:root {
  --nav-bg: rgba(255, 255, 255, 0.96);
  --nav-border: rgba(148, 163, 184, 0.45);
  --nav-text: #0f172a;
  --nav-muted: #475569;
  --nav-hover-bg: rgba(15, 23, 42, 0.06);
  --nav-active-bg: #f8fafc;
  --nav-shadow: 0 8px 22px rgba(15, 23, 42, 0.08);
  --nav-radius: 12px;
}

body.theme-dark,
body.dark-mode,
body.nav-dark {
  --nav-bg: rgba(17, 24, 39, 0.92);
  --nav-border: rgba(148, 163, 184, 0.22);
  --nav-text: #e2e8f0;
  --nav-muted: #cbd5e1;
  --nav-hover-bg: rgba(148, 163, 184, 0.12);
  --nav-active-bg: rgba(31, 41, 55, 0.85);
  --nav-shadow: 0 12px 28px rgba(0, 0, 0, 0.38);
}

.site-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 10px 12px;
  margin: 10px 12px 14px;
  background: var(--nav-bg);
  border: 1px solid var(--nav-border);
  border-radius: var(--nav-radius);
  box-shadow: var(--nav-shadow);
  backdrop-filter: blur(10px);
  box-sizing: border-box;
  flex-wrap: nowrap;
  min-width: 0;
}

/* Base nav-brand styling for all pages */
.nav-brand {
  font-weight: 700;
  letter-spacing: 0.02em;
  font-size: 20px;
  white-space: nowrap;
  margin-right: 10px;
  text-decoration: none;
  cursor: pointer;
  position: relative;
  color: #0f172a;
}

/* Nav-brand in dark mode - all variants */
body.theme-dark .nav-brand,
body.dark-mode .nav-brand,
body.nav-dark .nav-brand {
  color: #f1f5f9;
}

.nav-brand:hover {
  text-decoration: none;
}

/* 8-bit retro styling ONLY on homepage */
body.home-page .nav-brand {
  font-weight: 800;
  letter-spacing: 0.05em;
  font-size: 18px;
  font-family: 'Press Start 2P', 'Courier New', monospace;
  text-transform: none;
  
  /* Static 8-bit retro green */
  color: #00ff88;
  -webkit-text-fill-color: #00ff88;
  
  /* Subtle static glow */
  filter: drop-shadow(0 0 4px rgba(0, 255, 136, 0.6)) drop-shadow(0 0 8px rgba(0, 255, 136, 0.3));
  transition: filter 0.2s ease, transform 0.2s ease;
  text-shadow: 
    2px 2px 0 #004422,
    -1px -1px 0 #002211;
}

body.home-page .nav-brand:hover {
  filter: drop-shadow(0 0 8px rgba(0, 255, 136, 0.9)) drop-shadow(0 0 12px rgba(0, 255, 136, 0.5));
  transform: scale(1.02);
}

body.home-page .nav-brand::before {
  content: '🏆';
  position: absolute;
  left: -24px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 14px;
  opacity: 1;
}

body.home-page .nav-brand::after {
  content: '';
  display: block;
  width: 100%;
  height: 3px;
  margin-top: 4px;
  background: #00ff88;
  border-radius: 0;
  opacity: 0.9;
  box-shadow: 0 0 4px rgba(0, 255, 136, 0.5);
}

.nav-right {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-left: auto;
  flex: 1 1 auto;
  justify-content: flex-end;
  min-width: 0;
  flex-wrap: nowrap;
  white-space: nowrap;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: nowrap;
  margin-left: 0;
  flex: 0 1 auto;
  white-space: nowrap;
  flex-shrink: 0;
}

.nav-links a {
  color: var(--nav-text);
  text-decoration: none;
  padding: 7px 9px;
  border-radius: 9px;
  border: 1px solid transparent;
  transition: all 0.15s ease;
  font-weight: 700;
  font-size: 15px;
  white-space: nowrap;
}

/* Links that should only show in the mobile dropdown */
.nav-mobile-only {
  display: none;
}

.nav-links a:hover {
  background: var(--nav-hover-bg);
  border-color: var(--nav-border);
}

.nav-links a.active {
  background: var(--nav-active-bg);
  border-color: var(--nav-border);
  box-shadow: 0 8px 18px rgba(0, 0, 0, 0.12);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-left: 4px;
  flex-wrap: nowrap;
  flex: 0 0 auto;
  white-space: nowrap;
  flex-shrink: 0;
}

/* Serial Lookup in Nav */
.nav-serial-lookup {
  display: flex;
  align-items: center;
  flex-shrink: 0;
}

.serial-lookup-form {
  display: flex;
  align-items: center;
  gap: 4px;
  margin: 0;
}

.serial-lookup-input {
  width: 90px;
  padding: 6px 10px;
  font-size: 13px;
  border: 1px solid var(--nav-border);
  border-radius: 8px;
  background: var(--nav-active-bg);
  color: var(--nav-text);
  outline: none;
  transition: all 0.15s ease;
}

.serial-lookup-input:focus {
  border-color: #6366f1;
  box-shadow: 0 0 0 2px rgba(99, 102, 241, 0.15);
  width: 120px;
}

.serial-lookup-input::placeholder {
  color: var(--nav-muted);
  opacity: 0.7;
}

.serial-lookup-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  padding: 0;
  border: 1px solid var(--nav-border);
  border-radius: 8px;
  background: var(--nav-active-bg);
  cursor: pointer;
  font-size: 14px;
  transition: all 0.15s ease;
}

.serial-lookup-btn:hover {
  background: var(--nav-hover-bg);
  border-color: #6366f1;
}

.nav-mobile-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 8px 12px;
  border-radius: 9px;
  border: 1px solid var(--nav-border);
  background: transparent;
  color: var(--nav-text);
  font-weight: 800;
  cursor: pointer;
  user-select: none;
}

.nav-mobile-toggle:hover {
  background: var(--nav-hover-bg);
}

.logout-link {
  color: #b91c1c;
  font-weight: 700;
  border: 1px solid transparent;
  padding: 8px 12px;
  border-radius: 9px;
  text-decoration: none;
  transition: all 0.15s ease;
  display: inline-flex;
  align-items: center;
  white-space: nowrap;
}

.logout-link:hover {
  border-color: #fecaca;
  background: #fff1f2;
}

@media (max-width: 900px) {
  .site-nav { flex-wrap: wrap; }
  .nav-right { width: 100%; justify-content: flex-start; }
  .nav-links { justify-content: flex-start; }
  .nav-actions { width: auto; margin-left: 0; }
}

.theme-toggle {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-weight: 700;
  color: var(--nav-muted);
  user-select: none;
}

.theme-toggle input {
  accent-color: #4f46e5;
}

@media (max-width: 900px) {
  .site-nav {
    justify-content: flex-start;
    margin: 10px 10px 14px;
    flex-wrap: wrap;
  }

  .nav-links,
  .nav-actions,
  .nav-right {
    flex-wrap: wrap;
  }
}

@media (max-width: 768px) {
  .site-nav {
    width: 100%;
    margin: 0;
    border-radius: 0;
    padding: 10px 12px;
    gap: 8px;
    flex-wrap: nowrap;
  }

  .nav-brand {
    width: auto;
  }

  .nav-right {
    width: auto;
    flex-direction: row;
    align-items: center;
    justify-content: flex-end;
    white-space: normal;
  }

  .nav-mobile-only {
    display: inline-flex;
  }

  /* When opened, allow the dropdown to stack below */
  .site-nav.nav-mobile-open {
    flex-wrap: wrap;
  }

  .site-nav.nav-mobile-open .nav-right {
    width: 100%;
    flex-direction: column;
    align-items: stretch;
  }

  .nav-mobile-toggle {
    display: inline-flex;
    align-self: flex-end;
  }

  .nav-links {
    width: 100%;
    display: none;
    flex-direction: column;
    gap: 6px;
    justify-content: flex-start;
    white-space: normal;
  }

  .nav-actions {
    width: 100%;
    display: none;
    justify-content: flex-start;
    margin-left: 0;
    white-space: normal;
  }

  .nav-serial-lookup {
    width: 100%;
    display: none;
    margin: 8px 0;
  }

  .site-nav.nav-mobile-open .nav-serial-lookup {
    display: flex;
  }

  .site-nav.nav-mobile-open .serial-lookup-form {
    width: 100%;
  }

  .site-nav.nav-mobile-open .serial-lookup-input {
    flex: 1;
    width: auto;
  }

  .site-nav.nav-mobile-open .nav-links,
  .site-nav.nav-mobile-open .nav-actions {
    display: flex;
  }

  .site-nav.nav-mobile-open .nav-right {
    max-height: 70vh;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
  }

  .nav-links a,
  .nav-actions a {
    width: 100%;
  }
}