/* VersionMan ecosystem — shared nav & footer */
:root {
  --vm-primary: #3b82f6;
  --vm-primary-dark: #2563eb;
  --vm-bg: #f8fafc;
  --vm-surface: #ffffff;
  --vm-text: #1e293b;
  --vm-muted: #64748b;
  --vm-border: #e2e8f0;
  --vm-max: 1000px;
  --vm-radius: 12px;
}

.vm-eco-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.85rem 1.5rem;
  max-width: var(--vm-max);
  margin: 0 auto;
  gap: 1rem;
  flex-wrap: wrap;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
}

.vm-eco-logo {
  font-size: 1.15rem;
  font-weight: 800;
  text-decoration: none;
  color: var(--vm-text);
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  white-space: nowrap;
}

.vm-eco-logo:hover { color: var(--vm-primary); }
.vm-eco-logo img { height: 28px; vertical-align: middle; }

.vm-eco-links {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  flex-wrap: wrap;
}

.vm-eco-links > a,
.vm-eco-drop-btn {
  font-size: 0.85rem;
  color: var(--vm-muted);
  text-decoration: none;
  font-weight: 500;
  padding: 0.35rem 0.65rem;
  border-radius: 8px;
  transition: color 0.15s, background 0.15s;
  background: none;
  border: none;
  cursor: pointer;
  font-family: inherit;
}

.vm-eco-links > a:hover,
.vm-eco-drop-btn:hover,
.vm-eco-drop.open .vm-eco-drop-btn {
  color: var(--vm-primary);
  background: #eff6ff;
}

.vm-eco-links > a.active {
  color: var(--vm-primary);
  font-weight: 600;
}

.vm-eco-drop { position: relative; }

.vm-eco-drop-menu {
  display: none;
  position: absolute;
  top: calc(100% + 0.35rem);
  left: 0;
  min-width: 210px;
  background: var(--vm-surface);
  border: 1px solid var(--vm-border);
  border-radius: var(--vm-radius);
  box-shadow: 0 8px 24px rgba(0,0,0,0.08);
  padding: 0.35rem;
  z-index: 100;
}

.vm-eco-drop.open .vm-eco-drop-menu { display: block; }

.vm-eco-drop-menu a {
  display: block;
  padding: 0.55rem 0.75rem;
  font-size: 0.85rem;
  color: var(--vm-text);
  text-decoration: none;
  border-radius: 8px;
}

.vm-eco-drop-menu a:hover { background: #eff6ff; color: var(--vm-primary); }
.vm-eco-drop-menu a.active { color: var(--vm-primary); font-weight: 600; }
.vm-eco-drop-menu .sub { font-size: 0.75rem; color: var(--vm-muted); display: block; margin-top: 0.1rem; }

.vm-eco-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.vm-eco-lang {
  background: none;
  border: 1px solid var(--vm-border);
  border-radius: 50px;
  padding: 0.3rem 0.85rem;
  font-size: 0.78rem;
  font-weight: 600;
  cursor: pointer;
  color: var(--vm-muted);
  font-family: inherit;
}

.vm-eco-lang:hover {
  background: var(--vm-primary);
  color: #fff;
  border-color: var(--vm-primary);
}

.vm-eco-bar {
  border-bottom: 1px solid var(--vm-border);
  background: var(--vm-surface);
}

.vm-eco-product-nav {
  border-bottom: 1px solid var(--vm-border);
  background: var(--vm-bg);
}

.vm-eco-attribution {
  text-align: center;
  font-size: 0.8rem;
  color: var(--vm-muted);
  padding: 0.5rem 1rem 0;
}

.vm-eco-attribution a {
  color: var(--vm-primary);
  text-decoration: none;
  font-weight: 500;
}

.vm-eco-attribution a:hover { text-decoration: underline; }

.vm-eco-footer {
  text-align: center;
  padding: 2rem 1.5rem;
  border-top: 1px solid var(--vm-border);
  color: var(--vm-muted);
  font-size: 0.85rem;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', sans-serif;
}

.vm-eco-footer a {
  color: var(--vm-primary);
  text-decoration: none;
}

.vm-eco-footer a:hover { text-decoration: underline; }

.vm-eco-footer-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  max-width: var(--vm-max);
  margin: 0 auto 1.5rem;
  text-align: left;
}

.vm-eco-footer-grid h4 {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--vm-text);
  margin-bottom: 0.5rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.vm-eco-footer-grid ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.vm-eco-footer-grid li { margin-bottom: 0.35rem; }
.vm-eco-footer-grid a { font-size: 0.82rem; }

.vm-eco-tagline {
  font-size: 0.78rem;
  color: #94a3b8;
  margin-top: 0.75rem;
}

@media (max-width: 640px) {
  .vm-eco-footer-grid { grid-template-columns: 1fr; text-align: center; }
  .vm-eco-drop-menu { left: auto; right: 0; }
}