:root {
  --bg: #f4eee6;
  --surface: rgba(255, 251, 246, 0.8);
  --surface-strong: rgba(255, 251, 246, 0.94);
  --line: rgba(25, 25, 25, 0.09);
  --ink: #1f1d1a;
  --muted: #61584f;
  --accent: #0f766e;
  --accent-strong: #0a5a54;
  --accent-soft: rgba(15, 118, 110, 0.12);
  --rust: #c56a35;
  --rust-soft: rgba(197, 106, 53, 0.12);
  --shadow: 0 24px 80px rgba(62, 41, 21, 0.14);
  --radius-xl: 28px;
  --radius-lg: 22px;
  --radius-md: 16px;
  --mono: "IBM Plex Mono", monospace;
  --body: "Manrope", sans-serif;
  --display: "Syne", sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--body);
  color: var(--ink);
  background:
    radial-gradient(circle at top left, rgba(15, 118, 110, 0.14), transparent 30%),
    radial-gradient(circle at top right, rgba(197, 106, 53, 0.16), transparent 32%),
    linear-gradient(180deg, #fbf5ef 0%, #f1e7db 100%);
}

button,
input,
label {
  font: inherit;
}

button {
  cursor: pointer;
}

a {
  color: inherit;
}

.page-shell {
  position: relative;
  width: min(1200px, calc(100vw - 32px));
  margin: 0 auto;
  padding: 32px 0 64px;
}

.ambient {
  position: fixed;
  inset: auto;
  pointer-events: none;
  filter: blur(80px);
  opacity: 0.45;
  z-index: 0;
}

.ambient-a {
  top: 8%;
  left: 3%;
  width: 260px;
  height: 260px;
  background: rgba(15, 118, 110, 0.18);
}

.ambient-b {
  top: 18%;
  right: 6%;
  width: 320px;
  height: 320px;
  background: rgba(197, 106, 53, 0.16);
}

.grid-overlay {
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(0, 0, 0, 0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 0, 0, 0.025) 1px, transparent 1px);
  background-size: 28px 28px;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.28), transparent 78%);
  pointer-events: none;
}

.hero,
.control-bar,
.stage-nav,
.stage,
.sources-card,
.surface-card {
  position: relative;
  z-index: 1;
}

.hero {
  display: grid;
  grid-template-columns: 1.3fr 0.9fr;
  gap: 24px;
  align-items: stretch;
  margin-bottom: 24px;
}

.hero-copy,
.hero-panel,
.surface-card,
.progress-card {
  background: var(--surface);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  backdrop-filter: blur(20px);
}

.hero-copy {
  padding: 32px;
  border-radius: var(--radius-xl);
}

.hero-panel {
  padding: 28px;
  border-radius: var(--radius-xl);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.eyebrow,
.section-label,
.panel-chip {
  margin: 0 0 10px;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  font-size: 0.72rem;
  font-family: var(--mono);
  color: var(--accent-strong);
}

.hero h1,
.section-heading h2,
.stack-header h3,
.quiz-card h3,
.sim-card h3,
.sources-header h3,
.desk-map-card h3,
.frontier-card h3 {
  margin: 0;
  font-family: var(--display);
  line-height: 0.95;
}

.hero h1 {
  max-width: 9ch;
  font-size: clamp(3rem, 6vw, 5.6rem);
  letter-spacing: -0.06em;
}

.lede,
.section-note,
.hero-panel p,
.stack-header p,
.sim-copy,
.sources-header p {
  color: var(--muted);
  line-height: 1.65;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 28px 0 24px;
}

.primary-button,
.ghost-button,
.track-button,
.stage-button,
.complete-button {
  border: 0;
  border-radius: 999px;
  transition: transform 180ms ease, background 180ms ease, color 180ms ease, border-color 180ms ease;
}

.primary-button {
  padding: 14px 20px;
  background: var(--ink);
  color: #fff9f1;
}

.ghost-button {
  padding: 14px 20px;
  background: rgba(255, 255, 255, 0.45);
  color: var(--ink);
  border: 1px solid var(--line);
}

.primary-button:hover,
.ghost-button:hover,
.track-button:hover,
.stage-button:hover,
.complete-button:hover {
  transform: translateY(-2px);
}

.hero-metrics {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
}

.metric-box {
  padding: 14px;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.54);
  border: 1px solid rgba(0, 0, 0, 0.05);
}

.metric-box span,
.panel-stats span,
.insight-strip span,
.cadence-footer span,
.sim-metric span,
.desk-pillar span,
.source-card span {
  display: block;
  margin-bottom: 6px;
  color: var(--muted);
  font-size: 0.82rem;
}

.metric-box strong,
.panel-stats strong,
.insight-strip strong,
.cadence-footer strong,
.sim-metric strong,
.desk-pillar strong,
.source-card strong {
  font-size: 1rem;
}

.panel-chip {
  display: inline-flex;
  width: fit-content;
  padding: 8px 12px;
  border-radius: 999px;
  background: var(--accent-soft);
}

.hero-panel h2 {
  margin: 0 0 12px;
  font-size: clamp(1.7rem, 3vw, 2.4rem);
  font-family: var(--display);
  line-height: 1.02;
}

.panel-stats,
.insight-strip {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.panel-stats > div,
.insight-strip > div {
  padding: 14px;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.42);
  border: 1px solid rgba(0, 0, 0, 0.05);
}

.control-bar {
  display: grid;
  grid-template-columns: 1.3fr 0.7fr;
  gap: 16px;
  margin-bottom: 16px;
}

.track-block,
.progress-card {
  padding: 18px 20px;
  border-radius: var(--radius-lg);
}

.track-block {
  background: var(--surface-strong);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  backdrop-filter: blur(16px);
}

.track-picker {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.track-button {
  padding: 12px 16px;
  background: rgba(255, 255, 255, 0.6);
  border: 1px solid transparent;
  color: var(--muted);
}

.track-button.active {
  color: #fefaf4;
  background: linear-gradient(120deg, var(--accent-strong), #093d39);
}

.progress-copy {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.progress-bar {
  margin-top: 14px;
  height: 10px;
  border-radius: 999px;
  background: rgba(0, 0, 0, 0.08);
  overflow: hidden;
}

.progress-bar span {
  display: block;
  height: 100%;
  width: 0%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--rust), var(--accent));
  transition: width 220ms ease;
}

.stage-nav {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
  margin-bottom: 20px;
}

.stage-button {
  padding: 16px;
  background: rgba(255, 255, 255, 0.5);
  border: 1px solid var(--line);
  color: var(--muted);
  box-shadow: 0 14px 32px rgba(84, 54, 20, 0.08);
}

.stage-button.active {
  color: var(--ink);
  background: var(--surface-strong);
  border-color: rgba(15, 118, 110, 0.3);
}

.stage-stack {
  display: block;
}

.stage {
  display: none;
  animation: float-in 320ms ease forwards;
}

.stage.active {
  display: block;
}

.section-heading {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  align-items: end;
  margin-bottom: 18px;
}

.section-heading h2 {
  font-size: clamp(2rem, 4vw, 3.25rem);
  letter-spacing: -0.05em;
}

.section-note {
  max-width: 42ch;
}

.surface-card {
  padding: 24px;
  border-radius: var(--radius-lg);
}

.intro-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 16px;
  margin-bottom: 16px;
}

.pull-quote h3 {
  margin: 0 0 10px;
  font-size: clamp(1.5rem, 3vw, 2.4rem);
  font-family: var(--display);
  line-height: 1.02;
}

.pull-quote p,
.what-is-quant p {
  color: var(--muted);
  line-height: 1.7;
}

.signal-list,
.cadence-list {
  margin: 0;
  padding-left: 18px;
  color: var(--muted);
  line-height: 1.8;
}

.signal-list li + li,
.cadence-list li + li {
  margin-top: 6px;
}

.stack-board,
.topdown-map,
.sources-card {
  margin-top: 16px;
}

.stack-header,
.sources-header {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 18px;
}

.stack-header h3,
.sources-header h3 {
  font-size: clamp(1.7rem, 3vw, 2.4rem);
}

.stack-grid,
.module-grid,
.glossary-grid,
.desk-pillars,
.frontier-list,
.sources-grid {
  display: grid;
  gap: 14px;
}

.stack-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.stack-item,
.module-card,
.glossary-card,
.desk-pillar,
.source-card {
  padding: 18px;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.55);
  border: 1px solid rgba(0, 0, 0, 0.06);
}

.stack-item h4,
.module-card h3,
.glossary-card h4,
.source-card strong {
  margin: 0 0 10px;
}

.stack-item h4,
.module-card h3,
.glossary-card h4 {
  font-size: 1.1rem;
}

.stack-item p,
.module-card p,
.module-card li,
.glossary-card p,
.source-card p {
  color: var(--muted);
  line-height: 1.6;
}

.stack-item code {
  font-family: var(--mono);
  font-size: 0.82rem;
  display: inline-flex;
  padding: 5px 8px;
  margin: 6px 6px 0 0;
  border-radius: 999px;
  background: rgba(15, 118, 110, 0.08);
}

.path-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}

.path-grid article {
  padding: 18px;
  border-radius: var(--radius-md);
  background: linear-gradient(180deg, rgba(15, 118, 110, 0.06), rgba(255, 255, 255, 0.45));
  border: 1px solid rgba(0, 0, 0, 0.06);
}

.path-grid span {
  display: inline-flex;
  width: 34px;
  height: 34px;
  align-items: center;
  justify-content: center;
  margin-bottom: 12px;
  border-radius: 50%;
  background: var(--ink);
  color: #fff9f1;
  font-family: var(--mono);
}

.beginner-layout,
.lab-layout,
.master-layout {
  display: grid;
  gap: 16px;
}

.beginner-layout {
  grid-template-columns: 1.3fr 0.7fr;
}

.module-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.module-card {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.module-card ul {
  margin: 0;
  padding-left: 18px;
}

.module-topline {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: start;
}

.complete-button {
  padding: 10px 14px;
  background: rgba(15, 118, 110, 0.08);
  color: var(--accent-strong);
}

.complete-button.completed {
  background: linear-gradient(120deg, var(--accent-strong), #093d39);
  color: #fffaf2;
}

.track-focus {
  padding: 10px 12px;
  border-radius: 14px;
  background: var(--rust-soft);
  color: var(--ink);
  font-size: 0.9rem;
}

.cadence-card {
  height: fit-content;
  position: sticky;
  top: 18px;
}

.cadence-card h3 {
  margin: 0 0 12px;
  font-size: 1.6rem;
  font-family: var(--display);
}

.cadence-footer {
  margin-top: 18px;
  padding: 16px;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.5);
}

.lab-layout {
  grid-template-columns: 0.9fr 1.1fr;
  align-items: start;
}

.quiz-form {
  display: grid;
  gap: 16px;
  margin-top: 16px;
}

.quiz-question {
  padding: 16px;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.5);
  border: 1px solid rgba(0, 0, 0, 0.06);
}

.quiz-question legend {
  margin-bottom: 10px;
  font-weight: 700;
}

.option-row {
  display: flex;
  gap: 10px;
  align-items: start;
}

.option-row + .option-row {
  margin-top: 8px;
}

.option-row input {
  margin-top: 4px;
}

.quiz-actions {
  display: flex;
  gap: 10px;
  margin-top: 18px;
}

.quiz-result {
  margin-top: 18px;
  padding: 0;
  color: var(--muted);
}

.quiz-result.ready {
  padding: 18px;
  border-radius: var(--radius-md);
  background: rgba(15, 118, 110, 0.08);
  border: 1px solid rgba(15, 118, 110, 0.16);
}

.quiz-result strong {
  color: var(--ink);
}

.sim-controls {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin: 20px 0;
}

.sim-controls label {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 14px;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.52);
  border: 1px solid rgba(0, 0, 0, 0.06);
}

.sim-controls strong {
  font-family: var(--mono);
  font-size: 0.92rem;
  color: var(--accent-strong);
}

input[type="range"] {
  width: 100%;
  accent-color: var(--rust);
}

.sim-metrics {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
}

.sim-metric {
  padding: 14px;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.58);
  border: 1px solid rgba(0, 0, 0, 0.06);
}

.chart-frame {
  margin-top: 18px;
  padding: 16px;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.46);
  border: 1px solid rgba(0, 0, 0, 0.06);
}

#equity-chart {
  width: 100%;
  height: 260px;
  display: block;
}

.glossary-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
  margin-top: 16px;
}

.glossary-card {
  min-height: 180px;
}

.glossary-card p {
  margin-bottom: 0;
}

.master-layout {
  grid-template-columns: 0.92fr 1.08fr;
}

.desk-pillars,
.frontier-list,
.sources-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.desk-pillar {
  background: linear-gradient(180deg, rgba(15, 118, 110, 0.06), rgba(255, 255, 255, 0.52));
}

.frontier-theme {
  padding: 18px;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.55);
  border: 1px solid rgba(0, 0, 0, 0.06);
}

.frontier-theme h4 {
  margin: 0 0 8px;
}

.frontier-theme p {
  margin: 0;
  color: var(--muted);
  line-height: 1.6;
}

.source-card {
  text-decoration: none;
  transition: transform 180ms ease, border-color 180ms ease, background 180ms ease;
}

.source-card:hover {
  transform: translateY(-2px);
  border-color: rgba(15, 118, 110, 0.26);
  background: rgba(255, 255, 255, 0.72);
}

.source-card p {
  margin: 0;
}

@keyframes float-in {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 1024px) {
  .hero,
  .control-bar,
  .intro-grid,
  .beginner-layout,
  .lab-layout,
  .master-layout,
  .stack-header,
  .sources-header,
  .section-heading {
    grid-template-columns: 1fr;
    display: grid;
  }

  .path-grid,
  .stack-grid,
  .glossary-grid,
  .desk-pillars,
  .frontier-list,
  .sources-grid,
  .module-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .hero-metrics,
  .sim-metrics {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .cadence-card {
    position: static;
  }
}

@media (max-width: 720px) {
  .page-shell {
    width: min(100vw - 20px, 1200px);
    padding-top: 20px;
  }

  .hero-copy,
  .hero-panel,
  .surface-card,
  .track-block,
  .progress-card {
    padding: 20px;
  }

  .stage-nav,
  .path-grid,
  .stack-grid,
  .module-grid,
  .glossary-grid,
  .desk-pillars,
  .frontier-list,
  .sources-grid,
  .sim-controls,
  .sim-metrics,
  .hero-metrics {
    grid-template-columns: 1fr;
  }

  .panel-stats,
  .insight-strip {
    grid-template-columns: 1fr;
  }

  .stage-nav {
    display: flex;
    flex-direction: column;
  }

  .track-picker {
    flex-direction: column;
  }

  .hero h1 {
    font-size: clamp(2.4rem, 14vw, 4rem);
  }
}

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