/* header principal (azul) + barra de abas (branca) */

.site-header {
  background: var(--b3-blue-primary);
  height: 80px;
  color: var(--b3-white);
}

.site-header .container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-pad);
  height: 100%;
  display: flex;
  align-items: center;
  gap: 32px;
}

/* logo B³ */
.logo {
  display: inline-flex;
  align-items: baseline;
  font-weight: 700;
  font-size: 32px;
  line-height: 1;
  color: var(--b3-white);
  letter-spacing: -1px;
}
.logo .bracket { font-weight: 700; opacity: 0.95; }
.logo .letter { padding: 0 2px; }
.logo .three { font-size: 18px; font-weight: 700; margin-left: 2px; vertical-align: super; }

/* menu */
.main-nav { flex: 1; }
.main-nav ul {
  display: flex;
  gap: 32px;
  justify-content: center;
  align-items: center;
}
.main-nav a {
  font-size: 15px;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  color: rgba(255, 255, 255, 0.92);
  transition: color 0.15s ease, opacity 0.15s ease;
}
.main-nav a .material-symbols-outlined {
  font-size: 16px;
  opacity: 0.7;
  transition: opacity 0.15s ease;
}
.main-nav a:hover { color: var(--b3-white); }
.main-nav a:hover .material-symbols-outlined { opacity: 1; }

/* dropdown placeholder */
.main-nav li { position: relative; }
.main-nav .dropdown {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 220px;
  background: var(--b3-white);
  color: var(--b3-text-primary);
  border-radius: 4px;
  box-shadow: 0 6px 20px rgba(0,0,0,0.12);
  padding: 12px 0;
  margin-top: 8px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-4px);
  transition: opacity 0.15s ease, transform 0.15s ease, visibility 0.15s;
  z-index: 50;
}
.main-nav li:hover > .dropdown,
.main-nav li:focus-within > .dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.main-nav .dropdown li { padding: 8px 16px; font-size: 14px; }

/* utilitários do header */
.header-tools {
  display: flex;
  align-items: center;
  gap: 16px;
}
.icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  color: var(--b3-white);
}
.icon-btn .material-symbols-outlined { font-size: 24px; }

.search-field {
  display: none;
  align-items: center;
}
.search-field.open { display: inline-flex; }
.search-field input {
  background: rgba(255,255,255,0.12);
  border: 1px solid rgba(255,255,255,0.25);
  border-radius: 4px;
  padding: 8px 12px;
  color: var(--b3-white);
  font: inherit;
  font-size: 14px;
  width: 220px;
  outline: none;
}
.search-field input::placeholder { color: rgba(255,255,255,0.6); }

.divider-v {
  width: 1px;
  height: 28px;
  background: rgba(255,255,255,0.2);
  margin: 0 4px;
}

.investor-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--b3-white);
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.investor-link .material-symbols-outlined { font-size: 22px; }

/* hambúrguer (mobile) */
.menu-toggle { display: none; }

/* barra de abas */
.tabs-bar {
  background: var(--b3-white);
  border-bottom: 1px solid var(--b3-gray-border);
  height: 60px;
}
.tabs-bar .container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-pad);
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}
.tabs {
  display: flex;
  gap: 60px;
  align-items: center;
  height: 100%;
}
.tabs button {
  position: relative;
  height: 100%;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  color: var(--b3-text-secondary);
  transition: color 0.15s ease;
  padding: 0 4px;
}
.tabs button:hover { color: var(--b3-text-primary); }
.tabs button.active { color: var(--b3-text-primary); }
.tabs button.active::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 8px;
  height: 3px;
  background: var(--b3-cyan-accent);
  border-radius: 2px;
}

.cta-quotes {
  position: absolute;
  right: var(--container-pad);
  top: 50%;
  transform: translateY(-50%);
  background: var(--b3-yellow-cta);
  color: var(--b3-text-primary);
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  padding: 12px 24px;
  border-radius: 24px;
  transition: background 0.15s ease;
}
.cta-quotes:hover { background: var(--b3-yellow-cta-hover); }

/* responsivo */
@media (max-width: 768px) {
  .site-header .container { gap: 12px; }
  .main-nav {
    display: none;
    position: absolute;
    top: 80px;
    left: 0;
    right: 0;
    background: var(--b3-blue-primary);
    padding: 16px 0;
    z-index: 40;
  }
  .main-nav.open { display: block; }
  .main-nav ul { flex-direction: column; gap: 0; }
  .main-nav ul li { width: 100%; }
  .main-nav a {
    padding: 12px 5%;
    width: 100%;
    justify-content: space-between;
  }
  .menu-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: var(--b3-white);
    width: 36px; height: 36px;
  }
  .menu-toggle .material-symbols-outlined { font-size: 28px; }
  .investor-link span:not(.material-symbols-outlined) { display: none; }

  .tabs-bar { height: auto; padding: 12px 0; }
  .tabs-bar .container { flex-direction: column; align-items: stretch; gap: 12px; }
  .tabs {
    overflow-x: auto;
    gap: 28px;
    padding: 0 var(--container-pad);
    height: 44px;
    scrollbar-width: none;
  }
  .tabs::-webkit-scrollbar { display: none; }
  .tabs button { white-space: nowrap; }
  .tabs button.active::after { bottom: 4px; }
  .cta-quotes {
    position: static;
    transform: none;
    align-self: center;
    margin-top: 4px;
  }
}