/* ==============================================
   ITEL Transformadores — Versão 1: Institucional
   Mobile-first, CSS puro, acessível
   ============================================== */

/* ── Tokens de design ── */
:root {
  --cor-azul: #1a3a5c;
  --cor-azul-claro: #235380;
  --cor-azul-escuro: #0e2338;
  --cor-laranja: #e86c1a;
  --cor-laranja-hover: #c9580f;
  --cor-cinza-bg: #f5f7fa;
  --cor-cinza-borda: #d8dde6;
  --cor-texto: #1f2d3d;
  --cor-texto-suave: #4a6080;
  --cor-branco: #ffffff;
  --cor-verde-wa: #25d366;
  --cor-verde-wa-hover: #1da851;

  --font-titulo: 'Barlow Condensed', sans-serif;
  --font-corpo: 'Inter', sans-serif;

  --sombra-card: 0 2px 16px rgba(26,58,92,.08);
  --sombra-card-hover: 0 8px 32px rgba(26,58,92,.14);
  --raio: 8px;
  --transicao: 0.25s ease;

  --largura-max: 1200px;
  --padding-x: 1.25rem;
}

/* ── Reset mínimo ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: var(--font-corpo);
  color: var(--cor-texto);
  background: var(--cor-branco);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }

/* ── Acessibilidade ── */
.skip-link {
  position: absolute;
  top: -100%;
  left: 1rem;
  padding: 0.5rem 1rem;
  background: var(--cor-azul);
  color: var(--cor-branco);
  font-size: 0.875rem;
  font-weight: 600;
  border-radius: 0 0 var(--raio) var(--raio);
  z-index: 1000;
  transition: top var(--transicao);
}
.skip-link:focus { top: 0; outline: 3px solid var(--cor-laranja); }
.sr-only {
  position: absolute; width: 1px; height: 1px;
  padding: 0; margin: -1px; overflow: hidden;
  clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}
:focus-visible {
  outline: 3px solid var(--cor-laranja);
  outline-offset: 2px;
}

/* ── Container ── */
.container {
  width: 100%;
  max-width: var(--largura-max);
  margin-inline: auto;
  padding-inline: var(--padding-x);
}

/* ── Botões ── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.75rem;
  border-radius: var(--raio);
  font-weight: 600;
  font-size: 0.9375rem;
  transition: background var(--transicao), box-shadow var(--transicao), transform var(--transicao);
  min-height: 48px;
  white-space: nowrap;
}
.btn:active { transform: scale(0.98); }
.btn--primary {
  background: var(--cor-laranja);
  color: var(--cor-branco);
}
.btn--primary:hover, .btn--primary:focus-visible {
  background: var(--cor-laranja-hover);
  box-shadow: 0 4px 16px rgba(232,108,26,.35);
}
.btn--outline {
  background: transparent;
  color: var(--cor-azul);
  border: 2px solid var(--cor-azul);
}
.btn--outline:hover, .btn--outline:focus-visible {
  background: var(--cor-azul);
  color: var(--cor-branco);
}
.btn--whatsapp {
  background: var(--cor-verde-wa);
  color: var(--cor-branco);
}
.btn--whatsapp:hover, .btn--whatsapp:focus-visible {
  background: var(--cor-verde-wa-hover);
  box-shadow: 0 4px 16px rgba(37,211,102,.4);
}
.btn--full { width: 100%; justify-content: center; }
.btn__icon { width: 20px; height: 20px; flex-shrink: 0; }

/* ── Elementos de seção ── */
.section-tag {
  display: inline-block;
  font-family: var(--font-titulo);
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--cor-laranja);
  margin-bottom: 0.5rem;
}
.section-tag--light { color: #f4a85a; }
.section-title {
  font-family: var(--font-titulo);
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 700;
  line-height: 1.15;
  color: var(--cor-azul-escuro);
  margin-bottom: 1.25rem;
}
.section-title--light { color: var(--cor-branco); }
.section-desc { color: var(--cor-texto-suave); max-width: 640px; }
.section-header { margin-bottom: 3rem; text-align: center; }
.section-header .section-desc { margin-inline: auto; }

/* ── Header ── */
.header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 200;
  background: var(--cor-branco);
  border-bottom: 1px solid var(--cor-cinza-borda);
  box-shadow: 0 2px 8px rgba(0,0,0,.06);
  transition: box-shadow var(--transicao);
}
.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 88px;
}
.header__logo img { height: 64px; width: auto; max-width: 220px; object-fit: contain; }
.header__nav { display: none; }
.header__nav-list {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}
.header__nav-link {
  padding: 0.5rem 0.875rem;
  border-radius: var(--raio);
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--cor-texto);
  transition: color var(--transicao), background var(--transicao);
}
.header__nav-link:hover, .header__nav-link:focus-visible {
  color: var(--cor-azul);
  background: var(--cor-cinza-bg);
}
.header__nav-link--cta {
  background: var(--cor-laranja);
  color: var(--cor-branco) !important;
  font-weight: 600;
}
.header__nav-link--cta:hover { background: var(--cor-laranja-hover); }

/* Botão hamburger */
.header__menu-btn {
  display: flex;
  flex-direction: column;
  gap: 5px;
  padding: 10px;
  border-radius: var(--raio);
  min-height: 44px; min-width: 44px;
  align-items: center; justify-content: center;
}
.header__menu-bar {
  display: block;
  width: 22px; height: 2px;
  background: var(--cor-azul);
  border-radius: 2px;
  transition: transform var(--transicao), opacity var(--transicao);
  transform-origin: center;
}
.header__menu-btn[aria-expanded="true"] .header__menu-bar:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.header__menu-btn[aria-expanded="true"] .header__menu-bar:nth-child(2) { opacity: 0; }
.header__menu-btn[aria-expanded="true"] .header__menu-bar:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Nav mobile aberta */
.header__nav.is-open {
  display: block;
  position: absolute;
  top: 88px; left: 0; right: 0;
  background: var(--cor-branco);
  border-bottom: 1px solid var(--cor-cinza-borda);
  padding: 1rem 0;
}
.header__nav.is-open .header__nav-list {
  flex-direction: column;
  align-items: stretch;
  gap: 0;
  padding-inline: var(--padding-x);
}
.header__nav.is-open .header__nav-link { padding: 0.75rem 1rem; border-radius: var(--raio); }

/* ── HERO ── */
.hero {
  position: relative;
  min-height: 100dvh;
  display: flex;
  align-items: center;
  padding-top: 88px;
  overflow: hidden;
}
.hero__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}
.hero__bg img {
  width: 100%; height: 100%;
  object-fit: cover;
  object-position: center;
}
.hero__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(100deg, rgba(14,35,56,.92) 0%, rgba(26,58,92,.7) 60%, rgba(14,35,56,.4) 100%);
}
.hero__content {
  position: relative;
  z-index: 1;
  padding-block: 5rem 4rem;
  max-width: 680px;
}
.hero__tag {
  font-family: var(--font-titulo);
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--cor-laranja);
  margin-bottom: 1rem;
}
.hero__title {
  font-family: var(--font-titulo);
  font-size: clamp(2.5rem, 7vw, 5rem);
  font-weight: 800;
  line-height: 1.0;
  color: var(--cor-branco);
  margin-bottom: 1.5rem;
}
.hero__title em {
  font-style: normal;
  color: var(--cor-laranja);
}
.hero__subtitle {
  font-size: clamp(1rem, 2.5vw, 1.1875rem);
  color: rgba(255,255,255,.8);
  max-width: 540px;
  margin-bottom: 2.5rem;
  line-height: 1.7;
}
.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}
.hero__scroll {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 1;
}
.hero__scroll span {
  display: block;
  width: 24px; height: 38px;
  border: 2px solid rgba(255,255,255,.5);
  border-radius: 12px;
  position: relative;
}
.hero__scroll span::after {
  content: '';
  position: absolute;
  top: 6px; left: 50%;
  width: 4px; height: 8px;
  background: rgba(255,255,255,.7);
  border-radius: 2px;
  transform: translateX(-50%);
  animation: scrollHint 1.8s ease-in-out infinite;
}
@keyframes scrollHint {
  0%, 100% { top: 6px; opacity: 1; }
  50% { top: 18px; opacity: 0.3; }
}

/* ── Animações reveal ── */
.reveal { opacity: 0; transform: translateY(28px); transition: opacity .6s ease, transform .6s ease; }
.reveal.is-visible { opacity: 1; transform: none; }
.reveal-right { opacity: 0; transform: translateX(28px); transition: opacity .6s ease .15s, transform .6s ease .15s; }
.reveal-right.is-visible { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal, .reveal-right { opacity: 1; transform: none; transition: none; }
}

/* ── SOBRE ── */
.sobre {
  padding-block: 5rem;
  background: var(--cor-branco);
}
.sobre__inner {
  display: grid;
  gap: 3rem;
  align-items: center;
}
.sobre__texto p { color: var(--cor-texto-suave); margin-bottom: 1rem; }
.sobre__texto p:last-of-type { margin-bottom: 2rem; }
.sobre__texto strong { color: var(--cor-azul); }
.sobre__imagem img {
  width: 100%;
  height: 360px;
  object-fit: cover;
  border-radius: calc(var(--raio) * 2);
  box-shadow: var(--sombra-card);
}

/* ── DIFERENCIAIS ── */
.diferenciais {
  padding-block: 4rem;
  background: var(--cor-cinza-bg);
  border-top: 1px solid var(--cor-cinza-borda);
  border-bottom: 1px solid var(--cor-cinza-borda);
}
.diferenciais__grid {
  display: grid;
  gap: 1.5rem;
}
.diferenciais__item {
  display: flex;
  gap: 1.25rem;
  align-items: flex-start;
  background: var(--cor-branco);
  padding: 1.75rem;
  border-radius: var(--raio);
  box-shadow: var(--sombra-card);
  transition: box-shadow var(--transicao);
}
.diferenciais__item:hover { box-shadow: var(--sombra-card-hover); }
.diferenciais__icon {
  flex-shrink: 0;
  width: 48px; height: 48px;
  background: rgba(26,58,92,.08);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
}
.diferenciais__icon svg { width: 24px; height: 24px; stroke: var(--cor-azul); }
.diferenciais__item h3 {
  font-family: var(--font-titulo);
  font-size: 1.0625rem;
  font-weight: 700;
  color: var(--cor-azul-escuro);
  margin-bottom: 0.375rem;
}
.diferenciais__item p { font-size: 0.9rem; color: var(--cor-texto-suave); }

/* ── PRODUTOS ── */
.produtos {
  padding-block: 5rem;
  background: var(--cor-branco);
}
.produtos__grid {
  display: grid;
  gap: 1.5rem;
}
.produto-card {
  display: flex;
  flex-direction: column;
  background: var(--cor-branco);
  border: 1px solid var(--cor-cinza-borda);
  border-radius: calc(var(--raio) * 1.5);
  overflow: hidden;
  box-shadow: var(--sombra-card);
  transition: box-shadow var(--transicao), transform var(--transicao);
}
.produto-card:hover {
  box-shadow: var(--sombra-card-hover);
  transform: translateY(-4px);
}
.produto-card__img-wrapper {
  background: var(--cor-cinza-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem;
  aspect-ratio: 4 / 3;
}
.produto-card__img-wrapper img {
  max-height: 220px;
  width: auto;
  object-fit: contain;
  filter: drop-shadow(0 8px 20px rgba(0,0,0,.15));
  transition: transform .4s ease;
}
.produto-card:hover .produto-card__img-wrapper img { transform: scale(1.05); }
.produto-card__body { padding: 1.75rem; display: flex; flex-direction: column; gap: 0.75rem; flex: 1; }
.produto-card__title {
  font-family: var(--font-titulo);
  font-size: 1.1875rem;
  font-weight: 700;
  color: var(--cor-azul-escuro);
}
.produto-card__specs {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  padding: 0.875rem;
  background: var(--cor-cinza-bg);
  border-radius: var(--raio);
  font-size: 0.875rem;
  color: var(--cor-texto-suave);
}
.produto-card__specs strong { color: var(--cor-azul); }
.produto-card__desc { font-size: 0.9rem; color: var(--cor-texto-suave); line-height: 1.65; }
.produtos__cta { text-align: center; margin-top: 3rem; }

/* ── SERVIÇOS ── */
.servicos {
  padding-block: 5rem;
  background: var(--cor-azul);
  color: var(--cor-branco);
}
.servicos__inner {
  display: grid;
  gap: 3rem;
  align-items: center;
}
.servicos__content p { color: rgba(255,255,255,.85); margin-bottom: 1.25rem; }
.servicos__lista {
  margin-bottom: 2rem;
  display: flex;
  flex-direction: column;
  gap: 0.625rem;
}
.servicos__lista li {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  font-size: 0.9375rem;
  color: rgba(255,255,255,.9);
}
.servicos__lista li::before {
  content: '';
  display: block;
  flex-shrink: 0;
  width: 6px; height: 6px;
  background: var(--cor-laranja);
  border-radius: 50%;
}
.servicos__imagem img {
  width: 100%;
  height: 360px;
  object-fit: cover;
  border-radius: calc(var(--raio) * 2);
  opacity: .9;
}

/* ── CONTATO ── */
.contato {
  padding-block: 5rem;
  background: var(--cor-cinza-bg);
}
.contato__inner {
  display: grid;
  gap: 3rem;
  align-items: start;
}
.contato__info .section-title { margin-bottom: 0.75rem; }
.contato__info > p { color: var(--cor-texto-suave); margin-bottom: 2rem; }
.contato__endereco { display: flex; flex-direction: column; gap: 1.25rem; }
.contato__item { display: flex; gap: 1rem; align-items: flex-start; }
.contato__icon { width: 22px; height: 22px; flex-shrink: 0; color: var(--cor-laranja); margin-top: 0.125rem; }
.contato__item strong { display: block; font-size: 0.875rem; color: var(--cor-texto-suave); margin-bottom: 0.25rem; }
.contato__item a { color: var(--cor-azul); font-weight: 500; }
.contato__item a:hover { text-decoration: underline; }
.contato__item p { font-size: 0.9375rem; }

/* FORMULÁRIO */
.contato__form-wrapper {
  background: var(--cor-branco);
  border-radius: calc(var(--raio) * 2);
  padding: 2rem;
  box-shadow: var(--sombra-card);
}
.form { display: flex; flex-direction: column; gap: 1.25rem; }
.form__honeypot { position: absolute; left: -9999px; visibility: hidden; }
.form__group { display: flex; flex-direction: column; gap: 0.375rem; }
.form__label { font-size: 0.875rem; font-weight: 500; color: var(--cor-texto); }
.form__input {
  width: 100%;
  padding: 0.75rem 1rem;
  border: 1.5px solid var(--cor-cinza-borda);
  border-radius: var(--raio);
  font-size: 0.9375rem;
  font-family: inherit;
  color: var(--cor-texto);
  background: var(--cor-branco);
  transition: border-color var(--transicao), box-shadow var(--transicao);
  min-height: 48px;
}
.form__input:focus {
  outline: none;
  border-color: var(--cor-azul);
  box-shadow: 0 0 0 3px rgba(26,58,92,.15);
}
.form__input.is-invalid { border-color: #c0392b; }
.form__textarea { resize: vertical; min-height: 120px; }
.form__select { appearance: none; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%231a3a5c' stroke-width='2'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E"); background-repeat: no-repeat; background-position: right 1rem center; background-size: 16px; padding-right: 2.5rem; }
.form__group--checkbox { flex-direction: row; align-items: flex-start; }
.form__label-check { display: flex; gap: 0.625rem; font-size: 0.875rem; color: var(--cor-texto-suave); cursor: pointer; }
.form__label-check input { width: 18px; height: 18px; flex-shrink: 0; margin-top: 0.125rem; accent-color: var(--cor-azul); cursor: pointer; }
.form__error { font-size: 0.8125rem; color: #c0392b; min-height: 1.25rem; }
.form__aviso {
  display: flex; align-items: flex-start; gap: 0.5rem;
  background: rgba(37,211,102,.08);
  border: 1px solid rgba(37,211,102,.3);
  border-radius: var(--raio);
  padding: 0.875rem;
  font-size: 0.875rem;
  color: var(--cor-texto-suave);
}
.form__aviso svg { width: 18px; height: 18px; flex-shrink: 0; color: var(--cor-verde-wa); margin-top: 1px; }
.form__success {
  background: rgba(37,211,102,.1);
  border: 1px solid rgba(37,211,102,.4);
  border-radius: var(--raio);
  padding: 1rem;
  text-align: center;
  color: #1a7a3e;
  font-weight: 600;
}

/* ── RODAPÉ ── */
.footer { background: var(--cor-azul-escuro); color: rgba(255,255,255,.8); }
.footer__inner {
  display: grid;
  gap: 2.5rem;
  padding-block: 3rem;
}
.footer__brand img { opacity: .85; height: 56px; width: auto; max-width: 200px; object-fit: contain; }
.footer__slogan { font-size: 0.875rem; color: rgba(255,255,255,.55); margin-top: 0.75rem; font-style: italic; }
.footer__nav ul { display: flex; flex-direction: column; gap: 0.625rem; }
.footer__nav a { font-size: 0.9375rem; transition: color var(--transicao); }
.footer__nav a:hover { color: var(--cor-laranja); }
.footer__contato { display: flex; flex-direction: column; gap: 0.5rem; }
.footer__contato a { font-size: 0.9375rem; transition: color var(--transicao); }
.footer__contato a:hover { color: var(--cor-laranja); }
.footer__meio-ambiente {
  border-top: 1px solid rgba(255,255,255,.1);
  padding-block: 1.25rem;
}
.footer__meio-ambiente p { font-size: 0.8125rem; color: rgba(255,255,255,.5); line-height: 1.7; }
.footer__bottom {
  border-top: 1px solid rgba(255,255,255,.07);
  padding-block: 1rem;
}
.footer__bottom p { font-size: 0.8125rem; color: rgba(255,255,255,.35); text-align: center; }

/* ── WhatsApp FAB ── */
.whatsapp-fab {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  z-index: 100;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--cor-verde-wa);
  color: var(--cor-branco);
  padding: 0.75rem 1.25rem 0.75rem 0.875rem;
  border-radius: 50px;
  box-shadow: 0 4px 20px rgba(37,211,102,.45);
  font-weight: 600;
  font-size: 0.9375rem;
  transition: background var(--transicao), box-shadow var(--transicao), transform var(--transicao);
}
.whatsapp-fab:hover, .whatsapp-fab:focus-visible {
  background: var(--cor-verde-wa-hover);
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(37,211,102,.55);
}
.whatsapp-fab svg { width: 24px; height: 24px; }
.whatsapp-fab__label { display: none; }

/* ── Responsivo ── */
@media (min-width: 600px) {
  .produtos__grid { grid-template-columns: 1fr 1fr; }
  .diferenciais__grid { grid-template-columns: 1fr 1fr; }
  .whatsapp-fab__label { display: inline; }
}

@media (min-width: 900px) {
  .header__menu-btn { display: none; }
  .header__nav { display: block; }
  .sobre__inner { grid-template-columns: 1fr 1fr; }
  .servicos__inner { grid-template-columns: 1fr 1fr; }
  .contato__inner { grid-template-columns: 1fr 1.1fr; }
  .footer__inner { grid-template-columns: 1.5fr 1fr 1fr; }
  .produtos__grid { grid-template-columns: repeat(3, 1fr); }
  .diferenciais__grid { grid-template-columns: repeat(4, 1fr); }
}

@media (min-width: 1200px) {
  :root { --padding-x: 2rem; }
  .hero__content { padding-block: 6rem 5rem; }
}