/* ================================================================
   NEXO ARQUITETURA — STYLESHEET
   Cores em variáveis CSS, sobrescritas em runtime por script.js
   a partir de config.js.
   ================================================================ */

:root{
  --black: #111111;
  --white: #FFFFFF;
  --gray: #8A8A8A;
  --beige: #E8E2D8;

  --font-display: "Newsreader", serif;
  --font-body: "Archivo", sans-serif;

  --container: 1320px;
  --radius: 2px;
}

*,*::before,*::after{ box-sizing: border-box; }

html{ scroll-behavior: smooth; scroll-padding-top: 90px; }

body{
  margin:0;
  background: var(--white);
  color: var(--black);
  font-family: var(--font-body);
  font-weight: 400;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

img{ max-width:100%; display:block; }
a{ color: inherit; text-decoration:none; }

h1,h2,h3{
  font-family: var(--font-display);
  font-weight: 400;
  font-style: italic;
  line-height: 1.08;
  letter-spacing: -0.01em;
  margin:0;
}

p{ margin:0; }

.container{ max-width: var(--container); margin:0 auto; padding: 0 40px; }

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

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

/* ---------------- ICONS ---------------- */
.icon{ width: 20px; height: 20px; }
.icon--sm{ width: 16px; height: 16px; }

/* ---------------- BUTTONS ---------------- */
.btn{
  display:inline-flex; align-items:center; gap:10px;
  padding: 16px 30px;
  border-radius: var(--radius);
  font-family: var(--font-body);
  font-weight: 500;
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  border: 1px solid transparent;
  cursor:pointer;
  transition: background .2s ease, color .2s ease, border-color .2s ease, opacity .2s ease;
  white-space: nowrap;
}
.btn:hover{ opacity: 0.75; }

.btn--dark{ background: var(--black); color: var(--white); }
.btn--light{ background: var(--white); color: var(--black); }

.btn--outline{ background: transparent; color: var(--black); border-color: var(--black); }
.btn--outline-light{ background: transparent; color: var(--white); border-color: var(--white); }

.btn--header{ padding: 10px 20px; }

/* ---------------- HEADER ---------------- */
.header{
  position: fixed; top:0; left:0; right:0; z-index: 100;
  background: rgba(255,255,255,0);
  border-bottom: 1px solid transparent;
  transition: background .3s ease, border-color .3s ease;
}
.header.is-scrolled{ background: rgba(255,255,255,0.94); backdrop-filter: blur(8px); border-color: #EDEAE4; }

.header__inner{ display:flex; align-items:center; justify-content:space-between; height: 84px; }

.brand{
  font-family: var(--font-display); font-style: italic;
  font-size: 1.5rem; color: var(--black);
}
.hero ~ .header .brand,
body:not(.is-scrolled) .header .brand{ color: var(--black); }

.nav{ display:flex; gap: 38px; }
.nav a{ font-size: 0.8rem; letter-spacing: 0.08em; text-transform: uppercase; font-weight:500; position:relative; padding: 4px 0; }
.nav a::after{
  content:""; position:absolute; left:0; right:100%; bottom:-2px; height:1px;
  background: var(--black); transition: right .22s ease;
}
.nav a:hover::after{ right:0; }

.nav-toggle{ display:none; background:none; border:none; color:var(--black); cursor:pointer; }

.mobile-nav{
  position: fixed; inset:0; z-index:200;
  background: var(--white);
  display:flex; flex-direction:column; align-items:center; justify-content:center; gap: 30px;
  transform: translateY(-100%);
  transition: transform .35s ease;
}
.mobile-nav.is-open{ transform: translateY(0); }
.mobile-nav a{ font-family: var(--font-display); font-style: italic; font-size: 1.9rem; }
.mobile-nav__close{ position:absolute; top:28px; right:32px; background:none; border:none; color:var(--black); cursor:pointer; }

/* header sits over dark hero, so keep it visible before scroll */
.header:not(.is-scrolled) .brand,
.header:not(.is-scrolled) .nav a,
.header:not(.is-scrolled) .nav-toggle{ color: var(--white); }
.header:not(.is-scrolled) .btn--header{ border-color: var(--white); color: var(--white); }

/* ---------------- HERO ---------------- */
.hero{ position:relative; min-height: 100vh; display:flex; align-items:flex-end; overflow:hidden; }
.hero__media{ position:absolute; inset:0; z-index:0; }
.hero__media img{ width:100%; height:100%; object-fit:cover; }
.hero__scrim{
  position:absolute; inset:0;
  background: linear-gradient(180deg, rgba(17,17,17,0.15) 0%, rgba(17,17,17,0.25) 45%, rgba(17,17,17,0.82) 100%);
}
.hero__content{ position:relative; z-index:1; padding-bottom: 110px; padding-top: 200px; color: var(--white); }

.hero__title{
  font-size: clamp(2.6rem, 5.6vw, 4.6rem);
  max-width: 16ch;
  font-weight: 300;
}
.hero__subtitle{ margin-top: 26px; max-width: 44ch; font-size: 1.08rem; color: #EDEAE4; }
.hero__actions{ margin-top: 40px; display:flex; flex-wrap:wrap; gap:16px; }

/* ---------------- SECTION TITLES ---------------- */
.section-title{
  font-size: clamp(2rem, 3.6vw, 2.8rem);
  margin-bottom: 64px;
}

section{ padding: 150px 0; }

/* ---------------- SOBRE ---------------- */
.about__inner{ max-width: 780px; }
.about__rule{ display:block; width: 46px; height:1px; background: var(--black); margin-bottom: 30px; }
.about h2{ font-size: clamp(2.1rem, 4vw, 3rem); max-width: 14ch; }
.about p{ margin-top: 30px; font-size: 1.15rem; color: #4A4A4A; max-width: 52ch; line-height: 1.75; }

/* ---------------- SERVIÇOS ---------------- */
.services__list{ border-top: 1px solid #E4E0D9; }
.service-row{
  display:grid; grid-template-columns: 1fr 1.3fr; gap: 40px;
  padding: 38px 0;
  border-bottom: 1px solid #E4E0D9;
}
.service-row h3{ font-size: 1.7rem; font-weight:300; }
.service-row p{ color: var(--gray); font-size: 1rem; align-self:center; max-width: 44ch; }

/* ---------------- PROJETOS ---------------- */
.projects__grid{ display:grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.project-card{
  position:relative; cursor:pointer;
  aspect-ratio: 4/3; overflow:hidden; border-radius: var(--radius);
}
.project-card img{ width:100%; height:100%; object-fit:cover; transition: transform .6s ease; }
.project-card:hover img{ transform: scale(1.05); }
.project-card__overlay{
  position:absolute; inset:0;
  background: linear-gradient(180deg, transparent 55%, rgba(17,17,17,0.75));
  display:flex; flex-direction:column; justify-content:flex-end;
  padding: 26px;
  color: var(--white);
}
.project-card__category{ font-size: 0.72rem; letter-spacing: 0.1em; text-transform:uppercase; color: var(--beige); }
.project-card__name{ font-family: var(--font-display); font-style: italic; font-size: 1.6rem; margin-top: 6px; }

/* ---------------- PROCESSO ---------------- */
.process__timeline{
  display:grid; grid-template-columns: repeat(4, 1fr); gap: 30px;
}
.process-step{ border-top: 1px solid var(--black); padding-top: 24px; }
.process-step__number{ font-family: var(--font-display); font-style: italic; font-size: 2.6rem; color: var(--beige); -webkit-text-stroke: 1px var(--black); }
.process-step h3{ font-style: normal; font-family: var(--font-body); font-weight: 600; font-size: 1.05rem; text-transform: uppercase; letter-spacing: 0.04em; margin-top: 14px; }
.process-step p{ color: var(--gray); margin-top: 10px; font-size: 0.95rem; }

/* ---------------- DIFERENCIAIS ---------------- */
.differentials{ background: var(--beige); }
.differentials__inner{ display:grid; grid-template-columns: 0.9fr 1.1fr; gap: 60px; align-items:start; }
.differentials h2{ font-size: clamp(2rem, 3.6vw, 2.8rem); max-width: 11ch; }
.differentials__list{ list-style:none; margin:0; padding:0; }
.differentials__list li{
  display:flex; align-items:center; gap: 16px;
  padding: 22px 0; border-bottom: 1px solid rgba(17,17,17,0.15);
  font-size: 1.15rem;
}
.differentials__list li:first-child{ border-top: 1px solid rgba(17,17,17,0.15); }
.differentials__list li::before{ content:""; width: 22px; height:1px; background: var(--black); flex-shrink:0; }

/* ---------------- CTA ---------------- */
.cta{ background: var(--black); color: var(--white); text-align:center; padding: 200px 0; }
.cta h2{ font-size: clamp(2.4rem, 5.4vw, 4.2rem); max-width: 16ch; margin: 0 auto; font-weight:300; }
.cta .btn{ margin-top: 44px; }

/* ---------------- CONTATO ---------------- */
.contact__grid{ display:grid; grid-template-columns: 0.9fr 1.1fr; gap: 70px; }
.contact__intro h2{ font-size: clamp(2rem, 3.6vw, 2.8rem); }
.contact__intro p{ margin-top: 24px; color: var(--gray); max-width: 40ch; font-size: 1.05rem; }
.contact__intro .btn{ margin-top: 34px; }

.contact__form{ display:flex; flex-direction:column; gap: 26px; }
.contact__form label{ display:flex; flex-direction:column; gap: 8px; }
.contact__form span{ font-size: 0.76rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--gray); }
.contact__form input{
  border: none; border-bottom: 1px solid #C9C3B8;
  padding: 10px 2px; font-family: var(--font-body); font-size: 1.05rem; color: var(--black);
  background: transparent; transition: border-color .2s ease;
}
.contact__form input:focus{ outline:none; border-color: var(--black); }
.contact__form .btn{ align-self:flex-start; margin-top: 10px; }

/* ---------------- FOOTER ---------------- */
.footer{ border-top: 1px solid #E4E0D9; padding: 60px 0 0; }
.footer__grid{ display:grid; grid-template-columns: 1fr 1fr 1fr; align-items:start; gap: 30px; padding-bottom: 40px; }
.footer__logo{ font-family: var(--font-display); font-style: italic; font-size: 1.5rem; }
.footer__col{ display:flex; flex-direction:column; gap: 10px; font-size: 0.92rem; color: var(--gray); }
.footer__col a:hover{ color: var(--black); }
.footer__bottom{ border-top: 1px solid #E4E0D9; padding: 22px 0; text-align:center; }
.footer__bottom p{ font-size: 0.76rem; color: var(--gray); }

/* ---------------- LIGHTBOX ---------------- */
.lightbox{
  position: fixed; inset:0; z-index: 300;
  background: rgba(17,17,17,0.96);
  display:none; align-items:center; justify-content:center;
  padding: 40px;
}
.lightbox.is-open{ display:flex; }
.lightbox__content{
  max-width: 1000px; width:100%;
  display:grid; grid-template-columns: 1.4fr 1fr; gap: 40px; align-items:center;
}
.lightbox__content img{ width:100%; border-radius: var(--radius); max-height: 70vh; object-fit:cover; }
.lightbox__info{ color: var(--white); }
.lightbox__category{ font-size: 0.75rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--beige); }
.lightbox__info h3{ font-size: 2.2rem; margin-top: 10px; }
.lightbox__info p{ margin-top: 18px; color: #C9C3B8; line-height:1.7; }
.lightbox__close{
  position:absolute; top: 30px; right: 30px;
  background:none; border:none; color: var(--white); cursor:pointer;
}
.lightbox__nav{
  position:absolute; top:50%; transform: translateY(-50%);
  background:none; border: 1px solid rgba(255,255,255,0.3); border-radius:50%;
  width: 48px; height:48px; display:flex; align-items:center; justify-content:center;
  color: var(--white); cursor:pointer; transition: background .2s ease;
}
.lightbox__nav:hover{ background: rgba(255,255,255,0.12); }
.lightbox__nav--prev{ left: 24px; }
.lightbox__nav--next{ right: 24px; }

/* ================================================================
   RESPONSIVO
   ================================================================ */
@media (max-width: 980px){
  .nav{ display:none; }
  .nav-toggle{ display:block; }
  #header-cta{ display:none; }

  section{ padding: 100px 0; }

  .service-row{ grid-template-columns: 1fr; gap: 10px; }
  .projects__grid{ grid-template-columns: 1fr; }
  .process__timeline{ grid-template-columns: 1fr 1fr; row-gap: 40px; }
  .differentials__inner{ grid-template-columns: 1fr; gap: 30px; }
  .contact__grid{ grid-template-columns: 1fr; gap: 50px; }
  .footer__grid{ grid-template-columns: 1fr; gap: 24px; }

  .lightbox__content{ grid-template-columns: 1fr; }
  .lightbox__nav{ width: 40px; height:40px; }
}

@media (max-width: 640px){
  .hero__content{ padding-top: 160px; padding-bottom: 80px; }
  .process__timeline{ grid-template-columns: 1fr; }
  .cta{ padding: 140px 0; }
}