/* ==========================================================================
   ACURIA - Layout & Navigation Styles
   ========================================================================== */

/* Header & Barra Superior com Segmentação */
.site-header {
  position: sticky;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--header-height);
  background: rgba(10, 17, 30, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-slate-border);
  z-index: 100;
  transition: background-color var(--transition-fast), border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.site-header.scrolled {
  background: rgba(7, 13, 24, 0.97);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
  border-bottom-color: rgba(13, 148, 136, 0.25);
}

.header-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  gap: 24px;
}

/* Marca / Logotipo na barra de navegação */
.brand-link {
  display: flex;
  align-items: center;
  gap: 14px;
  color: var(--color-text-primary);
  text-decoration: none;
  flex-shrink: 0;
}

.brand-symbol {
  width: 34px;
  height: 34px;
  flex-shrink: 0;
  transition: transform var(--transition-fast);
}

.brand-link:hover .brand-symbol {
  transform: scale(1.05);
}

.brand-text {
  display: flex;
  flex-direction: column;
}

.brand-title {
  font-family: var(--font-brand);
  font-weight: 400;
  font-size: 1.375rem;
  letter-spacing: 0.22em;
  line-height: 1;
  color: var(--color-text-primary);
}

.brand-subtitle {
  font-family: var(--font-brand);
  font-size: 0.5625rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  white-space: nowrap;
  margin-top: 3px;
}

/* Segmentações de Navegação Superior */
.nav-segments {
  display: flex;
  align-items: center;
  gap: clamp(14px, 1.8vw, 28px);
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-item {
  position: relative;
}

.nav-link {
  display: inline-flex;
  align-items: center;
  font-family: var(--font-body);
  font-size: 0.875rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  color: var(--color-text-muted);
  padding: 10px 4px;
  white-space: nowrap; /* Não quebra texto */
  transition: color var(--transition-fast);
  position: relative;
}

.nav-link:hover {
  color: var(--color-text-primary);
}

/* Indicador de Segmento Ativo (Scrollspy) */
.nav-link.active {
  color: var(--color-text-primary);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--color-accent);
  transition: width var(--transition-smooth);
}

.nav-link.active::after {
  width: 100%;
}

/* Header Actions */
.header-actions {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-shrink: 0;
}

/* Menu Mobile Toggle */
.mobile-menu-btn {
  display: none;
  background: transparent;
  border: 1px solid var(--color-slate-border);
  color: var(--color-text-primary);
  width: 42px;
  height: 42px;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  padding: 0;
}

.mobile-menu-btn:hover {
  border-color: var(--color-accent);
  color: var(--color-accent-light);
}

.mobile-menu-icon {
  width: 20px;
  height: 14px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.mobile-menu-icon span {
  display: block;
  height: 2px;
  width: 100%;
  background-color: currentColor;
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}

.mobile-menu-btn.open .mobile-menu-icon span:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}

.mobile-menu-btn.open .mobile-menu-icon span:nth-child(2) {
  opacity: 0;
}

.mobile-menu-btn.open .mobile-menu-icon span:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

/* Menu Gaveta Mobile */
.mobile-drawer {
  display: none;
  position: fixed;
  top: var(--header-height);
  left: 0;
  width: 100%;
  height: calc(100vh - var(--header-height));
  background: rgba(7, 13, 24, 0.98);
  backdrop-filter: blur(16px);
  padding: 32px 24px;
  flex-direction: column;
  gap: 20px;
  z-index: 99;
  border-bottom: 1px solid var(--color-slate-border);
  transform: translateY(-100%);
  opacity: 0;
  pointer-events: none;
  transition: transform var(--transition-smooth), opacity var(--transition-smooth);
}

.mobile-drawer.open {
  transform: translateY(0);
  opacity: 1;
  pointer-events: auto;
}

.mobile-nav-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
  list-style: none;
  padding: 0;
  margin: 0;
}

.mobile-nav-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-family: var(--font-brand);
  font-size: 1.25rem;
  letter-spacing: 0.08em;
  color: var(--color-text-body);
  padding: 12px 0;
  border-bottom: 1px solid var(--color-slate-border);
}

.mobile-nav-link .mono-num {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--color-accent);
}

/* Seções Principais - Estrutura da Página Corrida */
.section-wrapper {
  position: relative;
  border-bottom: 1px solid var(--color-slate-border);
}

.section-alt {
  background-color: var(--color-bg-alt);
}

.section-header {
  margin-bottom: clamp(36px, 5vw, 64px);
}

.section-header-top {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 12px;
}

.section-title {
  font-size: clamp(1.75rem, 3.5vw, 2.75rem);
  font-weight: 400;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.section-subtitle {
  font-size: clamp(1rem, 1.5vw, 1.1875rem);
  color: var(--color-text-muted);
  max-width: 65ch;
  line-height: 1.65;
  margin-top: 8px;
}

/* Rodapé Institucional */
.site-footer {
  background: var(--color-bg-alt);
  border-top: 1px solid var(--color-slate-border);
  padding-top: clamp(60px, 8vw, 96px);
  padding-bottom: 40px;
  position: relative;
}

.footer-top-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: clamp(32px, 4vw, 56px);
  margin-bottom: 64px;
}

.footer-brand-col p {
  margin-top: 16px;
  font-size: 0.9375rem;
  max-width: 36ch;
}

.footer-heading {
  font-family: var(--font-brand);
  font-size: 1rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-text-primary);
  margin-bottom: 20px;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-links a {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  transition: color var(--transition-fast);
}

.footer-links a:hover {
  color: var(--color-accent-light);
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 20px;
  padding-top: 32px;
  border-top: 1px solid var(--color-slate-border);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-text-dim);
  letter-spacing: 0.08em;
}