:root {
  --header-band-height: 28px;
  --header-knot-width: 740px;
  --header-knot-overlap: 0px;

  
  --header-height: 5.5rem;

  
  --dropdown-bg: rgba(10, 10, 10, 0.96);
  --dropdown-border: rgba(220, 38, 38, 0.18);
  --dropdown-shadow: 0 18px 40px rgba(0, 0, 0, 0.55);
  --dropdown-radius: 14px;

  
  --logo-height: 64px;

  
  --nav-links-offset-base: clamp(3rem, 6vw, 7rem);

  
  --nav-links-offset-adjust: -10px;

  
  --nav-links-offset: calc(
    var(--nav-links-offset-base) + var(--nav-links-offset-adjust)
  );

  
  --band-bleed: 2px;
  --band-bottom-offset: -1px;
  --knot-seam-overlap: 2px;
}



.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;

  background: rgba(10, 10, 10, 0.8);
  backdrop-filter: blur(20px);

  
  padding: 0.75rem 0 calc(0.75rem + var(--header-band-height));
  overflow: visible;

  transition: all var(--transition-normal);
  animation: headerSlideDown 0.5s ease forwards;
}



.header::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;

  bottom: var(--band-bottom-offset);
  height: calc(var(--header-band-height) + var(--band-bleed));

  background-image: url("../images/faixa-continua.webp");
  background-repeat: repeat-x;
  background-position: left center;
  background-size: auto 100%;

  pointer-events: none;
  z-index: 1002;

  filter: drop-shadow(0 4px 12px rgba(0, 0, 0, 0.55)) saturate(1.2)
    contrast(1.15);
}



.header::before {
  content: "";
  position: absolute;

  right: calc(-1 * var(--knot-seam-overlap));

  bottom: var(--band-bottom-offset);
  height: calc(var(--header-band-height) + var(--band-bleed));

  width: calc(var(--header-knot-width) + var(--knot-seam-overlap));

  background-image: url("../images/faixa-com-no.webp");
  background-repeat: no-repeat;
  background-position: right bottom;
  background-size: 100% 100%;

  transform: translateX(var(--header-knot-overlap));

  pointer-events: none;
  z-index: 1003;

  filter: drop-shadow(0 4px 16px rgba(0, 0, 0, 0.65)) saturate(1.25)
    contrast(1.2);
}



.header.scrolled {
  background: rgba(10, 10, 10, 0.95);
  backdrop-filter: blur(10px);

  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1),
    0 2px 4px -1px rgba(0, 0, 0, 0.06),
    0 0 0 1px rgba(220, 38, 38, 0.18);
}



.header-content {
  display: flex;
  align-items: center;
  justify-content: space-between;

  height: var(--header-height);
  max-width: 1200px;
  margin: 0 auto;

  padding: 0 1rem;
  position: relative;
}


@media (min-width: 1280px) {
  .header-content {
    padding-right: calc(1rem + (var(--header-knot-width) * 0.08));
  }
}



.logo {
  display: inline-block;
  width: fit-content;
  height: fit-content;

  line-height: 0;
  padding: 0;
  margin: 0;
  flex: 0 0 auto;

  position: relative;
  overflow: hidden;
  border-radius: 0;
  isolation: isolate;

  text-decoration: none;
  z-index: 1001;
}

.logo::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: 0;

  background: radial-gradient(
    120% 120% at 20% 0%,
    rgba(255, 255, 255, 0.35),
    transparent 60%
  );
  opacity: 0.35;

  pointer-events: none;
  z-index: 2;
}

.logo::after {
  content: "";
  position: absolute;
  top: -50%;
  left: -60%;
  width: 55%;
  height: 200%;
  border-radius: 0;

  background: linear-gradient(
    120deg,
    transparent 0%,
    rgba(255, 255, 255, 0.55) 45%,
    rgba(255, 255, 255, 0.15) 60%,
    transparent 100%
  );
  transform: rotate(12deg);
  opacity: 0;

  pointer-events: none;
  z-index: 3;
}

.logo-img {
  display: block;
  height: var(--logo-height);
  width: auto;
  max-width: 100%;

  object-fit: contain;
  border-radius: 0;

  position: relative;
  z-index: 1;

  filter: drop-shadow(0 4px 10px rgba(0, 0, 0, 0.6));
  transition: transform var(--transition-normal), filter var(--transition-normal);
}

.logo:hover .logo-img {
  transform: scale(1.03);
  filter: drop-shadow(0 6px 16px rgba(220, 38, 38, 0.45));
}

.logo:hover::after,
.logo:focus-visible::after {
  opacity: 1;
  animation: logoSweep 0.85s ease-out forwards;
}

.logo:focus-visible {
  outline: 2px solid rgba(220, 38, 38, 0.75);
  outline-offset: 4px;
}



.nav-desktop {
  display: none;
  align-items: center;
  flex: 1;

  justify-content: flex-start;

  position: relative;
  min-width: 0;
}

@media (min-width: 1280px) {
  .nav-desktop {
    display: flex;
  }
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 2.25rem;
  min-width: 0;

  margin-left: var(--nav-links-offset);
}


.nav-cta {
  position: absolute;
  right: calc(var(--section-padding-x) - (1rem + (var(--header-knot-width) * 0.08)));
  top: 50%;
  transform: translateY(-50%);
}


.header .nav-cta .btn-gold,
.header .nav-cta .btn-gold:visited {
  color: rgba(255, 255, 255, 0.95);
}

.header .nav-cta .btn-gold:hover,
.header .nav-cta .btn-gold:focus-visible {
  color: #ffffff;
}



.nav-link {
  font-family: var(--font-body);
  font-size: 0.875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;

  color: var(--color-links-header);
  text-decoration: none;
  position: relative;

  transition: color var(--transition-fast);
  white-space: nowrap;
}

.nav-link::after {
  content: "";
  position: absolute;
  bottom: -4px;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 2px;

  background: linear-gradient(
    90deg,
    var(--color-crimson-light),
    var(--color-crimson)
  );

  transition: width var(--transition-normal);
}

.nav-link:hover,
.nav-link.active {
  color: var(--color-crimson);
}

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



.nav-dropdown {
  position: relative;
  display: inline-flex;
  align-items: center;
}

.nav-dropdown::after {
  content: "";
  position: absolute;
  left: -14px;
  right: -14px;
  top: 100%;
  height: 24px;
  background: transparent;
}

.nav-dropdown-toggle {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
}

.nav-caret {
  font-size: 0.9em;
  opacity: 0.85;
  transform: translateY(-1px);
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}

.nav-dropdown-menu {
  position: absolute;
  top: calc(100% + 8px);

  left: 50%;
  transform: translateX(-50%) translateY(6px);
  min-width: 220px;

  background: var(--dropdown-bg);
  border: 1px solid var(--dropdown-border);
  border-radius: var(--dropdown-radius);
  box-shadow: var(--dropdown-shadow);
  backdrop-filter: blur(18px);

  padding: 0.5rem;
  z-index: 1005;

  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 160ms ease, transform 160ms ease, visibility 160ms ease;
}

.nav-dropdown-item {
  display: block;
  padding: 0.75rem 0.85rem;
  border-radius: 10px;

  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 700;
  text-decoration: none;

  color: rgba(255, 255, 255, 0.72);
  transition: background-color var(--transition-fast),
    color var(--transition-fast), transform var(--transition-fast);
}

.nav-dropdown-item:hover,
.nav-dropdown-item:focus-visible {
  background: rgba(220, 38, 38, 0.14);
  color: var(--color-crimson);
  outline: none;
  transform: translateX(2px);
}

.nav-dropdown:hover .nav-dropdown-menu,
.nav-dropdown:focus-within .nav-dropdown-menu {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateX(-50%) translateY(0);
}

.nav-dropdown:hover .nav-caret,
.nav-dropdown:focus-within .nav-caret {
  opacity: 1;
  transform: translateY(-1px) rotate(180deg);
}

.nav-dropdown-menu::before {
  content: "";
  position: absolute;
  top: -8px;
  left: 50%;
  transform: translateX(-50%);

  width: 14px;
  height: 14px;

  background: var(--dropdown-bg);
  border-left: 1px solid var(--dropdown-border);
  border-top: 1px solid var(--dropdown-border);
  rotate: 45deg;
}



.menu-toggle {
  display: flex;
  align-items: center;
  justify-content: center;

  width: 3rem;
  height: 3rem;

  background: transparent;
  border: 1px solid rgba(220, 38, 38, 0.28);
  border-radius: var(--radius-sm);

  color: var(--color-links-header);
  cursor: pointer;

  transition: all var(--transition-fast);
  z-index: 1001;
}

.menu-toggle:hover {
  color: var(--color-crimson);
  border-color: rgba(220, 38, 38, 0.65);
  transform: scale(1.05);
}


@media (min-width: 1280px) {
  .menu-toggle {
    display: none;
  }
}



.mobile-menu {
  position: fixed;
  top: calc(var(--header-height) + var(--header-band-height) + 1.5rem);
  left: 0;
  right: 0;

  background: rgba(10, 10, 10, 0.98);
  backdrop-filter: blur(20px);

  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;

  z-index: 999;
}

.mobile-menu[hidden] {
  display: none;
}

.mobile-menu.active {
  max-height: 520px;
}

.mobile-nav {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  padding: 1.5rem;
}

.mobile-nav-link {
  font-size: 1.125rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;

  color: rgba(255, 255, 255, 0.72);
  text-decoration: none;
  padding: 1rem 0;

  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  transition: all var(--transition-fast);
}

.mobile-nav-link:hover,
.mobile-nav-link.active {
  color: var(--color-crimson);
  padding-left: 0.5rem;
}

.mobile-subnav {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;

  margin: -0.25rem 0 0.5rem;
  padding: 0.25rem 0 0.75rem 0.75rem;

  border-left: 1px solid rgba(220, 38, 38, 0.25);
}

.mobile-subnav-link {
  font-size: 1rem;
  letter-spacing: 0.3px;
  text-transform: none;
  padding: 0.65rem 0;

  border-bottom: none;
  color: rgba(255, 255, 255, 0.72);
}

.mobile-subnav-link:hover {
  color: var(--color-crimson);
  padding-left: 0.35rem;
}

.mobile-cta {
  margin-top: 0.75rem;
}



@media (max-width: 1279px) {
  :root {
    --header-knot-width: clamp(160px, 26vw, 320px);
    --logo-height: 56px;
    --header-height: 5.1rem;

    
    --nav-links-offset-base: 0rem;
    --nav-links-offset-adjust: 0px;
    --nav-links-offset: 0px;
  }

  .header-content {
    padding: 0 0.9rem;
  }
}



@media (max-width: 640px) {
  :root {
    --header-band-height: 26px;
    --header-knot-width: 160px;
    --header-knot-overlap: 0px;

    --header-height: 4.75rem;
    --logo-height: 44px;

    --nav-links-offset-base: 0rem;
    --nav-links-offset-adjust: 0px;
    --nav-links-offset: 0px;
  }

  .header-content {
    height: var(--header-height);
    padding: 0 0.75rem;
  }

  .menu-toggle {
    width: 2.5rem;
    height: 2.5rem;
  }

  .mobile-nav {
    padding: 1rem;
  }

  .mobile-nav-link {
    font-size: 1rem;
    padding: 0.875rem 0;
  }

  .mobile-subnav {
    padding-left: 0.65rem;
  }

  .mobile-subnav-link {
    font-size: 0.95rem;
    padding: 0.6rem 0;
  }
}



@keyframes headerSlideDown {
  from {
    transform: translateY(-100%);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

@keyframes logoSweep {
  from {
    left: -60%;
  }
  to {
    left: 120%;
  }
}