:root {
  --nav-bg: rgba(15, 23, 36, 0.9);
  --nav-text: #e6eef8;
  --nav-accent: #00ffc8;
}

header.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 24px;
  background: var(--nav-bg) !important;
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  z-index: 99999;
  box-sizing: border-box;
  font-family: system-ui, -apple-system, sans-serif;
}

header.navbar .nav-brand {
  font-size: 22px;
  font-weight: 700;
  color: var(--nav-text);
  letter-spacing: 1px;
  flex-shrink: 0;
}

.menu-btn {
  display: none;
  font-size: 26px;
  background: none;
  border: 0;
  color: white;
  cursor: pointer;
  margin-left: auto;
}

nav#navMenu {
  margin-left: auto;
  display: block;
}

nav#navMenu ul {
  list-style: none;
  display: flex;
  gap: 24px;
  padding: 0;
  margin: 0;
  align-items: center;
}

nav#navMenu a {
  text-decoration: none;
  color: var(--nav-text);
  font-weight: 500;
  transition: all 0.3s ease;
  padding: 8px 12px;
  border-radius: 6px;
}

nav#navMenu a:hover {
  color: var(--nav-accent);
  background: rgba(255, 255, 255, 0.05);
}

/* Specific style for back button */
nav#navMenu a[onclick*="history.back"] {
  border: 1px solid rgba(255, 255, 255, 0.2);
  margin-right: 12px;
}

nav#navMenu a[onclick*="history.back"]:hover {
  border-color: var(--nav-accent);
  background: rgba(0, 255, 200, 0.1);
}

@media (max-width: 700px) {
  .menu-btn {
    display: block;
  }

  nav#navMenu {
    position: absolute;
    top: 100%;
    right: 24px;
    background: rgba(15, 23, 36, 0.96);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: 10px;
    padding: 12px 16px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.5);
    opacity: 0;
    transform: translateY(-10px);
    pointer-events: none;
    transition: opacity 0.25s cubic-bezier(0.4, 0, 0.2, 1), transform 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  }

  nav#navMenu.open {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
  }

  nav#navMenu ul {
    flex-direction: column;
    align-items: stretch;
    gap: 8px;
    width: 140px;
  }

  nav#navMenu ul li {
    width: 100%;
  }

  nav#navMenu a {
    display: block;
    text-align: center;
    padding: 8px 12px;
  }

  nav#navMenu a[onclick*="history.back"] {
    margin-right: 0;
    border: 1px solid rgba(255, 255, 255, 0.15);
  }
}

/* Ensure no space above navbar, but leave room for content below it */
body {
  margin: 0;
  padding-top: 70px;
}