/* ============================================================
   ARKAD ENERGIA — Design System v2
   Premium engineering / infrastructure identity.
   Palette: near-black, white, light gray, single green accent.
   ============================================================ */

:root{
  --green:#3C8B3F;
  --green-dark:#245C27;

  --ink:#0B0D10;
  --ink-2:#14171B;
  --ink-3:#1C2025;
  --paper:#ffffff;
  --paper-2:#F4F5F6;
  --paper-3:#ECEDEE;

  --text:#14171B;
  --text-soft:#5B6167;
  --text-onDark:#F2F3F4;
  --text-onDark-soft:#9AA0A6;

  --line:#E3E5E7;
  --line-dark:rgba(255,255,255,.12);

  --shadow-sm:0 2px 10px rgba(10,15,10,.05);
  --shadow-md:0 16px 40px rgba(10,15,10,.10);
  --shadow-lg:0 30px 70px rgba(10,15,10,.18);

  --r-xs:2px; --r-sm:4px; --r-md:6px;
  --container:1240px;
  --ease:cubic-bezier(.22,.61,.36,1);
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:"Inter",system-ui,-apple-system,Segoe UI,Roboto,sans-serif;
  color:var(--text);
  background:var(--paper);
  line-height:1.65;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
  font-weight:400;
}
h1,h2,h3,h4,h5{font-family:"Sora",sans-serif;line-height:1.08;margin:0;letter-spacing:-.02em;color:var(--text);font-weight:600}
p{margin:0}
a{color:inherit;text-decoration:none}
img,svg{display:block;max-width:100%}
ul{margin:0;padding:0;list-style:none}
.ital{font-style:italic;font-weight:400;color:var(--text-soft)}
h1 .ital,h2 .ital{color:inherit;opacity:.62}

.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 32px}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;gap:.6em;justify-content:center;
  padding:16px 32px;border-radius:var(--r-xs);font-weight:600;font-size:14.5px;
  cursor:pointer;border:1px solid transparent;transition:.3s var(--ease);
  font-family:"Sora",sans-serif;letter-spacing:.01em;white-space:nowrap;
  text-transform:uppercase;font-size:13px;letter-spacing:.06em;
}
.btn-primary{background:var(--green);color:#fff}
.btn-primary:hover{background:var(--green-dark);transform:translateY(-1px)}
.btn-ghost{background:transparent;color:var(--text);border-color:var(--line)}
.btn-ghost:hover{border-color:var(--text);background:var(--paper-2)}
.btn-block{width:100%}
.btn-sm{padding:12px 22px;font-size:11.5px}

/* ============================================================
   HEADER
   ============================================================ */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:100;
  transition:.35s var(--ease);
  background:transparent;
}
.site-header.scrolled{
  background:rgba(11,13,16,.92);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  box-shadow:0 1px 0 var(--line-dark);
}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:88px}

.brand{display:flex;align-items:center;gap:12px}
.brand-word{font-family:"Sora",sans-serif;font-size:16px;line-height:1;letter-spacing:.1em;font-weight:700;color:#fff}
.brand-word em{font-style:normal;font-weight:400;color:var(--text-onDark-soft);letter-spacing:.1em}

.nav{display:flex;align-items:center;gap:8px}
.nav>a{
  padding:10px 18px;font-size:13px;font-weight:500;letter-spacing:.03em;
  color:rgba(255,255,255,.78);transition:.2s var(--ease);
}
.nav>a:hover{color:#fff}
.nav-cta{
  border:1px solid rgba(255,255,255,.3);border-radius:var(--r-xs);
  color:#fff!important;font-weight:600;margin-left:8px;
  text-transform:uppercase;font-size:11.5px;letter-spacing:.06em;padding:11px 20px;
}
.nav-cta:hover{background:var(--green);border-color:var(--green)}

.nav-toggle{display:none;flex-direction:column;gap:5px;background:none;border:0;cursor:pointer;padding:8px}
.nav-toggle span{width:24px;height:1.5px;background:#fff;border-radius:2px;transition:.3s var(--ease)}

/* ============================================================
   HERO
   ============================================================ */
.hero{position:relative;min-height:100vh;display:flex;align-items:flex-end;color:#fff;overflow:hidden}
.hero-media{position:absolute;inset:0;z-index:0}
.hero-media img{width:100%;height:100%;object-fit:cover;transform:scale(1.06)}
.hero-scrim{
  position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(11,13,16,.35) 0%,rgba(11,13,16,.35) 40%,rgba(11,13,16,.92) 100%),
             linear-gradient(90deg,rgba(11,13,16,.55) 0%,transparent 55%);
}
.hero-inner{position:relative;z-index:2;padding-bottom:120px;max-width:900px}

.eyebrow{
  display:inline-block;font-family:"Sora",sans-serif;font-size:12px;font-weight:600;
  letter-spacing:.16em;text-transform:uppercase;color:var(--text-onDark-soft);
  margin-bottom:28px;padding-bottom:14px;border-bottom:1px solid var(--line-dark);
}
.hero h1{font-size:clamp(38px,6.4vw,84px);font-weight:600;color:#fff;letter-spacing:-.03em}
.hero-lead{margin-top:28px;font-size:clamp(16px,1.5vw,20px);color:rgba(255,255,255,.82);max-width:620px;font-weight:300}
.hero-actions{display:flex;gap:16px;margin-top:44px;flex-wrap:wrap}
.hero .btn-ghost{color:#fff;border-color:rgba(255,255,255,.35)}
.hero .btn-ghost:hover{border-color:#fff;background:rgba(255,255,255,.08)}

.hero-scroll{position:absolute;bottom:36px;left:50%;transform:translateX(-50%);z-index:2}
.hero-scroll span{
  display:block;width:1px;height:44px;background:linear-gradient(rgba(255,255,255,.7),transparent);
  animation:scrollLine 1.8s ease-in-out infinite;
}
@keyframes scrollLine{0%{opacity:0;transform:scaleY(0)}30%{opacity:1;transform:scaleY(1)}100%{opacity:0;transform:scaleY(1)}}

/* ============================================================
   INDICATORS
   ============================================================ */
.indicators{background:var(--ink);padding:64px 0;border-bottom:1px solid var(--line-dark)}
.indicators-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:40px}
.ind-item{border-left:1px solid var(--line-dark);padding-left:24px}
.ind-num,.ind-num-text{
  display:block;font-family:"Sora",sans-serif;font-weight:300;font-size:clamp(30px,3.2vw,46px);
  color:#fff;letter-spacing:-.02em;line-height:1;
}
.ind-num-text{font-size:clamp(24px,2.4vw,34px)}
.ind-label{display:block;margin-top:12px;font-size:13px;color:var(--text-onDark-soft);line-height:1.5;max-width:220px}

/* ============================================================
   SECTIONS generic
   ============================================================ */
.section{padding:140px 0}
.section-alt{background:var(--paper-2)}
.section-tag{
  display:inline-block;font-family:"Sora",sans-serif;font-size:11.5px;font-weight:700;
  letter-spacing:.16em;text-transform:uppercase;color:var(--green);margin-bottom:22px;
}
.section-tag.light{color:#8CC98F}
.section-head{max-width:760px;margin:0 0 72px}
.section-head h2{font-size:clamp(30px,4vw,52px);font-weight:600}
.light-h{color:#fff}
.section-sub{margin-top:20px;font-size:18px;color:var(--text-soft);font-weight:300;max-width:620px}

.two-col{display:grid;grid-template-columns:1fr 1fr;gap:90px;align-items:center}
.two-col.reverse .col-copy{order:2}
.col-copy p{margin-top:22px;color:var(--text-soft);font-size:16.5px;font-weight:300;max-width:520px}
.col-copy h2{margin-top:10px}
.col-media img{width:100%;aspect-ratio:4/5;object-fit:cover;border-radius:var(--r-xs)}
.pull-quote{
  margin:36px 0 0;padding-top:24px;border-top:1px solid var(--line);
  font-family:"Sora",sans-serif;font-style:italic;font-size:21px;font-weight:400;color:var(--text);
}

.state-list{margin-top:32px;display:flex;flex-wrap:wrap;gap:10px 0}
.state-list li{
  font-size:13px;font-weight:600;letter-spacing:.03em;color:var(--text-soft);
  padding:8px 16px 8px 0;margin-right:16px;border-right:1px solid var(--line);
}
.state-list li:last-child{border-right:0}

/* ============================================================
   SERVIÇOS
   ============================================================ */
.services-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line)}
.scard{background:var(--paper);display:flex;flex-direction:column;transition:.4s var(--ease)}
.scard-media{aspect-ratio:4/3;overflow:hidden}
.scard-media img{width:100%;height:100%;object-fit:cover;transition:transform .6s var(--ease);filter:grayscale(.15)}
.scard:hover .scard-media img{transform:scale(1.06);filter:grayscale(0)}
.scard-body{padding:30px 26px 32px;flex:1;display:flex;flex-direction:column}
.scard h3{font-size:19px;margin-bottom:12px;font-weight:600}
.scard p{color:var(--text-soft);font-size:14.5px;font-weight:300;flex:1}
.scard-link{
  margin-top:20px;display:inline-flex;align-items:center;gap:.5em;font-size:12.5px;font-weight:700;
  letter-spacing:.04em;text-transform:uppercase;color:var(--text);
}
.scard-link span{transition:transform .25s var(--ease)}
.scard:hover .scard-link span{transform:translateX(4px)}

/* ============================================================
   GRANDES OBRAS
   ============================================================ */
.obras{background:var(--ink);color:#fff}
.obras .section-head{margin-bottom:100px}
.obra-panel{
  position:relative;display:grid;grid-template-columns:1.3fr 1fr;
  min-height:82vh;margin-bottom:2px;
}
.obra-panel.reverse{grid-template-columns:1fr 1.3fr}
.obra-panel.reverse .obra-media{order:2}
.obra-panel.reverse .obra-info{order:1}
.obra-media{position:relative;overflow:hidden}
.obra-media img{
  position:absolute;inset:0;width:100%;height:120%;object-fit:cover;
  transform:translateY(0);transition:transform .1s linear;
}
.obra-info{
  display:flex;flex-direction:column;justify-content:center;
  padding:60px 64px;background:var(--ink-2);
}
.obra-cat{font-family:"Sora",sans-serif;font-size:11.5px;font-weight:700;letter-spacing:.14em;text-transform:uppercase;color:#8CC98F;margin-bottom:20px}
.obra-info h3{font-size:clamp(26px,2.6vw,38px);color:#fff;margin-bottom:12px}
.obra-loc{font-size:13.5px;color:var(--text-onDark-soft);letter-spacing:.02em}
.obra-info p{margin-top:24px;color:rgba(255,255,255,.72);font-size:15px;font-weight:300;max-width:400px}
.obra-stat{
  margin-top:32px;display:inline-block;font-family:"Sora",sans-serif;font-size:28px;font-weight:300;
  color:#fff;padding-top:20px;border-top:1px solid var(--line-dark);width:fit-content;
}

/* ============================================================
   GALERIA
   ============================================================ */
.gallery-grid{display:grid;grid-template-columns:repeat(4,1fr);grid-auto-rows:220px;gap:4px}
.g-item{overflow:hidden;position:relative}
.g-item img{width:100%;height:100%;object-fit:cover;transition:transform .6s var(--ease),filter .4s var(--ease);filter:grayscale(.25)}
.g-item:hover img{transform:scale(1.05);filter:grayscale(0)}
.g-tall{grid-row:span 2}
.g-wide{grid-column:span 2}

/* ============================================================
   MARQUEE / CLIENTES
   ============================================================ */
.clients-section{padding-bottom:80px}
.marquee{overflow:hidden;mask-image:linear-gradient(90deg,transparent,#000 8%,#000 92%,transparent);
  -webkit-mask-image:linear-gradient(90deg,transparent,#000 8%,#000 92%,transparent);border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:36px 0}
.marquee-track{display:flex;gap:64px;width:max-content;animation:marquee 46s linear infinite}
.marquee-track span{font-family:"Sora",sans-serif;font-weight:600;font-size:17px;color:var(--text-soft);white-space:nowrap;letter-spacing:.01em;opacity:.75}
@keyframes marquee{to{transform:translateX(-50%)}}

/* ============================================================
   PARCEIROS
   ============================================================ */
.partners-grid{display:flex;flex-wrap:wrap;gap:20px}
.partners-grid span{
  font-family:"Sora",sans-serif;font-weight:600;font-size:15px;color:var(--text-soft);
  border:1px solid var(--line);padding:16px 26px;border-radius:var(--r-xs);letter-spacing:.02em;
  transition:.25s var(--ease);
}
.partners-grid span:hover{border-color:var(--text);color:var(--text)}

/* ============================================================
   CTA FINAL
   ============================================================ */
.cta-final{position:relative;min-height:70vh;display:flex;align-items:center;justify-content:center;color:#fff;overflow:hidden}
.cta-media{position:absolute;inset:0;z-index:0}
.cta-media img{width:100%;height:100%;object-fit:cover}
.cta-inner{position:relative;z-index:2;text-align:center}
.cta-final h2{font-size:clamp(30px,5vw,58px);color:#fff;font-weight:600;max-width:800px;margin:0 auto 44px}

/* ============================================================
   CONTATO
   ============================================================ */
.contact{background:var(--paper-2)}
.contact-inner{display:grid;grid-template-columns:1fr 1fr;gap:80px;align-items:start}
.contact-copy h2{font-size:clamp(28px,3.4vw,42px);margin-top:10px}
.contact-copy p{margin-top:22px;color:var(--text-soft);font-size:16.5px;font-weight:300}
.contact-points{margin-top:32px;display:flex;flex-direction:column;gap:16px}
.contact-points li{padding-left:28px;position:relative;color:var(--text-soft);font-size:14.5px}
.contact-points li::before{content:'';position:absolute;left:0;top:9px;width:12px;height:1px;background:var(--green)}
.contact-points strong{color:var(--text);font-weight:600}

.contact-channels{margin-top:40px;display:flex;flex-direction:column;gap:2px}
.chan{display:flex;align-items:center;gap:16px;padding:20px 4px;border-top:1px solid var(--line);transition:.25s var(--ease)}
.chan:last-child{border-bottom:1px solid var(--line)}
.chan:hover{padding-left:12px}
.chan-ico{width:40px;height:40px;flex-shrink:0;display:grid;place-items:center;border-radius:var(--r-xs);background:var(--paper);color:var(--green);border:1px solid var(--line)}
.chan-txt{display:flex;flex-direction:column;line-height:1.35}
.chan-txt small{font-size:11px;color:var(--text-soft);letter-spacing:.06em;text-transform:uppercase}
.chan-txt b{font-family:"Sora",sans-serif;font-size:15px;color:var(--text);font-weight:600}

.contact-form{background:var(--paper);border:1px solid var(--line);padding:40px;border-radius:var(--r-xs)}
.field{margin-bottom:20px}
.field-row{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.field label{display:block;font-size:12px;font-weight:600;color:var(--text);margin-bottom:8px;letter-spacing:.03em;text-transform:uppercase}
.field input,.field select,.field textarea{
  width:100%;padding:14px 16px;border:1px solid var(--line);border-radius:var(--r-xs);
  font-family:inherit;font-size:15px;color:var(--text);background:var(--paper-2);transition:.2s var(--ease);
}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:var(--green);background:#fff}
.field textarea{resize:vertical}
.form-note{margin-top:16px;font-size:13.5px;padding:14px 16px;border-radius:var(--r-xs);background:rgba(60,139,63,.1);color:var(--green-dark);font-weight:500}

/* ============================================================
   FOOTER
   ============================================================ */
.site-footer{background:var(--ink);color:var(--text-onDark-soft);padding:88px 0 30px}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.3fr;gap:48px;padding-bottom:56px;border-bottom:1px solid var(--line-dark)}
.brand-footer .brand-word{color:#fff}
.footer-tag{margin-top:22px;font-size:14px;max-width:320px;line-height:1.7;font-weight:300}
.footer-col h5{color:#fff;font-size:12px;font-family:"Sora",sans-serif;margin-bottom:20px;letter-spacing:.1em;text-transform:uppercase;font-weight:600}
.footer-col a{display:block;font-size:14px;padding:7px 0;color:var(--text-onDark-soft);transition:.2s var(--ease)}
.footer-col a:hover{color:#fff}
.footer-data{font-size:13.5px;line-height:1.8;margin-bottom:22px}
.footer-data strong{color:var(--text-onDark)}
.footer-bottom{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;padding-top:28px;font-size:12.5px;color:var(--text-onDark-soft)}

/* ---------- WhatsApp FAB ---------- */
.whats-fab{
  position:fixed;bottom:26px;right:26px;z-index:90;width:56px;height:56px;border-radius:50%;
  background:var(--green);color:#fff;display:grid;place-items:center;
  box-shadow:var(--shadow-lg);transition:.3s var(--ease);
}
.whats-fab:hover{transform:translateY(-3px) scale(1.05);background:var(--green-dark)}

/* ---------- Cookie banner (LGPD) ---------- */
.cookie-banner{
  position:fixed;left:0;right:0;bottom:0;z-index:200;
  background:var(--ink);border-top:1px solid var(--line-dark);
  padding:20px 24px;transform:translateY(100%);transition:.4s var(--ease);
}
.cookie-banner.in{transform:translateY(0)}
.cookie-banner-inner{
  max-width:var(--container);margin:0 auto;display:flex;align-items:center;
  gap:24px;flex-wrap:wrap;justify-content:space-between;
}
.cookie-banner-inner p{color:var(--text-onDark-soft);font-size:13.5px;max-width:620px;flex:1;min-width:240px}
.cookie-banner-actions{display:flex;gap:10px;flex-shrink:0}
.cookie-banner .btn-ghost{color:#fff;border-color:rgba(255,255,255,.3)}
.cookie-banner .btn-ghost:hover{border-color:#fff;background:rgba(255,255,255,.08)}
@media (max-width:560px){
  .cookie-banner-inner{flex-direction:column;align-items:stretch;text-align:center}
  .cookie-banner-actions{justify-content:center}
}

/* ============================================================
   REVEAL / PARALLAX
   ============================================================ */
.reveal{opacity:0;transform:translateY(32px);transition:opacity .8s var(--ease),transform .8s var(--ease)}
.reveal.in{opacity:1;transform:none}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width:1080px){
  .services-grid{grid-template-columns:repeat(2,1fr)}
  .indicators-grid{grid-template-columns:1fr 1fr;row-gap:36px}
  .gallery-grid{grid-template-columns:repeat(2,1fr);grid-auto-rows:200px}
  .g-wide{grid-column:span 2}
}
@media (max-width:980px){
  .two-col,.two-col.reverse{grid-template-columns:1fr;gap:48px}
  .two-col.reverse .col-copy{order:0}
  .obra-panel,.obra-panel.reverse{grid-template-columns:1fr;min-height:auto}
  .obra-panel.reverse .obra-media,.obra-panel .obra-media{order:1;aspect-ratio:16/10}
  .obra-panel.reverse .obra-info,.obra-panel .obra-info{order:2;padding:48px 32px}
  .obra-media img{height:100%}
  .contact-inner{grid-template-columns:1fr;gap:48px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:36px}
}
@media (max-width:720px){
  .nav{
    position:fixed;top:72px;left:0;right:0;flex-direction:column;align-items:stretch;
    background:rgba(11,13,16,.97);backdrop-filter:blur(14px);padding:20px 24px 28px;gap:2px;
    transform:translateY(-140%);transition:.4s var(--ease);
  }
  .nav.open{transform:translateY(0)}
  .nav>a{padding:15px 14px}
  .nav-cta{text-align:center;margin-top:8px;margin-left:0}
  .nav-toggle{display:flex}
  .header-inner{height:72px}
  .hero-inner{padding-bottom:80px}
}
@media (max-width:560px){
  .section{padding:88px 0}
  .services-grid{grid-template-columns:1fr}
  .indicators-grid{grid-template-columns:1fr}
  .ind-item{border-left:0;border-top:1px solid var(--line-dark);padding-left:0;padding-top:20px}
  .gallery-grid{grid-template-columns:1fr;grid-auto-rows:260px}
  .g-tall,.g-wide{grid-column:span 1;grid-row:span 1}
  .footer-grid{grid-template-columns:1fr}
  .field-row{grid-template-columns:1fr}
  .contact-form{padding:28px}
  .partners-grid span{font-size:13px;padding:12px 18px}
}

@media (prefers-reduced-motion:reduce){
  *{animation-duration:.001ms!important;transition-duration:.001ms!important}
  .reveal{opacity:1;transform:none}
  .marquee-track{animation:none}
  .hero-media img{transform:none}
}