:root {
  --color-text: #1f2933;
  --color-muted: #52606d;
  --color-bg: #ffffff;
  --color-bg-alt: #f4f7f6;
  --color-accent: #2d6a4f;
  --color-accent-dark: #1b4332;
  --color-border: #e1e7e3;
  --font-body: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --max-width: 64rem;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 1.0625rem;
  line-height: 1.65;
  color: var(--color-text);
  background: var(--color-bg);
}

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

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.25rem;
}

.narrow {
  max-width: 42rem;
}

.center {
  text-align: center;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

/* Header */
.site-header {
  border-bottom: 1px solid var(--color-border);
  background: var(--color-bg);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 0.75rem;
  padding-bottom: 0.75rem;
}

.brand img {
  display: block;
}

.nav-list {
  display: flex;
  gap: 1.5rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-list a {
  color: var(--color-text);
  text-decoration: none;
  font-weight: 600;
}

.nav-list a:hover {
  color: var(--color-accent);
}

/* Hero */
.hero {
  background: var(--color-bg-alt);
  padding: 3rem 0;
}

.hero-inner {
  display: grid;
  gap: 2rem;
  align-items: center;
}

@media (min-width: 48rem) {
  .hero-inner {
    grid-template-columns: 1fr 1fr;
  }
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--color-accent);
  margin: 0 0 0.5rem;
}

h1 {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  line-height: 1.2;
  margin: 0 0 1rem;
}

h2 {
  font-size: 1.375rem;
  margin: 0 0 0.75rem;
}

h2 + h2,
p + h2,
ul + h2 {
  margin-top: 2rem;
}

.lead {
  font-size: 1.1875rem;
  color: var(--color-muted);
}

.hero-media img {
  border-radius: 0.75rem;
  display: block;
}

/* Sections */
.section {
  padding: 2.75rem 0;
}

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

.cards {
  display: grid;
  gap: 1.5rem;
}

@media (min-width: 48rem) {
  .cards {
    grid-template-columns: 1fr 1fr;
  }
}

.card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 0.75rem;
  padding: 1.5rem;
}

ul {
  padding-left: 1.25rem;
}

li {
  margin-bottom: 0.375rem;
}

/* Buttons */
.btn {
  display: inline-block;
  background: var(--color-accent);
  color: #fff;
  font-weight: 600;
  text-decoration: none;
  padding: 0.75rem 1.5rem;
  border-radius: 0.5rem;
  border: 0;
  font-size: 1rem;
  cursor: pointer;
}

.btn:hover {
  background: var(--color-accent-dark);
}

/* Signup form */
.signup {
  background: var(--color-accent-dark);
  color: #fff;
}

.signup h2 {
  color: #fff;
}

.signup-form {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin: 1.25rem 0;
}

.signup-form input {
  flex: 1 1 12rem;
  padding: 0.75rem 1rem;
  border-radius: 0.5rem;
  border: 1px solid var(--color-border);
  font-size: 1rem;
  font-family: var(--font-body);
}

.signup-notes {
  list-style: none;
  padding: 0;
  font-size: 0.9375rem;
  opacity: 0.9;
}

.final-note {
  font-size: 1.125rem;
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--color-border);
  background: var(--color-bg-alt);
  padding: 2rem 0;
  font-size: 0.9375rem;
  color: var(--color-muted);
}

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

.footer-brand {
  font-size: 1.0625rem;
  color: var(--color-text);
  margin-bottom: 0.25rem;
}

.footer-disclaimer,
.footer-copyright {
  font-size: 0.875rem;
}