.fee-lab,
.fee-education-lab {
  --fee-gold: var(--gold, #c9a96e);
  --fee-red: var(--accent, #b94a3b);
  --fee-teal: #6da7a0;
  --fee-purple: #9b85c4;
  position: relative;
  width: min(1120px, calc(100vw - 40px));
  margin: 72px 50%;
  translate: -50% 0;
  color: var(--text);
  font-family: var(--sans);
}

.fee-lab * ,
.fee-education-lab * { box-sizing: border-box; }

.fee-lab-shell,
.fee-education-shell {
  overflow: hidden;
  border: 1px solid var(--line);
  background:
    linear-gradient(135deg, color-mix(in srgb, var(--surface) 96%, transparent), color-mix(in srgb, var(--bg) 88%, transparent));
  box-shadow: 0 30px 90px var(--shadow);
}

.fee-lab-head {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, .72fr);
  gap: 34px;
  padding: clamp(26px, 4vw, 48px);
  border-bottom: 1px solid var(--line);
}

.fee-kicker,
.fee-mini-label {
  margin: 0 0 12px !important;
  color: var(--fee-gold);
  font: 600 12px/1.3 var(--sans) !important;
  letter-spacing: .16em;
  text-transform: uppercase;
}

.article-body .fee-lab h3,
.article-body .fee-education-lab h3 {
  margin: 0;
  color: var(--text);
  font: 500 clamp(26px, 3.8vw, 46px)/1.08 var(--serif);
  letter-spacing: -.025em;
}

.fee-lab-head > div > p:last-child,
.fee-education-intro p {
  max-width: 680px;
  margin: 18px 0 0 !important;
  color: var(--muted);
  font: 400 15px/1.8 var(--sans) !important;
}

.fee-equation {
  align-self: stretch;
  display: grid;
  place-items: center;
  min-height: 150px;
  padding: 24px;
  border: 1px solid color-mix(in srgb, var(--fee-gold) 38%, var(--line));
  background: color-mix(in srgb, var(--bg) 62%, transparent);
  text-align: center;
}

.fee-equation span {
  display: block;
  color: var(--muted);
  font-size: 14px;
}

.fee-equation b {
  display: block;
  margin: 10px 0;
  color: var(--fee-red);
  font: 500 clamp(30px, 4vw, 50px)/1 var(--serif);
}

.fee-stat-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-bottom: 1px solid var(--line);
}

.fee-stat-strip > div {
  min-width: 0;
  padding: 22px clamp(16px, 3vw, 28px);
  border-right: 1px solid var(--line);
}

.fee-stat-strip > div:last-child { border-right: 0; }
.fee-stat-strip strong { display: block; color: var(--text); font: 500 28px/1 var(--serif); }
.fee-stat-strip span { display: block; margin-top: 8px; color: var(--muted); font-size: 12px; line-height: 1.45; }

.fee-protocol {
  display: flex;
  flex-wrap: wrap;
  gap: 0;
  padding: 0 clamp(22px, 4vw, 48px);
  border-bottom: 1px solid var(--line);
}

.fee-protocol span {
  padding: 14px 18px 14px 0;
  margin-right: 18px;
  color: var(--muted);
  font-size: 11px;
  letter-spacing: .06em;
  white-space: nowrap;
}

.fee-protocol span::before { content: "·"; margin-right: 10px; color: var(--fee-gold); }

.fee-env-tabs,
.fee-metric-tabs,
.fee-policy-tabs {
  display: grid;
  gap: 1px;
  padding: clamp(22px, 4vw, 40px) clamp(22px, 4vw, 48px) 0;
}

.fee-env-tabs { grid-template-columns: repeat(4, 1fr); }
.fee-metric-tabs { grid-template-columns: repeat(3, minmax(0, 1fr)); padding: 0; }
.fee-policy-tabs { grid-template-columns: repeat(3, 1fr); padding: 0; }

.fee-lab button,
.fee-education-lab button {
  appearance: none;
  min-height: 52px;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: 0;
  background: color-mix(in srgb, var(--surface) 82%, transparent);
  color: var(--muted);
  font: 500 13px/1.35 var(--sans);
  cursor: pointer;
  transition: background .18s ease, color .18s ease, border-color .18s ease;
}

.fee-lab button:hover,
.fee-education-lab button:hover,
.fee-lab button:focus-visible,
.fee-education-lab button:focus-visible { color: var(--text); border-color: var(--fee-gold); outline: none; }

.fee-lab button[aria-selected="true"],
.fee-education-lab button[aria-selected="true"] {
  color: var(--text);
  border-color: var(--fee-gold);
  background: color-mix(in srgb, var(--fee-gold) 13%, var(--surface));
}

.fee-env-tabs button span { display: block; }
.fee-env-tabs button small { display: block; margin-top: 5px; color: var(--fee-gold); font-size: 9px; letter-spacing: .12em; }

.fee-active-env {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 16px;
  align-items: start;
  margin: 26px clamp(22px, 4vw, 48px);
  padding: 18px 20px;
  border-left: 2px solid var(--fee-red);
  background: color-mix(in srgb, var(--surface) 72%, transparent);
}

.fee-active-env i { width: 9px; height: 9px; margin-top: 7px; border-radius: 50%; background: var(--fee-red); box-shadow: 0 0 16px var(--fee-red); }
.fee-active-env strong { display: block; font-size: 15px; }
.fee-active-env p { margin: 4px 0 0 !important; color: var(--muted); font: 400 13px/1.55 var(--sans) !important; }

.fee-lab-body { padding: 0 clamp(22px, 4vw, 48px) clamp(26px, 4vw, 48px); }
.fee-panel { border: 1px solid var(--line); background: color-mix(in srgb, var(--bg) 54%, transparent); }
.fee-panel + .fee-panel { margin-top: 22px; }
.fee-panel-head { display: flex; align-items: end; justify-content: space-between; gap: 20px; padding: 20px 22px; border-bottom: 1px solid var(--line); }
.fee-panel-head h4 { margin: 4px 0 0; color: var(--text); font: 500 21px/1.2 var(--serif); }
.fee-panel-head p { max-width: 430px; margin: 0 !important; color: var(--muted); font: 400 12px/1.55 var(--sans) !important; text-align: right; }

.fee-timeline-scroll { overflow-x: auto; padding: 24px 22px 26px; scrollbar-width: thin; }
.fee-timeline { min-width: 720px; }
.fee-axis-caption { display: flex; align-items: baseline; justify-content: space-between; gap: 18px; margin: 0 0 18px 116px; }
.fee-axis-caption strong { color: var(--text); font-size: 11px; letter-spacing: .06em; }
.fee-axis-caption small { color: var(--muted); font-size: 10px; text-align: right; }
.fee-axis { position: relative; height: 24px; margin-left: 116px; border-top: 1px solid var(--line); }
.fee-axis span { position: absolute; top: -7px; translate: -50% 0; padding: 0 5px; background: var(--bg); color: var(--muted); font-size: 10px; }
.fee-race-row { display: grid; grid-template-columns: 104px 1fr; gap: 12px; align-items: center; min-height: 52px; }
.fee-race-label strong { display: block; font-size: 12px; }
.fee-race-label small { display: block; color: var(--muted); font-size: 10px; }
.fee-track { position: relative; height: 18px; border-bottom: 1px solid color-mix(in srgb, var(--line) 68%, transparent); }
.fee-span { position: absolute; top: 7px; height: 2px; background: color-mix(in srgb, var(--fee-gold) 55%, var(--line)); }
.fee-mark { position: absolute; top: 2px; width: 10px; height: 10px; translate: -50% 0; border: 2px solid var(--bg); outline: 1px solid currentColor; background: currentColor; }
.fee-mark-ten { color: var(--fee-teal); border-radius: 50%; }
.fee-mark-ninety { color: var(--fee-gold); rotate: 45deg; }
.fee-mark-confirm { top: 0; width: 5px; height: 14px; color: var(--fee-red); }
.fee-mark[data-before-axis="true"] { filter: saturate(.55); opacity: .72; }
.fee-race-row[data-base="true"] .fee-mark-confirm { color: var(--text); }

.fee-metric-wrap { padding: 22px; }
.fee-metric-cards { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); }
.fee-metric-card { min-height: 126px; padding: 18px; background: var(--surface); }
.fee-metric-card small { color: var(--muted); font-size: 10px; letter-spacing: .07em; }
.fee-metric-card strong { display: block; margin: 12px 0 8px; color: var(--text); font: 500 25px/1 var(--serif); }
.fee-metric-card span { display: block; color: var(--muted); font-size: 11px; line-height: 1.45; }
.fee-metric-card[data-win="true"] { box-shadow: inset 2px 0 var(--fee-teal); }
.fee-metric-card[data-loss="true"] { box-shadow: inset 2px 0 var(--fee-red); }

.fee-mismatch {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 24px;
  align-items: center;
  margin-top: 22px;
  padding: 22px;
  border: 1px solid var(--line);
  background: linear-gradient(100deg, color-mix(in srgb, var(--fee-red) 9%, transparent), transparent 58%);
}
.fee-mismatch h4 { margin: 0 0 6px; color: var(--text); font: 500 20px/1.2 var(--serif); }
.fee-mismatch p { margin: 0 !important; color: var(--muted); font: 400 12px/1.6 var(--sans) !important; }
.fee-mismatch strong { color: var(--fee-red); font: 500 28px/1 var(--serif); white-space: nowrap; }

.fee-boundary { margin: 22px 0 0 !important; color: var(--muted); font: 400 12px/1.65 var(--sans) !important; }
.fee-boundary b { color: var(--fee-gold); font-weight: 600; }

.fee-education-shell { display: grid; grid-template-columns: minmax(260px, .75fr) minmax(0, 1.25fr); }
.fee-education-intro { padding: clamp(28px, 4vw, 48px); border-right: 1px solid var(--line); }
.fee-education-workbench { padding: clamp(28px, 4vw, 48px); }
.fee-policy-result { min-height: 216px; margin-top: 18px; padding: 26px; border: 1px solid var(--line); background: color-mix(in srgb, var(--bg) 62%, transparent); }
.fee-policy-result h4 { margin: 0; color: var(--text); font: 500 24px/1.2 var(--serif); }
.fee-policy-result > p { margin: 12px 0 20px !important; color: var(--muted); font: 400 13px/1.65 var(--sans) !important; }
.fee-policy-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: var(--line); }
.fee-policy-grid div { padding: 16px; background: var(--surface); }
.fee-policy-grid small { display: block; color: var(--muted); font-size: 10px; }
.fee-policy-grid strong { display: block; margin-top: 8px; color: var(--text); font: 500 15px/1.35 var(--serif); }
.fee-concept-note { margin: 16px 0 0 !important; color: var(--fee-gold); font: 500 11px/1.5 var(--sans) !important; letter-spacing: .05em; }
.fee-lab .sr-only,
.fee-education-lab .sr-only { position: absolute !important; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }

@media (max-width: 860px) {
  .fee-lab-head,
  .fee-education-shell { grid-template-columns: 1fr; }
  .fee-education-intro { border-right: 0; border-bottom: 1px solid var(--line); }
  .fee-stat-strip { grid-template-columns: repeat(2, 1fr); }
  .fee-stat-strip > div:nth-child(2) { border-right: 0; }
  .fee-stat-strip > div:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
  .fee-env-tabs { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 560px) {
  .fee-lab,
  .fee-education-lab { width: calc(100vw - 24px); margin: 56px 50%; }
  .fee-lab-head,
  .fee-lab-body,
  .fee-education-intro,
  .fee-education-workbench { padding-left: 18px; padding-right: 18px; }
  .fee-env-tabs { padding-left: 18px; padding-right: 18px; }
  .fee-env-tabs,
  .fee-policy-tabs { grid-template-columns: 1fr; }
  .fee-active-env { margin-left: 18px; margin-right: 18px; }
  .fee-panel-head { display: block; }
  .fee-panel-head p { margin-top: 8px !important; text-align: left; }
  .fee-axis-caption { align-items: flex-start; flex-direction: column; gap: 4px; }
  .fee-axis-caption small { text-align: left; }
  .fee-metric-cards { grid-template-columns: 1fr; }
  .fee-mismatch { grid-template-columns: 1fr; }
  .fee-policy-grid { grid-template-columns: 1fr; }
}

@media (prefers-reduced-motion: reduce) {
  .fee-lab button,
  .fee-education-lab button { transition: none; }
}