html, body {
  margin: 0;
  padding: 0;
  height: 100%;
  width: 100%;
}

body {
  /* This pushes the actual content (text) down so it isn't hidden by the navbar */
  padding-top: var(--navbar-height);
}

.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--navbar-height);
  z-index: 1000;
  background-color: var(--background2);

  /* Crucial: Allows the mobile menu to display below the container */
  overflow: visible;
}

/* Gradient from bottom of navbar */
.navbar::after {
  content: "";
  position: absolute;
  top: 100%; /* Starts exactly at the bottom of the navbar */
  left: 0;
  width: 100%;
  height: 10px;
  background: linear-gradient(
    to bottom,
    var(--background2) 0%,
    transparent 100%
  );
  pointer-events: none; /* Lets users click content underneath the fade */
}

.nav-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
  color: var(--text-color);
  position: relative;
}

/* Brand styling */
.nav-brand {
  margin: 0;
  font-size: 1.5rem;
  font-weight: bold;
  line-height: 1;
}

/* Wrapper for the menu items (desktop default) */
.nav-menu-wrapper {
  display: block;
}

/* Menu links styling */
.nav-menu {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-link-item {
  text-decoration: none;
  font-weight: 600;
  transition: opacity 0.2s ease;
}

.nav-content a:link,
.nav-content a:visited,
.nav-content a:hover,
.nav-content a:active,
.hamburger {
  color: var(--accent1);
}

.nav-link-item:hover {
  opacity: 0.7;
}

/* Theme toggle button reset */
.theme-btn {
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.25rem;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent1);
}

/* Hamburger button (only at small width) */
.hamburger {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  flex-direction: column;
  gap: 5px;
  padding: 5px;
  z-index: 1001;
}

.hamburger .bar {
  display: block;
  width: 25px;
  height: 3px;
  background-color: var(--accent1);
  border-radius: 3px;
  transition: all 0.3s ease;
}

/* Mobile styling */
@media (max-width: 768px) {
  .hamburger {
    display: flex;
  }

  /* 
     The sliding drawer menu.
     We set max-height and padding to 0 by default to fix the 
     "ghost height" issue when the menu is closed.
  */
  .nav-menu-wrapper {
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    background-color: var(--background2);

    max-height: 0;
    padding: 0;
    overflow: hidden;

    transition: max-height 0.3s ease-in-out, padding 0.3s ease-in-out;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  }

  /* When the menu is toggled open via JS */
  .nav-menu-wrapper.active {
    max-height: 400px; /* Large enough to fit content */
    padding: 1rem 0; /* Only add padding when open */
    border-top: 1px solid rgba(255, 255, 255, 0.1);
  }

  .nav-menu {
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
    width: 100%;
  }

  /* Hamburger Animation */
  .hamburger[aria-expanded="true"] .bar:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
  }
  .hamburger[aria-expanded="true"] .bar:nth-child(2) {
    opacity: 0;
  }
  .hamburger[aria-expanded="true"] .bar:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
  }
}