.perceptron-steps-page {
  --blue: #245fae;
  --cyan: #298da8;
  --green: #245fae;
  --yellow: #b68016;
  display: block;
  height: auto;
  min-height: 100%;
  padding: 0;
  overflow: visible;
  background: var(--paper);
  font: 15px/1.5 Arial, sans-serif;
}
.perceptron-steps-page .site-header { width: 100%; }
.perceptron-steps-page .lesson-intro { padding: 30px 0 24px; }
.perceptron-steps-page .eyebrow { margin: 0 0 12px; }
.perceptron-steps-page h1 { font: 400 clamp(34px, 4vw, 56px)/1.08 Georgia, serif; letter-spacing: -1.5px; margin: 0 0 14px; }
.perceptron-steps-page h1 em { color: var(--olive); font-weight: 400; }
.perceptron-steps-page .lesson-lead { max-width: 740px; margin: 0; color: var(--muted); font-size: 17px; }
.perceptron-steps-page .simulator { min-width: 0; }
.perceptron-steps-page .top { padding: 14px 16px; border: 1px solid var(--line); border-radius: 14px; background: var(--card); gap: 8px; }
.perceptron-steps-page .simulator-label { font-size: 13px; font-weight: 700; margin-right: 6px; color: var(--olive); }
.perceptron-steps-page .top button { min-height: 42px; padding: 8px 12px; border-radius: 8px; font: 600 13px/1.2 Arial, sans-serif; }
.perceptron-steps-page button.primary { background: var(--olive); border-color: var(--olive); color: #fff; }
.perceptron-steps-page button.primary:hover { background: #194b8d; }
.perceptron-steps-page .bar { height: 4px; margin: 12px 0 16px; background: var(--soft); }
.perceptron-steps-page .bar > div { background: var(--olive); }
.perceptron-steps-page .main { gap: 16px; grid-template-columns: minmax(0,1fr) minmax(0,1.1fr) minmax(0,.9fr); grid-template-rows: 340px 330px; }
.perceptron-steps-page .card { padding: 16px; border-radius: 16px; box-shadow: 0 5px 18px #16385806; }
.perceptron-steps-page .card h2 { font: 700 11px/1.4 Arial, sans-serif; letter-spacing: 1.2px; margin: 0 0 14px; color: var(--olive); }
.perceptron-steps-page .explain .title { font-size: 17px; }
.perceptron-steps-page .explain p { margin: 8px 0; }
.perceptron-steps-page .formula { background: var(--paper); font-size: 13px; padding: 10px; }
.perceptron-steps-page .note { font-size: 13px; border-color: var(--olive); }
.perceptron-steps-page .badge { background: var(--red); color: white; }
.perceptron-steps-page table { font-size: 13px; font-variant-numeric: tabular-nums; }
.perceptron-steps-page th { font-size: 11px; background: var(--paper); }
.perceptron-steps-page th, .perceptron-steps-page td { padding: 8px 5px; }
.perceptron-steps-page .pill.epoch { background: var(--soft); color: var(--olive); }
.perceptron-steps-page #cfgPanel { top: 50px; padding: 16px; border-radius: 14px; }
.perceptron-steps-page .cfg { flex-wrap: wrap; }
.perceptron-steps-page .cfg input { min-height: 40px; width: 68px; font-size: 14px; }
.perceptron-steps-page input:focus-visible { outline: 3px solid var(--olive); outline-offset: 3px; }
.perceptron-steps-page .site-footer { width: 100%; margin-top: 30px; }
.perceptron-steps-page .board-toolbar { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 12px; }
.perceptron-steps-page .board-toolbar button { min-height: 44px; padding: 10px 16px; background: var(--card); border: 1px solid var(--line); color: var(--olive); font: 600 14px/1.3 Arial, sans-serif; }
.perceptron-steps-page .board-hint { color: var(--muted); font-size: 13px; }
html.perceptron-board-open { overflow: hidden; }
.perceptron-steps-page .simulator.is-board { position: fixed; inset: 0; z-index: 10000; width: 100%; max-width: none; height: 100dvh; margin: 0; padding: 16px; background: var(--paper); overflow: auto; display: flex; flex-direction: column; }
.perceptron-steps-page .simulator::backdrop { background: var(--paper); }
.perceptron-steps-page .is-board .board-toolbar { position: sticky; top: -16px; z-index: 10; flex: none; padding-block: 8px; background: var(--paper); }
.perceptron-steps-page .is-board .top, .perceptron-steps-page .is-board .bar { flex-shrink: 0; }
@media (min-width: 1051px) {
  .perceptron-steps-page .is-board .main { flex: 1 0 520px; grid-template-rows: minmax(240px,1fr) minmax(260px,1fr); }
}
@media (max-width: 1050px) {
  .perceptron-steps-page .is-board .main { flex: 0 0 auto; }
  .perceptron-steps-page .main { grid-template-columns: repeat(2,minmax(0,1fr)); grid-template-rows: 340px auto auto; }
  .perceptron-steps-page #cDiagram { grid-area: 1/1/2/3; }
  .perceptron-steps-page #cData { grid-area: 2/1; min-height: 280px; }
  .perceptron-steps-page #cExplain { grid-area: 2/2; min-height: 330px; }
  .perceptron-steps-page #cPlane { grid-area: 3/1; height: 350px; }
  .perceptron-steps-page #cHist { grid-area: 3/2; min-height: 280px; }
  .perceptron-steps-page #explain { overflow: visible; }
}
@media (max-width: 650px) {
  .perceptron-steps-page .wrap { padding-inline: 16px; }
  .perceptron-steps-page .lesson-intro { padding: 24px 0; }
  .perceptron-steps-page .lesson-lead { font-size: 16px; }
  .perceptron-steps-page .top { padding: 12px; gap: 7px; }
  .perceptron-steps-page .simulator-label { width: 100%; }
  .perceptron-steps-page .spacer { display: none; }
  .perceptron-steps-page .hint { width: 100%; }
  .perceptron-steps-page .top button { min-height: 44px; }
  .perceptron-steps-page .main { display: flex; flex-direction: column; gap: 12px; }
  .perceptron-steps-page #cDiagram { min-height: 290px; }
  .perceptron-steps-page #diagram { flex: none; height: auto; aspect-ratio: 640/370; }
  .perceptron-steps-page #cExplain { order: 1; min-height: 0; }
  .perceptron-steps-page #cData { order: 2; min-height: 0; }
  .perceptron-steps-page #cPlane { order: 3; height: 360px; }
  .perceptron-steps-page #cHist { order: 4; min-height: 0; }
  .perceptron-steps-page .card { padding: 14px; }
  .perceptron-steps-page .topright { position: static; }
  .perceptron-steps-page .top { position: relative; }
  .perceptron-steps-page #cfgPanel { top: 100%; left: 0; right: 0; margin-top: 8px; }
  .perceptron-steps-page .site-footer { width: auto; }
}
@media (prefers-reduced-motion: reduce) {
  .perceptron-steps-page *, .perceptron-steps-page *::before, .perceptron-steps-page *::after { animation: none !important; transition: none !important; }
}