.scroll-progresso {
  position: fixed; top: 0; left: 0; height: 2px; width: 0; z-index: 60;
  background: var(--gradiente);
  box-shadow: 0 0 12px rgba(56,189,248,0.6);
}

::selection { background: rgba(56,189,248,0.35); color: #fff; }

.container { width: min(1160px, 92%); margin-inline: auto; }

h1, h2, h3, h4 { font-family: var(--fonte-titulo); line-height: 1.15; letter-spacing: -0.02em; }
a { color: var(--acento); text-decoration: none; }
img { max-width: 100%; display: block; }

/* ---- Header / Nav ---- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(7, 11, 20, 0.72);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
}
.nav-wrap { display: flex; align-items: center; justify-content: space-between; padding: 14px 0; gap: 24px; }
.logo { display: flex; align-items: center; gap: 10px; }
.logo-img { height: 48px; width: auto; display: block; }
.footer-logo .logo-img { height: 44px; }
.nav { display: flex; align-items: center; gap: 26px; }
.nav a { color: var(--texto-2); font-size: 0.95rem; font-weight: 500; transition: color .2s; }
.nav a:hover, .nav a.ativo { color: var(--texto); }
.nav-toggle { display: none; background: none; border: 0; cursor: pointer; flex-direction: column; gap: 5px; padding: 6px; }
.nav-toggle span { width: 24px; height: 2px; background: var(--texto); border-radius: 2px; transition: .25s; }

/* ---- Botões ---- */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  background: var(--gradiente); color: #fff !important;
  font-weight: 600; font-size: 1rem;
  padding: 13px 28px; border-radius: 999px; border: 0; cursor: pointer;
  transition: transform .2s, box-shadow .2s;
}
.btn:hover { transform: translateY(-2px); box-shadow: var(--sombra-glow); }
.btn-sm { padding: 9px 20px; font-size: 0.9rem; }
.btn-ghost {
  background: transparent; color: var(--texto) !important;
  border: 1px solid var(--border-forte);
}
.btn-ghost:hover { border-color: var(--acento); box-shadow: none; }

/* ---- Hero ---- */
.hero { padding: 110px 0 90px; text-align: center; position: relative; }
#hero3d {
  position: absolute; inset: -60px 0 0 0; z-index: -1; pointer-events: none;
  mask-image: radial-gradient(ellipse 75% 70% at 50% 40%, #000 55%, transparent 100%);
  -webkit-mask-image: radial-gradient(ellipse 75% 70% at 50% 40%, #000 55%, transparent 100%);
  opacity: .55;
}
#hero3d canvas { width: 100% !important; height: 100% !important; }
.hero .badge {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 0.82rem; font-weight: 500; color: var(--acento);
  background: rgba(56,189,248,0.08); border: 1px solid rgba(56,189,248,0.25);
  padding: 6px 16px; border-radius: 999px; margin-bottom: 28px;
}
.hero .badge::before { content: ''; width: 7px; height: 7px; border-radius: 50%; background: var(--acento-3); box-shadow: 0 0 10px var(--acento-3); }
.hero h1 { font-size: clamp(2.4rem, 6vw, 4.2rem); font-weight: 700; margin-bottom: 24px; }
.hero h1 .destaque {
  background: linear-gradient(120deg, #38bdf8, #818cf8 40%, #c084fc 60%, #38bdf8);
  background-size: 220% 100%;
  -webkit-background-clip: text; background-clip: text; color: transparent;
  animation: brilho-texto 6s linear infinite;
}
@keyframes brilho-texto { to { background-position: -220% 0; } }
.hero p.lead { font-size: clamp(1.05rem, 2vw, 1.25rem); color: var(--texto-2); max-width: 640px; margin: 0 auto 40px; }
.hero-acoes { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

/* ---- Métricas ---- */
.metricas { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 1px; background: var(--border); border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; margin-top: 80px; }
.metrica { background: var(--bg-2); padding: 28px 20px; text-align: center; }
.metrica .num { font-family: var(--fonte-titulo); font-size: 2.2rem; font-weight: 700; background: var(--gradiente); -webkit-background-clip: text; background-clip: text; color: transparent; }
.metrica .rot { font-size: 0.85rem; color: var(--texto-2); margin-top: 4px; }

/* ---- Secções ---- */
.seccao { padding: 90px 0; }
.seccao-head { max-width: 620px; margin-bottom: 56px; }
.seccao-head.centro { margin-inline: auto; text-align: center; }
.kicker { font-size: 0.8rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.18em; color: var(--acento); margin-bottom: 14px; }
.seccao-head h2 { font-size: clamp(1.8rem, 4vw, 2.6rem); margin-bottom: 16px; }
.seccao-head p { color: var(--texto-2); font-size: 1.05rem; }

/* ---- Cards ---- */
.grelha { display: grid; gap: 24px; }
.grelha-2 { grid-template-columns: repeat(2, 1fr); }
@media (max-width: 700px) { .grelha-2 { grid-template-columns: 1fr; } }
.grelha-3 { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
.card {
  --mx: 50%; --my: 50%;
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 32px;
  transition: transform .25s, border-color .25s, background .25s;
  position: relative; overflow: hidden;
  backdrop-filter: blur(6px); -webkit-backdrop-filter: blur(6px);
}
.card::before {
  content: ''; position: absolute; inset: 0 0 auto 0; height: 2px;
  background: var(--gradiente); opacity: 0; transition: opacity .25s;
}
/* Spotlight que segue o cursor */
.card::after {
  content: ''; position: absolute; inset: 0; pointer-events: none;
  background: radial-gradient(420px circle at var(--mx) var(--my), rgba(56,189,248,0.10), transparent 55%);
  opacity: 0; transition: opacity .3s;
}
.card:hover { transform: translateY(-5px); border-color: var(--border-forte); background: var(--surface-2); }
.card:hover::before { opacity: 1; }
.card:hover::after { opacity: 1; }
.card > * { position: relative; z-index: 1; }
.card h3, .card h2 { font-size: 1.25rem; margin-bottom: 12px; }
.card h3 a, .card h2 a { color: var(--texto); }
.card p { color: var(--texto-2); font-size: 0.97rem; }
.card .mais { display: inline-block; margin-top: 18px; font-weight: 600; font-size: 0.92rem; }

.icone {
  width: 52px; height: 52px; border-radius: 14px; margin-bottom: 22px;
  display: flex; align-items: center; justify-content: center;
  background: linear-gradient(135deg, rgba(56,189,248,0.15), rgba(129,140,248,0.15));
  border: 1px solid rgba(56,189,248,0.3);
}
.icone svg { width: 26px; height: 26px; stroke: var(--acento); }

/* ---- Projetos ---- */
.projeto-tags { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 16px; }
.tag {
  font-size: 0.75rem; font-weight: 500; color: var(--acento);
  background: rgba(56,189,248,0.08); border: 1px solid rgba(56,189,248,0.22);
  padding: 3px 12px; border-radius: 999px;
}

/* ---- Blog ---- */
.card .data { font-size: 0.8rem; color: var(--texto-2); text-transform: uppercase; letter-spacing: 0.08em; margin-bottom: 10px; }

/* ---- Cartão de topologia 3D ---- */
.topologia-cartao {
  position: relative; height: 500px; border-radius: 24px; overflow: hidden;
  background: linear-gradient(180deg, #0b1120, #0c1220 55%, #05070d);
  border: 1px solid rgba(148,163,184,0.22);
  box-shadow: 0 24px 60px rgba(0,0,0,0.45);
}
@media (min-width: 768px) { .topologia-cartao { height: 620px; } }
#topologia3d { position: absolute; inset: 0; touch-action: pan-y; }
#topologia3d canvas { width: 100% !important; height: 100% !important; display: block; }
.topologia-fallback {
  position: absolute; inset: 0; display: flex; align-items: center; justify-content: center;
  color: var(--texto-2); font-size: 0.95rem; text-align: center; padding: 24px; z-index: 0;
}
#topologia3d:not(:empty) + .topologia-fallback { display: none; }
/* tooltip rica que segue o nó */
.topologia-tip {
  position: absolute; z-index: 3; pointer-events: none; transform: translate(-50%, -100%);
  display: flex; flex-direction: column; gap: 2px;
  padding: 8px 12px; border-radius: 12px;
  background: rgba(9,14,26,0.92); border: 1px solid rgba(148,163,184,0.28);
  box-shadow: 0 12px 30px rgba(0,0,0,0.5); backdrop-filter: blur(6px);
  white-space: nowrap;
}
.topologia-tip[hidden] { display: none; }
.topologia-tip-titulo { font-family: var(--fonte-titulo); font-weight: 600; font-size: 0.95rem; color: #f1f5f9; }
.topologia-tip-acao { font-size: 0.75rem; color: #6ee7b7; font-weight: 600; }
.topologia-dica {
  position: absolute; bottom: 16px; right: 24px; z-index: 2; pointer-events: none;
  font-size: 0.75rem; color: rgba(154,168,189,0.7);
}

/* linha de "chips" — navegação real para cada serviço + realce cruzado com o 3D */
.topologia-nos {
  display: flex; flex-wrap: wrap; justify-content: center; gap: 10px; margin-top: 22px;
}
.topo-chip {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 9px 15px; border-radius: 999px; text-decoration: none;
  font-size: 0.88rem; font-weight: 500; color: var(--texto);
  background: var(--superficie-2, rgba(148,163,184,0.08));
  border: 1px solid var(--border); transition: transform .18s, border-color .18s, box-shadow .18s, background .18s;
}
.topo-chip:hover, .topo-chip.ativo {
  transform: translateY(-2px); border-color: var(--acento, #00d4ff);
  box-shadow: 0 8px 22px rgba(0,0,0,0.25);
  background: color-mix(in srgb, var(--acento, #00d4ff) 12%, transparent);
}
.topo-chip-ic { display: inline-flex; width: 18px; height: 18px; }
.topo-chip-ic svg { width: 100%; height: 100%; }
.topo-chip-nucleo { font-weight: 700; }

/* ---- Marquee de tecnologias ---- */
.marquee {
  overflow: hidden; border-block: 1px solid var(--border); padding: 18px 0;
  mask-image: linear-gradient(90deg, transparent, #000 12%, #000 88%, transparent);
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 12%, #000 88%, transparent);
}
.marquee-faixa {
  display: flex; gap: 48px; width: max-content;
  animation: marquee 34s linear infinite;
}
.marquee-faixa span {
  display: flex; align-items: center; gap: 48px;
  font-family: var(--fonte-titulo); font-size: 0.95rem; font-weight: 500;
  color: var(--texto-2); white-space: nowrap; text-transform: uppercase; letter-spacing: 0.12em;
}
.marquee-faixa i { font-style: normal; color: var(--acento); opacity: .7; }
.marquee:hover .marquee-faixa { animation-play-state: paused; }
@keyframes marquee { to { transform: translateX(-50%); } }

/* ---- CTA com borda em gradiente rotativo ---- */
.cta {
  text-align: center; padding: 70px 40px;
  background: linear-gradient(135deg, rgba(56,189,248,0.10), rgba(129,140,248,0.10));
  border-radius: 24px;
  position: relative; overflow: hidden; isolation: isolate;
}
.cta::before {
  content: ''; position: absolute; inset: 0; z-index: -2; border-radius: 24px; padding: 1px;
  background: conic-gradient(from var(--ang, 0deg), rgba(56,189,248,0.7), rgba(129,140,248,0.2), rgba(192,132,252,0.7), rgba(56,189,248,0.2), rgba(56,189,248,0.7));
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor; mask-composite: exclude;
  animation: rodar-borda 7s linear infinite;
}
@property --ang { syntax: '<angle>'; initial-value: 0deg; inherits: false; }
@keyframes rodar-borda { to { --ang: 360deg; } }
.cta::after {
  content: ''; position: absolute; inset: 0; z-index: -3; border-radius: 24px;
  background: var(--bg-2);
}
.cta h2 { font-size: clamp(1.7rem, 3.5vw, 2.4rem); margin-bottom: 16px; }
.cta p { color: var(--texto-2); max-width: 520px; margin: 0 auto 32px; }

/* ---- Página interna / artigo ---- */
.pagina-head { padding: 80px 0 30px; }
.pagina-head h1 { font-size: clamp(2rem, 5vw, 3.2rem); margin-bottom: 18px; }
.pagina-head p.lead { color: var(--texto-2); font-size: 1.15rem; max-width: 680px; }
.conteudo { max-width: 760px; }
.conteudo h3, .conteudo h2 { font-size: 1.4rem; margin: 36px 0 14px; }
.conteudo p { margin-bottom: 18px; color: var(--texto-2); }
.conteudo ul, .conteudo ol { margin: 0 0 18px 22px; color: var(--texto-2); }
.conteudo li { margin-bottom: 8px; }
.conteudo strong { color: var(--texto); }

/* ---- Formulários ---- */
.form-grelha { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.form-grelha .full { grid-column: 1 / -1; }
label { display: block; font-size: 0.88rem; font-weight: 500; margin-bottom: 8px; color: var(--texto); }
input, textarea, select {
  width: 100%; padding: 13px 16px;
  background: var(--surface); border: 1px solid var(--border-forte);
  border-radius: 12px; color: var(--texto); font-family: inherit; font-size: 0.97rem;
  transition: border-color .2s, box-shadow .2s;
}
input:focus, textarea:focus, select:focus {
  outline: none; border-color: var(--acento);
  box-shadow: 0 0 0 3px rgba(56,189,248,0.15);
}
textarea { min-height: 150px; resize: vertical; }

.alerta { padding: 16px 20px; border-radius: 12px; margin-bottom: 24px; font-size: 0.95rem; }
.alerta-ok { background: rgba(52,211,153,0.1); border: 1px solid rgba(52,211,153,0.35); color: #6ee7b7; }
.alerta-erro { background: rgba(248,113,113,0.1); border: 1px solid rgba(248,113,113,0.35); color: #fca5a5; }

/* ---- Contactos ---- */
.contacto-grelha { display: grid; grid-template-columns: 1fr 1.4fr; gap: 48px; align-items: start; }
.contacto-info .item { display: flex; gap: 16px; margin-bottom: 26px; }
.contacto-info .item .icone { width: 44px; height: 44px; margin: 0; flex-shrink: 0; }
.contacto-info .item h4 { font-size: 1rem; margin-bottom: 2px; }
.contacto-info .item p, .contacto-info .item a { color: var(--texto-2); font-size: 0.95rem; }

/* ---- Footer ---- */
.site-footer { border-top: 1px solid var(--border); margin-top: 60px; background: var(--bg-2); }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1.2fr; gap: 40px; padding: 60px 0 40px; }
.site-footer h4 { font-size: 0.95rem; margin-bottom: 18px; }
.site-footer ul { list-style: none; }
.site-footer li { margin-bottom: 10px; font-size: 0.92rem; color: var(--texto-2); }
.site-footer li a { color: var(--texto-2); transition: color .2s; }
.site-footer li a:hover { color: var(--acento); }
.footer-desc { color: var(--texto-2); font-size: 0.92rem; margin: 16px 0 20px; max-width: 280px; }
.social { display: flex; gap: 14px; flex-wrap: wrap; }
.social a { font-size: 0.88rem; color: var(--texto-2); border: 1px solid var(--border-forte); padding: 6px 14px; border-radius: 999px; transition: .2s; }
.social a:hover { color: var(--acento); border-color: var(--acento); }
.footer-bottom { border-top: 1px solid var(--border); padding: 22px 0; font-size: 0.85rem; color: var(--texto-2); }
.footer-legal { display: flex; justify-content: space-between; align-items: center; gap: 16px; flex-wrap: wrap; }
.legal-links { display: flex; gap: 18px; flex-wrap: wrap; }
.legal-links a { color: var(--texto-2); font-size: 0.82rem; transition: color .2s; }
.legal-links a:hover { color: var(--acento); }

/* ---- Barras de competências ---- */
.competencias-lista { max-width: 720px; margin-inline: auto; display: flex; flex-direction: column; gap: 22px; }
.competencia-topo { display: flex; justify-content: space-between; font-weight: 600; font-size: 0.95rem; margin-bottom: 8px; }
.competencia-topo span:last-child { color: var(--acento); font-family: var(--fonte-titulo); }
.competencia-barra { height: 8px; border-radius: 999px; background: var(--surface-2); border: 1px solid var(--border); overflow: hidden; }
.competencia-fill {
  height: 100%; width: 0; border-radius: 999px;
  background: var(--gradiente);
  box-shadow: 0 0 12px rgba(56,189,248,0.4);
  transition: width 1.2s cubic-bezier(.25,.8,.25,1);
}
.competencia-fill.visivel { width: var(--pct); }

/* ---- FAQs ---- */
.faq-lista { max-width: 760px; margin-inline: auto; display: flex; flex-direction: column; gap: 12px; }
.faq-item {
  background: var(--surface); border: 1px solid var(--border); border-radius: 14px;
  transition: border-color .2s;
}
.faq-item[open] { border-color: rgba(56,189,248,0.4); background: var(--surface-2); }
.faq-item summary {
  cursor: pointer; padding: 18px 22px; font-weight: 600; font-size: 1rem;
  list-style: none; position: relative; padding-right: 48px;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: '+'; position: absolute; right: 22px; top: 50%; transform: translateY(-50%);
  color: var(--acento); font-size: 1.4rem; font-weight: 400; transition: transform .2s;
}
.faq-item[open] summary::after { content: '−'; }
.faq-item p { padding: 0 22px 18px; color: var(--texto-2); font-size: 0.95rem; }

/* ---- Banner de cookies ---- */
.cookie-banner {
  position: fixed; inset: auto 0 0 0; z-index: 100; padding: 20px;
  display: flex; justify-content: center;
  animation: cookie-subir .4s ease;
}
@keyframes cookie-subir { from { transform: translateY(30px); opacity: 0; } }
.cookie-caixa {
  width: min(680px, 100%);
  background: rgba(12, 18, 32, 0.97); backdrop-filter: blur(14px);
  border: 1px solid var(--border-forte); border-radius: 18px;
  padding: 26px 28px; box-shadow: 0 20px 60px rgba(0,0,0,0.5);
}
.cookie-caixa h3 { font-size: 1.05rem; margin-bottom: 8px; }
.cookie-caixa p { color: var(--texto-2); font-size: 0.9rem; margin-bottom: 14px; }
.cookie-opcoes { display: flex; flex-direction: column; gap: 8px; margin-bottom: 16px; }
.cookie-opcoes[hidden] { display: none; }
.cookie-opcoes label { display: flex; align-items: center; gap: 10px; font-size: 0.88rem; font-weight: 400; color: var(--texto); margin: 0; }
.cookie-opcoes input { width: auto; }
.cookie-acoes { display: flex; gap: 10px; flex-wrap: wrap; }

/* ---- Animações de entrada ---- */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity .6s ease, transform .6s ease; }
.reveal.visivel { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
  .aurora span, .marquee-faixa, .cta::before, .hero h1 .destaque { animation: none; }
}

/* ---- Responsivo ---- */
@media (max-width: 900px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .contacto-grelha { grid-template-columns: 1fr; }
}
@media (max-width: 760px) {
  .nav {
    position: fixed; inset: 61px 0 auto 0; z-index: 49;
    flex-direction: column; align-items: stretch; gap: 0;
    background: rgba(7,11,20,0.97); backdrop-filter: blur(14px);
    border-bottom: 1px solid var(--border);
    max-height: 0; overflow: hidden; transition: max-height .3s ease;
  }
  .nav.aberto { max-height: 420px; }
  .nav a { padding: 16px 6%; border-top: 1px solid var(--border); }
  .nav a.btn { margin: 16px 6%; justify-content: center; }
  .nav-toggle { display: flex; }
  .hero { padding: 70px 0 60px; }
  .form-grelha { grid-template-columns: 1fr; }
  .seccao { padding: 60px 0; }
}

/* ---- Breadcrumbs + meta de artigo (SEO/E-E-A-T) ---- */
.breadcrumbs { font-size: 0.82rem; color: var(--texto-2); margin-bottom: 10px; }
.breadcrumbs a { color: var(--texto-2); text-decoration: none; }
.breadcrumbs a:hover { color: var(--acento, #00d4ff); }
.breadcrumbs span { color: var(--texto); }
.artigo-meta { font-size: 0.9rem; color: var(--texto-2); margin-top: 10px; }
.artigo-meta strong { color: var(--texto); }

/* ---- Correcoes mobile: sem overflow horizontal ---- */
html { overflow-x: clip; }
.footer-grid > div { min-width: 0; }
@media (max-width: 560px) {
  .footer-grid { grid-template-columns: 1fr; gap: 30px; }
}


/* ---- Ligacoes internas contextuais (relacionados.php, 03/08/2026) ---- */
.relacionados { padding: 56px 0 8px; border-top: 1px solid rgba(255,255,255,.08); margin-top: 56px; }
.relacionados-titulo { font-size: 1.15rem; margin: 0 0 20px; letter-spacing: -.01em; }
.relacionados-lista { list-style: none; margin: 0; padding: 0; display: grid; gap: 12px; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }
.relacionados-lista a { display: block; height: 100%; padding: 14px 16px; border-radius: 12px; border: 1px solid rgba(255,255,255,.10); background: rgba(255,255,255,.02); text-decoration: none; transition: border-color .15s, background .15s, transform .15s; }
.relacionados-lista a:hover, .relacionados-lista a:focus-visible { border-color: rgba(56,189,248,.55); background: rgba(56,189,248,.06); transform: translateY(-1px); }
.relacionados-lista .rel-ancora { display: block; font-weight: 600; font-size: .95rem; color: var(--texto, #E6EDF7); }
.relacionados-lista .rel-nota { display: block; margin-top: 4px; font-size: .82rem; line-height: 1.45; color: var(--texto-2, #9AA8BD); }
@media (max-width: 640px) { .relacionados { padding-top: 40px; margin-top: 40px; } }