:root {
  --ink: #17201b;
  --muted: #5c6861;
  --line: #d9e2dc;
  --paper: #f7faf6;
  --panel: #ffffff;
  --leaf: #226b4f;
  --blue: #2f6ca3;
  --gold: #c8972c;
  --rose: #d86658;
  --mint: #e8f5ee;
  --sky: #eef6ff;
  --cream: #fff8e7;
  --shadow: 0 20px 50px rgba(36, 48, 40, 0.12);
  --font: Arial, Helvetica, sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: var(--font);
  line-height: 1.5;
}

a {
  color: inherit;
}

.skip-link {
  position: absolute;
  top: -4rem;
  left: 1rem;
  padding: 0.75rem 1rem;
  background: var(--ink);
  color: #fff;
  z-index: 10;
}

.skip-link:focus {
  top: 1rem;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 4;
  border-bottom: 1px solid var(--line);
  background: rgba(247, 250, 246, 0.94);
  backdrop-filter: blur(12px);
}

.nav {
  max-width: 1180px;
  min-height: 70px;
  margin: 0 auto;
  padding: 0 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand,
.nav-links,
.actions,
.footer-links,
.result-row,
.chart-legend,
.formula-line {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.brand,
.nav-links a,
.button,
.tool-card {
  text-decoration: none;
}

.brand {
  font-weight: 800;
  font-size: 1.05rem;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border-radius: 8px;
  background: var(--ink);
  color: #fff;
  font-size: 0.82rem;
}

.nav-links a {
  color: var(--muted);
  font-weight: 700;
  font-size: 0.95rem;
}

.nav-links a:hover {
  color: var(--ink);
}

.hero-tool {
  max-width: 1180px;
  margin: 0 auto;
  padding: 3rem 1.25rem 2.5rem;
  display: grid;
  grid-template-columns: minmax(300px, 0.82fr) minmax(360px, 1.18fr);
  gap: 1.5rem;
  align-items: start;
}

.hero-copy {
  padding-top: 1rem;
}

.eyebrow {
  margin: 0 0 0.5rem;
  color: var(--leaf);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  overflow-wrap: anywhere;
}

h1 {
  margin: 0 0 1rem;
  max-width: 680px;
  font-size: clamp(2.25rem, 5.6vw, 5.35rem);
  line-height: 0.98;
}

h2 {
  margin: 0 0 0.65rem;
  font-size: clamp(1.6rem, 3vw, 2.7rem);
  line-height: 1.05;
}

h3 {
  margin: 0 0 0.45rem;
  font-size: 1.1rem;
}

.hero-copy p,
.section-heading p,
.tool-card p,
.legal-page p,
.output p {
  color: var(--muted);
}

.actions {
  flex-wrap: wrap;
  margin-top: 1.25rem;
}

.button {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.72rem 1rem;
  border: 1px solid var(--ink);
  border-radius: 8px;
  font-weight: 800;
  cursor: pointer;
}

.button.primary {
  background: var(--ink);
  color: #fff;
}

.button.secondary {
  background: var(--panel);
}

.calculator-shell {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.calculator-form {
  padding: 1rem;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.85rem;
}

label {
  display: grid;
  gap: 0.4rem;
  color: var(--muted);
  font-size: 0.9rem;
  font-weight: 750;
}

input,
select {
  width: 100%;
  min-height: 46px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  color: var(--ink);
  font: inherit;
  font-weight: 700;
  padding: 0.68rem 0.75rem;
}

.calculator-form .button,
.wide,
.output {
  grid-column: 1 / -1;
}

.output {
  display: grid;
  gap: 0.85rem;
  border-top: 1px solid var(--line);
  background: #fbfdfb;
  padding: 1rem;
}

.result-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.75rem;
}

.result-tile,
.tool-card,
.formula-card,
.mini-panel {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
}

.result-tile {
  padding: 0.85rem;
}

.result-tile strong {
  display: block;
  font-size: clamp(1.25rem, 2.4vw, 2rem);
}

.result-tile span {
  color: var(--muted);
  font-size: 0.86rem;
}

.chart-wrap {
  border-top: 1px solid var(--line);
  background: linear-gradient(180deg, #fff, var(--mint));
  padding: 1rem;
}

.perspective-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(260px, 0.8fr);
  gap: 1rem;
  border-top: 1px solid var(--line);
  background: #fbfdfb;
  padding: 1rem;
}

.chart-panel {
  min-width: 0;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  padding: 1rem;
}

.chart-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 0.75rem;
}

.chart-head span,
.chart-legend span {
  color: var(--muted);
  font-size: 0.9rem;
}

#growthChart svg,
#outcomeChart svg,
#breakdownChart svg {
  display: block;
  width: 100%;
  height: auto;
}

.chart-grid {
  stroke: rgba(23, 32, 27, 0.13);
  stroke-dasharray: 5 8;
}

.chart-area {
  fill: rgba(34, 107, 79, 0.16);
}

.chart-line {
  fill: none;
  stroke: var(--leaf);
  stroke-width: 6;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.chart-dot {
  fill: var(--panel);
  stroke: var(--ink);
  stroke-width: 3;
}

.contrib-line {
  stroke: var(--gold);
  stroke-width: 4;
  stroke-linecap: round;
  stroke-dasharray: 9 8;
}

.outcome-line {
  fill: none;
  stroke-width: 5;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.outcome-line.conservative,
.outcome-dot.conservative {
  stroke: var(--blue);
  fill: var(--blue);
}

.outcome-line.base,
.outcome-dot.base {
  stroke: var(--leaf);
  fill: var(--leaf);
}

.outcome-line.optimistic,
.outcome-dot.optimistic {
  stroke: var(--rose);
  fill: var(--rose);
}

.outcome-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.65rem;
  margin-top: 0.8rem;
}

.outcome-pill {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 0.72rem;
  background: var(--paper);
}

.outcome-pill strong,
.outcome-pill span {
  display: block;
}

.outcome-pill span {
  color: var(--muted);
  font-size: 0.84rem;
}

.breakdown-track {
  fill: #edf2ee;
}

.breakdown-contributed {
  fill: var(--gold);
}

.breakdown-interest {
  fill: var(--leaf);
}

#breakdownChart text {
  fill: var(--ink);
  font-family: var(--font);
  font-size: 20px;
  font-weight: 700;
}

.section {
  max-width: 1180px;
  margin: 0 auto;
  padding: 3.5rem 1.25rem;
}

.section.band {
  max-width: none;
  background: var(--sky);
}

.section.band > * {
  max-width: 1180px;
  margin-left: auto;
  margin-right: auto;
}

.section-heading {
  max-width: 760px;
  margin-bottom: 1.5rem;
}

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

.tool-card,
.formula-card,
.mini-panel {
  padding: 1rem;
}

.tool-card {
  display: grid;
  gap: 0.45rem;
}

.tool-card:hover {
  border-color: var(--leaf);
}

.formula-grid {
  display: grid;
  grid-template-columns: minmax(300px, 0.8fr) minmax(320px, 1.2fr);
  gap: 1rem;
}

.formula-card code,
.formula-line code {
  display: inline-block;
  padding: 0.28rem 0.42rem;
  border-radius: 6px;
  background: var(--cream);
  font-family: Consolas, "Liberation Mono", monospace;
  font-weight: 700;
}

.mini-form {
  display: grid;
  gap: 0.8rem;
}

.mini-output {
  min-height: 96px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--mint);
  padding: 1rem;
}

.legal-page {
  max-width: 820px;
  margin: 0 auto;
  padding: 3rem 1.25rem;
}

.footer {
  border-top: 1px solid var(--line);
  background: var(--panel);
}

.footer-inner {
  max-width: 1180px;
  min-height: 100px;
  margin: 0 auto;
  padding: 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.footer-links {
  flex-wrap: wrap;
}

.footer-links a {
  color: var(--muted);
  font-weight: 700;
}

@media (max-width: 980px) {
  .hero-tool,
  .formula-grid,
  .perspective-grid {
    grid-template-columns: 1fr;
  }

  .hero-copy {
    padding-top: 0;
  }

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

@media (max-width: 760px) {
  .nav,
  .footer-inner {
    align-items: flex-start;
    flex-direction: column;
  }

  .nav-links {
    flex-wrap: wrap;
  }

  .hero-tool {
    padding-top: 2rem;
  }

  h1 {
    font-size: clamp(2.15rem, 14vw, 3.2rem);
  }

  .calculator-form,
  .tool-grid,
  .result-grid {
    grid-template-columns: 1fr;
  }

  .chart-head,
  .chart-legend {
    align-items: flex-start;
    flex-direction: column;
  }

  .outcome-list {
    grid-template-columns: 1fr;
  }
}