.design-panel {
  position: fixed;
  top: 16px;
  right: 16px;
  z-index: 50;
  display: inline-flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  padding: 10px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: color-mix(in srgb, var(--surface-strong) 90%, transparent);
  box-shadow: var(--shadow-sm);
  backdrop-filter: blur(18px);
}

.design-panel .group-label {
  margin-right: 4px;
  padding: 0 8px;
  color: var(--muted);
  font-size: 0.82rem;
  letter-spacing: 0.02em;
}

.design-panel button {
  appearance: none;
  border: 1px solid var(--line);
  background: transparent;
  color: var(--muted);
  padding: 9px 12px;
  border-radius: 999px;
  cursor: pointer;
  transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
}

.design-panel button:hover {
  transform: translateY(-1px);
  color: var(--text);
  border-color: color-mix(in srgb, var(--accent) 40%, var(--line));
}

.design-panel button[aria-pressed="true"] {
  color: var(--text);
  border-color: color-mix(in srgb, var(--accent) 50%, var(--line));
  background: var(--accent-soft);
}

@media (max-width: 720px) {
  .design-panel {
    left: 16px;
    right: 16px;
    justify-content: space-between;
    border-radius: 24px;
  }
}