/* ---------------------------------------------------------------------------
   Visual example gallery — achromatic inspection chrome.

   The rendered example is the only source of colour in this interface. Every
   surface, rule, and label is a warm neutral on cool graphite so the eye
   calibrates on the render and not on the tooling around it.
--------------------------------------------------------------------------- */

:root {
  --bg: #0b0b0d;
  --panel: #0e0e11;
  --panel-raised: #131317;
  --stage: #050506;

  --ink: #edeae3;
  --ink-2: #a5a29c;
  --ink-3: #76736e;
  --ink-4: #55534f;

  --line: rgba(240, 238, 232, 0.085);
  --line-soft: rgba(240, 238, 232, 0.05);
  --line-frame: rgba(240, 238, 232, 0.14);
  --line-strong: rgba(240, 238, 232, 0.28);
  --tint: rgba(240, 238, 232, 0.04);
  --tint-strong: rgba(240, 238, 232, 0.07);
  --danger: #e0705f;

  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, monospace;
  --topbar-height: 58px;
  --catalog-head-height: 38px;
  --status-height: 28px;
  --catalog-width: 292px;
  --ease: cubic-bezier(0.4, 0, 0.2, 1);

  color: var(--ink);
  background: var(--bg);
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
  font-synthesis: none;
  -webkit-font-smoothing: antialiased;
}

* {
  box-sizing: border-box;
}

html,
body {
  width: 100%;
  min-width: 960px;
  height: 100%;
  margin: 0;
  overflow: hidden;
}

body {
  background: var(--bg);
}

button,
input,
select {
  color: inherit;
  font: inherit;
}

button,
a {
  -webkit-tap-highlight-color: transparent;
}

:focus-visible {
  outline: 1px solid var(--line-strong);
  outline-offset: 2px;
}

.app-shell {
  display: grid;
  grid-template-rows: var(--topbar-height) minmax(0, 1fr);
  width: 100%;
  height: 100%;
}

/* --- top bar -------------------------------------------------------------- */

.topbar {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  padding: 0 16px 0 18px;
  background: var(--bg);
}

/* Hairline that resolves into the frame instead of butting into both edges. */
.topbar::after {
  position: absolute;
  right: 0;
  bottom: 0;
  left: 0;
  height: 1px;
  background: linear-gradient(
    90deg,
    transparent,
    var(--line) 4%,
    var(--line) 96%,
    transparent
  );
  content: "";
}

.brand,
.topbar-actions,
.toolbar,
.catalog-heading {
  display: flex;
  align-items: center;
}

.brand {
  gap: 11px;
}

/* The mark's contours only occupy the middle two thirds of its box, so it is
   set larger than the cap height it sits beside. */
.brand-mark {
  flex: none;
  width: 34px;
  height: 34px;
  color: var(--ink);
}

.eyebrow {
  margin: 0 0 3px;
  color: var(--ink-4);
  font-family: var(--mono);
  font-size: 9px;
  font-weight: 500;
  letter-spacing: 0.19em;
  line-height: 1;
  text-transform: uppercase;
}

h1,
h2,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 0;
  font-size: 15px;
  font-weight: 500;
  letter-spacing: -0.012em;
  line-height: 1.1;
}

.topbar-actions {
  gap: 8px;
}

.search {
  display: flex;
  align-items: center;
  gap: 8px;
  width: 320px;
  height: 32px;
  padding: 0 7px 0 11px;
  border: 1px solid var(--line);
  border-radius: 3px;
  background: var(--panel);
  transition:
    border-color 150ms var(--ease),
    background 150ms var(--ease);
}

.search:focus-within {
  border-color: var(--line-strong);
  background: var(--panel-raised);
}

.search:focus-within kbd {
  opacity: 0;
}

.search > span {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
}

.search input {
  flex: 1;
  min-width: 0;
  border: 0;
  outline: 0;
  background: transparent;
  font-size: 12.5px;
  letter-spacing: -0.005em;
}

.search input::placeholder {
  color: var(--ink-4);
}

.search input::-webkit-search-cancel-button {
  display: none;
}

kbd {
  padding: 3px 5px;
  border-radius: 3px;
  color: var(--ink-4);
  background: var(--tint);
  font-family: var(--mono);
  font-size: 9px;
  line-height: 1;
  transition: opacity 120ms var(--ease);
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  min-height: 32px;
  padding: 0 13px 0 11px;
  border: 1px solid var(--line);
  border-radius: 3px;
  color: var(--ink-2);
  background: transparent;
  font-size: 12px;
  font-weight: 500;
  letter-spacing: -0.005em;
  text-decoration: none;
  cursor: pointer;
  transition:
    border-color 150ms var(--ease),
    color 150ms var(--ease),
    background 150ms var(--ease);
}

.button:hover {
  border-color: var(--line-strong);
  color: var(--ink);
  background: var(--tint);
}

.button-icon {
  flex: none;
  width: 15px;
  height: 15px;
  color: var(--ink-3);
  transition: color 150ms var(--ease);
}

.button:hover .button-icon {
  color: var(--ink-2);
}

#refresh.is-refreshing .button-icon {
  color: var(--ink);
  animation: rotate 620ms linear infinite;
}

/* The overview control is a destination, not a toggle: it reads as "current"
   while the grid is on screen — the cells fill instead of the label changing. */
.button-primary {
  color: var(--ink);
}

.button-primary .button-icon rect {
  fill: none;
  transition: fill 160ms var(--ease);
}

.button-primary[aria-current="true"] {
  border-color: var(--line-strong);
  background: var(--tint-strong);
}

.button-primary[aria-current="true"] .button-icon {
  color: var(--ink);
}

.button-primary[aria-current="true"] .button-icon rect {
  fill: currentColor;
}

/* --- layout --------------------------------------------------------------- */

.main-layout {
  display: grid;
  grid-template-columns: var(--catalog-width) minmax(0, 1fr);
  height: 100%;
  min-height: 0;
  overflow: hidden;
}

/* --- catalog -------------------------------------------------------------- */

.catalog {
  display: grid;
  grid-template-rows: var(--catalog-head-height) minmax(0, 1fr);
  min-height: 0;
  overflow: hidden;
  border-right: 1px solid var(--line);
  background: var(--panel);
}

.catalog-heading {
  justify-content: space-between;
  padding: 0 12px;
  border-bottom: 1px solid var(--line-soft);
  color: var(--ink-4);
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

#runtime-summary {
  display: inline-flex;
  align-items: center;
  gap: 7px;
}

#runtime-summary::before {
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--ink-4);
  content: "";
  transition: background 200ms var(--ease);
}

#runtime-summary[data-state="ready"]::before {
  background: var(--ink);
}

#runtime-summary[data-state="loading"]::before {
  background: var(--ink-3);
  animation: pulse 1.4s ease-in-out infinite;
}

#runtime-summary[data-state="error"]::before {
  background: var(--danger);
}

#example-list {
  min-height: 0;
  padding: 0 10px 28px;
  overflow-y: auto;
  overscroll-behavior: contain;
}

.skill-group {
  margin: 0;
}

/* Sticky group headers keep the current skill legible while the list scrolls. */
.skill-group h3 {
  position: sticky;
  top: 0;
  z-index: 1;
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0;
  padding: 17px 2px 8px;
  color: var(--ink-4);
  background: linear-gradient(
    180deg,
    var(--panel) 0 74%,
    rgba(14, 14, 17, 0) 100%
  );
  font-family: var(--mono);
  font-size: 9px;
  font-weight: 500;
  letter-spacing: 0.15em;
  line-height: 1.5;
  text-transform: uppercase;
  transition: color 160ms var(--ease);
}

.skill-group h3::after {
  order: 2;
  flex: 1;
  height: 1px;
  background: var(--line-soft);
  content: "";
}

.skill-group[data-has-current="true"] h3 {
  color: var(--ink-2);
}

.group-count {
  order: 3;
  color: var(--ink-4);
  font-variant-numeric: tabular-nums;
}

.example-link {
  position: relative;
  display: block;
  width: 100%;
  margin: 1px 0;
  padding: 8px 10px 8px 12px;
  border: 0;
  border-radius: 3px;
  color: var(--ink-2);
  background: transparent;
  text-align: left;
  cursor: pointer;
  /* Keeps a keyboard-revealed row clear of the sticky group header. */
  scroll-margin: 42px 0 18px;
  transition:
    color 140ms var(--ease),
    background 140ms var(--ease);
}

/* Selection rail: grows from the row's centre, readable at a glance while
   stepping through examples with j/k. */
.example-link::before {
  position: absolute;
  top: 50%;
  left: 0;
  width: 2px;
  height: 0;
  border-radius: 1px;
  background: var(--ink);
  content: "";
  transform: translateY(-50%);
  transition: height 200ms var(--ease);
}

.example-link:hover {
  color: var(--ink);
  background: var(--tint);
}

.example-link[aria-current="true"] {
  color: var(--ink);
  background: var(--tint-strong);
}

.example-link[aria-current="true"]::before {
  height: calc(100% - 12px);
}

.example-link strong {
  display: block;
  font-size: 12.5px;
  font-weight: 500;
  letter-spacing: -0.008em;
  line-height: 1.35;
}

/* --- inspection ----------------------------------------------------------- */

.inspection {
  position: relative;
  min-width: 0;
  height: 100%;
  min-height: 0;
  overflow: hidden;
  background: var(--stage);
}

.single-view {
  display: grid;
  grid-template-rows: minmax(0, 1fr);
  height: 100%;
  min-height: 0;
}

.toolbar {
  z-index: 2;
  flex-wrap: wrap;
  gap: 6px;
  min-height: 44px;
  padding: 6px 8px;
  border-bottom: 1px solid var(--line);
  background: var(--panel);
}

.toolbar label {
  display: flex;
  align-items: center;
  gap: 7px;
  padding-left: 8px;
  color: var(--ink-4);
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.toolbar select {
  height: 30px;
  padding: 0 24px 0 8px;
  border: 1px solid var(--line);
  border-radius: 3px;
  outline: 0;
  color: var(--ink-2);
  background: var(--panel-raised);
  font-family: inherit;
  font-size: 11.5px;
  letter-spacing: 0;
  text-transform: none;
}

.toolbar .button {
  min-height: 30px;
  padding: 0 11px;
  font-size: 11.5px;
}

.stage-shell {
  display: grid;
  grid-template-rows: minmax(0, 1fr) var(--status-height);
  min-width: 0;
  min-height: 0;
  overflow: hidden;
  background: var(--stage);
}

.stage {
  display: grid;
  place-items: center;
  min-width: 0;
  min-height: 0;
  overflow: hidden;
}

.stage iframe {
  display: block;
  width: 100%;
  height: 100%;
  border: 0;
  background: #000;
}

/* A fixed viewport reads as a plate on an easel; a responsive one runs edge to
   edge with no rule doubling the surrounding frame. */
.stage[data-fit="fixed"] iframe {
  box-shadow: 0 0 0 1px var(--line);
}

.stage-status {
  display: flex;
  align-items: center;
  padding: 0 12px;
  border-top: 1px solid var(--line);
  color: var(--ink-4);
  background: var(--panel);
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.11em;
  text-transform: uppercase;
}

.stage-status > span:not(:empty) ~ span:not(:empty) {
  margin-left: 14px;
  padding-left: 14px;
  border-left: 1px solid var(--line-soft);
}

#frame-status {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  color: var(--ink-3);
}

#frame-status::before {
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--ink-4);
  content: "";
}

#frame-status[data-state="loading"]::before {
  background: var(--ink-3);
  animation: pulse 1.4s ease-in-out infinite;
}

#frame-status[data-state="ready"]::before {
  background: var(--ink);
}

#frame-status[data-state="ready"] {
  color: var(--ink-2);
}

#frame-status[data-state="error"] {
  color: var(--danger);
  letter-spacing: 0.06em;
  text-transform: none;
}

#frame-status[data-state="error"]::before {
  background: var(--danger);
}

#frame-metrics {
  color: var(--ink-3);
  font-variant-numeric: tabular-nums;
}

/* --- overview ------------------------------------------------------------- */

.overview {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(400px, 1fr));
  align-content: start;
  gap: 22px 16px;
  width: 100%;
  height: 100%;
  min-height: 0;
  padding: 18px 18px 32px;
  overflow-y: auto;
  background: var(--bg);
}

.overview-card {
  display: grid;
  grid-template-rows: auto auto;
  content-visibility: auto;
  contain-intrinsic-size: auto 320px;
  border: 0;
  color: inherit;
  background: transparent;
  cursor: pointer;
  outline: 0;
}

.overview-thumbnail-shell {
  position: relative;
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  /* A defined edge: dark renders must not bleed into the page. */
  border: 1px solid var(--line-frame);
  border-radius: 2px;
  background: var(--stage);
  transition:
    border-color 180ms var(--ease),
    box-shadow 180ms var(--ease);
}

.overview-card:hover .overview-thumbnail-shell,
.overview-card:focus-visible .overview-thumbnail-shell {
  border-color: var(--line-strong);
}

.overview-card:focus-visible .overview-thumbnail-shell {
  box-shadow: 0 0 0 1px var(--line-strong);
}

.overview-card[data-active="true"] .overview-thumbnail-shell {
  border-color: var(--line-strong);
}

.overview-thumbnail-shell::before {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  padding: 16px;
  color: var(--ink-4);
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.12em;
  text-align: center;
  text-transform: uppercase;
  content: attr(data-message);
}

/* Indeterminate progress reads as a light sweep, not a spinner. */
.overview-thumbnail-shell[data-state="loading"]::after {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 34%;
  height: 1px;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(240, 238, 232, 0.45),
    transparent
  );
  content: "";
  animation: sweep 1.8s var(--ease) infinite;
}

.overview-thumbnail-shell[data-state="ready"]::before {
  content: "";
}

.overview-thumbnail-shell[data-state="error"]::before {
  color: var(--danger);
  letter-spacing: 0.04em;
  text-transform: none;
}

.overview-thumbnail {
  position: relative;
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0;
  transition: opacity 220ms var(--ease);
  pointer-events: none;
}

.overview-thumbnail-shell[data-state="ready"] .overview-thumbnail {
  opacity: 1;
}

.overview-card footer {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 20px;
  padding: 10px 2px 0;
}

.overview-card strong {
  display: block;
  color: var(--ink-2);
  font-size: 12.5px;
  font-weight: 500;
  letter-spacing: -0.008em;
  transition: color 160ms var(--ease);
}

.overview-card:hover strong,
.overview-card:focus-visible strong,
.overview-card[data-active="true"] strong {
  color: var(--ink);
}

.overview-card .inspect-label {
  flex: none;
  color: var(--ink-4);
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  transition: color 160ms var(--ease);
}

.overview-card:hover .inspect-label,
.overview-card:focus-visible .inspect-label {
  color: var(--ink-2);
}

/* --- empty state ---------------------------------------------------------- */

.empty-state {
  display: grid;
  place-items: center;
  align-content: center;
  width: 100%;
  height: 100%;
  padding: 40px;
  background: var(--bg);
  text-align: center;
}

.empty-state h2 {
  max-width: 620px;
  margin-bottom: 12px;
  font-size: 22px;
  font-weight: 450;
  letter-spacing: -0.025em;
  line-height: 1.35;
}

.empty-state > p:last-child {
  max-width: 520px;
  color: var(--ink-3);
  font-size: 13px;
  line-height: 1.65;
}

.empty-state code {
  color: var(--ink-2);
  font-family: var(--mono);
  font-size: 0.92em;
}

.empty-orbit {
  position: relative;
  width: 78px;
  height: 58px;
  margin-bottom: 26px;
  border: 1px solid var(--line);
  border-radius: 2px;
}

.empty-orbit::before {
  position: absolute;
  inset: 9px;
  border: 1px dashed var(--line);
  content: "";
}

.empty-orbit span {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 6px;
  height: 6px;
  border-radius: 1px;
  background: var(--ink-3);
  transform: translate(-50%, -50%);
}

/* --- scrollbars ----------------------------------------------------------- */

#example-list,
.overview {
  scrollbar-width: thin;
  scrollbar-color: rgba(240, 238, 232, 0.13) transparent;
}

#example-list::-webkit-scrollbar,
.overview::-webkit-scrollbar {
  width: 10px;
}

#example-list::-webkit-scrollbar-track,
.overview::-webkit-scrollbar-track {
  background: transparent;
}

#example-list::-webkit-scrollbar-thumb,
.overview::-webkit-scrollbar-thumb {
  border: 3px solid transparent;
  border-radius: 999px;
  background: rgba(240, 238, 232, 0.13);
  background-clip: padding-box;
}

#example-list::-webkit-scrollbar-thumb:hover,
.overview::-webkit-scrollbar-thumb:hover {
  background: rgba(240, 238, 232, 0.26);
  background-clip: padding-box;
}

/* --- motion --------------------------------------------------------------- */

@keyframes pulse {
  0%,
  100% {
    opacity: 1;
  }
  50% {
    opacity: 0.28;
  }
}

@keyframes rotate {
  to {
    transform: rotate(360deg);
  }
}

@keyframes sweep {
  0% {
    transform: translateX(-110%);
  }
  100% {
    transform: translateX(400%);
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

[hidden] {
  display: none !important;
}

@media (max-width: 1180px) {
  :root {
    --catalog-width: 244px;
  }

  .search {
    width: 220px;
  }

  .overview {
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  }
}