:root {
  --brand-green-600: #2b7a2e;
  --brand-green-500: #4caf50;
  --brand-green-100: #e9f4ea;
  --gray-700: #334155;
  --gray-200: #e5e7eb;
  --white: #ffffff;

  --font-sans: 'Libre Franklin', system-ui, sans-serif;

  --container-max: 1200px;
  --container-pad: 16px;
}

* { box-sizing: border-box; }
body { margin: 0; font-family: var(--font-sans); }
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }

.container {
  max-width: var(--container-max);
  padding: 0 var(--container-pad);
  margin: 0 auto;
}

.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,1px,1px); white-space: nowrap; border: 0;
}

/* HEADER */
.site-header { 
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: linear-gradient(rgba(255, 255, 255, 0.95), rgba(255, 255, 255, 0.95)), 
              url("../images/fundo-header.png") center/cover no-repeat;
  isolation: isolate;
   box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15); 
  /*overflow: hidden;*/
}
.site-header__bg {
  position: absolute; 
  inset: 0;
  background: url("../images/fundo-header.png") center/cover no-repeat;
  opacity: 0.2;
  z-index: -1;
}

.header__wrap {
  display: flex; align-items: center; justify-content: space-between;
  gap: 32px; 
  padding: 12px 0 !important;
}

.brand { display: inline-flex; align-items: center; gap: 12px; }
.brand__logo-tcu { height: 36px; }
.brand__logo-colab { height: 36px; }

/* NAV */
.primary-nav {
  display: block;
}

.menu {
  list-style: none; display: flex; gap: 8px; margin: 0; padding: 0;
}
.menu__item { position: relative; }
.menu__item + .menu__item { padding-left: 16px; }
.menu__item + .menu__item::before {
  content: ""; position: absolute; left: 8px; top: 50%; transform: translateY(-50%);
  width: 1px; height: 18px; background: var(--brand-green-500); opacity: .6;
}
.menu__link {
  display: inline-block; padding: 6px 10px; font-weight: 500;
  color: var(--brand-green-600); border-radius: 999px;
  font-size: 14px;
  transition: all 0.2s ease;
}
.menu__link:hover { 
  background: rgba(76, 175, 80, 0.1);
  text-decoration: none;
}
.menu__link.is-active { 
  background: var(--brand-green-100); 
  border: 1px solid var(--brand-green-500);
  font-weight: 600;
}

/* Submenu dropdown */
.menu__item--dropdown {
  position: relative;
}

.submenu {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 220px;
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: 8px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.1);
  list-style: none;
  margin: 0;
  padding: 8px 0;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: all 0.2s ease;
  z-index: 1000;
  margin-top: -5px;
  padding-top: 13px;
}

.menu__item--dropdown:hover .submenu,
.submenu:hover {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.submenu__item {
  margin: 0;
}

.submenu__link {
  display: block;
  padding: 10px 16px;
  color: var(--gray-700);
  font-size: 14px;
  font-weight: 500;
  transition: all 0.2s ease;
  text-decoration: none;
}

.submenu__link:hover {
  background: var(--brand-green-100);
  color: var(--brand-green-600);
}

/* Força a cor do texto do submenu para garantir visibilidade */
.submenu__item .submenu__link {
  color: #334155 !important;
  font-size: 14px !important;
}

.header__bottom-line { height: 4px; background: var(--brand-green-500); }

/* Menu Toggle */
.menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 40px;
  height: 40px;
  border: none;
  background: transparent;
  cursor: pointer;
  padding: 0;
}

.hamburger {
  position: relative;
  width: 24px;
  height: 2px;
  background: var(--brand-green-600);
  transition: transform 0.3s ease;
}

.hamburger::before,
.hamburger::after {
  content: '';
  position: absolute;
  width: 24px;
  height: 2px;
  background: var(--brand-green-600);
  transition: all 0.3s ease;
}

.hamburger::before {
  top: -8px;
}

.hamburger::after {
  top: 8px;
}

/* Desktop Styles */
@media (min-width: 993px) {
  .menu-toggle { 
    display: none !important; 
  }
  
  .primary-nav { 
    display: block !important; 
  }
  
  .menu { 
    display: flex !important;
    position: static !important;
    background: transparent !important;
    border: none !important;
    box-shadow: none !important;
    max-height: none !important;
    overflow: visible !important;
    width: auto !important;
    flex-direction: row !important;
    padding: 0 !important;
    opacity: 1 !important;
    visibility: visible !important;
  }
}

/* Mobile */
@media (max-width: 992px) {
  .menu-toggle { 
    display: inline-flex !important; 
  }
  
  .primary-nav { 
    position: relative;
  }

  .menu {
    position: absolute; 
    right: 0; 
    top: calc(100% + 8px);
    width: min(92vw, 360px);
    flex-direction: column; 
    align-items: stretch;
    padding: 8px; 
    background: var(--white);
    border: 1px solid var(--gray-200); 
    border-radius: 12px;
    box-shadow: 0 8px 24px rgba(0,0,0,.15), 0 4px 6px rgba(0,0,0,.1); /* Sombra mais forte */
    max-height: 0; 
    overflow: hidden; 
    transition: max-height .25s ease;
    opacity: 0;
    visibility: hidden;
    z-index: 99999 !important; /* Z-index muito alto com !important para garantir prioridade */
  }
  
  .menu.is-open { 
    max-height: 420px; 
    opacity: 1;
    visibility: visible;
  }

  .menu__item + .menu__item { 
    padding-left: 0; 
  }
  
  .menu__item + .menu__item::before { 
    display: none; 
  }
  
  .menu__link { 
    padding: 12px 10px; 
    border-radius: 8px; 
  }

  /* Submenu mobile */
  .submenu {
    position: static;
    opacity: 1;
    visibility: visible;
    transform: none;
    box-shadow: none;
    border: none;
    background: var(--brand-green-100);
    border-radius: 8px;
    margin-top: 4px;
    padding: 4px 0;
  }

  .submenu__link {
    padding: 8px 16px;
    font-size: 13px;
  }

  .menu-toggle[aria-expanded="true"] .hamburger { 
    transform: rotate(45deg); 
  }
  
  .menu-toggle[aria-expanded="true"] .hamburger::before { 
    transform: rotate(90deg); 
    top: 0;
  }
  
  .menu-toggle[aria-expanded="true"] .hamburger::after { 
    opacity: 0; 
  }
}