/* ── shared sx-explorer widget ── */
.sx-explorer{
  --sx-fill:  var(--md-accent-fg-color, #58a6ff);
  --sx-edge:  var(--md-default-fg-color--lighter, rgba(127,127,127,.45));
  --sx-text:  var(--md-default-fg-color, currentColor);
  --sx-muted: var(--md-default-fg-color--light, rgba(127,127,127,.85));
  --sx-cell:  var(--md-default-fg-color--lightest, rgba(127,127,127,.12));
  border: 1px solid var(--sx-edge);
  border-radius: 8px;
  padding: 1rem 1rem 1.1rem;
  margin: 1.25rem 0;
  background: var(--md-default-bg-color, transparent);
  /* allow widget to shrink inside flex/grid layouts (sidebar + content) */
  min-width: 0;
  max-width: 100%;
  overflow: hidden;
}
.sx-explorer .sx-buttons{ display:flex; flex-wrap:wrap; gap:.4rem; margin-bottom:1rem; }
.sx-explorer .sx-btn{
  font: inherit; font-size:.72rem; letter-spacing:.04em;
  background:transparent; color: var(--sx-muted);
  border:1px solid var(--sx-edge); border-radius:999px;
  padding:.32em .8em; cursor:pointer;
  transition: background .15s, color .15s, border-color .15s;
  white-space: nowrap;
}
.sx-explorer .sx-btn:hover{ color:var(--sx-text); border-color:var(--sx-text); }
.sx-explorer .sx-btn[aria-pressed="true"]{
  background: var(--sx-fill);
  color: var(--md-accent-bg-color, var(--md-default-bg-color, #fff));
  border-color: transparent;
}

.sx-explorer .sx-stage{ margin: .3rem 0 1rem; min-width: 0; }
.sx-explorer .sx-stage-grid{
  display:grid;
  grid-template-columns: minmax(0,1fr) minmax(0,1fr);
  gap:.6rem; margin-bottom:.4rem;
}
.sx-explorer .sx-stage-grid > *{ min-width: 0; }
@media (max-width:540px){
  .sx-explorer .sx-stage-grid{ grid-template-columns: minmax(0,1fr); }
}
.sx-explorer .sx-sublabel{
  font-family: var(--md-code-font-family, ui-monospace, monospace);
  font-size:.6rem; letter-spacing:.12em; text-transform:uppercase;
  color: var(--sx-muted);
  margin: .55rem 0 .25rem;
}
.sx-explorer .sx-table-wrap{ overflow-x:auto; }
.sx-explorer table.sx-tbl{
  border-collapse: collapse;
  width: auto; max-width: 100%;
  font-family: var(--md-code-font-family, ui-monospace, monospace);
  font-size: .66rem;
  line-height: 1.3;
}
.sx-explorer table.sx-tbl th,
.sx-explorer table.sx-tbl td{
  border: 1px solid var(--sx-edge);
  padding: .18rem .45rem;
  text-align: left;
  color: var(--sx-text);
  white-space: nowrap;
}
.sx-explorer table.sx-tbl th{
  background: var(--sx-cell);
  font-weight: 600; color: var(--sx-muted);
  font-size: .56rem; letter-spacing:.06em; text-transform:uppercase;
  padding: .14rem .45rem;
}
.sx-explorer table.sx-tbl tr.sx-match td{
  background: color-mix(in srgb, var(--sx-fill) 16%, transparent);
}
.sx-explorer table.sx-tbl td.sx-hl,
.sx-explorer table.sx-tbl th.sx-hl{
  background: color-mix(in srgb, var(--sx-fill) 22%, transparent);
}
.sx-explorer .sx-arrow{
  text-align:center; color: var(--sx-muted);
  font-size: 1.2rem; line-height:1; margin: .25rem 0 .15rem;
}
.sx-explorer .sx-null{ color: var(--sx-muted); font-style: italic; }

/* code stage (used by SQL optimization before/after) */
.sx-explorer .sx-code{
  margin: 0;
  background: var(--md-code-bg-color, rgba(127,127,127,.12));
  color: var(--md-code-fg-color, var(--sx-text));
  padding: .55rem .7rem; border-radius: 6px;
  font-family: var(--md-code-font-family, ui-monospace, monospace);
  font-size: .72rem; line-height: 1.5;
  overflow-x: auto;
  white-space: pre;
}
.sx-explorer .sx-code.sx-code-bad{
  border-left: 3px solid #d85a30;
}
.sx-explorer .sx-code.sx-code-good{
  border-left: 3px solid #1d9e75;
}

.sx-explorer .sx-meta{ margin-top: 1rem; }
.sx-explorer .sx-name{
  font-weight: 600; font-size: .95rem; color: var(--sx-text);
  display:flex; align-items:center; gap:.55em; flex-wrap:wrap;
}
.sx-explorer .sx-level{
  font-family: var(--md-code-font-family, ui-monospace, monospace);
  font-size: .58rem; font-weight: 600;
  letter-spacing: .1em; text-transform: uppercase;
  padding: .25em .6em; border-radius: 999px;
  border: 1px solid currentColor; line-height: 1;
}
.sx-explorer .sx-level[data-level="beginner"]    { color:#1d9e75; }
.sx-explorer .sx-level[data-level="intermediate"]{ color:#c97f0a; }
.sx-explorer .sx-level[data-level="advanced"]    { color:#d85a30; }
.sx-explorer .sx-tag{
  font-family: var(--md-code-font-family, ui-monospace, monospace);
  font-size: .72rem; color: var(--sx-muted); margin-top: .15rem;
}
.sx-explorer .sx-desc{ margin-top:.55rem; font-size:.88rem; color: var(--sx-text); line-height:1.55; }
.sx-explorer .sx-sql{
  margin-top:.7rem;
  background: var(--md-code-bg-color, rgba(127,127,127,.12));
  color: var(--md-code-fg-color, var(--sx-text));
  padding: .7rem .85rem; border-radius: 6px;
  font-family: var(--md-code-font-family, ui-monospace, monospace);
  font-size: .78rem; line-height: 1.5;
  overflow-x: auto;
}
.sx-explorer .sx-sql code{ background:none; padding:0; font:inherit; color:inherit; }

/* mermaid: constrain size + center */
.mermaid{
  max-width: 560px;
  margin: 1.25rem auto;
  text-align: center;
}
.mermaid svg{
  max-width: 100% !important;
  height: auto !important;
}

/* ── chart picker (chart-selection page) ── */
.sx-explorer .sx-chart-grid{
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: .6rem;
}
.sx-explorer .sx-chart-card{
  border: 1px solid var(--sx-edge);
  border-radius: 6px;
  padding: .7rem .75rem .8rem;
  background: var(--sx-cell);
  display: flex; flex-direction: column; gap: .35rem;
}
.sx-explorer .sx-chart-card svg{
  width: 100%; height: 50px;
  display: block;
}
.sx-explorer .sx-chart-card .cc-name{
  font-weight: 600; font-size: .78rem;
  color: var(--sx-text);
  letter-spacing: .01em;
}
.sx-explorer .sx-chart-card .cc-when{
  font-size: .72rem; color: var(--sx-text); line-height: 1.4;
}
.sx-explorer .sx-chart-card .cc-not{
  font-size: .68rem; color: var(--sx-muted);
  font-style: italic;
}
.sx-explorer .sx-chart-card .cc-bar  { fill: var(--sx-fill); opacity: .75; }
.sx-explorer .sx-chart-card .cc-line { fill: none; stroke: var(--sx-fill); stroke-width: 2; }
.sx-explorer .sx-chart-card .cc-area { fill: var(--sx-fill); opacity: .35; }
.sx-explorer .sx-chart-card .cc-axis { stroke: var(--sx-edge); stroke-width: 1; }
.sx-explorer .sx-chart-card .cc-dot  { fill: var(--sx-fill); }
.sx-explorer .sx-chart-card .cc-slice{ stroke: var(--md-default-bg-color, #fff); stroke-width: 1.5; }