/* =====================================================
   FAS Brasil — Header / Navigation Component
   ===================================================== */

/* ── Header ───────────────────────────────────────── */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-sticky);
  padding-block: var(--space-4);
  transition: all var(--transition-base);
}

.site-header::before {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(6, 56, 91, 0);
  backdrop-filter: blur(0px);
  -webkit-backdrop-filter: blur(0px);
  transition: all var(--transition-base);
  z-index: -1;
}

.site-header.scrolled::before {
  background: rgba(6, 56, 91, 0.95);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: 0 1px 0 rgba(255,255,255,0.06), var(--shadow-md);
}

.site-header.scrolled {
  padding-block: var(--space-3);
}

/* Variante para páginas com hero claro */
.site-header--light::before {
  background: rgba(255,255,255,0);
}

.site-header--light.scrolled::before {
  background: rgba(255,255,255,0.96);
}

.site-header--light .nav-logo-text,
.site-header--light .nav-link,
.site-header--light .nav-toggle {
  color: var(--color-blue);
}

.site-header--light.scrolled .nav-logo-text,
.site-header--light.scrolled .nav-link {
  color: var(--color-blue);
}

/* ── Nav Layout ───────────────────────────────────── */
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-8);
}

/* ── Logo ─────────────────────────────────────────── */
.nav-logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  flex-shrink: 0;
}

.nav-logo img {
  height: 44px;
  width: auto;
  transition: height var(--transition-base);
}

.site-header.scrolled .nav-logo img {
  height: 36px;
}

.nav-logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1;
  color: var(--color-white);
}

.nav-logo-text strong {
  font-size: var(--text-lg);
  font-weight: var(--weight-extra);
  letter-spacing: -0.02em;
}

.nav-logo-text span {
  font-size: var(--text-xs);
  font-weight: var(--weight-medium);
  letter-spacing: var(--tracking-wide);
  opacity: 0.7;
  text-transform: uppercase;
}

/* ── Nav Links ────────────────────────────────────── */
.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  list-style: none;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  color: rgba(255,255,255,0.85);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.nav-link:hover,
.nav-link.active {
  color: var(--color-white);
  background: rgba(255,255,255,0.1);
}

.nav-link .nav-arrow {
  width: 14px;
  height: 14px;
  opacity: 0.6;
  transition: transform var(--transition-fast);
}

/* ── Dropdown ─────────────────────────────────────── */
.nav-item {
  position: relative;
}

.nav-item:hover .nav-dropdown,
.nav-item:focus-within .nav-dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.nav-item:hover .nav-arrow {
  transform: rotate(180deg);
  opacity: 1;
}

.nav-dropdown {
  position: absolute;
  top: calc(100% + var(--space-2));
  left: 50%;
  transform: translateX(-50%) translateY(-8px);
  min-width: 220px;
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  border: 1px solid var(--color-border);
  padding: var(--space-2);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-base);
  z-index: var(--z-dropdown);
}

[data-theme="dark"] .nav-dropdown {
  background: var(--color-dark-surface);
  border-color: var(--color-dark-border);
}

.nav-dropdown a {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  font-size: var(--text-sm);
  color: var(--color-text);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.nav-dropdown a:hover {
  background: var(--color-bg);
  color: var(--color-blue);
}

[data-theme="dark"] .nav-dropdown a {
  color: var(--color-dark-text);
}

[data-theme="dark"] .nav-dropdown a:hover {
  background: rgba(255,255,255,0.06);
  color: var(--color-green);
}

.nav-dropdown .dropdown-icon {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  background: var(--color-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-size: 18px;
}

.nav-dropdown .dropdown-label strong {
  display: block;
  font-weight: var(--weight-semi);
  font-size: var(--text-sm);
}

.nav-dropdown .dropdown-label span {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

/* ── Nav Actions ──────────────────────────────────── */
.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.nav-theme-toggle {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  border: 1px solid rgba(255,255,255,0.2);
  color: var(--color-white);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
  cursor: pointer;
  background: rgba(255,255,255,0.05);
  font-size: 16px;
}

.nav-theme-toggle:hover {
  background: rgba(255,255,255,0.15);
  border-color: rgba(255,255,255,0.4);
}

/* ── Mobile Toggle ────────────────────────────────── */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 36px;
  height: 36px;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--color-white);
  border-radius: var(--radius-md);
  transition: background var(--transition-fast);
  background: rgba(255,255,255,0.08);
}

.nav-toggle:hover {
  background: rgba(255,255,255,0.15);
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: currentColor;
  border-radius: var(--radius-full);
  transition: all var(--transition-base);
  transform-origin: center;
}

.nav-toggle.open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle.open span:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}

.nav-toggle.open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ── Mobile Menu: oculto em desktop ──────────────── */
.nav-menu {
  display: none;
}

@media (max-width: 1024px) {
  .nav-toggle {
    display: flex;
  }

  .nav-links {
    display: none;
  }

  .nav-menu {
    position: fixed;
    top: 0;
    right: -100%;
    width: min(380px, 90vw);
    height: 100dvh;
    background: var(--color-blue);
    padding: var(--space-20) var(--space-8) var(--space-8);
    flex-direction: column;
    gap: var(--space-8);
    transition: right var(--transition-slow) cubic-bezier(0.32, 0, 0.67, 0);
    overflow-y: auto;
    z-index: var(--z-modal);
    box-shadow: -8px 0 48px rgba(0,0,0,0.3);
  }

  .nav-menu .nav-links {
    display: flex;
  }

  .nav-menu.open {
    right: 0;
    transition-timing-function: cubic-bezier(0.33, 1, 0.68, 1);
  }

  .nav-menu-overlay {
    display: block;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.5);
    backdrop-filter: blur(4px);
    z-index: calc(var(--z-modal) - 1);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
  }

  .nav-menu-overlay.open {
    opacity: 1;
    visibility: visible;
  }

  .nav-menu .nav-links {
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    width: 100%;
  }

  .nav-menu .nav-links > li {
    width: 100%;
  }

  .nav-menu .nav-link {
    width: 100%;
    padding: var(--space-4);
    font-size: var(--text-base);
    border-radius: var(--radius-md);
    border-bottom: 1px solid rgba(255,255,255,0.06);
  }

  .nav-dropdown {
    position: static;
    transform: none;
    opacity: 1;
    visibility: visible;
    box-shadow: none;
    border: none;
    background: rgba(255,255,255,0.05);
    display: none;
    border-radius: var(--radius-md);
    margin-top: var(--space-1);
  }

  .nav-dropdown a {
    color: rgba(255,255,255,0.8);
    padding: var(--space-3);
  }

  .nav-dropdown a:hover {
    background: rgba(255,255,255,0.08);
    color: var(--color-white);
  }

  .nav-item.open .nav-dropdown {
    display: block;
  }

  .nav-actions .btn {
    width: 100%;
    justify-content: center;
  }
}

/* ── Footer ───────────────────────────────────────── */
.site-footer {
  background: var(--color-dark-bg);
  color: var(--color-dark-text);
  padding-top: var(--space-20);
}

.footer-top {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-12);
  padding-bottom: var(--space-16);
  border-bottom: 1px solid var(--color-dark-border);
}

.footer-brand .footer-logo img {
  height: 48px;
  margin-bottom: var(--space-5);
}

.footer-tagline {
  font-size: var(--text-sm);
  color: rgba(255,255,255,0.55);
  line-height: var(--leading-loose);
  max-width: 32ch;
  margin-bottom: var(--space-6);
}

.footer-social {
  display: flex;
  gap: var(--space-3);
}

.footer-social a {
  width: 38px;
  height: 38px;
  border-radius: var(--radius-full);
  border: 1px solid rgba(255,255,255,0.12);
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255,255,255,0.6);
  font-size: 16px;
  transition: all var(--transition-fast);
}

.footer-social a:hover {
  border-color: var(--color-green);
  color: var(--color-green);
  background: rgba(17, 127, 96, 0.1);
}

.footer-col h4 {
  font-size: var(--text-sm);
  font-weight: var(--weight-semi);
  color: var(--color-white);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  margin-bottom: var(--space-5);
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.footer-links a {
  font-size: var(--text-sm);
  color: rgba(255,255,255,0.55);
  transition: color var(--transition-fast);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

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

.footer-contact-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
  font-size: var(--text-sm);
  color: rgba(255,255,255,0.55);
}

.footer-contact-item svg {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
  margin-top: 2px;
  color: var(--color-green);
}

.footer-bottom {
  padding-block: var(--space-6);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-4);
}

.footer-copyright {
  font-size: var(--text-xs);
  color: rgba(255,255,255,0.35);
}

.footer-bottom-links {
  display: flex;
  gap: var(--space-5);
}

.footer-bottom-links a {
  font-size: var(--text-xs);
  color: rgba(255,255,255,0.35);
  transition: color var(--transition-fast);
}

.footer-bottom-links a:hover {
  color: var(--color-green);
}

@media (max-width: 1024px) {
  .footer-top {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-10);
  }

  .footer-brand {
    grid-column: 1 / -1;
  }
}

@media (max-width: 640px) {
  .footer-top {
    grid-template-columns: 1fr;
  }

  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
}

/* ── WhatsApp Float Button ────────────────────────── */
.whatsapp-float {
  position: fixed;
  bottom: var(--space-8);
  right: var(--space-8);
  z-index: var(--z-float);
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: var(--space-3);
}

.whatsapp-float__btn {
  width: 60px;
  height: 60px;
  border-radius: var(--radius-full);
  background: #25D366;
  color: var(--color-white);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 8px 32px rgba(37, 211, 102, 0.45);
  transition: all var(--transition-spring);
  cursor: pointer;
  text-decoration: none;
  position: relative;
}

.whatsapp-float__btn:hover {
  transform: scale(1.1) translateY(-2px);
  box-shadow: 0 12px 40px rgba(37, 211, 102, 0.55);
}

.whatsapp-float__btn svg {
  width: 30px;
  height: 30px;
}

.whatsapp-float__btn::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: var(--radius-full);
  background: #25D366;
  animation: waPulse 2.5s ease-in-out infinite;
  z-index: -1;
}

@keyframes waPulse {
  0%   { transform: scale(1); opacity: 0.6; }
  70%  { transform: scale(1.5); opacity: 0; }
  100% { transform: scale(1.5); opacity: 0; }
}

.whatsapp-float__tooltip {
  background: var(--color-white);
  color: var(--color-text);
  font-size: var(--text-xs);
  font-weight: var(--weight-semi);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-full);
  box-shadow: var(--shadow-lg);
  white-space: nowrap;
  opacity: 0;
  transform: translateX(8px);
  pointer-events: none;
  transition: all var(--transition-base);
}

.whatsapp-float:hover .whatsapp-float__tooltip {
  opacity: 1;
  transform: translateX(0);
}

@media (max-width: 640px) {
  .whatsapp-float {
    bottom: var(--space-5);
    right: var(--space-5);
  }

  .whatsapp-float__btn {
    width: 52px;
    height: 52px;
  }
}