/* ==========================================================================
   PLAYGROUND — live code pens
   Loads after stylesheet.css and reuses its tokens.

   The subject here is code that runs, so the code and its output are the
   design: cards lead with a live frame rather than a screenshot, and the
   editor is a hard split — mono on the deepest surface, result on the page
   ground. That split is the one bold move; everything around it stays flat.
   ========================================================================== */

/* ---------- Grid ---------- */
.pen-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 24px;
  padding-bottom: clamp(56px, 9vh, 104px);
  list-style: none;
  margin: 0;
}
.pen-grid li.is-hidden { display: none; }

.pen-card {
  display: flex;
  flex-direction: column;
  height: 100%;
  border: 1px solid var(--ghost);
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.03);
  overflow: hidden;
  transition: border-color 0.4s var(--ease), transform 0.5s var(--ease), box-shadow 0.5s var(--ease);
}
.pen-card:hover { border-color: rgba(255, 195, 41, 0.35); transform: translateY(-4px); box-shadow: var(--glow); }
.pen-card:focus-within { border-color: var(--periwinkle); }

/* The live frame. Fixed aspect so the grid stays even whatever the pen does. */
.pen-stage {
  position: relative;
  aspect-ratio: 16 / 10;
  background: var(--surface-lowest);
  border-bottom: 1px solid var(--ghost);
  overflow: hidden;
}
/* The frame lays out at a full desktop size and is then scaled down, so a
   card shows a true miniature of the pen rather than a squashed mobile
   version of it. --fit is set per card in playground.js. */
.pen-frame {
  position: absolute;
  top: 0; left: 0;
  width: 900px;
  height: 563px;
  border: 0;
  display: block;
  background: transparent;
  transform-origin: 0 0;
  transform: scale(var(--fit, 0.38));
}
/* Placeholder until the pen is built — and the permanent state under
   reduced motion, where nothing runs until it's asked to. */
.pen-idle {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  gap: 12px;
  align-content: center;
  background: var(--surface-lowest);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--outline);
  cursor: pointer;
  transition: opacity 0.4s var(--ease), color 0.3s;
}
.pen-idle:hover { color: var(--amber); }
.pen-idle::before {
  content: "";
  width: 34px; height: 34px;
  border-radius: 50%;
  border: 1px solid currentColor;
  background: radial-gradient(circle at 50% 50%, currentColor 0 3px, transparent 3px);
  transition: transform 0.5s var(--ease-orbit);
}
.pen-idle:hover::before { transform: scale(1.12); }
.pen-stage.is-live .pen-idle { opacity: 0; pointer-events: none; }

.pen-body { display: flex; flex-direction: column; gap: 10px; padding: 20px 22px 6px; flex: 1; }
.pen-card h3 { font-family: var(--font-display); font-weight: 600; font-size: 1.15rem; letter-spacing: -0.02em; }
.pen-card p { font-size: 14.5px; color: var(--on-surface-dim); }
.pen-meta { display: flex; flex-wrap: wrap; gap: 7px; margin-top: auto; padding-top: 6px; }
.pen-tag {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--outline);
  border: 1px solid var(--ghost);
  border-radius: var(--radius-pill);
  padding: 4px 10px;
}

.pen-actions { display: flex; flex-wrap: wrap; gap: 9px; padding: 16px 22px 20px; }
.pen-btn {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 9px 16px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--ghost);
  background: none;
  color: var(--on-surface-dim);
  cursor: pointer;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: background 0.3s var(--ease), color 0.3s, border-color 0.3s, transform 0.3s var(--ease);
}
.pen-btn:hover { color: var(--surface); background: var(--on-surface); border-color: var(--on-surface); }
.pen-btn:active { transform: scale(0.97); }
.pen-btn:focus-visible { outline: 3px solid var(--periwinkle); outline-offset: 3px; }
.pen-btn--go { border-color: rgba(255, 195, 41, 0.45); color: var(--amber); }
.pen-btn--go:hover { background: var(--amber); border-color: var(--amber); color: var(--surface); }

/* ---------- Handing the pointer over to a pen ------------------------------
   The site hides the real cursor and draws its own, but mousemove doesn't
   cross into a sandboxed iframe — the custom dot would freeze at the edge
   while the real pointer stayed hidden, leaving nothing visible inside a
   pen. So frames get the real cursor back and the custom one steps aside.
   Matters most for Goo pointer, which is entirely about pointer position. */
.has-cursor .pen-frame,
.has-cursor .editor-frame { cursor: auto; }
body.pen-hover .cursor-dot,
body.pen-hover .cursor-ring { opacity: 0; }

/* ---------- Filter row (shares the blog's chips if both stylesheets load,
     but defined here so the playground stands alone) ---------- */
.pen-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  padding-bottom: clamp(18px, 3vh, 30px);
}

/* ==========================================================================
   EDITOR — full-screen split
   ========================================================================== */
body.pen-open { overflow: hidden; }

.editor {
  position: fixed;
  inset: 0;
  z-index: 170;
  display: flex;
  flex-direction: column;
  background: var(--surface);
  visibility: hidden;
  opacity: 0;
  transition: opacity 0.35s var(--ease), visibility 0s linear 0.35s;
}
.editor.is-open { visibility: visible; opacity: 1; transition: opacity 0.35s var(--ease), visibility 0s; }

.editor-bar {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px var(--gutter);
  border-bottom: 1px solid var(--ghost);
  background: var(--surface-lowest);
  flex: none;
}
.editor-name {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1rem;
  letter-spacing: -0.01em;
}
.editor-note {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--outline);
}
.editor-actions { display: flex; gap: 9px; margin-left: auto; }

.editor-split {
  flex: 1;
  display: grid;
  grid-template-columns: minmax(320px, 42%) 1fr;
  min-height: 0;
}

/* Code side */
.editor-code {
  display: flex;
  flex-direction: column;
  min-width: 0;
  min-height: 0;
  background: var(--surface-lowest);
  border-right: 1px solid var(--ghost);
}
.code-tabs { display: flex; gap: 2px; padding: 10px 14px 0; flex: none; }
.code-tab {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  padding: 10px 16px;
  border: 0;
  border-bottom: 2px solid transparent;
  background: none;
  color: var(--outline);
  cursor: pointer;
  transition: color 0.3s, border-color 0.3s;
}
.code-tab:hover { color: var(--on-surface); }
.code-tab[aria-selected="true"] { color: var(--amber); border-bottom-color: var(--amber); }
.code-tab:focus-visible { outline: 3px solid var(--periwinkle); outline-offset: -3px; }

.code-area {
  flex: 1;
  width: 100%;
  min-height: 0;
  resize: none;
  border: 0;
  padding: 18px 20px 24px;
  background: var(--surface-lowest);
  color: var(--on-surface);
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.7;
  tab-size: 2;
  white-space: pre;
  overflow: auto;
}
.code-area:focus { outline: 0; box-shadow: inset 2px 0 0 var(--periwinkle); }
.code-area[hidden] { display: none; }
.code-area::selection { background: rgba(143, 146, 255, 0.35); }

/* Result side */
.editor-preview { position: relative; min-width: 0; min-height: 0; background: var(--surface-lowest); }
.editor-frame { width: 100%; height: 100%; border: 0; display: block; background: transparent; }
.editor-status {
  position: absolute;
  right: 14px; bottom: 14px;
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 7px 14px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--ghost);
  background: rgba(11, 15, 16, 0.72);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--outline);
  pointer-events: none;
  transition: color 0.3s;
}
.editor-status i {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--amber);
  transition: background 0.3s, transform 0.3s var(--ease);
}
.editor-status.is-running { color: var(--amber); }
.editor-status.is-running i { transform: scale(1.35); }

@media (max-width: 860px) {
  .editor-split { grid-template-columns: 1fr; grid-template-rows: 1fr 1fr; }
  .editor-code { border-right: 0; border-bottom: 1px solid var(--ghost); }
  .editor-bar { flex-wrap: wrap; gap: 10px; }
  .editor-actions { margin-left: 0; width: 100%; }
  .editor-note { display: none; }
}

/* ==========================================================================
   REDUCED MOTION
   ========================================================================== */
@media (prefers-reduced-motion: reduce) {
  .pen-card:hover { transform: none; }
  .pen-idle:hover::before { transform: none; }
}