:root {
  --ink: #17201b;
  --muted: #5d6861;
  --forest: #245546;
  --forest-dark: #173b30;
  --mint: #e7f3ec;
  --cream: #f8f3ea;
  --paper: #fffdf8;
  --clay: #b66b4d;
  --sky: #d8e8f2;
  --line: #d8d7ce;
  --warning: #7c4a2f;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--cream);
  color: var(--ink);
  font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.55;
}

a {
  color: var(--forest);
  text-decoration: underline;
  text-underline-offset: 0.16em;
}

a:hover {
  text-decoration: underline;
}

.shell {
  width: min(1160px, calc(100% - 32px));
  margin: 0 auto;
}

.site-header {
  border-bottom: 1px solid var(--line);
  background: rgba(248, 243, 234, 0.94);
}

.nav {
  min-height: 68px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 22px;
}

.brand {
  color: var(--ink);
  font-weight: 850;
  font-size: 20px;
  text-decoration: none;
}

.nav-links {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  align-items: center;
  font-size: 14px;
}

.hero {
  padding: 54px 0 30px;
}

.hero-grid,
.tool-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(360px, 1.08fr);
  gap: 34px;
  align-items: start;
}

.eyebrow {
  color: var(--clay);
  font-weight: 800;
  margin-bottom: 12px;
}

h1,
h2,
h3 {
  letter-spacing: 0;
  line-height: 1.08;
}

h1 {
  max-width: 790px;
  margin: 0 0 18px;
  font-size: clamp(36px, 6vw, 66px);
  line-height: 0.96;
}

h2 {
  margin: 0 0 14px;
  font-size: clamp(26px, 4vw, 38px);
}

h3 {
  margin: 0 0 8px;
  font-size: 20px;
}

p {
  margin: 0 0 16px;
}

.lead {
  max-width: 650px;
  color: var(--muted);
  font-size: 19px;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 24px;
}

.button {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--forest);
  border-radius: 6px;
  background: var(--forest);
  color: #fff;
  font-weight: 800;
  padding: 0 16px;
  text-decoration: none;
}

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

.button.secondary {
  background: transparent;
  color: var(--forest);
}

.panel,
.card,
.note,
.legal-box {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 6px;
}

.panel {
  padding: 22px;
  box-shadow: 0 18px 50px rgba(36, 85, 70, 0.08);
}

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

label {
  display: grid;
  gap: 6px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 760;
}

input {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 11px 12px;
  background: #fff;
  color: var(--ink);
  font: inherit;
}

input:focus {
  outline: 3px solid rgba(36, 85, 70, 0.18);
  border-color: var(--forest);
}

.result {
  margin-top: 16px;
  padding: 18px;
  background: var(--mint);
  border: 1px solid #c4ddcf;
  border-radius: 6px;
}

.result .metric {
  display: block;
  color: var(--forest);
  font-size: clamp(30px, 8vw, 46px);
  font-weight: 880;
  line-height: 1.05;
  overflow-wrap: anywhere;
}

.result-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  margin-top: 14px;
}

.mini-result {
  padding: 12px;
  background: rgba(255, 255, 255, 0.58);
  border: 1px solid rgba(36, 85, 70, 0.16);
  border-radius: 6px;
}

.mini-result span {
  display: block;
  color: var(--muted);
  font-size: 12px;
}

.mini-result strong {
  display: block;
  margin-top: 3px;
  font-size: 18px;
}

.section {
  padding: 34px 0;
}

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

.card {
  min-height: 188px;
  padding: 20px;
}

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

.note {
  padding: 18px;
  background: var(--sky);
  border-color: #bdd3df;
}

.warning {
  color: var(--warning);
  font-size: 13px;
}

.content {
  max-width: 840px;
  padding: 44px 0;
}

.content h1 {
  font-size: clamp(34px, 5vw, 54px);
}

.content h2 {
  margin-top: 30px;
}

.legal-box {
  margin: 20px 0;
  padding: 20px;
}

.site-footer {
  margin-top: 40px;
  border-top: 1px solid var(--line);
  padding: 26px 0 40px;
  color: var(--muted);
  font-size: 14px;
}

.footer-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 22px;
}

@media (max-width: 860px) {
  .hero-grid,
  .tool-grid,
  .cards,
  .footer-grid {
    grid-template-columns: 1fr;
  }

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

  .nav {
    align-items: flex-start;
    flex-direction: column;
    padding: 16px 0;
  }
}

@media (max-width: 520px) {
  .calculator-grid {
    grid-template-columns: 1fr;
  }

  h1 {
    font-size: 40px;
  }
}