#sidebar {
  width: var(--sidebar-width);
  height: 100vh;
  border-right: 1px solid var(--glass-border);
  background: rgba(15, 15, 20, 0.6);
  backdrop-filter: var(--blur);
  -webkit-backdrop-filter: var(--blur);
  display: flex;
  flex-direction: column;
  padding: 20px 0;
  z-index: 100;
  border-radius: 0;
  flex-shrink: 0;
}

.sidebar-header {
  padding: 0 20px 20px;
  border-bottom: 1px solid var(--glass-border);
  margin-bottom: 16px;
}

.logo {
  font-size: 20px;
  font-weight: 700;
  color: #fff;
  display: flex;
  align-items: center;
  gap: 10px;
}

.logo svg {
  width: 24px;
  height: 24px;
  color: var(--accent);
}

.nav-links {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 0 12px;
  flex: 1;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 16px;
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  font-size: 14px;
  font-weight: 500;
  text-decoration: none;
  transition: all 0.2s;
}

.nav-link svg {
  width: 18px;
  height: 18px;
}

.nav-link:hover {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-main);
}

.nav-link.active {
  background: var(--accent-glow);
  color: #fff;
  border-left: 3px solid var(--accent);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

.sidebar-footer {
  padding: 20px;
  border-top: 1px solid var(--glass-border);
  margin-top: auto;
}

.model-selector {
  width: 100%;
  background: rgba(0,0,0,0.3);
  border: 1px solid var(--glass-border);
  appearance: none;
  background-image: url("data:image/svg+xml;charset=US-ASCII,%3Csvg%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%20width%3D%22292.4%22%20height%3D%22292.4%22%3E%3Cpath%20fill%3D%22%239ca3af%22%20d%3D%22M287%2069.4a17.6%2017.6%200%200%200-13-5.4H18.4c-5%200-9.3%201.8-12.9%205.4A17.6%2017.6%200%200%200%200%2082.2c0%205%201.8%209.3%205.4%2012.9l128%20127.9c3.6%203.6%207.8%205.4%2012.8%205.4s9.2-1.8%2012.8-5.4L287%2095c3.5-3.5%205.4-7.8%205.4-12.8%200-5-1.9-9.2-5.5-12.8z%22%2F%3E%3C%2Fsvg%3E");
  background-repeat: no-repeat;
  background-position: right 12px top 50%;
  background-size: 10px auto;
  font-size: 13px;
  cursor: pointer;
}