:root {
  --bg: #f7f8f6;
  --surface: #ffffff;
  --surface-2: #eef4f0;
  --ink: #17211b;
  --muted: #5c6961;
  --line: #d9e1db;
  --green: #126b4b;
  --green-dark: #0a4933;
  --blue: #245d8f;
  --amber: #b56b13;
  --red: #a63d32;
  --shadow: 0 12px 32px rgba(23, 33, 27, 0.08);
  --radius: 8px;
  --max: 1180px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 16px;
  line-height: 1.6;
}

.skip-link {
  position: absolute;
  left: 12px;
  top: -48px;
  z-index: 100;
  padding: 10px 14px;
  border-radius: var(--radius);
  background: var(--ink);
  color: #ffffff;
  font-weight: 800;
}

.skip-link:focus {
  top: 12px;
}

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

a:hover {
  color: var(--green-dark);
  text-decoration: underline;
}

img,
svg {
  max-width: 100%;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid var(--line);
  background: rgba(247, 248, 246, 0.94);
  backdrop-filter: blur(12px);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--max);
  min-height: 68px;
  margin: 0 auto;
  padding: 0 24px;
  gap: 24px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  font-weight: 800;
  letter-spacing: 0;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: 7px;
  background: var(--green);
  color: #ffffff;
  font-weight: 900;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 18px;
  font-size: 0.94rem;
  font-weight: 650;
}

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

.nav-links .nav-cta {
  color: #ffffff;
}

.nav-links .nav-cta:hover {
  color: #ffffff;
}

.nav-cta,
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 10px 16px;
  border-radius: var(--radius);
  border: 1px solid transparent;
  background: var(--green);
  color: #ffffff;
  font-weight: 750;
  line-height: 1.2;
  text-decoration: none;
  cursor: pointer;
}

.nav-cta:hover,
.button:hover {
  background: var(--green-dark);
  color: #ffffff;
  text-decoration: none;
}

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

.button.secondary:hover {
  border-color: var(--green);
  color: var(--green-dark);
  background: var(--surface-2);
}

.hero {
  max-width: var(--max);
  margin: 0 auto;
  padding: 76px 24px 54px;
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(320px, 0.95fr);
  align-items: center;
  gap: 56px;
}

.hero h1 {
  margin: 0;
  max-width: 760px;
  font-size: clamp(2.45rem, 5vw, 5.3rem);
  line-height: 0.96;
  letter-spacing: 0;
}

.hero p {
  max-width: 680px;
  margin: 24px 0 0;
  color: var(--muted);
  font-size: 1.18rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

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

.hero-panel-header {
  padding: 18px 20px;
  border-bottom: 1px solid var(--line);
  background: var(--surface-2);
  font-weight: 800;
}

.hero-panel-body {
  padding: 20px;
}

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

.metric {
  min-height: 100px;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #ffffff;
}

.metric strong {
  display: block;
  color: var(--green-dark);
  font-size: 1.55rem;
  line-height: 1.1;
}

.metric span {
  display: block;
  margin-top: 6px;
  color: var(--muted);
  font-size: 0.9rem;
}

.section,
.page {
  max-width: var(--max);
  margin: 0 auto;
  padding: 48px 24px;
}

.band {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: var(--surface);
}

.section-header {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 24px;
}

.section-header h2,
.page h1,
.page h2 {
  margin: 0;
  line-height: 1.08;
  letter-spacing: 0;
}

.section-header h2 {
  font-size: clamp(1.8rem, 3vw, 3rem);
}

.page h1 {
  max-width: 920px;
  font-size: clamp(2.1rem, 4vw, 4.2rem);
}

.page h2 {
  margin-top: 44px;
  font-size: clamp(1.55rem, 2.4vw, 2.4rem);
}

.lede {
  max-width: 780px;
  margin: 18px 0 0;
  color: var(--muted);
  font-size: 1.12rem;
}

.updated {
  margin: 14px 0 0;
  color: var(--muted);
  font-size: 0.94rem;
}

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

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

.card,
.notice,
.calculator,
.result-box {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}

.card {
  display: flex;
  flex-direction: column;
  gap: 12px;
  min-height: 168px;
  padding: 20px;
}

.card h3 {
  margin: 0;
  font-size: 1.15rem;
  line-height: 1.25;
}

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

.card-meta {
  margin-top: auto;
  color: var(--blue);
  font-size: 0.92rem;
  font-weight: 750;
}

.notice {
  margin: 24px 0;
  padding: 18px 20px;
  border-left: 4px solid var(--amber);
  color: #513414;
  background: #fff7e8;
}

.notice strong {
  color: #3b260e;
}

.table-wrap {
  overflow-x: auto;
  margin-top: 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}

table {
  width: 100%;
  border-collapse: collapse;
  min-width: 680px;
}

th,
td {
  padding: 14px 16px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

th {
  background: var(--surface-2);
  color: var(--ink);
  font-size: 0.88rem;
  text-transform: uppercase;
}

tr:last-child td {
  border-bottom: 0;
}

.list-check {
  padding-left: 0;
  list-style: none;
}

.list-check li {
  position: relative;
  margin: 10px 0;
  padding-left: 28px;
}

.list-check li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.5em;
  width: 12px;
  height: 12px;
  border-radius: 3px;
  background: var(--green);
}

.calculator {
  margin-top: 28px;
  padding: 24px;
}

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

.field {
  display: grid;
  gap: 7px;
}

label {
  color: var(--ink);
  font-size: 0.92rem;
  font-weight: 750;
}

input,
select {
  width: 100%;
  min-height: 44px;
  padding: 10px 12px;
  border: 1px solid #cbd6cf;
  border-radius: var(--radius);
  background: #ffffff;
  color: var(--ink);
  font: inherit;
}

input:focus,
select:focus {
  outline: 3px solid rgba(18, 107, 75, 0.18);
  border-color: var(--green);
}

.inline-field {
  display: flex;
  align-items: center;
  gap: 10px;
  min-height: 44px;
}

.inline-field input {
  width: auto;
}

.calc-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  margin-top: 18px;
}

.result-box {
  display: grid;
  gap: 12px;
  margin-top: 20px;
  padding: 18px;
  background: #f9fbfa;
}

.result-main {
  font-size: clamp(1.55rem, 3vw, 2.45rem);
  font-weight: 850;
  line-height: 1.1;
  color: var(--green-dark);
}

.result-list {
  margin: 0;
  padding-left: 20px;
}

.source-list {
  display: grid;
  gap: 8px;
  padding-left: 18px;
}

.faq-list {
  display: grid;
  gap: 14px;
  margin-top: 20px;
}

.faq-item {
  padding: 18px 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}

.faq-item h3 {
  margin: 0 0 8px;
  font-size: 1.04rem;
}

.faq-item p {
  margin: 0;
  color: var(--muted);
}

.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 22px;
  color: var(--muted);
  font-size: 0.92rem;
}

.breadcrumbs a {
  color: var(--muted);
}

.state-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 18px;
}

.state-strip a {
  display: inline-flex;
  min-height: 34px;
  align-items: center;
  padding: 6px 10px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--ink);
  font-weight: 700;
  font-size: 0.9rem;
}

.cta-band {
  margin-top: 44px;
  padding: 26px;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: #eaf3ef;
}

.cta-band h2 {
  margin-top: 0;
}

.site-footer {
  margin-top: 48px;
  border-top: 1px solid var(--line);
  background: var(--ink);
  color: #dce8df;
}

.footer-inner {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 24px;
  max-width: var(--max);
  margin: 0 auto;
  padding: 34px 24px;
}

.site-footer a {
  color: #ffffff;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 16px;
}

@media (max-width: 860px) {
  .nav {
    align-items: flex-start;
    flex-direction: column;
    padding-top: 14px;
    padding-bottom: 14px;
  }

  .nav-links {
    width: 100%;
    flex-wrap: wrap;
    overflow-x: visible;
    padding-bottom: 0;
  }

  .hero,
  .grid,
  .grid.two,
  .footer-inner {
    grid-template-columns: 1fr;
  }

  .hero {
    padding-top: 46px;
    gap: 32px;
  }

  .section-header {
    align-items: flex-start;
    flex-direction: column;
  }
}

@media (max-width: 620px) {
  .hero h1,
  .page h1 {
    font-size: 2.3rem;
  }

  .mini-grid,
  .calc-grid {
    grid-template-columns: 1fr;
  }

  .hero,
  .section,
  .page {
    padding-left: 18px;
    padding-right: 18px;
  }

  .calculator {
    padding: 18px;
  }

  .footer-links {
    justify-content: flex-start;
  }
}