:root {
  --tinta: #0A3350;      /* azul-marinho do texto */
  --marca: #0C6199;      /* azul das faixas BLTECH */
  --marca-esc: #084a76;
  --ceu: #8FD0F0;        /* azul-claro do símbolo */
  --fundo: #F2F7FA;
  --papel: #FFFFFF;
  --linha: #D3E2EC;
  --suave: #4D6A80;
  --raio: 14px;
  --display: "Outfit", system-ui, sans-serif;
  --texto: "Instrument Sans", system-ui, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 80px; }
body { margin: 0; background: var(--fundo); color: var(--tinta); font: 400 1.0625rem/1.6 var(--texto); -webkit-font-smoothing: antialiased; }
img, svg { display: block; max-width: 100%; }
a { color: var(--marca); }
h1, h2, h3 { font-family: var(--display); line-height: 1.12; margin: 0 0 .5em; letter-spacing: -.01em; }
h1 { font-size: clamp(2.2rem, 5vw, 3.6rem); font-weight: 600; }
h2 { font-size: clamp(1.75rem, 3.4vw, 2.5rem); font-weight: 600; }
h3 { font-size: 1.25rem; font-weight: 600; }
p { margin: 0 0 1em; }
:focus-visible { outline: 3px solid var(--ceu); outline-offset: 3px; border-radius: 4px; }

.wrap { width: min(1120px, 100% - 32px); margin-inline: auto; }
.skip { position: absolute; left: -999px; top: 8px; background: var(--tinta); color: #fff; padding: 8px 14px; z-index: 99; }
.skip:focus { left: 8px; }

/* Topo */
.topo { position: sticky; top: 0; z-index: 20; background: rgba(242,247,250,.92); backdrop-filter: blur(10px); border-bottom: 1px solid var(--linha); }
.topo-in { display: flex; align-items: center; justify-content: space-between; height: 72px; }
.marca { display: flex; align-items: center; gap: 10px; text-decoration: none; color: var(--tinta); }
.marca-txt { display: flex; flex-direction: column; line-height: 1; }
.marca-nome { font: 300 1.6rem/1 var(--display); letter-spacing: .04em; }
.marca-slogan { font-size: .72rem; color: var(--suave); margin-top: 3px; }
.nav { display: flex; align-items: center; gap: 28px; }
.nav a { color: var(--tinta); text-decoration: none; font-weight: 500; }
.nav a:hover { color: var(--marca); }
.nav .nav-cta { background: var(--marca); color: #fff; padding: 10px 18px; border-radius: 999px; }
.nav .nav-cta:hover { background: var(--marca-esc); color: #fff; }
.menu-btn { display: none; font: 600 .95rem var(--texto); background: none; border: 1px solid var(--linha); color: var(--tinta); padding: 8px 14px; border-radius: 999px; cursor: pointer; }

/* Botões */
.btn { display: inline-block; background: var(--marca); color: #fff; font: 600 1rem var(--texto); padding: 14px 24px; border-radius: 999px; border: 0; text-decoration: none; cursor: pointer; transition: background .2s; }
.btn:hover { background: var(--marca-esc); }
.btn-sec { background: transparent; color: var(--tinta); box-shadow: inset 0 0 0 1.5px var(--tinta); }
.btn-sec:hover { background: var(--tinta); color: #fff; }

/* Hero */
.hero { padding: clamp(48px, 8vw, 96px) 0 clamp(56px, 8vw, 104px); }
.hero-in { display: grid; grid-template-columns: 1.05fr 1fr; gap: 48px; align-items: center; }
.lead { font-size: 1.2rem; color: var(--suave); max-width: 34em; }
.acoes { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
.topologia { margin: 0; }
.topologia svg { width: 100%; height: auto; overflow: visible; }
.nos circle { fill: var(--papel); stroke: var(--ceu); stroke-width: 2; }
.nos text { font: 600 13px var(--texto); fill: var(--tinta); text-anchor: middle; }
.nos .ico { fill: none; stroke: var(--marca); stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.nos .ico rect, .nos .ico circle { fill: none; stroke: var(--marca); }
.centro circle { fill: var(--tinta); }
.links path:not(.ring) { stroke-dasharray: 160; stroke-dashoffset: 160; animation: liga 1.1s ease-out forwards; }
.links path:nth-child(2) { animation-delay: .12s; }
.links path:nth-child(3) { animation-delay: .24s; }
.links path:nth-child(4) { animation-delay: .36s; }
.links path:nth-child(5) { animation-delay: .48s; }
@keyframes liga { to { stroke-dashoffset: 0; } }

/* Serviços */
.servicos { background: var(--papel); padding: clamp(56px, 8vw, 104px) 0; border-block: 1px solid var(--linha); }
.sec-intro { color: var(--suave); max-width: 36em; margin-bottom: 40px; }
.lista-serv { list-style: none; margin: 0; padding: 0; }
.lista-serv > li { display: grid; grid-template-columns: 56px 1.2fr 1fr; gap: 24px; align-items: start; padding: 28px 0; border-top: 1px solid var(--linha); }
.lista-serv > li:last-child { border-bottom: 1px solid var(--linha); }
.lista-serv p { color: var(--suave); margin: 0; max-width: 40em; }
.serv-ico { width: 56px; height: 56px; border-radius: 50%; background: var(--fundo); display: grid; place-items: center; }
.serv-ico svg { width: 30px; height: 30px; fill: none; stroke: var(--marca); stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.serv-ico .fill { fill: var(--marca); stroke: none; }
.tags { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 8px; }
.tags li { font-size: .88rem; padding: 5px 12px; border-radius: 999px; background: var(--fundo); color: var(--tinta); }

/* Como trabalhamos */
.como { padding: clamp(56px, 8vw, 104px) 0; }
.etapas { list-style: none; margin: 32px 0 0; padding: 0; display: grid; grid-template-columns: repeat(4, 1fr); gap: 32px; position: relative; }
.etapas::before { content: ""; position: absolute; top: 22px; left: 22px; right: 22px; height: 2px; background: repeating-linear-gradient(90deg, var(--ceu) 0 6px, transparent 6px 12px); }
.etapas li { position: relative; }
.etapas .n { display: grid; place-items: center; width: 46px; height: 46px; border-radius: 50%; background: var(--tinta); color: #fff; font: 600 1.1rem var(--display); margin-bottom: 18px; position: relative; }
.etapas p { color: var(--suave); margin: 0; }

/* Sobre */
.sobre { background: var(--tinta); color: #E6F1F8; padding: clamp(56px, 8vw, 104px) 0; }
.sobre h2 { color: #fff; }
.sobre-in { display: grid; grid-template-columns: 1fr 1.4fr; gap: 48px; }
.sobre p { font-size: 1.15rem; max-width: 36em; }

/* Contato */
.contato { padding: clamp(56px, 8vw, 104px) 0; }
.contato-in { display: grid; grid-template-columns: 1fr 1.1fr; gap: 56px; align-items: start; }
.contato-txt > p { color: var(--suave); }
.canais { list-style: none; padding: 0; margin: 28px 0 0; }
.canais li { padding: 14px 0; border-top: 1px solid var(--linha); display: grid; grid-template-columns: 120px 1fr; gap: 12px; }
.canais li span { color: var(--suave); font-size: .92rem; }
.form { background: var(--papel); border: 1px solid var(--linha); border-radius: var(--raio); padding: clamp(20px, 4vw, 32px); display: grid; gap: 16px; }
.form label { display: grid; gap: 6px; font-weight: 500; font-size: .95rem; }
.form input, .form select, .form textarea { font: inherit; font-weight: 400; color: var(--tinta); background: var(--fundo); border: 1px solid var(--linha); border-radius: 10px; padding: 12px 14px; width: 100%; }
.form input:focus, .form select:focus, .form textarea:focus { outline: none; border-color: var(--marca); box-shadow: 0 0 0 3px rgba(12,97,153,.18); }
.form .btn { justify-self: start; }
.hp { position: absolute; left: -9999px; }

/* Rodapé */
.rodape { border-top: 1px solid var(--linha); padding: 28px 0; font-size: .92rem; color: var(--suave); }
.rodape-in { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 12px; }
.rodape p { margin: 0; }
.rodape strong { color: var(--tinta); }

/* Página simples (obrigado / 404) */
.simples { min-height: 70vh; display: grid; place-items: center; text-align: center; padding: 64px 16px; }
.simples img { margin: 0 auto 24px; }
.simples p { color: var(--suave); max-width: 30em; margin-inline: auto; }

@media (max-width: 900px) {
  .hero-in, .sobre-in, .contato-in { grid-template-columns: 1fr; }
  .topologia { max-width: 460px; margin-inline: auto; }
  .lista-serv > li { grid-template-columns: 56px 1fr; }
  .lista-serv .tags { grid-column: 2; }
  .etapas { grid-template-columns: 1fr 1fr; }
  .etapas::before { display: none; }
}
@media (max-width: 760px) {
  .menu-btn { display: block; }
  .nav { display: none; position: absolute; top: 72px; left: 0; right: 0; flex-direction: column; align-items: stretch; gap: 0; background: var(--papel); border-bottom: 1px solid var(--linha); padding: 8px 16px 16px; }
  .nav.aberto { display: flex; }
  .nav a { padding: 12px 0; }
  .nav .nav-cta { text-align: center; margin-top: 8px; }
  .marca-slogan { display: none; }
}
@media (max-width: 520px) {
  .etapas { grid-template-columns: 1fr; }
  .lista-serv > li { grid-template-columns: 1fr; gap: 14px; }
  .lista-serv .tags { grid-column: auto; }
  .canais li { grid-template-columns: 1fr; gap: 2px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .links path:not(.ring) { animation: none; stroke-dashoffset: 0; }
  .pulsos { display: none; }
}