/* ============================================================
   PLAYGROUND
   ============================================================ */

.pg-body {
  height: 100vh;
  height: 100dvh;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.pg-wrap {
  flex: 1;
  min-height: 0;
  display: flex;
  position: relative;
  z-index: 2;
}

/* ─── Gate ────────────────────────────────────────────────────────── */

.pg-gate {
  flex: 1;
  display: grid;
  place-items: center;
  padding: 20px var(--gutter);
}
.pg-gate-inner {
  max-width: 540px;
  text-align: center;
}
.pg-kicker {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--vermillion);
  margin-bottom: 24px;
}
.pg-title {
  font-family: var(--serif);
  font-weight: 380;
  font-size: clamp(42px, 6vw, 72px);
  line-height: 0.98;
  letter-spacing: -0.025em;
  margin: 0 0 18px;
  font-variation-settings: "opsz" 96, "SOFT" 30;
}
.pg-title em {
  font-style: italic;
  color: var(--vermillion);
  font-variation-settings: "opsz" 96, "SOFT" 100, "WONK" 1;
}
.pg-sub {
  font-family: var(--serif);
  font-size: 17px;
  line-height: 1.5;
  color: var(--ink-soft);
  margin: 0 0 28px;
  font-variation-settings: "opsz" 18;
}
.pg-gate-meta {
  margin-top: 14px;
  font-family: var(--sans);
  font-size: 14px;
  color: var(--sage);
}

/* ─── Shell layout ───────────────────────────────────────────────── */

.pg-shell {
  flex: 1;
  display: grid;
  grid-template-columns: 1fr;
  min-height: 0;
  min-width: 0;
}
@media (min-width: 900px) {
  .pg-shell { grid-template-columns: 280px minmax(0, 1fr); }
}

/* ─── Sidebar ────────────────────────────────────────────────────── */

.pg-side {
  border-right: var(--rule) solid var(--hairline);
  padding: 20px 18px;
  background: var(--paper-deep);
  display: flex;
  flex-direction: column;
  gap: 18px;
  overflow-y: auto;
}
@media (max-width: 899px) {
  .pg-side {
    border-right: none;
    border-bottom: var(--rule) solid var(--hairline);
    max-height: 42vh;
  }
}

.pg-side-row { display: flex; flex-direction: column; gap: 6px; }
.pg-side-row.pg-check {
  flex-direction: row;
  align-items: center;
  gap: 8px;
}
.pg-label {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--sage);
  display: flex;
  justify-content: space-between;
  align-items: baseline;
}
.pg-label span {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0;
  text-transform: none;
  color: var(--ink);
}

.pg-select {
  padding: 8px 10px;
  font-family: var(--mono);
  font-size: 12px;
  border: var(--rule) solid var(--hairline);
  border-radius: 4px;
  background: var(--paper);
  color: var(--ink);
  width: 100%;
  cursor: pointer;
}
.pg-select:hover { border-color: var(--ink); }
.pg-select:focus { outline: 2px solid color-mix(in oklab, var(--vermillion) 40%, transparent); outline-offset: 1px; }

input[type="range"] {
  appearance: none;
  width: 100%;
  height: 4px;
  background: var(--hairline);
  border-radius: 999px;
  outline: none;
}
input[type="range"]::-webkit-slider-thumb {
  appearance: none;
  width: 14px; height: 14px;
  border-radius: 50%;
  background: var(--vermillion);
  border: 2px solid var(--paper);
  box-shadow: 0 0 0 1px var(--vermillion);
  cursor: pointer;
}
input[type="range"]::-moz-range-thumb {
  width: 14px; height: 14px;
  border-radius: 50%;
  background: var(--vermillion);
  border: 2px solid var(--paper);
  cursor: pointer;
}

.pg-params summary,
.pg-usage summary {
  cursor: pointer;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--ink);
  padding: 6px 0;
  user-select: none;
}
.pg-params,
.pg-usage {
  border-top: var(--rule) dashed var(--hairline);
  padding-top: 10px;
}
.pg-params[open] summary,
.pg-usage[open] summary { color: var(--vermillion); }
.pg-params > div + div { margin-top: 12px; }

.pg-system textarea {
  width: 100%;
  min-height: 72px;
  resize: vertical;
  padding: 8px 10px;
  font-family: var(--sans);
  font-size: 13px;
  line-height: 1.4;
  border: var(--rule) solid var(--hairline);
  border-radius: 4px;
  background: var(--paper);
  color: var(--ink);
}
.pg-system textarea:focus {
  outline: 2px solid color-mix(in oklab, var(--vermillion) 40%, transparent);
  outline-offset: 1px;
}

.pg-kvs {
  display: grid;
  gap: 6px;
  margin: 8px 0 14px;
}
.pg-kvs > div {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 10px;
  align-items: baseline;
  padding: 4px 0;
  border-bottom: var(--rule) dashed var(--hairline);
}
.pg-kvs dt {
  margin: 0;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--sage);
}
.pg-kvs dd {
  margin: 0;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--ink);
  text-align: right;
}

.pg-mini {
  padding: 6px 12px !important;
  font-size: 12px !important;
  border-radius: 4px !important;
}
.pg-side-actions {
  margin-top: auto;
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding-top: 12px;
  border-top: var(--rule) dashed var(--hairline);
}

/* ─── Conversation column ────────────────────────────────────────── */

.pg-conv {
  display: flex;
  flex-direction: column;
  min-height: 0;
  min-width: 0;
  background: var(--paper);
}

.pg-messages {
  flex: 1;
  overflow-y: auto;
  padding: 24px clamp(16px, 3vw, 48px);
  display: flex;
  flex-direction: column;
  gap: 18px;
  scroll-behavior: smooth;
}

.pg-empty {
  margin: auto;
  text-align: center;
  padding: 40px 16px;
}
.pg-empty-kicker {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--vermillion);
  margin: 0 0 12px;
}
.pg-empty-title {
  font-family: var(--serif);
  font-weight: 380;
  font-size: clamp(40px, 6vw, 72px);
  letter-spacing: -0.03em;
  color: var(--ink);
  margin: 0;
  font-variation-settings: "opsz" 96, "SOFT" 30;
}
.pg-empty-title em {
  font-style: italic;
  color: var(--vermillion);
  font-variation-settings: "opsz" 96, "SOFT" 100, "WONK" 1;
}

.pg-msg {
  display: grid;
  grid-template-columns: 48px minmax(0, 1fr);
  gap: 14px;
  max-width: 780px;
  width: 100%;
  margin: 0 auto;
}
.pg-msg-role {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--sage);
  padding-top: 4px;
  text-align: right;
}
.pg-msg--user .pg-msg-role { color: var(--ink); }
.pg-msg--assistant .pg-msg-role { color: var(--vermillion); }

.pg-msg-body {
  font-family: var(--serif);
  font-size: 17px;
  line-height: 1.6;
  color: var(--ink);
  white-space: pre-wrap;
  word-break: break-word;
  font-variation-settings: "opsz" 18;
}
.pg-msg-body code {
  font-family: var(--mono);
  font-size: 13px;
  background: var(--paper-deep);
  padding: 1px 6px;
  border-radius: 3px;
  color: var(--vermillion);
}
.pg-msg-body pre {
  font-family: var(--mono);
  font-size: 13px;
  background: #15151A;
  color: var(--paper);
  padding: 12px 14px;
  border-radius: 6px;
  overflow-x: auto;
  line-height: 1.55;
  white-space: pre;
  margin: 8px 0;
}
.pg-msg-body pre code {
  background: transparent;
  color: inherit;
  font-size: inherit;
  padding: 0;
}

.pg-msg-meta {
  margin-top: 8px;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.14em;
  color: var(--sage);
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

.pg-msg--reasoning .pg-msg-body {
  color: var(--sage);
  font-style: italic;
  font-size: 15px;
}

/* Input bar */

.pg-input-bar {
  border-top: var(--rule) solid var(--hairline);
  padding: 14px clamp(16px, 3vw, 48px);
  display: grid;
  grid-template-columns: minmax(0, 1fr) 52px;
  gap: 10px;
  align-items: end;
  background: var(--paper);
}
#pg-input {
  width: 100%;
  resize: none;
  max-height: 200px;
  min-height: 44px;
  padding: 12px 16px;
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.45;
  border: var(--rule) solid var(--hairline);
  border-radius: 22px;
  background: var(--paper);
  color: var(--ink);
  transition: border-color 200ms var(--ease), box-shadow 200ms var(--ease);
}
#pg-input:focus {
  outline: none;
  border-color: var(--ink);
  box-shadow: 0 0 0 4px color-mix(in oklab, var(--vermillion) 20%, transparent);
}
.pg-send {
  width: 48px;
  height: 48px;
  border: none;
  border-radius: 50%;
  background: var(--ink);
  color: var(--paper);
  cursor: pointer;
  display: inline-grid;
  place-items: center;
  transition: background 200ms var(--ease), transform 200ms var(--ease);
}
.pg-send:hover { background: var(--vermillion); }
.pg-send:active { transform: scale(0.96); }
.pg-send:disabled { opacity: 0.5; cursor: wait; }

.pg-turn-meta {
  padding: 6px clamp(16px, 3vw, 48px) 10px;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.14em;
  color: var(--sage);
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ─── Cursor (blinking while streaming) ─────────────────────────── */

.pg-caret::after {
  content: "▎";
  color: var(--vermillion);
  animation: blink 1.05s steps(1) infinite;
  margin-left: 2px;
}