/* ==========================================================================
   Mertek Engenharia Integrada — design tokens (tema escuro)
   Conceito: prancheta de desenho técnico. Grid de blueprint (traços claros
   sobre fundo escuro, como um blueprint de verdade), linhas de cota e um
   carimbo de projeto (title block) como elemento de assinatura.
   ========================================================================== */

:root{
  --ink:        #ECEBE8; /* texto principal — quase branco */
  --paper:      #1B1B1C; /* fundo da página */
  --paper-2:    #242426; /* superfície / cards */
  --deep:       #101011; /* superfície mais escura — footer, carimbo */
  --orange:     #F56900; /* Orange 02 — oficial Mertek */
  --orange-dark:#FF8A33; /* hover, mais claro sobre fundo escuro */
  --charcoal:   #C7C8C9; /* títulos e texto secundário — cinza claro */
  --charcoal-2: #9A9C9D; /* Grey 01 (adaptado p/ tema escuro) */
  --steel:      #838587; /* Grey 04 — oficial Mertek, textos mudos */
  --steel-line: #333335; /* divisórias e bordas */
  --grid-line:  rgba(255,255,255,.07); /* traços do blueprint */

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

  --radius: 4px;
  --wrap: 1180px;
}

*, *::before, *::after{ box-sizing: border-box; }
html{ scroll-behavior: smooth; }
body{
  margin:0;
  font-family: var(--font-body);
  color: var(--ink);
  background: var(--paper);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  opacity: 0;
  transition: opacity .32s ease;
  position: relative;
}
body.page-ready{ opacity:1; }
body.page-leaving{ opacity:0; transition: opacity .26s ease; }
body.intro-active{ overflow:hidden; height:100vh; }

/* ---------- degradê contínuo (conecta as seções, de cima a baixo) ---------- */
.site-gradient{
  position:absolute; inset:0; z-index:-2;
  background-image:
    radial-gradient(circle at 100% 0%, rgba(245,105,0,.09), transparent 32%),
    radial-gradient(circle at 6% 46%, rgba(245,105,0,.05), transparent 30%),
    radial-gradient(circle at 96% 78%, rgba(245,105,0,.06), transparent 28%),
    linear-gradient(180deg,
      rgba(65,67,69,.4) 0%,
      rgba(36,36,38,.35) 14%,
      rgba(16,16,17,.2) 26%,
      rgba(65,67,69,.28) 42%,
      rgba(36,36,38,.32) 58%,
      rgba(65,67,69,.24) 72%,
      rgba(36,36,38,.4) 86%,
      rgba(16,16,17,.6) 100%
    );
}

/* ---------- fundo dinâmico (blueprint contínuo abaixo do topo) ---------- */
.site-grid{
  position:absolute; inset:0; z-index:-1;
  background-image:
    repeating-linear-gradient(0deg, var(--grid-line) 0, var(--grid-line) 1px, transparent 1px, transparent 42px),
    repeating-linear-gradient(90deg, var(--grid-line) 0, var(--grid-line) 1px, transparent 1px, transparent 42px);
  background-size: 42px 42px;
  animation: grid-drift 110s linear infinite;
  --grid-start: 760px;
  mask-image: linear-gradient(to bottom, transparent 0, transparent var(--grid-start), black calc(var(--grid-start) + 140px), black 100%);
  -webkit-mask-image: linear-gradient(to bottom, transparent 0, transparent var(--grid-start), black calc(var(--grid-start) + 140px), black 100%);
}
@keyframes grid-drift{
  from{ background-position: 0 0; }
  to{ background-position: 420px 420px; }
}
@media (prefers-reduced-motion: reduce){
  .site-grid{ animation:none; }
}

@media (prefers-reduced-motion: reduce){
  body{ transition:none; opacity:1; }
}

/* ---------- intro / abertura ---------- */
.intro{
  position:fixed; inset:0; z-index:9999;
  background: var(--paper);
  display:flex; align-items:center; justify-content:center; flex-direction:column;
}
.intro.intro-fading{
  animation: intro-out 1s cubic-bezier(.4,0,.2,1) forwards;
}
.intro-grid{
  position:absolute; inset:0;
  background-image:
    repeating-linear-gradient(0deg, var(--grid-line) 0, var(--grid-line) 1px, transparent 1px, transparent 42px),
    repeating-linear-gradient(90deg, var(--grid-line) 0, var(--grid-line) 1px, transparent 1px, transparent 42px);
  mask-image: radial-gradient(circle at 50% 50%, black 0%, transparent 75%);
}
.intro-mark-wrap{ position:relative; text-align:center; }
.intro-mark{
  width: 120px; height:auto; margin:0 auto;
  clip-path: inset(0 100% 0 0);
  opacity:0; transform: scale(.92);
  animation:
    intro-reveal .55s cubic-bezier(.65,0,.35,1) forwards .15s,
    intro-fade-in .3s ease forwards .15s;
}
@keyframes intro-reveal{ to{ clip-path: inset(0 0 0 0); } }
@keyframes intro-fade-in{ to{ opacity:1; transform: scale(1); } }
@keyframes intro-out{
  0%{ opacity:1; filter: blur(0); transform: scale(1); }
  100%{ opacity:0; filter: blur(16px); transform: scale(1.035); visibility:hidden; pointer-events:none; }
}

@media (prefers-reduced-motion: reduce){
  .intro.intro-fading{ animation: intro-out .01s linear forwards; }
  .intro-mark{ animation:none; opacity:1; clip-path:none; transform:none; }
}
img{ max-width:100%; display:block; }
a{ color: inherit; text-decoration:none; }
h1,h2,h3,h4{ font-family: var(--font-display); font-weight:600; line-height:1.15; margin:0 0 .5em; }
p{ margin:0 0 1em; }
ul{ margin:0; padding:0; list-style:none; }

.wrap{ max-width: var(--wrap); margin:0 auto; padding:0 32px; }

@media (max-width: 640px){
  .wrap{ padding:0 20px; }
}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex; align-items:center; justify-content:center;
  padding: 13px 26px;
  font-family: var(--font-body); font-weight:600; font-size:15px;
  border-radius: var(--radius);
  border: 1.5px solid transparent;
  cursor:pointer;
  transition: background .15s ease, color .15s ease, border-color .15s ease;
  white-space: nowrap;
}
.btn-primary{ background: var(--orange); color:#fff; }
.btn-primary:hover{ background: var(--orange-dark); }
.btn-outline{ border-color: var(--charcoal); color: var(--charcoal); }
.btn-outline:hover{ background: var(--ink); border-color: var(--ink); color: var(--paper); }

/* ---------- header ---------- */
.site-header{
  position: sticky; top:0; z-index:100;
  background: rgba(27,27,28,.88);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid var(--steel-line);
}
.header-inner{
  display:flex; align-items:center; gap: 28px;
  height: 64px;
}
.brand-logo{ height: 28px; width:auto; }
.main-nav{ display:flex; gap: 28px; margin-left: auto; }
.main-nav a{
  font-size:15px; font-weight:500; color: var(--charcoal);
  padding: 6px 2px; border-bottom: 2px solid transparent;
  transition: border-color .15s ease, color .15s ease;
}
.main-nav a:hover{ color: var(--orange); border-color: var(--orange); }
.header-cta{ padding: 10px 20px; font-size:14px; }
.nav-toggle{
  display:none; flex-direction:column; justify-content:center; gap:5px;
  width:36px; height:36px; background:none; border:none; cursor:pointer; padding:0;
}
.nav-toggle span{ height:2px; width:100%; background: var(--ink); border-radius:2px; }

@media (max-width: 860px){
  .main-nav{
    position:absolute; top:64px; left:0; right:0;
    background: var(--paper-2);
    flex-direction:column; gap:0;
    border-bottom:1px solid var(--steel-line);
    max-height:0; overflow:hidden;
    transition: max-height .25s ease;
  }
  .main-nav.open{ max-height:260px; }
  .main-nav a{ padding: 16px 20px; border-bottom:1px solid var(--steel-line); }
  .header-cta{ display:none; }
  .nav-toggle{ display:flex; margin-left:auto; }
}

/* ---------- hero ---------- */
.hero{
  position:relative;
  overflow:hidden;
  padding: 36px 0 96px;
  border-bottom: 1px solid var(--steel-line);
}
.blueprint-grid{
  position:absolute; inset:0;
  background-image:
    repeating-linear-gradient(0deg, var(--grid-line) 0, var(--grid-line) 1px, transparent 1px, transparent 40px),
    repeating-linear-gradient(90deg, var(--grid-line) 0, var(--grid-line) 1px, transparent 1px, transparent 40px);
  mask-image: linear-gradient(to bottom, black, transparent 92%);
}
.hero-inner{
  position:relative;
  display:flex; align-items:flex-end; justify-content:space-between; gap:48px;
}
.hero-content{ max-width: 680px; flex: 1 1 auto; min-width:0; }
.eyebrow{
  display:flex; align-items:center; gap:10px;
  font-family: var(--font-mono); font-size:13px; letter-spacing:.04em;
  color: var(--orange); text-transform: uppercase;
  margin-bottom: 22px;
}
.eyebrow-tick{ width:22px; height:1.5px; background: var(--orange); }
.hero h1{ font-size: clamp(34px, 5vw, 54px); color: var(--ink); margin-bottom:.4em; }
.hero-lead{ font-size:18px; color: var(--charcoal); max-width: 540px; }
.hero-actions{ display:flex; gap:16px; flex-wrap:wrap; margin-top: 12px; }

/* --- signature element: technical drawing title block ---
   Fica como um "carimbo" de papel claro sobre o fundo escuro do hero —
   cores fixas, independentes do tema, para manter o contraste. --- */
.title-block{
  flex: 0 0 300px;
  width: 300px;
  border: 1px solid #E4E5E6;
  background: rgba(250,249,247,.97);
  font-family: var(--font-mono);
  font-size:11px;
}
.tb-row.tb-head{
  background: var(--deep); color:#fff;
  padding: 8px 10px; letter-spacing:.03em;
}
.tb-grid{ display:grid; grid-template-columns: 1fr 1fr; }
.tb-cell{
  display:flex; flex-direction:column; gap:2px;
  padding: 8px 10px; border-top: 1px solid #E4E5E6; border-left: 1px solid #E4E5E6;
}
.tb-cell:nth-child(odd){ border-left:none; }
.tb-label{ color: #838587; text-transform:uppercase; font-size:10px; }
.tb-value{ color: #1B1B1C; font-weight:500; }

@media (max-width: 900px){
  .hero-inner{ flex-direction:column; align-items:stretch; gap:0; }
  .title-block{ width:100%; max-width:300px; margin-top: 40px; }
  .hero{ padding-bottom: 76px; }
}

/* ---------- indicadores (dimension-line style, agora dentro do hero) ---------- */
.hero-stats{
  margin-top: 32px; padding-top: 24px;
  border-top: 1px solid var(--steel-line);
  max-width: 640px;
}
.stats-grid{
  display:grid; grid-template-columns: repeat(4, 1fr); gap: 28px;
}
.stat{ display:flex; flex-direction:column; align-items:flex-start; text-align:left; gap:6px; }
.dim-line{
  width:100%; max-width:100px; height:1px; background: var(--steel);
  position:relative; margin-bottom:8px;
}
.dim-line .tick{
  position:absolute; top:-4px; width:1px; height:9px; background: var(--steel);
}
.dim-line .tick:first-child{ left:0; }
.dim-line .tick:last-child{ right:0; }
.stat-number{
  font-family: var(--font-mono); font-weight:500; font-size:32px; color: var(--orange);
  font-variant-numeric: tabular-nums;
}
.stat-number small{ font-size:19px; }
.stat-label{ font-family: var(--font-mono); font-size:11.5px; color: var(--charcoal); text-transform:uppercase; letter-spacing:.03em; }

@media (max-width: 640px){
  .stats-grid{ grid-template-columns: repeat(2,1fr); row-gap: 32px; }
}

/* ---------- section commons ---------- */
section{ padding: 96px 0; }
.section-eyebrow{
  font-family: var(--font-mono); font-size:13px; text-transform:uppercase; letter-spacing:.04em;
  color: var(--orange); margin-bottom: 12px;
}
.section-lead{ font-size:17px; color: var(--charcoal); max-width:600px; }
h2{ font-size: clamp(26px,3.4vw,36px); color: var(--ink); }

.tech-strip{
  display:flex; align-items:center; gap:10px; flex-wrap:wrap;
  margin-top:16px;
  font-family: var(--font-mono); font-size:12.5px; letter-spacing:.02em;
  color: var(--steel); text-transform:uppercase;
}
.tech-strip .tech-dot{ width:4px; height:4px; border-radius:50%; background: var(--orange); }

/* ---------- sobre ---------- */
.sobre-grid{ display:grid; grid-template-columns: 1.1fr .9fr; gap: 64px; align-items:start; }
.sobre-text p:not(.section-eyebrow){ font-size:16.5px; line-height:1.75; }
.sobre-text .callout{
  border-left: 3px solid var(--orange);
  padding: 4px 0 4px 20px;
  color: var(--charcoal);
  font-size:17px;
}
.sobre-values{ display:flex; flex-direction:column; gap: 24px; }
.value-card{
  background: var(--paper-2); border:1px solid var(--steel-line); border-radius: var(--radius);
  padding: 28px;
}
.value-icon{ height:40px; width:auto; margin-bottom:14px; }
.value-card h3{ font-size:19px; margin-bottom:.4em; color: var(--ink); }
.value-card ul li{ position:relative; padding-left:16px; margin-bottom:6px; color: var(--charcoal); }
.value-card ul li::before{ content:''; position:absolute; left:0; top:9px; width:6px; height:1.5px; background: var(--orange); }

@media (max-width: 900px){
  .sobre-grid{ grid-template-columns: 1fr; }
}

/* ---------- serviços ---------- */
.servicos{ border-top:1px solid var(--steel-line); border-bottom:1px solid var(--steel-line); }
.servicos-grid{
  display:grid; grid-template-columns: repeat(3,1fr); gap: 28px; margin-top: 48px;
}
.servico-card{
  border: 1px solid var(--steel-line); border-radius: var(--radius);
  padding: 32px 28px; background: var(--paper-2);
  transition: border-color .15s ease, transform .15s ease;
}
.servico-card:hover{ border-color: var(--orange); transform: translateY(-3px); }
.servico-icon{ height:44px; width:auto; margin-bottom:18px; }
.servico-card h3{ font-size:19px; margin-bottom:.5em; color: var(--ink); }
.servico-card p{ color: var(--charcoal); font-size:15px; margin:0; }

@media (max-width: 900px){
  .servicos-grid{ grid-template-columns:1fr; }
}

/* ---------- obras ---------- */
.obras{ }
.obras-header{ display:flex; justify-content:space-between; align-items:flex-end; gap:24px; }
.obras-icon{ height:52px; width:auto; opacity:.9; }
.obras-grid{
  display:grid; grid-template-columns: repeat(2,1fr); gap: 28px; margin-top: 44px;
}
.obra-card{ margin:0; }
.obra-thumb{
  aspect-ratio: 20/9; border-radius: var(--radius);
  background: var(--steel-line);
  position:relative; overflow:hidden;
}
.obra-thumb::after{
  content:''; position:absolute; inset:0;
  background-image: repeating-linear-gradient(45deg, rgba(0,0,0,.14) 0 10px, transparent 10px 20px);
}
.obra-thumb.has-photo{ background: transparent; }
.obra-thumb.has-photo::after{ content:none; }
.obra-thumb.has-photo img{
  width:100%; height:100%; object-fit:contain; display:block;
  filter: grayscale(1) contrast(1.05);
  transition: filter .35s ease, transform .35s ease;
}
.obra-card:hover .obra-thumb.has-photo img{
  filter: grayscale(0) contrast(1.05);
  transform: scale(1.03);
}
.ph-1{ background: #4A4128; } .ph-2{ background: #40381F; }
.ph-3{ background: #362E19; } .ph-4{ background: #453C22; }
.obra-card figcaption{ margin-top:14px; }
.obra-title{
  font-family: var(--font-display); font-weight:600; font-size:17px;
  color: var(--orange); margin:0 0 10px;
}
.obra-meta{ display:flex; flex-direction:column; gap:7px; }
.obra-meta li{
  display:flex; align-items:center; gap:9px;
  font-size:13.5px; color: var(--charcoal);
}
.obra-meta svg{
  flex:none; width:16px; height:16px;
  fill:none; stroke: var(--orange); stroke-width:1.6;
  stroke-linecap:round; stroke-linejoin:round;
}

@media (max-width: 900px){
  .obras-header{ flex-direction:column; align-items:flex-start; }
}
@media (max-width: 640px){
  .obras-grid{ grid-template-columns: 1fr; }
}

/* ---------- contato ---------- */
.contato{ border-top:1px solid var(--steel-line); }
.contato-grid{ display:grid; grid-template-columns: .9fr 1.1fr; gap:64px; }
.contato-icon{ height:44px; margin-bottom:18px; }
.contato-lista{ margin-top: 28px; display:flex; flex-direction:column; gap:20px; }
.contato-lista li{ display:flex; align-items:flex-start; gap:14px; }
.contato-item-icon{
  flex:none; width:20px; height:20px; margin-top:2px;
  fill:none; stroke: var(--orange); stroke-width:1.6;
  stroke-linecap:round; stroke-linejoin:round;
}
.contato-label{
  display:block; font-family: var(--font-mono); font-size:11px; text-transform:uppercase;
  color: var(--steel); margin-bottom:4px; letter-spacing:.03em;
}
.contato-lista a:hover{ color: var(--orange); }

.contato-form{ display:flex; flex-direction:column; gap:18px; }
.form-row{ display:grid; grid-template-columns: 1fr 1fr; gap:18px; }
.contato-form label{ display:flex; flex-direction:column; gap:6px; font-size:13px; color: var(--charcoal); font-weight:500; }
.contato-form input, .contato-form textarea{
  font-family: var(--font-body); font-size:15px;
  padding: 12px 14px; border:1px solid var(--steel-line); border-radius: var(--radius);
  background: var(--paper-2); color: var(--ink); resize:vertical;
}
.contato-form input:focus, .contato-form textarea:focus{
  outline:none; border-color: var(--orange);
}
.form-submit{ align-self:flex-start; margin-top:6px; }

@media (max-width: 860px){
  .contato-grid{ grid-template-columns:1fr; }
  .form-row{ grid-template-columns:1fr; }
}

/* ---------- footer ---------- */
.site-footer{ color:#fff; padding-top: 64px; }
.footer-inner{ display:grid; grid-template-columns: 1.4fr 1fr 1fr; gap:40px; padding-bottom: 40px; }
.footer-logo{ height:30px; margin-bottom:16px; }
.footer-brand p{ color: #B9BBBC; font-size:14px; max-width: 320px; }
.footer-col h4{ font-family: var(--font-mono); font-size:12px; text-transform:uppercase; letter-spacing:.04em; color: var(--orange); margin-bottom:14px; }
.footer-col a{ display:block; color:#C8CACB; font-size:14px; margin-bottom:10px; }
.footer-col a:hover{ color: #fff; }
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.1);
  padding: 20px 0; font-size:13px; color:#8C8E8F;
}

@media (max-width: 700px){
  .footer-inner{ grid-template-columns:1fr; }
}

/* ---------- whatsapp float ---------- */
.whatsapp-float{
  position:fixed; right:22px; bottom:22px; z-index: 200;
  width:56px; height:56px; border-radius:50%;
  background:#25D366; color:#fff;
  display:flex; align-items:center; justify-content:center;
  box-shadow: 0 6px 20px rgba(0,0,0,.35);
  transition: transform .15s ease;
}
.whatsapp-float:hover{ transform: scale(1.06); }

/* ---------- aviso de cookies ---------- */
.cookie-banner{
  position:fixed; left:22px; bottom:22px; z-index: 300;
  width: 380px; max-width: calc(100vw - 44px);
  background: var(--paper-2);
  border: 1px solid var(--steel-line);
  border-radius: var(--radius);
  box-shadow: 0 12px 32px rgba(0,0,0,.4);
  animation: cookie-in .35s ease forwards;
}
.cookie-banner[hidden]{ display:none; }
.cookie-inner{ padding: 22px 22px 18px; }
.cookie-title{
  display:flex; align-items:center; gap:10px;
  font-family: var(--font-display); font-weight:600; font-size:15px;
  color: var(--ink); margin:0 0 10px;
}
.cookie-tick{ width:16px; height:1.5px; background: var(--orange); flex:none; }
.cookie-text{ font-size:13.5px; color: var(--charcoal); margin:0 0 12px; line-height:1.55; }
.cookie-links{
  display:flex; align-items:center; gap:8px;
  font-family: var(--font-mono); font-size:11.5px;
  color: var(--steel); margin:0 0 18px;
}
.cookie-links a{ color: var(--steel); border-bottom:1px solid var(--steel-line); }
.cookie-links a:hover{ color: var(--orange); border-color: var(--orange); }
.cookie-actions{ display:flex; align-items:center; gap:10px; flex-wrap:wrap; }
.cookie-option{
  display:flex; align-items:flex-start; justify-content:space-between; gap:14px;
  padding: 12px 0; border-bottom: 1px solid var(--steel-line);
}
.cookie-option-title{ display:block; font-size:13.5px; font-weight:600; color: var(--ink); }
.cookie-option-desc{ display:block; font-size:12px; color: var(--charcoal); margin-top:2px; }
.cookie-option input[type="checkbox"]{
  flex:none; width:18px; height:18px; margin-top:2px;
  accent-color: var(--orange); cursor:pointer;
}
.cookie-option input[disabled]{ cursor:default; opacity:.6; }
.cookie-link-btn{
  background:none; border:none; padding:0; cursor:pointer;
  font-family: var(--font-body); font-size:13.5px; font-weight:600;
  color: var(--charcoal); text-decoration: underline; text-underline-offset:3px;
  margin-right:auto;
}
.cookie-link-btn:hover{ color: var(--ink); }
.btn-sm{ padding: 9px 18px; font-size:13.5px; }

@keyframes cookie-in{
  from{ opacity:0; transform: translateY(16px); }
  to{ opacity:1; transform: translateY(0); }
}

@media (max-width: 480px){
  .cookie-banner{ left:12px; right:12px; bottom:12px; width:auto; }
  body.cookie-visible .whatsapp-float{ bottom: 210px; }
}
.whatsapp-float{ transition: transform .15s ease, bottom .2s ease; }

@media (prefers-reduced-motion: reduce){
  .cookie-banner{ animation:none; }
}

/* ---------- reduced motion ---------- */
@media (prefers-reduced-motion: reduce){
  html{ scroll-behavior:auto; }
  *{ transition:none !important; }
}