/* Lumbda playground SPA — vanilla CSS, mono terminal aesthetic */

:root {
  --bg: #0f1115;
  --fg: #d6dadf;
  --dim: #8b9099;
  --accent: #6ee7b7;
  --warn: #fbbf24;
  --err: #fb7185;
  --pane: #15181f;
  --border: #262a33;
  --mono: ui-monospace, "SF Mono", Menlo, Consolas, "Courier New", monospace;
}

* { box-sizing: border-box; }

html, body {
  margin: 0; padding: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--mono);
  font-size: 13px;
  height: 100%;
}

header {
  padding: 16px 24px 8px;
  border-bottom: 1px solid var(--border);
}
header h1 {
  margin: 0 0 4px;
  font-size: 18px;
  font-weight: 600;
  color: var(--accent);
}
header h1 .sub {
  color: var(--dim);
  font-weight: 400;
  font-size: 13px;
}
header .tag {
  margin: 0;
  color: var(--dim);
  font-size: 12px;
  line-height: 1.5;
}
header code {
  color: var(--warn);
  font-size: 11px;
}
header strong {
  color: var(--fg);
  font-weight: 600;
}

.controls {
  padding: 12px 24px;
  border-bottom: 1px solid var(--border);
  display: flex;
  gap: 16px;
  align-items: center;
  flex-wrap: wrap;
}
.controls fieldset {
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 4px 10px 6px;
  margin: 0;
}
.controls fieldset legend {
  color: var(--dim);
  font-size: 11px;
  padding: 0 4px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}
.controls label {
  margin-right: 10px;
  cursor: pointer;
  user-select: none;
}
.controls label input { margin-right: 4px; }

.controls button {
  background: var(--accent);
  color: #0a0c0f;
  border: none;
  padding: 6px 16px;
  border-radius: 4px;
  font-family: var(--mono);
  font-weight: 600;
  font-size: 13px;
  cursor: pointer;
}
.controls button:hover { filter: brightness(1.1); }
.controls button:disabled { opacity: 0.4; cursor: wait; }

.controls .status {
  color: var(--dim);
  font-size: 12px;
  margin-left: auto;
}
.controls .status.busy { color: var(--warn); }
.controls .status.err  { color: var(--err); }
.controls .status.ok   { color: var(--accent); }

.panes {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--border);
  height: calc(100vh - 220px);
  min-height: 360px;
}
.pane {
  background: var(--pane);
  padding: 8px 12px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}
.pane h2 {
  margin: 0 0 8px;
  font-size: 11px;
  font-weight: 500;
  color: var(--dim);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

#editor {
  flex: 1;
  overflow: hidden;
}
.cm-editor { height: 100%; font-size: 13px; }
.cm-editor.cm-focused { outline: none; }

#output {
  flex: 1;
  white-space: pre;
  overflow: auto;
  background: #0a0c10;
  border: 1px solid var(--border);
  padding: 8px 10px;
  font-size: 13px;
  line-height: 1.35;
  border-radius: 2px;
}
#output .tier-block {
  margin-bottom: 14px;
}
#output .tier-block h3 {
  margin: 0 0 4px;
  font-size: 11px;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 600;
}
#output .tier-block .time {
  color: var(--dim);
  font-size: 11px;
  font-weight: 400;
}
#output .tier-block pre {
  margin: 0;
  white-space: pre;
}
#output .err { color: var(--err); }

footer {
  padding: 8px 24px;
  border-top: 1px solid var(--border);
  color: var(--dim);
  font-size: 11px;
}
footer code {
  color: var(--warn);
}
footer a {
  color: var(--accent);
  text-decoration: none;
}