/* TypeFerence Playground — no dependencies, light/dark via custom properties. */

:root {
  --bg: #f4f5f8;
  --panel: #ffffff;
  --panel-2: #eef0f4;
  --border: #d8dce4;
  --text: #1b2330;
  --text-dim: #5b6472;
  --accent: #4f46e5;
  --accent-dim: #eef2ff;
  --error: #b91c1c;
  --error-bg: #fef2f2;
  --ok: #047857;
  --sel: #dbe3ff;
  /* syntax */
  --syn-key: #7c3aed;
  --syn-str: #0f766e;
  --syn-num: #b45309;
  --syn-comment: #94a3b8;
  --syn-punct: #64748b;
  /* graph node kinds */
  --kind-agent: #4f46e5;
  --kind-profile: #0891b2;
  --kind-skill: #059669;
  --kind-capability: #d97706;
  --kind-interface: #9333ea;
}
[data-theme="dark"] {
  --bg: #0d1117;
  --panel: #161b22;
  --panel-2: #1c2330;
  --border: #2d3543;
  --text: #e6edf3;
  --text-dim: #8b949e;
  --accent: #818cf8;
  --accent-dim: #1e2242;
  --error: #f87171;
  --error-bg: #2c1516;
  --ok: #34d399;
  --sel: #26304d;
  --syn-key: #c4b5fd;
  --syn-str: #5eead4;
  --syn-num: #fbbf24;
  --syn-comment: #586374;
  --syn-punct: #8b949e;
  --kind-agent: #818cf8;
  --kind-profile: #22d3ee;
  --kind-skill: #34d399;
  --kind-capability: #fbbf24;
  --kind-interface: #c084fc;
}

* { box-sizing: border-box; }
html, body { height: 100%; margin: 0; }
body {
  display: flex;
  flex-direction: column;
  font: 14px/1.45 ui-sans-serif, system-ui, "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text);
}
code, pre, textarea, select, .mono { font-family: ui-monospace, "Cascadia Code", Consolas, monospace; }

/* ---------- header ---------- */
header {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 8px 14px;
  background: var(--panel);
  border-bottom: 1px solid var(--border);
  flex-wrap: wrap;
}
.brand { display: flex; align-items: center; gap: 9px; }
.brand h1 { font-size: 16px; margin: 0; font-weight: 650; letter-spacing: .1px; }
.brand h1 span { color: var(--accent); font-weight: 500; }
.tagline { color: var(--text-dim); font-size: 12px; }
.spacer { flex: 1; }
.control { display: inline-flex; align-items: center; gap: 6px; color: var(--text-dim); font-size: 12.5px; }
.control select {
  background: var(--panel-2);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 4px 6px;
  font-size: 12.5px;
}
.control.checkbox input { accent-color: var(--accent); }
button.ghost, a.ghost {
  background: none;
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  padding: 4px 10px;
  font-size: 12.5px;
  cursor: pointer;
  text-decoration: none;
}
button.ghost:hover, a.ghost:hover { border-color: var(--accent); color: var(--accent); }

/* ---------- layout ---------- */
main {
  flex: 1;
  display: grid;
  grid-template-columns: 190px minmax(320px, 43fr) minmax(320px, 57fr);
  min-height: 0;
}
@media (max-width: 900px) {
  main { grid-template-columns: 150px 1fr; grid-template-rows: 45vh 45vh; }
  #output-pane { grid-column: 1 / -1; }
}

/* ---------- file pane ---------- */
#file-pane {
  background: var(--panel);
  border-right: 1px solid var(--border);
  overflow-y: auto;
  min-height: 0;
}
.pane-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 10px 4px;
  font-size: 11px;
  font-weight: 650;
  text-transform: uppercase;
  letter-spacing: .8px;
  color: var(--text-dim);
}
.pane-head .ghost { padding: 0 7px; font-size: 14px; line-height: 1.4; }
#file-list { list-style: none; margin: 0; padding: 0 0 10px; }
#file-list li {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 3px 10px 3px 14px;
  font-size: 12.5px;
  font-family: ui-monospace, Consolas, monospace;
  cursor: pointer;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  border-left: 2px solid transparent;
}
#file-list li:hover { background: var(--panel-2); }
#file-list li.active { background: var(--sel); border-left-color: var(--accent); }
#file-list li .del { visibility: hidden; border: 0; background: none; color: var(--text-dim); cursor: pointer; font-size: 12px; padding: 0 2px; }
#file-list li:hover .del { visibility: visible; }
#file-list li .del:hover { color: var(--error); }
#file-list li.dir {
  cursor: default;
  color: var(--text-dim);
  font-size: 11px;
  padding-top: 7px;
  text-transform: none;
  font-family: ui-sans-serif, system-ui, sans-serif;
}
#file-list li.dir:hover { background: none; }

/* ---------- editor ---------- */
#editor-pane { display: flex; flex-direction: column; min-width: 0; min-height: 0; border-right: 1px solid var(--border); }
.editor { position: relative; flex: 1; min-height: 0; background: var(--panel); }
.editor pre, .editor textarea {
  position: absolute;
  inset: 0;
  margin: 0;
  padding: 12px 14px;
  font-size: 13px;
  line-height: 1.5;
  tab-size: 2;
  white-space: pre;
  overflow: auto;
  border: 0;
}
.editor pre { pointer-events: none; }
.editor pre code { display: block; min-height: 100%; }
.editor textarea {
  width: 100%;
  height: 100%;
  resize: none;
  background: transparent;
  color: transparent;
  caret-color: var(--text);
  outline: none;
  overflow: auto;
}
.editor textarea::selection { background: var(--sel); color: transparent; }

#diagnostics {
  border-top: 1px solid var(--border);
  background: var(--error-bg);
  color: var(--error);
  padding: 8px 14px;
  font-size: 12.5px;
  font-family: ui-monospace, Consolas, monospace;
  white-space: pre-wrap;
  max-height: 30%;
  overflow-y: auto;
}

/* ---------- output pane ---------- */
#output-pane { display: flex; flex-direction: column; min-width: 0; min-height: 0; background: var(--panel); }
.tabs { display: flex; gap: 2px; border-bottom: 1px solid var(--border); padding: 0 8px; background: var(--panel); }
.tabs button {
  background: none;
  border: 0;
  border-bottom: 2px solid transparent;
  color: var(--text-dim);
  padding: 8px 12px;
  font-size: 13px;
  cursor: pointer;
}
.tabs button:hover { color: var(--text); }
.tabs button.active { color: var(--accent); border-bottom-color: var(--accent); font-weight: 600; }
.tab { display: none; flex: 1; min-height: 0; }
.tab.active { display: flex; }
#output-pane.stale .tab { opacity: .45; }

#tab-artifacts { display: none; }
#tab-artifacts.active { display: flex; }
#artifact-list {
  width: 240px;
  overflow-y: auto;
  border-right: 1px solid var(--border);
  padding: 6px 0;
  flex-shrink: 0;
}
#artifact-list .dir { padding: 6px 10px 2px; font-size: 11px; color: var(--text-dim); }
#artifact-list .file {
  padding: 2px 10px 2px 18px;
  font-size: 12px;
  font-family: ui-monospace, Consolas, monospace;
  cursor: pointer;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  border-left: 2px solid transparent;
}
#artifact-list .file:hover { background: var(--panel-2); }
#artifact-list .file.active { background: var(--sel); border-left-color: var(--accent); }
#artifact-view, #bundle-view {
  flex: 1;
  margin: 0;
  padding: 12px 14px;
  overflow: auto;
  font-size: 12.5px;
  line-height: 1.5;
  min-width: 0;
}

#tab-graph { flex-direction: column; }
#graph-legend { display: flex; gap: 14px; flex-wrap: wrap; padding: 8px 14px; font-size: 12px; color: var(--text-dim); border-bottom: 1px solid var(--border); }
#graph-legend .swatch { display: inline-block; width: 10px; height: 10px; border-radius: 3px; margin-right: 5px; vertical-align: -1px; }
#graph-legend .edge-sample { display: inline-block; width: 22px; height: 2px; margin-right: 5px; vertical-align: 3px; }
#graph-scroll { flex: 1; overflow: auto; }
#graph { display: block; margin: 0 auto; }
#graph .node rect { rx: 7px; fill: var(--panel-2); stroke-width: 1.6px; }
#graph .node text { font: 11.5px ui-monospace, Consolas, monospace; fill: var(--text); }
#graph .node .kind-label { font-size: 9px; fill: var(--text-dim); text-transform: uppercase; letter-spacing: .5px; }
#graph .edge { fill: none; stroke-width: 1.4px; opacity: .75; }
#graph .edge.satisfies { stroke-dasharray: 5 4; }
#graph .edge.skill, #graph .edge.binds, #graph .edge.capability, #graph .edge.requires { stroke-dasharray: 2 3; }
#graph .node:hover rect { fill: var(--sel); }

#tab-bundle { flex-direction: column; }
.bundle-head { display: flex; align-items: center; gap: 12px; padding: 8px 14px; border-bottom: 1px solid var(--border); }
.hint { color: var(--text-dim); font-size: 12px; }

/* ---------- BETH console ---------- */
#tab-beth { flex-direction: column; }
.beth-scroll { flex: 1; overflow-y: auto; min-height: 0; padding: 12px 16px 24px; }
.beth-intro { margin: 0 0 14px; font-size: 13px; color: var(--text-dim); max-width: 85ch; }
.beth-intro b, .beth-intro a { color: var(--text); }
.beth-intro a { color: var(--accent); }
.beth-step { border: 1px solid var(--border); border-radius: 8px; background: var(--panel-2); padding: 12px 14px; margin-bottom: 12px; }
.beth-step h3 { margin: 0 0 8px; font-size: 13.5px; display: flex; align-items: center; gap: 8px; }
.step-n {
  display: inline-flex; align-items: center; justify-content: center;
  width: 20px; height: 20px; border-radius: 50%;
  background: var(--accent); color: #fff; font-size: 11.5px; font-weight: 700;
}
.beth-row { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; margin-top: 8px; }
.beth-primary {
  background: var(--accent); border: 0; border-radius: 6px; color: #fff;
  padding: 7px 16px; font-size: 13px; font-weight: 600; cursor: pointer;
}
.beth-primary:hover { filter: brightness(1.1); }
.beth-primary:disabled { opacity: .55; cursor: default; }
.beth-cmd {
  margin: 10px 0 0; padding: 10px 12px; background: var(--panel);
  border: 1px solid var(--border); border-radius: 6px;
  font-size: 12px; overflow-x: auto; white-space: pre;
}
.beth-error { color: var(--error); font-size: 13px; }

.beth-scenario { margin-top: 12px; }
.beth-scenario h4 { margin: 0 0 6px; font-size: 12.5px; font-family: ui-monospace, Consolas, monospace; }
.beth-scenario details { margin-bottom: 8px; }
.beth-scenario summary { cursor: pointer; font-size: 12px; color: var(--text-dim); }
.beth-scenario details pre {
  margin: 6px 0 0; padding: 8px 10px; background: var(--panel);
  border: 1px solid var(--border); border-radius: 6px;
  font-size: 12px; white-space: pre-wrap;
}
.beth-cell-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 10px; }
.beth-cell { background: var(--panel); border: 1px solid var(--border); border-radius: 7px; padding: 8px; }
.beth-cell .cell-head { display: flex; align-items: center; gap: 8px; margin-bottom: 6px; }
.surface-chip {
  font-size: 11px; font-weight: 650; text-transform: uppercase; letter-spacing: .5px;
  background: var(--accent-dim); color: var(--accent);
  border-radius: 5px; padding: 2px 7px;
}
.beth-cell .collected { margin-left: auto; color: var(--ok); font-weight: 700; }
.beth-cell textarea {
  width: 100%; background: var(--panel-2); color: var(--text);
  border: 1px solid var(--border); border-radius: 6px;
  padding: 6px 8px; font-size: 12px; resize: vertical;
}
.beth-cell .cell-meta { display: flex; gap: 6px; margin-top: 6px; }
.beth-cell .cell-meta input {
  flex: 1; min-width: 0; background: var(--panel-2); color: var(--text);
  border: 1px solid var(--border); border-radius: 5px;
  padding: 3px 7px; font-size: 11.5px;
}

.beth-drop {
  display: block; border: 1.5px dashed var(--border); border-radius: 7px;
  padding: 14px; text-align: center; font-size: 12.5px; color: var(--text-dim);
  cursor: pointer;
}
.beth-drop.over, .beth-drop:hover { border-color: var(--accent); color: var(--accent); }

.beth-banner {
  margin-top: 12px; padding: 8px 12px; border-radius: 7px;
  font-weight: 700; font-size: 13px;
}
.beth-banner.pass { background: color-mix(in srgb, var(--ok) 14%, transparent); color: var(--ok); }
.beth-banner.fail { background: var(--error-bg); color: var(--error); }
.beth-metrics { margin-top: 10px; display: flex; flex-direction: column; gap: 6px; }
.beth-metric { display: flex; align-items: center; gap: 10px; font-size: 12.5px; }
.beth-metric .label { width: 90px; text-align: right; color: var(--text-dim); font-family: ui-monospace, Consolas, monospace; }
.beth-metric .bar { flex: 1; height: 8px; background: var(--panel); border: 1px solid var(--border); border-radius: 4px; overflow: hidden; }
.beth-metric .fill { display: block; height: 100%; background: var(--accent); }
.beth-metric .value { width: 46px; font-family: ui-monospace, Consolas, monospace; }
.beth-matrix { margin-top: 14px; overflow-x: auto; }
.beth-matrix h4 { margin: 0 0 6px; font-size: 12.5px; font-family: ui-monospace, Consolas, monospace; }
.beth-matrix table { border-collapse: collapse; font-size: 12.5px; }
.beth-matrix th, .beth-matrix td { border: 1px solid var(--border); padding: 4px 10px; text-align: center; }
.beth-matrix th { color: var(--text-dim); font-weight: 600; }
.beth-matrix .rubric-id { text-align: left; font-family: ui-monospace, Consolas, monospace; font-size: 11.5px; }
.beth-matrix td.pass { color: var(--ok); font-weight: 700; }
.beth-matrix td.fail { color: var(--error); font-weight: 700; }
.beth-matrix td.na { color: var(--text-dim); }
.beth-divergences { margin-top: 14px; }
.beth-divergences h4 { margin: 0 0 6px; font-size: 13px; }
.divergence { border: 1px solid var(--border); border-radius: 7px; background: var(--panel); padding: 8px 12px; margin-bottom: 8px; font-size: 12.5px; }
.divergence ul { margin: 6px 0 0; padding-left: 18px; }
.divergence .pass { color: var(--ok); font-weight: 600; }
.divergence .fail { color: var(--error); font-weight: 600; }

/* ---------- status bar ---------- */
footer {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-top: 1px solid var(--border);
  background: var(--panel);
  font-size: 12.5px;
  color: var(--text-dim);
  min-height: 30px;
}
footer.ok::before { content: "✓"; color: var(--ok); font-weight: 700; }
footer.error { color: var(--error); }
footer.error::before { content: "✕"; font-weight: 700; }
footer.loading::before { content: "…"; }
footer .digest { font-family: ui-monospace, Consolas, monospace; color: var(--text-dim); }
footer .digest b { color: var(--text); font-weight: 600; }

/* ---------- syntax highlighting ---------- */
.tok-key { color: var(--syn-key); }
.tok-str { color: var(--syn-str); }
.tok-num { color: var(--syn-num); }
.tok-comment { color: var(--syn-comment); font-style: italic; }
.tok-punct { color: var(--syn-punct); }
.tok-head { color: var(--syn-key); font-weight: 600; }

/* toast */
#toast {
  position: fixed;
  bottom: 46px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--text);
  color: var(--bg);
  border-radius: 8px;
  padding: 8px 16px;
  font-size: 13px;
  opacity: 0;
  transition: opacity .25s;
  pointer-events: none;
  z-index: 10;
}
#toast.show { opacity: .95; }