/* ============================================================
   Castelani Sistemas — Identidade
   Cores da marca centralizadas aqui. Para ajustar ao logotipo,
   altere apenas as variáveis abaixo.
   ============================================================ */
:root{
  --ink:    #354D66;   /* azul da marca — fundos escuros e títulos */
  --steel:  #2b3f54;   /* azul mais fechado — superfícies de apoio */
  --volt:   #f5b301;   /* âmbar sinalização — destaque principal */
  --volt-d: #d99e00;
  --copper: #c96f2e;   /* cobre — detalhe secundário */
  --paper:  #f7f8f9;   /* fundo claro de seções */
  --white:  #ffffff;
  --text:   #2a3340;
  --muted:  #5c6a7a;
  --line:   #dde2e8;

  --font-display: "Archivo", system-ui, sans-serif;
  --font-body:    "IBM Plex Sans", system-ui, sans-serif;
  --font-mono:    "IBM Plex Mono", ui-monospace, monospace;

  --wrap: 1160px;
  --r: 10px;
}

*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation:none!important;transition:none!important}
}
body{
  font-family:var(--font-body);
  color:var(--text);
  background:var(--white);
  line-height:1.65;
  font-size:1.0625rem;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block}
a{color:inherit}
.wrap{max-width:var(--wrap);margin:0 auto;padding:0 20px}

h1,h2,h3,h4{font-family:var(--font-display);line-height:1.15;color:var(--ink);font-weight:800;letter-spacing:-.01em}
h1{font-size:clamp(2rem,4.5vw,3.2rem)}
h2{font-size:clamp(1.6rem,3vw,2.2rem)}
h3{font-size:1.25rem}
p+p{margin-top:1em}

.skip-link{position:absolute;left:-999px;top:0;background:var(--volt);color:var(--ink);padding:.6em 1em;z-index:200;font-weight:600}
.skip-link:focus{left:0}

:focus-visible{outline:3px solid var(--volt);outline-offset:2px}

/* ---------- Etiqueta de painel (assinatura visual) ---------- */
.tag{
  display:inline-block;
  font-family:var(--font-mono);
  font-size:.78rem;
  font-weight:600;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--ink);
  background:var(--volt);
  padding:.3em .8em .3em .7em;
  border-left:4px solid var(--ink);
  margin-bottom:1rem;
}
.tag--dark{background:var(--volt);border-left-color:var(--white)}

/* selo mono de normas */
.norma{
  display:inline-block;
  font-family:var(--font-mono);
  font-size:.78rem;
  font-weight:600;
  letter-spacing:.06em;
  color:var(--ink);
  background:var(--white);
  border:1px solid var(--line);
  border-bottom:3px solid var(--volt);
  padding:.35em .7em;
  margin:0 .4em .5em 0;
}

/* ---------- Botões ---------- */
.btn{
  display:inline-block;
  font-family:var(--font-display);
  font-weight:700;
  font-size:1rem;
  text-decoration:none;
  padding:.85em 1.7em;
  border-radius:6px;
  border:2px solid transparent;
  transition:transform .15s ease, background .15s ease, color .15s ease;
  cursor:pointer;
}
.btn:hover{transform:translateY(-2px)}
.btn--volt{background:var(--volt);color:var(--ink)}
.btn--volt:hover{background:var(--volt-d)}
.btn--dark{background:var(--ink);color:var(--white)}
.btn--dark:hover{background:var(--steel)}
.btn--ghost{border-color:var(--white);color:var(--white)}
.btn--ghost:hover{background:var(--white);color:var(--ink)}
.btn--linha{border-color:var(--ink);color:var(--ink)}
.btn--linha:hover{background:var(--ink);color:var(--white)}

/* ---------- Topbar ---------- */
.topbar{background:var(--ink);color:#c9d2dd;font-size:.85rem}
.topbar__in{display:flex;justify-content:space-between;align-items:center;padding-top:.45em;padding-bottom:.45em;gap:1em}
.topbar__local{font-family:var(--font-mono);font-size:.78rem;letter-spacing:.04em}
.topbar__fone{color:var(--volt);font-weight:600;text-decoration:none}
.topbar__fone:hover{text-decoration:underline}

/* ---------- Header ---------- */
.header{
  background:var(--white);
  border-bottom:1px solid var(--line);
  position:sticky;top:0;z-index:100;
}
.header__in{display:flex;align-items:center;justify-content:space-between;gap:2rem;padding-top:.8rem;padding-bottom:.8rem}
.header__logo img{width:190px;height:auto}
.nav{display:flex;align-items:center;gap:1.8rem}
.nav__list{display:flex;list-style:none;gap:1.6rem;align-items:center}
.nav__list a{
  text-decoration:none;font-weight:600;font-size:.98rem;color:var(--ink);
  padding:.4em 0;border-bottom:3px solid transparent;
}
.nav__list a:hover,.nav__list a[aria-current="page"]{border-bottom-color:var(--volt)}
.nav__caret{font-size:.7em;color:var(--muted)}

.nav__item--drop{position:relative}
.nav__drop{
  position:absolute;top:100%;left:-1rem;min-width:300px;
  background:var(--white);border:1px solid var(--line);border-top:3px solid var(--volt);
  box-shadow:0 14px 34px rgba(16,21,29,.14);
  list-style:none;padding:.5rem 0;
  opacity:0;visibility:hidden;transform:translateY(8px);
  transition:opacity .18s ease, transform .18s ease, visibility .18s;
}
.nav__item--drop:hover .nav__drop,
.nav__item--drop:focus-within .nav__drop{opacity:1;visibility:visible;transform:translateY(0)}
.nav__drop a{display:block;padding:.55em 1.2em;border-bottom:none;font-weight:500}
.nav__drop a:hover{background:var(--paper);border-bottom:none}

.header__burger{display:none;background:none;border:0;width:44px;height:44px;cursor:pointer;flex-direction:column;justify-content:center;gap:6px;align-items:center}
.header__burger span{display:block;width:26px;height:3px;background:var(--ink);transition:transform .2s, opacity .2s}
.header__burger[aria-expanded="true"] span:nth-child(1){transform:translateY(9px) rotate(45deg)}
.header__burger[aria-expanded="true"] span:nth-child(2){opacity:0}
.header__burger[aria-expanded="true"] span:nth-child(3){transform:translateY(-9px) rotate(-45deg)}

/* ---------- Hero ---------- */
.hero{
  background:
    linear-gradient(115deg, rgba(43,63,84,.93) 30%, rgba(53,77,102,.82)),
    url("/img/fundo-site-castelani-sistemas-energia-scaled.jpg") center/cover no-repeat,
    var(--ink);
  color:#e7ecf2;
  position:relative;
  overflow:hidden;
}
.hero__in{position:relative;z-index:1;padding:5.5rem 20px 5rem;max-width:var(--wrap);margin:0 auto}
.hero h1{color:var(--white);max-width:18ch}
.hero__sub{margin-top:1.2rem;max-width:56ch;font-size:1.15rem;color:#b9c4d1}
.hero__acoes{margin-top:2.2rem;display:flex;gap:1rem;flex-wrap:wrap}
.hero__normas{margin-top:2.6rem;display:flex;flex-wrap:wrap;align-items:center;gap:.2rem}
.hero__normas .norma{background:transparent;color:#e7ecf2;border-color:rgba(255,255,255,.22)}

/* hero interno (páginas de serviço) */
.hero--pagina .hero__in{padding:3.8rem 20px 3.4rem}
.breadcrumb{font-family:var(--font-mono);font-size:.78rem;letter-spacing:.05em;margin-bottom:1.2rem;color:#93a1b3}
.breadcrumb a{color:var(--volt);text-decoration:none}
.breadcrumb a:hover{text-decoration:underline}
.breadcrumb span[aria-current]{color:#c9d2dd}

/* ---------- Seções ---------- */
.secao{padding:4.5rem 0}
.secao--paper{background:var(--paper)}
.secao--ink{background:var(--ink);color:#c9d2dd}
.secao--ink h2,.secao--ink h3{color:var(--white)}
.secao__cab{max-width:62ch;margin-bottom:2.6rem}
.secao__cab p{color:var(--muted);margin-top:.6rem}
.secao--ink .secao__cab p{color:#93a1b3}

/* ---------- Grade de serviços ---------- */
.cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:1.4rem}
.card{
  background:var(--white);border:1px solid var(--line);border-radius:var(--r);
  padding:1.8rem;display:flex;flex-direction:column;gap:.8rem;
  text-decoration:none;color:var(--text);
  transition:transform .18s ease, box-shadow .18s ease, border-color .18s ease;
}
.card:hover{transform:translateY(-4px);box-shadow:0 16px 34px rgba(16,21,29,.1);border-color:var(--volt)}
.card__icone{width:64px;height:64px;object-fit:contain}
.card h3{color:var(--ink)}
.card p{font-size:.97rem;color:var(--muted);flex:1}
.card__link{font-family:var(--font-mono);font-size:.82rem;font-weight:600;letter-spacing:.06em;color:var(--ink)}
.card__link::after{content:" →";color:var(--copper)}
.card:hover .card__link{color:var(--copper)}

/* ---------- Duas colunas texto+imagem ---------- */
.duas{display:grid;grid-template-columns:1.05fr .95fr;gap:3.5rem;align-items:center}
.duas--inv{grid-template-columns:.95fr 1.05fr}
.duas__img{border-radius:var(--r);overflow:hidden;border:1px solid var(--line)}
.duas__img img{width:100%;object-fit:cover}
.duas ul{margin:1.2rem 0 0;padding-left:0;list-style:none}
.duas ul li{padding-left:1.7rem;position:relative;margin-bottom:.7rem}
.duas ul li::before{content:"";position:absolute;left:0;top:.5em;width:.85rem;height:.28rem;background:var(--volt)}

/* lista de checagem genérica */
.check{margin:1.2rem 0 0;padding-left:0;list-style:none}
.check li{padding-left:1.7rem;position:relative;margin-bottom:.7rem}
.check li::before{content:"";position:absolute;left:0;top:.5em;width:.85rem;height:.28rem;background:var(--volt)}

/* ---------- Métricas / diferenciais ---------- */
.stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:1.4rem}
.stat{border-left:4px solid var(--volt);padding:.4rem 0 .4rem 1.3rem}
.stat b{display:block;font-family:var(--font-mono);font-size:1.5rem;color:var(--white);font-weight:600}
.stat span{font-size:.94rem}

/* ---------- Processo numerado ---------- */
.passos{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:1.4rem;counter-reset:passo}
.passo{background:var(--white);border:1px solid var(--line);border-radius:var(--r);padding:1.6rem;counter-increment:passo}
.passo::before{
  content:counter(passo,decimal-leading-zero);
  font-family:var(--font-mono);font-weight:600;font-size:.85rem;
  color:var(--ink);background:var(--volt);padding:.2em .6em;display:inline-block;margin-bottom:.9rem;
}
.passo h3{font-size:1.08rem;margin-bottom:.4rem}
.passo p{font-size:.95rem;color:var(--muted)}

/* ---------- FAQ ---------- */
.faq{max-width:820px}
.faq details{border:1px solid var(--line);border-radius:8px;background:var(--white);margin-bottom:.8rem}
.faq summary{
  cursor:pointer;font-family:var(--font-display);font-weight:700;color:var(--ink);
  padding:1.1rem 1.3rem;list-style:none;display:flex;justify-content:space-between;gap:1rem;align-items:center;
}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";font-family:var(--font-mono);color:var(--copper);font-size:1.3rem;line-height:1}
.faq details[open] summary::after{content:"–"}
.faq details[open] summary{border-bottom:1px solid var(--line)}
.faq .faq__resp{padding:1rem 1.3rem 1.3rem;color:var(--muted)}

/* ---------- Conteúdo editorial (páginas de serviço) ---------- */
.artigo h2{margin:2.6rem 0 1rem}
.artigo h3{margin:1.8rem 0 .6rem}
.artigo ul{margin:1rem 0 1rem;padding-left:0;list-style:none}
.artigo ul li{padding-left:1.7rem;position:relative;margin-bottom:.6rem}
.artigo ul li::before{content:"";position:absolute;left:0;top:.55em;width:.85rem;height:.28rem;background:var(--volt)}
.artigo .destaque{
  background:var(--paper);border-left:4px solid var(--volt);
  padding:1.3rem 1.5rem;border-radius:0 8px 8px 0;margin:1.6rem 0;
}
.artigo .destaque p{margin:0}
.artigo--grid{display:grid;grid-template-columns:minmax(0,1fr) 340px;gap:3.5rem;align-items:start}
.lateral{position:sticky;top:96px;display:flex;flex-direction:column;gap:1.2rem}
.lateral__box{background:var(--ink);color:#c9d2dd;border-radius:var(--r);padding:1.7rem}
.lateral__box h3{color:var(--white);margin-bottom:.6rem}
.lateral__box .btn{width:100%;text-align:center;margin-top:1rem}
.lateral__nav{background:var(--paper);border:1px solid var(--line);border-radius:var(--r);padding:1.4rem 1.6rem}
.lateral__nav h3{font-size:1rem;margin-bottom:.7rem}
.lateral__nav ul{list-style:none}
.lateral__nav li{margin-bottom:.45rem}
.lateral__nav a{font-size:.93rem;color:var(--text);text-decoration:none}
.lateral__nav a:hover{color:var(--copper);text-decoration:underline}
.lateral__figs img{border-radius:var(--r);border:1px solid var(--line)}
.lateral__figs img + img{margin-top:1rem}

/* ---------- CTA final ---------- */
.cta-final{background:var(--steel);color:#c9d2dd;border-top:4px solid var(--volt)}
.cta-final__in{display:grid;grid-template-columns:1.4fr .8fr;gap:2.5rem;align-items:center;padding-top:3.6rem;padding-bottom:3.6rem}
.cta-final__titulo{color:var(--white);font-size:clamp(1.4rem,2.6vw,1.9rem)}
.cta-final__texto{margin-top:.7rem;color:#93a1b3}
.cta-final__acoes{display:flex;flex-direction:column;gap:.9rem}
.cta-final__acoes .btn{text-align:center}

/* ---------- Footer ---------- */
.footer{background:var(--ink);color:#93a1b3;font-size:.95rem}
.footer a{color:#c9d2dd;text-decoration:none}
.footer a:hover{color:var(--volt)}
.footer__grid{display:grid;grid-template-columns:1.2fr 1fr .8fr 1fr;gap:2.5rem;padding-top:3.5rem;padding-bottom:3rem}
.footer__logo{width:180px;margin-bottom:1rem;filter:brightness(0) invert(1)} /* remova o filter se o logo já for claro */
.footer__titulo{color:var(--white);font-size:.85rem;font-family:var(--font-mono);font-weight:600;letter-spacing:.12em;text-transform:uppercase;margin-bottom:1rem;padding-bottom:.5rem;border-bottom:2px solid var(--volt);display:inline-block}
.footer__lista{list-style:none}
.footer__lista li{margin-bottom:.5rem}
.footer__base{border-top:1px solid rgba(255,255,255,.1)}
.footer__base-in{display:flex;justify-content:space-between;gap:1rem;flex-wrap:wrap;padding-top:1.2rem;padding-bottom:1.2rem;font-size:.85rem}
.footer__cidade{font-family:var(--font-mono);font-size:.75rem;letter-spacing:.03em}

/* ---------- WhatsApp flutuante ---------- */
.whats-flutuante{
  position:fixed;right:20px;bottom:20px;z-index:90;
  width:58px;height:58px;border-radius:50%;
  background:#25d366;color:#fff;display:flex;align-items:center;justify-content:center;
  box-shadow:0 8px 24px rgba(0,0,0,.28);
  transition:transform .15s ease;
}
.whats-flutuante:hover{transform:scale(1.08)}

/* ---------- Formulário ---------- */
.form{display:grid;gap:1.1rem;max-width:640px}
.form label{font-weight:600;color:var(--ink);font-size:.95rem;display:block;margin-bottom:.3rem}
.form input,.form select,.form textarea{
  width:100%;padding:.8em 1em;border:1px solid var(--line);border-radius:6px;
  font:inherit;color:var(--text);background:var(--white);
}
.form input:focus,.form select:focus,.form textarea:focus{border-color:var(--volt);outline:2px solid var(--volt)}
.form textarea{min-height:140px;resize:vertical}
.aviso{padding:1rem 1.3rem;border-radius:8px;margin-bottom:1.5rem;font-weight:500}
.aviso--ok{background:#e7f6ec;border:1px solid #9fd8b0;color:#1c6b35}
.aviso--erro{background:#fdecec;border:1px solid #f0b3b3;color:#a13030}
.contato-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:3.5rem;align-items:start}
.contato-cartoes{display:grid;gap:1.2rem}
.contato-cartao{background:var(--paper);border:1px solid var(--line);border-radius:var(--r);padding:1.5rem}
.contato-cartao h3{font-size:1.05rem;margin-bottom:.3rem}
.contato-cartao a{color:var(--copper);font-weight:600;text-decoration:none}
.contato-cartao a:hover{text-decoration:underline}
.contato-cartao p{font-size:.95rem;color:var(--muted)}

/* ---------- Responsivo ---------- */
@media (max-width: 960px){
  .duas,.duas--inv,.artigo--grid,.contato-grid{grid-template-columns:1fr;gap:2.2rem}
  .lateral{position:static}
  .cta-final__in{grid-template-columns:1fr}
  .footer__grid{grid-template-columns:1fr 1fr}
}
@media (max-width: 820px){
  .header__burger{display:flex}
  .nav{
    position:fixed;inset:0;top:0;padding:5.5rem 2rem 2rem;
    background:var(--white);flex-direction:column;align-items:flex-start;
    transform:translateX(100%);transition:transform .25s ease;z-index:99;overflow-y:auto;
  }
  .nav.aberto{transform:translateX(0)}
  .header__burger{position:relative;z-index:100}
  .nav__list{flex-direction:column;align-items:flex-start;gap:.4rem;width:100%}
  .nav__list a{font-size:1.15rem;display:block;padding:.5em 0}
  .nav__drop{position:static;opacity:1;visibility:visible;transform:none;border:none;box-shadow:none;padding:0 0 0 1rem;min-width:0}
  .nav__drop a{font-size:1rem;padding:.4em 0}
  .nav__cta{margin-top:1rem}
  .topbar__in{justify-content:center}
  .topbar__local{display:none}
}
@media (max-width: 560px){
  .footer__grid{grid-template-columns:1fr}
  .hero__in{padding-top:3.5rem;padding-bottom:3.5rem}
  .secao{padding:3.2rem 0}
}