/*
 * PairRail v2 /protocols: the live protocol lab and the protocol inspector.
 * Requires tokens.css, components.css, pages.css. app.js drives the lab tabs (toggles .is-active on
 * .protocol-lab-tabs buttons and .protocol-lab-card) and the inspector (hidden attr, .view-toggle-btn.active,
 * #protocol-summary HTML with .summary-* classes). protocols.js adds dialog behaviour.
 * The inspector's raw JSON is the page's one dark surface.
 */

/* -- Lab tabs: a segmented row -- */
.pr-lab__tabs {
  display: inline-flex;
  flex-wrap: wrap;
  gap: 2px;
  margin-bottom: var(--space-5);
  padding: 3px;
  border: var(--hairline);
  border-radius: calc(var(--radius-control) + 3px);
  background: var(--color-subtle);
}
.pr-lab__tabs button {
  min-height: 36px;
  padding: 0 var(--space-4);
  border: 0;
  border-radius: var(--radius-control);
  background: transparent;
  color: var(--color-ink-secondary);
  font: 500 var(--type-small-size) / 1 var(--font-mono);
  letter-spacing: 0.02em;
  cursor: pointer;
  transition: background-color var(--motion-ui) var(--motion-ease-out), color var(--motion-ui) var(--motion-ease-out);
}
.pr-lab__tabs button.is-active { background: var(--color-canvas); color: var(--color-ink); box-shadow: var(--shadow-chip); }
.pr-lab__tabs button:active { background: var(--color-sunken); }
.pr-lab__tabs button:focus-visible { outline: var(--focus-ring); outline-offset: 1px; }
@media (hover: hover) and (pointer: fine) { .pr-lab__tabs button:not(.is-active):hover { color: var(--color-ink); } }

/* -- Lab panel: only the active rail shows -- */
.pr-lab__card:not(.is-active) { display: none; }
/* A #rail-x deep link lands on the lab with its tabs in view, not on the bare card. */
#protocol-lab { scroll-margin-top: var(--space-6); }
.pr-lab__card {
  display: grid;
  gap: var(--space-6);
  padding: var(--space-6);
  border: var(--hairline);
  border-radius: var(--radius-card);
  background: var(--color-canvas);
  box-shadow: var(--shadow-chip);
}
.pr-lab__main header h3 { margin: 0 0 var(--space-2); color: var(--color-ink); font-size: var(--type-h3-size); font-weight: var(--type-h3-weight); line-height: var(--type-h3-leading); letter-spacing: var(--type-h3-tracking); }
.pr-lab__main header p:last-child { max-width: 40em; }
.pr-lab__meta { margin: var(--space-5) 0 0; border-top: var(--hairline); }
.pr-lab__meta > div { display: grid; gap: var(--space-1) var(--space-5); padding-block: var(--space-3); border-bottom: var(--hairline); }
.pr-lab__meta dt { color: var(--color-ink-muted); font-size: var(--type-small-size); line-height: var(--type-small-leading); }
.pr-lab__meta dd { margin: 0; color: var(--color-ink-secondary); min-width: 0; overflow-wrap: anywhere; }
.pr-lab__meta--compact { margin-top: var(--space-4); }
.pr-lab__meta--compact > div { padding-block: var(--space-2); }
@media (min-width: 768px) {
  .pr-lab__meta > div { grid-template-columns: 180px minmax(0, 1fr); }
  .pr-lab__meta--compact > div { grid-template-columns: 90px minmax(0, 1fr); }
}
.pr-lab__main .pr-actions { margin-top: var(--space-5); }
.pr-lab__signal {
  display: grid;
  align-content: start;
  gap: var(--space-2);
  padding: var(--space-5);
  border-radius: var(--radius-control);
  background: var(--color-subtle);
}
.pr-lab__signal span { color: var(--color-ink-muted); font: 500 var(--type-eyebrow-size) / var(--type-eyebrow-leading) var(--font-mono); letter-spacing: var(--type-eyebrow-tracking); text-transform: uppercase; }
.pr-lab__signal strong { color: var(--color-ink); font: 500 var(--type-body-lg-size) / 28px var(--font-mono); overflow-wrap: anywhere; }
.pr-lab__signal p { color: var(--color-ink-secondary); }
@media (min-width: 1024px) {
  .pr-lab__card { grid-template-columns: minmax(0, 1fr) 280px; align-items: start; }
}
.pr-lab .pr-note { margin-top: var(--space-5); }

/* -- Inspector modal -- */
.pr-modal[hidden] { display: none; }
.pr-modal {
  position: fixed;
  inset: 0;
  z-index: 60;
  display: grid;
  place-items: center;
  padding: var(--space-4);
}
.pr-modal__backdrop { position: absolute; inset: 0; background: var(--color-overlay); }
.pr-modal__card {
  position: relative;
  display: grid;
  grid-template-rows: auto auto minmax(0, 1fr) auto;
  width: min(720px, 100%);
  max-height: min(760px, calc(100vh - var(--space-7)));
  max-height: min(760px, calc(100dvh - var(--space-7)));
  overflow: hidden;
  border-radius: var(--radius-card);
  background: var(--color-canvas);
  box-shadow: 0 0 0 1px rgba(0, 0, 0, 0.06), 0 20px 40px -12px rgba(0, 0, 0, 0.22);
  font-family: var(--font-sans);
}
/* Opens centred (modals are not anchored to a trigger), fast, ease-out; no movement under reduced motion. */
@media (prefers-reduced-motion: no-preference) {
  .pr-modal:not([hidden]) .pr-modal__card { animation: pr-modal-in 200ms var(--motion-ease-out); }
  .pr-modal:not([hidden]) .pr-modal__backdrop { animation: pr-fade-in 200ms var(--motion-ease-out); }
}
@keyframes pr-modal-in { from { opacity: 0; transform: scale(0.97); } }
@keyframes pr-sheet-in { from { transform: translateY(24px); opacity: 0; } }
@media (prefers-reduced-motion: no-preference) and (max-width: 767.98px) {
  /* On phones it is a bottom sheet: it rises from the edge it is attached to. */
  .pr-modal:not([hidden]) .pr-modal__card { animation: pr-sheet-in 240ms cubic-bezier(0.32, 0.72, 0, 1); }
}
@keyframes pr-fade-in { from { opacity: 0; } }
.pr-modal__head { display: flex; align-items: flex-start; justify-content: space-between; gap: var(--space-4); padding: var(--space-5) var(--space-5) var(--space-4); }
.pr-modal__head .pr-eyebrow { margin-bottom: var(--space-2); }
.pr-modal__endpoint { display: block; margin-top: var(--space-2); color: var(--color-ink-muted); font: var(--type-caption-size) / 18px var(--font-mono); overflow-wrap: anywhere; }
.pr-modal__close {
  display: grid;
  place-items: center;
  flex: none;
  width: 40px;
  height: 40px;
  border: var(--hairline);
  border-radius: var(--radius-control);
  background: var(--color-canvas);
  color: var(--color-ink);
  cursor: pointer;
}
.pr-modal__close:focus-visible { outline: var(--focus-ring); outline-offset: var(--focus-ring-offset); }
.pr-modal__close:active { background: var(--color-sunken); }
@media (hover: hover) and (pointer: fine) { .pr-modal__close:hover { background: var(--color-subtle); } }
.pr-modal__views { display: flex; gap: var(--space-5); padding: 0 var(--space-5); border-bottom: var(--hairline); }
.pr-modal__views button {
  min-height: 40px;
  padding: 0;
  border: 0;
  border-bottom: 2px solid transparent;
  background: none;
  color: var(--color-ink-muted);
  font: 500 var(--type-small-size) / 1 var(--font-sans);
  cursor: pointer;
}
.pr-modal__views button.active { border-bottom-color: var(--color-ink); color: var(--color-ink); }
.pr-modal__views button:focus-visible { outline: var(--focus-ring); outline-offset: 2px; }
.pr-modal__body { min-height: 0; overflow: auto; overscroll-behavior: contain; }
.pr-proto-summary { padding: var(--space-5); }
.pr-proto-summary[hidden] { display: none; }
.pr-modal__raw {
  margin: 0;
  padding: var(--space-5);
  min-height: 100%;
  box-sizing: border-box;
  background: var(--color-code-bg);
  color: var(--color-dark-text);
  font: var(--type-code-size) / 22px var(--font-mono);
  white-space: pre;
  tab-size: 2;
}
.pr-modal__raw[hidden] { display: none; }
.pr-modal__actions { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: var(--space-3); padding: var(--space-4) var(--space-5); border-top: var(--hairline); }

/* Summary HTML rendered by app.js (summarizeProtocol). */
.pr-proto-summary .summary-stats { display: grid; gap: var(--space-3); grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); }
.pr-proto-summary .summary-stats > div { display: grid; gap: 2px; padding: var(--space-3) var(--space-4); border: var(--hairline); border-radius: var(--radius-control); min-width: 0; }
.pr-proto-summary .summary-stats span { color: var(--color-ink-muted); font-size: var(--type-caption-size); }
.pr-proto-summary .summary-stats strong { color: var(--color-ink); font-weight: 500; overflow-wrap: anywhere; font-variant-numeric: tabular-nums; }
.pr-proto-summary .summary-subhead { margin: var(--space-5) 0 var(--space-2); color: var(--color-ink); font-size: var(--type-body-size); font-weight: 600; }
.pr-proto-summary .summary-list { display: grid; gap: var(--space-2); margin: 0; padding-left: var(--space-5); list-style: disc; }
.pr-proto-summary .summary-list strong { font-family: var(--font-mono); font-weight: 500; }
.pr-proto-summary .summary-meta { margin-top: var(--space-5); color: var(--color-ink-muted); font-size: var(--type-note-size); }
.pr-proto-summary .sandbox-empty { display: flex; align-items: center; gap: var(--space-3); color: var(--color-ink-secondary); }
.pr-proto-summary .sandbox-empty:not(.error)::before {
  content: "";
  flex: none;
  width: 14px;
  height: 14px;
  border: 2px solid var(--color-border);
  border-top-color: var(--color-ink);
  border-radius: 50%;
  animation: pr-spin 0.8s linear infinite;
}
@keyframes pr-spin { to { transform: rotate(360deg); } }
.pr-proto-summary .sandbox-empty.error { display: block; color: var(--color-ink-secondary); }
.pr-proto-summary .sandbox-empty.error strong { color: var(--color-error-text); }
.pr-proto-summary__detail { display: block; margin-top: var(--space-3); padding: var(--space-2) var(--space-3); border-radius: var(--radius-control); background: var(--color-sunken); color: var(--color-ink-muted); font: var(--type-caption-size) / 18px var(--font-mono); overflow-wrap: anywhere; }

@media (pointer: coarse) {
  .pr-lab__tabs button { min-height: 44px; }
  .pr-modal__close { width: 44px; height: 44px; }
  .pr-modal__views button { min-height: 44px; }
}
@media (max-width: 767.98px) {
  .pr-lab__card { padding: var(--space-5); }
  .pr-modal { padding: 0; align-items: end; }
  .pr-modal__card { width: 100%; max-height: 88vh; max-height: 88dvh; border-radius: var(--radius-card) var(--radius-card) 0 0; padding-bottom: env(safe-area-inset-bottom, 0px); box-shadow: 0 -12px 32px -12px rgba(0, 0, 0, 0.22); }
}
@media (prefers-reduced-motion: reduce) {
  .pr-lab__tabs button { transition: none; }
  .pr-proto-summary .sandbox-empty:not(.error)::before { animation: none; border-top-color: var(--color-ink-muted); }
}

/* Semantic color v3: protocol rails are agent activity (2px blue top bar, blue active tab marker). */
.pr-lab__card { border-top: 2px solid var(--color-agent-solid); }

/* Versions table: the "Updated" line under a protocol with a change in the last 30 days
   (ui/changelog.js reveals it), and the Recent changes block below the table. */
.pr-protocol-versions .pr-changelog-updated { display: block; margin-top: 2px; font-size: var(--type-caption-size); color: var(--color-ink-muted); text-decoration: underline; text-underline-offset: 2px; }
.pr-protocol-versions .pr-changelog-updated[hidden] { display: none; }
.pr-recent-changes { margin-top: var(--space-8); }
.pr-recent-changes__head { display: flex; flex-wrap: wrap; align-items: baseline; justify-content: space-between; gap: var(--space-3); margin-bottom: var(--space-4); }