/* =============================================================================
   Design switcher (a dropdown in each design's nav) + load-failure banner.
   Shared by every design, so it carries its own tokens (prefixed --pds-) rather
   than borrowing a design's. Light theme redefines the tokens only.
============================================================================= */

:root {
  --pds-bg: #161b22;
  --pds-fg: #e6edf3;
  --pds-muted: #9aa7b4;
  --pds-line: rgba(255, 255, 255, 0.18);
  --pds-hover: rgba(255, 255, 255, 0.1);
  --pds-on-bg: #e6edf3;
  --pds-on-fg: #0d1117;
  --pds-focus: #58a6ff;
}

:root[data-theme="light"] {
  --pds-bg: #ffffff;
  --pds-fg: #1f2328;
  --pds-muted: #57606a;
  --pds-line: rgba(0, 0, 0, 0.18);
  --pds-hover: rgba(0, 0, 0, 0.06);
  --pds-on-bg: #1f2328;
  --pds-on-fg: #ffffff;
  --pds-focus: #0969da;
}

/* The nav slot is empty (and takes no space) until the picker moves in. */
[data-design-slot]:empty { display: none; }

.pds-root {
  position: relative;
  display: inline-block;
  color: var(--pds-fg);
  font: 600 14px/1 system-ui, -apple-system, "Segoe UI", sans-serif;
}

/* No slot in the design: a fixed button in the top-right corner. */
.pds-root.pds-floating { position: fixed; top: 12px; right: 12px; z-index: 9000; }

.pds-trigger {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-height: 36px;
  padding: 0 12px;
  border: 1px solid var(--pds-line);
  border-radius: 8px;
  background: transparent;
  color: inherit;
  font: inherit;
  cursor: pointer;
  white-space: nowrap;
}
.pds-trigger:hover { background: var(--pds-hover); }
.pds-trigger:focus-visible,
.pds-opt:focus-visible { outline: 2px solid var(--pds-focus); outline-offset: 2px; }
.pds-chevron { font-size: 11px; opacity: 0.7; }
.pds-trigger[aria-expanded="true"] .pds-chevron { transform: rotate(180deg); }

@media (pointer: coarse) {
  .pds-trigger { min-height: 44px; }
}

.pds-panel {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  z-index: 9001;
  width: 260px;
  max-width: calc(100vw - 24px);
  padding: 8px;
  border: 1px solid var(--pds-line);
  border-radius: 12px;
  background: var(--pds-bg);
  box-shadow: 0 14px 40px rgba(0, 0, 0, 0.35);
}
.pds-panel[hidden] { display: none; }

.pds-heading {
  padding: 6px 10px 8px;
  color: var(--pds-muted);
  font-size: 11px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.pds-opt {
  display: flex;
  flex-direction: column;
  gap: 3px;
  width: 100%;
  min-height: 44px;
  padding: 8px 10px;
  border: 0;
  border-radius: 8px;
  background: transparent;
  color: inherit;
  font: inherit;
  text-align: left;
  cursor: pointer;
}
.pds-opt:hover { background: var(--pds-hover); }
.pds-opt[aria-checked="true"] { background: var(--pds-on-bg); color: var(--pds-on-fg); }
.pds-opt-desc { font-weight: 400; font-size: 12px; line-height: 1.35; opacity: 0.75; }

.pds-live {
  position: absolute;
  width: 1px; height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

.pds-banner {
  position: fixed;
  left: 16px; right: 16px; bottom: 16px;
  z-index: 9100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 14px;
  background: var(--pds-bg);
  color: var(--pds-fg);
  border: 1px solid var(--pds-line);
  border-radius: 10px;
  box-shadow: 0 8px 28px rgba(0, 0, 0, 0.3);
  font: 500 14px/1.4 system-ui, -apple-system, "Segoe UI", sans-serif;
}

.pds-banner button {
  min-height: 44px;
  padding: 0 14px;
  border: 1px solid var(--pds-line);
  border-radius: 8px;
  background: transparent;
  color: inherit;
  font: inherit;
  cursor: pointer;
}

@media (max-width: 420px) {
  .pds-trigger { padding: 0 10px; }
}