/* =========================================================================
   PROENERGIA — INSTITUTIONAL WEBSITE
   Design tokens: dark blue / white / gray, green as clean-energy accent
   Display: Space Grotesk · Body: Inter · Data/mono: IBM Plex Mono
   ========================================================================= */

:root{
  /* --- Palette --- */
  --navy-950:#0a1522;
  --navy-900:#0f2138;
  --navy-800:#16304e;
  --blue-700:#223a5e;
  --blue-600:#355282; /* brand blue, extracted from logo */
  --blue-500:#4a6d9e;
  --blue-300:#8aa5c9;
  --gray-800:#33363b;
  --gray-600:#6b6f76; /* logo tagline gray */
  --gray-300:#c7cbd1;
  --gray-100:#e9ebee;
  --gray-050:#f5f6f8;
  --white:#ffffff;
  --green-600:#2f8f5c;
  --green-500:#3fa66b; /* clean-energy accent, used sparingly */
  --green-300:#9adcbb;

  /* --- Type --- */
  --font-display:'Space Grotesk', 'Segoe UI', sans-serif;
  --font-body:'Inter', 'Segoe UI', sans-serif;
  --font-mono:'IBM Plex Mono', monospace;

  /* --- Layout --- */
  --container:1200px;
  --radius-sm:4px;
  --radius-md:8px;
  --nav-height:84px;
  --ease:cubic-bezier(.16,.84,.44,1);
}

/* =========================================================================
   RESET
   ========================================================================= */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0;}
html{scroll-behavior:smooth;}
body{
  font-family:var(--font-body);
  color:var(--gray-800);
  background:var(--white);
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
ul{list-style:none;}
button{font-family:inherit;cursor:pointer;border:none;background:none;}
input,textarea{font-family:inherit;font-size:1rem;}
h1,h2,h3,h4{font-family:var(--font-display);font-weight:600;line-height:1.15;}

@media (prefers-reduced-motion:reduce){
  *{animation-duration:0.001ms !important;animation-iteration-count:1 !important;transition-duration:0.001ms !important;scroll-behavior:auto !important;}
}

:focus-visible{outline:2px solid var(--green-500);outline-offset:3px;}

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

/* =========================================================================
   REVEAL ON SCROLL
   ========================================================================= */
.reveal{opacity:0;will-change:transform,opacity;transition:opacity .8s var(--ease), transform .8s var(--ease);}
.reveal[data-delay="1"]{transition-delay:.05s;}
.reveal[data-delay="2"]{transition-delay:.15s;}
.reveal[data-delay="3"]{transition-delay:.25s;}
.reveal[data-delay="4"]{transition-delay:.35s;}
.reveal[data-reveal="fade-up"]{transform:translateY(36px);}
.reveal[data-reveal="fade-left"]{transform:translateX(48px);}
.reveal[data-reveal="fade-right"]{transform:translateX(-48px);}
.reveal[data-reveal="zoom-in"]{transform:scale(.92);}
.reveal.is-visible{opacity:1;transform:none;}

/* =========================================================================
   BUTTONS
   ========================================================================= */
.btn{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:15px 30px;
  font-size:.95rem;
  font-weight:600;
  border-radius:var(--radius-sm);
  transition:transform .35s var(--ease), box-shadow .35s var(--ease), background .35s var(--ease), color .35s var(--ease);
  letter-spacing:.01em;
}
.btn--primary{
  background:var(--green-500);
  color:var(--white);
  box-shadow:0 8px 20px -8px rgba(63,166,107,.55);
}
.btn--primary:hover{
  background:var(--green-600);
  transform:translateY(-2px);
  box-shadow:0 12px 26px -8px rgba(63,166,107,.6);
}
.btn--ghost{
  background:transparent;
  color:var(--white);
  border:1px solid rgba(255,255,255,.4);
}
.btn--ghost:hover{
  border-color:var(--white);
  background:rgba(255,255,255,.08);
  transform:translateY(-2px);
}

/* =========================================================================
   NAVBAR
   ========================================================================= */
.navbar{
  position:fixed;
  top:0;left:0;right:0;
  z-index:1000;
  height:var(--nav-height);
  display:flex;
  align-items:center;
  background:transparent;
  transition:background .4s var(--ease), box-shadow .4s var(--ease), height .4s var(--ease);
}
.navbar.is-scrolled{
  background:var(--white);
  backdrop-filter:none;
  box-shadow:0 8px 30px -12px rgba(15,33,56,.12);
  height:72px;
}
.navbar.is-scrolled .navbar__link{
  color:var(--navy-950);
}
.navbar.is-scrolled .navbar__link:hover{
  color:var(--navy-900);
}
.navbar.is-scrolled .navbar__burger span{
  background:var(--navy-950);
}
.navbar__inner{
  width:100%;
  max-width:var(--container);
  margin:0 auto;
  padding:0 32px;
  display:flex;
  align-items:center;
  justify-content:space-between;
}
.navbar__logo img{
  height:70px;
  width:auto;
}
.navbar__nav{
  display:flex;
  align-items:center;
  gap:36px;
}
.navbar__link{
  font-size:.92rem;
  font-weight:500;
  color:rgba(255,255,255,.85);
  position:relative;
  padding:6px 0;
  transition:color .3s ease;
}
.navbar__link::after{
  content:'';
  position:absolute;
  left:0;bottom:0;
  width:0;height:2px;
  background:var(--green-500);
  transition:width .3s var(--ease);
}
.navbar__link:hover{color:var(--white);}
.navbar__link:hover::after{width:100%;}
.navbar__link--cta{
  background:var(--green-500);
  color:var(--white) !important;
  padding:10px 20px;
  border-radius:var(--radius-sm);
}
.navbar__link--cta::after{display:none;}
.navbar__link--cta:hover{background:var(--green-600);}
.navbar__burger{
  display:none;
  flex-direction:column;
  gap:5px;
  width:28px;
}
.navbar__burger span{
  height:2px;
  width:100%;
  background:var(--white);
  transition:transform .3s var(--ease), opacity .3s var(--ease);
}

/* =========================================================================
   HERO
   ========================================================================= */
.hero{
  position:relative;
  height:100vh;
  min-height:640px;
  display:flex;
  align-items:center;
  overflow:hidden;
  background:var(--navy-950);
}
.hero__bg{
  position:absolute;
  inset:-40px;
  background-size:cover;
  background-position:center;
  will-change:transform;
}
.hero__overlay{
  position:absolute;inset:0;
  background:
    linear-gradient(180deg, rgba(10,21,34,.75) 0%, rgba(10,21,34,.55) 45%, rgba(10,21,34,.92) 100%);
}
.hero__grid{
  position:absolute;inset:0;
  background-image:
    linear-gradient(rgba(154,220,187,.07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(154,220,187,.07) 1px, transparent 1px);
  background-size:56px 56px;
  mask-image:radial-gradient(ellipse at 30% 40%, black 0%, transparent 70%);
}
.hero__content{
  position:relative;
  z-index:2;
  max-width:760px;
  padding:0 32px;
  margin:0 auto;
  width:100%;
}
.eyebrow{
  display:inline-block;
  font-family:var(--font-mono);
  font-size:.78rem;
  letter-spacing:.12em;
  text-transform:uppercase;
  color:var(--green-300);
  margin-bottom:20px;
}
.eyebrow--dark{color:var(--green-600);}
.hero__title{
  font-size:clamp(2.6rem, 6vw, 4.6rem);
  color:var(--white);
  margin-bottom:26px;
}
.hero__title span{color:var(--green-300);}
.hero__text{
  font-size:1.15rem;
  color:rgba(255,255,255,.82);
  max-width:560px;
  margin-bottom:36px;
}
.hero__actions{
  display:flex;
  gap:18px;
  flex-wrap:wrap;
}
.hero__scroll-cue{
  position:absolute;
  bottom:36px;
  left:50%;
  transform:translateX(-50%);
  width:26px;height:42px;
  border:2px solid rgba(255,255,255,.4);
  border-radius:20px;
  z-index:2;
}
.hero__scroll-cue span{
  display:block;
  width:4px;height:8px;
  background:var(--green-500);
  border-radius:2px;
  margin:6px auto 0;
  animation:scrollCue 1.8s infinite;
}
@keyframes scrollCue{
  0%{transform:translateY(0);opacity:1;}
  70%{transform:translateY(16px);opacity:0;}
  100%{opacity:0;}
}

/* =========================================================================
   SECTION GENERIC
   ========================================================================= */
.section{padding:120px 0;}
.section--dark{background:var(--navy-900);color:rgba(255,255,255,.85);}
.section--gray{background:var(--gray-050);}
.section__head{max-width:640px;margin:0 0 64px;}
.section__title{font-size:clamp(1.9rem,3.4vw,2.6rem);color:var(--blue-700);margin-top:10px;}
.section__title--light{color:var(--white);}

/* =========================================================================
   CARDS (Área de atuação)
   ========================================================================= */
.cards{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:32px;
}
.card{
  background:var(--white);
  border:1px solid var(--gray-100);
  border-radius:var(--radius-md);
  padding:44px 34px;
  transition:transform .4s var(--ease), box-shadow .4s var(--ease), border-color .4s var(--ease);
  position:relative;
  overflow:hidden;
}
.card::before{
  content:'';
  position:absolute;
  top:0;left:0;right:0;
  height:3px;
  background:linear-gradient(90deg, var(--blue-600), var(--green-500));
  transform:scaleX(0);
  transform-origin:left;
  transition:transform .5s var(--ease);
}
.card:hover{
  transform:translateY(-8px);
  box-shadow:0 24px 48px -24px rgba(15,33,56,.25);
  border-color:transparent;
}
.card:hover::before{transform:scaleX(1);}
.card__icon{
  width:58px;height:58px;
  color:var(--blue-600);
  margin-bottom:24px;
  transition:color .35s ease, transform .35s var(--ease);
}
.card:hover .card__icon{color:var(--green-500);transform:scale(1.08);}
.card__title{font-size:1.28rem;color:var(--blue-700);margin-bottom:12px;}
.card__text{color:var(--gray-600);font-size:.96rem;margin-bottom:22px;}
.card__link{
  font-weight:600;
  font-size:.9rem;
  color:var(--blue-600);
  display:inline-flex;
  align-items:center;
  gap:6px;
}
.card__link span{transition:transform .3s var(--ease);}
.card__link:hover span{transform:translateX(4px);}
.card__link:hover{color:var(--green-600);}

/* =========================================================================
   SPLIT SECTIONS (Fornecimento / Fotovoltaica / Eólica)
   ========================================================================= */
.split{padding:110px 0;}
.split--alt{background:var(--gray-050);}
.split__inner{
  display:grid;
  grid-template-columns:1.1fr 1fr;
  gap:72px;
  align-items:center;
}
.split__inner--reverse{grid-template-columns:1fr 1.1fr;}
.split__inner--reverse .split__media{order:1;}
.split__inner--reverse .split__text{order:2;}
.split__title{font-size:clamp(1.8rem,3vw,2.3rem);color:var(--blue-700);margin:10px 0 18px;}
.split__lead{color:var(--gray-800);margin-bottom:22px;font-size:1.02rem;}
.split__media{
  overflow:hidden;
  border-radius:var(--radius-md);
}
.split__media img{
  width:100%;
  aspect-ratio:900 / 700;
  object-fit:cover;
  object-position:center;
  border-radius:var(--radius-md);
  transition:transform .6s var(--ease);
  box-shadow:0 30px 60px -30px rgba(15,33,56,.35);
}
.split__media:hover img{transform:scale(1.045);}
.split__extra p{color:var(--gray-600);font-size:.95rem;margin-top:18px;}

.checklist{
  display:flex;
  flex-direction:column;
  gap:11px;
}
.checklist--cols{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:11px 24px;
}
.checklist li{
  position:relative;
  padding-left:26px;
  font-size:.92rem;
  color:var(--gray-800);
}
.checklist li::before{
  content:'';
  position:absolute;
  left:0;top:6px;
  width:14px;height:14px;
  border-radius:3px;
  background:linear-gradient(135deg, var(--blue-600), var(--green-500));
}

.highlight-box{
  margin:28px 0;
  padding:26px 28px;
  border-left:4px solid var(--green-500);
  background:linear-gradient(90deg, rgba(63,166,107,.08), transparent);
  border-radius:0 var(--radius-md) var(--radius-md) 0;
}
.highlight-box__tag{
  display:block;
  font-family:var(--font-mono);
  font-size:.78rem;
  letter-spacing:.08em;
  text-transform:uppercase;
  color:var(--green-600);
  font-weight:600;
  margin-bottom:8px;
}
.highlight-box p{color:var(--gray-800);font-size:.98rem;}

/* =========================================================================
   EMPRESA
   ========================================================================= */
.empresa{
  display:grid;
  grid-template-columns:1.1fr 1fr;
  gap:72px;
  align-items:center;
  margin-bottom:100px;
}
.empresa__text p{margin-bottom:16px;color:rgba(255,255,255,.75);font-size:.98rem;}
.empresa__media img{border-radius:var(--radius-md);box-shadow:0 30px 60px -20px rgba(0,0,0,.5);}

.counters{
  display:flex;
  gap:56px;
  margin-top:36px;
  padding-top:32px;
  border-top:1px solid rgba(255,255,255,.14);
}
.counter__number{
  display:block;
  font-family:var(--font-mono);
  font-size:2.6rem;
  font-weight:600;
  color:var(--green-300);
  line-height:1;
}
.counter__label{
  display:block;
  margin-top:8px;
  font-size:.85rem;
  color:rgba(255,255,255,.6);
  text-transform:uppercase;
  letter-spacing:.04em;
}

.mvv{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:28px;
}
.mvv__card{
  background:rgba(255,255,255,.04);
  border:1px solid rgba(255,255,255,.1);
  border-radius:var(--radius-md);
  padding:32px 30px;
  transition:background .35s ease, transform .35s var(--ease);
}
.mvv__card:hover{background:rgba(255,255,255,.07);transform:translateY(-6px);}
.mvv__card h3{color:var(--green-300);font-size:1.1rem;margin-bottom:12px;}
.mvv__card p{color:rgba(255,255,255,.72);font-size:.94rem;}
.mvv__values{display:flex;flex-direction:column;gap:8px;}
.mvv__values li{
  font-size:.92rem;
  color:rgba(255,255,255,.72);
  position:relative;
  padding-left:18px;
}
.mvv__values li::before{
  content:'';
  position:absolute;left:0;top:8px;
  width:6px;height:6px;border-radius:50%;
  background:var(--green-500);
}

/* =========================================================================
   CLIENTES
   ========================================================================= */
.clients-grid{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:24px;
}
.clients-grid__item{
  background:var(--white);
  border:1px solid var(--gray-100);
  border-radius:var(--radius-md);
  padding:20px;
  display:flex;
  align-items:center;
  justify-content:center;
  transition:transform .35s var(--ease), box-shadow .35s var(--ease);
  filter:grayscale(1);
  opacity:.75;
}
.clients-grid__item:hover{
  transform:translateY(-6px);
  box-shadow:0 20px 40px -20px rgba(15,33,56,.25);
  filter:grayscale(0);
  opacity:1;
}
.clients-grid__item img{border-radius:var(--radius-sm);}

/* =========================================================================
   CONTATO
   ========================================================================= */
.contact{
  display:grid;
  grid-template-columns:1fr 1.15fr;
  gap:56px;
  align-items:start;
}
.contact__map{
  overflow:hidden;
  border-radius:var(--radius-md);
  box-shadow:0 24px 50px -24px rgba(15,33,56,.3);
}
.contact__map iframe{
  width:100%;
  aspect-ratio:900 / 600;
  border:0;
  display:block;
}
.contact__details{
  display:flex;
  flex-direction:column;
  gap:20px;
  margin-bottom:34px;
  padding-bottom:34px;
  border-bottom:1px solid var(--gray-100);
}
.contact__label{
  display:block;
  font-family:var(--font-mono);
  font-size:.74rem;
  letter-spacing:.08em;
  text-transform:uppercase;
  color:var(--green-600);
  margin-bottom:6px;
  font-weight:600;
}
.contact__item p{color:var(--gray-800);font-size:.96rem;}
.contact__item a:hover{color:var(--blue-600);}

.form__row{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:18px;
  margin-bottom:18px;
}
.contact__form label{
  display:flex;
  flex-direction:column;
  gap:8px;
  font-size:.85rem;
  font-weight:600;
  color:var(--gray-800);
  margin-bottom:18px;
}
.form__row label{margin-bottom:0;}
.contact__form input,
.contact__form textarea{
  border:1px solid var(--gray-300);
  border-radius:var(--radius-sm);
  padding:13px 15px;
  font-size:.95rem;
  color:var(--gray-800);
  background:var(--white);
  transition:border-color .3s ease, box-shadow .3s ease;
  resize:vertical;
}
.contact__form input:focus,
.contact__form textarea:focus{
  outline:none;
  border-color:var(--blue-600);
  box-shadow:0 0 0 3px rgba(53,82,130,.12);
}
.form__submit{width:100%;justify-content:center;margin-top:6px;}

/* =========================================================================
   WHATSAPP FLOAT
   ========================================================================= */
.whatsapp-float{
  position:fixed;
  bottom:26px;right:26px;
  width:60px;height:60px;
  border-radius:50%;
  background:var(--white);
  display:flex;align-items:center;justify-content:center;
  box-shadow:0 10px 30px -8px rgba(0,0,0,.35);
  z-index:900;
  transition:transform .3s var(--ease);
}
.whatsapp-float svg{width:38px;height:38px;}
.whatsapp-float:hover{transform:scale(1.08);}
.whatsapp-float::after{
  content:'';
  position:absolute;
  inset:0;
  border-radius:50%;
  border:2px solid #25D366;
  animation:pulse 2.2s infinite;
}
@keyframes pulse{
  0%{transform:scale(1);opacity:.7;}
  100%{transform:scale(1.7);opacity:0;}
}

/* =========================================================================
   FOOTER
   ========================================================================= */
.footer{
  background:var(--navy-950);
  padding:28px 0;
}
.footer__inner{
  display:flex;
  justify-content:space-between;
  align-items:center;
  flex-wrap:wrap;
  gap:10px;
}
.footer__copy,.footer__dev{font-size:.82rem;color:rgba(255,255,255,.55);}
.footer__dev a{color:var(--green-300);font-weight:600;}
.footer__dev a:hover{text-decoration:underline;}

/* =========================================================================
   RESPONSIVE
   ========================================================================= */
@media (max-width:1024px){
  .cards{grid-template-columns:1fr;}
  .split__inner,.split__inner--reverse{grid-template-columns:1fr;}
  .split__inner--reverse .split__media,
  .split__inner--reverse .split__text{order:initial;}
  .empresa{grid-template-columns:1fr;}
  .mvv{grid-template-columns:1fr;}
  .clients-grid{grid-template-columns:repeat(3,1fr);}
  .contact{grid-template-columns:1fr;}
  .checklist--cols{grid-template-columns:1fr;}
}

@media (max-width:780px){
  .navbar__nav{
    position:fixed;
    top:0;right:0;
    height:100vh;
    width:min(78vw,320px);
    background:var(--navy-950);
    flex-direction:column;
    justify-content:center;
    gap:28px;
    transform:translateX(100%);
    transition:transform .4s var(--ease);
  }
  .navbar__nav.is-open{transform:translateX(0);}
  .navbar__burger{display:flex;}
  .navbar__burger.is-open span:nth-child(1){transform:translateY(7px) rotate(45deg);}
  .navbar__burger.is-open span:nth-child(2){opacity:0;}
  .navbar__burger.is-open span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}

  .section{padding:80px 0;}
  .split{padding:70px 0;}
  .hero__title{font-size:2.4rem;}
  .counters{gap:32px;flex-wrap:wrap;}
  .clients-grid{grid-template-columns:repeat(2,1fr);}
  .form__row{grid-template-columns:1fr;}
  .footer__inner{flex-direction:column;text-align:center;}
}

@media (max-width:480px){
  .container{padding:0 20px;}
  .hero__actions{flex-direction:column;align-items:stretch;}
  .card{padding:34px 26px;}
}