:root {
  --bg: #f6f8fb;
  --surface: #ffffff;
  --surface-soft: #eef3f8;
  --ink: #142033;
  --muted: #617083;
  --border: #d9e1ea;
  --primary: #0f766e;
  --primary-dark: #0b5f59;
  --accent: #c2410c;
  --warning: #b45309;
  --danger: #be123c;
  --success: #15803d;
  --shadow: 0 22px 55px rgba(20, 32, 51, 0.1);
  --radius: 8px;
  font-family: "Inter", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--ink);
  background: var(--bg);
}

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

body {
  margin: 0;
  min-height: 100vh;
  background:
    linear-gradient(180deg, rgba(15, 118, 110, 0.08), rgba(246, 248, 251, 0) 360px),
    var(--bg);
  color: var(--ink);
  font-size: 16px;
  line-height: 1.6;
}

a {
  color: var(--primary-dark);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.topbar,
main,
.site-footer {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
}

.topbar {
  min-height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  font-weight: 800;
  font-family: "Plus Jakarta Sans", "Inter", sans-serif;
}

.brand-mark {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  display: inline-grid;
  place-items: center;
  background: var(--primary);
  color: #fff;
}

.topnav {
  display: flex;
  align-items: center;
  gap: 18px;
  font-size: 0.95rem;
  font-weight: 700;
}

.hero {
  min-height: 430px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 360px;
  align-items: center;
  gap: 42px;
  padding: 34px 0 44px;
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.78rem;
  font-weight: 800;
}

h1,
h2,
h3 {
  font-family: "Plus Jakarta Sans", "Inter", sans-serif;
  letter-spacing: 0;
}

h1 {
  margin: 0;
  max-width: 780px;
  font-size: clamp(2.35rem, 7vw, 4.7rem);
  line-height: 0.98;
}

h2 {
  margin: 0;
  font-size: clamp(1.35rem, 2.4vw, 2rem);
  line-height: 1.15;
}

h3 {
  margin: 0;
  font-size: 1.05rem;
}

.lead {
  max-width: 720px;
  margin: 22px 0 0;
  color: var(--muted);
  font-size: 1.16rem;
}

.trust-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 26px;
}

.trust-strip span {
  border: 1px solid rgba(15, 118, 110, 0.24);
  background: rgba(255, 255, 255, 0.74);
  color: var(--primary-dark);
  border-radius: 999px;
  padding: 8px 12px;
  font-weight: 800;
  font-size: 0.9rem;
}

.hero-panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 24px;
}

.hero-panel strong {
  display: block;
  font-family: "Plus Jakarta Sans", "Inter", sans-serif;
  font-size: 1.2rem;
  margin-bottom: 10px;
}

.hero-panel p {
  margin: 0;
  color: var(--muted);
}

.calculator-shell {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 24px;
}

.mode-switch {
  display: inline-grid;
  grid-template-columns: 1fr 1fr;
  gap: 4px;
  padding: 4px;
  background: var(--surface-soft);
  border-radius: var(--radius);
  margin-bottom: 24px;
}

.mode-button {
  min-width: 130px;
  border: 0;
  border-radius: 6px;
  background: transparent;
  color: var(--muted);
  font: inherit;
  font-weight: 800;
  padding: 10px 16px;
  cursor: pointer;
}

.mode-button.is-active {
  background: var(--surface);
  color: var(--primary-dark);
  box-shadow: 0 4px 12px rgba(20, 32, 51, 0.08);
}

.calculator-grid {
  display: grid;
  grid-template-columns: 430px minmax(0, 1fr);
  gap: 24px;
}

.input-panel,
.result-panel,
.content-grid article,
.cta-band {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
}

.input-panel,
.result-panel {
  padding: 24px;
}

.section-heading {
  margin-bottom: 22px;
}

.field-grid {
  display: grid;
  gap: 16px;
}

.field {
  display: grid;
  gap: 7px;
  font-weight: 800;
}

.field span {
  font-size: 0.92rem;
}

input,
select {
  width: 100%;
  height: 46px;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0 12px;
  background: #fff;
  color: var(--ink);
  font: inherit;
}

input:focus,
select:focus,
button:focus-visible,
a:focus-visible {
  outline: 3px solid rgba(15, 118, 110, 0.24);
  outline-offset: 2px;
}

.button-row {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 22px;
}

button,
.primary-link {
  min-height: 44px;
}

.primary-button,
.secondary-button,
.primary-link {
  border-radius: 6px;
  border: 0;
  padding: 12px 16px;
  font: inherit;
  font-weight: 800;
  cursor: pointer;
}

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

.primary-button:hover,
.primary-link:hover {
  background: var(--primary-dark);
  text-decoration: none;
}

.secondary-button {
  background: var(--surface-soft);
  color: var(--ink);
}

.fine-print {
  margin: 18px 0 0;
  color: var(--muted);
  font-size: 0.88rem;
}

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

.metric-card {
  min-height: 116px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  background: var(--surface-soft);
}

.metric-card span {
  display: block;
  color: var(--muted);
  font-weight: 800;
  font-size: 0.86rem;
  margin-bottom: 10px;
}

.metric-card strong {
  display: block;
  font-family: "Plus Jakarta Sans", "Inter", sans-serif;
  font-size: clamp(1.25rem, 2.5vw, 2rem);
  line-height: 1.1;
}

.metric-card.highlight {
  background: #e9f7f5;
  border-color: rgba(15, 118, 110, 0.32);
}

.is-debt .metric-card.highlight {
  background: #fff1f2;
  border-color: rgba(190, 18, 60, 0.28);
}

.chart-card {
  margin-top: 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
}

.chart-header {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  align-items: baseline;
  margin-bottom: 14px;
}

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

.chart {
  height: 240px;
  display: flex;
  align-items: end;
  gap: 4px;
  padding-top: 12px;
  border-bottom: 1px solid var(--border);
}

.bar {
  flex: 1;
  min-width: 6px;
  border-radius: 4px 4px 0 0;
  background: linear-gradient(180deg, #14b8a6, #0f766e);
  position: relative;
}

.bar::after {
  content: attr(data-year);
  position: absolute;
  left: 50%;
  bottom: -28px;
  transform: translateX(-50%);
  color: var(--muted);
  font-size: 0.72rem;
  opacity: 0;
}

.bar:nth-child(5n)::after,
.bar:first-child::after,
.bar:last-child::after {
  opacity: 1;
}

.is-debt .bar {
  background: linear-gradient(180deg, #fb7185, #be123c);
}

.interpretation {
  margin-top: 44px;
  border-left: 4px solid var(--primary);
  background: #f0fdfa;
  padding: 16px;
  border-radius: 0 var(--radius) var(--radius) 0;
  font-weight: 700;
}

.is-debt .interpretation {
  border-left-color: var(--danger);
  background: #fff1f2;
}

.content-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
  margin-top: 28px;
}

.content-grid article {
  padding: 24px;
  min-width: 0;
}

.content-grid p {
  color: var(--muted);
}

code {
  display: block;
  max-width: 100%;
  overflow-x: auto;
  background: #111827;
  color: #f8fafc;
  border-radius: 6px;
  padding: 14px;
  white-space: nowrap;
}

.cta-band {
  margin-top: 28px;
  padding: 28px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 28px;
  background: #fff7ed;
  border-color: rgba(194, 65, 12, 0.28);
}

.cta-band p:not(.eyebrow) {
  color: var(--muted);
  max-width: 720px;
}

.cta-actions {
  display: grid;
  gap: 10px;
  justify-items: end;
}

.primary-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  white-space: nowrap;
}

.text-link {
  color: var(--primary-dark);
  font-size: 0.92rem;
  font-weight: 800;
  text-align: right;
}

.site-footer {
  padding: 34px 0 48px;
  color: var(--muted);
  font-size: 0.9rem;
  text-align: center;
}

.site-footer p {
  margin: 6px 0;
}

@media (max-width: 920px) {
  .hero,
  .calculator-grid,
  .content-grid,
  .cta-band {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
  }

  .cta-band {
    align-items: stretch;
  }

  .cta-actions {
    justify-items: start;
  }
}

@media (max-width: 640px) {
  .topbar {
    align-items: flex-start;
    flex-direction: column;
    padding: 18px 0;
  }

  .topnav {
    width: 100%;
    justify-content: space-between;
  }

  .hero {
    padding-top: 20px;
    gap: 24px;
  }

  .calculator-shell,
  .input-panel,
  .result-panel,
  .content-grid article,
  .cta-band {
    padding: 18px;
  }

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

  .chart {
    height: 200px;
  }

  .mode-switch {
    width: 100%;
  }

  .mode-button {
    min-width: 0;
  }
}