/* ========================================
   UNIFIED NAVIGATION STYLES
   ======================================== */

/* Theme Toggle - Fixed top right, HIGHEST z-index */
.theme-toggle {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 9999;
  background: var(--bg-alt);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 10px 16px;
  border-radius: 25px;
  cursor: pointer;
  font-size: 0.9rem;
  font-weight: 500;
  backdrop-filter: blur(10px);
  transition: all 0.3s;
  box-shadow: var(--shadow);
}
.theme-toggle:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0,0,0,0.12);
}

/* Menu Toggle - Fixed top left, HIGHEST z-index */
.menu-toggle {
  position: fixed;
  top: 20px;
  left: 20px;
  z-index: 9999;
  background: var(--bg-alt);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 10px 15px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 1.5rem;
  backdrop-filter: blur(10px);
  transition: all 0.3s;
  box-shadow: var(--shadow);
  display: none; /* Hidden on desktop */
}
.menu-toggle:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0,0,0,0.12);
}

/* Nav - Desktop: Sticky at top */
#main-nav {
  background: var(--bg-alt);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: var(--shadow);
  transition: transform 0.3s ease;
}

#main-nav .nav-container {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 2px;
  padding: 0;
  max-width: 900px;
  margin: 0 auto;
}

#main-nav a {
  color: var(--text);
  text-decoration: none;
  padding: 16px 20px;
  display: block;
  font-weight: 500;
  font-size: 0.95rem;
  transition: background 0.2s;
  border-bottom: 3px solid transparent;
}

#main-nav a:hover,
#main-nav a.active {
  background: var(--primary);
  color: white;
  border-bottom-color: var(--primary);
}

/* ========================================
   MOBILE STYLES (max-width: 768px)
   ======================================== */
@media (max-width: 768px) {
  /* Show menu toggle on mobile */
  .menu-toggle {
    display: block;
  }
  
  /* Nav: Fixed at top, slides down when active */
  #main-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    transform: translateY(-100%); /* Hidden by default */
    transition: transform 0.3s ease;
    max-height: 80vh;
    overflow-y: auto;
  }
  
  #main-nav.open {
    transform: translateY(0); /* Visible when open */
  }
  
  #main-nav .nav-container {
    flex-direction: column;
    gap: 0;
    background: var(--bg-alt);
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow);
  }
  
  #main-nav a {
    display: block;
    padding: 14px 16px;
    font-size: 0.9rem;
    border-bottom: 1px solid var(--border);
  }
  
  #main-nav a:last-of-type {
    border-bottom: none;
  }
  
  /* Add padding to body for fixed nav */
  body {
    padding-top: 60px;
  }
}