/* ==========================================================================
   SONAFA ENGENHARIA — style.css
   Direção: prancha técnica de engenharia elétrica.
   Paleta: azul-projeto profundo + cobre (energia) + ciano (esquemático)
   Tipografia: Space Grotesk (display) / IBM Plex Sans (texto) / IBM Plex Mono (dados)
   ========================================================================== */

:root{
  --bg:            #0a1a28;
  --bg-raised:     #0e2233;
  --bg-panel:      #102638;
  --line:          rgba(158, 186, 209, .16);
  --line-strong:   rgba(158, 186, 209, .32);
  --grid-line:     rgba(94, 168, 214, .055);

  --ink:           #eef4f9;
  --ink-muted:     #9db2c4;
  --ink-faint:     #6c8299;

  --copper:        #e2872a;
  --copper-soft:   rgba(226, 135, 42, .14);
  --cyan:          #43b4e6;
  --cyan-soft:     rgba(67, 180, 230, .14);
  --ok:            #57c17f;

  --display: "Space Grotesk", "IBM Plex Sans", sans-serif;
  --body:    "IBM Plex Sans", sans-serif;
  --mono:    "IBM Plex Mono", ui-monospace, monospace;

  --edge: 4px;
  --edge-lg: 18px;

  --container: 1180px;
  --nav-h: 84px;
}

*,*::before,*::after{ box-sizing:border-box; }
html{ scroll-behavior:smooth; }
html,body{ background:var(--bg); }

body{
  margin:0;
  font-family:var(--body);
  color:var(--ink);
  line-height:1.65;
  font-size:16px;
  -webkit-font-smoothing:antialiased;
  position:relative;
}

/* faint drafting grid across the whole page */
body::before{
  content:"";
  position:fixed;
  inset:0;
  z-index:0;
  pointer-events:none;
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 42px 42px;
  mask-image: radial-gradient(ellipse 90% 70% at 50% 0%, #000 30%, transparent 85%);
}

img{ max-width:100%; display:block; }
a{ color:inherit; }
ul{ list-style:none; margin:0; padding:0; }
button{ font-family:inherit; cursor:pointer; }
input,textarea{ font-family:inherit; }

.container{
  width:min(var(--container), 92%);
  margin-inline:auto;
  position:relative;
  z-index:1;
}

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

section{ padding:120px 0; position:relative; z-index:1; }

/* ---------- reveal-on-scroll -------------------------------------------- */
.reveal{ opacity:0; transform:translateY(22px); transition:opacity .7s ease, transform .7s ease; }
.reveal.mostrar{ opacity:1; transform:none; }
@media (prefers-reduced-motion:reduce){
  .reveal{ opacity:1; transform:none; transition:none; }
  *{ animation-duration:.001ms !important; animation-iteration-count:1 !important; transition-duration:.001ms !important; scroll-behavior:auto !important; }
}

/* ---------- eyebrow / sheet labels (mirrors real drawing-sheet indexing) - */
.folha{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-family:var(--mono);
  font-size:.72rem;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--copper);
  margin-bottom:18px;
}
.folha::before{
  content:"";
  width:22px; height:1px;
  background:var(--copper);
}

.titulo{ max-width:640px; margin-bottom:56px; }
.titulo h2{
  font-family:var(--display);
  font-size:clamp(1.9rem, 3.2vw, 2.7rem);
  font-weight:600;
  color:var(--ink);
  letter-spacing:-.01em;
  margin:0 0 14px;
}
.titulo > p{
  color:var(--ink-muted);
  font-size:1.03rem;
  max-width:56ch;
}

/* ---------- corner-bracket frame (drafting crop marks) ------------------- */
.brackets{ position:relative; }
.brackets::before,
.brackets::after{
  content:"";
  position:absolute;
  width:16px; height:16px;
  border:1.5px solid var(--cyan);
  opacity:.7;
  pointer-events:none;
}
.brackets::before{ top:-1px; left:-1px; border-right:none; border-bottom:none; }
.brackets::after{ bottom:-1px; right:-1px; border-left:none; border-top:none; }

/* ==========================================================================
   HEADER / NAV
   ========================================================================== */
header{
  position:fixed; inset:0 0 auto 0;
  height:var(--nav-h);
  z-index:1000;
  background:rgba(9, 21, 33, .78);
  backdrop-filter:blur(14px) saturate(140%);
  border-bottom:1px solid var(--line);
  transition:background .3s ease, box-shadow .3s ease, border-color .3s ease;
}
header.rolado{
  background:rgba(7, 16, 26, .94);
  box-shadow:0 12px 32px rgba(0,0,0,.35);
  border-color:var(--line-strong);
}
header .container{
  height:100%;
  display:flex;
  align-items:center;
  justify-content:space-between;
}

.marca{
  display:flex;
  align-items:center;
  gap:12px;
  text-decoration:none;
  color:var(--ink);
}
.marca-mark{ display:flex; align-items:center; flex-shrink:0; }
.marca-mark .logo-img{ height:42px; width:auto; }
.marca-mark .logo-fallback{ width:38px; height:38px; display:none; }
.marca-mark.sem-logo .logo-fallback{ display:block; }
.marca-texto{ display:flex; flex-direction:column; line-height:1.15; }
.marca-texto strong{
  font-family:var(--display);
  font-size:1.12rem;
  font-weight:700;
  letter-spacing:.01em;
}
.marca-texto span{
  font-family:var(--mono);
  font-size:.62rem;
  letter-spacing:.16em;
  color:var(--ink-faint);
  text-transform:uppercase;
}

nav ul{ display:flex; align-items:center; gap:8px; }
nav a{
  display:inline-block;
  padding:10px 16px;
  text-decoration:none;
  color:var(--ink-muted);
  font-size:.92rem;
  font-weight:500;
  border-radius:2px;
  transition:color .2s ease, background .2s ease;
}
nav a:hover{ color:var(--ink); background:rgba(255,255,255,.04); }

.nav-direita{ display:flex; align-items:center; gap:18px; }

.btn-topo{
  font-family:var(--mono);
  font-size:.76rem;
  letter-spacing:.1em;
  text-decoration:none;
  color:var(--bg);
  background:var(--copper);
  padding:11px 20px;
  font-weight:600;
  clip-path: polygon(9px 0, 100% 0, 100% calc(100% - 9px), calc(100% - 9px) 100%, 0 100%, 0 9px);
  transition:background .2s ease, transform .2s ease;
}
.btn-topo:hover{ background:#f39a3d; transform:translateY(-1px); }

.hamburguer{
  display:none;
  width:40px; height:40px;
  background:none; border:1px solid var(--line-strong);
  align-items:center; justify-content:center;
  color:var(--ink);
}
.hamburguer svg{ width:20px; height:20px; }

/* ==========================================================================
   HERO
   ========================================================================== */
.hero{
  min-height:100vh;
  display:flex;
  align-items:center;
  padding-top:calc(var(--nav-h) + 40px);
  padding-bottom:60px;
  position:relative;
  overflow:hidden;
}
.hero-grid{
  display:grid;
  grid-template-columns:1.05fr .95fr;
  gap:64px;
  align-items:center;
}

.mini-titulo{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-family:var(--mono);
  font-size:.72rem;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--cyan);
  margin-bottom:22px;
}
.mini-titulo::before{
  content:"";
  width:8px; height:8px;
  background:var(--ok);
  border-radius:50%;
  box-shadow:0 0 0 3px rgba(87,193,127,.18);
}

.hero-texto h1{
  font-family:var(--display);
  font-weight:600;
  font-size:clamp(2.3rem, 4.6vw, 3.7rem);
  line-height:1.08;
  letter-spacing:-.015em;
  color:var(--ink);
  margin:0 0 26px;
  max-width:16ch;
}
.hero-texto h1 em{
  font-style:normal;
  color:var(--copper);
}
.hero-texto > p{
  color:var(--ink-muted);
  font-size:1.1rem;
  max-width:46ch;
  margin-bottom:38px;
}

.hero-botoes{ display:flex; gap:16px; flex-wrap:wrap; }

.btn-principal, .btn-secundario{
  font-family:var(--mono);
  font-size:.84rem;
  letter-spacing:.06em;
  text-decoration:none;
  padding:16px 28px;
  font-weight:600;
  display:inline-flex;
  align-items:center;
  gap:10px;
  clip-path: polygon(12px 0, 100% 0, 100% calc(100% - 12px), calc(100% - 12px) 100%, 0 100%, 0 12px);
  transition:transform .2s ease, background .2s ease, border-color .2s ease;
}
.btn-principal{ background:var(--copper); color:#1a0f04; }
.btn-principal:hover{ background:#f39a3d; transform:translateY(-2px); }
.btn-secundario{ background:transparent; color:var(--ink); border:1px solid var(--line-strong); }
.btn-secundario:hover{ border-color:var(--cyan); color:var(--cyan); transform:translateY(-2px); }

/* ---- hero visual: animated schematic + spec card ---- */
.hero-visual{ position:relative; }
.hero-esquema{ width:100%; height:auto; }
.tracado{
  fill:none;
  stroke:var(--cyan);
  stroke-width:1.4;
  stroke-linecap:round;
  opacity:.55;
}
.tracado-anim{
  stroke-dasharray:6 10;
  animation:fluxo 6s linear infinite;
}
@keyframes fluxo{ to{ stroke-dashoffset:-160; } }
.no{ fill:var(--bg-panel); stroke:var(--line-strong); stroke-width:1.2; }
.no-ativo{ fill:var(--copper); }
.pulso{ animation:pulso 2.6s ease-in-out infinite; transform-origin:center; }
@keyframes pulso{ 0%,100%{ opacity:.35; transform:scale(1); } 50%{ opacity:1; transform:scale(1.35); } }

.hero-ficha{
  position:absolute;
  bottom:-6px; left:-6px;
  background:rgba(10,24,38,.9);
  backdrop-filter:blur(8px);
  border:1px solid var(--line-strong);
  padding:20px 22px;
  width:min(272px, 78%);
}
.hero-ficha-titulo{
  font-family:var(--mono);
  font-size:.66rem;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--ink-faint);
  border-bottom:1px solid var(--line);
  padding-bottom:10px;
  margin-bottom:12px;
}
.hero-ficha ul{ display:flex; flex-direction:column; gap:9px; }
.hero-ficha li{
  display:flex;
  align-items:baseline;
  gap:9px;
  font-size:.84rem;
  color:var(--ink-muted);
}
.hero-ficha li b{
  font-family:var(--mono);
  color:var(--cyan);
  font-weight:600;
  font-size:.78rem;
  flex-shrink:0;
}

.scroll{
  position:absolute;
  left:50%; bottom:34px;
  transform:translateX(-50%);
  color:var(--ink-faint);
  font-size:1.1rem;
  animation:flutuar 2.4s ease-in-out infinite;
}
@keyframes flutuar{ 0%,100%{ transform:translate(-50%,0); } 50%{ transform:translate(-50%,8px); } }

/* ==========================================================================
   EMPRESA
   ========================================================================== */
#empresa > .container > p{
  color:var(--ink-muted);
  max-width:74ch;
  font-size:1.04rem;
  margin-bottom:52px;
}
.cards{
  display:grid;
  grid-template-columns:repeat(auto-fit, minmax(240px, 1fr));
  gap:1px;
  background:var(--line);
  border:1px solid var(--line);
}
.card{
  background:var(--bg-raised);
  padding:36px 32px;
  transition:background .25s ease, transform .25s ease;
}
.card i{
  font-size:1.3rem;
  color:var(--copper);
  margin-bottom:20px;
  display:block;
}
.card h3{
  font-family:var(--display);
  font-size:1.15rem;
  font-weight:600;
  margin:0 0 12px;
  color:var(--ink);
}
.card p{ color:var(--ink-muted); font-size:.95rem; }

/* ==========================================================================
   SERVIÇOS
   ========================================================================== */
#servicos{ background:var(--bg-raised); border-block:1px solid var(--line); }
.servicos-grid{
  display:grid;
  grid-template-columns:repeat(auto-fit, minmax(300px, 1fr));
  gap:1px;
  background:var(--line);
  border:1px solid var(--line);
}
.servico{
  background:var(--bg);
  padding:38px 34px;
  position:relative;
  transition:background .25s ease;
}
.servico:hover{ background:var(--bg-panel); }
.servico-topo{
  display:flex;
  align-items:center;
  justify-content:space-between;
  margin-bottom:24px;
}
.icone{
  width:46px; height:46px;
  display:flex; align-items:center; justify-content:center;
  background:var(--copper-soft);
  color:var(--copper);
  font-size:1.15rem;
}
.cod{
  font-family:var(--mono);
  font-size:.68rem;
  letter-spacing:.08em;
  color:var(--ink-faint);
  border:1px solid var(--line-strong);
  padding:4px 8px;
}
.servico h3{
  font-family:var(--display);
  font-size:1.14rem;
  font-weight:600;
  margin:0 0 10px;
}
.servico p{ color:var(--ink-muted); font-size:.94rem; }

/* ==========================================================================
   FICHA TÉCNICA (title-block style — "carimbo" de prancha)
   ========================================================================== */
#numeros{ padding:0; }
.carimbo{
  border:1px solid var(--line-strong);
  margin-top:0;
}
.carimbo-topo{
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding:16px 26px;
  border-bottom:1px solid var(--line-strong);
  font-family:var(--mono);
  font-size:.7rem;
  letter-spacing:.12em;
  text-transform:uppercase;
  color:var(--ink-faint);
  flex-wrap:wrap;
  gap:8px;
}
.carimbo-topo b{ color:var(--cyan); }
.carimbo-grid{
  display:grid;
  grid-template-columns:repeat(4, 1fr);
}
.campo{
  padding:30px 26px;
  border-right:1px solid var(--line);
}
.campo:last-child{ border-right:none; }
.campo b{
  display:block;
  font-family:var(--mono);
  font-size:.66rem;
  letter-spacing:.12em;
  text-transform:uppercase;
  color:var(--ink-faint);
  margin-bottom:12px;
}
.campo span{
  font-family:var(--display);
  font-size:1.7rem;
  font-weight:600;
  color:var(--ink);
}

/* ==========================================================================
   DIFERENCIAIS
   ========================================================================== */
.dif-grid{
  display:grid;
  grid-template-columns:repeat(auto-fit, minmax(250px, 1fr));
  gap:28px;
}
.dif{ display:flex; gap:18px; }
.dif-marca{
  width:34px; height:34px;
  flex-shrink:0;
  border:1px solid var(--cyan);
  color:var(--cyan);
  display:flex; align-items:center; justify-content:center;
  font-size:.9rem;
  margin-top:2px;
}
.dif h3{
  font-family:var(--display);
  font-size:1.05rem;
  font-weight:600;
  margin:0 0 8px;
}
.dif p{ color:var(--ink-muted); font-size:.93rem; }

/* ==========================================================================
   PORTFÓLIO
   ========================================================================== */
#portfolio{ background:var(--bg-raised); border-block:1px solid var(--line); }
.portfolio-grid{
  display:grid;
  grid-template-columns:repeat(auto-fit, minmax(300px, 1fr));
  gap:24px;
}
.projeto{
  position:relative;
  aspect-ratio:4/3;
  overflow:hidden;
  border:1px solid var(--line-strong);
}
.projeto-media{
  position:absolute; inset:0;
  background:linear-gradient(155deg, var(--bg-panel), #0a1826);
}
.projeto-media img{
  width:100%; height:100%; object-fit:cover;
  transition:transform .5s ease;
}
.projeto:hover .projeto-media img{ transform:scale(1.06); }
.projeto-media.sem-imagem{
  display:flex; align-items:center; justify-content:center;
}
.projeto-media.sem-imagem i{
  font-size:2.1rem;
  color:var(--line-strong);
}
.projeto::after{
  content:"";
  position:absolute; inset:0;
  background:linear-gradient(0deg, rgba(6,14,23,.92) 0%, rgba(6,14,23,.15) 55%, transparent 75%);
}
.legenda{
  position:absolute; left:0; right:0; bottom:0;
  padding:22px;
  z-index:2;
}
.legenda span{
  font-family:var(--mono);
  font-size:.66rem;
  letter-spacing:.1em;
  text-transform:uppercase;
  color:var(--copper);
}
.legenda h3{
  font-family:var(--display);
  font-size:1.1rem;
  font-weight:600;
  margin:6px 0 0;
  color:var(--ink);
}

/* ==========================================================================
   CTA
   ========================================================================== */
.cta{
  text-align:center;
  padding:110px 0;
}
.cta .folha{ justify-content:center; }
.cta h2{
  font-family:var(--display);
  font-size:clamp(1.8rem, 3.4vw, 2.6rem);
  font-weight:600;
  max-width:20ch;
  margin:0 auto 16px;
}
.cta p{ color:var(--ink-muted); max-width:48ch; margin:0 auto 36px; }

/* ==========================================================================
   CONTATO
   ========================================================================== */
#contato{ background:var(--bg-raised); border-top:1px solid var(--line); }
.contato-grid{
  display:grid;
  grid-template-columns:1fr 1.1fr;
  gap:70px;
}
.info-linha{
  display:flex;
  gap:16px;
  padding:18px 0;
  border-bottom:1px solid var(--line);
}
.info-linha:first-of-type{ border-top:1px solid var(--line); }
.info-linha i{
  color:var(--copper);
  font-size:1.05rem;
  width:22px;
  margin-top:3px;
}
.info-linha b{
  display:block;
  font-family:var(--mono);
  font-size:.66rem;
  letter-spacing:.1em;
  text-transform:uppercase;
  color:var(--ink-faint);
  margin-bottom:4px;
}
.info-linha span, .info-linha a{
  font-size:1rem;
  color:var(--ink);
  text-decoration:none;
}
.info-linha a:hover{ color:var(--cyan); }

form{ display:flex; flex-direction:column; gap:16px; }
.linha-dupla{ display:grid; grid-template-columns:1fr 1fr; gap:16px; }
.campo-form{ position:relative; }
.campo-form label{
  display:block;
  font-family:var(--mono);
  font-size:.68rem;
  letter-spacing:.1em;
  text-transform:uppercase;
  color:var(--ink-faint);
  margin-bottom:8px;
}
input, textarea{
  width:100%;
  background:var(--bg);
  border:1px solid var(--line-strong);
  color:var(--ink);
  padding:14px 16px;
  font-size:.95rem;
  transition:border-color .2s ease;
}
input:focus, textarea:focus{ border-color:var(--cyan); outline:none; }
textarea{ min-height:120px; resize:vertical; }
::placeholder{ color:var(--ink-faint); }

button[type="submit"]{
  align-self:flex-start;
  margin-top:6px;
  font-family:var(--mono);
  font-size:.84rem;
  letter-spacing:.08em;
  font-weight:600;
  color:#1a0f04;
  background:var(--copper);
  border:none;
  padding:16px 30px;
  clip-path: polygon(12px 0, 100% 0, 100% calc(100% - 12px), calc(100% - 12px) 100%, 0 100%, 0 12px);
  transition:background .2s ease, transform .2s ease;
}
button[type="submit"]:hover{ background:#f39a3d; transform:translateY(-2px); }
button[type="submit"]:disabled{ opacity:.6; cursor:default; transform:none; }

.form-status{
  font-family:var(--mono);
  font-size:.82rem;
  color:var(--ok);
  min-height:1.2em;
}

/* ==========================================================================
   FOOTER
   ========================================================================== */
footer{ background:#071019; border-top:1px solid var(--line); padding-top:70px; }
.footer-grid{
  display:grid;
  grid-template-columns:1.4fr 1fr 1fr;
  gap:52px;
  padding-bottom:50px;
}
.footer-marca{ display:flex; align-items:center; gap:12px; margin-bottom:18px; }
.footer-marca .logo-img{ height:38px; width:auto; }
.footer-marca .logo-fallback{ width:34px; height:34px; display:none; }
.footer-marca .marca-mark.sem-logo .logo-fallback{ display:block; }
.footer-marca strong{ font-family:var(--display); font-size:1.05rem; font-weight:700; }
.footer-grid > div > p{ color:var(--ink-muted); font-size:.92rem; max-width:34ch; }
.footer-grid h3{
  font-family:var(--mono);
  font-size:.7rem;
  letter-spacing:.12em;
  text-transform:uppercase;
  color:var(--ink-faint);
  margin-bottom:18px;
}
.footer-grid ul{ display:flex; flex-direction:column; gap:11px; }
.footer-grid a{ color:var(--ink-muted); text-decoration:none; font-size:.94rem; }
.footer-grid a:hover{ color:var(--cyan); }
.footer-grid p{ color:var(--ink-muted); font-size:.94rem; margin-bottom:8px; }

.copyright{
  border-top:1px solid var(--line);
  padding:22px 0;
  text-align:center;
}
.copyright p{
  font-family:var(--mono);
  font-size:.76rem;
  letter-spacing:.03em;
  color:var(--ink-faint);
}

/* ==========================================================================
   FLOATING BUTTONS
   ========================================================================== */
.whatsapp, #btnTopo{
  position:fixed;
  right:26px;
  width:54px; height:54px;
  border-radius:50%;
  display:flex; align-items:center; justify-content:center;
  z-index:900;
  box-shadow:0 10px 26px rgba(0,0,0,.4);
  transition:transform .2s ease, opacity .2s ease;
}
.whatsapp{
  bottom:26px;
  background:#25d366;
  color:#0a1a28;
  font-size:1.5rem;
  text-decoration:none;
}
.whatsapp:hover{ transform:translateY(-3px) scale(1.04); }

#btnTopo{
  bottom:94px;
  background:var(--bg-panel);
  border:1px solid var(--line-strong);
  color:var(--ink);
  font-size:1.1rem;
  display:none;
  opacity:0;
}
#btnTopo.visivel{ display:flex; opacity:1; }
#btnTopo:hover{ border-color:var(--cyan); color:var(--cyan); transform:translateY(-3px); }

/* ==========================================================================
   RESPONSIVE
   ========================================================================== */
@media (max-width:980px){
  .hero-grid{ grid-template-columns:1fr; }
  .hero-visual{ order:-1; max-width:420px; margin-inline:auto; }
  .contato-grid{ grid-template-columns:1fr; gap:48px; }
  .carimbo-grid{ grid-template-columns:repeat(2, 1fr); }
  .campo{ border-bottom:1px solid var(--line); }
  .footer-grid{ grid-template-columns:1fr 1fr; }
}

@media (max-width:768px){
  nav{
    position:fixed;
    top:var(--nav-h); left:0; right:0;
    background:rgba(7,16,26,.98);
    backdrop-filter:blur(14px);
    border-bottom:1px solid var(--line);
    padding:14px 0 20px;
    transform:translateY(-8px);
    opacity:0;
    pointer-events:none;
    transition:opacity .2s ease, transform .2s ease;
  }
  nav.aberto{ opacity:1; transform:none; pointer-events:auto; }
  nav ul{ flex-direction:column; align-items:stretch; padding:0 var(--edge); width:min(1180px,92%); margin-inline:auto; }
  nav a{ padding:14px 6px; border-bottom:1px solid var(--line); font-size:1rem; }
  .btn-topo{ display:none; }
  .hamburguer{ display:flex; }
  .footer-grid{ grid-template-columns:1fr; gap:36px; }
}

@media (max-width:560px){
  section{ padding:80px 0; }
  .linha-dupla{ grid-template-columns:1fr; }
  .carimbo-grid{ grid-template-columns:1fr 1fr; }
  .hero-botoes{ flex-direction:column; align-items:stretch; }
  .hero-ficha{ position:static; width:100%; margin-top:20px; }
}