.playground-shell {
  width: min(100%, var(--max));
  margin: 0 auto;
  padding: 3rem clamp(1.1rem, 4vw, 4rem) max(5rem, env(safe-area-inset-bottom));
}

.playground-content {
  width: min(100%, 60rem);
}

.playground-intro {
  padding-bottom: 2rem;
  border-bottom: 1px solid var(--ink);
}

.playground-intro h1 {
  margin: 0 0 -0.08em -0.035em;
  font-family: var(--font-editorial);
  font-size: var(--app-title);
  font-weight: 500;
  letter-spacing: -0.035em;
  line-height: 1.05;
}

.playground-form {
  display: grid;
  gap: var(--space-sm);
  padding: clamp(2rem, 4vw, 3rem) 0 clamp(3rem, 6vw, 5rem);
}

.playground-form label {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.model-picker {
  display: block;
  margin: 0 0 var(--space-lg);
  padding: 0;
  border: 1px solid var(--border);
}

.model-picker legend {
  float: none;
  width: 100%;
  box-sizing: border-box;
  padding: var(--space-sm) var(--space-md);
  border-bottom: 1px solid var(--border);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.model-picker-options {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.model-picker label {
  position: relative;
  min-width: 0;
  cursor: pointer;
}

.model-picker label + label { border-left: 1px solid var(--border); }
.model-picker input { position: absolute; opacity: 0; pointer-events: none; }

.model-picker label > span {
  min-height: 5.5rem;
  display: grid;
  align-content: center;
  gap: 0.2rem;
  padding: var(--space-md);
  background: transparent;
  transition: background 180ms var(--ease-out), color 180ms var(--ease-out);
}

.model-picker strong {
  font-family: var(--font-editorial);
  font-size: 1.2rem;
  font-weight: 500;
  letter-spacing: -0.015em;
  text-transform: none;
}

.model-picker small {
  color: var(--ink-soft);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0;
  text-transform: none;
}

.model-picker input:checked + span { background: var(--ink); color: var(--paper); }
.model-picker input:checked + span small { color: var(--paper-deep); }
.model-picker input:focus-visible + span { outline: 3px solid var(--oxide); outline-offset: -3px; }

.playground-form textarea {
  width: 100%;
  min-height: 12rem;
  resize: vertical;
  padding: var(--space-lg) 0;
  border: 0;
  border-bottom: 1px solid var(--border);
  border-radius: 0;
  outline: 0;
  background: transparent;
  color: var(--ink);
  font-family: var(--font-editorial);
  font-size: 1.25rem;
  line-height: 1.5;
}

.playground-form textarea::placeholder { color: oklch(58% 0.025 250); }
.playground-form textarea:focus { border-color: var(--ink); }
.playground-form textarea:focus-visible {
  box-shadow: 0 3px 0 -1px var(--oxide);
}

.playground-form-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-lg);
  padding-top: var(--space-sm);
}

.character-count,
.playground-output header > span {
  color: var(--ink-soft);
  font-size: 0.75rem;
  font-variant-numeric: tabular-nums;
}

.playground-form .field-message { min-height: 1.5rem; }

.playground-output {
  padding-top: clamp(2rem, 4vw, 3rem);
  border-top: 1px solid var(--ink);
}

.playground-output:not([hidden]) { display: block; }

.playground-output header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-lg);
}

.playground-answer {
  max-width: 54ch;
  min-height: 4rem;
  margin-top: var(--space-xl);
  color: var(--ink);
  font-family: var(--font-editorial);
  font-size: 1.25rem;
  line-height: 1.55;
  overflow-wrap: anywhere;
  white-space: pre-wrap;
}

.playground-output[aria-busy="true"] .playground-answer::after {
  content: "";
  display: inline-block;
  width: 0.42em;
  height: 0.9em;
  margin-left: 0.18em;
  background: var(--oxide);
  animation: playground-cursor 850ms steps(1, end) infinite;
  vertical-align: -0.05em;
}

@keyframes playground-cursor { 50% { opacity: 0; } }

.video-options:not([hidden]) {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-lg);
  margin-bottom: var(--space-md);
}

.video-options label { display: grid; gap: 0.4rem; }

.video-options select {
  min-width: 12rem;
  padding: 0.55rem 0.7rem;
  border: 1px solid var(--border);
  border-radius: 0;
  background: transparent;
  color: var(--ink);
  font: inherit;
  font-size: 0.95rem;
  letter-spacing: 0;
  text-transform: none;
}

.video-options select:focus-visible { outline: 3px solid var(--oxide); outline-offset: 1px; }
.run-actions { display: flex; gap: 0.5rem; flex-wrap: wrap; justify-content: flex-end; }
.live-note { color: var(--muted, #59636f); font-size: 0.9rem; line-height: 1.5; margin: 0; }

.playground-video:not([hidden]) {
  display: grid;
  gap: var(--space-sm);
  justify-items: start;
  margin-top: var(--space-xl);
}

.playground-video video {
  width: 100%;
  max-height: 70vh;
  background: var(--ink);
}

.playground-output[aria-busy="true"] .playground-answer:empty::after { margin-left: 0; }

@media (max-width: 55.99rem) {
  .model-picker-options { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .model-picker label:nth-child(odd) { border-left: 0; }
  .model-picker label:nth-child(n + 3) { border-top: 1px solid var(--border); }
}

@media (max-width: 41.99rem) {
  .playground-shell { padding-top: var(--space-2xl); }
  .playground-form textarea { min-height: 12rem; }
  .playground-form-footer .console-button { min-width: 7rem; }
  .model-picker-options { grid-template-columns: 1fr; }
  .model-picker label + label { border-top: 1px solid var(--border); border-left: 0; }
}

@media (prefers-reduced-motion: reduce) {
  .playground-output[aria-busy="true"] .playground-answer::after { animation: none; }
}