header {
  background-color: var(--color-bg);
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 9999;
  padding: 1.5rem 0;
  box-sizing: border-box;
  /* sombra clara e difusa para destacar no fundo preto */
  box-shadow: 0 2px 10px rgba(255, 255, 255, 0.05),
    0 2px 20px rgba(0, 0, 0, 0.6);
}

nav {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 90%;
  max-width: 1200px;
  margin: 0 auto;
  background-color: var(--color-bg-alt);
  padding: 0.5rem 2rem !important;
  box-sizing: border-box;
  border-radius: 50px;
  gap: 1rem;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.6),
    0 0 8px rgba(100, 100, 255, 0.1);
  flex-wrap: wrap;
}

.logo {
  background-color: var(--color-primary-dark);
  border-radius: 50%;
  padding: 0.3em 0.4em 0.3em 0.3em;
  margin-left: -0.4em;
  font-weight: 700;
  flex-shrink: 0;
  font-size: clamp(1.2rem, 2vw, 1.5rem);
}

.hamburger {
  background: none;
  border: none;
  margin-left: auto;
  font-size: clamp(1.5rem, 2vw, 2rem);
  color: var(--color-text);
  cursor: pointer;
  will-change: transform;
  transition: transform 0.3s ease;
}

.hamburger.active {
  transform: rotate(90deg);
  border: none;
  outline: none;
  box-shadow: none;
}

.nav-links {
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  align-items: flex-start;
  position: fixed;
  top: 0;
  right: -100%;
  height: 100vh;
  width: 240px;
  background-color: var(--color-bg-alt);
  padding: 2rem 1.5rem;
  box-shadow: -2px 0 12px rgba(0, 0, 0, 0.25);
  z-index: 100;
  gap: 1rem;
  border-radius: 0;
  transition: right 0.3s ease;
  
}

.nav-links.open {
  right: 0;
  background-color: var(--color-primary-dark);
}

.nav-links a {
  position: relative;
  z-index: 1;
  text-decoration: none;
  color: var(--color-text);
  padding: clamp(0.4rem, 0.8vw, 0.4rem) clamp(1rem, 2vw, 1.2rem);
  border-radius: 50px;
  transition: color 0.3s ease, background 0.3s ease;
  font-size: clamp(0.9rem, 1.2vw, 1rem);
  width: 100%;
}

.nav-links a:hover,
.nav-links a:focus {
  background-color: var(--color-primary);
  text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.5);
}

.nav-links a.active {
  background-color: var(--color-primary);
  color: #fff;
  text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.5);
}

@media (min-width: 768px) {
  .hamburger {
    display: none;
  }

  nav {
    max-width: 1200px;
    width: 90%;
    margin: 0 auto;
    padding: 0.8rem clamp(1rem, 2vw, 2rem);
    justify-content: center;
    flex-wrap: nowrap;
    overflow-x: auto;
  }

  .nav-links {
    display: flex !important;
    flex-direction: row;
    position: static;
    background: transparent;
    box-shadow: none;
    width: auto;
    padding: 0;
    gap: clamp(0.3rem, 0.8vw, 0.8rem);
    flex-wrap: nowrap;
    height: auto;
    right: auto;
    top: auto;
  }

  .logo {
    display: none;
  }
}

@media (min-width: 1024px) {
  .nav-links a:hover {
    background-color: var(--color-primary);
  }

  .nav-links a.active {
    background-color: var(--color-primary-dark);
    color: #fff;
    border: none;
  }
}