/* Classifier Explorer styles (shared by the SVM, Naive Bayes and XGBoost tabs) */
  :root {
    --bg: #ffffff; --fg: #2C2C2A; --muted: #5F5E5A; --line: #D3D1C7;
    --panel: #F7F6F2; --accent: #2C2C2A; --btn-on-bg: #2C2C2A; --btn-on-fg: #ffffff;
    --logo: #185FA5;
  }
  :root[data-theme="dark"] {
    --bg: #000000; --fg: #F1EFE8; --muted: #B4B2A9; --line: #444441;
    --panel: #121211; --accent: #F1EFE8; --btn-on-bg: #F1EFE8; --btn-on-fg: #000000;
    --logo: #85B7EB;
  }
  * { box-sizing: border-box; }
  html, body { margin: 0; background: var(--bg); color: var(--fg); }
  body { font-family: "Times New Roman", Times, serif; font-size: 17px; line-height: 1.5; }
  .stat b, .slider span { font-variant-numeric: tabular-nums; }
  .wrap { max-width: 1180px; margin: 0 auto; padding: 10px 16px 16px; }
  /* desktop: logo bottom-left (level with the formula), titles centred, toggle top-right */
  header { display: grid; grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr); grid-template-areas: "brand titles theme";
           align-items: end; text-align: center; margin-bottom: 8px; column-gap: 16px; }
  .brand { grid-area: brand; justify-self: start; align-self: end; margin-bottom: 4px; }
  .titles { grid-area: titles; }
  #theme { grid-area: theme; justify-self: end; align-self: start; }
  @media (max-width: 820px) {
    header { grid-template-columns: 1fr auto; grid-template-areas: "brand theme" "titles titles"; align-items: center; row-gap: 8px; }
    #theme { align-self: center; }
  }
  .brand { display: block; color: var(--logo); line-height: 0; }
  .logo { height: 84px; width: auto; display: block; }   /* centred on the title block; widest that keeps the heading centred */
  @media (max-width: 820px) { .logo { height: 54px; } .brand { align-self: center; } }
  .app-title { font-size: 21px; font-weight: 400; font-variant: small-caps; letter-spacing: 0.08em; color: var(--muted); margin: 0 0 2px; }
  .kernel { font-weight: 700; font-size: 34px; margin: 0; line-height: 1.25; }
  .sub { color: var(--muted); font-size: 18px; }
  .formula { font-size: 20px; margin-top: 2px; min-height: 30px; }
  .layout { display: grid; grid-template-columns: minmax(0, 1fr) 300px; grid-template-areas: "stage aside" "byline controls";
             column-gap: 20px; row-gap: 0; margin-top: 12px; align-items: stretch; }
  #stage { grid-area: stage; }
  aside { grid-area: aside; padding-bottom: 14px; }
  .controls { grid-area: controls; }
  #param-slot { display: flow-root; min-height: 70px; }
  @media (max-width: 820px) { .layout { grid-template-columns: minmax(0, 1fr); grid-template-areas: "stage" "aside" "controls" "byline"; row-gap: 16px; } .kernel { font-size: 27px; } }
  #stage { position: relative; min-height: 420px; border-radius: 0; background: transparent; border: 1px solid var(--line);
           cursor: grab; touch-action: none; overflow: hidden; }
  #stage:active { cursor: grabbing; }
  #stage canvas { position: absolute; inset: 0; width: 100% !important; height: 100% !important; display: block; }
  .hint { position: absolute; left: 14px; bottom: 10px; font-size: 14px; color: var(--muted); pointer-events: none; }
  aside { display: flex; flex-direction: column; gap: 12px; }
  .group { border-top: 1px solid var(--line); padding-top: 12px; }
  .group:first-child { border-top: 0; padding-top: 0; }
  .label { font-size: 14px; color: var(--muted); margin-bottom: 6px; }
  .seg { display: flex; flex-wrap: wrap; gap: 6px; }
  button { font: inherit; font-size: 15px; color: var(--fg); background: transparent; border: 1px solid var(--line);
           border-radius: 8px; padding: 5px 11px; cursor: pointer; }
  button:hover { border-color: var(--fg); }
  button.on { background: var(--btn-on-bg); color: var(--btn-on-fg); border-color: var(--btn-on-bg); }
  .slider { display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 8px; margin-top: 8px; }
  .slider span { font-size: 15px; min-width: 64px; text-align: right; font-variant-numeric: tabular-nums; }
  input[type=range] { width: 100%; accent-color: var(--accent); grid-column: 1 / -1; }
  .stats { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
  .stat { background: transparent; border: 1px solid var(--line); border-radius: 0; padding: 8px 12px; }
  .stat b { display: block; font-weight: 500; font-size: 22px; }
  .legend div { display: flex; align-items: center; gap: 8px; font-size: 15px; margin: 3px 0; }
  .dot { width: 12px; height: 12px; border-radius: 50%; flex: none; }
  .bar { width: 18px; height: 3px; background: var(--fg); flex: none; }
  .row { display: flex; gap: 6px; flex-wrap: wrap; }
  @media (max-width: 820px) { #stage { height: auto; aspect-ratio: 1 / 1; min-height: 0; } }

/* references footer: compact so it shows on first view at 100% zoom */
.refs { margin-top: 16px; padding-top: 8px; border-top: 1px solid var(--line); color: var(--muted); font-size: 12.5px; }
.refs h2 { font-size: 13px; font-weight: 700; color: var(--fg); margin: 0 0 2px; }
.byline { grid-area: byline; align-self: end; padding-bottom: 7px; font-size: 15px; color: var(--fg); }
.byline strong { font-weight: 700; }
.byline .sep { color: var(--line); margin: 0 10px; }
@media (max-width: 600px) {
  .byline { display: flex; flex-direction: column; gap: 2px; padding-bottom: 0; }
  .byline .sep { display: none; }
}
.byline a { color: var(--logo); text-decoration: none; font-weight: 700; }
.byline a:hover { text-decoration: underline; }
.refs ol { margin: 0; padding-left: 18px; }
.refs li { margin: 1px 0; line-height: 1.35; }
.refs a { color: var(--muted); }
.refs a:hover { color: var(--fg); }

/* model family tabs, centred under the header */
.family-tabs { display: flex; justify-content: center; flex-wrap: wrap; gap: 8px; margin: 2px 0 6px; }
.family-tabs button { font-size: 16px; padding: 6px 16px; }
@media (max-width: 600px) { .family-tabs button { font-size: 14px; padding: 5px 10px; } }

/* keep the page still when switching tabs: always reserve the scrollbar's space,
   so the layout does not jump sideways when the page height changes */
html { scrollbar-gutter: stable; overflow-y: scroll; }
#title { display: flex; align-items: center; justify-content: center; }
#formula { display: flex; align-items: center; justify-content: center; }
#kn { align-content: flex-start; }