:root {
  --bg: #f6f7f4;
  --ink: #17201b;
  --muted: #5d6a61;
  --panel: #ffffff;
  --line: #dfe5dc;
  --green: #16734a;
}

* {
  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;
  line-height: 1.5;
}

a {
  color: inherit;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 14px clamp(18px, 4vw, 52px);
  border-bottom: 1px solid var(--line);
  background: rgba(246, 247, 244, 0.92);
  backdrop-filter: blur(12px);
}

.brand,
.nav {
  display: inline-flex;
  align-items: center;
  gap: 12px;
}

.brand {
  font-weight: 800;
  text-decoration: none;
}

.brand-mark {
  display: inline-grid;
  width: 34px;
  height: 34px;
  place-items: center;
  border-radius: 8px;
  background: var(--ink);
  color: #fff;
  font-size: 0.78rem;
  letter-spacing: 0;
}

.nav a {
  color: var(--muted);
  font-weight: 650;
  text-decoration: none;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(280px, 0.6fr);
  gap: clamp(26px, 5vw, 64px);
  align-items: center;
  min-height: calc(100vh - 64px);
  padding: clamp(42px, 7vw, 88px) clamp(18px, 6vw, 84px);
}

.hero-copy {
  max-width: 780px;
}

.eyebrow,
.tag {
  margin: 0 0 10px;
  color: var(--green);
  font-size: 0.78rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

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

h1 {
  margin-bottom: 18px;
  font-size: clamp(2.4rem, 6vw, 5.6rem);
  line-height: 0.98;
  letter-spacing: 0;
}

h2 {
  margin-bottom: 10px;
  font-size: clamp(1.7rem, 3vw, 2.7rem);
  line-height: 1.05;
  letter-spacing: 0;
}

h3 {
  margin-bottom: 8px;
  font-size: 1.2rem;
}

.lede {
  max-width: 650px;
  color: var(--muted);
  font-size: clamp(1.05rem, 1.6vw, 1.3rem);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.button,
.tool-card a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 18px;
  border-radius: 8px;
  font-weight: 800;
  text-decoration: none;
}

.button.primary,
.tool-card a {
  background: var(--green);
  color: #fff;
}

.button.ghost {
  border: 1px solid var(--line);
  background: #fff;
}

.snapshot,
.tool-card,
.calculator,
.disclosure {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
}

.snapshot {
  overflow: hidden;
  padding: 0 0 24px;
}

.snapshot ul,
.steps {
  padding-left: 22px;
  color: var(--muted);
}

.snapshot li,
.steps li {
  margin: 10px 0;
}

.snapshot h2,
.snapshot ul {
  margin-inline: 24px;
}

.snapshot-image {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  border-bottom: 1px solid var(--line);
}

.band,
.tools-section,
.disclosure {
  padding: clamp(38px, 6vw, 78px) clamp(18px, 6vw, 84px);
}

.band {
  background: #fff;
  border-block: 1px solid var(--line);
}

.section-head {
  max-width: 760px;
  margin-bottom: 28px;
}

.section-head p:not(.eyebrow) {
  color: var(--muted);
}

.calculator {
  display: grid;
  grid-template-columns: repeat(5, minmax(150px, 1fr));
  gap: 16px;
  padding: 18px;
}

label {
  display: grid;
  gap: 8px;
  color: var(--muted);
  font-weight: 750;
}

input {
  width: 100%;
  min-height: 44px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 0 12px;
  color: var(--ink);
  font: inherit;
}

.result {
  display: grid;
  gap: 3px;
  align-content: center;
  padding: 18px;
  border-radius: 8px;
  background: #eef8f1;
}

.result span,
.result small {
  color: var(--muted);
  font-weight: 750;
}

.result strong {
  font-size: clamp(1.5rem, 3vw, 2.4rem);
  line-height: 1;
}

.tool-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.resource-grid,
.article-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.resource-grid a,
.article-card {
  min-height: 120px;
  display: grid;
  align-content: center;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  color: var(--ink);
  padding: 20px;
  text-decoration: none;
  font-weight: 900;
}

.article-hero {
  background: var(--ink);
  color: #fff;
  padding: clamp(48px, 8vw, 96px) clamp(18px, 6vw, 84px);
}

.article-hero h1 {
  max-width: 900px;
  margin: 0;
  font-size: clamp(2.8rem, 7vw, 5.8rem);
  line-height: 1.02;
  letter-spacing: 0;
}

.article-hero p {
  max-width: 720px;
  color: rgba(255, 255, 255, 0.76);
  font-size: 1.12rem;
  line-height: 1.65;
}

.article-page {
  display: grid;
  gap: 28px;
  padding: clamp(48px, 7vw, 84px) clamp(18px, 6vw, 84px);
}

.article-page h2 {
  margin: 0 0 10px;
  font-size: clamp(1.8rem, 4vw, 3rem);
}

.article-page p,
.article-page li {
  color: var(--muted);
  line-height: 1.7;
}

.article-panel {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  padding: 22px;
}

.tool-card {
  display: grid;
  gap: 18px;
  align-content: space-between;
  padding: 20px;
}

.tool-card p:not(.tag),
.tool-card dd {
  color: var(--muted);
}

dl,
dd {
  margin: 0;
}

dt {
  color: var(--ink);
  font-weight: 800;
}

dl div {
  padding-top: 10px;
  border-top: 1px solid var(--line);
}

.disclosure {
  margin: clamp(24px, 5vw, 64px) clamp(18px, 6vw, 84px);
}

.disclosure p {
  max-width: 900px;
  color: var(--muted);
}

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

@media (max-width: 680px) {
  .topbar {
    align-items: flex-start;
    flex-direction: column;
  }

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

  .hero,
  .calculator,
  .tool-grid,
  .resource-grid,
  .article-grid {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
  }
}