.method-demo {
  --method-ink: var(--ink, #152d35);
  --method-muted: var(--muted, #607375);
  --method-accent: var(--accent, #057f7a);
  --method-paper: var(--paper, #f8f9f5);
  --method-rule: #d9e3dd;
  color: var(--method-ink);
  background: #fcfdf9;
  border: 1px solid var(--method-rule);
  border-radius: 4px;
  overflow: hidden;
  isolation: isolate;
}

.method-demo *,
.method-demo *::before,
.method-demo *::after { box-sizing: border-box; }

.method-demo button,
.method-demo input { font: inherit; }

.method-demo button {
  appearance: none;
  color: inherit;
  cursor: pointer;
  background: none;
  border: 0;
}

.method-demo button:focus-visible,
.method-demo input:focus-visible {
  outline: 2px solid var(--method-accent);
  outline-offset: 5px;
}

.method-demo button:disabled { cursor: default; opacity: .29; }

.method-demo__topline {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  padding: 19px 28px;
  background: #f2f6f1;
  border-bottom: 1px solid var(--method-rule);
  font-size: 11px;
  letter-spacing: .035em;
}

.method-demo__label { display: inline-flex; gap: 9px; align-items: center; font-weight: 650; }
.method-demo__label i { width: 7px; height: 7px; border: 1px solid var(--method-accent); transform: rotate(45deg); }
.method-demo__source { color: var(--method-muted); }

.method-demo__stages {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  padding: 0 28px;
  border-bottom: 1px solid var(--method-rule);
}

.method-demo__stages button {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  padding: 18px 5px;
  font-size: 12px;
  color: var(--method-muted);
  white-space: nowrap;
}

.method-demo__stages button::after {
  content: '';
  position: absolute;
  bottom: -1px;
  height: 2px;
  left: 13px;
  right: 13px;
  background: transparent;
  transition: background-color 160ms ease;
}

.method-demo__stages button:hover { color: var(--method-ink); }
.method-demo__stages button.is-active { color: var(--method-accent); font-weight: 650; }
.method-demo__stages button.is-active::after { background: var(--method-accent); }
.method-demo__stage-number { font-size: 10px; font-variant-numeric: tabular-nums; opacity: .75; }

.method-demo__body {
  display: grid;
  grid-template-columns: minmax(0, 1.38fr) minmax(275px, 1fr);
  align-items: stretch;
}

.method-demo__figure {
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-width: 0;
  margin: 0;
  padding: 14px 5px 25px;
  background: radial-gradient(ellipse at 48% 45%, #fff 10%, #fafcf7 78%);
  border-right: 1px solid var(--method-rule);
}

.method-demo__drawing { display: flex; align-items: center; justify-content: center; }
.method-demo .method-diagram { display: block; width: 100%; max-width: 620px; height: auto; overflow: visible; }
.method-demo .method-diagram text { font-family: inherit; }
.method-demo .method-svg-eyebrow { font-size: 9px; letter-spacing: 1.3px; fill: #71817e; }
.method-demo .method-svg-group { font-family: Georgia, serif; font-size: 18px; font-style: italic; fill: var(--method-ink); }
.method-demo .method-svg-grid { fill: none; stroke: #dbe5df; stroke-width: .75; }
.method-demo .method-svg-mirrors { fill: none; stroke: #057f7a; stroke-width: 1.2; stroke-dasharray: 6 6; }
.method-demo .method-svg-cell { fill: none; stroke: #748983; stroke-width: 1.3; }
.method-demo .method-svg-axis-labels { fill: #71817e; font-size: 10px; }
.method-demo .method-svg-four { font-family: Georgia, serif; font-size: 17px; fill: #057f7a; }
.method-demo .method-svg-mirror-label { font-family: Georgia, serif; font-style: italic; font-size: 16px; fill: #057f7a; }
.method-demo .method-svg-site-label { font-size: 11px; font-weight: 650; }
.method-demo .method-svg-domain-labels { font-family: Georgia, serif; font-style: italic; font-size: 16px; }
.method-demo .method-svg-dimensions { fill: #607375; color: #9aaca3; stroke: #9aaca3; stroke-width: .8; }
.method-demo .method-svg-dimensions text { stroke: none; font-family: Georgia, serif; font-style: italic; font-size: 14px; }
.method-demo .method-svg-levels { fill: #607375; font-size: 7px; letter-spacing: 1px; }
.method-demo .method-svg-level-count { font-size: 11px; letter-spacing: 0; font-variant-numeric: tabular-nums; }

.method-demo__caption {
  max-width: 410px;
  min-height: 36px;
  margin: -6px auto 0;
  padding: 0 25px;
  color: var(--method-muted);
  text-align: center;
  font-size: 11px;
  line-height: 1.6;
  text-wrap: pretty;
}

.method-demo__narrative { padding: 34px 32px 26px; display: flex; flex-direction: column; justify-content: space-between; gap: 25px; }
.method-demo__explanation { min-height: 250px; }
.method-demo__stage-title { margin: 0 0 12px; color: var(--method-accent); font-size: 10px; font-weight: 650; letter-spacing: .09em; text-transform: uppercase; }
.method-demo .method-demo__title { margin: 0 0 14px; max-width: 340px; font-family: Georgia, 'Times New Roman', serif; font-weight: 400; font-size: clamp(24px, 2.3vw, 32px); letter-spacing: -.025em; line-height: 1.12; text-wrap: balance; }
.method-demo__description { min-height: 94px; margin: 0; color: var(--method-muted); font-size: 12px; line-height: 1.75; text-wrap: pretty; }
.method-demo__equation { margin: 18px 0 8px; padding-top: 15px; border-top: 1px solid var(--method-rule); font-family: Georgia, 'Times New Roman', serif; font-style: italic; font-size: 14px; line-height: 1.5; }
.method-demo__detail { margin: 0; min-height: 30px; color: var(--method-muted); font-size: 10px; line-height: 1.55; }

.method-demo__legend-title { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 6px; margin: 0 0 13px; color: var(--method-ink); font-size: 9px; font-weight: 650; letter-spacing: .09em; }
.method-demo__legend-title span { color: var(--method-muted); font-size: 9px; font-weight: 400; letter-spacing: 0; text-transform: none; }
.method-demo__legend-row { display: flex; align-items: center; gap: 10px; padding: 7px 0; border-top: 1px solid #e6ece6; }
.method-demo__site-symbol { flex: 0 0 24px; width: 24px; height: 24px; border: 1px solid currentColor; border-radius: 50%; display: inline-flex; align-items: center; justify-content: center; font-size: 9px; font-weight: 650; }
.method-demo__site-symbol--fixed { color: #243f56; background: #edf0f2; }
.method-demo__site-symbol--line { color: #a85233; background: #f7ede6; }
.method-demo__site-symbol--diagonal { color: #927521; background: #f5f1e4; }
.method-demo__site-symbol--plane { color: #057f7a; background: #e9f2ed; }
.method-demo__site-name { font-size: 11px; line-height: 1.25; }
.method-demo__site-name small { display: block; color: var(--method-muted); font-size: 9px; margin-top: 3px; }
.method-demo__site-form { margin-left: auto; font-family: Georgia, 'Times New Roman', serif; font-size: 13px; font-style: italic; white-space: nowrap; }
.method-demo__legend-note { margin: 11px 0 0; color: var(--method-muted); font-size: 9px; line-height: 1.5; }

.method-demo__player { display: grid; grid-template-columns: auto minmax(0, 1fr); align-items: center; gap: 31px; padding: 21px 28px 18px; background: #f2f6f1; border-top: 1px solid var(--method-rule); }
.method-demo__buttons { display: flex; align-items: center; gap: 7px; }
.method-demo__buttons button { display: inline-flex; justify-content: center; align-items: center; gap: 6px; min-height: 36px; padding: 0; font-size: 11px; }
.method-demo__buttons button svg { width: 17px; height: 17px; }
.method-demo__buttons .method-demo__play { min-width: 83px; padding: 0 12px; color: #fff; background: var(--method-accent); border-radius: 2px; }
.method-demo__buttons .method-demo__play:hover { background: #086862; }
.method-demo__buttons .method-demo__icon-button { width: 31px; }
.method-demo__buttons .method-demo__icon-button:not(:disabled):hover,
.method-demo__buttons .method-demo__reset:not(:disabled):hover { color: var(--method-accent); }
.method-demo__buttons .method-demo__reset { margin-left: 5px; padding-left: 13px; border-left: 1px solid var(--method-rule); }
.method-demo__buttons .method-demo__reset svg { width: 14px; height: 14px; }
.method-demo__scrubber { min-width: 0; }
.method-demo__scrubber-heading { display: flex; align-items: center; justify-content: space-between; gap: 10px; margin-bottom: 7px; font-size: 10px; }
.method-demo__step-count { color: var(--method-muted); font-size: 10px; font-variant-numeric: tabular-nums; }
.method-demo__scrubber input { appearance: none; display: block; width: 100%; height: 4px; margin: 9px 0; padding: 0; border: 0; border-radius: 0; background: linear-gradient(to right, var(--method-accent) 0%, var(--method-accent) var(--method-progress, 0%), #cdd9d1 var(--method-progress, 0%), #cdd9d1 100%); cursor: pointer; accent-color: var(--method-accent); }
.method-demo__scrubber input::-webkit-slider-thumb { appearance: none; width: 13px; height: 13px; border-radius: 50%; border: 3px solid #fff; background: var(--method-accent); box-shadow: 0 0 0 1px var(--method-accent); }
.method-demo__scrubber input::-moz-range-thumb { width: 8px; height: 8px; border-radius: 50%; border: 3px solid #fff; background: var(--method-accent); box-shadow: 0 0 0 1px var(--method-accent); }
.method-demo__scrubber-labels { display: flex; justify-content: space-between; color: var(--method-muted); font-size: 8px; letter-spacing: .03em; }
.method-demo__footnote { margin: 0; padding: 12px 28px 14px; color: var(--method-muted); font-size: 9px; line-height: 1.6; background: #f2f6f1; border-top: 1px solid #e5ece4; }

@media (max-width: 900px) {
  .method-demo__stages { padding: 0 12px; }
  .method-demo__stages button { font-size: 11px; gap: 5px; }
  .method-demo__body { grid-template-columns: minmax(0, 1.2fr) minmax(240px, 1fr); }
  .method-demo__narrative { padding: 26px 22px 24px; gap: 16px; }
  .method-demo__description { font-size: 11px; }
  .method-demo__explanation { min-height: 255px; }
  .method-demo__player { gap: 20px; padding-inline: 22px; }
}

@media (max-width: 660px) {
  .method-demo__topline { padding: 15px 16px; font-size: 9px; gap: 7px; }
  .method-demo__label { gap: 7px; }
  .method-demo__label i { width: 6px; height: 6px; }
  .method-demo__source { font-size: 9px; }
  .method-demo__stages { padding: 0 8px; }
  .method-demo__stages button { flex-direction: column; gap: 4px; padding: 13px 2px 12px; font-size: 9px; }
  .method-demo__stage-number { font-size: 8px; }
  .method-demo__stages button::after { left: 5px; right: 5px; }
  .method-demo__body { display: flex; flex-direction: column; }
  .method-demo__figure { padding: 11px 0 18px; border-right: 0; border-bottom: 1px solid var(--method-rule); }
  .method-demo .method-diagram { max-width: 500px; }
  .method-demo__caption { max-width: 370px; min-height: 36px; margin-top: -3px; font-size: 10px; }
  .method-demo__narrative { padding: 24px 22px; gap: 24px; }
  .method-demo__explanation { min-height: 220px; }
  .method-demo .method-demo__title { max-width: none; font-size: 28px; }
  .method-demo__description { min-height: 62px; font-size: 12px; line-height: 1.7; }
  .method-demo__equation { margin-top: 15px; font-size: 14px; }
  .method-demo__detail { min-height: 15px; }
  .method-demo__legend-row { padding: 8px 0; }
  .method-demo__site-name { font-size: 12px; }
  .method-demo__site-name small { font-size: 10px; }
  .method-demo__legend-note { font-size: 10px; }
  .method-demo__player { grid-template-columns: 1fr; gap: 18px; padding: 20px 22px; }
  .method-demo__buttons { justify-content: center; gap: 12px; }
  .method-demo__buttons .method-demo__play { min-width: 90px; }
  .method-demo__buttons .method-demo__reset { padding-left: 18px; margin-left: 7px; }
  .method-demo__scrubber-heading { font-size: 11px; }
  .method-demo__scrubber-labels { font-size: 9px; }
  .method-demo__footnote { padding: 12px 22px; font-size: 9px; }
}

@media (prefers-reduced-motion: reduce) {
  .method-demo *, .method-demo *::before, .method-demo *::after { transition: none !important; animation: none !important; scroll-behavior: auto !important; }
}