:root {
  --azul: #0f2a43;
  --azul-claro: #1c4569;
  --laranja: #f07f1a;
  --laranja-escuro: #d96d0a;
  --cinza-fundo: #f5f7fa;
  --texto: #24303c;
  --texto-suave: #5a6a7a;
  --branco: #ffffff;
  --borda: #e3e9ef;
  --max: 1080px;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  color: var(--texto);
  line-height: 1.65;
  background: var(--branco);
}
img { max-width: 100%; height: auto; }
a { color: var(--laranja-escuro); }
.container { max-width: var(--max); margin: 0 auto; padding: 0 20px; }

/* Header */
header {
  background: var(--azul);
  position: sticky; top: 0; z-index: 50;
  box-shadow: 0 2px 8px rgba(0,0,0,.15);
}
.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  max-width: var(--max); margin: 0 auto; padding: 14px 20px;
}
.logo { color: var(--branco); font-size: 1.5rem; font-weight: 800; text-decoration: none; letter-spacing: .5px; }
.logo-nome span { color: var(--laranja); }
nav { display: flex; gap: 4px; align-items: center; flex-wrap: wrap; }
nav a {
  color: #cdd9e4; text-decoration: none; font-size: .95rem;
  padding: 8px 12px; border-radius: 6px;
}
nav a:hover, nav a[aria-current="page"] { color: var(--branco); background: var(--azul-claro); }
nav a.cta {
  background: var(--laranja); color: var(--branco); font-weight: 700; margin-left: 8px;
}
nav a.cta:hover { background: var(--laranja-escuro); }
.menu-toggle { display: none; background: none; border: 0; color: var(--branco); font-size: 1.8rem; cursor: pointer; }

/* Hero */
.hero { background: linear-gradient(135deg, var(--azul) 0%, var(--azul-claro) 100%); color: var(--branco); padding: 72px 0; }
.hero-img {
  background:
    linear-gradient(rgba(15,42,67,.82), rgba(15,42,67,.72)),
    url('/imagens/hero-usina-asfalto.jpg') center 65% / cover no-repeat;
  padding: 96px 0;
}
.hero h1 { font-size: 2.4rem; line-height: 1.2; max-width: 720px; }
.hero p { font-size: 1.15rem; margin: 20px 0 32px; max-width: 640px; color: #dbe5ee; }
.botoes { display: flex; gap: 14px; flex-wrap: wrap; }
.btn {
  display: inline-block; padding: 14px 28px; border-radius: 8px;
  text-decoration: none; font-weight: 700; font-size: 1rem;
}
.btn-laranja { background: var(--laranja); color: var(--branco); }
.btn-laranja:hover { background: var(--laranja-escuro); }
.btn-vazado { border: 2px solid #ffffff66; color: var(--branco); }
.btn-vazado:hover { border-color: var(--branco); }

/* Seções */
section { padding: 56px 0; }
section.alt { background: var(--cinza-fundo); }
h2.secao { font-size: 1.8rem; color: var(--azul); margin-bottom: 8px; }
p.secao-sub { color: var(--texto-suave); margin-bottom: 32px; max-width: 640px; }

.grid { display: grid; gap: 20px; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.card {
  background: var(--branco); border: 1px solid var(--borda); border-radius: 12px;
  padding: 26px; display: flex; flex-direction: column;
}
.card h3 { color: var(--azul); font-size: 1.15rem; margin-bottom: 8px; }
.card p { color: var(--texto-suave); font-size: .95rem; flex: 1; }
.card a.saiba { margin-top: 14px; font-weight: 700; text-decoration: none; }
.card .icone { font-size: 1.6rem; margin-bottom: 12px; }
.card-foto { padding: 0; overflow: hidden; }
.card-foto img { width: 100%; height: 170px; object-fit: cover; display: block; }
.card-foto h3 { margin: 18px 22px 6px; }
.card-foto p { margin: 0 22px; }
.card-foto a.saiba { margin: 12px 22px 20px; }
.foto-pagina { width: 100%; border-radius: 12px; margin-bottom: 22px; }
.logo { display: flex; align-items: center; gap: 9px; }
.logo img { display: block; height: 58px; width: auto; }

/* Página interna */
.pagina-topo { background: var(--azul); color: var(--branco); padding: 44px 0; }
.pagina-topo h1 { font-size: 2rem; max-width: 760px; }
.pagina-topo p.resumo { color: #dbe5ee; margin-top: 10px; max-width: 640px; }
.conteudo { padding: 44px 0; max-width: 760px; }
.conteudo p { margin-bottom: 18px; }
.conteudo h2 { color: var(--azul); margin: 30px 0 12px; font-size: 1.45rem; }
.conteudo h3 { color: var(--azul); margin: 24px 0 10px; font-size: 1.2rem; }
.conteudo h4 { color: var(--azul); margin: 20px 0 8px; font-size: 1.05rem; }
.conteudo ul { margin: 0 0 18px 22px; }
.conteudo li { margin-bottom: 6px; }

table.specs { border-collapse: collapse; width: 100%; margin: 20px 0; }
table.specs td { border: 1px solid var(--borda); padding: 10px 14px; }
table.specs td:first-child { font-weight: 700; color: var(--azul); background: var(--cinza-fundo); width: 40%; }

/* Faixa CTA */
.faixa-cta { background: var(--laranja); padding: 44px 0; text-align: center; }
.faixa-cta h2 { color: var(--branco); font-size: 1.6rem; margin-bottom: 18px; }
.faixa-cta .btn { background: var(--azul); color: var(--branco); }
.faixa-cta .btn:hover { background: var(--azul-claro); }

/* Blog */
.post-meta { color: var(--texto-suave); font-size: .9rem; margin-bottom: 24px; }
.lista-posts .card { margin-bottom: 16px; }
.card-post { flex-direction: row; gap: 20px; align-items: flex-start; }
.card-post > img { width: 200px; height: 130px; object-fit: cover; border-radius: 8px; flex-shrink: 0; }
@media (max-width: 560px) {
  .card-post { flex-direction: column; }
  .card-post > img { width: 100%; height: 160px; }
}
.lista-posts h3 a { color: var(--azul); text-decoration: none; }
.lista-posts h3 a:hover { color: var(--laranja-escuro); }

/* Formulário */
form { display: grid; gap: 14px; max-width: 560px; }
label { font-weight: 700; color: var(--azul); font-size: .92rem; }
input, select, textarea {
  width: 100%; padding: 12px; border: 1px solid var(--borda); border-radius: 8px;
  font: inherit; margin-top: 4px;
}
textarea { min-height: 110px; }
.contato-direto { margin-top: 36px; }
.contato-direto p { margin-bottom: 10px; }

/* WhatsApp flutuante */
.zap-flutuante {
  position: fixed; bottom: 22px; right: 22px; z-index: 60;
  background: #25d366; color: var(--branco); width: 58px; height: 58px;
  border-radius: 50%; display: flex; align-items: center; justify-content: center;
  box-shadow: 0 4px 14px rgba(0,0,0,.25); text-decoration: none;
}
.zap-flutuante svg { width: 30px; height: 30px; fill: var(--branco); }

/* Rodapé */
footer { background: var(--azul); color: #b9c8d6; padding: 44px 0 28px; margin-top: 0; }
footer .grid-4 { margin-bottom: 28px; }
footer h4 { color: var(--branco); margin-bottom: 12px; font-size: 1rem; }
footer a { color: #b9c8d6; text-decoration: none; display: block; margin-bottom: 8px; font-size: .92rem; }
footer a:hover { color: var(--branco); }
footer .creditos { border-top: 1px solid #ffffff22; padding-top: 18px; font-size: .85rem; text-align: center; }

/* Responsivo */
@media (max-width: 860px) {
  .grid-3, .grid-4 { grid-template-columns: 1fr 1fr; }
  .hero h1 { font-size: 1.8rem; }
  .menu-toggle { display: block; }
  nav {
    display: none; position: absolute; top: 100%; left: 0; right: 0;
    background: var(--azul); flex-direction: column; align-items: stretch; padding: 10px 20px 20px;
  }
  nav.aberto { display: flex; }
  nav a.cta { margin-left: 0; text-align: center; }
  .header-inner { position: relative; }
}
@media (max-width: 560px) {
  .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .hero { padding: 48px 0; }
}