header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 1.5rem;
  z-index: 10;
}

#model-selector-container {
  position: relative;
}

#model-trigger {
  background: transparent;
  color: var(--muted-text-color);
  border: none;
  font-size: 1.1rem;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem;
  border-radius: 0.5rem;
}

#model-trigger:hover {
  background-color: var(--hover-color);
  color: var(--text-color);
}

#model-dropdown {
  position: absolute;
  top: 100%;
  left: 0;
  background-color: var(--surface-color);
  border: 1px solid var(--border-color);
  border-radius: 0.75rem;
  padding: 0.5rem;
  min-width: 200px;
  display: none;
  flex-direction: column;
  gap: 0.25rem;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.5);
  z-index: 20;
}

#model-dropdown.show {
  display: flex;
}

.model-option {
  padding: 0.75rem;
  border-radius: 0.5rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: var(--muted-text-color);
}

.model-option:hover {
  background-color: var(--hover-color);
  color: var(--text-color);
}

.model-option.selected {
  color: var(--primary-color);
}

.model-option.selected::after {
  content: '✓';
}

#auth-buttons {
  display: flex;
  gap: 1rem;
}

.auth-btn {
  background: transparent;
  border: none;
  color: var(--text-color);
  cursor: pointer;
  font-weight: 500;
  padding: 0.5rem 1rem;
  border-radius: 0.5rem;
}

.auth-btn:hover {
  background-color: var(--hover-color);
}

.auth-btn.primary {
  background-color: var(--primary-color);
  color: black;
}

.auth-btn.primary:hover {
  opacity: 0.9;
  background-color: #e0e0e0;
}

#settings-btn {
  background: transparent;
  border: none;
  color: var(--muted-text-color);
  cursor: pointer;
  padding: 0.5rem;
  border-radius: 0.5rem;
  display: flex;
  align-items: center;
}

#settings-btn:hover {
  color: var(--text-color);
  background-color: var(--hover-color);
}