/* ============================================
   NAVBAR (navbar)
   BEM: Block Element Modifier
   ============================================ */

.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  transition: transform var(--transition-slow), background var(--transition-slow), box-shadow var(--transition-slow);
  background: transparent;
  transform: translateY(-100%);
}

.navbar--visible {
  transform: translateY(0);
}

/* Estado com scroll */
.navbar--scrolled {
  background: var(--overlay-background);
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow-card);
}

/* Wrapper da navbar */
.navbar__wrapper {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--navbar-height);
}

/* ===== LOGO (logo) ===== */
.logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  font-size: var(--text-size-xl);
  font-weight: var(--font-weight-semibold);
  font-family: var(--font-family-display);
  text-decoration: none;
  color: inherit;
}

.logo__image {
  border: 1px solid var(--color-white);
  box-shadow: var(--shadow-elevated);
  background-color: var(--color-white);
  width: 60px;
  height: 60px;
  object-fit: contain;
  transition: transform var(--transition-base);
  flex-shrink: 0;
  border-radius: 50%;
}

.logo__image:hover {
  transform: scale(1.1);
}

.logo__text {
  color: var(--color-blue-300);
}

.navbar--scrolled .logo__text {
  color: var(--color-blue-700);
}

.logo__text--highlight {
  background: var(--color-orange-700);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.navbar--scrolled .logo__image {
  filter: drop-shadow(0 2px 4px var(--overlay-darker));
}

/* ===== MENU (nav) ===== */
.nav-menu {
  display: flex;
  align-items: center;
  gap: var(--spacing-3rem);
}

/* ===== LINK (nav-link) ===== */
.nav-link {
  color: var(--color-white);
  font-weight: var(--font-weight-medium);
  position: relative;
  transition: color var(--transition-base);
  text-decoration: none;
}

.nav-link:focus-visible {
  outline: 2px solid var(--color-orange-700);
  outline-offset: 4px;
}

.navbar--scrolled .nav-link {
  color: var(--color-black);
}

.navbar--scrolled .nav-link:hover {
  color: var(--color-black);
}

/* Underline animation */
.nav-link::after {
  content: "";
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient-blue);
  transition: width var(--transition-base);
}

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

/* ===== MOBILE TOGGLE ===== */
.mobile-menu-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  color: var(--color-black);
  cursor: pointer;
  transition: color var(--transition-base);
}

.mobile-menu-toggle:focus-visible {
  outline: 2px solid var(--color-orange-700);
  outline-offset: 2px;
}

/* ============================================
   RESPONSIVIDADE - MOBILE
   ============================================ */
@media (max-width: 768px) {
  .mobile-menu-toggle {
    display: block;
  }

  .nav-menu {
    position: fixed;
    top: var(--navbar-height);
    left: 0;
    right: 0;
    background: var(--overlay-background);
    backdrop-filter: blur(10px);
    flex-direction: column;
    padding: var(--spacing-lg);
    gap: var(--spacing-md);
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-slow);
    box-shadow: var(--shadow-elevated);
  }

  .nav-menu--active {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

  .nav-link {
    color: var(--color-black);
    padding: var(--spacing-md) 0;
    min-height: 44px;
    display: flex;
    align-items: center;
    border-bottom: 1px solid var(--color-gray-200);
    width: 100%;
  }

  .nav-menu .btn {
    margin-top: var(--spacing-sm);
    min-height: 44px;
    width: 100%;
    justify-content: center;
  }
}