:root {
  color-scheme: light;
  --ink: #173b36;
  --muted: #52615e;
  --brand: #117b6d;
  --surface: #ffffff;
  --page: #f5f9f8;
  --line: #d9e5e1;
  font-family: Aptos, "Segoe UI", Arial, sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  padding: 32px 16px;
  background: var(--page);
  color: var(--ink);
  line-height: 1.65;
}

main {
  max-width: 820px;
  margin: 0 auto;
  padding: clamp(24px, 5vw, 48px);
  border: 1px solid var(--line);
  border-radius: 20px;
  background: var(--surface);
  box-shadow: 0 12px 36px #173b3610;
}

a {
  color: var(--brand);
}

h1,
h2 {
  color: var(--ink);
  line-height: 1.25;
}

h1 {
  margin-top: 0;
  font-size: clamp(2rem, 5vw, 2.7rem);
}

h2 {
  margin-top: 2rem;
  font-size: 1.3rem;
}

.brand {
  margin: 0 0 8px;
  color: var(--brand);
  font-size: .9rem;
  font-weight: 700;
  letter-spacing: .12em;
  text-transform: uppercase;
}

.updated,
.muted {
  color: var(--muted);
}

.callout {
  padding: 16px 18px;
  border-left: 4px solid var(--brand);
  border-radius: 8px;
  background: var(--page);
}

label {
  display: block;
  margin: 16px 0 6px;
  font-weight: 650;
}

input,
select,
textarea {
  width: 100%;
  padding: 12px;
  border: 1px solid #9aaba6;
  border-radius: 8px;
  color: var(--ink);
  font: inherit;
}

textarea {
  min-height: 120px;
  resize: vertical;
}

button,
.button {
  display: inline-block;
  margin-top: 20px;
  padding: 12px 18px;
  border: 0;
  border-radius: 9px;
  background: var(--brand);
  color: #fff;
  font: inherit;
  font-weight: 700;
  text-decoration: none;
  cursor: pointer;
}

footer {
  margin-top: 36px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: .92rem;
}

@media (prefers-reduced-motion: no-preference) {
  a,
  button {
    transition: filter .15s ease;
  }

  a:hover,
  button:hover {
    filter: brightness(.9);
  }
}