/* ============================================================
   DE SANTIS ENGENHARIA — style.css
   Identidade: monocromática (preto/branco/cinzas) derivada da
   logo, com um único detalhe em bronze discreto.
   Tipografia: Barlow Condensed (títulos) · IBM Plex Sans (texto)
               · IBM Plex Mono (rótulos técnicos e números)
============================================================ */

/* ---------- Variáveis globais (EDITAR AQUI para ajustar cores) ---------- */
:root {
  --ink: #121212;          /* preto da marca */
  --graphite: #2a2a2a;     /* grafite (faixas escuras) */
  --paper: #ffffff;        /* branco */
  --paper-gray: #f4f4f2;   /* cinza claro de fundo */
  --line: #e2e2de;         /* linhas finas */
  --gray: #6b6b68;         /* texto secundário */
  --bronze: #a38b5f;       /* detalhe discreto */
  --radius: 0px;           /* cantos retos, como o quadro da logo */
  --container: 1180px;
  --header-h: 76px;
}

/* ---------- Reset básico ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: "IBM Plex Sans", system-ui, -apple-system, sans-serif;
  font-size: 16px;
  line-height: 1.65;
  color: var(--ink);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }

.container { max-width: var(--container); margin: 0 auto; padding: 0 24px; }

/* ---------- Tipografia ---------- */
h1, h2, h3 {
  font-family: "Barlow Condensed", sans-serif;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.01em;
  line-height: 1.05;
}
h2 { font-size: clamp(2rem, 4.5vw, 3.1rem); }
h3 { font-size: 1.35rem; letter-spacing: 0.03em; }

.eyebrow {
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.72rem;
  letter-spacing: 0.22em;
  color: var(--gray);
  border-left: 2px solid var(--bronze);
  padding-left: 10px;
  margin-bottom: 16px;
}
.eyebrow--light { color: #b9b9b4; }

.lead { font-size: 1.35rem; line-height: 1.5; font-weight: 500; }

/* ---------- Botões ---------- */
.btn {
  display: inline-block;
  font-family: "Barlow Condensed", sans-serif;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 1rem;
  padding: 14px 30px;
  border: 1px solid var(--ink);
  transition: background .25s ease, color .25s ease, transform .25s ease;
  cursor: pointer;
  text-align: center;
}
.btn--solid { background: var(--ink); color: var(--paper); }
.btn--solid:hover { background: var(--paper); color: var(--ink); }
.btn--ghost { background: transparent; color: var(--ink); }
.btn--ghost:hover { background: var(--ink); color: var(--paper); }
.btn--light { background: var(--paper); color: var(--ink); border-color: var(--paper); }
.btn--light:hover { background: transparent; color: var(--paper); }
.btn--full { width: 100%; }
.btn:active { transform: translateY(1px); }

/* Foco visível (acessibilidade) */
a:focus-visible, button:focus-visible, input:focus-visible,
select:focus-visible, textarea:focus-visible {
  outline: 2px solid var(--bronze);
  outline-offset: 2px;
}

/* ============================================================
   1. HEADER
============================================================ */
.header {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--header-h);
  background: rgba(255,255,255,.96);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid var(--line);
  z-index: 100;
}
.header__inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

/* Marca desenhada em código (espelha o quadro da logo) */
.logo { display: flex; align-items: center; gap: 10px; }
.logo__frame {
  border: 2px solid var(--ink);
  padding: 5px 8px 4px;
  display: flex;
  flex-direction: column;
  font-family: "Barlow Condensed", sans-serif;
  font-weight: 600;
  font-size: 0.95rem;
  line-height: 1;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}
.logo__sub {
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.62rem;
  letter-spacing: 0.34em;
  color: var(--gray);
}
.logo-img img { height: 48px; width: auto; }

.nav { display: flex; align-items: center; gap: 28px; }
.nav a:not(.btn) {
  font-size: 0.92rem;
  font-weight: 500;
  position: relative;
  padding: 4px 0;
}
.nav a:not(.btn)::after {
  content: "";
  position: absolute;
  left: 0; bottom: 0;
  width: 0; height: 1px;
  background: var(--bronze);
  transition: width .25s ease;
}
.nav a:not(.btn):hover::after { width: 100%; }
.nav__cta { padding: 10px 20px; font-size: 0.9rem; }

/* Menu mobile */
.menu-toggle {
  display: none;
  background: none;
  border: none;
  width: 40px; height: 40px;
  flex-direction: column;
  justify-content: center;
  gap: 6px;
  cursor: pointer;
}
.menu-toggle span {
  display: block;
  height: 2px; width: 26px;
  background: var(--ink);
  margin: 0 auto;
  transition: transform .25s ease, opacity .25s ease;
}
.menu-toggle.is-open span:nth-child(1) { transform: translateY(8px) rotate(45deg); }
.menu-toggle.is-open span:nth-child(2) { opacity: 0; }
.menu-toggle.is-open span:nth-child(3) { transform: translateY(-8px) rotate(-45deg); }

/* ============================================================
   2. HERO
============================================================ */
.hero {
  position: relative;
  padding: calc(var(--header-h) + 96px) 0 110px;
  overflow: hidden;
}
/* Fundo: papel quadriculado de prancha técnica (puro CSS, leve) */
.hero__grid-bg {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 56px 56px;
  opacity: .5;
  mask-image: linear-gradient(to bottom, rgba(0,0,0,.9), transparent 85%);
  -webkit-mask-image: linear-gradient(to bottom, rgba(0,0,0,.9), transparent 85%);
}
.hero__inner { position: relative; max-width: 880px; }
.hero__title {
  font-size: clamp(3rem, 8.5vw, 6rem);
  margin: 8px 0 26px;
}
.hero__title em {
  font-style: normal;
  color: transparent;
  -webkit-text-stroke: 2px var(--ink);
}
.hero__sub {
  font-size: 1.15rem;
  color: var(--gray);
  max-width: 560px;
  margin-bottom: 36px;
}
.hero__actions { display: flex; gap: 16px; flex-wrap: wrap; margin-bottom: 48px; }
.hero__meta {
  display: flex;
  align-items: center;
  gap: 14px;
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.72rem;
  letter-spacing: 0.2em;
  color: var(--gray);
}
.hero__dot { width: 4px; height: 4px; background: var(--bronze); }

/* ============================================================
   Seções
============================================================ */
.section { padding: 96px 0; }
.section--gray { background: var(--paper-gray); }
.section--dark { background: var(--graphite); color: #efefec; }
.section--dark h2, .section--dark h3 { color: #fff; }
.section__head { max-width: 720px; margin-bottom: 56px; }
.section__desc { color: var(--gray); margin-top: 14px; font-size: 1.05rem; }
.section--dark .section__desc { color: #b9b9b4; }

/* ---------- 3. Sobre ---------- */
.sobre__grid {
  display: grid;
  grid-template-columns: 5fr 6fr;
  gap: 56px;
}
.sobre__lead { border-top: 2px solid var(--ink); padding-top: 24px; }
.sobre__text p + p { margin-top: 16px; }
.sobre__values { margin-top: 28px; border-top: 1px solid var(--line); }
.sobre__values li {
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
  font-size: 0.95rem;
}

/* ---------- 4. Serviços ---------- */
.cards {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;                 /* hairlines entre cards, como malha de prancha */
  background: var(--line);
  border: 1px solid var(--line);
}
.card {
  background: var(--paper);
  padding: 32px 26px;
  transition: transform .25s ease, box-shadow .25s ease;
}
.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 28px rgba(18,18,18,.08);
  position: relative;
  z-index: 1;
}
.card__icon { width: 34px; height: 34px; margin-bottom: 18px; }
.card__icon svg {
  width: 100%; height: 100%;
  fill: none;
  stroke: var(--ink);
  stroke-width: 1.5;
  stroke-linecap: round;
  stroke-linejoin: round;
}
.card h3 { margin-bottom: 10px; }
.card p { font-size: 0.92rem; color: var(--gray); }

/* ---------- 5. Diferenciais ---------- */
.dif__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px 48px;
}
.dif { border-top: 1px solid rgba(255,255,255,.18); padding-top: 20px; }
.dif h3 { margin-bottom: 8px; font-size: 1.2rem; }
.dif p { color: #b9b9b4; font-size: 0.95rem; }

/* ---------- 6. Calculadora ---------- */
.calc__layout {
  display: grid;
  grid-template-columns: 7fr 5fr;
  gap: 40px;
  align-items: start;
}
.calc__form {
  background: var(--paper);
  border: 1px solid var(--line);
  padding: 36px;
}
.field { display: flex; flex-direction: column; gap: 6px; margin-bottom: 18px; }
.field__row { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.field label {
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--gray);
}
.field .opt { text-transform: none; letter-spacing: 0; }
.field input, .field select, .field textarea {
  font-family: inherit;
  font-size: 1rem;
  padding: 12px 14px;
  border: 1px solid var(--line);
  background: var(--paper);
  color: var(--ink);
  border-radius: var(--radius);
  transition: border-color .2s ease;
  width: 100%;
}
.field input:focus, .field select:focus, .field textarea:focus {
  border-color: var(--ink);
}
.field input.is-invalid, .field select.is-invalid {
  border-color: #b3261e;
}
.calc__error { color: #b3261e; font-size: 0.9rem; margin-bottom: 14px; }
.calc__privacy {
  margin-top: 14px;
  font-size: 0.8rem;
  color: var(--gray);
  text-align: center;
}

/* Card de resultado — estilo "carimbo de prancha técnica" */
.calc__side { display: flex; flex-direction: column; gap: 24px; }
.calc__result {
  background: var(--ink);
  color: var(--paper);
  padding: 30px 28px;
  border: 1px solid var(--ink);
}
.calc__result-label {
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  color: var(--bronze);
  margin-bottom: 18px;
}
.calc__scenarios { border-top: 1px solid rgba(255,255,255,.2); margin-bottom: 22px; }
.scenario {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding: 13px 0;
  border-bottom: 1px solid rgba(255,255,255,.2);
  gap: 12px;
}
.scenario__tag {
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: #b9b9b4;
}
.scenario strong {
  font-family: "Barlow Condensed", sans-serif;
  font-size: 1.4rem;
  font-weight: 600;
  white-space: nowrap;
}
.scenario--main strong { font-size: 1.9rem; color: var(--bronze); }
.calc__result .btn--solid {
  background: var(--paper);
  color: var(--ink);
  border-color: var(--paper);
}
.calc__result .btn--solid:hover { background: transparent; color: var(--paper); }
.calc__result-note {
  margin-top: 12px;
  font-size: 0.8rem;
  color: #b9b9b4;
  text-align: center;
}

.calc__ref {
  border: 1px solid var(--line);
  background: var(--paper);
  padding: 26px 28px;
}
.calc__ref h3 { font-size: 1.05rem; margin-bottom: 10px; }
.calc__ref p { font-size: 0.88rem; color: var(--gray); }
.calc__ref p + p { margin-top: 12px; }
.calc__disclaimer {
  border-left: 2px solid var(--bronze);
  padding-left: 12px;
  font-style: italic;
}

/* ---------- 7. Projetos ---------- */
.proj__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.proj__ph {
  aspect-ratio: 4 / 3;
  background:
    repeating-linear-gradient(45deg, transparent 0 14px, rgba(18,18,18,.03) 14px 15px),
    var(--paper-gray);
  border: 1px solid var(--line);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform .3s ease;
}
.proj:hover .proj__ph { transform: scale(1.015); }
.proj__ph span {
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.7rem;
  letter-spacing: 0.22em;
  color: var(--gray);
}
.proj img { aspect-ratio: 4 / 3; object-fit: cover; border: 1px solid var(--line); }
.proj figcaption { margin-top: 10px; font-size: 0.9rem; color: var(--gray); }
.proj figcaption strong { color: var(--ink); font-weight: 600; }

/* ---------- 8. Contadores ---------- */
.counters { padding: 72px 0; }
.counters__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  text-align: center;
}
.counter__num {
  display: block;
  font-family: "Barlow Condensed", sans-serif;
  font-size: clamp(2.6rem, 6vw, 4rem);
  font-weight: 600;
  line-height: 1;
  color: #fff;
}
.counter__label {
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.72rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--bronze);
  display: block;
  margin-top: 10px;
}

/* ---------- 9. Depoimentos ---------- */
.depo__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.depo {
  border: 1px solid var(--line);
  padding: 30px 28px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 20px;
}
.depo p { font-size: 0.98rem; }
.depo footer {
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--gray);
}

/* ---------- 10. Chamada final ---------- */
.cta-final { text-align: center; }
.cta-final__inner { max-width: 680px; }
.cta-final p { color: #b9b9b4; margin: 18px 0 32px; }

/* ---------- 11. Contato ---------- */
.contato__grid {
  display: grid;
  grid-template-columns: 5fr 6fr;
  gap: 48px;
  align-items: start;
}
.contato__item { padding: 16px 0; border-bottom: 1px solid var(--line); }
.contato__item dt {
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--gray);
  margin-bottom: 4px;
}
.contato__item dd { font-size: 1.05rem; font-weight: 500; }
.contato__item a:hover { color: var(--bronze); }
.contato__form {
  background: var(--paper);
  border: 1px solid var(--line);
  padding: 32px;
}

/* ---------- 12. Rodapé ---------- */
.footer { background: var(--ink); color: #cfcfca; }
.footer__inner {
  display: grid;
  grid-template-columns: 4fr 2fr 3fr 3fr;
  gap: 40px;
  padding: 64px 24px 48px;
}
.footer__logo { height: 110px; width: auto; margin-bottom: 18px; }
.footer__brand p { font-size: 0.9rem; max-width: 280px; }
.footer__col { display: flex; flex-direction: column; gap: 10px; }
.footer__col h4 {
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--bronze);
  margin-bottom: 6px;
}
.footer__col a, .footer__col span { font-size: 0.92rem; }
.footer__col a:hover { color: #fff; }
.footer__bottom {
  border-top: 1px solid rgba(255,255,255,.12);
  padding: 20px 24px;
  font-size: 0.8rem;
  color: #8c8c88;
}

/* ============================================================
   Animações de entrada (fade-in ao rolar)
============================================================ */
.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity .7s ease, transform .7s ease;
}
.reveal.is-visible { opacity: 1; transform: none; }

/* Acessibilidade: respeita usuários que preferem menos movimento */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  * { animation: none !important; transition: none !important; }
}

/* ============================================================
   Responsividade
============================================================ */
@media (max-width: 1024px) {
  .cards { grid-template-columns: repeat(2, 1fr); }
  .dif__grid { grid-template-columns: repeat(2, 1fr); }
  .proj__grid, .depo__grid { grid-template-columns: repeat(2, 1fr); }
  .footer__inner { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 820px) {
  .sobre__grid, .calc__layout, .contato__grid { grid-template-columns: 1fr; }
  .section { padding: 72px 0; }

  /* Menu mobile */
  .menu-toggle { display: flex; }
  .nav {
    position: fixed;
    top: var(--header-h);
    left: 0; right: 0;
    background: var(--paper);
    border-bottom: 1px solid var(--line);
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 12px 24px 24px;
    transform: translateY(-12px);
    opacity: 0;
    pointer-events: none;
    transition: opacity .25s ease, transform .25s ease;
  }
  .nav.is-open { transform: none; opacity: 1; pointer-events: auto; }
  .nav a:not(.btn) { padding: 14px 0; border-bottom: 1px solid var(--line); }
  .nav__cta { margin-top: 16px; }
}

@media (max-width: 560px) {
  .cards, .proj__grid, .depo__grid, .dif__grid,
  .counters__grid, .field__row { grid-template-columns: 1fr; }
  .hero { padding-top: calc(var(--header-h) + 64px); }
  .hero__actions .btn { width: 100%; }
  .calc__form, .contato__form { padding: 24px 20px; }
  .footer__inner { grid-template-columns: 1fr; padding-top: 48px; }
}