/* Shared learning-page design. Topic-specific content reuses these components. */
.mono-page {
  --mono-paper: #faf7f0;
  --mono-paper-deep: #f1eadc;
  --mono-card: #fffdf8;
  --mono-ink: #2c2c2a;
  --mono-soft: #6f6b61;
  --mono-line: rgba(189, 179, 159, .64);
  --mono-green: #4f6f32;
  --mono-green-dark: #354b22;
  --mono-green-soft: #edf4e4;
  --mono-coral: #c95f4c;
  --mono-coral-soft: #fff0ec;
  --mono-amber: #d49329;
  --mono-amber-soft: #fff5e2;
  --mono-teal: #2c7f82;
  --mono-teal-soft: #e9f6f5;
  --mono-plum: #80669d;
  --mono-plum-soft: #f2edf7;
  color: var(--mono-ink);
  background:
    radial-gradient(circle at 94% 8%, rgba(231, 240, 219, .72), transparent 29rem),
    linear-gradient(180deg, #fffdf8 0%, var(--mono-paper) 55%, #f6f1e7 100%);
  font-family: var(--font-body);
  font-size: .94rem;
  line-height: 1.7;
}

.mono-page *,
.mono-page *::before,
.mono-page *::after { box-sizing: border-box; }

.mono-page h1,
.mono-page h2,
.mono-page h3,
.mono-page h4,
.mono-page p { margin-top: 0; }

.mono-page a:focus-visible,
.mono-page button:focus-visible,
.mono-page input:focus-visible,
.mono-page summary:focus-visible {
  outline: 3px solid rgba(44, 127, 130, .38);
  outline-offset: 3px;
}

.mono-ad {
  width: min(100% - 32px, 1200px);
  min-height: 92px;
  margin-inline: auto;
  color: #8a8373;
  font-size: .7rem;
  font-weight: 700;
  letter-spacing: .04em;
  text-transform: uppercase;
}

.mono-ad--top { margin-top: 1rem; }
.mono-ad--inline { width: 100%; margin-block: .2rem 1.2rem; }
.mono-ad--mobile { display: none; }
.mono-ad--side-rail { display: none; }
.mono-ad--bottom { margin-block: 1rem 2rem; }
.mono-ad .ad-slot,
.mono-ad .adsbygoogle { display: block; width: 100%; min-width: 0; min-height: inherit; }

@media (min-width: 1840px) {
  .mono-page { position: relative; }

  .mono-ad--side-rail {
    display: block;
    position: absolute;
    top: 650px;
    left: max(24px, calc(50% - 910px));
    width: 300px;
    min-height: 600px;
    margin: 0;
  }
}

.mono-hero,
.mono-progress-strip,
.mono-layout {
  width: min(100% - 48px, 1180px);
  margin-inline: auto;
}

.mono-hero {
  min-height: 500px;
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(300px, .72fr);
  gap: 2.5rem;
  align-items: center;
  overflow: hidden;
  border: 1px solid rgba(79, 111, 50, .22);
  border-radius: 22px;
  background:
    linear-gradient(92deg, rgba(255, 253, 248, .99) 0%, rgba(255, 253, 248, .92) 55%, rgba(238, 244, 229, .72) 100%),
    url('/assets/img/Garden5.png') center / cover no-repeat;
  box-shadow: 0 24px 58px rgba(53, 75, 34, .1);
  padding: clamp(2rem, 5vw, 4.2rem);
}

.mono-crumbs {
  display: flex;
  flex-wrap: wrap;
  gap: .45rem;
  margin-bottom: 1.2rem;
  color: var(--mono-soft);
  font-size: .76rem;
}

.mono-crumbs a { color: inherit; text-decoration: none; }
.mono-crumbs a::after { content: '>'; margin-left: .45rem; }

.mono-kicker {
  margin-bottom: .4rem;
  color: var(--mono-green);
  font-size: .72rem;
  font-weight: 800;
  letter-spacing: .05em;
  line-height: 1.35;
  text-transform: uppercase;
}

.mono-hero h1 {
  max-width: 720px;
  margin-bottom: 1rem;
  font-family: var(--font-display);
  font-size: clamp(2.8rem, 6vw, 5.05rem);
  font-weight: 600;
  letter-spacing: -.04em;
  line-height: 1;
  text-wrap: balance;
}

.mono-hero h1 em { color: var(--mono-green); font-style: italic; }

.mono-hero__lead {
  max-width: 670px;
  margin-bottom: 1.4rem;
  color: #55534d;
  font-size: 1.02rem;
  line-height: 1.75;
}

.mono-hero__actions { display: flex; flex-wrap: wrap; gap: .7rem; margin-bottom: 1.5rem; }

.mono-hero__facts {
  display: flex;
  flex-wrap: wrap;
  gap: .75rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.mono-hero__facts li {
  min-width: 126px;
  display: grid;
  border-left: 2px solid rgba(79, 111, 50, .42);
  padding-left: .7rem;
}

.mono-hero__facts strong { color: var(--mono-green-dark); font-family: var(--font-display); font-size: 1.06rem; }
.mono-hero__facts span { color: var(--mono-soft); font-size: .7rem; }

.mono-hero__art { display: grid; justify-items: center; align-self: end; margin: 0; }
.mono-hero__art img { width: min(100%, 420px); filter: drop-shadow(0 25px 25px rgba(53, 75, 34, .16)); }
.mono-hero__art figcaption {
  max-width: 310px;
  margin-top: -.2rem;
  color: var(--mono-green-dark);
  font-family: var(--font-hand);
  font-size: 1.12rem;
  font-weight: 700;
  line-height: 1.25;
  text-align: center;
  transform: rotate(-1deg);
}

.mono-progress-strip {
  display: grid;
  grid-template-columns: auto minmax(180px, 1fr) auto;
  gap: 1rem;
  align-items: center;
  margin-block: 1.2rem 2rem;
  border: 1px solid var(--mono-line);
  border-radius: 13px;
  background: rgba(255, 253, 248, .9);
  box-shadow: 0 10px 26px rgba(44, 44, 42, .045);
  padding: .85rem 1rem;
}

.mono-progress-strip > div:first-child { display: flex; gap: .55rem; align-items: baseline; white-space: nowrap; }
.mono-progress-strip span,
.mono-progress-strip small { color: var(--mono-soft); font-size: .72rem; }
.mono-progress-strip strong { color: var(--mono-green-dark); font-family: var(--font-display); }
.mono-progress-bar { height: 8px; overflow: hidden; border-radius: 999px; background: #e5dfd2; }
.mono-progress-bar i { display: block; height: 100%; border-radius: inherit; background: linear-gradient(90deg, var(--mono-green), #8dab62); transition: width .25s ease; }

.mono-layout {
  display: grid;
  grid-template-columns: 240px minmax(0, 1fr);
  gap: 1.5rem;
  align-items: start;
  padding-bottom: 4rem;
}

.mono-rail { position: relative; }
.mono-rail__inner { position: sticky; top: 108px; display: grid; gap: .85rem; }
.mono-rail nav { display: grid; overflow: hidden; border: 1px solid var(--mono-line); border-radius: 14px; background: rgba(255, 253, 248, .94); }

.mono-rail nav a {
  display: grid;
  grid-template-columns: 30px minmax(0, 1fr) 18px;
  gap: .55rem;
  align-items: center;
  border-bottom: 1px solid rgba(189, 179, 159, .4);
  color: var(--mono-ink);
  padding: .72rem;
  text-decoration: none;
  transition: background .15s ease;
}

.mono-rail nav a:last-child { border-bottom: 0; }
.mono-rail nav a:hover,
.mono-rail nav a.is-active { background: var(--mono-green-soft); }
.mono-rail nav a > span { color: var(--mono-green); font-family: var(--font-display); font-size: .82rem; font-weight: 700; }
.mono-rail nav strong { display: block; font-size: .72rem; line-height: 1.3; }
.mono-rail nav small { display: block; color: var(--mono-soft); font-size: .61rem; line-height: 1.3; }
.mono-rail nav i { color: #aaa291; font-size: .8rem; font-style: normal; text-align: right; }
.mono-rail nav a.is-complete i { color: var(--mono-green); }

.mono-rail__download {
  display: grid;
  gap: .12rem;
  border: 1px solid rgba(79, 111, 50, .3);
  border-radius: 12px;
  background: var(--mono-green-soft);
  color: var(--mono-green-dark);
  padding: .9rem;
  text-decoration: none;
}

.mono-rail__download span { font-size: .62rem; text-transform: uppercase; }
.mono-rail__download strong { font-family: var(--font-display); font-size: .9rem; }

.mono-workspace { min-width: 0; display: grid; gap: 1.35rem; }

.mono-chapter,
.mono-video-library {
  scroll-margin-top: 112px;
  overflow: hidden;
  border: 1px solid var(--mono-line);
  border-radius: 18px;
  background: rgba(255, 253, 248, .96);
  box-shadow: 0 16px 36px rgba(44, 44, 42, .055);
  padding: clamp(1.25rem, 3.2vw, 2.2rem);
}

.mono-chapter__head {
  display: grid;
  grid-template-columns: 56px minmax(0, 1fr) auto;
  gap: .9rem;
  align-items: center;
  margin-bottom: 1.6rem;
  border-bottom: 1px dashed var(--mono-line);
  padding-bottom: 1.1rem;
}

.mono-chapter__number {
  width: 52px;
  height: 52px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--mono-green-soft);
  color: var(--mono-green-dark);
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 700;
}

.mono-chapter__head h2,
.mono-video-library h2 {
  margin-bottom: 0;
  font-family: var(--font-display);
  font-size: clamp(1.65rem, 3.2vw, 2.45rem);
  font-weight: 620;
  letter-spacing: -.025em;
  line-height: 1.08;
}

.mono-complete {
  display: inline-flex;
  align-items: center;
  gap: .38rem;
  border: 1px solid var(--mono-line);
  border-radius: 999px;
  background: #fff;
  color: var(--mono-soft);
  padding: .55rem .78rem;
  font: inherit;
  font-size: .7rem;
  font-weight: 750;
  cursor: pointer;
}

.mono-complete > span:first-child { width: 18px; height: 18px; display: grid; place-items: center; border-radius: 50%; background: #eee9df; color: #fff; font-size: .65rem; }
.mono-complete [data-complete-label] { color: inherit; }
.mono-complete.is-complete { border-color: rgba(79, 111, 50, .38); background: var(--mono-green-soft); color: var(--mono-green-dark); }
.mono-complete.is-complete > span:first-child { background: var(--mono-green); }

.mono-definition-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: .8rem; }
.mono-definition-grid article,
.mono-performance-grid article {
  border: 1px solid rgba(79, 111, 50, .22);
  border-radius: 13px;
  background: linear-gradient(145deg, #fff, #f3f7ed);
  padding: 1rem;
}

.mono-definition-grid span,
.mono-note-stack span,
.mono-performance-grid span {
  color: var(--mono-green);
  font-size: .66rem;
  font-weight: 800;
  letter-spacing: .04em;
  text-transform: uppercase;
}

.mono-definition-grid h3,
.mono-performance-grid h3 {
  margin: .35rem 0 .45rem;
  font-family: var(--font-display);
  font-size: 1.05rem;
  line-height: 1.22;
}

.mono-definition-grid p,
.mono-performance-grid p { margin-bottom: 0; color: var(--mono-soft); font-size: .78rem; line-height: 1.58; }

.mono-explain {
  display: grid;
  grid-template-columns: .74fr 1.25fr;
  gap: 1rem 1.5rem;
  align-items: center;
  margin-top: 1rem;
  border-left: 4px solid var(--mono-amber);
  border-radius: 10px;
  background: var(--mono-amber-soft);
  padding: 1.2rem;
}

.mono-explain > p:last-child { grid-column: 1 / -1; margin-bottom: 0; color: var(--mono-soft); font-size: .82rem; }
.mono-explain h3 { margin-bottom: 0; font-family: var(--font-display); font-size: 1.25rem; line-height: 1.2; }
.mono-choice-chain,
.mono-exam-chain { display: flex; flex-wrap: wrap; gap: .5rem; align-items: center; }
.mono-choice-chain span,
.mono-choice-chain b,
.mono-exam-chain span { border-radius: 999px; background: #fff; padding: .42rem .65rem; font-size: .69rem; font-weight: 700; }
.mono-choice-chain i,
.mono-exam-chain i { color: var(--mono-amber); font-style: normal; font-weight: 800; }
.mono-choice-chain b { color: var(--mono-soft); background: transparent; }

.mono-natural-grid,
.mono-diagram-grid {
  display: grid;
  grid-template-columns: minmax(0, .9fr) minmax(340px, 1.1fr);
  gap: 1.1rem;
  align-items: center;
  margin-top: 1rem;
}

.mono-natural-grid > div:first-child { padding: .5rem; }
.mono-natural-grid h3 { margin-bottom: .6rem; font-family: var(--font-display); font-size: 1.35rem; }
.mono-natural-grid p { color: var(--mono-soft); font-size: .82rem; }

.mono-cost-sketch,
.mono-diagram-card {
  overflow: hidden;
  border: 1px solid var(--mono-line);
  border-radius: 13px;
  background: #fff;
  padding: .8rem;
}

.mono-cost-sketch svg,
.mono-diagram-card svg { width: 100%; height: auto; display: block; }
.mono-page svg .axis { fill: none; stroke: #887f70; stroke-width: 2; }
.mono-page svg .curve { fill: none; stroke-width: 3; stroke-linecap: round; }
.mono-page svg .curve--ac { stroke: var(--mono-coral); }
.mono-page svg .curve--avc { stroke: var(--mono-amber); }
.mono-page svg .curve--mc { stroke: var(--mono-teal); }
.mono-page svg .curve--demand,
.mono-page svg .curve--ar { stroke: var(--mono-green); }
.mono-page svg .curve--mr { stroke: var(--mono-coral); }
.mono-page svg .guide { fill: none; stroke: #b3aa9b; stroke-width: 1.4; stroke-dasharray: 5 5; }
.mono-page svg .dwl { fill: rgba(212, 147, 41, .32); stroke: var(--mono-amber); stroke-width: 1.5; }
.mono-page svg text { fill: #625d54; font: 700 15px var(--font-body); }

.mono-quick-check {
  display: grid;
  grid-template-columns: minmax(180px, .7fr) minmax(280px, 1.3fr);
  gap: .9rem 1.2rem;
  align-items: center;
  margin-top: 1rem;
  border: 1px solid rgba(44, 127, 130, .28);
  border-radius: 13px;
  background: var(--mono-teal-soft);
  padding: 1rem;
}

.mono-quick-check > div:first-child span { display: block; color: var(--mono-teal); font-size: .65rem; font-weight: 800; text-transform: uppercase; }
.mono-quick-check > div:first-child strong { font-family: var(--font-display); line-height: 1.3; }
.mono-check-options { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: .55rem; }
.mono-check-options button {
  min-height: 58px;
  border: 1px solid rgba(44, 127, 130, .26);
  border-radius: 9px;
  background: #fff;
  color: var(--mono-ink);
  padding: .6rem;
  font: inherit;
  font-size: .73rem;
  font-weight: 650;
  line-height: 1.35;
  cursor: pointer;
}
.mono-check-options button:hover { border-color: var(--mono-teal); }
.mono-check-options button.is-correct { border-color: var(--mono-green); background: var(--mono-green-soft); color: var(--mono-green-dark); }
.mono-check-options button.is-wrong { border-color: var(--mono-coral); background: var(--mono-coral-soft); color: #8a382c; }
.mono-quick-check > p { grid-column: 1 / -1; margin-bottom: 0; font-size: .76rem; font-weight: 650; }

.mono-characteristics { display: grid; gap: .55rem; }
.mono-characteristics article { display: grid; grid-template-columns: 42px minmax(0, 1fr); gap: .75rem; align-items: center; border: 1px solid var(--mono-line); border-radius: 11px; padding: .72rem .9rem; }
.mono-characteristics article > span { width: 34px; height: 34px; display: grid; place-items: center; border-radius: 50%; background: var(--mono-coral-soft); color: var(--mono-coral); font-family: var(--font-display); font-weight: 700; }
.mono-characteristics h3 { margin-bottom: .1rem; font-family: var(--font-display); font-size: .98rem; }
.mono-characteristics p { margin-bottom: 0; color: var(--mono-soft); font-size: .76rem; }

.mono-subhead { display: flex; justify-content: space-between; gap: 1.5rem; align-items: end; margin: 1.5rem 0 .85rem; }
.mono-subhead h2,
.mono-subhead h3 { margin-bottom: 0; font-family: var(--font-display); font-size: 1.45rem; line-height: 1.2; }
.mono-subhead > p { max-width: 410px; margin-bottom: 0; color: var(--mono-soft); font-size: .78rem; }

.mono-barriers { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: .65rem; }
.mono-barriers details { border: 1px solid var(--mono-line); border-radius: 11px; background: #fff; padding: .8rem; }
.mono-barriers details[open] { border-color: rgba(201, 95, 76, .38); background: var(--mono-coral-soft); }
.mono-barriers summary { display: grid; grid-template-columns: 60px minmax(0, 1fr) 18px; gap: .55rem; align-items: center; list-style: none; cursor: pointer; }
.mono-barriers summary::-webkit-details-marker { display: none; }
.mono-barriers summary span { color: var(--mono-coral); font-size: .67rem; font-weight: 800; text-transform: uppercase; }
.mono-barriers summary strong { font-size: .76rem; }
.mono-barriers summary i { color: var(--mono-coral); font-size: 1rem; font-style: normal; }
.mono-barriers details[open] summary i { transform: rotate(45deg); }
.mono-barriers p { margin: .7rem 0 0 60px; color: var(--mono-soft); font-size: .75rem; line-height: 1.55; }
.mono-exam-chain { justify-content: center; margin-top: .85rem; border-radius: 10px; background: var(--mono-paper-deep); padding: .75rem; }
.mono-exam-chain i { color: var(--mono-green); }

.mono-diagram-card__head { display: grid; gap: .1rem; border-bottom: 1px dashed var(--mono-line); padding: .35rem .35rem .75rem; }
.mono-diagram-card__head span { color: var(--mono-green); font-size: .66rem; font-weight: 800; text-transform: uppercase; }
.mono-diagram-card__head strong { font-family: var(--font-display); font-size: .95rem; }
.mono-note-stack { display: grid; gap: .65rem; }
.mono-note-stack article { border-left: 3px solid var(--mono-green); border-radius: 0 9px 9px 0; background: var(--mono-green-soft); padding: .85rem; }
.mono-note-stack article:nth-child(2) { border-color: var(--mono-coral); background: var(--mono-coral-soft); }
.mono-note-stack article:nth-child(3) { border-color: var(--mono-amber); background: var(--mono-amber-soft); }
.mono-note-stack p { margin: .25rem 0 0; color: var(--mono-soft); font-size: .76rem; line-height: 1.55; }

.mono-revenue-lab,
.mono-concentration-lab {
  margin-top: 1.1rem;
  border: 1px solid rgba(128, 102, 157, .28);
  border-radius: 13px;
  background: var(--mono-plum-soft);
  padding: 1rem;
}
.mono-revenue-lab .mono-subhead { margin: 0 0 .8rem; }
.mono-table-scroll { overflow-x: auto; border: 1px solid var(--mono-line); border-radius: 10px; background: #fff; }
.mono-table-scroll table { width: 100%; min-width: 560px; border-collapse: collapse; font-size: .75rem; }
.mono-table-scroll th,
.mono-table-scroll td { border-bottom: 1px solid rgba(189, 179, 159, .44); padding: .68rem .75rem; text-align: left; }
.mono-table-scroll thead th { background: var(--mono-green-soft); color: var(--mono-green-dark); font-size: .66rem; text-transform: uppercase; }
.mono-table-scroll tbody tr:last-child th,
.mono-table-scroll tbody tr:last-child td { border-bottom: 0; }
[data-revenue-answer] { transition: color .18s ease, background .18s ease; }
.mono-revenue-lab:not(.is-revealed) [data-revenue-answer] { color: transparent; background: linear-gradient(90deg, #e6dfd3, #eee8de); text-shadow: none; user-select: none; }
.mono-revenue-lab.is-revealed [data-revenue-answer] { color: var(--mono-ink); background: #fffaf1; font-weight: 750; }
.mono-lab-result { margin: .7rem 0 0; color: #55466a; font-size: .76rem; font-weight: 650; }

.mono-profit-rule { display: grid; grid-template-columns: 1fr auto 1fr auto 1fr; gap: .65rem; align-items: center; }
.mono-profit-rule > div { min-height: 106px; display: grid; grid-template-columns: 32px 1fr; gap: .55rem; align-items: start; border: 1px solid var(--mono-line); border-radius: 11px; background: #fff; padding: .75rem; }
.mono-profit-rule > div span { width: 28px; height: 28px; display: grid; place-items: center; border-radius: 50%; background: var(--mono-coral-soft); color: var(--mono-coral); font-family: var(--font-display); font-weight: 700; }
.mono-profit-rule p { margin-bottom: 0; color: var(--mono-soft); font-size: .74rem; line-height: 1.5; }
.mono-profit-rule > i { color: var(--mono-coral); font-style: normal; font-weight: 800; }

.mono-outcomes { margin-top: 1rem; }
.mono-outcome-tabs { display: flex; flex-wrap: wrap; gap: .45rem; }
.mono-outcome-tabs button,
.mono-switch button {
  border: 1px solid var(--mono-line);
  border-radius: 999px;
  background: #fff;
  color: var(--mono-soft);
  padding: .5rem .72rem;
  font: inherit;
  font-size: .68rem;
  font-weight: 750;
  cursor: pointer;
}
.mono-outcome-tabs button[aria-selected="true"],
.mono-switch button.is-active { border-color: var(--mono-coral); background: var(--mono-coral-soft); color: #8a382c; }
.mono-outcome-panel { margin-top: .6rem; border-left: 4px solid var(--mono-coral); border-radius: 9px; background: var(--mono-coral-soft); padding: .85rem 1rem; }
.mono-outcome-panel strong { font-family: var(--font-display); }
.mono-outcome-panel p { margin: .18rem 0 0; color: var(--mono-soft); font-size: .76rem; }

.mono-worked-number { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: .8rem 1rem; align-items: center; margin-top: 1rem; border: 1px solid rgba(79, 111, 50, .28); border-radius: 12px; background: var(--mono-green-soft); padding: 1rem; }
.mono-worked-number h3 { margin-bottom: .2rem; font-family: var(--font-display); font-size: 1.2rem; }
.mono-worked-number p:last-child { margin-bottom: 0; color: var(--mono-soft); font-size: .76rem; }
.mono-worked-number [data-profit-answer] { grid-column: 1 / -1; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: .55rem; }
.mono-worked-number [data-profit-answer]:not([hidden]) { display: grid; }
.mono-worked-number [data-profit-answer] span { border-radius: 8px; background: #fff; padding: .65rem; font-size: .72rem; }

.mono-graph-builder,
.mono-efficiency-lab {
  margin-top: 1.1rem;
  border: 1px solid rgba(44, 127, 130, .28);
  border-radius: 14px;
  background: linear-gradient(145deg, #fbfffe, var(--mono-teal-soft));
  padding: 1rem;
}

.mono-graph-builder .mono-subhead,
.mono-efficiency-lab .mono-subhead { margin: 0 0 .85rem; }

.mono-builder-targets { display: flex; flex-wrap: wrap; gap: .45rem; margin-bottom: .8rem; }
.mono-builder-targets button {
  border: 1px solid rgba(44, 127, 130, .3);
  border-radius: 999px;
  background: #fff;
  color: var(--mono-soft);
  padding: .5rem .72rem;
  font: inherit;
  font-size: .68rem;
  font-weight: 750;
  cursor: pointer;
}
.mono-builder-targets button:hover,
.mono-builder-targets button.is-active { border-color: var(--mono-teal); background: #dff1ef; color: #205e60; }

.mono-builder-grid { display: grid; grid-template-columns: minmax(0, 1.3fr) minmax(225px, .7fr); gap: 1rem; align-items: center; }
.mono-builder-canvas { overflow: hidden; border: 1px solid var(--mono-line); border-radius: 12px; background: #fff; padding: .7rem; }
.mono-builder-canvas svg { width: 100%; height: auto; display: block; }
.mono-builder-canvas > p { margin: .25rem .35rem 0; color: var(--mono-soft); font-size: .67rem; text-align: center; }
.mono-profit-area { fill: rgba(79, 111, 50, .19); stroke: rgba(79, 111, 50, .55); stroke-width: 1.4; }
.mono-profit-area[data-outcome="loss"],
.mono-profit-area[data-outcome="shutdown"] { fill: rgba(201, 95, 76, .16); stroke: rgba(201, 95, 76, .58); }
.mono-profit-area[data-outcome="normal"] { fill: rgba(44, 127, 130, .12); stroke: rgba(44, 127, 130, .48); }
.mono-drag-handle { stroke: #fff; stroke-width: 4; cursor: ns-resize; touch-action: none; filter: drop-shadow(0 2px 4px rgba(44, 44, 42, .22)); }
.mono-drag-handle--demand { fill: var(--mono-green); }
.mono-drag-handle--ac { fill: var(--mono-coral); }
.mono-drag-handle--avc { fill: var(--mono-amber); }
.mono-equilibrium-dot { fill: var(--mono-teal); stroke: #fff; stroke-width: 2; }

.mono-builder-controls { display: grid; gap: .75rem; }
.mono-builder-controls label { display: grid; gap: .35rem; }
.mono-builder-controls label > span { display: grid; color: var(--mono-soft); font-size: .66rem; line-height: 1.35; }
.mono-builder-controls label b { color: var(--mono-ink); font-size: .73rem; }
.mono-builder-controls input[type="range"],
.mono-lab-slider input[type="range"] { width: 100%; accent-color: var(--mono-teal); cursor: ew-resize; }
.mono-builder-controls label:nth-child(2) input { accent-color: var(--mono-coral); }
.mono-builder-controls label:nth-child(3) input { accent-color: var(--mono-amber); }
.mono-builder-reading { display: grid; gap: .18rem; border-left: 3px solid var(--mono-teal); border-radius: 0 9px 9px 0; background: #fff; padding: .7rem; }
.mono-builder-reading span { color: var(--mono-teal); font-size: .62rem; font-weight: 800; text-transform: uppercase; }
.mono-builder-reading strong { font-size: .72rem; line-height: 1.45; }
.mono-builder-actions { display: flex; flex-wrap: wrap; gap: .45rem; }
.mono-builder-feedback { margin: .8rem 0 0; border-radius: 8px; background: #fff; color: var(--mono-soft); padding: .65rem .75rem; font-size: .72rem; font-weight: 700; }
.mono-builder-feedback.is-correct { background: var(--mono-green-soft); color: var(--mono-green-dark); }
.mono-builder-feedback.is-wrong { background: var(--mono-coral-soft); color: #8a382c; }

.mono-efficiency-lab { background: linear-gradient(145deg, #fffdf8, var(--mono-amber-soft)); border-color: rgba(212, 147, 41, .3); }
.mono-efficiency-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: .8rem; }
.mono-efficiency-card { overflow: hidden; border: 1px solid var(--mono-line); border-radius: 12px; background: #fff; padding: .85rem; }
.mono-efficiency-card header { min-height: 67px; }
.mono-efficiency-card header span { color: var(--mono-green); font-size: .63rem; font-weight: 800; text-transform: uppercase; }
.mono-efficiency-card--x header span { color: var(--mono-coral); }
.mono-efficiency-card h4 { margin: .2rem 0 0; font-family: var(--font-display); font-size: 1rem; line-height: 1.25; }
.mono-efficiency-card svg { width: 100%; height: auto; display: block; margin-block: .25rem; }
.mono-efficiency-card .dwl { transition: opacity .2s ease; }
.mono-lab-slider { display: grid; grid-template-columns: auto minmax(90px, 1fr) 42px; gap: .55rem; align-items: center; border-radius: 8px; background: var(--mono-paper); padding: .58rem .65rem; color: var(--mono-soft); font-size: .66rem; font-weight: 750; }
.mono-lab-slider output { color: var(--mono-green-dark); font-family: var(--font-display); font-size: .78rem; text-align: right; }
.mono-lab-constant { margin: .2rem 0 .55rem; border-left: 3px solid var(--mono-coral); padding-left: .65rem; color: var(--mono-soft); font-size: .66rem; line-height: 1.45; }
.mono-efficiency-card > p { margin: .65rem 0 0; color: var(--mono-soft); font-size: .72rem; line-height: 1.5; }
.mono-efficiency-card > .mono-lab-constant { margin: .2rem 0 .55rem; font-size: .66rem; }
.mono-attainable-cost { stroke: var(--mono-green); }
.mono-x-gap { fill: none; stroke: var(--mono-amber); stroke-width: 8; stroke-linecap: round; opacity: .65; }
.mono-x-dot { fill: var(--mono-coral); stroke: #fff; stroke-width: 3; cursor: ns-resize; touch-action: none; filter: drop-shadow(0 2px 4px rgba(44, 44, 42, .22)); }

.mono-performance-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: .75rem; margin-top: 1rem; }
.mono-performance-grid article:nth-child(2) { border-color: rgba(44, 127, 130, .25); background: linear-gradient(145deg, #fff, var(--mono-teal-soft)); }
.mono-performance-grid article:nth-child(3) { border-color: rgba(212, 147, 41, .28); background: linear-gradient(145deg, #fff, var(--mono-amber-soft)); }

.mono-scale-comparison { margin-top: 1rem; border: 1px solid rgba(44, 127, 130, .28); border-radius: 14px; background: linear-gradient(145deg, #fbfffe, var(--mono-teal-soft)); padding: 1rem; }
.mono-scale-comparison .mono-subhead { margin: 0 0 .85rem; }
.mono-scale-diagrams { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: .8rem; }
.mono-scale-card { overflow: hidden; border: 1px solid var(--mono-line); border-radius: 12px; background: #fff; padding: .85rem; }
.mono-scale-card header { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: .12rem .65rem; min-height: 72px; align-content: start; }
.mono-scale-card header span { grid-column: 1 / -1; color: var(--mono-coral); font-size: .63rem; font-weight: 800; text-transform: uppercase; }
.mono-scale-card--monopoly header span { color: var(--mono-green); }
.mono-scale-card h4 { margin: 0; font-family: var(--font-display); font-size: 1rem; line-height: 1.25; }
.mono-scale-card header strong { align-self: start; border-radius: 999px; background: var(--mono-coral-soft); color: #8a382c; padding: .28rem .48rem; font-size: .6rem; white-space: nowrap; }
.mono-scale-card--monopoly header strong { background: var(--mono-green-soft); color: var(--mono-green-dark); }
.mono-scale-card svg { width: 100%; height: auto; display: block; margin-block: .25rem; }
.mono-lrac { stroke: var(--mono-teal); stroke-width: 3; }
.mono-scale-point { fill: var(--mono-coral); stroke: #fff; stroke-width: 2; }
.mono-scale-card--monopoly .mono-scale-point { fill: var(--mono-green); }
.mono-scale-saving { fill: rgba(79, 111, 50, .1); stroke: none; }
.mono-scale-benchmark { fill: none; stroke: rgba(201, 95, 76, .65); stroke-width: 1.5; stroke-dasharray: 5 5; }
.mono-scale-card > p { margin: .45rem 0 0; color: var(--mono-soft); font-size: .7rem; line-height: 1.5; }
.mono-scale-chain { display: flex; flex-wrap: wrap; gap: .45rem; align-items: center; margin-top: .8rem; border-radius: 9px; background: #fff; padding: .7rem .8rem; color: var(--mono-soft); font-size: .68rem; font-weight: 750; }
.mono-scale-chain span { border-radius: 999px; background: var(--mono-paper); padding: .35rem .55rem; }
.mono-scale-chain i { color: var(--mono-teal); font-style: normal; }
.mono-scale-chain strong { color: var(--mono-green-dark); font-family: var(--font-display); font-size: .85rem; }
.mono-scale-condition { margin: .7rem 0 0; border-left: 3px solid var(--mono-amber); padding-left: .7rem; color: var(--mono-soft); font-size: .71rem; line-height: 1.55; }

.mono-contestable { display: grid; grid-template-columns: .85fr 1fr; gap: .85rem 1.2rem; border: 1px solid rgba(79, 111, 50, .24); border-radius: 13px; background: var(--mono-green-soft); padding: 1.1rem; }
.mono-contestable h3 { margin-bottom: 0; font-family: var(--font-display); font-size: 1.3rem; line-height: 1.2; }
.mono-contestable ul { margin: 0; padding-left: 1.2rem; color: var(--mono-green-dark); font-size: .77rem; }
.mono-contestable > p { grid-column: 1 / -1; margin-bottom: 0; color: var(--mono-soft); font-size: .78rem; }

.mono-comparison { margin-top: 1.1rem; }
.mono-comparison .mono-subhead { margin-bottom: .75rem; }
.mono-switch { display: flex; flex-wrap: wrap; gap: .4rem; }
.mono-comparison .mono-table-scroll th:first-child { width: 22%; color: var(--mono-green-dark); font-weight: 750; }
.mono-comparison__note { margin: .65rem 0 0; color: var(--mono-soft); font-size: .73rem; }

.mono-concentration-lab { display: grid; grid-template-columns: minmax(200px, .8fr) minmax(360px, 1.2fr); gap: .9rem 1rem; align-items: center; }
.mono-concentration-lab h3 { margin-bottom: .35rem; font-family: var(--font-display); font-size: 1.4rem; }
.mono-concentration-lab > div:first-child p:last-child { margin-bottom: 0; color: var(--mono-soft); font-size: .76rem; }
.mono-share-inputs { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: .5rem; }
.mono-share-inputs label { position: relative; display: grid; gap: .15rem; color: #55466a; font-size: .63rem; font-weight: 750; text-transform: uppercase; }
.mono-share-inputs input { width: 100%; border: 1px solid rgba(128, 102, 157, .35); border-radius: 8px; background: #fff; color: var(--mono-ink); padding: .55rem 1.55rem .55rem .55rem; font: inherit; font-size: .8rem; }
.mono-share-inputs em { position: absolute; right: .55rem; bottom: .52rem; color: var(--mono-soft); font-size: .68rem; font-style: normal; }
.mono-concentration-lab > button { justify-self: start; }
.mono-ratio-results { display: flex; gap: .6rem; }
.mono-ratio-results span { min-width: 104px; border-radius: 10px; background: #fff; padding: .55rem .7rem; color: #55466a; font-size: .67rem; font-weight: 800; }
.mono-ratio-results strong { display: block; color: var(--mono-plum); font-family: var(--font-display); font-size: 1.25rem; }
.mono-concentration-lab > p:last-child { grid-column: 1 / -1; margin-bottom: 0; color: var(--mono-soft); font-size: .72rem; }

.mono-essay-builder { margin-top: 1.15rem; }
.mono-essay-builder .mono-subhead > span { border-radius: 999px; background: var(--mono-coral-soft); color: var(--mono-coral); padding: .42rem .68rem; font-size: .68rem; font-weight: 800; white-space: nowrap; }
.mono-essay-steps { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: .65rem; }
.mono-essay-steps article { position: relative; border: 1px solid var(--mono-line); border-radius: 11px; background: #fff; padding: .9rem; }
.mono-essay-steps span { color: var(--mono-coral); font-family: var(--font-display); font-size: 1.35rem; font-weight: 700; }
.mono-essay-steps h4 { margin: .35rem 0 .25rem; font-family: var(--font-display); font-size: .98rem; }
.mono-essay-steps p { margin-bottom: 0; color: var(--mono-soft); font-size: .72rem; line-height: 1.52; }

.mono-download-panel { display: grid; grid-template-columns: 180px minmax(0, 1fr); gap: 1.3rem; align-items: center; margin-top: 1.2rem; border-radius: 15px; background: linear-gradient(130deg, var(--mono-green-dark), #526f37); color: #fff; padding: 1.2rem 1.4rem; }
.mono-download-panel img { width: 100%; max-height: 170px; object-fit: contain; filter: drop-shadow(0 16px 18px rgba(0, 0, 0, .18)); }
.mono-download-panel h3 { margin-bottom: .35rem; color: #fff; font-family: var(--font-display); font-size: 1.55rem; }
.mono-download-panel p:not(.mono-kicker) { margin-bottom: .75rem; color: rgba(255, 255, 255, .8); font-size: .78rem; }
.mono-download-panel .mono-kicker { color: #dceabf; }
.mono-download-panel > div > div { display: flex; flex-wrap: wrap; gap: .7rem; align-items: center; }
.mono-download-panel > div > div > span { color: rgba(255, 255, 255, .72); font-size: .68rem; }

.mono-video-library { margin-top: .15rem; }
.mono-video-library > .mono-subhead { margin: 0 0 1rem; }
.mono-video-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: .65rem; }
.mono-video-grid article { display: grid; grid-template-columns: 40px minmax(0, 1fr) auto; gap: .7rem; align-items: center; border: 1px solid var(--mono-line); border-radius: 11px; background: #fff; padding: .75rem; }
.mono-video-grid article > span { width: 35px; height: 35px; display: grid; place-items: center; border-radius: 50%; background: var(--mono-green-soft); color: var(--mono-green-dark); font-family: var(--font-display); font-weight: 700; }
.mono-video-grid h3 { margin-bottom: .05rem; font-family: var(--font-display); font-size: .92rem; }
.mono-video-grid p { margin-bottom: 0; color: var(--mono-soft); font-size: .67rem; }
.mono-video-grid em,
.mono-answer-status > em,
.mono-answer-status > a { border-radius: 999px; background: #eee9df; color: var(--mono-soft); padding: .35rem .55rem; font-size: .62rem; font-style: normal; white-space: nowrap; }
.mono-answer-status > a { background: var(--mono-green-soft); color: var(--mono-green-dark); font-weight: 750; text-decoration: none; }
.mono-answer-status { display: grid; grid-template-columns: 36px minmax(0, 1fr) auto; gap: .7rem; align-items: center; margin-top: .75rem; border: 1px dashed var(--mono-line); border-radius: 11px; background: var(--mono-paper); padding: .8rem; }
.mono-answer-status > span { width: 32px; height: 32px; display: grid; place-items: center; border-radius: 50%; background: #ddd6c8; color: #fff; }
.mono-answer-status strong { font-family: var(--font-display); }
.mono-answer-status p { margin: .05rem 0 0; color: var(--mono-soft); font-size: .68rem; }

.mono-next { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: .65rem; }
.mono-next a { min-height: 108px; display: grid; align-content: center; border: 1px solid var(--mono-line); border-radius: 12px; background: rgba(255, 253, 248, .94); color: var(--mono-ink); padding: 1rem; text-decoration: none; transition: transform .16s ease, border-color .16s ease; }
.mono-next a:hover { border-color: rgba(79, 111, 50, .58); transform: translateY(-2px); }
.mono-next span { color: var(--mono-green); font-size: .65rem; font-weight: 800; text-transform: uppercase; }
.mono-next strong { margin-top: .25rem; font-family: var(--font-display); font-size: 1.05rem; line-height: 1.25; }

.mono-page[data-learning-topic="unit-7-6-perfect-competition"] {
  --mono-green: #2f7463;
  --mono-green-dark: #23584c;
  --mono-green-soft: #e5f2e9;
  --mono-teal: #2f7881;
  --mono-teal-soft: #e4f2f3;
}

.pc-market-lab,
.pc-outcome-lab,
.pc-entry-lab,
.pc-supply-lab,
.pc-efficiency-lab {
  margin-top: 1.1rem;
}

.pc-paired-diagrams {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: .8rem;
}

.pc-paired-diagrams .mono-diagram-card svg {
  margin-top: .25rem;
}

.mono-page svg .pc-supply-line {
  fill: none;
  stroke: var(--mono-coral);
  stroke-width: 3;
  stroke-linecap: round;
}

.mono-page svg .pc-price-line {
  fill: none;
  stroke: var(--mono-green);
  stroke-width: 3.4;
  stroke-linecap: round;
}

.mono-page svg .pc-price-line,
.mono-page svg [data-pc-industry-demand],
.mono-page svg [data-pc-entry-supply],
.mono-page svg [data-pc-outcome-guides],
.mono-page svg [data-pc-supply-guide],
.mono-page svg [data-pc-efficiency-guide] {
  transition: d .22s ease;
}

.pc-lab-reading,
.pc-condition {
  margin: .7rem 0 0;
  border-left: 3px solid var(--mono-teal);
  border-radius: 0 8px 8px 0;
  background: #fff;
  color: var(--mono-soft);
  padding: .68rem .78rem;
  font-size: .73rem;
  font-weight: 650;
  line-height: 1.55;
}

.pc-condition {
  border-left-color: var(--mono-amber);
  background: var(--mono-amber-soft);
}

.pc-outcome-lab .mono-profit-area[data-outcome="normal"] {
  fill: rgba(44, 127, 130, .12);
  stroke: rgba(44, 127, 130, .48);
}

.pc-outcome-lab .mono-profit-area[data-outcome="loss"],
.pc-outcome-lab .mono-profit-area[data-outcome="shutdown"] {
  fill: rgba(201, 95, 76, .16);
  stroke: rgba(201, 95, 76, .58);
}

.pc-shutdown-zone {
  fill: rgba(201, 95, 76, .08);
  stroke: none;
}

.mono-page svg .pc-mc-muted {
  stroke: rgba(47, 120, 129, .35);
  stroke-width: 3;
}

.mono-page svg .pc-supply-highlight {
  stroke: var(--mono-green);
  stroke-width: 6;
  stroke-linecap: round;
  filter: drop-shadow(0 2px 3px rgba(35, 88, 76, .18));
}

.pc-two-notes {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin-top: .9rem;
}

.pc-two-notes article:nth-child(2) {
  border-color: var(--mono-teal);
  background: var(--mono-teal-soft);
}

.pc-efficiency-lab .mono-switch {
  justify-content: flex-end;
}

@media (max-width: 1020px) {
  .mono-hero { grid-template-columns: minmax(0, 1fr) 280px; }
  .mono-layout { grid-template-columns: 210px minmax(0, 1fr); gap: 1rem; }
  .mono-definition-grid,
  .mono-performance-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .mono-definition-grid article:last-child,
  .mono-performance-grid article:last-child { grid-column: 1 / -1; }
  .mono-essay-steps { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .mono-video-grid { grid-template-columns: 1fr; }
  .mono-builder-grid { grid-template-columns: 1fr; }
}

@media (max-width: 820px) {
  .mono-ad--mobile { display: block; width: min(100% - 32px, 760px); min-height: 100px; margin: 0 auto 1rem; }
  .mono-hero { grid-template-columns: 1fr; min-height: auto; padding-bottom: 1.2rem; }
  .mono-hero__art { display: none; }
  .mono-progress-strip { grid-template-columns: auto 1fr; }
  .mono-progress-strip small { grid-column: 1 / -1; }
  .mono-layout { display: block; }
  .mono-rail__inner { position: static; margin-bottom: 1rem; }
  .mono-rail .mono-kicker { display: none; }
  .mono-rail nav { display: flex; overflow-x: auto; border-radius: 11px; }
  .mono-rail nav a { min-width: 185px; border-right: 1px solid rgba(189, 179, 159, .4); border-bottom: 0; }
  .mono-rail__download { display: none; }
  .mono-natural-grid,
  .mono-diagram-grid,
  .mono-contestable,
  .mono-concentration-lab { grid-template-columns: 1fr; }
  .mono-contestable > p { grid-column: auto; }
  .mono-concentration-lab > p:last-child { grid-column: auto; }
  .mono-profit-rule { grid-template-columns: 1fr; }
  .mono-profit-rule > i { transform: rotate(90deg); text-align: center; }
  .mono-next { grid-template-columns: 1fr; }
  .mono-efficiency-grid { grid-template-columns: 1fr; }
  .mono-scale-diagrams { grid-template-columns: 1fr; }
  .pc-paired-diagrams,
  .pc-two-notes { grid-template-columns: 1fr; }
}

@media (max-width: 620px) {
  .mono-page { font-size: .92rem; }
  .mono-hero,
  .mono-progress-strip,
  .mono-layout { width: min(100% - 24px, 1180px); }
  .mono-hero { border-radius: 15px; padding: 1.35rem; }
  .mono-hero h1 { font-size: clamp(2.35rem, 13vw, 3.2rem); }
  .mono-hero__actions .btn { width: 100%; }
  .mono-progress-strip { gap: .65rem; padding: .75rem; }
  .mono-progress-strip > div:first-child { display: grid; gap: 0; }
  .mono-chapter,
  .mono-video-library { border-radius: 14px; padding: 1rem; }
  .mono-chapter__head { grid-template-columns: 44px minmax(0, 1fr); }
  .mono-chapter__number { width: 42px; height: 42px; font-size: .9rem; }
  .mono-complete { grid-column: 1 / -1; justify-self: start; }
  .mono-definition-grid,
  .mono-performance-grid,
  .mono-barriers,
  .mono-check-options,
  .mono-essay-steps,
  .mono-video-grid { grid-template-columns: 1fr; }
  .mono-definition-grid article:last-child,
  .mono-performance-grid article:last-child { grid-column: auto; }
  .mono-explain,
  .mono-quick-check { grid-template-columns: 1fr; }
  .mono-explain > p:last-child,
  .mono-quick-check > p { grid-column: auto; }
  .mono-subhead { display: grid; gap: .55rem; align-items: start; }
  .mono-barriers p { margin-left: 0; }
  .mono-worked-number { grid-template-columns: 1fr; }
  .mono-worked-number [data-profit-answer] { grid-column: auto; grid-template-columns: 1fr; }
  .mono-share-inputs { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .mono-download-panel { grid-template-columns: 1fr; text-align: center; }
  .mono-download-panel img { max-height: 120px; }
  .mono-download-panel > div > div { justify-content: center; }
  .mono-video-grid article { grid-template-columns: 38px minmax(0, 1fr); }
  .mono-video-grid em { grid-column: 2; justify-self: start; }
  .mono-answer-status { grid-template-columns: 34px minmax(0, 1fr); }
  .mono-answer-status > em,
  .mono-answer-status > a { grid-column: 2; justify-self: start; }
  .mono-builder-targets { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .mono-builder-targets button { min-height: 48px; }
  .mono-builder-actions { display: grid; grid-template-columns: 1fr; }
  .mono-builder-actions .btn { width: 100%; }
  .mono-lab-slider { grid-template-columns: 1fr 44px; }
  .mono-lab-slider span { grid-column: 1 / -1; }
  .mono-scale-card header { grid-template-columns: 1fr; }
  .mono-scale-card header strong { justify-self: start; }
  .mono-scale-chain { display: grid; justify-items: start; }
  .mono-scale-chain i { transform: rotate(90deg); justify-self: center; }
}

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