:root {
  --bg: #f4f5f7;
  --panel: #ffffff;
  --ink: #1d2330;
  --muted: #5d6677;
  --line: #dde1e8;
  --accent: #1f5fbf;
  --accent-ink: #ffffff;
  --accent-soft: #e8f0fc;
  --warn: #9a5b00;
  --warn-bg: #fff4df;
  --error: #b3261e;
  --radius: 8px;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 14px;
  color: var(--ink);
}
* { box-sizing: border-box; }
[hidden] { display: none !important; }
body { margin: 0; background: var(--bg); min-height: 100vh; }
h1 { font-size: 1.15rem; margin: 0; }
h2 { font-size: 0.95rem; margin: 0 0 0.6rem; }
h3 { font-size: 0.85rem; margin: 0.9rem 0 0.4rem; }
p { margin: 0.3rem 0; line-height: 1.45; }
button, input, select, textarea { font: inherit; color: inherit; }
input, select, textarea {
  border: 1px solid var(--line); border-radius: 6px; padding: 0.3rem 0.45rem; background: #fff;
  min-width: 0;
}
input[type=checkbox], input[type=radio] { padding: 0; }
input[type=number] { width: 100%; }
textarea { width: 100%; font-family: ui-monospace, Menlo, monospace; font-size: 12px; }
button { cursor: pointer; border-radius: 6px; border: 1px solid transparent; padding: 0.4rem 0.75rem; }
button:disabled { opacity: 0.55; cursor: progress; }
.primary { background: var(--accent); color: var(--accent-ink); font-weight: 600; }
.primary:hover:not(:disabled) { filter: brightness(1.08); }
.secondary { background: var(--accent-soft); color: var(--accent); border-color: #c9daf6; }
.secondary:hover { background: #dbe7fa; }
.ghost { background: transparent; border-color: var(--line); }
.ghost:hover { background: #eef0f4; }
.small { padding: 0.2rem 0.5rem; font-size: 0.85rem; }
.hint { color: var(--muted); font-size: 0.82rem; }
.note { color: var(--muted); font-size: 0.82rem; margin-top: 0.6rem; line-height: 1.4; }
.note:empty { display: none; }
.error { color: var(--error); font-size: 0.85rem; white-space: pre-wrap; }
.row { display: flex; align-items: center; flex-wrap: wrap; }
.row.gap { gap: 0.5rem; margin-top: 0.6rem; }
.row.end { justify-content: flex-end; gap: 0.5rem; margin-top: 0.8rem; }

.topbar {
  display: flex; justify-content: space-between; align-items: center; gap: 1rem; flex-wrap: wrap;
  padding: 0.7rem 1rem; background: var(--panel); border-bottom: 1px solid var(--line);
}
.brand p { margin: 0.1rem 0 0; color: var(--muted); font-size: 0.85rem; }
.topbar-actions { display: flex; gap: 0.5rem; align-items: center; flex-wrap: wrap; }
.examples { display: flex; gap: 0.4rem; align-items: center; color: var(--muted); }

.layout {
  display: grid; grid-template-columns: 330px minmax(0, 1fr) 330px; gap: 0.75rem;
  padding: 0.75rem 1rem; align-items: start;
}
.panel { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 0.9rem; }
.controls { display: flex; flex-direction: column; gap: 1.1rem; }
.controls section + section { border-top: 1px solid var(--line); padding-top: 0.9rem; }
.section-head { display: flex; justify-content: space-between; align-items: baseline; }

.layer-card {
  border: 1px solid var(--line); border-left: 5px solid var(--layer-color, #999); border-radius: 6px;
  padding: 0.55rem 0.6rem; margin-bottom: 0.5rem; background: #fcfcfd;
}
.layer-card .head { display: flex; align-items: center; gap: 0.4rem; margin-bottom: 0.45rem; }
.layer-card .head .title { font-weight: 600; flex: 1; font-size: 0.85rem; }
.layer-card .head button { padding: 0.1rem 0.4rem; font-size: 0.8rem; }
.layer-card .grid { display: grid; grid-template-columns: 1fr 1fr; gap: 0.4rem 0.5rem; }
.layer-card .grid label, .fields label, .inline, dialog label { display: flex; flex-direction: column; gap: 0.2rem; font-size: 0.8rem; color: var(--muted); }
.layer-card .full { grid-column: 1 / -1; }
.layer-card .range { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0.3rem; }
.layer-card details summary { cursor: pointer; font-size: 0.78rem; color: var(--muted); margin-top: 0.4rem; }
.layer-card .ref { font-size: 0.8rem; color: var(--muted); align-self: end; padding-bottom: 0.35rem; }

.seg { display: flex; flex-direction: column; gap: 0.3rem; margin-bottom: 0.6rem; }
.seg label { display: flex; gap: 0.4rem; align-items: center; }
.fields { display: grid; grid-template-columns: 1fr 1fr; gap: 0.5rem; margin-bottom: 0.6rem; }
.fields .hint { grid-column: 1 / -1; }
.quick { border: 1px solid var(--line); border-radius: 6px; padding: 0.5rem 0.6rem; margin-bottom: 0.7rem; background: #fafbfc; }
.quick summary { cursor: pointer; font-weight: 600; font-size: 0.85rem; margin-bottom: 0.2rem; }
.quick .fields { margin-top: 0.5rem; }
.span2 { grid-column: 1 / -1; }
label.chk.span2 { flex-direction: row; color: var(--ink); }
.twist-box { border: 1px solid #c9daf6; background: var(--accent-soft); border-radius: 6px; padding: 0.5rem 0.6rem; margin-bottom: 0.7rem; }
.twist-box h3 { margin: 0 0 0.4rem; }
.twist-row { display: flex; gap: 0.4rem; align-items: center; flex-wrap: wrap; }
.twist-row .range { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0.3rem; flex-basis: 100%; }
.inline-num { display: flex; align-items: center; gap: 0.3rem; }
.inline-num input { width: 6rem; }
.linked-note { font-size: 0.78rem; color: var(--accent); align-self: end; padding-bottom: 0.35rem; }
.sym-badges { display: flex; flex-wrap: wrap; gap: 0.3rem; margin: 0.35rem 0 0.5rem; }
.sym-badge { font-size: 0.75rem; padding: 0.15rem 0.45rem; border-radius: 999px; border: 1px solid var(--line); background: #f6f7f9; color: var(--muted); }
.sym-badge.yes { background: #e7f5ec; border-color: #b9e2c7; color: #1c6b3a; }
.sym-badge.no { background: #f6f7f9; color: #7a8190; }
.sym-row { display: grid; grid-template-columns: auto 1fr; gap: 0.15rem 0.6rem; font-size: 0.8rem; margin: 0.3rem 0; }
.sym-row dt { color: var(--muted); }
.sym-row dd { margin: 0; }
.mono-list { font-family: ui-monospace, Menlo, monospace; font-size: 0.75rem; }
.stack-table { width: 100%; border-collapse: collapse; font-variant-numeric: tabular-nums; font-size: 0.8rem; }
.stack-table th { text-align: left; color: var(--muted); font-weight: 500; border-bottom: 1px solid var(--line); padding: 0.2rem 0.25rem; }
.stack-table td { border-bottom: 1px solid #eef0f3; padding: 0.25rem; }
.stack-table td:first-child { border-left: 4px solid var(--layer-color, #999); padding-left: 0.35rem; }
.table-wrap { overflow-x: auto; }
.results details summary { cursor: pointer; }
.matrix { grid-column: 1 / -1; display: grid; grid-template-columns: repeat(2, 5rem); gap: 0.3rem; border-left: 2px solid var(--ink); border-right: 2px solid var(--ink); padding: 0.2rem 0.4rem; width: max-content; border-radius: 4px; }
.info { display: inline-block; width: 1.05em; height: 1.05em; line-height: 1.05em; text-align: center; border-radius: 50%; background: var(--line); color: var(--muted); font-size: 0.7rem; cursor: help; }

.status { font-size: 0.85rem; min-height: 1.2em; }
.status.error { color: var(--error); }
.status.busy::before { content: ""; display: inline-block; width: 0.8em; height: 0.8em; margin-right: 0.4em; border: 2px solid var(--accent); border-right-color: transparent; border-radius: 50%; animation: spin 0.8s linear infinite; vertical-align: -0.1em; }
@keyframes spin { to { transform: rotate(360deg); } }

.viewer-area { display: flex; flex-direction: column; background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
.view-toolbar { display: flex; justify-content: space-between; align-items: center; gap: 0.5rem; flex-wrap: wrap; padding: 0.5rem 0.6rem; border-bottom: 1px solid var(--line); }
.tabs { display: flex; gap: 0.25rem; }
.tab { background: transparent; border-color: var(--line); }
.tab.active { background: var(--ink); color: #fff; border-color: var(--ink); }
.view-opts { display: flex; gap: 0.7rem; align-items: center; flex-wrap: wrap; font-size: 0.82rem; color: var(--muted); }
.view-opts label { display: flex; gap: 0.3rem; align-items: center; }
.view-opts input[type=range] { width: 5.5rem; }
.view3d-opts { display: flex; gap: 0.35rem; align-items: center; }
.chk { display: flex; gap: 0.25rem; align-items: center; }
.layer-toggles { display: flex; gap: 0.4rem; flex-wrap: wrap; padding: 0.4rem 0.6rem; border-bottom: 1px solid var(--line); font-size: 0.8rem; }
.layer-toggles:empty { display: none; }
.layer-toggles label { display: flex; gap: 0.3rem; align-items: center; padding: 0.15rem 0.45rem; border: 1px solid var(--line); border-radius: 999px; }
.swatch { display: inline-block; width: 0.8em; height: 0.8em; border-radius: 50%; }
.viewport { position: relative; height: min(68vh, 720px); min-height: 380px; background: #fff; }
.view { position: absolute; inset: 0; width: 100%; height: 100%; }
.empty { position: absolute; inset: 0; display: grid; place-items: center; color: var(--muted); text-align: center; padding: 1rem; }
.export-bar { display: flex; justify-content: space-between; gap: 0.75rem; flex-wrap: wrap; padding: 0.55rem 0.6rem; border-top: 1px solid var(--line); font-size: 0.82rem; color: var(--muted); }
.export-group { display: flex; gap: 0.4rem; align-items: center; flex-wrap: wrap; }
.export-group .label { font-weight: 600; color: var(--ink); }

.results { font-size: 0.85rem; }
.stats { display: grid; grid-template-columns: 1fr 1fr; gap: 0.4rem; }
.stat { background: var(--bg); border-radius: 6px; padding: 0.4rem 0.5rem; }
.stat .k { color: var(--muted); font-size: 0.75rem; }
.stat .v { font-weight: 600; font-variant-numeric: tabular-nums; }
.warn { background: var(--warn-bg); color: var(--warn); border-radius: 6px; padding: 0.45rem 0.55rem; margin: 0.6rem 0; font-size: 0.8rem; line-height: 1.4; }
.layer-result { border-left: 4px solid var(--layer-color, #999); padding: 0.3rem 0 0.3rem 0.55rem; margin: 0.5rem 0; }
.layer-result .name { font-weight: 600; }
.kv { display: grid; grid-template-columns: auto 1fr; gap: 0.1rem 0.6rem; font-variant-numeric: tabular-nums; }
.kv dt { color: var(--muted); }
.kv dd { margin: 0; }
.tensor { display: inline-grid; grid-template-columns: auto auto; gap: 0 0.7rem; border-left: 1.5px solid var(--ink); border-right: 1.5px solid var(--ink); padding: 0 0.3rem; font-family: ui-monospace, Menlo, monospace; font-size: 0.75rem; border-radius: 3px; }
code, .mono { font-family: ui-monospace, Menlo, monospace; font-size: 0.8rem; }

dialog { border: none; border-radius: 10px; padding: 1.1rem 1.2rem; width: min(560px, calc(100vw - 2rem)); box-shadow: 0 12px 40px rgba(0,0,0,0.25); }
dialog.wide { width: min(1100px, calc(100vw - 2rem)); }
.db-filters { display: flex; flex-wrap: wrap; gap: 0.5rem 0.7rem; align-items: end; }
.db-filters label { min-width: 7rem; }
.db-filters .grow { flex: 1 1 16rem; }
.db-filters input[type=number] { width: 5rem; }
.db-sources { display: flex; gap: 0.6rem; flex-wrap: wrap; font-size: 0.8rem; flex-basis: 100%; }
.db-sources label { flex-direction: row; min-width: 0; color: var(--ink); align-items: center; gap: 0.3rem; }
.db-results { max-height: 50vh; overflow: auto; border: 1px solid var(--line); border-radius: 6px; }
.db-results thead th { position: sticky; top: 0; background: #fff; }
.db-results tbody tr:hover { background: var(--accent-soft); }
.db-results td { white-space: nowrap; }
.db-results td:first-child { border-left: none; }
.badge { font-size: 0.7rem; padding: 0.05rem 0.35rem; border-radius: 4px; background: #eef0f4; color: var(--muted); margin-left: 0.3rem; }
dialog::backdrop { background: rgba(20, 24, 33, 0.45); }
dialog form { display: flex; flex-direction: column; gap: 0.6rem; }

@media (max-width: 1250px) {
  .layout { grid-template-columns: 320px minmax(0, 1fr); }
  .results { grid-column: 1 / -1; }
}
@media (max-width: 800px) {
  .layout { grid-template-columns: 1fr; padding: 0.5rem; }
  .viewport { height: 60vh; }
}