/* ============================================================
   ARAUCÁRIA ENGENHARIA — CSS Principal
   Sem WordPress. Sem dependências de framework.
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Montserrat:wght@400;500;600;700;800&family=Open+Sans:wght@400;500;600&display=swap');

/* === VARIÁVEIS === */
:root {
  --verde-escuro: #2d7a1f;
  --verde-medio: #3a9427;
  --verde-claro: #4db840;
  --ciano: #00bcd4;
  --ciano-escuro: #0097a7;
  --preto: #1a1a1a;
  --cinza-escuro: #333333;
  --cinza-medio: #666666;
  --cinza-claro: #f5f5f5;
  --branco: #ffffff;
  --sombra: 0 4px 20px rgba(0,0,0,0.1);
  --sombra-hover: 0 8px 30px rgba(0,0,0,0.18);
  --radius: 6px;
  --transition: all 0.3s ease;
  --fonte-titulo: 'Montserrat', sans-serif;
  --fonte-texto: 'Open Sans', sans-serif;
}

/* === RESET === */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: var(--fonte-texto);
  color: var(--cinza-escuro);
  background: var(--branco);
  line-height: 1.6;
  overflow-x: hidden;
}
img { max-width: 100%; height: auto; display: block; }
a { text-decoration: none; color: inherit; }
ul { list-style: none; }

/* === UTILITÁRIOS === */
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.section-title {
  font-family: var(--fonte-titulo);
  font-size: 2rem;
  font-weight: 700;
  color: var(--preto);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 12px;
}
.section-subtitle {
  font-size: 1rem;
  color: var(--cinza-medio);
  margin-bottom: 48px;
  max-width: 600px;
}
.section-header { text-align: center; margin-bottom: 48px; }
.section-header .section-title::after {
  content: '';
  display: block;
  width: 60px;
  height: 4px;
  background: var(--verde-claro);
  margin: 12px auto 0;
}
.text-left .section-header { text-align: left; }
.text-left .section-header .section-title::after { margin-left: 0; }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 28px;
  border-radius: var(--radius);
  font-family: var(--fonte-titulo);
  font-weight: 700;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  cursor: pointer;
  border: 2px solid transparent;
  transition: var(--transition);
}
.btn-primary {
  background: var(--ciano);
  color: var(--branco);
  border-color: var(--ciano);
}
.btn-primary:hover { background: var(--ciano-escuro); border-color: var(--ciano-escuro); transform: translateY(-2px); box-shadow: var(--sombra-hover); }
.btn-secondary {
  background: var(--verde-escuro);
  color: var(--branco);
  border-color: var(--verde-escuro);
}
.btn-secondary:hover { background: var(--verde-medio); border-color: var(--verde-medio); transform: translateY(-2px); box-shadow: var(--sombra-hover); }
.btn-outline {
  background: transparent;
  color: var(--branco);
  border-color: var(--branco);
}
.btn-outline:hover { background: var(--branco); color: var(--verde-escuro); }

/* === HEADER === */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  background: var(--branco);
  box-shadow: 0 2px 10px rgba(0,0,0,0.08);
  transition: var(--transition);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 80px;
}
.site-logo img { height: 58px; width: auto; }

.main-nav { display: flex; align-items: center; gap: 4px; }
.main-nav a {
  font-family: var(--fonte-titulo);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--cinza-escuro);
  padding: 8px 14px;
  border-radius: 4px;
  text-transform: uppercase;
  letter-spacing: 0.3px;
  transition: var(--transition);
  position: relative;
}
.main-nav a::after {
  content: '';
  position: absolute;
  bottom: 2px; left: 14px; right: 14px;
  height: 2px;
  background: var(--ciano);
  transform: scaleX(0);
  transition: transform 0.3s ease;
}
.main-nav a:hover, .main-nav a.active { color: var(--verde-escuro); }
.main-nav a:hover::after, .main-nav a.active::after { transform: scaleX(1); }

.header-btns { display: flex; gap: 10px; }

/* Mobile menu toggle */
.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 8px;
  background: none;
  border: none;
}
.menu-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--cinza-escuro);
  transition: var(--transition);
}
.menu-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.menu-toggle.open span:nth-child(2) { opacity: 0; }
.menu-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* === HERO SLIDER === */
.hero {
  margin-top: 80px;
  position: relative;
  height: 520px;
  overflow: hidden;
  background: var(--preto);
}
.hero-slides { display: flex; height: 100%; transition: transform 0.7s cubic-bezier(0.77,0,0.175,1); }
.hero-slide {
  min-width: 100%;
  height: 100%;
  position: relative;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
}
.hero-slide::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to right, rgba(0,0,0,0.65) 0%, rgba(0,0,0,0.2) 60%, transparent 100%);
}
.hero-content {
  position: absolute;
  bottom: 80px;
  left: 80px;
  z-index: 2;
  color: var(--branco);
  max-width: 520px;
}
.hero-content h2 {
  font-family: var(--fonte-titulo);
  font-size: 2.4rem;
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 12px;
  text-shadow: 0 2px 8px rgba(0,0,0,0.3);
}
.hero-content p {
  font-size: 1.05rem;
  margin-bottom: 24px;
  opacity: 0.92;
}
.hero-arrow {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  z-index: 3;
  background: rgba(255,255,255,0.15);
  backdrop-filter: blur(4px);
  border: 1px solid rgba(255,255,255,0.3);
  color: white;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition);
  font-size: 1.2rem;
}
.hero-arrow:hover { background: rgba(255,255,255,0.3); }
.hero-arrow.prev { left: 20px; }
.hero-arrow.next { right: 20px; }
.hero-dots {
  position: absolute;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 3;
  display: flex;
  gap: 8px;
}
.hero-dot {
  width: 10px; height: 10px;
  border-radius: 50%;
  background: rgba(255,255,255,0.5);
  cursor: pointer;
  transition: var(--transition);
  border: none;
}
.hero-dot.active { background: var(--ciano); transform: scale(1.3); }

/* === SEÇÃO QUEM SOMOS (Home cards) === */
.quem-somos { padding: 80px 0; background: var(--cinza-claro); }
.qs-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
}
.qs-card {
  background: var(--branco);
  border-radius: var(--radius);
  padding: 40px 30px;
  text-align: center;
  box-shadow: var(--sombra);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}
.qs-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 4px;
  background: linear-gradient(to right, var(--verde-escuro), var(--ciano));
  transform: scaleX(0);
  transition: transform 0.3s ease;
}
.qs-card:hover { transform: translateY(-6px); box-shadow: var(--sombra-hover); }
.qs-card:hover::before { transform: scaleX(1); }
.qs-card-icon {
  width: 70px; height: 70px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--verde-escuro), var(--verde-claro));
  display: flex; align-items: center; justify-content: center;
  margin: 0 auto 20px;
  font-size: 1.8rem;
  color: white;
}
.qs-card h3 {
  font-family: var(--fonte-titulo);
  font-size: 1rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--preto);
  margin-bottom: 12px;
}
.qs-card p { font-size: 0.9rem; color: var(--cinza-medio); line-height: 1.7; margin-bottom: 20px; }
.qs-card a {
  font-family: var(--fonte-titulo);
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--ciano);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: var(--transition);
}
.qs-card a:hover { color: var(--verde-escuro); gap: 10px; }

/* === ÚLTIMOS PROJETOS (Home) === */
.projetos-home { padding: 80px 0; }
.projetos-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.projeto-card {
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--sombra);
  transition: var(--transition);
  position: relative;
}
.projeto-card:hover { transform: translateY(-6px); box-shadow: var(--sombra-hover); }
.projeto-card-img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  transition: transform 0.5s ease;
}
.projeto-card:hover .projeto-card-img { transform: scale(1.05); }
.projeto-card-body {
  padding: 16px;
  background: var(--branco);
}
.projeto-card-body h4 {
  font-family: var(--fonte-titulo);
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--preto);
  margin-bottom: 6px;
}
.projeto-card-tag {
  display: inline-block;
  font-size: 0.75rem;
  color: var(--ciano);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.projetos-home-cta { text-align: center; margin-top: 40px; }

/* === PAGE HERO (banner interno) === */
.page-hero {
  margin-top: 80px;
  background: linear-gradient(135deg, var(--verde-escuro) 0%, var(--verde-medio) 60%, var(--ciano) 100%);
  padding: 64px 0;
  text-align: center;
  color: var(--branco);
  position: relative;
  overflow: hidden;
}
.page-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.05'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}
.page-hero h1 {
  font-family: var(--fonte-titulo);
  font-size: 2.2rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 2px;
  position: relative;
  margin-bottom: 8px;
}
.page-hero p { font-size: 1rem; opacity: 0.85; position: relative; }

/* === EMPRESA PAGE === */
.empresa-section { padding: 80px 0; }
.empresa-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}
.empresa-text p { margin-bottom: 18px; color: var(--cinza-medio); line-height: 1.8; }
.empresa-img img {
  border-radius: var(--radius);
  box-shadow: var(--sombra-hover);
  width: 100%;
}
.principios { padding: 80px 0; background: var(--cinza-claro); }
.principios-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
}
.principio-card {
  background: var(--branco);
  padding: 36px 30px;
  border-radius: var(--radius);
  box-shadow: var(--sombra);
  border-left: 4px solid var(--verde-claro);
  transition: var(--transition);
}
.principio-card:hover { transform: translateY(-4px); box-shadow: var(--sombra-hover); border-left-color: var(--ciano); }
.principio-card h3 {
  font-family: var(--fonte-titulo);
  font-size: 1rem;
  font-weight: 700;
  color: var(--verde-escuro);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.principio-card p { font-size: 0.9rem; color: var(--cinza-medio); line-height: 1.8; }

/* === SERVIÇOS PAGE === */
.servicos-section { padding: 80px 0; }
.servicos-intro { padding: 60px 0 0; }
.servicos-intro p { max-width: 800px; margin: 0 auto 48px; text-align: center; color: var(--cinza-medio); font-size: 1rem; line-height: 1.8; }
.servicos-categorias { margin-bottom: 60px; }
.categoria-titulo {
  font-family: var(--fonte-titulo);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--verde-escuro);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  padding: 12px 0 12px 16px;
  border-left: 4px solid var(--ciano);
  margin-bottom: 20px;
  margin-top: 40px;
}
.servicos-lista {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 12px;
}
.servico-item {
  background: var(--branco);
  border: 1px solid #e8e8e8;
  border-radius: var(--radius);
  padding: 16px 20px;
  display: flex;
  align-items: flex-start;
  gap: 12px;
  transition: var(--transition);
}
.servico-item:hover {
  border-color: var(--ciano);
  box-shadow: var(--sombra);
  transform: translateX(4px);
}
.servico-item::before {
  content: '✓';
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 24px;
  height: 24px;
  background: var(--verde-claro);
  color: white;
  border-radius: 50%;
  font-size: 0.75rem;
  font-weight: 700;
  margin-top: 1px;
}
.servico-item span { font-size: 0.9rem; color: var(--cinza-escuro); line-height: 1.5; }

/* === OBRAS REALIZADAS === */
.obras-section { padding: 80px 0; }
.filtros {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  justify-content: center;
  margin-bottom: 48px;
}
.filtro-btn {
  padding: 9px 22px;
  border-radius: 30px;
  border: 2px solid #e0e0e0;
  background: var(--branco);
  font-family: var(--fonte-titulo);
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.4px;
  cursor: pointer;
  color: var(--cinza-medio);
  transition: var(--transition);
}
.filtro-btn:hover { border-color: var(--ciano); color: var(--ciano); }
.filtro-btn.active { background: var(--ciano); border-color: var(--ciano); color: var(--branco); }
.obras-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 24px;
}
.obra-card {
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--sombra);
  cursor: pointer;
  position: relative;
  transition: var(--transition);
}
.obra-card:hover { transform: translateY(-6px); box-shadow: var(--sombra-hover); }
.obra-card img { width: 100%; height: 220px; object-fit: cover; transition: transform 0.5s ease; display: block; }
.obra-card:hover img { transform: scale(1.06); }
.obra-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(0,0,0,0.75) 0%, transparent 50%);
  display: flex;
  align-items: flex-end;
  padding: 20px;
  opacity: 0;
  transition: opacity 0.3s ease;
}
.obra-card:hover .obra-overlay { opacity: 1; }
.obra-overlay h4 {
  font-family: var(--fonte-titulo);
  font-size: 0.95rem;
  font-weight: 700;
  color: white;
}
.obra-overlay span {
  display: block;
  font-size: 0.78rem;
  color: rgba(255,255,255,0.8);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 4px;
}
.obra-plus {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) scale(0);
  width: 48px; height: 48px;
  background: var(--ciano);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 1.4rem;
  transition: transform 0.3s ease;
}
.obra-card:hover .obra-plus { transform: translate(-50%, -50%) scale(1); }

/* Modal */
.modal-overlay {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 2000;
  background: rgba(0,0,0,0.85);
  align-items: center;
  justify-content: center;
  padding: 20px;
}
.modal-overlay.open { display: flex; }
.modal-box {
  background: white;
  border-radius: 8px;
  max-width: 700px;
  width: 100%;
  overflow: hidden;
  position: relative;
  animation: modalIn 0.3s ease;
}
@keyframes modalIn { from { opacity:0; transform: scale(0.9); } to { opacity:1; transform: scale(1); } }
.modal-close {
  position: absolute;
  top: 12px; right: 12px;
  background: rgba(0,0,0,0.5);
  border: none;
  color: white;
  width: 32px; height: 32px;
  border-radius: 50%;
  font-size: 1.1rem;
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  z-index: 1;
}
.modal-img { width: 100%; max-height: 460px; object-fit: cover; }
.modal-info { padding: 20px 24px; }
.modal-info h3 { font-family: var(--fonte-titulo); font-size: 1.1rem; font-weight: 700; margin-bottom: 4px; }
.modal-info p { font-size: 0.9rem; color: var(--cinza-medio); }

/* === CLIENTES === */
.clientes-section { padding: 80px 0; }
.clientes-intro { text-align: center; max-width: 600px; margin: 0 auto 48px; color: var(--cinza-medio); }
.clientes-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 20px;
  align-items: center;
}
.cliente-logo {
  padding: 16px;
  border: 1px solid #eee;
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
  background: white;
}
.cliente-logo:hover { box-shadow: var(--sombra); border-color: var(--ciano); transform: scale(1.04); }
.cliente-logo img { max-height: 70px; width: auto; object-fit: contain; filter: grayscale(1); transition: var(--transition); }
.cliente-logo:hover img { filter: grayscale(0); }

/* === CONTATO / ORÇAMENTO === */
.contato-section { padding: 80px 0; }
.contato-grid {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: 60px;
}
.contato-info h3 {
  font-family: var(--fonte-titulo);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--preto);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 24px;
}
.contato-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: 24px;
  padding-bottom: 24px;
  border-bottom: 1px solid #eee;
}
.contato-item:last-child { border-bottom: none; }
.contato-icon {
  min-width: 44px; height: 44px;
  background: linear-gradient(135deg, var(--verde-escuro), var(--ciano));
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  color: white;
  font-size: 1.1rem;
}
.contato-item-text strong {
  display: block;
  font-family: var(--fonte-titulo);
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--preto);
  letter-spacing: 0.3px;
  margin-bottom: 4px;
}
.contato-item-text p, .contato-item-text a {
  font-size: 0.9rem;
  color: var(--cinza-medio);
  transition: var(--transition);
}
.contato-item-text a:hover { color: var(--ciano); }

/* Formulário */
.form-card {
  background: var(--cinza-claro);
  border-radius: var(--radius);
  padding: 40px;
}
.form-card h3 {
  font-family: var(--fonte-titulo);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--preto);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 6px;
}
.form-card p { font-size: 0.9rem; color: var(--cinza-medio); margin-bottom: 28px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-group { margin-bottom: 16px; }
.form-group label {
  display: block;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--cinza-escuro);
  text-transform: uppercase;
  letter-spacing: 0.3px;
  margin-bottom: 6px;
}
.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 12px 16px;
  border: 2px solid #e0e0e0;
  border-radius: var(--radius);
  font-family: var(--fonte-texto);
  font-size: 0.9rem;
  color: var(--cinza-escuro);
  background: var(--branco);
  transition: var(--transition);
  outline: none;
}
.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  border-color: var(--ciano);
  box-shadow: 0 0 0 3px rgba(0,188,212,0.15);
}
.form-group textarea { resize: vertical; min-height: 120px; }
.form-msg {
  display: none;
  padding: 12px 16px;
  border-radius: var(--radius);
  font-size: 0.9rem;
  margin-top: 12px;
  font-weight: 600;
}
.form-msg.success { background: #e8f5e9; color: #2e7d32; border: 1px solid #a5d6a7; display: block; }
.form-msg.error { background: #ffebee; color: #c62828; border: 1px solid #ef9a9a; display: block; }

/* === MAP === */
.mapa-section { height: 400px; }
.mapa-section iframe { width: 100%; height: 100%; border: none; display: block; }

/* === FOOTER === */
.site-footer {
  background: var(--preto);
  color: rgba(255,255,255,0.8);
}
.footer-top { padding: 64px 0 40px; }
.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 40px;
}
.footer-col h4 {
  font-family: var(--fonte-titulo);
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--branco);
  margin-bottom: 20px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--verde-claro);
  display: inline-block;
}
.footer-col p { font-size: 0.88rem; line-height: 1.8; color: rgba(255,255,255,0.65); margin-bottom: 16px; }
.footer-logo { height: 50px; margin-bottom: 20px; filter: brightness(0) invert(1); }
.footer-col ul li { margin-bottom: 10px; }
.footer-col ul li a {
  font-size: 0.88rem;
  color: rgba(255,255,255,0.65);
  transition: var(--transition);
  display: flex;
  align-items: center;
  gap: 6px;
}
.footer-col ul li a::before { content: '›'; color: var(--verde-claro); font-size: 1rem; }
.footer-col ul li a:hover { color: var(--ciano); padding-left: 4px; }
.footer-contact-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin-bottom: 12px;
  font-size: 0.88rem;
  color: rgba(255,255,255,0.65);
}
.footer-contact-item i { color: var(--ciano); margin-top: 2px; min-width: 14px; }
.footer-social { display: flex; gap: 10px; margin-top: 16px; }
.footer-social a {
  width: 36px; height: 36px;
  border-radius: 50%;
  border: 1px solid rgba(255,255,255,0.2);
  display: flex; align-items: center; justify-content: center;
  color: rgba(255,255,255,0.7);
  font-size: 0.9rem;
  transition: var(--transition);
}
.footer-social a:hover { background: var(--ciano); border-color: var(--ciano); color: white; }
.footer-bottom {
  padding: 20px 0;
  border-top: 1px solid rgba(255,255,255,0.08);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.82rem;
  color: rgba(255,255,255,0.4);
}

/* WhatsApp flutuante */
.whatsapp-float {
  position: fixed;
  bottom: 24px;
  left: 24px;
  z-index: 999;
  width: 54px; height: 54px;
  background: #25d366;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 4px 16px rgba(37,211,102,0.5);
  transition: var(--transition);
  animation: pulse-wa 2.5s ease infinite;
}
.whatsapp-float:hover { transform: scale(1.1); }
.whatsapp-float svg { width: 28px; height: 28px; fill: white; }
@keyframes pulse-wa {
  0%,100% { box-shadow: 0 4px 16px rgba(37,211,102,0.5); }
  50% { box-shadow: 0 4px 28px rgba(37,211,102,0.8), 0 0 0 8px rgba(37,211,102,0.15); }
}

/* Back to top */
.back-to-top {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 999;
  width: 44px; height: 44px;
  background: var(--ciano);
  color: white;
  border-radius: 50%;
  display: none;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  cursor: pointer;
  border: none;
  box-shadow: var(--sombra);
  transition: var(--transition);
}
.back-to-top.visible { display: flex; }
.back-to-top:hover { background: var(--ciano-escuro); transform: translateY(-3px); }

/* === ANIMAÇÕES ON SCROLL === */
.animate-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.animate-in.visible { opacity: 1; transform: translateY(0); }

/* === RESPONSIVE === */
@media (max-width: 1024px) {
  .qs-grid { grid-template-columns: repeat(3, 1fr); }
  .projetos-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 30px; }
  .empresa-grid { grid-template-columns: 1fr; }
  .empresa-img { order: -1; }
}

@media (max-width: 768px) {
  .header-btns { display: none; }
  .main-nav {
    display: none;
    position: absolute;
    top: 80px; left: 0; right: 0;
    background: white;
    flex-direction: column;
    padding: 16px;
    box-shadow: 0 8px 20px rgba(0,0,0,0.1);
    gap: 0;
  }
  .main-nav.open { display: flex; }
  .main-nav a { padding: 12px 16px; border-radius: 4px; width: 100%; }
  .menu-toggle { display: flex; }
  .hero { height: 400px; }
  .hero-content { left: 24px; bottom: 60px; }
  .hero-content h2 { font-size: 1.6rem; }
  .qs-grid { grid-template-columns: 1fr; }
  .projetos-grid { grid-template-columns: repeat(2, 1fr); }
  .principios-grid { grid-template-columns: 1fr; }
  .contato-grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; gap: 8px; text-align: center; }
  .section-title { font-size: 1.5rem; }
  .clientes-grid { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 480px) {
  .projetos-grid { grid-template-columns: 1fr; }
  .clientes-grid { grid-template-columns: repeat(2, 1fr); }
  .hero-content h2 { font-size: 1.3rem; }
  .container { padding: 0 16px; }
}