:root {
  --paper: #f4f2ed;
  --paper-deep: #e6e3dc;
  --white: #fbfaf6;
  --ink: #141412;
  --muted: #66645d;
  --blue: #3a5478;
  --blue-dark: #2c425f;
  --acid: #d4c56a;
  --line: rgba(20, 20, 18, 0.18);
  --display: "Unbounded", "Arial Black", sans-serif;
  --body: "Manrope", Arial, sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  overflow-x: hidden;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--body);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
  text-decoration: none;
}

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

h1,
h2,
h3 {
  font-family: var(--display);
  font-weight: 600;
  letter-spacing: -0.05em;
  text-transform: uppercase;
}

h1 em,
h2 em {
  color: var(--blue);
  font-style: normal;
}

.skip-link {
  position: fixed;
  z-index: 100;
  top: 12px;
  left: 12px;
  padding: 10px 16px;
  background: var(--ink);
  color: var(--white);
  transform: translateY(-180%);
}

.skip-link:focus {
  transform: translateY(0);
}

:focus-visible {
  outline: 3px solid var(--acid);
  outline-offset: 4px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  line-height: 1;
}

.brand-mark {
  display: grid;
  width: 37px;
  height: 37px;
  place-items: center;
  border-radius: 50%;
  background: var(--blue);
  color: var(--acid);
  font: 600 18px/1 var(--display);
}

.brand strong,
.brand small {
  display: block;
}

.brand strong {
  font: 600 clamp(14px, 1.35vw, 20px) / 1.05 var(--display);
  letter-spacing: -0.05em;
}

.brand small {
  margin-top: 5px;
  color: var(--muted);
  font-size: 9px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  min-height: calc(100svh - 124px);
}

.hero-copy {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: clamp(48px, 7vw, 100px) clamp(24px, 5vw, 86px);
}

.eyebrow {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 40px;
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.pulse-dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--blue);
}

h1 {
  margin-bottom: 28px;
  font-size: clamp(36px, 4.6vw, 72px);
  line-height: 0.96;
}

.hero-lead {
  max-width: 640px;
  margin-bottom: 36px;
  color: #403c37;
  font-size: clamp(16px, 1.2vw, 19px);
  line-height: 1.75;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 18px;
  min-height: 54px;
  padding: 0 22px;
  border: 0;
  border-radius: 2px;
  font: 700 11px / 1 var(--body);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  cursor: pointer;
}

.button-primary {
  background: var(--blue);
  color: var(--white);
}

.button-ghost {
  background: transparent;
  color: var(--ink);
  box-shadow: inset 0 0 0 1px var(--ink);
}

.hero-aside {
  position: relative;
  min-height: 420px;
  background:
    linear-gradient(160deg, rgba(58, 84, 120, 0.16), transparent 55%),
    var(--paper-deep);
}

.hero-card {
  position: absolute;
  right: 8%;
  bottom: 10%;
  max-width: 340px;
  padding: 22px 24px;
  background: var(--white);
}

.hero-card span {
  display: inline-block;
  margin-bottom: 10px;
  padding: 4px 8px;
  background: var(--acid);
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.section {
  padding: clamp(64px, 8vw, 120px) clamp(24px, 6vw, 94px);
}

.section-index {
  margin-bottom: 28px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.kicker {
  margin-bottom: 16px;
  color: var(--blue);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

.calc-toolbar {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 16px;
  margin: 36px 0 20px;
}

.tabs,
.units {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.tabs button,
.units button {
  min-height: 44px;
  padding: 0 16px;
  border: 1px solid var(--ink);
  border-radius: 99px;
  background: transparent;
  font: 700 11px / 1 var(--body);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  cursor: pointer;
}

.tabs button[aria-selected="true"],
.units button[aria-pressed="true"] {
  background: var(--blue);
  color: var(--white);
  border-color: var(--blue);
}

.calc-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(280px, 0.85fr);
  gap: 28px;
  align-items: start;
}

.calc-panel h3 {
  margin-bottom: 8px;
  font-size: 22px;
}

.calc-panel > p {
  max-width: 640px;
  color: var(--muted);
  font-size: 15px;
}

.fields {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  margin: 24px 0;
}

.field,
.field-full {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.field-full {
  grid-column: 1 / -1;
}

label,
.legend {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.04em;
}

input,
select {
  min-height: 52px;
  padding: 0 14px;
  border: 1px solid var(--line);
  background: var(--white);
  color: var(--ink);
  font: 500 16px / 1.2 var(--body);
}

.sex-row {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

.sex-row label {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 600;
  letter-spacing: 0;
  text-transform: none;
}

.flags {
  display: grid;
  gap: 10px;
  margin: 8px 0 20px;
  color: var(--muted);
  font-size: 14px;
}

.flags label {
  display: flex;
  gap: 8px;
  align-items: flex-start;
  font-weight: 500;
  letter-spacing: 0;
  text-transform: none;
}

.result-box {
  position: sticky;
  top: 16px;
  min-height: 280px;
  padding: 28px;
  background: var(--blue);
  color: var(--white);
}

.result-kicker,
.result-tag {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.result-number {
  margin: 8px 0 12px;
  font: 600 clamp(42px, 5vw, 72px) / 0.95 var(--display);
}

.result-placeholder,
.result-box p,
.calc-error {
  color: rgba(255, 255, 255, 0.86);
  font-size: 15px;
}

.calc-error {
  color: #ffe08a;
}

.result-foot {
  margin-top: 16px;
  color: rgba(255, 255, 255, 0.7);
  font-size: 13px;
}

.not-this {
  margin-top: 36px;
  padding: 28px;
  background: var(--paper-deep);
}

.not-this h3 {
  margin-bottom: 12px;
  font-size: 20px;
}

.not-this ul {
  margin: 0;
  padding-left: 18px;
  color: var(--muted);
}

.next-grid,
.dpp,
.cta {
  display: grid;
  gap: 16px;
}

.next-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin-top: 28px;
}

.next-grid article {
  padding: 24px;
  border: 1px solid var(--ink);
}

.next-grid h3 {
  font-size: 20px;
}

.next-grid a {
  color: var(--blue);
  font-weight: 700;
}

.dpp {
  grid-template-columns: 0.4fr 1fr;
  align-items: center;
  padding: 36px;
  background: var(--acid);
}

.dpp strong {
  font: 600 42px / 1 var(--display);
}

.cta {
  justify-items: start;
}

.cta .button {
  opacity: 0.72;
  pointer-events: none;
}

.disclaimer {
  max-width: 780px;
  color: var(--muted);
  font-size: 14px;
}

.sources {
  display: grid;
  grid-template-columns: 0.62fr 1.38fr;
  gap: 8vw;
  padding: clamp(75px, 9vw, 135px) clamp(24px, 6vw, 94px);
  background: var(--blue);
  color: white;
}

.sources h2 {
  overflow-wrap: normal;
  font-size: clamp(36px, 3.8vw, 64px);
  white-space: nowrap;
}

.sources-heading > p:last-child {
  margin-top: 24px;
  color: rgba(255, 255, 255, 0.58);
  font-size: 11px;
}

.sources ol {
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: sources;
}

.sources li {
  counter-increment: sources;
}

.sources a {
  display: grid;
  grid-template-columns: 40px 1fr;
  gap: 14px;
  padding: 20px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.3);
  color: rgba(255, 255, 255, 0.78);
  font-size: 12px;
}

.sources a::before {
  content: counter(sources, decimal-leading-zero);
  color: var(--acid);
  font-weight: 700;
}

footer {
  display: grid;
  grid-template-columns: 1fr 1fr auto;
  gap: 24px;
  padding: 28px clamp(24px, 6vw, 94px);
  background: var(--ink);
  color: rgba(255, 255, 255, 0.7);
}

.brand-footer .brand-mark {
  color: var(--acid);
}

.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 700ms ease, transform 700ms ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: none;
}

@media (max-width: 980px) {
  .hero,
  .calc-layout,
  .next-grid,
  .dpp,
  .sources,
  footer {
    grid-template-columns: 1fr;
  }

  .hero-aside {
    min-height: 280px;
  }

  .hero-card {
    position: relative;
    right: auto;
    bottom: auto;
    margin: 0 24px 32px;
  }

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

  .result-box {
    position: static;
  }

  .sources h2 {
    white-space: normal;
  }
}