/* The playground pages' chrome, shared by every generated demo page in every
 * framework layer.
 *
 * It lives here rather than in a layer because check:layer-independence scans
 * both trees textually and its exemption map is empty: a stylesheet under
 * frameworks/react/ that frameworks/angular/ also linked would be a coupling the
 * gate exists to kill. Outside frameworks/ there is nothing to couple, and the
 * two layers then render the same page furniture from the same bytes, which is
 * the whole reason a difference seen on one page is a difference in a component.
 *
 * Every control below is plain HTML rather than an Arena component. The panel
 * sits beside the thing under test, so a panel built from the library would
 * change appearance with the change being examined, and in the Angular layer it
 * would drag the library into a harness that has to stay independent of it.
 */

.pg-page {
  margin: 0;
  padding: var(--sp-6);
  background: var(--bg);
  color: var(--text-strong);
  font-family: var(--font-body);
  line-height: var(--lh-body);
}

.pg-head {
  margin: 0 0 var(--sp-5);
  max-width: 60ch;
}

.pg-eyebrow {
  margin: 0 0 var(--sp-1);
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  letter-spacing: var(--ls-label);
  text-transform: uppercase;
  color: var(--text-muted);
}

.pg-title {
  margin: 0;
  font-family: var(--font-display);
  font-size: var(--fs-h2);
  font-weight: var(--fw-bold);
  letter-spacing: var(--ls-tight);
  line-height: var(--lh-tight);
}

.pg-note {
  margin: var(--sp-2) 0 0;
  font-size: var(--fs-sm);
  color: var(--text-body);
}

.pg-shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 24rem);
  gap: var(--sp-6);
  align-items: start;
}

@media (max-width: 60rem) {
  .pg-shell { grid-template-columns: minmax(0, 1fr); }
}

/* The stage is deliberately plain: a surface tint here would sit behind every
 * component and make one layer's transparency look like the other's fill. */
.pg-stage {
  min-height: calc(var(--sp-24) * 2);
  padding: var(--sp-5);
  border: var(--bw) solid var(--border);
  border-radius: var(--r-lg);
  background: var(--panel);
}

.pg-panel {
  display: flex;
  flex-direction: column;
  gap: var(--sp-4);
  padding: var(--sp-5);
  border: var(--bw) solid var(--border);
  border-radius: var(--r-lg);
  background: var(--surface-card);
  position: sticky;
  top: var(--sp-6);
  max-height: calc(100vh - var(--sp-12));
  overflow-y: auto;
}

@media (max-width: 60rem) {
  .pg-panel { position: static; max-height: none; }
}

.pg-panel-title {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  letter-spacing: var(--ls-label);
  text-transform: uppercase;
  color: var(--text-muted);
}

.pg-knob {
  display: flex;
  flex-direction: column;
  gap: var(--sp-1);
}

.pg-knob-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--sp-2);
}

.pg-knob-name {
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
  color: var(--text-strong);
}

.pg-knob-form {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  color: var(--mute);
}

.pg-knob-doc {
  margin: 0;
  font-size: var(--fs-xs);
  color: var(--text-muted);
}

/* A required member cannot be unbound, so it carries no presence box and says
 * so rather than showing a disabled control nobody can explain. */
.pg-knob-pinned .pg-knob-form { color: var(--gold); }

/* A form control takes its line-height and its margin from the browser unless something
 * says otherwise, and one layer's page also links the compiled utility sheet, whose reset
 * does say otherwise: the same text field measured five pixels taller there and the same
 * checkbox one pixel shorter, once per row. Stating both here is what makes this file
 * shared rather than merely copied, because the frame must not depend on what else a page
 * happens to link. The spacing beside a control is the flex gap, never a margin. */
.pg-panel input,
.pg-panel select,
.pg-panel textarea {
  margin: 0;
}

.pg-field {
  width: 100%;
  box-sizing: border-box;
  line-height: var(--lh-body);
  padding: var(--sp-2) var(--sp-3);
  background: var(--surface-input);
  color: var(--text-strong);
  border: var(--bw) solid var(--border);
  border-radius: var(--r-sm);
  font-family: var(--font-body);
  font-size: var(--fs-sm);
}

.pg-field:focus-visible {
  outline: var(--focus-width) solid var(--focus-ring);
  outline-offset: var(--focus-offset);
}

textarea.pg-field {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  min-height: calc(var(--sp-16) + var(--sp-4));
  resize: vertical;
}

.pg-field-invalid { border-color: var(--danger); }

.pg-check {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  font-size: var(--fs-sm);
  color: var(--text-body);
}

.pg-presence {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  letter-spacing: var(--ls-label);
  text-transform: uppercase;
  color: var(--mute);
}

.pg-log {
  margin: var(--sp-6) 0 0;
  padding: var(--sp-4);
  border: var(--bw) solid var(--border);
  border-radius: var(--r-lg);
  background: var(--panel);
}

.pg-log-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--sp-2);
  margin-bottom: var(--sp-2);
}

.pg-log-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--sp-1);
  max-height: calc(var(--sp-24) + var(--sp-16));
  overflow-y: auto;
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
}

.pg-log-row { color: var(--text-body); }
.pg-log-name { color: var(--accent); }
.pg-log-empty { color: var(--mute); }

.pg-reset {
  align-self: flex-start;
  padding: var(--sp-1) var(--sp-3);
  background: transparent;
  color: var(--text-muted);
  border: var(--bw) solid var(--border);
  border-radius: var(--r-pill);
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  line-height: var(--lh-body);
  letter-spacing: var(--ls-label);
  text-transform: uppercase;
  cursor: pointer;
  transition: color var(--dur-fast) var(--ease-out);
}

.pg-reset:hover { color: var(--text-strong); }

.pg-reset:focus-visible {
  outline: var(--focus-width) solid var(--focus-ring);
  outline-offset: var(--focus-offset);
}

@media (prefers-reduced-motion: reduce) {
  .pg-reset { transition: none; }
}