:root {
  --bg: #ffffff;
  --panel: #ffffff;
  --panel-strong: #ffffff;
  --text: #0f1419;
  --muted: #536471;
  --line: #e2e8f0;
  --line-strong: #cbd5e1;
  --accent: #0d9488;
  --accent-soft: #f0fdfa;
  --shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
  --radius: 22px;
  --chart-bg: #ffffff;
  --header-bg: rgba(255, 255, 255, 0.96);
  --hero-bg: linear-gradient(145deg, #f7fbfb 0%, #ebf7f4 46%, #fdf8ef 100%);
  --hero-text: #0f1f1d;
  --hero-muted: #44615d;
  --hero-border: rgba(13, 148, 136, 0.12);
  --hero-panel-bg: rgba(255, 255, 255, 0.82);
  --hero-panel-border: rgba(13, 148, 136, 0.14);
  --hero-panel-accent: #0d9488;
  --hero-panel-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.7);
  --hero-button-bg: rgba(255, 255, 255, 0.76);
  --hero-button-border: rgba(13, 148, 136, 0.14);
  --hero-button-text: #17312f;
}

html[data-theme="dark"] {
  color-scheme: only dark;
  --bg: #0d1522;
  --panel: #161b22;
  --panel-strong: #161b22;
  --text: #e6edf3;
  --muted: #8b949e;
  --line: #30363d;
  --line-strong: #484f58;
  --accent: #2dd4bf;
  --accent-soft: rgba(45, 212, 191, 0.08);
  --shadow: 0 10px 30px rgba(0, 0, 0, 0.45);
  --chart-bg: #161b22;
  --header-bg: rgba(13, 21, 34, 0.92);
  --hero-bg: linear-gradient(145deg, #09111f 0%, #0f2a2b 55%, #09111f 100%);
  --hero-text: #f0f6fc;
  --hero-muted: rgba(240, 246, 252, 0.72);
  --hero-border: rgba(255, 255, 255, 0.08);
  --hero-panel-bg: rgba(11, 18, 32, 0.52);
  --hero-panel-border: rgba(196, 208, 224, 0.18);
  --hero-panel-accent: #7dd3c7;
  --hero-panel-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.04);
  --hero-button-bg: rgba(255, 255, 255, 0.06);
  --hero-button-border: rgba(255, 255, 255, 0.16);
  --hero-button-text: #f0f6fc;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  color-scheme: only light;
  -webkit-text-size-adjust: 100%;
}

html[data-theme="light"] {
  color-scheme: only light;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Manrope", system-ui, sans-serif;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: background 0.25s ease, color 0.25s ease;
}

a {
  color: inherit;
}

button,
a.button {
  font: inherit;
}

.shell {
  width: min(1180px, calc(100vw - 32px));
  margin: 0 auto;
}

.topbar,
.footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 22px 0;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  background: var(--header-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--line);
}

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  color: var(--muted);
}

.nav a,
.footer a {
  text-decoration: none;
}

.eyebrow {
  margin: 0 0 8px;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.72rem;
  color: var(--accent);
  font-weight: 700;
}

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

h1,
h2,
h3,
.definition-details summary span:last-child {
  font-family: "Newsreader", Georgia, serif;
}

h1 {
  font-size: clamp(2rem, 3vw, 3.1rem);
  margin-bottom: 0;
}

h2 {
  font-size: clamp(1.8rem, 3vw, 2.8rem);
  line-height: 1.04;
  margin-bottom: 16px;
}

h3 {
  font-size: clamp(1.3rem, 2vw, 1.8rem);
  margin-bottom: 0;
}

.app {
  display: grid;
  gap: 18px;
  padding-bottom: 40px;
}

.card {
  position: relative;
  overflow: hidden;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  box-shadow: var(--shadow);
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(280px, 0.85fr);
  gap: 20px;
  align-items: start;
  background: var(--hero-bg);
  border-color: var(--hero-border);
  color: var(--hero-text);
  box-shadow: 0 22px 44px rgba(8, 15, 28, 0.18);
}

.hero-copy {
  max-width: 46rem;
}

.hero-copy h2 {
  max-width: 14ch;
}

.hero .cta-row {
  margin-top: 18px;
}

.lede,
.small-copy,
.method-copy p {
  color: var(--muted);
  line-height: 1.55;
}

.cta-row,
.chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.button,
.chip {
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--panel-strong);
  color: var(--text);
  text-decoration: none;
  transition: transform 140ms ease, border-color 140ms ease, background 140ms ease;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 11px 16px;
}

.button.primary,
.chip.active {
  background: var(--accent-soft);
  border-color: var(--accent);
}

.button:hover,
.chip:hover {
  transform: translateY(-1px);
}

.button.subtle {
  background: transparent;
}

.hero-metrics {
  display: grid;
  gap: 12px;
  align-self: stretch;
}

.hero .lede,
.hero .small-copy,
.hero .method-copy p {
  color: var(--hero-muted);
}

.hero .button {
  color: var(--hero-button-text);
  background: var(--hero-button-bg);
  border-color: var(--hero-button-border);
}

.hero .button.primary {
  color: #0f172a;
  background: var(--accent);
  border-color: var(--accent);
}

.metric,
.metric.placeholder {
  padding: 16px;
  border-radius: 18px;
  background: var(--panel-strong);
  border: 1px solid var(--line);
}

.metric strong {
  display: block;
  font-size: 1.5rem;
  margin-top: 6px;
}

.hero .metric,
.hero .metric.placeholder {
  background: var(--hero-panel-bg);
  border-color: var(--hero-panel-border);
  color: var(--hero-text);
  box-shadow: var(--hero-panel-shadow);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.hero .metric .eyebrow {
  color: var(--hero-panel-accent);
}

.hero .metric strong,
.hero .metric.placeholder {
  color: var(--hero-text);
}

.hero .metric .small-copy {
  color: var(--hero-muted);
}

.controls {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.definition-panel {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  padding: 6px 0 2px;
}

.definition-details summary {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  cursor: pointer;
  list-style: none;
  padding: 10px 0;
}

.definition-details summary::-webkit-details-marker {
  display: none;
}

.definition-body {
  padding: 10px 0 6px;
}

.equation-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  margin-top: 18px;
}

.definition-switcher {
  margin-top: 18px;
}

.definition-radio {
  position: absolute;
  inline-size: 1px;
  block-size: 1px;
  opacity: 0;
  pointer-events: none;
}

.definition-tab {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin: 0 8px 12px 0;
  padding: 10px 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--panel-strong);
  color: var(--muted);
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.01em;
  cursor: pointer;
  transition: background 140ms ease, border-color 140ms ease, color 140ms ease, transform 140ms ease;
}

.definition-tab:hover {
  transform: translateY(-1px);
  border-color: var(--accent);
  color: var(--text);
}

#identity-deposit:checked + .definition-tab,
#identity-reserve:checked + .definition-tab,
#identity-money:checked + .definition-tab {
  background: var(--accent-soft);
  border-color: var(--accent);
  color: var(--accent);
}

.definition-panels {
  position: relative;
}

.definition-view {
  display: none;
  margin-top: 8px;
}

#identity-deposit:checked ~ .definition-panels .definition-view[data-identity="deposit"],
#identity-reserve:checked ~ .definition-panels .definition-view[data-identity="reserve"],
#identity-money:checked ~ .definition-panels .definition-view[data-identity="money"] {
  display: block;
}

.definition-view-head {
  display: grid;
  gap: 6px;
  margin-bottom: 8px;
}

.definition-view-head .eyebrow {
  margin-bottom: 0;
}

.definition-view-head .small-copy {
  margin-bottom: 0;
}

.equation-card {
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--panel-strong);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.08);
}

.equation-display {
  margin-top: 10px;
  padding: 16px 18px;
  border-radius: 16px;
  background: linear-gradient(180deg, color-mix(in srgb, var(--accent-soft) 65%, var(--panel-strong)) 0%, var(--panel-strong) 100%);
  border: 1px solid color-mix(in srgb, var(--accent) 18%, var(--line));
  overflow-x: auto;
}

.equation-display math {
  width: 100%;
  color: var(--text);
  font-size: 1.05rem;
}

.equation-display mtext,
.equation-display mi,
.equation-display mn,
.equation-display mo {
  font-family: "Newsreader", Georgia, serif;
}

.definition-list {
  display: grid;
  gap: 10px;
  margin-top: 14px;
  padding-top: 14px;
  border-top: 1px solid var(--line);
}

.symbol-item {
  display: grid;
  grid-template-columns: minmax(112px, 140px) minmax(0, 1fr);
  gap: 12px;
  align-items: start;
}

.symbol-item p {
  margin: 0;
  color: var(--muted);
  line-height: 1.55;
}

.symbol-term {
  color: var(--text);
  font-family: "SFMono-Regular", Menlo, monospace;
  font-size: 0.84rem;
  font-weight: 600;
  letter-spacing: 0.01em;
}

.definition-note {
  margin-top: 18px;
}

.span-2 {
  grid-column: span 2;
}

.label {
  display: block;
  font-size: 0.82rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--muted);
  margin-bottom: 10px;
}

.check-row {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  font-weight: 600;
}

.check-row input {
  inline-size: 16px;
  block-size: 16px;
  accent-color: var(--accent);
}

.range-inputs {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.date-field {
  display: grid;
  gap: 6px;
  color: var(--muted);
  font-size: 0.88rem;
}

.date-field input {
  inline-size: 100%;
  min-block-size: 42px;
  padding: 10px 12px;
  border-radius: 14px;
  border: 1px solid var(--line);
  background: var(--panel-strong);
  color: var(--text);
}

.chip {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  cursor: pointer;
}

.chip.active {
  color: var(--accent);
}

.chip.inactive {
  opacity: 0.58;
}

.chip.focused {
  box-shadow: inset 0 0 0 1px rgba(20, 33, 61, 0.18);
}

.chip-swatch {
  inline-size: 10px;
  block-size: 10px;
  border-radius: 999px;
  flex: 0 0 auto;
}

.chip-text {
  white-space: nowrap;
}

.series-detail {
  margin-top: 14px;
  padding: 16px 18px;
  border: 1px solid var(--line-strong);
  border-radius: 18px;
  background: var(--panel-strong);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.08);
}

.series-detail h4 {
  margin-bottom: 10px;
  color: var(--text);
}

.series-detail p:last-child {
  margin-bottom: 0;
}

.series-detail .small-copy {
  color: var(--muted);
}

#series-formula {
  color: var(--text);
  font-family: "SFMono-Regular", Menlo, monospace;
  font-size: 0.9rem;
  line-height: 1.6;
}

.section-heading {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 18px;
}

#line-chart-note {
  margin-bottom: 14px;
}

.chart-frame {
  width: 100%;
  min-height: 420px;
}

.chart-frame.compact {
  min-height: 320px;
}

canvas {
  width: 100%;
  height: 100%;
  display: block;
}

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

.equation-block {
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--panel-strong);
  overflow-x: auto;
  margin-bottom: 18px;
}

.theme-toggle {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--text);
  background: var(--panel-strong);
  border: 2px solid var(--line-strong);
  box-shadow: 0 1px 3px rgba(0,0,0,0.06);
  flex-shrink: 0;
}

.theme-toggle:hover {
  background: var(--accent-soft);
  color: var(--accent);
  border-color: var(--accent);
}

.equation-block p {
  margin: 0;
  color: var(--text);
  line-height: 1.5;
}

.equation-block p + p {
  margin-top: 10px;
}

.table-wrap {
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.95rem;
}

th,
td {
  text-align: left;
  vertical-align: top;
  padding: 10px 8px;
  border-bottom: 1px solid var(--line);
}

th {
  color: var(--muted);
  font-weight: 700;
}

code {
  font-family: "SFMono-Regular", Menlo, monospace;
  font-size: 0.88em;
}

.empty-state {
  padding: 18px;
  border-radius: 18px;
  border: 1px dashed var(--line);
  background: var(--panel-strong);
}

html[data-theme="dark"] .series-detail,
html[data-theme="dark"] .equation-card,
html[data-theme="dark"] .equation-block,
html[data-theme="dark"] .empty-state {
  background: #111827;
  border-color: #334155;
  box-shadow: none;
}

html[data-theme="dark"] .series-detail .small-copy,
html[data-theme="dark"] .symbol-item p {
  color: #cbd5e1;
}

html[data-theme="dark"] .symbol-term {
  color: #f8fafc;
}

html[data-theme="dark"] #series-formula {
  color: #f8fafc;
}

html[data-theme="dark"] .equation-display {
  background: linear-gradient(180deg, rgba(45, 212, 191, 0.08) 0%, #111827 100%);
  border-color: #334155;
}

html[data-theme="dark"] .equation-display math {
  color: #f8fafc;
}

html[data-theme="dark"] .definition-tab {
  background: #111827;
  border-color: #334155;
  color: #cbd5e1;
}

html[data-theme="dark"] .definition-tab:hover {
  border-color: #2dd4bf;
  color: #f8fafc;
}

html[data-theme="dark"] #identity-deposit:checked + .definition-tab,
html[data-theme="dark"] #identity-reserve:checked + .definition-tab,
html[data-theme="dark"] #identity-money:checked + .definition-tab {
  background: rgba(45, 212, 191, 0.12);
  border-color: #2dd4bf;
  color: #5eead4;
}

@media (max-width: 900px) {
  .hero,
  .controls,
  .equation-grid,
  .source-grid,
  .grid-2,
  .topbar,
  .footer {
    grid-template-columns: 1fr;
    flex-direction: column;
    align-items: flex-start;
  }

  .controls {
    grid-template-columns: 1fr;
  }

  .range-inputs {
    grid-template-columns: 1fr;
  }

  .span-2 {
    grid-column: auto;
  }

  .symbol-item {
    grid-template-columns: 1fr;
    gap: 4px;
  }

  .definition-tab {
    display: flex;
    inline-size: 100%;
    margin-right: 0;
  }
}