/* Portal hub — Preview/Code example cards
 *
 * A self-contained, TailwindUI-style Preview/Code component for the portal
 * hub pages. Adapted from system.css's .ds-code-panel / .ds-tab-group /
 * .ds-copy-btn rules so the hubs don't need to load system.css or
 * system-shell.js. Rendered from <div class="px-example"> markup by
 * portal-examples.js. Depends only on tokens.css variables + icons.js.
 */

.px-examples { display: grid; gap: 22px; margin-top: 26px; min-width: 0; }

.px-card {
  border: 1px solid var(--border);
  border-radius: 14px;
  background: var(--surface);
  overflow: clip;
  box-shadow: 0 1px 2px rgba(22, 24, 29, 0.04);
  min-width: 0;
  max-width: 100%;
}

/* ── Toolbar (Preview | Code tabs + copy) ─────────────────────────── */
.px-toolbar {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 14px;
  border-bottom: 1px solid var(--border);
  background: var(--surface);
  flex-wrap: wrap;
}
.px-toolbar .px-title {
  font: 500 11px/1 var(--font-sans);
  font-weight: 600;
  color: var(--text-strong);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
.px-toolbar .px-spacer { flex: 1; }

.px-tab-group {
  display: inline-flex;
  align-items: center;
  gap: 2px;
  padding: 3px;
  background: var(--surface-muted);
  border-radius: 8px;
}
.px-tab-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  height: 26px;
  padding: 0 10px;
  border: 0;
  background: transparent;
  border-radius: 6px;
  color: var(--text-muted);
  font: 500 12px/1 var(--font-sans);
  cursor: pointer;
  transition: background 120ms ease, color 120ms ease;
}
.px-tab-btn:hover { color: var(--text-strong); }
.px-tab-btn[aria-pressed="true"] {
  background: var(--surface);
  color: var(--text-strong);
  box-shadow: 0 1px 2px rgba(22, 24, 29, 0.06), 0 0 0 1px var(--border);
}
.px-tab-btn [data-icon] { color: currentColor; }

.px-copy-btn {
  display: none;
  align-items: center;
  gap: 6px;
  height: 28px;
  padding: 0 10px;
  border: 1px solid var(--border);
  background: var(--surface);
  border-radius: 8px;
  color: var(--text-strong);
  font: 500 12px/1 var(--font-sans);
  cursor: pointer;
  transition: background 120ms ease;
}
.px-copy-btn:hover { background: var(--surface-muted); }
.px-copy-btn [data-icon] { color: currentColor; }
.px-card[data-tab="code"] .px-copy-btn { display: inline-flex; }

/* ── Preview stage (white, generous padding) ──────────────────────── */
.px-preview {
  background: var(--canvas);
  padding: 32px 28px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
  scrollbar-color: var(--border-strong) transparent;
}
.px-preview[hidden] { display: none; }
.px-preview::-webkit-scrollbar { height: 8px; }
.px-preview::-webkit-scrollbar-thumb { background: var(--border-strong); border-radius: 4px; }
.px-preview::-webkit-scrollbar-track { background: transparent; }
.px-preview-stage { min-width: 0; }

/* ── Code panel (dark, line numbers) ──────────────────────────────── */
.px-code-panel {
  background: var(--ink, #16181D);
  color: #E4E7EE;
}
.px-code-panel[hidden] { display: none; }
.px-code-header {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 12px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.02), transparent);
}
.px-code-header .px-spacer { flex: 1; }
.px-code-filename {
  font: 500 11.5px/1 var(--font-mono);
  color: rgba(228, 231, 238, 0.55);
  letter-spacing: 0.02em;
}
.px-code-fw {
  display: inline-flex;
  align-items: center;
  gap: 2px;
  padding: 3px;
  border-radius: 7px;
  background: rgba(255, 255, 255, 0.04);
}
.px-code-fw-btn {
  display: inline-flex;
  align-items: center;
  height: 22px;
  padding: 0 9px;
  border: 0;
  background: transparent;
  border-radius: 5px;
  color: rgba(228, 231, 238, 0.55);
  font: 500 11.5px/1 var(--font-sans);
  cursor: pointer;
  transition: background 120ms ease, color 120ms ease;
}
.px-code-fw-btn:hover { color: #fff; }
.px-code-fw-btn[aria-pressed="true"] {
  background: rgba(255, 255, 255, 0.08);
  color: #fff;
}

.px-code-body-wrap {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
  scrollbar-color: rgba(255, 255, 255, 0.18) transparent;
}
.px-code-body-wrap::-webkit-scrollbar { height: 8px; }
.px-code-body-wrap::-webkit-scrollbar-thumb { background: rgba(255, 255, 255, 0.18); border-radius: 4px; }
.px-code-block {
  display: grid;
  grid-template-columns: max-content 1fr;
  align-items: stretch;
  min-width: max-content;
  font-family: var(--font-mono);
  font-size: 12.5px;
  line-height: 1.6;
}
.px-code-gutter {
  margin: 0;
  padding: 16px 12px 16px 16px;
  text-align: right;
  color: rgba(228, 231, 238, 0.28);
  user-select: none;
  border-right: 1px solid rgba(255, 255, 255, 0.05);
  white-space: pre;
  font: inherit;
}
.px-code-body {
  margin: 0;
  padding: 16px 18px;
  white-space: pre;
  color: #E4E7EE;
  font: inherit;
  overflow: visible;
}
.px-code-body code { font: inherit; color: inherit; background: transparent; padding: 0; }
.px-code-block .k { color: #C99CFF; }
.px-code-block .s { color: #FFB896; }
.px-code-block .v { color: #7CCEFF; }
.px-code-block .c { color: #6E7480; font-style: italic; }

/* ── Toast (copy feedback) ────────────────────────────────────────── */
.px-toast-host {
  position: fixed;
  top: 24px;
  right: 24px;
  z-index: 200;
  display: flex;
  flex-direction: column;
  gap: 8px;
  pointer-events: none;
}
.px-toast {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  border-radius: 10px;
  background: var(--ink, #16181D);
  color: #fff;
  font: 500 13px/1 var(--font-sans);
  box-shadow: 0 8px 24px rgba(22, 24, 29, 0.25);
  animation: px-toast-in 200ms ease;
  pointer-events: auto;
}
.px-toast [data-icon] { color: var(--tone-success, #16a34a); }
.px-toast.out { animation: px-toast-out 200ms ease forwards; }
@keyframes px-toast-in {
  from { opacity: 0; transform: translateY(-6px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes px-toast-out {
  to { opacity: 0; transform: translateY(-6px); }
}

/* ── Mobile ───────────────────────────────────────────────────────── */
@media (max-width: 640px) {
  .px-toolbar { padding: 8px 10px; gap: 8px; }
  .px-toolbar .px-title { display: none; }
  .px-preview { padding: 22px 16px; }
  .px-toast-host { top: 16px; right: 16px; left: 16px; }
}