#sidebar {
  width: var(--sidebar-width);
  height: 100vh;
  background: var(--bg-sidebar);
  border-right: 1px solid var(--border-primary);
  display: flex;
  flex-direction: column;
  transition: all var(--transition-normal);
  overflow: hidden;
  flex-shrink: 0;
}

.sidebar-header {
  padding: 20px 20px 16px;
  border-bottom: 1px solid var(--border-primary);
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
}

.logo-icon {
  width: 36px;
  height: 36px;
  color: var(--primary);
  flex-shrink: 0;
}

.logo-text {
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.logo-title {
  font-size: var(--font-size-md);
  font-weight: 700;
  color: var(--text-primary);
  white-space: nowrap;
}

.logo-subtitle {
  font-size: var(--font-size-xs);
  color: var(--text-secondary);
  white-space: nowrap;
  letter-spacing: 0.3px;
}

.nav-menu {
  list-style: none;
  padding: 12px 10px;
  flex: 1;
  overflow-y: auto;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 11px 16px;
  border-radius: var(--border-radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
  margin-bottom: 2px;
  color: var(--text-secondary);
  font-weight: 500;
  font-size: var(--font-size-base);
}

.nav-item svg {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}

.nav-item:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
}

.nav-item.active {
  background: var(--primary-bg);
  color: var(--primary);
  font-weight: 600;
}

.nav-divider {
  height: 1px;
  background: var(--border-primary);
  margin: 8px 16px;
}

.sidebar-footer {
  padding: 16px 20px;
  border-top: 1px solid var(--border-primary);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border: 1px solid var(--border-primary);
  border-radius: var(--border-radius-sm);
  background: transparent;
  cursor: pointer;
  transition: all var(--transition-fast);
  color: var(--text-secondary);
}

.theme-toggle:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
}

.theme-toggle svg {
  width: 18px;
  height: 18px;
}

[data-theme="light"] .moon-icon { display: none; }
[data-theme="dark"] .sun-icon { display: none; }
[data-theme="light"] .sun-icon { display: block; }
[data-theme="dark"] .moon-icon { display: block; }

.sidebar-version {
  font-size: var(--font-size-xs);
  color: var(--text-tertiary);
}