:root {
  --nav-bg: #101826;
  --nav-border: #1f2a3a;
  --nav-text: #e8eef7;
  --nav-muted: #9fb0c5;
  --nav-accent: #2dd4bf;
}

#navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 48px;
  background: var(--nav-bg);
  border-bottom: 1px solid var(--nav-border);
  z-index: 10000;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 20px;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Arial;
  font-size: 14px;
}

#navbar .nav-links {
  display: flex;
  align-items: center;
  gap: 6px;
}

#navbar .nav-links a {
  color: var(--nav-muted);
  text-decoration: none;
  padding: 6px 12px;
  border-radius: 8px;
  transition: color 0.15s, background 0.15s;
}

#navbar .nav-links a:hover {
  color: var(--nav-text);
  background: rgba(255, 255, 255, 0.05);
}

#navbar .nav-links a.active {
  color: var(--nav-accent);
  background: rgba(45, 212, 191, 0.1);
}

#navbar .nav-brand {
  font-weight: 600;
  color: var(--nav-accent);
  text-decoration: none;
  margin-right: 12px;
  font-size: 15px;
}

/* Mobile brand in nav-right — hidden on desktop */
#navbar .nav-brand-mobile {
  display: none;
}

#navbar .nav-right {
  display: flex;
  align-items: center;
  gap: 12px;
}

#navbar .nav-user {
  color: var(--nav-muted);
  font-size: 13px;
}

#navbar .nav-logout {
  background: none;
  border: 1px solid var(--nav-border);
  color: var(--nav-muted);
  padding: 5px 12px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 13px;
  width: auto;
  transition: color 0.15s, border-color 0.15s;
}

#navbar .nav-logout:hover {
  color: var(--nav-text);
  border-color: var(--nav-text);
}

#navbar .nav-projects {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-left: 12px;
}

#navbar #projectSelect {
  background: #1a2332;
  border: 1px solid var(--nav-border);
  color: var(--nav-text);
  padding: 4px 8px;
  border-radius: 8px;
  font-size: 13px;
  max-width: 200px;
  outline: none;
}

#navbar #projectSelect option {
  background: #1a2332;
  color: var(--nav-text);
}

#navbar .nav-proj-btn {
  background: none;
  border: 1px solid var(--nav-border);
  color: var(--nav-muted);
  padding: 4px 8px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 12px;
  width: auto;
  transition: color 0.15s, border-color 0.15s;
}

#navbar .nav-proj-btn:hover {
  color: var(--nav-text);
  border-color: var(--nav-text);
}

#navbar .nav-proj-btn-danger {
  color: #ef4444;
  border-color: rgba(239, 68, 68, 0.35);
}

#navbar .nav-proj-btn-danger:hover {
  color: #f87171;
  border-color: #ef4444;
}

#navbar .nav-save-status {
  font-size: 11px;
  color: var(--nav-muted);
  min-width: 60px;
}

#navbar .nav-save-status.saving { color: #f59e0b; }
#navbar .nav-save-status.saved  { color: #22c55e; }
#navbar .nav-save-status.error  { color: #ef4444; }

#navbar .nav-share-label {
  color: var(--nav-muted);
  font-size: 13px;
  font-style: italic;
}

/* Hamburger button — hidden on desktop */
#navbar .nav-hamburger {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
  margin-right: 4px;
  width: auto;
  flex-shrink: 0;
}

#navbar .nav-hamburger span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--nav-muted);
  border-radius: 1px;
  transition: transform 0.2s, opacity 0.2s;
}

#navbar .nav-hamburger span + span {
  margin-top: 5px;
}

/* Hamburger → X animation when open */
#navbar.nav-open .nav-hamburger span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
#navbar.nav-open .nav-hamburger span:nth-child(2) {
  opacity: 0;
}
#navbar.nav-open .nav-hamburger span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Mobile dropdown panel */
#navbar .nav-mobile-panel {
  display: none;
}

@media (max-width: 768px) {
  #navbar {
    flex-wrap: wrap;
    height: auto;
    min-height: 48px;
    padding: 0 12px;
  }

  /* Top bar: brand + hamburger on left, right section on right */
  #navbar .nav-hamburger {
    display: flex;
    flex-direction: column;
    justify-content: center;
    order: -1;
  }

  /* Hide nav links and project controls from the top bar */
  #navbar .nav-links {
    display: none;
  }

  #navbar .nav-projects {
    display: none;
  }

  /* Show mobile brand in top bar */
  #navbar .nav-brand-mobile {
    display: inline !important;
    margin-right: auto;
  }

  #navbar .nav-right {
    gap: 8px;
    flex: 1;
  }

  #navbar .nav-user {
    display: none;
  }

  /* Mobile panel — full-width dropdown below top bar */
  #navbar.nav-open .nav-mobile-panel {
    display: flex;
    flex-direction: column;
    width: 100%;
    padding: 8px 0 12px;
    gap: 4px;
    border-top: 1px solid var(--nav-border);
  }

  #navbar .nav-mobile-panel .nav-mobile-links {
    display: flex;
    flex-direction: column;
    gap: 2px;
  }

  #navbar .nav-mobile-panel .nav-mobile-links a {
    color: var(--nav-muted);
    text-decoration: none;
    padding: 10px 12px;
    border-radius: 8px;
    font-size: 14px;
    transition: color 0.15s, background 0.15s;
  }

  #navbar .nav-mobile-panel .nav-mobile-links a:hover {
    color: var(--nav-text);
    background: rgba(255, 255, 255, 0.05);
  }

  #navbar .nav-mobile-panel .nav-mobile-links a.active {
    color: var(--nav-accent);
    background: rgba(45, 212, 191, 0.1);
  }

  /* Project controls in mobile panel */
  #navbar .nav-mobile-panel .nav-mobile-projects {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 6px;
    padding: 8px 12px 0;
    border-top: 1px solid var(--nav-border);
    margin-top: 4px;
  }

  #navbar .nav-mobile-panel .nav-mobile-projects select {
    background: #1a2332;
    border: 1px solid var(--nav-border);
    color: var(--nav-text);
    padding: 6px 10px;
    border-radius: 8px;
    font-size: 13px;
    flex: 1;
    min-width: 0;
    outline: none;
  }

  #navbar .nav-mobile-panel .nav-mobile-projects select option {
    background: #1a2332;
    color: var(--nav-text);
  }

  #navbar .nav-mobile-panel .nav-mobile-projects .nav-proj-btn {
    background: none;
    border: 1px solid var(--nav-border);
    color: var(--nav-muted);
    padding: 6px 10px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 12px;
    width: auto;
    transition: color 0.15s, border-color 0.15s;
  }

  #navbar .nav-mobile-panel .nav-mobile-projects .nav-proj-btn:hover {
    color: var(--nav-text);
    border-color: var(--nav-text);
  }

  #navbar .nav-mobile-panel .nav-mobile-projects .nav-proj-btn-danger {
    color: #ef4444;
    border-color: rgba(239, 68, 68, 0.35);
  }

  #navbar .nav-mobile-panel .nav-mobile-projects .nav-proj-btn-danger:hover {
    color: #f87171;
    border-color: #ef4444;
  }

  #navbar .nav-mobile-panel .nav-save-status {
    font-size: 11px;
    color: var(--nav-muted);
    padding-left: 12px;
  }

  #navbar .nav-mobile-panel .nav-save-status.saving { color: #f59e0b; }
  #navbar .nav-mobile-panel .nav-save-status.saved  { color: #22c55e; }
  #navbar .nav-mobile-panel .nav-save-status.error  { color: #ef4444; }

  #navbar .nav-mobile-panel .nav-mobile-user {
    color: var(--nav-muted);
    font-size: 12px;
    padding: 6px 12px 0;
    border-top: 1px solid var(--nav-border);
    margin-top: 4px;
  }
}

/* Desktop: keep original 640px tweaks for slightly smaller screens */
@media (min-width: 769px) and (max-width: 900px) {
  #navbar .nav-links a {
    padding: 6px 8px;
    font-size: 13px;
  }
  #navbar .nav-projects {
    gap: 4px;
    margin-left: 6px;
  }
  #navbar #projectSelect {
    max-width: 140px;
  }
  #navbar .nav-proj-btn {
    padding: 4px 6px;
    font-size: 11px;
  }
}

/* Brand-aligned page title — used in module headers (Builder/Analyzer/GPS/Stats) */
.brand-title {
  margin: 0;
  font-size: clamp(22px, 2.2vw, 28px);
  font-weight: 800;
  letter-spacing: -0.015em;
  line-height: 1.15;
  background: linear-gradient(135deg, #e8eef7 0%, #5eead4 55%, #2dd4bf 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  position: relative;
  padding-bottom: 8px;
  display: inline-block;
}
.brand-title::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 44px;
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--nav-accent), rgba(45, 212, 191, 0));
}