/* BuildLab — estilos
   Direção: instrumento de laboratório em tema escuro. Fundo azul-marinho profundo,
   azul de sinal como cor de ação e âmbar só para marcações. */

:root {
  color-scheme: dark;
  --bg: #0a1424;
  --bg-2: #0f1c31;
  --fg: #eaf0f8;
  --muted: #9fb0c6;
  --line: #1f3350;
  --rule: #3d5273;
  --signal: #2b3bff;
  /* botões principais (padrão: azul bebê opaco) */
  --btn-bg: #ffb000;
  --btn-fg: #0a1424;
  --btn-hover-bg: #ffc43d;
  --btn-hover-fg: #0a1424;
  --btn-edge: #ffb000;
  /* cores lidas pelos canvas (R, G, B) */
  --accent-rgb: 142, 154, 255;
  --highlight-rgb: 255, 176, 0;
  --signal-text: #8e9aff;
  --amber: #ffb000;

  --font-display: "Bricolage Grotesque", "Segoe UI", system-ui, sans-serif;
  --font-body: "Instrument Sans", "Segoe UI", system-ui, sans-serif;

  --max: 1180px;
  --gutter: clamp(20px, 4vw, 40px);
  --radius: 10px;
}

/* Paleta "royal": azuis profundos + cáqui. Ativada por <html data-palette="royal">.
   Para voltar ao visual anterior, remova esse atributo do <html> em index.html. */
:root[data-palette="royal"] {
  --bg: #010440;
  --bg-2: #020659;
  --fg: #ecebe0;
  --muted: #8c8b79;
  --line: #020873;
  --rule: #030ba6;
  --signal: #030ba6;
  --signal-text: #8c8b79;
  --amber: #ecebe0;
  --btn-bg: #030ba6;
  --btn-fg: #ecebe0;
  --btn-edge: #8c8b79;
  --btn-hover-bg: #8c8b79;
  --btn-hover-fg: #010440;
  --accent-rgb: 140, 139, 121;
  --highlight-rgb: 236, 235, 224;
}

*,
*::before,
*::after { box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: 84px; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-body);
  font-size: 1.0625rem;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }
img, canvas { display: block; max-width: 100%; }

:focus-visible {
  outline: 3px solid var(--signal-text);
  outline-offset: 3px;
  border-radius: 4px;
}

.skip {
  position: absolute; left: 16px; top: -60px; z-index: 100;
  background: var(--fg); color: var(--bg);
  padding: 10px 16px; border-radius: 8px;
}
.skip:focus { top: 12px; }

.wrap { width: min(100% - var(--gutter) * 2, var(--max)); margin-inline: auto; }

h1, h2, h3 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.02em;
  margin: 0;
}

/* ---------- Navegação ---------- */
.nav {
  position: sticky; top: 0; z-index: 50;
  /* --nav-p vai de 0 a 1 conforme a rolagem (definido em js/main.js): a barra ganha corpo aos poucos */
  background: color-mix(in srgb, var(--bg) calc(var(--nav-p, 0) * 94%), transparent);
  -webkit-backdrop-filter: blur(calc(var(--nav-p, 0) * 14px)); backdrop-filter: blur(calc(var(--nav-p, 0) * 14px));
  border-bottom: 1px solid color-mix(in srgb, var(--rule) calc(var(--nav-p, 0) * 100%), transparent);
  box-shadow: 0 10px 30px -18px rgba(0, 0, 0, calc(var(--nav-p, 0) * .7));
}
.nav__inner {
  display: flex; align-items: center; justify-content: space-between;
  height: 68px; gap: 20px;
}
.brand { display: flex; align-items: center; white-space: nowrap; flex: none; font-family: var(--font-display); font-weight: 800; font-size: clamp(1.45rem, 2.2vw, 1.75rem); line-height: 1; letter-spacing: -0.03em; }
.brand__lab { color: var(--signal-text); }
.menu { display: flex; gap: 4px; }
.menu a { padding: 8px 14px; border-radius: 999px; font-weight: 500; font-size: 0.95rem; color: var(--muted); transition: color .2s, background .2s; }
.menu a:hover { color: var(--fg); background: var(--bg-2); }
.nav__actions { display: flex; gap: 10px; align-items: center; }

.nav__toggle {
  display: none; width: 44px; height: 44px; border: 1px solid var(--line);
  background: transparent; border-radius: 10px; cursor: pointer; color: var(--fg);
}
.nav__toggle span, .nav__toggle span::before, .nav__toggle span::after {
  display: block; width: 18px; height: 2px; background: currentColor; margin: 0 auto; position: relative; transition: transform .25s, background .25s;
}
.nav__toggle span::before, .nav__toggle span::after { content: ""; position: absolute; left: 0; }
.nav__toggle span::before { top: -6px; }
.nav__toggle span::after { top: 6px; }
.nav__toggle[aria-expanded="true"] span { background: transparent; }
.nav__toggle[aria-expanded="true"] span::before { transform: translateY(6px) rotate(45deg); }
.nav__toggle[aria-expanded="true"] span::after { transform: translateY(-6px) rotate(-45deg); }

/* ---------- Botões ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  min-height: 46px; padding: 0 22px; border-radius: 999px;
  font: 600 0.95rem/1 var(--font-body); cursor: pointer;
  border: 1.5px solid var(--rule); background: transparent; color: var(--fg);
  transition: background .2s, color .2s, transform .15s, border-color .2s;
}
.btn:hover { background: var(--fg); color: var(--bg); }
.btn:active { transform: translateY(1px); }
.btn--primary { background: var(--btn-bg); border-color: var(--btn-edge); color: var(--btn-fg); }
.btn--primary:hover { background: var(--btn-hover-bg); border-color: var(--btn-hover-bg); color: var(--btn-hover-fg); }
.btn--small { min-height: 40px; padding: 0 16px; font-size: 0.9rem; }

/* ---------- Hero ---------- */
/* O gráfico é o fundo do hero: grade, traço e barra de leitura ocupam a seção inteira */
.hero { position: relative; padding: clamp(48px, 8vw, 96px) 0 300px; border-bottom: 1px solid var(--rule); }
.hero > .wrap { position: relative; z-index: 1; }
.hero__grid { display: grid; grid-template-columns: minmax(0, 1.25fr) minmax(0, 0.75fr); gap: clamp(28px, 5vw, 72px); align-items: end; }
.hero h1 { font-size: clamp(2.6rem, 6.4vw, 5.4rem); max-width: 14ch; }
.hero__lead { margin: 0 0 26px; font-size: clamp(1.05rem, 1.5vw, 1.25rem); color: var(--muted); max-width: 46ch; }
.hero__actions { display: flex; flex-wrap: wrap; gap: 12px; }

.scope { position: absolute; inset: 0; z-index: 0; animation: fadein 1.2s ease .3s both; }
/* a grade some no alto, para não competir com o título */
.scope::before {
  content: ""; position: absolute; inset: 0;
  background:
    linear-gradient(var(--line) 1px, transparent 1px) 0 0 / 100% 40px,
    linear-gradient(90deg, var(--line) 1px, transparent 1px) 0 0 / 40px 100%;
  -webkit-mask-image: linear-gradient(to bottom, transparent 8%, #000 62%);
  mask-image: linear-gradient(to bottom, transparent 8%, #000 62%);
}
.scope canvas { position: absolute; inset: 0; width: 100%; height: 100%; }
@keyframes fadein { from { opacity: 0; } to { opacity: 1; } }

/* Sequência de entrada do hero (único momento de movimento "de carga") */
.rise { opacity: 0; transform: translateY(14px); animation: rise .8s cubic-bezier(.2,.7,.2,1) forwards; animation-delay: calc(var(--i, 0) * 110ms + 80ms); }
@keyframes rise { to { opacity: 1; transform: none; } }

/* ---------- Seções ---------- */
.section { padding: clamp(64px, 9vw, 120px) 0; }
.section__head { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 24px 64px; align-items: end; margin-bottom: clamp(32px, 5vw, 56px); }
.section__head h2 { font-size: clamp(2rem, 4.2vw, 3.4rem); }
.section__head p { margin: 0; color: var(--muted); max-width: 52ch; }

/* Serviços como lista editorial */
.rows { border-top: 1px solid var(--rule); }
.row { display: grid; grid-template-columns: 0.9fr 1.3fr 0.8fr; gap: 16px 40px; padding: 28px 0; border-bottom: 1px solid var(--line); align-items: start; }
.row h3 { font-size: clamp(1.3rem, 2.2vw, 1.75rem); }
.row p { margin: 0; color: var(--muted); }
.tags { display: flex; flex-wrap: wrap; gap: 8px; margin: 0; padding: 0; list-style: none; justify-content: flex-start; }
.tags li { padding: 5px 12px; border: 1px solid var(--line); border-radius: 999px; font-size: 0.85rem; color: var(--muted); background: var(--bg); }

/* Áreas — faixa escura */
.areas { background: var(--bg-2); color: var(--fg); }
.areas .section__head p { color: var(--muted); }
.areas__main { display: grid; grid-template-columns: 1fr 1fr; gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
.area { background: var(--bg-2); padding: clamp(24px, 4vw, 44px); display: flex; flex-direction: column; gap: 14px; }
.area h3 { font-size: clamp(1.8rem, 3.4vw, 2.8rem); }
.area p { margin: 0; color: var(--muted); max-width: 44ch; }
.area .tags li { background: transparent; border-color: var(--line); color: var(--muted); }
.area__glyph { width: 56px; height: 56px; color: var(--signal-text); }

/* Método */
.steps { position: relative; display: grid; grid-template-columns: repeat(4, 1fr); gap: 28px; padding-top: 44px; }
.steps__line { position: absolute; left: 0; right: 0; top: 14px; height: 2px; background: var(--line); }
.steps__line::after { content: ""; position: absolute; inset: 0; background: var(--signal-text); transform: scaleX(var(--progress, 0)); transform-origin: left; }
.step {
  position: relative; padding: 22px 22px 190px;
  border: 1px solid var(--line); border-radius: var(--radius); background: var(--bg);
}
.step > :not(.step__bg) { position: relative; z-index: 1; }
/* A animação ocupa a base do cartão, sempre abaixo do texto */
.step__bg {
  position: absolute; left: 0; right: 0; bottom: 0; z-index: 0; width: 100%; height: 170px;
  border-radius: 0 0 var(--radius) var(--radius); pointer-events: none;
  -webkit-mask-image: linear-gradient(to bottom, transparent 0%, #000 28%);
  mask-image: linear-gradient(to bottom, transparent 0%, #000 28%);
}
.step::before { content: ""; position: absolute; top: -37px; left: 0; width: 16px; height: 16px; border-radius: 50%; background: var(--bg); border: 2px solid var(--fg); }
.step__n { font-family: var(--font-display); font-weight: 700; color: var(--signal-text); font-size: 0.95rem; }
.step h3 { font-size: 1.35rem; margin: 4px 0 10px; }
.step p { margin: 0; color: var(--muted); font-size: 0.98rem; }

/* Casos */
.cases { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0; border-top: 1px solid var(--rule); }
.case { padding: 28px 28px 32px 0; border-right: 1px solid var(--line); }
.case + .case { padding-left: 28px; }
.case:last-child { border-right: 0; }
.case__area { font-size: 0.88rem; font-weight: 600; color: var(--signal-text); }
.case h3 { font-size: 1.4rem; margin: 8px 0 10px; }
.case p { margin: 0; color: var(--muted); }

/* Contato */
.contact { background: var(--bg-2); }
.contact__grid { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: clamp(28px, 5vw, 72px); }
form { display: grid; gap: 16px; }
.field { display: grid; gap: 6px; }
.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
label { font-weight: 600; font-size: 0.92rem; }
input, select, textarea {
  width: 100%; padding: 13px 14px; font: inherit; color: var(--fg);
  background: var(--bg); border: 1.5px solid var(--line); border-radius: 8px;
  transition: border-color .2s, box-shadow .2s;
}
textarea { min-height: 132px; resize: vertical; }
input:focus-visible, select:focus-visible, textarea:focus-visible { outline: none; border-color: var(--signal-text); box-shadow: 0 0 0 4px rgba(142, 154, 255, .2); }
.note { font-size: 0.9rem; color: var(--muted); margin: 0; }
.checklist { margin: 0; padding: 0; list-style: none; display: grid; gap: 0; border-top: 1px solid var(--rule); }
.checklist li { padding: 18px 0; border-bottom: 1px solid var(--line); }
.checklist b { display: block; font-family: var(--font-display); font-size: 1.15rem; margin-bottom: 2px; }
.checklist span { color: var(--muted); font-size: 0.97rem; }

/* Rodapé */
.footer { padding: 28px 0 40px; border-top: 1px solid var(--line); color: var(--muted); font-size: 0.93rem; }
.footer__inner { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; align-items: center; }
.footer a:hover { color: var(--fg); }
.footer nav { display: flex; gap: 18px; flex-wrap: wrap; }

/* Aviso */
.toast {
  position: fixed; left: 50%; bottom: 22px; z-index: 80;
  transform: translate(-50%, 20px); opacity: 0; pointer-events: none;
  background: var(--fg); color: var(--bg); padding: 12px 20px; border-radius: 999px;
  font-weight: 600; font-size: 0.95rem; transition: opacity .25s, transform .25s;
}
.toast.is-on { opacity: 1; transform: translate(-50%, 0); }

/* ---------- Responsivo ---------- */
@media (max-width: 980px) {
  .hero__grid, .section__head, .contact__grid { grid-template-columns: 1fr; }
  .row { grid-template-columns: 1fr; gap: 10px; }
  .areas__main { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr; row-gap: 32px; padding: 0 0 0 36px; }
  .steps__line { left: 7px; right: auto; top: 8px; bottom: 0; width: 2px; height: auto; }
  .steps__line::after { transform: scaleY(var(--progress, 0)); transform-origin: top; }
  .step::before { top: 22px; left: -37px; }
  .cases { grid-template-columns: 1fr; }
  .case, .case + .case { padding: 24px 0; border-right: 0; border-bottom: 1px solid var(--line); }

  .nav__toggle { display: inline-block; }
  .nav__actions .btn--ghost { display: none; }
  .menu {
    position: absolute; left: 0; right: 0; top: 68px; flex-direction: column; gap: 0;
    background: var(--bg); border-bottom: 1px solid var(--line); padding: 8px var(--gutter) 16px;
    transform: translateY(-8px); opacity: 0; pointer-events: none; transition: opacity .2s, transform .2s;
  }
  .menu.is-open { opacity: 1; transform: none; pointer-events: auto; }
  .menu a { padding: 14px 4px; border-radius: 0; border-bottom: 1px solid var(--line); font-size: 1.05rem; }
}
@media (max-width: 400px) {
  .nav__inner { gap: 8px; }
  .brand { font-size: 1.35rem; }
  .nav__actions { gap: 8px; }
  .nav__actions .btn--small { padding: 0 14px; }
  .hero h1 { font-size: 2.35rem; }
  .btn { width: 100%; }
  .btn--small { width: auto; }
  .hero__actions { flex-direction: column; }
}
@media (max-width: 560px) {
  .field-row { grid-template-columns: 1fr; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .rise { animation: none; opacity: 1; transform: none; }
  .steps__line::after { transform: none; }
  * { transition-duration: .01ms !important; }
}