header {
  background-color: var(--section-bg);
  color: var(--section-text);
  padding: var(--spacing-md) var(--spacing-xl);
  border-bottom: 1px solid rgba(0, 0, 0, 0.1);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-container {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--spacing-xl);
}

.logo {
  font-family: var(--font-family-logo);
  font-size: var(--font-size-xl);
  font-weight: 700;
  text-decoration: none;
}

.logo img {
  height: 50px;
  width: auto;
  background-color: transparent;
  mix-blend-mode: multiply;
}

.btn-join-now {
  background-color: var(--section-text);
  color: var(--section-bg);
  padding: var(--spacing-sm) var(--spacing-lg);
  border: 2px solid var(--section-text);
  border-radius: 25px;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  transition: all 0.2s ease;
  font-size: var(--font-size-sm);
  display: inline-block;
  margin-left: auto;
}

.btn-join-now:hover {
  background-color: magenta;
  color: var(--section-text);
}

nav {
  flex: 1;
}

nav ul {
  display: flex;
  list-style: none;
  gap: var(--spacing-lg);
  margin: 0;
  justify-content: center;
}

nav a {
  color: var(--section-text);
  text-decoration: none;
  font-weight: 500;
  transition: opacity 0.2s ease;
}

nav a:hover {
  opacity: 0.7;
}

nav a.active {
  border-bottom: 2px solid #e91e8c;
  padding-bottom: 2px;
}

/* Hamburger toggle — injected by main.js, hidden on desktop */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 0;
  margin-left: auto;
  background: none;
  border: none;
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  width: 26px;
  height: 2px;
  background-color: var(--section-text);
  border-radius: 2px;
  transition: transform 0.25s ease, opacity 0.2s ease;
}

/* ── Mobile nav ── */
@media (max-width: 900px) {
  header {
    padding: var(--spacing-md) var(--spacing-lg);
  }

  .header-container {
    flex-wrap: wrap;
    gap: var(--spacing-md);
  }

  .logo {
    order: 1;
  }

  .nav-toggle {
    display: flex;
    order: 2;
  }

  /* Collapsible panel: nav links + the "My Resources" button */
  nav {
    order: 3;
    flex: 0 0 100%;
    display: none;
  }

  .header-container .btn-join-now {
    order: 4;
    flex: 0 0 100%;
    display: none;
    margin-left: 0;
    text-align: center;
  }

  header.nav-open nav,
  header.nav-open .header-container .btn-join-now {
    display: block;
  }

  nav ul {
    flex-direction: column;
    gap: 0;
    justify-content: flex-start;
  }

  nav li {
    margin: 0;
    border-top: 1px solid rgba(0, 0, 0, 0.08);
  }

  nav a {
    display: block;
    padding: var(--spacing-md) var(--spacing-xs);
  }

  nav a.active {
    border-bottom: none;
    padding-bottom: var(--spacing-md);
    color: #e91e8c;
  }

  /* Animate hamburger into an X when open */
  header.nav-open .nav-toggle span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
  }

  header.nav-open .nav-toggle span:nth-child(2) {
    opacity: 0;
  }

  header.nav-open .nav-toggle span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
  }
}