@import url("./tokens.css");

/* ─────────────────────────────────────────────────────────────
   Reset & base
   ───────────────────────────────────────────────────────────── */

*, *::before, *::after { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  font-feature-settings: "ss01", "cv11";
}

html { scroll-behavior: smooth; }

body {
  /* Cool spotlight behind the hero. Single source of light. */
  background:
    radial-gradient(1200px 600px at 50% -120px,
                    rgba(49, 120, 198, 0.14) 0%,
                    rgba(49, 120, 198, 0)   60%),
    radial-gradient(900px 500px at 85% 10%,
                    rgba(255, 255, 255, 0.04) 0%,
                    transparent 60%),
    var(--bg);
  min-height: 100dvh;
  overflow-x: hidden;
}

/* Subtle film-grain overlay so flat surfaces don't feel sterile. */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 1;
  opacity: 0.035;
  mix-blend-mode: overlay;
  background-image:
    url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='160' height='160'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/></filter><rect width='100%25' height='100%25' filter='url(%23n)' opacity='0.6'/></svg>");
}

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--dur) var(--ease);
}
a:hover { color: var(--accent); }

::selection {
  background: var(--accent-soft);
  color: var(--fg);
}

/* Visible focus for keyboard users only */
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

/* Skip-to-content for keyboard navigation */
.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--accent);
  color: #fff;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  z-index: 100;
}
.skip-link:focus { left: 16px; top: 16px; }

/* ─────────────────────────────────────────────────────────────
   Layout primitives
   ───────────────────────────────────────────────────────────── */

.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding-inline: var(--gutter);
  position: relative;
  z-index: 2;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--fg-muted);
}
.eyebrow .dot {
  width: 6px;
  height: 6px;
  background: var(--accent);
  box-shadow: 0 0 12px var(--accent-line);
}

/* ─────────────────────────────────────────────────────────────
   Top navigation
   ───────────────────────────────────────────────────────────── */

.nav {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: saturate(140%) blur(14px);
  -webkit-backdrop-filter: saturate(140%) blur(14px);
  background: linear-gradient(to bottom,
              rgba(11, 11, 12, 0.78) 0%,
              rgba(11, 11, 12, 0.55) 100%);
  border-bottom: 1px solid var(--line);
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--fg);
}
.brand:hover { color: var(--fg); }

.brand__mark {
  width: 28px;
  height: 28px;
  display: grid;
  place-items: center;
  border-radius: var(--radius-sm);
  background: linear-gradient(160deg, #1c2230 0%, #11141a 100%);
  border: 1px solid var(--line-strong);
  color: var(--accent-fg);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.04);
}
.brand__mark svg {
  display: block;
  width: 16px;
  height: 16px;
}

.brand__name {
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--fg);
  white-space: nowrap;
}
.brand__name .dim { color: var(--fg-subtle); }

.nav__links {
  display: none;
  align-items: center;
  gap: 6px;
}
@media (min-width: 760px) {
  .nav__links { display: inline-flex; }
}

.nav__link {
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  color: var(--fg-muted);
}
.nav__link:hover {
  color: var(--fg);
  background: var(--bg-elev-1);
}

.nav__cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--line-strong);
  background: var(--bg-elev-1);
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--fg);
  transition: background var(--dur) var(--ease),
              border-color var(--dur) var(--ease),
              transform var(--dur) var(--ease);
}
.nav__cta:hover {
  background: var(--bg-elev-2);
  border-color: var(--line-accent);
  color: var(--fg);
}
.nav__cta:active { transform: translateY(1px); }
.nav__cta svg { width: 14px; height: 14px; }
.nav__cta .stars {
  color: var(--accent);
  font-variant-numeric: tabular-nums;
}

/* ─────────────────────────────────────────────────────────────
   Hero
   ───────────────────────────────────────────────────────────── */

.hero {
  padding: clamp(56px, 9vw, 110px) 0 clamp(40px, 6vw, 72px);
  position: relative;
}

.hero__pill {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 6px 12px 6px 8px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--line-strong);
  background: var(--bg-elev-1);
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--fg-muted);
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}
.hero__pill .badge {
  display: inline-flex;
  align-items: center;
  padding: 2px 8px;
  border-radius: var(--radius-xs);
  background: var(--accent-soft);
  color: var(--accent-fg);
  font-weight: 600;
  letter-spacing: 0.02em;
}
.hero__pill .sep { color: var(--fg-subtle); }

.hero__title {
  margin: 22px 0 18px;
  font-size: clamp(40px, 6.4vw, 76px);
  line-height: 1.02;
  letter-spacing: -0.035em;
  font-weight: 600;
  color: var(--fg);
  max-width: 14ch;
  text-wrap: balance;
}
.hero__title .em {
  font-style: normal;
  color: var(--accent-fg);
}

.hero__lede {
  margin: 0 0 32px;
  max-width: 58ch;
  font-size: clamp(16px, 1.4vw, 19px);
  line-height: 1.55;
  color: var(--fg-muted);
  text-wrap: pretty;
}
.hero__lede strong {
  color: var(--fg);
  font-weight: 500;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 28px;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  height: 42px;
  padding: 0 18px;
  border-radius: var(--radius-md);
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  border: 1px solid transparent;
  transition: background var(--dur) var(--ease),
              color var(--dur) var(--ease),
              border-color var(--dur) var(--ease),
              transform var(--dur-fast) var(--ease);
  white-space: nowrap;
}
.btn:active { transform: translateY(1px); }

.btn--primary {
  background: var(--accent);
  color: #ffffff;
  border-color: var(--accent);
  box-shadow:
    0 1px 0 rgba(255, 255, 255, 0.18) inset,
    0 10px 24px -12px rgba(49, 120, 198, 0.65);
}
.btn--primary:hover {
  background: var(--accent-bright);
  color: #ffffff;
  border-color: var(--accent-bright);
}

.btn--ghost {
  background: transparent;
  color: var(--fg);
  border-color: var(--line-strong);
}
.btn--ghost:hover {
  background: var(--bg-elev-1);
  border-color: var(--line-accent);
  color: var(--fg);
}

.btn .arrow {
  width: 14px; height: 14px;
  transition: transform var(--dur) var(--ease);
}
.btn:hover .arrow { transform: translateX(3px); }

.hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 22px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--fg-subtle);
}
.hero__meta .ok { color: var(--ok); }

/* ─────────────────────────────────────────────────────────────
   Showcase: code preview + key points (asymmetric)
   ───────────────────────────────────────────────────────────── */

.showcase {
  padding-bottom: clamp(60px, 8vw, 96px);
}

.showcase__grid {
  display: grid;
  gap: 24px;
  grid-template-columns: 1fr;
}
@media (min-width: 980px) {
  .showcase__grid {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
    gap: 32px;
    align-items: stretch;
  }
}

/* Window-chrome wrapper around the code element */
.window {
  position: relative;
  border-radius: var(--radius-lg);
  border: 1px solid var(--line-strong);
  background: linear-gradient(180deg, #131720 0%, #0c0f15 100%);
  overflow: hidden;
  box-shadow:
    0 1px 0 rgba(255, 255, 255, 0.04) inset,
    0 30px 60px -30px rgba(0, 0, 0, 0.55);
}
.window__bar {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  border-bottom: 1px solid var(--line);
  background: linear-gradient(180deg, #181d27 0%, #11141a 100%);
}
.window__dots {
  display: inline-flex;
  gap: 6px;
}
.window__dots span {
  width: 9px;
  height: 9px;
  border-radius: var(--radius-xs);
  background: #2c313b;
  border: 1px solid rgba(255, 255, 255, 0.04);
}
.window__dots span:nth-child(1) { background: #3a4150; }
.window__dots span:nth-child(2) { background: #2e3540; }
.window__dots span:nth-child(3) { background: #232932; }

.window__title {
  margin-left: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--fg-subtle);
}
.window__title .accent { color: var(--accent-fg); }

.window__body {
  background: #0b0e14;
}

/* Side panel: install + checks + CTA */
.side-card {
  display: flex;
  flex-direction: column;
  border-radius: var(--radius-lg);
  border: 1px solid var(--line-strong);
  background:
    radial-gradient(180px 120px at 100% 0%,
                    rgba(49, 120, 198, 0.14) 0%,
                    transparent 70%),
    linear-gradient(180deg, #131720 0%, #0c0f15 100%);
  overflow: hidden;
}

.side-card__head {
  padding: 22px 22px 6px;
}
.side-card__kicker {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent-fg);
}
.side-card__title {
  margin: 6px 0 0;
  font-size: 22px;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--fg);
}
.side-card__sub {
  margin: 10px 0 16px;
  color: var(--fg-muted);
  font-size: 13.5px;
  line-height: 1.55;
  text-wrap: pretty;
}
.side-card__sub em {
  font-style: normal;
  color: var(--fg);
}
.side-card__sub code {
  padding: 1px 6px;
  border: 1px solid var(--line);
  border-radius: var(--radius-xs);
  background: rgba(255, 255, 255, 0.025);
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--accent-fg);
}

/* Checklist */
.checks {
  list-style: none;
  margin: 0;
  padding: 18px 22px 6px;
  display: grid;
  gap: 12px;
}
.checks li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 14px;
  color: var(--fg-muted);
}
.checks li strong {
  color: var(--fg);
  font-weight: 500;
}
.checks .check {
  flex: 0 0 auto;
  width: 18px;
  height: 18px;
  margin-top: 2px;
  border-radius: var(--radius-xs);
  background: var(--accent-soft);
  color: var(--accent-fg);
  display: grid;
  place-items: center;
}
.checks .check svg { width: 11px; height: 11px; }

.side-card__foot {
  margin-top: auto;
  padding: 18px 22px 22px;
  border-top: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.015);
}
.side-card__foot a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--fg);
}
.side-card__foot a .arrow { transition: transform var(--dur) var(--ease); }
.side-card__foot a:hover .arrow { transform: translateX(3px); }

/* ─────────────────────────────────────────────────────────────
   Live demos
   Two playgrounds (counter, todo dashboard) hosted alongside
   real <cts-event-log> panels so visitors can watch the events
   the components emit in real time.
   ───────────────────────────────────────────────────────────── */

.live {
  padding: clamp(60px, 8vw, 96px) 0 clamp(40px, 6vw, 72px);
  border-top: 1px solid var(--line);
  position: relative;
}

.live__head {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 28px;
  flex-wrap: wrap;
  margin-bottom: 36px;
}
.live__title {
  margin: 12px 0 0;
  font-size: clamp(28px, 3.4vw, 38px);
  font-weight: 600;
  letter-spacing: -0.02em;
  max-width: 22ch;
  text-wrap: balance;
}
.live__lede {
  max-width: 50ch;
  color: var(--fg-muted);
  font-size: 15px;
  text-wrap: pretty;
  margin: 0;
}
.live__lede code {
  padding: 1px 6px;
  border: 1px solid var(--line);
  border-radius: var(--radius-xs);
  background: rgba(255, 255, 255, 0.025);
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--accent-fg);
}

/* Keep inline code chips like `npm install` or `@State()` atomic so
   prose wraps around them instead of breaking them mid-token. */
:where(.hero__lede, .live__lede, .side-card__sub, .playground__title,
       .playground__sub, .stage__caption, .api__lede) code {
  white-space: nowrap;
}

.playground {
  position: relative;
  margin-top: 22px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--line-strong);
  background:
    radial-gradient(160px 110px at 100% 0%,
                    rgba(49, 120, 198, 0.10) 0%,
                    transparent 70%),
    linear-gradient(180deg, #131720 0%, #0c0f15 100%);
  overflow: hidden;
  box-shadow:
    0 1px 0 rgba(255, 255, 255, 0.04) inset,
    0 30px 60px -30px rgba(0, 0, 0, 0.55);
}

.playground__head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 18px;
  padding: 22px 24px 18px;
  border-bottom: 1px solid var(--line);
}
.playground__head > div {
  min-width: 0;
}
.playground__kicker {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent-fg);
}
.playground__title {
  margin: 8px 0 0;
  font-size: 20px;
  font-weight: 600;
  letter-spacing: -0.015em;
  color: var(--fg);
  text-wrap: balance;
}
.playground__title code {
  padding: 1px 6px;
  border: 1px solid var(--line);
  border-radius: var(--radius-xs);
  background: rgba(255, 255, 255, 0.025);
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 500;
  color: var(--accent-fg);
}
.playground__sub {
  margin: 10px 0 0;
  max-width: 60ch;
  color: var(--fg-muted);
  font-size: 14px;
  line-height: 1.6;
  text-wrap: pretty;
}
.playground__sub code {
  padding: 1px 5px;
  border: 1px solid var(--line);
  border-radius: var(--radius-xs);
  background: rgba(255, 255, 255, 0.025);
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--accent-fg);
}
/* Playground header actions. */
.playground__actions {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.playground__btn {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-xs);
  background: rgba(255, 255, 255, 0.02);
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--fg-muted);
  white-space: nowrap;
  cursor: pointer;
  text-decoration: none;
  transition: border-color var(--dur) var(--ease),
              color var(--dur) var(--ease),
              background var(--dur) var(--ease);
}
.playground__btn:hover {
  color: var(--fg);
  border-color: var(--line-accent);
  background: var(--accent-soft);
}
.playground__btn:active {
  transform: translateY(1px);
}
.playground__btn[aria-expanded="true"],
.playground__btn.is-active {
  color: var(--accent-fg);
  border-color: var(--line-accent);
  background: var(--accent-soft);
}

.playground__btn-caret {
  margin-left: 2px;
  opacity: 0.6;
  transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease);
}
.playground__btn[aria-expanded="true"] .playground__btn-caret {
  transform: rotate(180deg);
  opacity: 0.9;
}

.playground__btn--ghost {
  background: transparent;
}
.playground__btn--ghost:hover {
  background: var(--bg-elev-2);
}

/* Backwards compatibility for the original source link class. */
.playground__source {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-xs);
  background: rgba(255, 255, 255, 0.02);
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--fg-muted);
  white-space: nowrap;
  transition: border-color var(--dur) var(--ease),
              color var(--dur) var(--ease),
              background var(--dur) var(--ease);
}
.playground__source:hover {
  color: var(--fg);
  border-color: var(--line-accent);
  background: var(--accent-soft);
}

.playground__body {
  display: grid;
  gap: 20px;
  padding: 26px 24px 28px;
}

/* Counter playground: stage on the left, log on the right at >=900px. */
.playground__body--split {
  grid-template-columns: 1fr;
}
@media (min-width: 900px) {
  .playground__body--split {
    grid-template-columns: minmax(0, 1fr) minmax(280px, 360px);
    align-items: stretch;
  }
}

/* Todo needs a wider breakpoint than the counter card. */
.playground--todo .playground__body--split {
  grid-template-columns: 1fr;
}
@media (min-width: 1024px) {
  .playground--todo .playground__body--split {
    grid-template-columns: minmax(0, 1fr) minmax(280px, 360px);
    align-items: stretch;
  }
}

/* Legacy stack variant for external embeds. */
.playground__body--stack {
  grid-template-columns: 1fr;
}

.stage {
  display: grid;
  place-items: center;
  gap: 18px;
  padding: 28px 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background:
    radial-gradient(60% 60% at 50% 0%,
                    rgba(49, 120, 198, 0.05) 0%,
                    transparent 60%),
    rgba(0, 0, 0, 0.18);
  background-image:
    linear-gradient(to right, rgba(255, 255, 255, 0.022) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255, 255, 255, 0.022) 1px, transparent 1px),
    radial-gradient(60% 60% at 50% 0%,
                    rgba(49, 120, 198, 0.05) 0%,
                    transparent 60%),
    linear-gradient(180deg, #0d1118 0%, #0a0d13 100%);
  background-size: 28px 28px, 28px 28px, auto, auto;
  min-height: 240px;
}

.stage--counter {
  grid-template-rows: auto auto;
}

.stage--todo {
  padding: 32px 18px;
}
/* Prevent host min-content overflow on narrow phones. */
.stage--todo cts-todo-dashboard {
  width: min(540px, 100%);
  min-width: 0;
}

.stage__caption {
  margin: 0;
  max-width: 38ch;
  color: var(--fg-subtle);
  font-size: 12.5px;
  line-height: 1.55;
  text-align: center;
  text-wrap: balance;
}
.stage__caption code {
  padding: 1px 5px;
  border: 1px solid var(--line);
  border-radius: var(--radius-xs);
  background: rgba(255, 255, 255, 0.02);
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: var(--accent-fg);
}

.playground__log {
  display: flex; /* lets the host stretch in grid contexts */
}
.playground__log--wide {
  /* Sits below the dashboard; let it span the full row. */
  width: 100%;
}

/* Do not set display here; the host grid drives the open/close animation. */
cts-source-viewer:not(:defined) {
  /* Keep the collapsed state during hydration. */
  display: block;
  height: 0;
  overflow: hidden;
}

/* Loading skeletons for live demos. */
cts-counter,
cts-todo-dashboard,
cts-event-log {
  display: block;
}

cts-counter:not(:defined) {
  width: 320px;
  height: 230px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-lg);
  background: linear-gradient(180deg, #11141a 0%, #0f131b 100%);
}

cts-todo-dashboard:not(:defined) {
  /* Match the compact hydrated width. */
  width: min(540px, calc(100vw - 80px));
  height: 520px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-lg);
  background: linear-gradient(180deg, #11141a 0%, #0f131b 100%);
}

cts-event-log:not(:defined) {
  min-height: 240px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-md);
  background: linear-gradient(180deg, #11141a 0%, #0f131b 100%);
}

cts-counter:defined,
cts-todo-dashboard:defined,
cts-event-log:defined {
  animation: cts-hydrate 280ms var(--ease) both;
}

/* ─────────────────────────────────────────────────────────────
   Decorators / API at-a-glance
   ───────────────────────────────────────────────────────────── */

.api {
  padding: clamp(60px, 8vw, 96px) 0;
  border-top: 1px solid var(--line);
  position: relative;
}

.api__head {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 28px;
  flex-wrap: wrap;
  margin-bottom: 36px;
}
.api__title {
  margin: 12px 0 0;
  font-size: clamp(28px, 3.4vw, 38px);
  font-weight: 600;
  letter-spacing: -0.02em;
  max-width: 18ch;
  text-wrap: balance;
}
.api__lede {
  max-width: 44ch;
  color: var(--fg-muted);
  font-size: 15px;
  text-wrap: pretty;
  margin: 0;
}

.api__grid {
  display: grid;
  gap: 14px;
  grid-template-columns: 1fr;
}
@media (min-width: 640px) {
  .api__grid { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 980px) {
  .api__grid { grid-template-columns: repeat(3, 1fr); }
}

.api-card {
  position: relative;
  padding: 22px;
  border-radius: var(--radius-md);
  border: 1px solid var(--line);
  background: var(--bg-elev-1);
  transition: border-color var(--dur) var(--ease),
              background var(--dur) var(--ease),
              transform var(--dur) var(--ease);
}
.api-card:hover {
  border-color: var(--line-accent);
  background: var(--bg-elev-2);
  transform: translateY(-2px);
}
.api-card__name {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--accent-fg);
}
.api-card__name .target {
  margin-left: 8px;
  padding: 2px 8px;
  border-radius: var(--radius-xs);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--line);
  color: var(--fg-subtle);
  font-size: 11px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
.api-card__desc {
  margin: 10px 0 0;
  font-size: 14px;
  color: var(--fg-muted);
  line-height: 1.55;
}

/* ─────────────────────────────────────────────────────────────
   Footer
   ───────────────────────────────────────────────────────────── */

.footer {
  border-top: 1px solid var(--line);
  padding: 28px 0 36px;
}
.footer__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--fg-subtle);
}
.footer a { color: var(--fg-muted); }
.footer a:hover { color: var(--accent); }
.footer__links {
  display: inline-flex;
  gap: 18px;
  flex-wrap: wrap;
}

/* ─────────────────────────────────────────────────────────────
   Loading skeletons
   Shown until the JS bundle hydrates the custom elements.
   :not(:defined) matches a custom element *before* it has been
   registered via customElements.define() — so the skeleton state
   evaporates the instant the bundle finishes executing.
   ───────────────────────────────────────────────────────────── */

cts-code-example,
cts-message {
  display: block;
}

cts-code-example:not(:defined),
cts-message:not(:defined) {
  position: relative;
  overflow: hidden;
}

/* Shared shimmer sweep — sits on top of the skeleton geometry */
cts-code-example:not(:defined)::after,
cts-message:not(:defined)::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: linear-gradient(
    100deg,
    transparent 0%,
    rgba(255, 255, 255, 0.045) 50%,
    transparent 100%
  );
  background-size: 220% 100%;
  background-repeat: no-repeat;
  animation: cts-shimmer 1.5s ease-in-out infinite;
  pointer-events: none;
}

/* Code skeleton lines via stacked gradients. */
cts-code-example:not(:defined) {
  --skel: rgba(255, 255, 255, 0.06);
  min-height: 380px;
  padding: 28px 32px;
  background-color: transparent;
  background-origin: content-box;
  background-repeat: no-repeat;
  background-image:
    linear-gradient(var(--skel), var(--skel)),
    linear-gradient(var(--skel), var(--skel)),
    linear-gradient(var(--skel), var(--skel)),
    linear-gradient(var(--skel), var(--skel)),
    linear-gradient(var(--skel), var(--skel)),
    linear-gradient(var(--skel), var(--skel)),
    linear-gradient(var(--skel), var(--skel)),
    linear-gradient(var(--skel), var(--skel)),
    linear-gradient(var(--skel), var(--skel));
  background-size:
    36% 9px,
    72% 9px,
    62% 9px,
    78% 9px,
    50% 9px,
    56% 9px,
    74% 9px,
    44% 9px,
    66% 9px;
  background-position:
    0   0,
    0  28px,
    0  56px,
    0 100px,   /* visual gap (blank "line") */
    0 128px,
    0 156px,
    0 200px,   /* visual gap */
    0 228px,
    0 256px;
}

@media (min-width: 980px) {
  cts-code-example:not(:defined) { min-height: 480px; }
}

/* Install row: single shimmering bar matching the real row's box */
cts-message:not(:defined) {
  height: 46px;
  margin: 18px 22px 6px;
  background: rgba(255, 255, 255, 0.025);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-md);
}

@keyframes cts-shimmer {
  0%   { background-position: 110% 0; }
  100% { background-position: -110% 0; }
}

/* Fade in once custom elements are defined. */
cts-code-example:defined,
cts-message:defined {
  animation: cts-hydrate 280ms var(--ease) both;
}

@keyframes cts-hydrate {
  from { opacity: 0; }
  to   { opacity: 1; }
}

/* Mobile / narrow-viewport adjustments */
@media (max-width: 720px) {
  .playground__head {
    flex-direction: column;
    align-items: stretch;
    gap: 14px;
    padding: 20px 18px 16px;
  }
  .playground__actions {
    justify-content: flex-start;
    flex-wrap: wrap;
  }
  .playground__title {
    font-size: 19px;
  }
  .playground__sub {
    font-size: 13.5px;
  }

  .playground__body {
    padding: 18px 16px 22px;
    gap: 18px;
  }

  .stage {
    padding: 22px 14px;
    min-height: 200px;
  }
  .stage--todo {
    padding: 22px 10px;
  }

  cts-code-example {
    font-size: 12px;
  }
}

/* ─────────────────────────────────────────────────────────────
   Reduced motion
   ───────────────────────────────────────────────────────────── */

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation: none !important;
    transition: none !important;
    scroll-behavior: auto !important;
  }
}