/* ========================================
   VK Engenharia - Tema Visual Elegante
   Identidade: Preto profundo + Prata + Azul
   Inspirado em sites profissionais de engenharia
   ======================================== */

:root {
  --bg-primary: #0a0a0b;
  --bg-secondary: #111113;
  --bg-card: #16161a;
  --bg-card-hover: #1e1e22;
  --text-primary: #f0f0f2;
  --text-secondary: #a8a8b0;
  --text-muted: #6e6e78;
  --accent: #2563eb;
  --accent-hover: #1d4ed8;
  --accent-soft: rgba(37, 99, 235, 0.12);
  --silver: #c8c8ce;
  --border: #2a2a30;
  --success: #22c55e;
  --radius: 14px;
  --radius-sm: 8px;
  --shadow: 0 8px 32px rgba(0, 0, 0, 0.45);
  --transition: 0.3s ease;
  --font-heading: 'Montserrat', system-ui, sans-serif;
  --font-body: 'Open Sans', system-ui, sans-serif;
  --header-height: 78px;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-height);
}

body {
  font-family: var(--font-body);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.65;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; transition: color var(--transition); }
ul { list-style: none; }

.container {
  width: 100%;
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Typography */
.section-title {
  font-family: var(--font-heading);
  font-size: clamp(1.8rem, 4vw, 2.4rem);
  font-weight: 700;
  letter-spacing: -0.025em;
  color: var(--text-primary);
  margin-bottom: 14px;
  line-height: 1.2;
}

.section-tag {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--accent);
  margin-bottom: 14px;
}

.section-desc {
  color: var(--text-secondary);
  font-size: 1.08rem;
  max-width: 580px;
  margin: 0 auto;
  line-height: 1.7;
}

.section-header {
  text-align: center;
  margin-bottom: 56px;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 0.92rem;
  padding: 13px 26px;
  border-radius: var(--radius-sm);
  border: none;
  cursor: pointer;
  transition: all var(--transition);
}

.btn-primary {
  background: var(--accent);
  color: #fff;
}
.btn-primary:hover {
  background: var(--accent-hover);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(37, 99, 235, 0.35);
}

.btn-outline {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border);
}
.btn-outline:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.btn-lg { padding: 15px 30px; font-size: 1rem; }
.btn-block { width: 100%; }

/* ========== HEADER ========== */
.header {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--header-height);
  background: rgba(10, 10, 11, 0.9);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  z-index: 1000;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.logo-img { height: 40px; width: auto; }

.nav-list { display: flex; gap: 30px; }

.nav-link {
  font-family: var(--font-heading);
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--text-secondary);
  position: relative;
}
.nav-link:hover, .nav-link.active { color: var(--text-primary); }
.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: -5px; left: 0; right: 0;
  height: 2px;
  background: var(--accent);
  border-radius: 1px;
}

.header-cta { display: none; }

.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}
.menu-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-primary);
}

/* ========== HERO ========== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: calc(var(--header-height) + 40px) 0 80px;
  background: var(--bg-primary);
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  opacity: 0.28;
  filter: brightness(0.55) contrast(1.1);
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(10,10,11,0.3) 0%, rgba(10,10,11,0.85) 70%, var(--bg-primary) 100%);
}

.hero-content {
  position: relative;
  max-width: 720px;
  z-index: 2;
}

.hero-badge {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--accent-soft);
  padding: 7px 16px;
  border-radius: 100px;
  margin-bottom: 22px;
  border: 1px solid rgba(37,99,235,0.25);
}

.hero-title {
  font-family: var(--font-heading);
  font-size: clamp(2.3rem, 5.5vw, 3.5rem);
  font-weight: 800;
  line-height: 1.12;
  letter-spacing: -0.03em;
  margin-bottom: 20px;
}
.hero-title span { color: var(--accent); }

.hero-subtitle {
  font-size: 1.12rem;
  color: var(--text-secondary);
  max-width: 580px;
  margin-bottom: 36px;
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 52px;
}

.hero-trust {
  display: flex;
  flex-wrap: wrap;
  gap: 36px;
  padding-top: 28px;
  border-top: 1px solid var(--border);
}

.trust-item {
  display: flex;
  flex-direction: column;
  gap: 3px;
}
.trust-item strong {
  font-family: var(--font-heading);
  font-size: 0.95rem;
  color: var(--text-primary);
}
.trust-item span {
  font-size: 0.84rem;
  color: var(--text-muted);
}

/* ========== CREDIBILIDADE ========== */
.credibilidade {
  padding: 100px 0;
  background: var(--bg-secondary);
}

.cred-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 56px;
  align-items: center;
}

.cred-text p {
  color: var(--text-secondary);
  margin-bottom: 18px;
  font-size: 1.05rem;
}
.cred-text strong { color: var(--text-primary); }

.cred-image {
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  position: relative;
}
.cred-image img {
  width: 100%;
  height: 420px;
  object-fit: cover;
}
.cred-image::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(10,10,11,0.4), transparent 50%);
}

/* ========== SERVIÇOS (Visual Alternating) ========== */
.servicos {
  padding: 100px 0 60px;
}

.servico-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
  margin-bottom: 80px;
}

.servico-row.reverse {
  direction: rtl;
}
.servico-row.reverse > * {
  direction: ltr;
}

.servico-image {
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  position: relative;
  height: 380px;
}
.servico-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s ease;
}
.servico-row:hover .servico-image img {
  transform: scale(1.04);
}

.servico-content {
  padding: 10px 0;
}

.servico-content .section-tag {
  margin-bottom: 10px;
}

.servico-content h3 {
  font-family: var(--font-heading);
  font-size: 1.55rem;
  font-weight: 700;
  margin-bottom: 14px;
  letter-spacing: -0.02em;
}

.servico-content > p {
  color: var(--text-secondary);
  margin-bottom: 20px;
  font-size: 1.02rem;
  line-height: 1.7;
}

.servico-list {
  margin-bottom: 24px;
}
.servico-list li {
  position: relative;
  padding-left: 20px;
  color: var(--text-secondary);
  font-size: 0.96rem;
  margin-bottom: 8px;
}
.servico-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 9px;
  width: 7px;
  height: 7px;
  background: var(--accent);
  border-radius: 50%;
}

.servico-details {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-top: 8px;
}
.detail-item {
  padding: 16px 18px;
  background: var(--bg-card);
  border-radius: var(--radius-sm);
  border-left: 3px solid var(--accent);
}
.detail-item h4 {
  font-family: var(--font-heading);
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 5px;
}
.detail-item p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin: 0;
  line-height: 1.55;
}

/* ========== MVV ========== */
.sobre {
  padding: 90px 0;
  background: var(--bg-secondary);
}

.mvv-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.mvv-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px 28px;
  transition: border-color var(--transition), transform var(--transition);
}
.mvv-card:hover {
  border-color: rgba(37, 99, 235, 0.35);
  transform: translateY(-4px);
}

.mvv-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--accent-soft);
  color: var(--accent);
  border-radius: 12px;
  margin-bottom: 20px;
}

.mvv-card h3 {
  font-family: var(--font-heading);
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.mvv-card p {
  color: var(--text-secondary);
  font-size: 0.97rem;
  line-height: 1.65;
}

.valores-list {
  display: flex;
  flex-direction: column;
  gap: 11px;
}
.valores-list li {
  font-size: 0.94rem;
  color: var(--text-secondary);
}
.valores-list strong {
  color: var(--text-primary);
  display: block;
  margin-bottom: 2px;
}

/* ========== CONTATO ========== */
.contato {
  padding: 100px 0;
}

.contato-grid {
  display: grid;
  grid-template-columns: 1fr 1.35fr;
  gap: 40px;
  align-items: start;
}

.info-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  margin-bottom: 18px;
}

.info-card h3 {
  font-family: var(--font-heading);
  font-size: 1.35rem;
  font-weight: 700;
}
.info-role {
  color: var(--accent);
  font-size: 0.95rem;
  font-weight: 500;
  margin-bottom: 24px;
}

.info-item {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  margin-bottom: 18px;
  color: var(--text-secondary);
}
.info-item svg {
  flex-shrink: 0;
  margin-top: 2px;
  color: var(--accent);
}
.info-item a:hover { color: var(--accent); }

.whatsapp-tag {
  display: inline-block;
  font-size: 0.68rem;
  background: #25d366;
  color: #fff;
  padding: 2px 7px;
  border-radius: 4px;
  margin-left: 6px;
  vertical-align: middle;
}

.info-note {
  font-size: 0.9rem;
  color: var(--text-muted);
  padding: 0 6px;
}

.contato-form-wrapper {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 36px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.form-group { margin-bottom: 18px; }
.form-group label {
  display: block;
  font-size: 0.84rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 6px;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 13px 15px;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 0.95rem;
  transition: border-color var(--transition);
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--accent);
}
.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--text-muted);
}
.form-group select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23a0a0a8' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  cursor: pointer;
}
.form-group textarea {
  resize: vertical;
  min-height: 120px;
}

.form-note {
  font-size: 0.8rem;
  color: var(--text-muted);
  text-align: center;
  margin-top: 14px;
}

.form-success {
  text-align: center;
  padding: 48px 20px;
}
.success-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto 20px;
  background: rgba(34, 197, 94, 0.15);
  color: var(--success);
  font-size: 1.8rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
}
.form-success h3 {
  font-family: var(--font-heading);
  font-size: 1.4rem;
  margin-bottom: 8px;
}
.form-success p {
  color: var(--text-secondary);
  margin-bottom: 24px;
}

/* ========== FOOTER ========== */
.footer {
  background: #060607;
  border-top: 1px solid var(--border);
  padding: 56px 0 28px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}

.footer-logo { height: 34px; margin-bottom: 14px; }
.footer-brand p {
  color: var(--text-muted);
  font-size: 0.93rem;
  max-width: 280px;
}

.footer-links h4,
.footer-contact h4 {
  font-family: var(--font-heading);
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--text-secondary);
  margin-bottom: 16px;
}
.footer-links a,
.footer-contact a {
  color: var(--text-muted);
  font-size: 0.93rem;
  display: block;
  margin-bottom: 8px;
}
.footer-links a:hover,
.footer-contact a:hover { color: var(--accent); }

.footer-bottom {
  padding-top: 24px;
  border-top: 1px solid var(--border);
  text-align: center;
}
.footer-bottom p {
  font-size: 0.84rem;
  color: var(--text-muted);
  margin-bottom: 4px;
}
.footer-crea { font-size: 0.78rem !important; }

/* ========== RESPONSIVE ========== */
@media (max-width: 960px) {
  .cred-grid,
  .servico-row,
  .servico-row.reverse,
  .contato-grid,
  .mvv-grid,
  .footer-grid {
    grid-template-columns: 1fr;
    direction: ltr;
  }
  .servico-row { gap: 28px; margin-bottom: 60px; }
  .servico-image { height: 280px; }
  .cred-image img { height: 300px; }

  .header-cta { display: none; }
  .nav {
    position: fixed;
    top: var(--header-height);
    left: 0; right: 0;
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border);
    padding: 24px;
    transform: translateY(-120%);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
  }
  .nav.open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }
  .nav-list { flex-direction: column; gap: 16px; }
  .menu-toggle { display: flex; }
}

@media (max-width: 640px) {
  .form-row { grid-template-columns: 1fr; }
  .hero-actions { flex-direction: column; }
  .hero-actions .btn { width: 100%; }
  .hero-trust { flex-direction: column; gap: 14px; }
}