/* =============================================
   KM ENGENHARIA ELÉTRICA — DESIGN SYSTEM GLOBAL
   ============================================= */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&family=Barlow+Condensed:wght@600;700;800&display=swap');

:root {
  --amarelo:     #F5C518;
  --amarelo-dark:#D4A200;
  --preto:       #0A0A0A;
  --preto-card:  #111111;
  --cinza-escuro:#1C1C1C;
  --cinza-medio: #2E2E2E;
  --cinza-claro: #9CA3AF;
  --branco:      #FFFFFF;
  --branco-soft: #F9FAFB;
  --borda:       rgba(245,197,24,0.2);
  --sombra:      0 4px 24px rgba(0,0,0,0.4);
  --sombra-hover:0 8px 40px rgba(245,197,24,0.25);
  --radius:      8px;
  --radius-lg:   16px;
  --transition:  0.3s ease;
  --font-main:   'Inter', sans-serif;
  --font-display:'Barlow Condensed', sans-serif;
}

*, *::before, *::after {
  margin: 0; padding: 0;
  box-sizing: border-box;
}

html { scroll-behavior: smooth; }

body {
  background: var(--preto);
  color: var(--branco);
  font-family: var(--font-main);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

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

/* ── UTILITÁRIOS ── */
.container {
  width: 92%;
  max-width: 1200px;
  margin: 0 auto;
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 1px;
  line-height: 1.1;
}

.section-title span { color: var(--amarelo); }

.section-subtitle {
  color: var(--cinza-claro);
  font-size: 1rem;
  margin-top: .75rem;
  max-width: 600px;
}

.label-tag {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  background: rgba(245,197,24,0.12);
  border: 1px solid var(--borda);
  color: var(--amarelo);
  font-size: .75rem;
  font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
  padding: .35rem .9rem;
  border-radius: 50px;
  margin-bottom: 1rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  padding: .85rem 2rem;
  border-radius: var(--radius);
  font-weight: 700;
  font-size: .95rem;
  transition: var(--transition);
  cursor: pointer;
  border: none;
}

.btn-primary {
  background: var(--amarelo);
  color: var(--preto);
}
.btn-primary:hover {
  background: var(--amarelo-dark);
  transform: translateY(-2px);
  box-shadow: var(--sombra-hover);
}

.btn-outline {
  background: transparent;
  color: var(--branco);
  border: 2px solid rgba(255,255,255,0.3);
}
.btn-outline:hover {
  border-color: var(--amarelo);
  color: var(--amarelo);
  transform: translateY(-2px);
}

.btn-whatsapp {
  background: #25D366;
  color: #fff;
}
.btn-whatsapp:hover {
  background: #1ebe5d;
  transform: translateY(-2px);
}

/* ── HEADER / NAV ── */
.topbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  background: rgba(10,10,10,0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(255,255,255,0.06);
  transition: var(--transition);
}

.topbar.scrolled {
  background: rgba(10,10,10,0.98);
  box-shadow: 0 2px 20px rgba(0,0,0,0.5);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: .5rem 0;
}

.logo-img img {
  height: 156px;
  width: auto;
  object-fit: contain;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: .25rem;
}

.nav-links a {
  color: rgba(255,255,255,0.8);
  font-size: .875rem;
  font-weight: 500;
  padding: .5rem .85rem;
  border-radius: var(--radius);
  transition: var(--transition);
  position: relative;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--amarelo);
  background: rgba(245,197,24,0.08);
}

.nav-cta {
  display: flex;
  align-items: center;
  gap: .75rem;
}

/* Hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: .5rem;
  background: none;
  border: none;
}
.hamburger span {
  width: 24px; height: 2px;
  background: var(--branco);
  border-radius: 2px;
  transition: var(--transition);
}
.hamburger.open span:nth-child(1) { transform: rotate(45deg) translate(5px,5px); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: rotate(-45deg) translate(5px,-5px); }

.mobile-menu {
  display: none;
  flex-direction: column;
  padding: 1rem 0 1.5rem;
  gap: .25rem;
  border-top: 1px solid rgba(255,255,255,0.06);
}
.mobile-menu a {
  color: rgba(255,255,255,0.8);
  font-size: .95rem;
  font-weight: 500;
  padding: .75rem 1rem;
  border-radius: var(--radius);
  transition: var(--transition);
}
.mobile-menu a:hover,
.mobile-menu a.active { color: var(--amarelo); background: rgba(245,197,24,0.08); }
.mobile-menu .btn { margin-top: .5rem; width: 100%; justify-content: center; }

/* ── FOOTER ── */
footer {
  background: #050505;
  border-top: 1px solid rgba(255,255,255,0.06);
  padding: 4rem 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 3rem;
  padding-bottom: 3rem;
}

.footer-brand p {
  color: var(--cinza-claro);
  font-size: .9rem;
  margin-top: 1rem;
  max-width: 280px;
  line-height: 1.7;
}

.footer-social {
  display: flex;
  gap: .75rem;
  margin-top: 1.25rem;
}

.footer-social a {
  width: 36px; height: 36px;
  border-radius: 50%;
  border: 1px solid rgba(255,255,255,0.15);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--cinza-claro);
  font-size: 1rem;
  transition: var(--transition);
}
.footer-social a:hover {
  border-color: var(--amarelo);
  color: var(--amarelo);
  background: rgba(245,197,24,0.08);
}

.footer-col h4 {
  font-size: .8rem;
  font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--amarelo);
  margin-bottom: 1.25rem;
}

.footer-col ul li {
  margin-bottom: .6rem;
}
.footer-col ul li a {
  color: var(--cinza-claro);
  font-size: .875rem;
  transition: var(--transition);
}
.footer-col ul li a:hover { color: var(--branco); }

.footer-contact li {
  display: flex;
  align-items: flex-start;
  gap: .75rem;
  color: var(--cinza-claro);
  font-size: .875rem;
  margin-bottom: .9rem;
}
.footer-contact li i {
  color: var(--amarelo);
  font-size: 1rem;
  margin-top: 2px;
  flex-shrink: 0;
}

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.06);
  padding: 1.25rem 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: .75rem;
}

.footer-bottom p {
  color: var(--cinza-claro);
  font-size: .8rem;
}

.footer-bottom span { color: var(--amarelo); }

/* ── WHATSAPP FLOAT ── */
.whatsapp-float {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 58px; height: 58px;
  background: #25D366;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  color: #fff;
  box-shadow: 0 4px 20px rgba(37,211,102,0.45);
  z-index: 999;
  transition: var(--transition);
  animation: pulse-wa 2.5s infinite;
}
.whatsapp-float:hover {
  transform: scale(1.1);
  box-shadow: 0 6px 30px rgba(37,211,102,0.65);
}

@keyframes pulse-wa {
  0%, 100% { box-shadow: 0 0 0 0 rgba(37,211,102,0.45); }
  50%       { box-shadow: 0 0 0 12px rgba(37,211,102,0); }
}

/* ── PÁGINA INTERNA — top padding ── */
.page-top { padding-top: 90px; }

/* ── HERO INTERNO ── */
.page-hero {
  background: linear-gradient(135deg, var(--cinza-escuro) 0%, var(--preto) 100%);
  padding: 5rem 0 4rem;
  position: relative;
  overflow: hidden;
}
.page-hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -10%;
  width: 500px; height: 500px;
  background: radial-gradient(circle, rgba(245,197,24,0.08) 0%, transparent 70%);
  pointer-events: none;
}
.page-hero .breadcrumb {
  font-size: .8rem;
  color: var(--cinza-claro);
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: .5rem;
}
.page-hero .breadcrumb a { color: var(--amarelo); }
.page-hero .breadcrumb i { font-size: .6rem; }

/* ── GRID UTILITIES ── */
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 2rem; }
.grid-3 { display: grid; grid-template-columns: repeat(3,1fr); gap: 2rem; }
.grid-4 { display: grid; grid-template-columns: repeat(4,1fr); gap: 2rem; }

/* ── CARD BASE ── */
.card-dark {
  background: var(--preto-card);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: var(--radius-lg);
  padding: 2rem;
  transition: var(--transition);
}
.card-dark:hover {
  border-color: var(--borda);
  transform: translateY(-4px);
  box-shadow: var(--sombra-hover);
}

/* ── SEÇÃO GENÉRICA ── */
.section { padding: 5rem 0; }
.section-alt { background: var(--cinza-escuro); }
.section-center { text-align: center; }
.section-center .section-subtitle { margin: .75rem auto 0; }

/* ── DIVIDER ── */
.divider {
  width: 60px; height: 4px;
  background: var(--amarelo);
  border-radius: 2px;
  margin: 1rem 0;
}
.divider-center { margin: 1rem auto; }

/* ── RESPONSIVE ── */
@media (max-width: 1024px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .grid-4 { grid-template-columns: repeat(2,1fr); }
}

@media (max-width: 768px) {
  .nav-links, .nav-cta { display: none; }
  .hamburger { display: flex; }
  .mobile-menu.open { display: flex; }
  .footer-grid { grid-template-columns: 1fr; gap: 2rem; }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; text-align: center; }
}