:root {
  --ink: #171d19;
  --muted: #66746b;
  --green: #58b76f;
  --green-deep: #159447;
  --green-soft: #e9f6eb;
  --white: #fffdf8;
  --paper: #fafaf6;
  --border: rgba(23, 29, 25, 0.1);
  --shadow: 0 28px 90px rgba(35, 58, 43, 0.1);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background:
    radial-gradient(circle at 82% 8%, rgba(88, 183, 111, 0.12), transparent 28rem),
    var(--white);
  color: var(--ink);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.65;
}

a {
  color: var(--green-deep);
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1120px;
  margin: 0 auto;
  padding: 28px clamp(20px, 5vw, 56px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  font-weight: 760;
  text-decoration: none;
}

.brand-mark {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background:
    radial-gradient(circle at 50% 32%, #f8fff5 0 17%, transparent 18%),
    radial-gradient(ellipse at 50% 72%, #f8fff5 0 28%, transparent 29%),
    linear-gradient(135deg, #9bdc81, var(--green));
  box-shadow: 0 10px 24px rgba(88, 183, 111, 0.3);
}

.header-link {
  color: rgba(23, 29, 25, 0.68);
  font-size: 14px;
  font-weight: 700;
  text-decoration: none;
}

main {
  width: min(900px, calc(100% - 36px));
  margin: 44px auto 96px;
}

.intro {
  margin-bottom: 34px;
}

.kicker {
  margin: 0 0 12px;
  color: var(--green-deep);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

h1 {
  max-width: 760px;
  margin: 0 0 18px;
  font-size: clamp(46px, 8vw, 82px);
  line-height: 1;
  letter-spacing: -0.04em;
}

.lede {
  max-width: 720px;
  margin: 0;
  color: var(--muted);
  font-size: clamp(18px, 2.6vw, 24px);
  line-height: 1.45;
}

.updated {
  margin-top: 18px;
  color: rgba(23, 29, 25, 0.5);
  font-size: 14px;
}

.content-card {
  padding: clamp(24px, 5vw, 58px);
  border: 1px solid var(--border);
  border-radius: 30px;
  background: rgba(255, 255, 255, 0.78);
  box-shadow: var(--shadow);
}

section + section {
  margin-top: 36px;
  padding-top: 34px;
  border-top: 1px solid var(--border);
}

h2 {
  margin: 0 0 12px;
  font-size: clamp(24px, 3.5vw, 34px);
  line-height: 1.2;
}

h3 {
  margin: 22px 0 8px;
  font-size: 18px;
}

p,
li {
  color: rgba(23, 29, 25, 0.75);
}

ul {
  padding-left: 1.3rem;
}

.contact-box {
  margin-top: 24px;
  padding: 22px;
  border-radius: 20px;
  background: var(--green-soft);
}

.contact-box p {
  margin: 0;
}

.action {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  margin-top: 18px;
  padding: 0 22px;
  border-radius: 999px;
  background: var(--ink);
  color: var(--white);
  font-weight: 760;
  text-decoration: none;
}

.page-footer {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 24px;
  justify-content: center;
  padding: 0 20px 40px;
  color: rgba(23, 29, 25, 0.55);
  font-size: 13px;
}

.page-footer a {
  color: inherit;
}

@media (max-width: 560px) {
  main {
    margin-top: 24px;
  }

  .content-card {
    border-radius: 24px;
  }
}

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