:root {
  --ink: #14231d;
  --muted: #5c6d65;
  --paper: #f7f4ed;
  --card: #ffffff;
  --line: #d9ded8;
  --accent: #0b6b4f;
  --accent-dark: #084d3a;
  --accent-soft: #dff4e9;
  --night: #10261e;
  --warning: #8a5a13;
  --warning-soft: #fff4dc;
  --shadow: 0 16px 44px rgba(20, 35, 29, 0.08);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
  line-height: 1.65;
}

a {
  color: var(--accent);
  text-underline-offset: 0.15em;
}

a:hover {
  color: var(--accent-dark);
}

a:focus-visible,
button:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 3px;
}

.skip-link {
  position: absolute;
  left: 1rem;
  top: -5rem;
  z-index: 20;
  background: var(--night);
  color: #fff;
  padding: 0.75rem 1rem;
  border-radius: 0.45rem;
  text-decoration: none;
}

.skip-link:focus {
  top: 1rem;
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  max-width: 1180px;
  margin: auto;
  padding: 1rem 1.5rem;
  border-bottom: 1px solid var(--line);
}

.brand {
  color: var(--ink);
  font-weight: 850;
  font-size: 1.08rem;
  text-decoration: none;
  white-space: nowrap;
}

.brand span {
  color: var(--accent);
}

nav {
  display: flex;
  gap: 1.1rem;
  flex-wrap: wrap;
  align-items: center;
}

nav a,
footer a,
.small a {
  color: var(--accent);
  font-weight: 680;
}

nav a[aria-current="page"] {
  color: var(--ink);
  text-decoration-thickness: 0.16em;
}

main {
  max-width: 1120px;
  margin: auto;
  padding: 0 1.5rem;
}

.hero {
  padding: 6rem 0 4rem;
  max-width: 900px;
}

.hero.compact {
  padding-bottom: 2.5rem;
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.13em;
  font-size: 0.76rem;
  font-weight: 820;
  color: var(--accent);
}

h1 {
  font-size: clamp(2.7rem, 7vw, 5.4rem);
  line-height: 0.98;
  letter-spacing: -0.055em;
  margin: 0.4rem 0 1.3rem;
}

h2 {
  font-size: clamp(1.7rem, 4vw, 2.7rem);
  line-height: 1.12;
  letter-spacing: -0.03em;
  margin-top: 0;
}

h3 {
  line-height: 1.25;
}

.lede {
  font-size: 1.25rem;
  color: var(--muted);
  max-width: 800px;
}

.actions {
  display: flex;
  gap: 0.8rem;
  flex-wrap: wrap;
  margin-top: 2rem;
}

.button,
.result-cta {
  display: inline-block;
  background: var(--accent);
  color: #fff;
  text-decoration: none;
  padding: 0.82rem 1.1rem;
  border-radius: 0.55rem;
  font-weight: 800;
  min-height: 46px;
}

.button:hover,
.result-cta:hover {
  background: var(--accent-dark);
  color: #fff;
}

.button.secondary {
  background: transparent;
  color: var(--accent);
  border: 1px solid var(--accent);
}

.button.secondary:hover {
  background: var(--accent-soft);
}

.stats,
.metric-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
  margin-bottom: 2rem;
}

.stats div,
.metric-card,
.download,
.callout,
.fit-result,
.choice-group,
.card,
.flow-step {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 0.8rem;
  padding: 1.2rem;
}

.stats strong,
.metric-card strong {
  display: block;
  font-size: 2rem;
  line-height: 1.1;
}

.stats span,
.metric-card span,
.download span,
.small,
.meta-note {
  color: var(--muted);
  font-size: 0.9rem;
}

.section {
  padding: 4rem 0;
  border-top: 1px solid var(--line);
}

.section > p,
.content-narrow {
  max-width: 800px;
}

.download-grid,
.link-grid,
.card-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  margin: 1.5rem 0;
}

.download,
.link-grid a,
.card {
  color: var(--ink);
  text-decoration: none;
}

.download strong {
  display: block;
  color: var(--accent);
  font-size: 1.25rem;
}

.link-grid a {
  background: var(--card);
  border: 1px solid var(--line);
  padding: 1rem;
  border-radius: 0.65rem;
  font-weight: 720;
}

.download:hover,
.link-grid a:hover,
.card:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow);
}

.split {
  display: grid;
  grid-template-columns: 1.35fr 0.85fr;
  gap: 2rem;
}

.callout {
  background: var(--night);
  color: #fff;
}

.callout a {
  color: #b9f2d8;
}

.callout h3 {
  font-size: 1.35rem;
}

.notice {
  border-left: 4px solid var(--warning);
  background: var(--warning-soft);
  padding: 1rem 1.2rem;
  margin: 1.5rem 0;
}

.flow {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 0.75rem;
  list-style: none;
  padding: 0;
  margin: 2rem 0;
  counter-reset: flow;
}

.flow-step {
  counter-increment: flow;
  position: relative;
}

.flow-step::before {
  content: counter(flow);
  display: inline-grid;
  place-items: center;
  width: 2rem;
  height: 2rem;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent-dark);
  font-weight: 850;
  margin-bottom: 0.7rem;
}

.flow-step strong,
.flow-step span {
  display: block;
}

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

.check-list,
.boundary-list {
  padding-left: 1.25rem;
}

.check-list li,
.boundary-list li {
  margin: 0.55rem 0;
}

.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: 0.75rem;
  background: var(--card);
}

table {
  width: 100%;
  border-collapse: collapse;
  min-width: 720px;
}

th,
td {
  text-align: left;
  vertical-align: top;
  padding: 0.85rem 1rem;
  border-bottom: 1px solid var(--line);
}

th {
  background: var(--accent-soft);
  font-size: 0.9rem;
}

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

code {
  background: #edf0ec;
  border-radius: 0.3rem;
  padding: 0.12rem 0.32rem;
  font-size: 0.92em;
  overflow-wrap: anywhere;
}

.fit-shell {
  display: grid;
  grid-template-columns: 1.25fr 0.75fr;
  gap: 1.25rem;
  padding: 1rem 0 4rem;
}

.choice-group {
  margin-bottom: 1rem;
}

.choice-group legend {
  font-size: 1.05rem;
  font-weight: 800;
  padding: 0 0.2rem;
}

.choice-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.65rem;
  margin-top: 0.8rem;
}

.choice {
  border: 1px solid var(--line);
  background: #fff;
  border-radius: 0.55rem;
  padding: 0.85rem;
  text-align: left;
  cursor: pointer;
  min-height: 70px;
  color: var(--ink);
  font: inherit;
}

.choice strong,
.choice span {
  display: block;
}

.choice span {
  color: var(--muted);
  font-size: 0.84rem;
}

.choice[aria-pressed="true"] {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px var(--accent);
  background: var(--accent-soft);
}

.fit-result {
  position: sticky;
  top: 1rem;
  align-self: start;
}

.fit-result h2 {
  font-size: 1.65rem;
}

.nonfit {
  border-left: 3px solid #c88728;
  padding-left: 1rem;
}

.alternative {
  margin-top: 1.2rem;
  border-top: 1px solid var(--line);
  padding-top: 1rem;
}

.compact-copy {
  max-width: 800px;
}

footer {
  max-width: 1120px;
  margin: 2rem auto 0;
  padding: 2rem 1.5rem 4rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
}

@media (max-width: 900px) {
  .stats,
  .metric-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

@media (max-width: 760px) {
  .site-header {
    align-items: flex-start;
    flex-direction: column;
    gap: 0.55rem;
  }

  nav {
    gap: 0.75rem 1rem;
  }

  .hero {
    padding: 4rem 0 3rem;
  }

  .stats,
  .metric-grid,
  .download-grid,
  .link-grid,
  .card-grid,
  .split,
  .fit-shell,
  .flow {
    grid-template-columns: 1fr;
  }

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

  .fit-result {
    position: static;
  }

  h1 {
    font-size: 3rem;
  }
}