/* Playground: full-height split workbench on the same design tokens. */

.pg-body { display: flex; flex-direction: column; height: 100vh; height: 100dvh; overflow: hidden; }
.pg-wrap { gap: 1.5rem; }
.pg-toolbar { display: flex; align-items: center; gap: .75rem; flex: 1; min-width: 0; flex-wrap: wrap; }
@media (max-width: 56rem) {
  .pg-body .site-header .wrap { flex-wrap: wrap; height: auto; padding-block: .5rem; row-gap: .4rem; }
  .pg-status { flex-basis: 100%; order: 10; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
  .pg-body .nav { display: none; }
}
.pg-toolbar select {
  font: inherit; font-size: .88rem; color: var(--ink);
  background: var(--paper-raised); border: 1px solid var(--line-strong);
  padding: .4rem .6rem;
}
.pg-toolbar .run {
  font: inherit; font-size: .88rem; font-weight: 600; cursor: pointer;
  background: var(--blue); color: #fff; border: 1px solid transparent;
  padding: .45rem 1.1rem; transition: background .15s;
}
.pg-toolbar .run:hover { background: var(--blue-bright); }
.pg-status { font-family: var(--mono); font-size: .75rem; color: var(--ink-faint); }
.pg-status.ok { color: var(--ok); }
.pg-status.err { color: var(--safety); }

.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }

.pg-main { flex: 1; display: grid; grid-template-columns: var(--split, 42%) 6px 1fr 0 0; min-height: 0; }
body.ai-open .pg-main { grid-template-columns: var(--split, 34%) 6px 1fr 6px var(--chat, 24%); }
.chat-divider { display: none; }
body.ai-open .chat-divider { display: block; }
/* The landing page gives every <section> a generous padding-block; the
   workbench panes are sections too and must not inherit it. */
.pg-main section { padding-block: 0; }
.pg-divider {
  cursor: col-resize; background: var(--line-strong);
  transition: background .15s;
}
.pg-divider:hover, .pg-divider.dragging { background: var(--blue); }
@media (max-width: 56rem) {
  .pg-main { grid-template-columns: 1fr; grid-template-rows: 45% 1fr 0; }
  body.ai-open .pg-main { grid-template-columns: 1fr; grid-template-rows: 30% 1fr 35%; }
  .pg-divider { display: none; }
}

/* AI chat drawer */
.ai-btn {
  font: inherit; font-size: .88rem; font-weight: 600; cursor: pointer;
  background: none; color: var(--blue); border: 1.5px solid var(--blue);
  padding: .4rem .9rem; transition: all .15s;
}
.ai-btn:hover, body.ai-open .ai-btn { background: var(--blue); color: #fff; }
.share-btn {
  font: inherit; font-size: .88rem; font-weight: 600; cursor: pointer;
  background: none; color: var(--ink-soft); border: 1.5px solid var(--line-strong);
  padding: .4rem .9rem; transition: all .15s;
}
.share-btn:hover { border-color: var(--ink); color: var(--ink); }
.pg-foot .bug-link { margin-left: 1rem; color: var(--ink-faint); }
.pg-foot .bug-link:hover { color: var(--safety); }
.pg-chat {
  display: flex; flex-direction: column; min-height: 0; min-width: 0;
  border-left: 1px solid var(--line-strong); background: var(--paper-raised);
  overflow: hidden; visibility: hidden;
}
body.ai-open .pg-chat { visibility: visible; }
.ai-head {
  padding: .8rem 1rem; font-size: .85rem;
  border-bottom: 1px solid var(--line);
  background: linear-gradient(135deg, color-mix(in oklab, var(--blue) 10%, var(--paper-raised)), var(--paper-raised) 60%);
}
.ai-head > strong { letter-spacing: -0.01em; }
.ai-head details { margin-top: .4rem; font-size: .78rem; color: var(--ink-soft); }
.ai-head summary { cursor: pointer; font-family: var(--mono); font-size: .72rem; color: var(--blue); }
.ai-head label { display: block; margin: .4rem 0 .3rem; }
.ai-head input {
  width: 100%; font: inherit; font-family: var(--mono); font-size: .75rem;
  padding: .4rem .5rem; border: 1px solid var(--line-strong); background: var(--paper);
  color: var(--ink);
}
.ai-hint { margin-top: .3rem; color: var(--ink-faint); }
.ai-log { flex: 1; overflow-y: auto; padding: 1rem; display: grid; gap: .7rem; align-content: start; }
.ai-msg {
  font-size: .84rem; line-height: 1.55; padding: .7rem .95rem; max-width: 92%;
  white-space: pre-wrap; overflow-wrap: break-word; position: relative;
  border-radius: 14px; box-shadow: 0 1px 2px color-mix(in oklab, var(--ink) 6%, transparent);
}
.ai-msg.user {
  background: linear-gradient(135deg, var(--blue), var(--blue-bright));
  color: #fff; justify-self: end; border-bottom-right-radius: 4px;
}
.ai-msg.assistant {
  background: var(--paper); border: 1px solid var(--line);
  border-bottom-left-radius: 4px;
}
.ai-msg.assistant::before {
  content: "✦"; position: absolute; top: -0.55rem; left: .6rem;
  font-size: .7rem; color: var(--safety); background: var(--paper-raised);
  padding: 0 .3rem;
}
.ai-msg.error { border-color: var(--safety); color: var(--safety); }
.ai-chips { display: flex; flex-wrap: wrap; gap: .4rem; padding: 0 1rem .5rem; }
.ai-chips button {
  font: inherit; font-size: .74rem; cursor: pointer; color: var(--blue);
  background: none; border: 1px solid color-mix(in oklab, var(--blue) 40%, transparent);
  border-radius: 999px; padding: .3rem .75rem; transition: all .15s;
  text-align: left;
}
.ai-chips button:hover { background: var(--blue); color: #fff; }
.ai-apply {
  display: block; margin-top: .5rem; font: inherit; font-size: .78rem; font-weight: 600;
  cursor: pointer; background: var(--ok); color: #fff; border: 0; padding: .35rem .7rem;
}
.ai-apply:disabled { opacity: .7; cursor: default; }
.ai-composer { display: flex; gap: .5rem; padding: .75rem; border-top: 1px solid var(--line); align-items: flex-end; }
.ai-composer textarea {
  flex: 1; font: inherit; font-size: .84rem; resize: none; padding: .6rem .9rem;
  border: 1.5px solid var(--line-strong); border-radius: 12px;
  background: var(--paper); color: var(--ink); transition: border-color .15s;
}
.ai-composer textarea:focus { outline: none; border-color: var(--blue); }
.ai-composer button {
  font: inherit; font-size: .95rem; font-weight: 700; cursor: pointer;
  background: var(--blue); color: #fff; border: 0;
  width: 2.4rem; height: 2.4rem; border-radius: 50%; flex-shrink: 0;
  display: grid; place-content: center; transition: background .15s, transform .15s;
}
.ai-composer button:hover { background: var(--blue-bright); transform: scale(1.06); }

/* editor — light theme with syntax highlighting: a colored <pre> renders
   under a transparent-text textarea (caret stays native). */
.pg-editor {
  display: grid; grid-template-columns: 3.2rem 1fr; min-height: 0;
  background: var(--paper-raised); border-right: 1px solid var(--line-strong);
}
.pg-gutter {
  overflow: hidden; text-align: right; padding: 1rem .6rem 1rem 0;
  font-family: var(--mono); font-size: .8rem; line-height: 1.6;
  color: var(--ink-faint); user-select: none;
  border-right: 1px solid var(--line);
  white-space: pre; background: var(--paper);
}
.editor-stack { position: relative; min-height: 0; overflow: hidden; }
.editor-stack pre {
  position: absolute; inset: 0; margin: 0; padding: 1rem; overflow: hidden;
  font-family: var(--mono); font-size: .8rem; line-height: 1.6;
  white-space: pre; tab-size: 2; color: var(--ink); pointer-events: none;
}
.editor-stack textarea {
  position: absolute; inset: 0; width: 100%; height: 100%;
  font-family: var(--mono); font-size: .8rem; line-height: 1.6;
  color: transparent; caret-color: var(--blue); background: transparent;
  border: 0; resize: none; padding: 1rem; outline: none; white-space: pre;
  overflow: auto; tab-size: 2;
}
.editor-stack textarea::selection { background: color-mix(in oklab, var(--blue) 25%, transparent); color: transparent; }
/* token palette — light, high-contrast, print-like */
.tk-kw { color: oklch(45% 0.19 280); font-weight: 600; }
.tk-str { color: oklch(46% 0.13 150); }
.tk-com { color: var(--ink-faint); font-style: italic; }
.tk-num { color: oklch(52% 0.16 45); }
.tk-attr { color: oklch(45% 0.12 240); }

/* result panel */
.pg-result { display: flex; flex-direction: column; min-height: 0; background: var(--paper); }
.pg-tabs { display: flex; border-bottom: 1px solid var(--line-strong); background: var(--paper-raised); }
.pg-tabs [role="tab"] {
  font: inherit; font-size: .85rem; padding: .65rem 1.2rem; cursor: pointer;
  background: none; border: 0; border-right: 1px solid var(--line);
  color: var(--ink-soft); position: relative;
}
.pg-tabs [role="tab"][aria-selected="true"] {
  color: var(--ink); font-weight: 600; background: var(--paper);
  box-shadow: inset 0 -2px 0 var(--safety);
}
.badge {
  font-family: var(--mono); font-size: .68rem; background: var(--safety); color: #fff;
  padding: 0 .4em; border-radius: 999px; margin-left: .3em;
}
.pg-panes { flex: 1; min-height: 0; position: relative; }
.pane { position: absolute; inset: 0; display: none; overflow: auto; }
.pane.active { display: block; }
.pane iframe { width: 100%; height: 100%; border: 0; background: #fff; }
.pane-empty {
  position: absolute; inset: 0; display: grid; place-content: center;
  color: var(--ink-faint); font-size: .9rem; padding: 2rem; text-align: center;
}
.pane-empty[hidden] { display: none; }

/* diagnostics */
.diag-list { list-style: none; padding: 1rem; display: grid; gap: .5rem; }
.diag-list li {
  font-family: var(--mono); font-size: .78rem; line-height: 1.5;
  padding: .6rem .8rem; border-left: 3px solid var(--line-strong);
  background: var(--paper-raised); white-space: pre-wrap;
}
.diag-list li.error { border-left-color: var(--safety); }
.diag-list li.warning { border-left-color: oklch(70% 0.15 90); }
.diag-list li.ok { border-left-color: var(--ok); color: var(--ink-soft); }

/* gate */
.gate-report { padding: 1.25rem; font-size: .9rem; }
.gate-verdict {
  font-family: var(--mono); font-size: 1.05rem; font-weight: 700;
  padding: .8rem 1rem; margin-bottom: 1rem; border: 1.5px solid;
}
.gate-verdict.pass { color: var(--ok); border-color: var(--ok); }
.gate-verdict.fail { color: var(--safety); border-color: var(--safety); }
.gate-report table { width: 100%; border-collapse: collapse; font-size: .82rem; }
.gate-report td, .gate-report th {
  text-align: left; padding: .45rem .6rem; border-bottom: 1px solid var(--line);
  vertical-align: top;
}
.gate-report th { font-family: var(--mono); font-size: .7rem; text-transform: uppercase; letter-spacing: .08em; color: var(--ink-faint); }
.sev { font-family: var(--mono); font-size: .7rem; padding: .1em .45em; border: 1px solid; }
.sev.Blocker { color: var(--safety); border-color: var(--safety); }
.sev.Warning { color: oklch(60% 0.14 90); border-color: currentColor; }

.pg-foot {
  border-top: 1px solid var(--line-strong); padding: .55rem 1.25rem;
  font-size: .75rem; color: var(--ink-faint); background: var(--paper-raised);
}
.pg-foot strong { color: var(--ink-soft); }