/* =============================================================================
   GLEYSON BONANI ENGENHARIA — Folha de estilos principal
   Metodologia: BEM (Bloco__Elemento--Modificador)
   Estratégia: Mobile First • Responsivo • Acessível • Performance

   Sumário:
   1) Variáveis (cores, tipografia, espaçamentos) — EDITAR AQUI para tema
   2) Reset e base
   3) Utilitários (container, grid, botões, reveal)
   4) Header / Navegação
   5) Hero
   6) Seções gerais / Cards / Pilares / Prose
   7) Serviços
   8) Projetos
   9) Contato / Formulário
   10) CTA
   11) Footer
   12) Botões flutuantes (FAB)
   13) Animações
   14) Media Queries (breakpoints)
   ============================================================================= */

/* -----------------------------------------------------------------------------
   1) VARIÁVEIS GLOBAIS — altere aqui as cores da identidade visual
----------------------------------------------------------------------------- */
:root {
  --color-primary:    #0B2545;   /* Azul-marinho profundo (Engenharia) */
  --color-secondary:  #13315C;   /* Azul aço secundário */
  --color-accent:     #C9A227;   /* Dourado (sofisticação / premium) */
  --color-text:       #1B1F27;   /* Texto principal */
  --color-muted:      #5A6473;   /* Texto suave */
  --color-bg:         #F7F8FA;   /* Fundo geral */
  --color-card:       #FFFFFF;   /* Cards / superfícies */
  --color-border:     #E4E7EC;   /* Bordas suaves */
  --color-dark:       #0A1929;   /* Fundos escuros */
  --color-white:      #FFFFFF;

  --font-sans: 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;
  --font-display: 'Georgia', 'Times New Roman', serif;

  --container: 1200px;
  --radius: 14px;
  --radius-sm: 8px;
  --shadow-sm: 0 2px 8px rgba(11, 37, 69, 0.06);
  --shadow-md: 0 10px 30px rgba(11, 37, 69, 0.10);
  --shadow-lg: 0 20px 50px rgba(11, 37, 69, 0.16);
  --transition: 0.3s ease;
  --header-h: 76px;
}

/* -----------------------------------------------------------------------------
   2) RESET E BASE
----------------------------------------------------------------------------- */
*,*::before,*::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  padding-top: var(--header-h);
}
img { max-width: 100%; height: auto; display: block; }
ul { list-style: none; }
a { color: inherit; text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--color-accent); }
:focus-visible { outline: 3px solid var(--color-accent); outline-offset: 3px; border-radius: 4px; }
h1,h2,h3,h4 { font-family: var(--font-display); color: var(--color-primary); line-height: 1.2; font-weight: 700; letter-spacing: -0.01em; }

/* -----------------------------------------------------------------------------
   3) UTILITÁRIOS
----------------------------------------------------------------------------- */
.container { width: 100%; max-width: var(--container); margin: 0 auto; padding: 0 20px; }
.grid { display: grid; gap: 24px; }
.grid--cards    { grid-template-columns: 1fr; }
.grid--services { grid-template-columns: 1fr; }
.grid--3        { grid-template-columns: 1fr; }

/* Botões */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 14px 26px; font-weight: 600; font-size: 0.95rem;
  border-radius: var(--radius-sm); border: 1px solid transparent; cursor: pointer;
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition), color var(--transition), border-color var(--transition);
  letter-spacing: 0.02em; text-align: center;
}
.btn:hover { transform: translateY(-2px); }
.btn--primary { background: var(--color-primary); color: var(--color-white); box-shadow: 0 8px 24px rgba(11,37,69,0.25); }
.btn--primary:hover { background: var(--color-secondary); color: var(--color-white); box-shadow: var(--shadow-lg); }
.btn--ghost { background: transparent; color: var(--color-primary); border-color: var(--color-primary); }
.btn--ghost:hover { background: var(--color-primary); color: var(--color-white); }
.btn--dark { background: var(--color-dark); color: var(--color-white); }
.btn--dark:hover { background: var(--color-primary); color: var(--color-white); }
.btn--lg { padding: 16px 34px; font-size: 1rem; }
.btn--sm { padding: 10px 18px; font-size: 0.85rem; }

/* Reveal — animação via IntersectionObserver */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity 0.7s ease, transform 0.7s ease; }
.reveal.is-visible { opacity: 1; transform: translateY(0); }

/* Cabeçalhos de seção */
.section { padding: 72px 0; }
.section--alt { background: var(--color-white); }
.section__header { max-width: 780px; margin: 0 auto 40px; text-align: center; }
.section__eyebrow {
  display: inline-block; font-size: 0.8rem; font-weight: 700;
  letter-spacing: 0.18em; text-transform: uppercase;
  color: var(--color-accent); margin-bottom: 12px;
}
.section__title { font-size: clamp(1.75rem, 3vw, 2.5rem); }
.section__lead { color: var(--color-muted); margin-top: 12px; }

.prose { max-width: 820px; margin: 0 auto; color: var(--color-muted); font-size: 1.05rem; }
.prose p + p { margin-top: 18px; }
.prose strong { color: var(--color-primary); }

/* Cabeçalho de página interna */
.pageheader {
  background: linear-gradient(180deg, var(--color-primary) 0%, var(--color-secondary) 100%);
  color: var(--color-white); padding: 80px 0 60px; position: relative; overflow: hidden;
}
.pageheader::after {
  content: ""; position: absolute; right: -80px; top: -80px;
  width: 260px; height: 260px; border: 1px solid rgba(201,162,39,0.35); border-radius: 50%;
}
.pageheader__title { color: var(--color-white); font-size: clamp(2rem, 4vw, 3rem); margin-top: 8px; }
.pageheader__lead  { max-width: 640px; margin-top: 14px; color: rgba(255,255,255,0.85); font-size: 1.05rem; }
.pageheader .section__eyebrow { color: var(--color-accent); }

/* -----------------------------------------------------------------------------
   4) HEADER / NAV
----------------------------------------------------------------------------- */
.header {
  position: fixed; top: 0; left: 0; right: 0; height: var(--header-h);
  background: rgba(255,255,255,0.92);
  backdrop-filter: saturate(160%) blur(10px);
  border-bottom: 1px solid var(--color-border);
  z-index: 100;
  transition: transform var(--transition), box-shadow var(--transition);
}
.header.is-scrolled { box-shadow: var(--shadow-sm); }
.header.is-hidden { transform: translateY(-100%); }

.header__container {
  height: 100%; max-width: var(--container); margin: 0 auto; padding: 0 20px;
  display: flex; align-items: center; justify-content: space-between; gap: 20px;
}
.header__logo { display: flex; align-items: center; gap: 12px; }
.header__logo-mark {
  width: 42px; height: 42px; display: inline-flex; align-items: center; justify-content: center;
  background: var(--color-primary); color: var(--color-white); font-weight: 800;
  border-radius: 10px; font-family: var(--font-display); letter-spacing: 0.02em;
  box-shadow: inset 0 0 0 1px var(--color-accent);
}
.header__logo-text { font-family: var(--font-display); font-size: 0.95rem; color: var(--color-primary); line-height: 1.1; font-weight: 700; }
.header__logo-text small { font-weight: 400; color: var(--color-muted); font-size: 0.75rem; letter-spacing: 0.14em; text-transform: uppercase; }

.header__toggle { display: inline-flex; flex-direction: column; gap: 5px; background: transparent; border: 0; padding: 8px; cursor: pointer; }
.header__toggle span { width: 26px; height: 2px; background: var(--color-primary); transition: transform var(--transition), opacity var(--transition); }
.header__toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.header__toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.header__toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.nav {
  position: fixed; top: var(--header-h); left: 0; right: 0;
  background: var(--color-white); border-bottom: 1px solid var(--color-border);
  transform: translateY(-120%); transition: transform var(--transition); padding: 20px;
}
.nav.is-open { transform: translateY(0); }
.nav__list { display: flex; flex-direction: column; gap: 8px; }
.nav__link { display: block; padding: 12px 8px; font-weight: 600; color: var(--color-primary); border-radius: 6px; position: relative; }
.nav__link--active { color: var(--color-accent); }
.nav__link--cta { background: var(--color-primary); color: var(--color-white); text-align: center; }
.nav__link--cta:hover { background: var(--color-secondary); color: var(--color-white); }

/* -----------------------------------------------------------------------------
   5) HERO
----------------------------------------------------------------------------- */
.hero {
  position: relative; padding: 60px 0 80px;
  background:
    radial-gradient(1200px 400px at 100% 0%, rgba(201,162,39,0.10), transparent 60%),
    linear-gradient(180deg, #FFFFFF 0%, var(--color-bg) 100%);
  overflow: hidden;
}
.hero__container { max-width: var(--container); margin: 0 auto; padding: 0 20px; display: grid; gap: 40px; align-items: center; }
.hero__eyebrow {
  display: inline-block; font-size: 0.78rem; font-weight: 700; letter-spacing: 0.22em;
  text-transform: uppercase; color: var(--color-accent);
  padding: 6px 12px; border: 1px solid rgba(201,162,39,0.35); border-radius: 999px; margin-bottom: 20px;
}
.hero__title { font-size: clamp(2rem, 5vw, 3.4rem); color: var(--color-primary); margin-bottom: 18px; }
.hero__title-accent { color: var(--color-accent); }
.hero__subtitle { color: var(--color-muted); font-size: 1.05rem; max-width: 560px; margin-bottom: 28px; }
.hero__actions { display: flex; gap: 12px; flex-wrap: wrap; }
.hero__media {
  position: relative; border-radius: var(--radius); min-height: 260px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  box-shadow: var(--shadow-lg); overflow: hidden;
}
.hero__media img { width: 100%; height: 100%; object-fit: cover; display: block; }
.hero__media-frame { position: absolute; inset: 12px; border: 1px solid rgba(255,255,255,0.25); border-radius: calc(var(--radius) - 4px); pointer-events: none; }

/* -----------------------------------------------------------------------------
   6) CARDS / PILARES / SOBRE
----------------------------------------------------------------------------- */
.card {
  background: var(--color-card); border: 1px solid var(--color-border);
  border-radius: var(--radius); padding: 28px;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
  position: relative;
}
.card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); border-color: rgba(201,162,39,0.5); }
.card__icon {
  width: 56px; height: 56px; display: inline-flex; align-items: center; justify-content: center;
  border-radius: 12px; background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  color: var(--color-white); font-size: 1.6rem; margin-bottom: 18px;
}
.card__title { font-size: 1.15rem; margin-bottom: 8px; }
.card__text  { color: var(--color-muted); font-size: 0.95rem; }

.pillar {
  background: var(--color-card); border-radius: var(--radius);
  padding: 32px; border-top: 3px solid var(--color-accent); box-shadow: var(--shadow-sm);
}
.pillar__title { color: var(--color-primary); margin-bottom: 12px; font-size: 1.3rem; }
.pillar__text  { color: var(--color-muted); }
.pillar__list  { display: grid; gap: 8px; color: var(--color-text); }
.pillar__list li::before { content: "▸ "; color: var(--color-accent); font-weight: 700; }

.about { display: grid; gap: 40px; align-items: start; }
.about__text p + p { margin-top: 16px; }
.about__text { color: var(--color-muted); font-size: 1.02rem; }
.about__text strong { color: var(--color-primary); }
.about__figure {
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  border-radius: var(--radius); overflow: hidden; min-height: 320px; box-shadow: var(--shadow-md);
}
.about__figure img { width: 100%; height: 100%; object-fit: cover; }
.about__creds {
  margin-top: 20px; background: var(--color-card); border: 1px solid var(--color-border);
  border-radius: var(--radius); padding: 20px 22px; font-size: 0.95rem; color: var(--color-muted);
}
.about__creds ul { display: grid; gap: 8px; margin-top: 10px; }
.about__creds li::before { content: "• "; color: var(--color-accent); font-weight: 700; }

/* -----------------------------------------------------------------------------
   7) SERVIÇOS
----------------------------------------------------------------------------- */
.service {
  background: var(--color-card); border: 1px solid var(--color-border);
  border-radius: var(--radius); padding: 36px 30px;
  display: flex; flex-direction: column; align-items: flex-start; gap: 14px;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
  position: relative; overflow: hidden;
}
.service::before {
  content: ""; position: absolute; inset: auto 0 0 0; height: 3px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
  transform: scaleX(0); transform-origin: left; transition: transform 0.5s ease;
}
.service:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); }
.service:hover::before { transform: scaleX(1); }
.service__icon {
  width: 60px; height: 60px; display: inline-flex; align-items: center; justify-content: center;
  border-radius: 14px; background: rgba(11,37,69,0.06); color: var(--color-primary); font-size: 1.6rem;
}
.service__title { font-size: 1.25rem; }
.service__text  { color: var(--color-muted); flex: 1; }

/* -----------------------------------------------------------------------------
   8) PROJETOS
----------------------------------------------------------------------------- */
.project { padding: 80px 0; position: relative; }
.project__grid { display: grid; gap: 40px; align-items: center; }
.project__body { max-width: 560px; }
.project__number {
  display: inline-block; font-family: var(--font-display); font-size: 3rem;
  font-weight: 700; color: var(--color-accent); line-height: 1; margin-bottom: 12px;
}
.project__title { font-size: clamp(1.5rem, 3vw, 2.2rem); margin-bottom: 14px; }
.project__text { font-size: 1.05rem; margin-bottom: 22px; }
.project__media {
  border-radius: var(--radius); overflow: hidden; min-height: 280px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  box-shadow: var(--shadow-md);
}
.project__media img { width: 100%; height: 100%; object-fit: cover; }

.project--01 { background: var(--color-dark); color: var(--color-white); }
.project--01 .project__title { color: var(--color-white); }
.project--01 .project__text  { color: rgba(255,255,255,0.8); }

.project--02 { background: var(--color-white); }
.project--02 .project__text  { color: var(--color-muted); }

.project--03 {
  background:
    radial-gradient(700px 300px at 50% 0%, rgba(201,162,39,0.10), transparent 70%),
    var(--color-bg);
}
.project__center { max-width: 780px; margin: 0 auto; text-align: center; padding: 20px 0; }

/* -----------------------------------------------------------------------------
   9) CONTATO / FORMULÁRIO
----------------------------------------------------------------------------- */
.contact { display: grid; gap: 40px; align-items: start; }
.contact__block { margin-bottom: 22px; }
.contact__title {
  font-size: 0.85rem; letter-spacing: 0.18em; text-transform: uppercase;
  color: var(--color-accent); margin-bottom: 6px;
}
.contact__info address { font-style: normal; color: var(--color-text); }
.contact__info a { color: var(--color-primary); font-weight: 600; }
.contact__map {
  margin-top: 30px; min-height: 240px; border-radius: var(--radius);
  background: repeating-linear-gradient(45deg, #EEF1F6 0 12px, #E4E7EC 12px 24px);
  color: var(--color-muted); display: flex; align-items: center; justify-content: center;
  border: 1px solid var(--color-border); font-size: 0.9rem;
}

.form {
  background: var(--color-card); border: 1px solid var(--color-border);
  border-radius: var(--radius); padding: 32px; box-shadow: var(--shadow-sm);
  display: grid; gap: 18px;
}
.form__row { display: grid; gap: 6px; }
.form__label { font-size: 0.85rem; font-weight: 700; color: var(--color-primary); letter-spacing: 0.04em; }
.form__input {
  width: 100%; padding: 12px 14px; border: 1px solid var(--color-border);
  border-radius: var(--radius-sm); font: inherit; color: var(--color-text); background: #FBFCFD;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.form__input:focus { border-color: var(--color-primary); box-shadow: 0 0 0 3px rgba(11,37,69,0.12); outline: none; }
.form__input--area { resize: vertical; min-height: 130px; }
.form__input.is-invalid { border-color: #C0392B; box-shadow: 0 0 0 3px rgba(192,57,43,0.15); }
.form__error { color: #C0392B; font-size: 0.82rem; min-height: 1em; }
.form__success { padding: 12px 14px; background: #E9F7EF; color: #1E7E34; border-radius: var(--radius-sm); font-weight: 600; }

/* -----------------------------------------------------------------------------
   10) CTA
----------------------------------------------------------------------------- */
.cta {
  background:
    radial-gradient(600px 200px at 100% 0%, rgba(201,162,39,0.15), transparent 60%),
    linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  color: var(--color-white); padding: 60px 0;
}
.cta__container { text-align: center; }
.cta__title { color: var(--color-white); font-size: clamp(1.5rem, 3vw, 2rem); }
.cta__text  { margin: 12px auto 26px; color: rgba(255,255,255,0.85); max-width: 640px; }

/* -----------------------------------------------------------------------------
   11) FOOTER
----------------------------------------------------------------------------- */
.footer { background: var(--color-dark); color: rgba(255,255,255,0.75); padding: 60px 0 0; margin-top: 40px; }
.footer a { color: rgba(255,255,255,0.75); }
.footer a:hover { color: var(--color-accent); }
.footer__grid { display: grid; gap: 36px; grid-template-columns: 1fr; padding-bottom: 40px; }
.footer__title { color: var(--color-white); font-size: 0.95rem; margin-bottom: 12px; letter-spacing: 0.06em; text-transform: uppercase; }
.footer__brand-text { font-family: var(--font-display); color: var(--color-white); font-weight: 700; margin-top: 12px; line-height: 1.2; }
.footer__tagline { margin-top: 8px; font-size: 0.9rem; }
.footer__nav ul, .footer__social-list { display: grid; gap: 8px; }
.footer address { font-style: normal; font-size: 0.92rem; line-height: 1.7; }
.footer__bottom { border-top: 1px solid rgba(255,255,255,0.08); padding: 18px 0; text-align: center; font-size: 0.85rem; color: rgba(255,255,255,0.55); }

/* -----------------------------------------------------------------------------
   12) FAB — WhatsApp e Voltar ao topo
----------------------------------------------------------------------------- */
.fab {
  position: fixed; right: 20px; width: 52px; height: 52px; border-radius: 50%;
  display: inline-flex; align-items: center; justify-content: center;
  color: var(--color-white); box-shadow: var(--shadow-md);
  border: 0; cursor: pointer; z-index: 90;
  transition: transform var(--transition), background var(--transition), opacity var(--transition);
}
.fab:hover { transform: translateY(-3px) scale(1.05); }
.fab--whatsapp { bottom: 88px; background: #25D366; }
.fab--whatsapp:hover { background: #1EBE5A; color: var(--color-white); }
.fab--top { bottom: 24px; background: var(--color-primary); opacity: 0; pointer-events: none; }
.fab--top.is-visible { opacity: 1; pointer-events: auto; }

/* -----------------------------------------------------------------------------
   13) ANIMAÇÕES
----------------------------------------------------------------------------- */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: translateY(0); }
}
@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
  .reveal { opacity: 1; transform: none; }
}

/* -----------------------------------------------------------------------------
   14) MEDIA QUERIES — Mobile First
----------------------------------------------------------------------------- */
@media (min-width: 640px) {
  .grid--cards    { grid-template-columns: repeat(2, 1fr); }
  .grid--services { grid-template-columns: repeat(2, 1fr); }
  .grid--3        { grid-template-columns: repeat(3, 1fr); }
}
@media (min-width: 992px) {
  .grid--cards    { grid-template-columns: repeat(3, 1fr); }
  .grid--services { grid-template-columns: repeat(3, 1fr); }

  .hero__container { grid-template-columns: 1.1fr 0.9fr; }
  .hero__media { min-height: 460px; }

  .about   { grid-template-columns: 1.4fr 1fr; }
  .contact { grid-template-columns: 1fr 1.2fr; }

  .project__grid          { grid-template-columns: 1fr 1fr; }
  .project__grid--reverse { direction: rtl; }
  .project__grid--reverse > * { direction: ltr; }

  .header__toggle { display: none; }
  .nav { position: static; transform: none; background: transparent; border: 0; padding: 0; }
  .nav__list { flex-direction: row; align-items: center; gap: 6px; }
  .nav__link { padding: 10px 16px; }
  .nav__link--active::after { content: ""; display: block; height: 2px; background: var(--color-accent); margin-top: 4px; border-radius: 2px; }
  .nav__link--cta::after { display: none; }

  .footer__grid { grid-template-columns: 1.4fr 1fr 1.2fr 1fr; }
}
@media (min-width: 1400px) {
  :root { --container: 1320px; }
}