:root {
  --bg: #fbfaf8;
  --surface: #f0eee9;
  --text: #14181d;
  --muted: #4f5a66;
  --accent: #12503f;
  --accent-contrast: #ffffff;

  --accent-quiet: #e3ece7;
  --line: #ddd8cf;
  --line-strong: #c6bfb2;

  --font-head: "Iowan Old Style", Georgia, "Times New Roman", Times, serif;
  --font-body: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    "Helvetica Neue", Arial, sans-serif;

  --step--1: 0.8125rem;
  --step-0: 1.0625rem;
  --step-1: 1.1875rem;
  --step-2: clamp(1.3rem, 1.1rem + 0.8vw, 1.55rem);
  --step-3: clamp(1.55rem, 1.25rem + 1.4vw, 2.05rem);
  --step-4: clamp(1.95rem, 1.5rem + 2.3vw, 2.9rem);

  --container: 68rem;
  --gutter: clamp(1.15rem, 4vw, 2.5rem);
  --section-y: clamp(3.25rem, 7vw, 5.75rem);
  --radius: 3px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #10151a;
    --surface: #182027;
    --text: #edf1f4;
    --muted: #a7b3bf;
    --accent: #5cc3a1;
    --accent-contrast: #0a1712;

    --accent-quiet: #172a25;
    --line: #2a343d;
    --line-strong: #3d4a55;
  }
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background-color: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: var(--step-0);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-underline-offset: 0.18em;
}

h1,
h2,
h3,
h4 {
  font-family: var(--font-head);
  font-weight: 600;
  line-height: 1.14;
  letter-spacing: -0.012em;
  margin: 0 0 0.6em;
  text-wrap: balance;
}

h1 {
  font-size: var(--step-4);
  letter-spacing: -0.022em;
}

h2 {
  font-size: var(--step-3);
}

h3 {
  font-size: var(--step-2);
  line-height: 1.22;
}

h4 {
  font-size: var(--step-1);
}

p,
ul,
ol,
dl,
figure,
table {
  margin: 0 0 1.15rem;
}

p:last-child,
ul:last-child,
ol:last-child {
  margin-bottom: 0;
}

main p,
main li {
  max-width: 64ch;
}

a {
  color: var(--accent);
  text-decoration-thickness: 1px;
}

a:hover {
  text-decoration-thickness: 2px;
}

strong {
  font-weight: 650;
}

em {
  font-style: italic;
}

small {
  font-size: var(--step--1);
}

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

hr {
  border: 0;
  border-top: 1px solid var(--line);
  margin: 2.5rem 0;
}

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 2px;
}

::selection {
  background: var(--accent);
  color: var(--accent-contrast);
}

/* ---------- layout ---------- */

.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

main > section + section {
  border-top: 1px solid var(--line);
}

.section {
  padding-block: var(--section-y);
}

.section-alt {
  background-color: var(--surface);
  border-top: 1px solid var(--line);
}

.section > .container > h2,
.section-alt > .container > h2 {
  max-width: 36ch;
}

.section > .container > h2 + p,
.section-alt > .container > h2 + p {
  font-size: var(--step-1);
  color: var(--muted);
  max-width: 58ch;
}

/* ---------- header ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background-color: color-mix(in srgb, var(--bg) 92%, transparent);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.35rem 1.5rem;
  padding-block: 0.9rem;
}

.brand {
  font-family: var(--font-head);
  font-size: 1.28rem;
  font-weight: 600;
  letter-spacing: -0.015em;
  color: var(--text);
  text-decoration: none;
  white-space: nowrap;
}

.brand::before {
  content: "";
  display: inline-block;
  width: 0.5rem;
  height: 0.5rem;
  margin-right: 0.55rem;
  background: var(--accent);
  vertical-align: 0.06em;
}

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

.site-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.15rem 1.35rem;
  margin-left: auto;
}

.site-nav a {
  display: inline-block;
  padding: 0.3rem 0;
  font-size: var(--step--1);
  letter-spacing: 0.09em;
  text-transform: uppercase;
  font-weight: 600;
  color: var(--muted);
  text-decoration: none;
  border-bottom: 2px solid transparent;
}

.site-nav a:hover {
  color: var(--text);
  border-bottom-color: var(--line-strong);
}

.site-nav a.is-current {
  color: var(--text);
  border-bottom-color: var(--accent);
}

/* ---------- hero ---------- */

.hero {
  padding-block: clamp(3rem, 8vw, 6.5rem) clamp(2.75rem, 6vw, 5rem);
  background-image: linear-gradient(
    to bottom,
    color-mix(in srgb, var(--surface) 55%, var(--bg)),
    var(--bg)
  );
}

.hero .container > * {
  max-width: 46rem;
}

.hero h1 {
  margin-bottom: 1rem;
}

.hero p {
  font-size: clamp(1.12rem, 1rem + 0.5vw, 1.35rem);
  line-height: 1.5;
  color: var(--muted);
  max-width: 34rem;
}

.hero p strong {
  color: var(--text);
}

.hero .button {
  margin-top: 1.9rem;
  margin-right: 0.65rem;
}

.hero .facts {
  margin-top: clamp(2.5rem, 6vw, 3.75rem);
  max-width: none;
}

.hero svg {
  display: block;
  margin-top: 2.5rem;
  color: var(--accent);
}

/* ---------- buttons ---------- */

.button {
  display: inline-block;
  padding: 0.72rem 1.4rem;
  border: 1px solid transparent;
  border-radius: var(--radius);
  font-size: var(--step-0);
  font-weight: 600;
  line-height: 1.3;
  text-decoration: none;
  cursor: pointer;
  transition: background-color 140ms ease, color 140ms ease,
    border-color 140ms ease, transform 140ms ease;
}

.button-primary {
  background-color: var(--accent);
  border-color: var(--accent);
  color: var(--accent-contrast);
}

.button-primary:hover {
  background-color: color-mix(in srgb, var(--accent) 84%, var(--text));
  border-color: color-mix(in srgb, var(--accent) 84%, var(--text));
  transform: translateY(-1px);
}

.button-secondary {
  background-color: transparent;
  border-color: var(--line-strong);
  color: var(--text);
}

.button-secondary:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-1px);
}

.button:active {
  transform: none;
}

/* ---------- card grid ---------- */

.card-grid {
  list-style: none;
  margin: 2.25rem 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background-color: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  grid-template-columns: repeat(auto-fit, minmax(16rem, 1fr));
}

.card {
  background-color: var(--bg);
  padding: clamp(1.4rem, 3vw, 2rem);
  display: flex;
  flex-direction: column;
}

.section-alt .card {
  background-color: var(--surface);
}

.card h3 {
  margin-bottom: 0.5rem;
}

.card h3::after {
  content: "";
  display: block;
  width: 1.75rem;
  height: 2px;
  margin-top: 0.75rem;
  background-color: var(--accent);
}

.card p {
  color: var(--muted);
  margin-bottom: 0.8rem;
  max-width: 42ch;
}

.card p:last-child {
  margin-bottom: 0;
}

.card a {
  font-weight: 600;
}

/* ---------- facts ---------- */

.facts {
  display: grid;
  gap: 1px;
  background-color: var(--line);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  margin: 2.25rem 0 0;
  grid-template-columns: repeat(auto-fit, minmax(11rem, 1fr));
}

.fact {
  background-color: var(--bg);
  padding: 1.2rem clamp(1rem, 2.5vw, 1.5rem) 1.35rem;
}

.section-alt .fact,
.hero .fact {
  background-color: transparent;
}

.fact dt {
  font-size: var(--step--1);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-weight: 600;
  color: var(--muted);
  margin-bottom: 0.45rem;
}

.fact dd {
  margin: 0;
  font-family: var(--font-head);
  font-size: clamp(1.45rem, 1.2rem + 1vw, 1.95rem);
  line-height: 1.15;
  letter-spacing: -0.02em;
  font-variant-numeric: tabular-nums;
}

.fact dd small,
.fact dd span {
  display: block;
  font-family: var(--font-body);
  font-size: var(--step--1);
  letter-spacing: 0;
  color: var(--muted);
  margin-top: 0.4rem;
  line-height: 1.5;
}

/* ---------- quote ---------- */

.quote {
  margin: 2.25rem 0 0;
  padding: 0 0 0 clamp(1.1rem, 3vw, 1.9rem);
  border-left: 3px solid var(--accent);
  max-width: 44rem;
}

.quote p {
  font-family: var(--font-head);
  font-size: clamp(1.2rem, 1.05rem + 0.7vw, 1.5rem);
  line-height: 1.42;
  margin-bottom: 1rem;
}

.quote cite {
  display: block;
  font-style: normal;
  font-size: var(--step--1);
  letter-spacing: 0.04em;
  color: var(--muted);
}

.quote cite::before {
  content: "— ";
}

/* ---------- cta ---------- */

.cta {
  background-color: var(--accent);
  color: var(--accent-contrast);
  padding-block: clamp(2.75rem, 6vw, 4.25rem);
  border-top: 1px solid var(--accent) !important;
}

.cta h2 {
  max-width: 34ch;
}

.cta p {
  color: color-mix(in srgb, var(--accent-contrast) 84%, var(--accent));
  font-size: var(--step-1);
  max-width: 48ch;
}

.cta .button {
  margin-top: 1.75rem;
  margin-right: 0.6rem;
}

.cta .button-primary {
  background-color: var(--accent-contrast);
  border-color: var(--accent-contrast);
  color: var(--accent);
}

.cta .button-primary:hover {
  background-color: color-mix(in srgb, var(--accent-contrast) 88%, var(--accent));
  border-color: color-mix(in srgb, var(--accent-contrast) 88%, var(--accent));
}

.cta .button-secondary {
  border-color: color-mix(in srgb, var(--accent-contrast) 55%, var(--accent));
  color: var(--accent-contrast);
}

.cta .button-secondary:hover {
  border-color: var(--accent-contrast);
  background-color: color-mix(in srgb, var(--accent-contrast) 12%, transparent);
  color: var(--accent-contrast);
}

.cta a:not(.button) {
  color: var(--accent-contrast);
}

/* ---------- form ---------- */

.form {
  margin-top: 2.25rem;
  max-width: 34rem;
  display: grid;
  gap: 1.25rem;
}

.field {
  display: grid;
  gap: 0.4rem;
}

.field label {
  font-size: var(--step--1);
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
}

.form input,
.form select,
.form textarea {
  width: 100%;
  font: inherit;
  color: var(--text);
  background-color: var(--bg);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  padding: 0.7rem 0.8rem;
  transition: border-color 140ms ease, box-shadow 140ms ease;
}

.form textarea {
  min-height: 9rem;
  resize: vertical;
}

.form input:focus,
.form select:focus,
.form textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-quiet);
}

.form input::placeholder,
.form textarea::placeholder {
  color: color-mix(in srgb, var(--muted) 75%, var(--bg));
}

.field p,
.form > p {
  font-size: var(--step--1);
  color: var(--muted);
  margin: 0;
  max-width: 52ch;
}

.form .button {
  justify-self: start;
}

/* ---------- footer ---------- */

.site-footer {
  border-top: 1px solid var(--line);
  background-color: var(--surface);
  padding-block: clamp(2.25rem, 5vw, 3.25rem);
  font-size: var(--step--1);
  color: var(--muted);
}

.site-footer p {
  max-width: 60ch;
  margin-bottom: 0.6rem;
}

.site-footer a {
  color: var(--accent);
}

.site-footer strong {
  display: block;
  font-family: var(--font-head);
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 0.6rem;
}

.site-footer nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 1.2rem;
  margin-top: 1.1rem;
  padding-top: 1.1rem;
  border-top: 1px solid var(--line-strong);
}

/* ---------- small screens ---------- */

@media (max-width: 34rem) {
  .header-inner {
    padding-block: 0.75rem;
  }

  .site-nav {
    width: 100%;
    margin-left: 0;
    gap: 0 1rem;
    justify-content: flex-start;
  }

  .site-nav a {
    padding-block: 0.4rem;
  }

  .hero .button,
  .cta .button {
    display: block;
    text-align: center;
    margin-right: 0;
    margin-top: 0.7rem;
  }

  .hero .button:first-of-type,
  .cta .button:first-of-type {
    margin-top: 1.6rem;
  }
}

@media (min-width: 48rem) {
  .facts {
    border-inline: 1px solid var(--line);
  }
}

/* ---------- motion ---------- */

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

  .button:hover {
    transform: none;
  }
}

/* ---------- print ---------- */

@media print {
  .site-header,
  .cta {
    position: static;
    background: none;
    color: #000;
  }

  body {
    background: #fff;
    color: #000;
  }
}