/* ==========================================================================
   Sucatas Bueno Chapecó — folha de estilos principal
   Paleta da marca: verde #273F2D | sálvia #C0CDC4 | detalhe #77B255
   ========================================================================== */

:root {
  --verde: #273F2D;
  --verde-escuro: #1E3223;
  --salvia: #C0CDC4;
  --salvia-escura: #AEBCB2;
  --icone: #77B255;
  --texto: #1A1A1A;
  --texto-suave: #4C5A50;
  --branco: #FFFFFF;
  --borda: #C9D2CB;
  --container: 1200px;
  --raio: 14px;
  --sombra: 0 6px 20px rgba(20, 32, 24, .09);
  --sombra-forte: 0 16px 38px rgba(20, 32, 24, .16);
  --transicao: 220ms ease;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: 'Poppins', system-ui, -apple-system, 'Segoe UI', Arial, sans-serif;
  font-weight: 400;
  font-size: 16px;
  line-height: 1.65;
  color: var(--texto);
  background: var(--branco);
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; height: auto; }

a { color: var(--verde); }

.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

.container-estreito { max-width: 900px; }

.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;
}

/* --------------------------------------------------------------------------
   Barra superior
   -------------------------------------------------------------------------- */
.topbar {
  background: var(--verde);
  color: var(--branco);
  font-size: 13.5px;
}

.topbar .container {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 14px 42px;
  padding-top: 11px;
  padding-bottom: 11px;
}

.topbar a {
  color: var(--branco);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color var(--transicao);
}

.topbar a:hover { border-bottom-color: rgba(255, 255, 255, .6); }

.topbar-item {
  display: inline-flex;
  align-items: center;
  gap: 9px;
}

.topbar-item svg {
  width: 16px;
  height: 16px;
  flex: 0 0 auto;
  color: var(--icone);
}

/* --------------------------------------------------------------------------
   Cabeçalho
   -------------------------------------------------------------------------- */
.site-header {
  background: var(--branco);
  border-bottom: 1px solid #EDF0ED;
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding-top: 18px;
  padding-bottom: 18px;
}

.logo { display: inline-flex; align-items: center; }
.logo img { height: 54px; width: auto; }

.nav { display: flex; align-items: center; gap: 40px; }

.nav-links {
  display: flex;
  align-items: center;
  gap: 34px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-links a {
  font-size: 15.5px;
  font-weight: 400;
  color: var(--texto);
  text-decoration: none;
  padding-bottom: 2px;
  border-bottom: 2px solid transparent;
  transition: color var(--transicao), border-color var(--transicao);
}

.nav-links a:hover { color: var(--verde); border-bottom-color: var(--icone); }

.redes { display: flex; align-items: center; gap: 12px; }

.redes a {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: var(--verde);
  color: var(--branco);
  transition: background var(--transicao), transform var(--transicao);
}

.redes a:hover { background: var(--icone); transform: translateY(-2px); }
.redes svg { width: 18px; height: 18px; }

.menu-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border: 1px solid var(--borda);
  border-radius: 8px;
  background: var(--branco);
  cursor: pointer;
  color: var(--verde);
}

.menu-toggle svg { width: 22px; height: 22px; }

/* --------------------------------------------------------------------------
   Hero
   -------------------------------------------------------------------------- */
.hero {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 560px;
  padding: 72px 24px;
  background-color: #55604F;
  background-image: url("../img/hero-sucatas.jpg");
  background-size: cover;
  background-position: center;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: rgba(23, 35, 26, .22);
}

.hero-card {
  position: relative;
  max-width: 800px;
  padding: 48px 56px;
  border-radius: 24px;
  background: rgba(255, 255, 255, .94);
  box-shadow: 0 24px 60px rgba(12, 20, 14, .22);
  text-align: center;
}

.hero-eyebrow {
  margin: 0 0 12px;
  font-size: 14px;
  color: var(--texto-suave);
  letter-spacing: .01em;
}

.hero h1 {
  margin: 0;
  font-size: clamp(27px, 3.1vw, 40px);
  line-height: 1.18;
  font-weight: 700;
  color: #101710;
}

.hero-texto {
  max-width: 620px;
  margin: 20px auto 30px;
  font-size: 16.5px;
  color: #2C342E;
}

.hl {
  font-style: italic;
  border-bottom: 1.5px solid var(--icone);
}

/* --------------------------------------------------------------------------
   Botões
   -------------------------------------------------------------------------- */
.btn {
  display: inline-block;
  padding: 15px 34px;
  border: 0;
  border-radius: 5px;
  font-family: inherit;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: .07em;
  text-transform: uppercase;
  text-decoration: none;
  text-align: center;
  cursor: pointer;
  transition: background var(--transicao), color var(--transicao), transform var(--transicao), box-shadow var(--transicao);
}

.btn-dark { background: var(--verde); color: var(--branco); }
.btn-dark:hover { background: var(--verde-escuro); box-shadow: var(--sombra); }

.btn-sage { background: var(--salvia); color: var(--verde); }
.btn-sage:hover { background: var(--salvia-escura); box-shadow: var(--sombra); }

.btn-group {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  justify-content: center;
  margin-top: 40px;
}

/* --------------------------------------------------------------------------
   Faixa de diferenciais
   -------------------------------------------------------------------------- */
.band {
  background: var(--verde);
  color: var(--branco);
}

.band .container {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-around;
  gap: 26px 48px;
  padding-top: 32px;
  padding-bottom: 32px;
}

.band-item {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 14px;
  font-weight: 500;
  letter-spacing: .03em;
  text-transform: uppercase;
  line-height: 1.35;
  max-width: 320px;
}

.band-item svg { width: 40px; height: 40px; flex: 0 0 auto; color: var(--icone); }

/* --------------------------------------------------------------------------
   Seções
   -------------------------------------------------------------------------- */
.section { padding: 88px 0; }
.section-verde { background: var(--verde); color: var(--branco); }

.section-title {
  position: relative;
  margin: 0 0 26px;
  padding-bottom: 16px;
  font-size: clamp(24px, 2.5vw, 32px);
  font-weight: 300;
  font-style: italic;
  line-height: 1.25;
  color: var(--verde);
}

.section-title::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 170px;
  height: 1px;
  background: currentColor;
  opacity: .55;
}

.section-verde .section-title { color: var(--branco); }

.section-title.center { text-align: center; }
.section-title.center::after { left: 50%; transform: translateX(-50%); }

.section-sub {
  margin: -8px 0 0;
  font-size: 15.5px;
  color: var(--texto-suave);
}

.section-verde .section-sub { color: rgba(255, 255, 255, .9); }

.section-lead {
  max-width: 1000px;
  margin: 0 0 16px;
  font-size: 15.5px;
  color: #2F3A32;
}

.subtitulo-estrutura {
  margin: 46px 0 18px;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: .04em;
  text-transform: uppercase;
  color: var(--verde);
}

/* --------------------------------------------------------------------------
   Cards de materiais
   -------------------------------------------------------------------------- */
.materiais-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 22px;
  margin-top: 42px;
}

.material-card {
  width: calc((100% - 66px) / 4);
  min-width: 200px;
  display: block;
  border-radius: 10px;
  overflow: hidden;
  background: var(--branco);
  box-shadow: 0 4px 14px rgba(20, 32, 24, .08);
  text-decoration: none;
  transition: transform var(--transicao), box-shadow var(--transicao);
}

.material-card:hover { transform: translateY(-5px); box-shadow: var(--sombra-forte); }

.material-card .material-nome {
  display: block;
  padding: 13px 10px;
  background: var(--verde);
  color: var(--branco);
  font-size: 15px;
  font-weight: 500;
  text-align: center;
  transition: background var(--transicao);
}

.material-card:hover .material-nome { background: var(--verde-escuro); }

.material-card img {
  display: block;
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

/* --------------------------------------------------------------------------
   Faixa de sustentabilidade
   -------------------------------------------------------------------------- */
.quote-band {
  position: relative;
  padding: 104px 24px;
  background-color: #4B5A4C;
  background-image: url("../img/banner-sustentabilidade.jpg");
  background-size: cover;
  background-position: center;
  color: var(--branco);
  text-align: center;
}

.quote-band::before {
  content: "";
  position: absolute;
  inset: 0;
  background: rgba(39, 63, 45, .38);
}

.quote-band blockquote { position: relative; margin: 0; }

.quote-band h3 {
  margin: 0 0 12px;
  font-size: clamp(21px, 2.3vw, 30px);
  font-weight: 300;
  letter-spacing: .06em;
  text-transform: uppercase;
}

.quote-band p {
  margin: 0;
  font-size: 15.5px;
  font-style: italic;
  opacity: .95;
}

/* --------------------------------------------------------------------------
   Como funciona a coleta
   -------------------------------------------------------------------------- */
.steps-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
  margin-top: 42px;
}

.step {
  padding: 30px 26px;
  border-radius: 16px;
  background: var(--salvia);
  color: var(--verde);
}

.step svg { display: block; width: 40px; height: 40px; margin: 0 auto 18px; color: var(--verde); }

.step h3 {
  margin: 0 0 12px;
  font-size: 14.5px;
  font-weight: 600;
  letter-spacing: .03em;
  text-transform: uppercase;
  text-align: center;
}

.step p { margin: 0; font-size: 13.5px; line-height: 1.6; color: #26362B; }

/* --------------------------------------------------------------------------
   Contato
   -------------------------------------------------------------------------- */
.contato-grid {
  display: grid;
  grid-template-columns: 1fr 1.05fr;
  gap: 64px;
  margin-top: 48px;
  align-items: start;
}

.contato-info {
  display: flex;
  flex-direction: column;
  gap: 34px;
  align-items: flex-end;
  text-align: right;
}

.contato-bloco h3 {
  margin: 0 0 12px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .05em;
  text-transform: uppercase;
  color: var(--verde);
}

.contato-linha {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 10px;
  margin-bottom: 8px;
  font-size: 15px;
}

.contato-linha svg { width: 18px; height: 18px; flex: 0 0 auto; color: var(--icone); }
.contato-linha a { color: #2C342E; text-decoration: none; border-bottom: 1px solid transparent; }
.contato-linha a:hover { border-bottom-color: var(--icone); }

.form { display: block; }

.campo { margin-bottom: 18px; }

.campo label {
  display: block;
  margin-bottom: 6px;
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: .05em;
  text-transform: uppercase;
  color: var(--verde);
}

.campo input,
.campo textarea {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--borda);
  border-radius: 5px;
  background: var(--branco);
  font-family: inherit;
  font-size: 14.5px;
  color: var(--texto);
}

.campo textarea { min-height: 130px; resize: vertical; }

.campo input:focus,
.campo textarea:focus {
  outline: 2px solid var(--icone);
  outline-offset: 1px;
  border-color: var(--verde);
}

.campo .erro {
  display: none;
  margin-top: 6px;
  font-size: 12.5px;
  color: #B3261E;
}

.campo.invalido input,
.campo.invalido textarea { border-color: #B3261E; }
.campo.invalido .erro { display: block; }

.form-retorno {
  display: none;
  margin-top: 16px;
  padding: 14px 16px;
  border-radius: 6px;
  background: #EAF2E6;
  border: 1px solid var(--icone);
  font-size: 14px;
  color: #24462B;
}

.form-retorno.ativo { display: block; }

.form-obs { margin: 14px 0 0; font-size: 13px; color: var(--texto-suave); }

/* --------------------------------------------------------------------------
   Sobre / estrutura
   -------------------------------------------------------------------------- */
.estrutura {
  display: grid;
  grid-template-columns: 1.55fr 1fr;
  gap: 24px;
  align-items: start;
}

.estrutura-coluna { display: grid; gap: 24px; }

.estrutura-item h3 {
  margin: 0 0 10px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .05em;
  text-transform: uppercase;
  color: var(--verde);
}

.estrutura-item img {
  display: block;
  width: 100%;
  border-radius: 10px;
  object-fit: cover;
  box-shadow: var(--sombra);
}

.estrutura-item.grande img { aspect-ratio: 4 / 3; }
.estrutura-item.pequeno img { aspect-ratio: 16 / 10; }

/* --------------------------------------------------------------------------
   Princípios
   -------------------------------------------------------------------------- */
.principios-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
  margin-top: 44px;
}

.principio {
  padding: 32px 28px;
  border-radius: 16px;
  background: var(--salvia);
  color: var(--verde);
  text-align: center;
}

.principio svg { width: 46px; height: 46px; margin: 0 auto 16px; display: block; color: var(--verde); }

.principio h3 {
  margin: 0 0 14px;
  font-size: 14.5px;
  font-weight: 600;
  letter-spacing: .05em;
  text-transform: uppercase;
}

.principio p { margin: 0; font-size: 13.5px; line-height: 1.65; color: #26362B; }

/* --------------------------------------------------------------------------
   Rodapé
   -------------------------------------------------------------------------- */
.site-footer { background: var(--salvia); color: var(--verde); padding: 62px 0 50px; }

.footer-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.8fr 1.1fr;
  gap: 46px;
}

.footer-logo img { height: 54px; width: auto; margin-bottom: 20px; }

.site-footer .redes a { background: var(--verde); color: var(--salvia); }
.site-footer .redes a:hover { background: var(--icone); color: var(--branco); }

.footer-titulo {
  margin: 0 0 16px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .05em;
  text-transform: uppercase;
}

.footer-menu a {
  display: block;
  margin-bottom: 10px;
  font-size: 14.5px;
  color: var(--verde);
  text-decoration: none;
}

.footer-menu a:hover { text-decoration: underline; }

.footer-contato p { margin: 0 0 14px; font-size: 14px; line-height: 1.5; }
.footer-contato strong { display: block; font-size: 12.5px; letter-spacing: .04em; text-transform: uppercase; margin-bottom: 4px; }
.footer-contato a { color: var(--verde); text-decoration: none; }
.footer-contato a:hover { text-decoration: underline; }

.copy {
  background: var(--verde);
  color: var(--branco);
  text-align: center;
  font-size: 13px;
  padding: 18px 24px;
}

.copy p { margin: 0; }

/* --------------------------------------------------------------------------
   Botão flutuante do WhatsApp
   -------------------------------------------------------------------------- */
.whats-float {
  position: fixed;
  right: 22px;
  bottom: 22px;
  z-index: 60;
  display: grid;
  place-items: center;
  width: 58px;
  height: 58px;
  border-radius: 50%;
  background: #25D366;
  box-shadow: 0 10px 24px rgba(12, 20, 14, .28);
  transition: transform var(--transicao), box-shadow var(--transicao);
}

.whats-float:hover { transform: scale(1.06); box-shadow: 0 14px 30px rgba(12, 20, 14, .34); }
.whats-float svg { width: 32px; height: 32px; fill: var(--branco); }

/* --------------------------------------------------------------------------
   Páginas internas (política / termos)
   -------------------------------------------------------------------------- */
.pagina-legal { padding: 72px 0 88px; }
.pagina-legal h1 { font-size: clamp(26px, 2.8vw, 36px); font-weight: 300; font-style: italic; color: var(--verde); margin: 0 0 8px; }
.pagina-legal .atualizado { font-size: 13.5px; color: var(--texto-suave); margin: 0 0 34px; }
.pagina-legal h2 { font-size: 18px; font-weight: 600; color: var(--verde); margin: 34px 0 10px; }
.pagina-legal p, .pagina-legal li { font-size: 15px; color: #2F3A32; }
.pagina-legal ul { padding-left: 22px; }

/* --------------------------------------------------------------------------
   Animação de entrada
   -------------------------------------------------------------------------- */
.reveal {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 520ms ease, transform 520ms ease;
}

.reveal.visivel { opacity: 1; transform: none; }

/* --------------------------------------------------------------------------
   Responsivo
   -------------------------------------------------------------------------- */
@media (max-width: 1080px) {
  .material-card { width: calc((100% - 44px) / 3); }
  .steps-grid { grid-template-columns: repeat(2, 1fr); }
  .principios-grid { grid-template-columns: 1fr; }
  .contato-grid { grid-template-columns: 1fr; gap: 48px; }
  .contato-info { align-items: flex-start; text-align: left; }
  .contato-linha { justify-content: flex-start; }
  .estrutura { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 900px) {
  .menu-toggle { display: grid; place-items: center; }

  .nav {
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    z-index: 50;
    display: none;
    flex-direction: column;
    align-items: flex-start;
    gap: 18px;
    padding: 22px 24px 26px;
    background: var(--branco);
    border-bottom: 1px solid #E4E9E5;
    box-shadow: 0 18px 30px rgba(20, 32, 24, .12);
  }

  .nav.aberto { display: flex; }

  .nav-links { flex-direction: column; align-items: flex-start; gap: 16px; }

  .site-header .container { position: relative; }
}

@media (max-width: 760px) {
  .section { padding: 64px 0; }
  .hero { min-height: 0; padding: 54px 18px; }
  .hero-card { padding: 34px 26px; border-radius: 18px; }
  .band .container { flex-direction: column; align-items: flex-start; gap: 22px; }
  .material-card { width: calc((100% - 22px) / 2); min-width: 0; }
  .steps-grid { grid-template-columns: 1fr; }
  .quote-band { padding: 76px 20px; }
  .footer-grid { grid-template-columns: 1fr; gap: 34px; }
  .btn { padding: 14px 26px; width: 100%; }
  .btn-group { gap: 12px; }
  .logo img { height: 44px; }
}

@media (max-width: 420px) {
  .material-card { width: 100%; }
  .topbar .container { gap: 10px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .material-card:hover, .redes a:hover, .whats-float:hover { transform: none; }
}